Project Abstracts : Embedded Systems, Electrical, power systems & Microcontroller Projects
HOME AUTOMATION AND SECURITY FOR MOBILE DEVICES
ABSTRACT
As mobile devices continue to grow in popularity and functionality, the demand for advanced ubiquitous mobile applications in our daily lives also increases. This paper deals with the design and implementation of HASec, a Home Automation and Security system for mobile devices, that leverages mobile technology to provide essential security to our homes and associated control operations.
ABSTRACT
As mobile devices continue to grow in popularity and functionality, the demand for advanced ubiquitous mobile applications in our daily lives also increases. This paper deals with the design and implementation of HASec, a Home Automation and Security system for mobile devices, that leverages mobile technology to provide essential security to our homes and associated control operations.
In particular, with the help of mobile devices, HASec operates and controls motion detectors and video cameras for remote sensing and surveillance, streams live video and records it for future playback, and finally manages operations on home appliances, such as turning ON/OFF a television or microwave or altering the intensity of lighting around the house.
The proposed home security solution hinges on our novel integration of cameras and motion detectors into a mobile application. For instance, when motion is detected, the cameras automatically initiate recording and the iOS device alerts the homeowner of the possible intrusion.
HASec has two main components interacting with each other: the iOS application that executes on the mobile device and server-side scripts that run in a cloud. Although HA-Sec is implemented for Apple's iOS devices such as iPhone, iPod Touch, and iPad, it can be easily ported to other mobile platforms. Furthermore, our application is not only limited to smart-phones but also can be used by feature phones through their browsers.
-----------------------------
DESIGN AND DEVELOPMENT OF MICROCONTROLLER BASED ELECTRONIC QUEUE CONTROL SYSTEMS
ABSTRACT
In this work, low-cost, portable microcontroller based electronic queue control (EQC) systems have been developed for the purpose of controlling queue in banking, hotel reservation counter, ticket counter, insurance company, customer service center etc. The aim of the designed systems is to maintain a queue with order and efficiency.
Two different queue control systems have been implemented with slightly different features. In EQC system-1, a general display has been used for displaying token number and service counter number whereas in EQC system-2, each token number has been displayed individually in each service counter with separate displays.
In the both systems, each customer has to collect a token and then will be served whenever the token number is displayed. The systems were designed around a 16F72 IC, a low-cost 8-bit PIC microcontroller and entirely software controlled.
The control programs have been developed using the PIC assembly language. Finally, the systems have been tested under different conditions to evaluate their performance.
-----------------------------
DESIGN AND IMPLEMENTATION OF PYROELECTRIC INFRARED SENSOR BASED SECURITY SYSTEM USING MICROCONTROLLER
ABSTRACT
This paper evaluates the development of a Low-cost security system using small PIR (Pyroelectric Infrared) sensor built around a microcontroller. The low-power PIR detectors take advantage of pyroelectricity to detect a human body that is a constant source of Passive Infrared (radiation in the infrared region).
The system senses the signal generated by PIR sensor detecting the presence of individuals not at thermal equilibrium with the surrounding environment. Detecting the presence of any unauthorized person in any specific time interval, it triggers an alarm & sets up a call to a predefined number through a GSM modem.
This highly reactive approach has low computational requirement, therefore it is well-suited to surveillance, industrial applications and smart environments. Tests performed gave promising results.
-----------------------------
ACCELEROMETER ASSISTED HIGH BANDWIDTH CONTROL OF TIP-TILT MIRROR FOR PRECISION POINTING STABILITY
ABSTRACT
Pointing stability that defines acceptable displacement of an observation target on the optical detector during the exposure time in a satellite telescope system largely dominates the quality of the image. This research proposes a new control approach to improve pointing stability using a tip-tilt mirror.
While conventional control systems for a tip-tilt mirror use feedback error signals obtained from the optical detector, the signal loses enough bandwidth to compensate for high frequency disturbances when pointing at a dark reference guide star.
This paper presents a control system subsidiarily using accelerometers to generate high bandwidth feedforward control references to a tip-tilt mirror by properly identifying transfer function between acceleration and pointing displacement. The numerical simulation and experiments using a disturbance source and a tip-tilt mirror verifies feasibility of this method.
-----------------------------
CONTROL OF BRUSHLESS DC MOTOR WITH AN AVR MICROCONTROLLER
ABSTRACT
This paper illustrates the basic work principle of a brushless DC motor and presents its control method. According to the method, a control system of a brushless DC Motor is designed using an AVR microcontroller. Design of the control system includes hardware circuit designing and software programming.
The hardware structure of the control system consists of a microcontroller ATmega64, power supply circuit, position detection circuit, current chopper circuit, power driving circuit, display circuit and keyboard circuit and so on.
The software is developed by c program language. The software includes main program, initialization program, PWM duty ratio reload program, speed calculation program, closed-loop PID regulation program, interrupt service program, LCD display program, keyboard program etc.
The experiment result shows that the system is with an excellent dynamic and static performance. Its operation is reliable.
-----------------------------
MICROCONTROLLER BASED ON-BOARD DIAGNOSTIC (OBD) SYSTEM FOR NON-OBD VEHICLES
ABSTRACT
This paper proposes the development of On-Board Diagnostic (OBD) system for automobiles.
The proposed OBD system has a microcontroller based processing system and consists of
(1) sensors installed at different parts of vehicle to observe various parameters,
(2) processing unit that will take input from the sensors and signal conditioners, calculate the real-time values of vehicle parameters and give output and
(3) user interface. System will be able to diagnose faults in parameters, abnormal abrupt changes, notify user of any abnormal condition, and in some cases indicate the cause of fault.
This system is designed basically to be implemented on vehicles that do not have factory installed OBD systems, and can be easily fitted without major modifications to the vehicle.
It is user friendly system with LCD and keypad interface though which user can view parameter values, warning notifications and define custom limits for different parameters according to vehicle (other than default values).
-----------------------------
A MICROCONTROLLER BASED MULTI-FUNCTION SOLAR TRACKING SYSTEM
ABSTRACT
Renewable energy solutions are becoming increasingly popular. Photovoltaic (solar) systems are but one example. Maximizing power output from a solar system is desirable to increase efficiency.
In order to maximize power output from solar panels, one needs to keep the panels aligned with the sun. As such, a means of tracking the sun is required. This is definitely a more cost effective solution than purchasing additional solar panels. It has been estimated that the yield from solar panels can be increased by 30 to 60 percent by utilizing a tracking system instead of a stationary array.
In this paper, a prototype for a microcontroller-based multi-function solar tracking system is described, which will keep the solar panels aligned with the sun in order to maximize efficiency.
The maximum power point tracking (MPPT) data can be transmitted in real time to other solar systems in need of this data.
-----------------------------
ARM9-BASED EMBEDDED CONTROLLER OF THE BOILER COMBUSTION
ABSTRACT
Mainly based on a research of controlling the boiler combustion system with the boiler steam pressure, this paper will exploit a controlling system which is basing on the ARM9 embedded boiler combustion controller, for achieving a more accurate control to the burner.
Using the ARM920T kernel 16/32 RISC embedded microprocessor, this system realizes the design of hardware system by being around its periphery. With embedded operating system for Linux environment resume and QT/Embedded for GUI support system, it has its application development.
-----------------------------
WEIGHING SYSTEM OF FRUIT-TRANSPORTATION GYROCAR BASED ON ARM
ABSTRACT
The pilot less fruit-transportation gyro car works in the economic forest, avoiding the obstacle on the rail is the prerequisite of its safe working. An ultrasonic obstacle avoidance system of fruit-transportation gyro car based on ARM embedded system is introduced in this article.
The functions of the system are implemented. It could make the gyro car stop when detect an obstacle and sends the information of obstacle to the monitoring client through GPRS. Through the test, the ultrasonic obstacle avoidance system performs well and reliable.
-----------------------------
ARM9 MULTI-TASK DATA ACQUISITION SYSTEM INTELLIGENT IMPROVEMENT
ABSTRACT
In this paper the improvement plan has been proposed to deal with such shortcomings exists in ARM9 and µC/OS-II real-time multi-tasking data acquisition system, in which task competition exist, the slow implementation of peripherals, in time update cannot be made.
Achieved sampling channel priority dynamic scheduling, real-time parameters acquisition have been set up here. Peripherals operation which constraints of the system performance on the were time optimized, improved the system efficiency, system security, and task synchronous. There briefly illustrated the system frequency limit tests and detail sampling data display on user interface.
-----------------------------
POWER HARVESTING FOR SMART SENSOR NETWORKS IN MONITORING WATER DISTRIBUTION SYSTEM
ABSTRACT
Recently, there has been a growing interest in using wireless sensor networks for monitoring water distribution infrastructure to help drinking water utilities to have better understanding of hydraulic and water quality statement of their underground assets.
One of the challenges is limited power resources for operating the smart sensors and sensor networks. Current common used power supplies for sensor node are batteries. Batteries have many drawbacks such as short life time and need to be replaced on regular basis which is uneconomical and unmanageable in hard access environment such as buried underground water pipelines.
Energy harvesting of ambient energy in the water pipeline and powering wireless sensor node including sensing, processing, and communications would be particularly attractive option because the life time of the node will be potentially infinite for supporting wireless sensor networks.
The paper will review and discuss the potential of using power harvesting techniques for monitoring water distribution networks and the work done in the area of monitoring water distribution systems using smart sensor networks.
-----------------------------
A NOVEL LIGHT-SENSOR-BASED INFORMATION TRANSMISSION SYSTEM FOR INDOOR POSITIONING AND NAVIGATION
ABSTRACT
This paper describes a novel light-sensor-based information transmission system for indoor positioning and navigation with particular benefits for mobile and wearable computers. It can seamlessly extend outdoor GPS tracking to the indoor environment.
In a novel manner, fluorescent light is used as the medium to transmit information, which is encoded by using a pulse-frequency modulation technique. The user receives the encoded light information through a photoreceiver. The information is passed into the wearable or mobile computer after the data are decoded.
This information allows positioning information to be given to indoor mobile and wearable computers. We design an economical transmitter circuit by adding a few components to a commercial electronic ballast circuit for fluorescent lamps with a price of less than 10 USD.
The proposed system can be used in indoor guidance and navigation applications. Exemplary applications are included in the paper, with experimented results detailed.
-----------------------------
AUTONOMOUS PEDESTRIAN COLLISION AVOIDANCE USING A FUZZY STEERING CONTROLLER
ABSTRACT
Collision avoidance is one of the most difficult and challenging automatic driving operations in the domain of intelligent vehicles. In emergency situations, human drivers are more likely to brake than to steer, although the optimal maneuver would, more frequently, be steering alone.
This statement suggests the use of automatic steering as a promising solution to avoid accidents in the future. The objective of this paper is to provide a collision avoidance system (CAS) for autonomous vehicles, focusing on pedestrian collision avoidance. The detection component involves a stereo-vision-based pedestrian detection system that provides suitable measurements of the time to collision.
The collision avoidance maneuver is performed using fuzzy controllers for the actuators that mimic human behavior and reactions, along with a high-precision Global Positioning System (GPS), which provides the information needed for the autonomous navigation.
The proposed system is evaluated in two steps. First, drivers' behavior and sensor accuracy are studied in experiments carried out by manual driving. This study will be used to define the parameters of the second step, in which automatic pedestrian collision avoidance is carried out at speeds of up to 30 km/h. The performed field tests provided encouraging results and proved the viability of the proposed approach.
-----------------------------
THE INTELLIGENT EMBEDDED CONTROL WARNING SYSTEM FOR CAR REVERSING
ABSTRACT
Most of the car drivers used the reverse radar or a reverse camera to detect the road situation behind the vehicle when it is engaged in reverse gear. As a matter of fact, the pedestrians can virtually know if the vehicle is backing up or not only by seeing the permanent bright reverse lamps. And as there is not much change with the reverse lamp to be seen, therefore their warning function for pedestrians seems to be still insufficient eventually.
Therefore, this research tries to design a set of embedded intelligent car backup warning system so as to promote the safety of the walkers or the other drivers on the road. This embedded system uses Microsoft Win CE operating system and matches with the Mini2440 developing board. It also uses the Visual Studio 2005 for developing the intelligent touch panel operating mode.
The UART interface on the Mini 2440 developing board controls the frequency converter, RC server and LED by using PIC16F877 to transform the signal of the sensors. And then, connecting to the sensors of angle, luminosity and distance so as to read the voltage value of the sensor and transferring them into actual values and followed by using 27 fuzzy logic rules to carry on the fuzzy logic deduction. And the angle of the LED reverse lamp bracket is adjusted and driven automatically according to the results of this logic deduction eventually.
This research tries to do the simulated test by using a mobile frame in the same height as a real automobile. To let the test mobile frame being located 240 cm away from the obstacle and then start the driven motor and set the frequency of it to be with 60 Hz. (in other words, its speed is approximately in 2.52 Km/h.) the let the test mobile frame to stop at 40 cm in front of the obstacle.
We found out that the warning lamp bracket installation angle will be changed correspondently with the distance between test mobile frame and obstacle and being declined automatically from 90 degree to 0 degree. Apparently, from th- - e test results, it has been proven that this system can reach the goal of automatically controlled car back-up warning function truly.
-----------------------------
ADVANCEMENTS IN NONCONTACT, MULTIPARAMETER PHYSIOLOGICAL MEASUREMENTS USING A WEBCAM
ABSTRACT
We present a simple, low-cost method for measuring multiple physiological parameters using a basic webcam. By applying independent component analysis on the color channels in video recordings, we extracted the blood volume pulse from the facial regions.
Heart rate (HR), respiratory rate, and HR variability (HRV, an index for cardiac autonomic activity) were subsequently quantified and compared to corresponding measurements using Food and Drug Administration-approved sensors.
High degrees of agreement were achieved between the measurements across all physiological parameters. This technology has significant potential for advancing personal health care and telemedicine.
-----------------------------
CLOSED-LOOP ANESTHETIC DRUG CONCENTRATION ESTIMATION USING CLINICAL-EFFECT FEEDBACK
ABSTRACT
This letter presents a novel closed-loop approach to anesthetic drug concentration estimation using clinical-effect measurement feedback. Compared with the open-loop prediction used in current target-controlled infusion systems, closed-loop estimation exploits the discrepancy between the measured and predicted clinical effects to make corrections to the drug-concentration estimate, achieving improved robustness against variability in the patient pharmacokinetics and pharmacodynamics.
A robust estimator, which processes drug administration and clinical-effect measurements to estimate the plasma- and effect-site drug concentrations, is designed using -synthesis theory. Initial proof of principle of the closed-loop estimation is demonstrated using the Monte Carlo simulation of surgical procedures with a wide range of patient models.
Closed-loop estimation results in statistically significant reductions in median percentage, median absolute percentage, and maximum absolute percentage drug-concentration errors compared to open-loop prediction.
-----------------------------
MULTIPLE FUNCTIONAL ECG SIGNAL IS PROCESSING FOR WEARABLE APPLICATIONS OF LONG-TERM CARDIAC MONITORING
ABSTRACT
In this paper, an integrated electrocardiogram (ECG) signal-processing scheme is proposed. Using a systematic wavelet transform algorithm, this signal-processing scheme can realize multiple functions in real time, including baseline-drift removal, noise suppression, QRS detection, heart beat rate prediction and classification, and clean ECG reconstruction.
Utilizing the novel low-cost hardware architecture, the proposed ECG signal-processing scheme is implemented in application-specific integrated circuits with 0.18 µm CMOS technology.
This ECG signal-processor chip achieves low area and power consumptions, and is highly suitable for wearable applications of long-term cardiac monitoring.
-----------------------------
HEARTBEAT CLASSIFICATION USING FEATURE SELECTION DRIVEN BY DATABASE GENERALIZATION CRITERIA
ABSTRACT
In this paper, we studied and validated a simple heart beat classifier based on ECG feature models selected with the focus on an improved generalization capability. We considered features from the RR series, as well as features computed from the ECG samples and different scales of the wavelet transform, at both avail able leads.
The classification performance and generalization were studied using publicly available databases: the MIT-BIH Arrhythmia, the MIT-BIH Supraventricular Arrhythmia, and the St. Pe tersburg Institute of Cardiological Technics (INCART) databases. The Association for the Advancement of Medical Instrumentation recommendations for class labeling and results presentation were followed.
A floating feature selection algorithm was used to obtain the best performing and generalizing models in the training and validation sets for different search configurations. The best model found comprehends eight features, was trained in a partition of the MIT-BIH Arrhythmia, and was evaluated in a completely disjoint partition of the same database.
The results obtained were: global accuracy of 93%; for normal beats, sensitivity (S) 95%, positive predictive value (P+) 98%; for supraventricular beats, S 11%, P+ 39%; and for ventricular beats S 81%, P+ 87%. In order to test the generalization capability, performance was also evaluated in the INCART, with results comparable to those obtained in the test set.
This classifier model has fewer features and performs better than other state-of-the-art methods with results suggesting better generalization capability.
-----------------------------
MONITORING OF POSTURE ALLOCATIONS AND ACTIVITIES BY A SHOE-BASED WEARABLE SENSOR
ABSTRACT
Monitoring of posture allocations and activities enables accurate estimation of energy expenditure and may aid in obesity prevention and treatment. At present, accurate devices rely on multiple sensors distributed on the body and thus may be too obtrusive for everyday use.
This paper presents a novel wearable sensor, which is capable of very accurate recognition of common postures and activities. The patterns of heel acceleration and plantar pressure uniquely characterize postures and typical activities while requiring minimal preprocessing and no feature extraction. The shoe sensor was tested in nine adults performing sitting and standing postures and while walking, running, stair ascent/descent and cycling.
Support vector machines (SVMs) were used for classification. A fourfold validation of a six-class subject-independent group model showed 95.2% average accuracy of posture/activity classification on full sensor set and over 98% on optimized sensor set.
Using a combination of acceleration/pressure also enabled a pronounced reduction of the sampling frequency (25 to 1 Hz) with out significant loss of accuracy (98% versus 93%). Subjects had shoe sizes (US) M9.5-11 and W7-9 and body mass index from 18.1 to 39.4 kg/m2 and thus suggesting that the device can be used by individuals with varying anthropometric characteristics.
A WEB-BASED SYSTEM FOR HOME MONITORING OF PATIENTS WITH PARKINSON'S DISEASE USING WEARABLE SENSORS
ABSTRACT
This letter introduces MercuryLive, a platform to enable home monitoring of patients with Parkinson's disease (PD) using wearable sensors. MercuryLive contains three tiers: a resource-aware data collection engine that relies upon wearable sensors, web services for live streaming and storage of sensor data, and a web-based graphical user interface client with video conferencing capability.
Besides, the platform has the capability of analyzing sensor (i.e., accelerometer) data to reliably estimate clinical scores capturing the severity of tremor, bradykinesia, and dyskinesia.
Testing results showed an average data latency of less than 400 ms and video latency of about 200 ms with video frame rate of about 13 frames/s when 800 kb/s of bandwidth were available and we used a 40% video compression, and data feature upload requiring 1 min of extra time following a 10 min interactive session.
These results indicate that the proposed platform is suitable to monitor patients with PD to facilitate the titration of medications in the late stages of the disease.
-----------------------------
MAPPING AND PURSUIT-EVASION STRATEGIES FOR A SIMPLE WALL-FOLLOWING ROBOTABSTRACT
This paper defines and analyzes a simple robot with local sensors that moves in an unknown polygonal environment. The robot can execute wall-following motions and can traverse the interior of the environment only when following parallel to an edge.
The robot has no global sensors that would allow precise mapping or localization. Special information spaces are introduced for this particular model.
Using these, strategies are presented to solve several tasks:
1) counting vertices,
2) computing the path winding number,
3) learning a combinatorial map, which is called the cut ordering, that encodes partial geometric information, and
4) solving pursuit-evasion problems.
-----------------------------
METHODS AND TECHNOLOGIES FOR THE IMPLEMENTATION OF LARGE-SCALE ROBOT TACTILE SENSORS
ABSTRACT
Even though the sense of touch is crucial for humans, most humanoid robots lack tactile sensing. While a large number of sensing technologies exist, it is not trivial to incorporate them into a robot. We have developed a compliant “skin” for humanoids that integrates a distributed pressure sensor based on capacitive technology.
The skin is modular and can be deployed on nonflat surfaces. Each module scans locally a limited number of tactile-sensing elements and sends the data through a serial bus. This is a critical advantage as it reduces the number of wires.
The resulting system is compact and has been successfully integrated into three different humanoid robots. We have performed tests that show that the sensor has favorable characteristics and implemented algorithms to compensate the hysteresis and drift of the sensor. Experiments with the humanoid robot iCub prove that the sensors can be used to grasp unmodeled, fragile objects.
-----------------------------
TWO-FLEXIBLE-FINGERS GRIPPER FORCE FEEDBACK CONTROL SYSTEM FOR ITS APPLICATION AS END EFFECTOR ON A 6-DOF MANIPULATOR
ABSTRACT
Flexible manipulators have many advantages over rigid robots when used in grasping tasks, owing to the characteristic flexibility of the materials used in their construction, which allow them to absorb energy during impact and make them controllable in order to limit the force applied during contact. In this paper, a two-flexible-finger gripper with a simple sensory feedback system is proposed.
A generalized proportional-integral controller is implemented to acquire high control accuracy, while eliminating the need for derivatives of system output. The performance of this force feedback control system is investigated when mounted on a 6-degree-of-freedom (6-DOF) manipulator and grasping different objects.
The experimental results indicate that the system proposed is able to manipulate different types of objects (both rigid and flexible) in an industrial environment by perfectly controlling the applied contact torque.
-----------------------------
UNICURSAL GESTURE INTERFACE FOR TV REMOTE WITH TOUCH SCREENS
ABSTRACT
We propose a new gesture interface based on unicursal figures for TV control via touch-screen personal devices. The interface is a powerful but simple way of accessing the multiple functions of modern TVs.
Unicursal figures are made without lifting the thumb from the screen and sequences of commands can be issued without needing to confirm the thumb's position. Trial use confirms the feasibility of this interface.
-----------------------------
CONTACTLESS GESTURE RECOGNITION SYSTEM USING PROXIMITY SENSORS
ABSTRACT
In this paper, we present a novel contactless gesture recognition system using proximity sensors. A set of infrared signal feature extraction methods and a decision-tree-based gesture classifier are proposed.
The system allows a user to interact with mobile devices using intuitive gestures, without touching the screen or wearing/holding any additional device.
Evaluation results show that the system is low-power, and able to recognize 3D gestures with over 98% precision in real time.
-----------------------------
TOUCH-SCREEN TERMINAL APPLICATION FOR REMOTE DATA BASED ON AUTHORIZED ACCESS
ABSTRACT
Touch-screen all-in-one-machine is the simplest, most convenient and most natural human-computer interaction method as a new kind of computer input devices.
For the disadvantages of the current touch screen systems such as the relatively simple function of the system and the lack of security features, this paper proposes a common software interface, which makes use of B/S mode to realize the browsing of the remote data, provides the authorized access mechanism based on Web secure access control, and achieves classification access of the remote data.
-----------------------------
GESTURE CONTROL AND THE NEW AND INTELLIGENT MAN-MACHINE INTERFACE
ABSTRACT
Summary form only given. Human-computer interfaces (HCI) have evolved from mouse-keyboard based interaction using text and mouse events to multi-touch screens and other exotic approaches such as using special gloves or other devices to translate human actions into application controls.
One of the trends which are “en vogue” in our days is the control of computer applications and/or computer controlled devices using human gestures and/or body movements. There were and still are a series of attempts to produce computer control scripts via gesture based interfaces, and research literature is abundant in papers on this subject.
However, little or few are of value, as the computer based control via gestures has to be robust and in real-time. Any lag in the result can lead to users abandoning it. More recently, 3D IR cameras provide a promised path to produce depth images. The depth information extracted by the 3D IR camera is mapped to different grey levels in a black and white image.
This image is finally interpreted by image processing suites. 3D IR cameras use near-infrared illumination, allowing objects that are closer to the camera to appear brighter than the rest. This means that computer vision software modules can much more accurately distinguish hands and fingers from the rest of a person's body, even in complete darkness.
In this talk, we will discuss various technologies to be used to build a 3D IR Camera, review which will be finalized with a discussion of the 3D IR Camera designed and implemented by our group. Based on data provided by the 3D IR Camera a series of related image processing applications will be discussed.
A demonstration, of a 3D IR camera system will be presented and applications related to gaming, learning, and immersion in a 3D virtual reality space will be given at the end.
-----------------------------
COMPUTATIONALLY EFFICIENT NAVIGATION SYSTEM FOR UNMANNED GROUND VEHICLES
ABSTRACT
This paper proposes to enhance the existing methods of Self-Supervised Learning (SSL) with application to autonomous navigation systems through efficient computational approaches that are the principal requirements in a practical system.
First, confidence-based auto labeling for self-supervised learning is introduced which identifies and eliminates the input samples with low confidence level that are susceptible to be mislabeled. Then, a biologically inspired saliency detection approach for feature biasing is presented which is able to detect the salient features through top-down task specific guidance.
The proposed methods are general and can be applied to a variety of applications. Finally, experimental results on real datasets from the DARPA-LAGR program are given to illustrate the effectiveness of the proposed approaches.
----------------------------
CONSTRUCTION OF AN OBSTACLE MAP AND ITS REALTIME IMPLEMENTATION ON AN UNMANNED GROUND VEHICLE
ABSTRACT
This paper presents the development of an obstacle mapping system based on the concept of a Probabilistic Threat Exposure Map (PTEM). The paper also discusses the realtime embedded implementation of this obstacle mapping system on a small Unmanned Ground Vehicle (UGV) to support realtime obstacle avoidance.
These activities are a part of a larger effort to establish a theoretical foundation for autonomous and cooperative multi-UxV guidance solutions in adversarial environments.
-----------------------------
AN INTELLIGENT LOW-COST SCANNING RANGE FINDER
ABSTRACT
In this paper, we present an intelligent, low-cost scanning range finder for collision avoidance on systems with limited processing power. Our range finder is made low cost and computationally efficient by taking into consideration the actual planning needs for local obstacle avoidance algorithms to dynamically select the area to sample range measurements from.
We present a modified version of Trajectory Rollout which takes into account the limited sensory, and present a sensory sampling strategy based on the needs of this trajectory planner.
Finally, we present the construction and deployment of the sensor on a robot in both telepresence and autonomous operation.
-----------------------------
DESIGN OF A POWER-ASSIST WHEELCHAIR FOR PERSONS WITH HEMIPLEGIA
ABSTRACT
Persons with hemiplegia often require a one arm drive wheelchair. Current designs exhibit substantially degraded performance when compared to a standard manual wheelchair. A power-assist, one arm drive wheelchair was developed that was maneuverable, foldable and easy to operate.
A motor powers the wheel on the user's affected side, encoders on both rear wheels track wheel positions and a rotary heel interface mounted on a footrest controls steering. A control system analyzes wheel and steering positions and responds to the motion of the hand-driven wheel.
The prototype met and exceeded predetermined design specifications based on standard industry test procedures. The power-assist components could be attached to a wide range of manual wheelchairs with only minimal modifications
CONTROL LAYER FOR MULTI-VENDOR INDUSTRIAL ROBOT INTERACTION PROVIDING INTEGRATION OF SUPERVISORY PROCESS CONTROL AND MULTIFUNCTIONAL CONTROL UNITS
ABSTRACT
Based on recent industrial needs for a flexible integration of supervisory control systems and novel intuitive manual control units a new control layer is introduced. The control layer affords adaptive behaviour in terms of process and motion planning as well as flexible manual control of arbitrary robot controllers. It is located between the industrial robot controller and the control units.
For the purpose of a flexible manufacturer-independent access to the robot controller we define an object-oriented programming interface. The set of robot commands is manufacturer-independent and includes all basic robot functions regarding motion and program control.
An inherent capability of the control layer is the transformation of neutral object-oriented robot commands to manufacturer-specific robot languages. With an emphasis on the development of a flexible control layer, we aim for a media-independent communication solution. In order to cover a broad range of robotic applications, different communication standards of industrial automation are implemented.
Finally, two applications, a smartphone robot control and a distributed robot control system, are presented and discussed.
-----------------------------
DYNAMIC MODELING AND ENERGY CONSUMPTION ANALYSIS OF CRAB WALKING OF A SIX-LEGGED ROBOT
ABSTRACT
In this paper, an attempt has been made to develop a detailed dynamic model of a realistic six-legged robot during its crab motion. An energy consumption model has been derived for statically stable wave-crab gaits after considering a minimum of dissipating energy for optimal feet forces distributions.
Two approaches, such as minimization of norm of feet forces and minimization of norm of joint torques have been developed. The performances of these approaches have been compared with each other for different values of duty factor.
The effects of walking parameters, namely velocity, stroke, duty factor and crab angle are studied on energy consumption during crab walking. Wave gait with a lower duty factor is found to be more energy-efficient compared to that with the higher duty factor at the highest possible velocity.
-----------------------------
INTELLIGENT OBSTACLE AVOIDENCE SYSTEM DESIGN OF AN UNMANNED GROUND VEHICLE WITH STEREO VISION
ABSTRACT
The main theme of this paper is to develop a navigation vehicle system without GPS. With stereo vision, the geographic information ahead of the vehicle is obtained by the principle of plane induced parallax. The profiles of left and right vision are acquired by Canny Edge Detection algorithm.
Then, an intersection line of the obstacle and the level ground is found by the way of image processing. Finally, the position and distance of the obstacle is calculated by the homography matrix method.
Integrating the above-distributed schemes unmanned vehicle can avoid collisions with obstacles and arrive at the target in difference scenario. Experimental results show that the proposed navigation and control methodology are practicable.
-----------------------------
WIND ESTIMATION AND AIRSPEED CALIBRATION USING A UAV WITH A SINGLE-ANTENNA GPS RECEIVER AND PITOT TUBE
ABSTRACT
This paper proposes a method that uses an aircraft with a single-antenna GPS receiver and Pitot tube to estimate wind speed and direction and to calibrate the airspeed. This sensor combination alone does not determine the true attitude of the aircraft, so the wind parameters cannot be obtained directly from the measurements.
However, if the aircraft flies at different headings, such as in banking turns or circle maneuvers, the wind magnitude and direction can be estimated from the geometrical relation between the wind and the measurements. An extended Kalman filter (EKF) is applied to estimate wind parameters.
The EKF can also estimate the scaling factor used to convert dynamic pressure to airspeed. This is useful for the operation of small unmanned aerial vehicles (UAVs) because of difficulty in determining the airspeed scaling factor of a low-cost UAV.
Simulations are performed for a constant 2-D wind. To test the effectiveness of the proposed method, flight tests of a small UAV are conducted. Simulations and flight test results show that the proposed method is effective.
-----------------------------
A TALKING ROBOT AND ITS HUMAN-LIKE EXPRESSIVE SPEECH PRODUCTION
ABSTRACT
A talking robot which adaptively learns the vocalization skill by an auditory feedback learning is being developed. The talking robot is constructed by the mechanical vocal systems, which respectively correspond to human organs.
In vocalization, the vibration of vocal cords generates a source sound, and then the sound wave is led to a vocal tract, which works as a resonance filter to determine the spectrum envelope.
The talking robot autonomously learns the vocalization by applying auditory feedback. In this study, a human-like expressive speech production by the talking robot is introduced. A human generates speech by controlling their own vocal organs for changing the speech expressions such as the volume and the intonations.
To realize the human-like expressive speech production, a control method for the mechanical organs has to be established. In the first part of the paper, the construction of the talking robot and the acquisition of the vocalization will be described, and then the control method for producing human-like speech with various expressions will be introduced.
-----------------------------
A PATROLLING SCHEME IN WIRELESS SENSOR AND ROBOT NETWORKS
ABSTRACT
In this paper, we design a bio-inspired patrolling algorithm based on digital pheromone. As events have different importance, we refer to them as having different priorities.
In our patrolling schemes, robots efficiently handle as many high priority events as possible. Inspired by the pheromone-based communication among ants, we introduce the concept of digital pheromones and propose a digital pheromone-based patrolling algorithm.
Digital pheromones are introduced to denote the priority of an event. The main purpose of this algorithm is to lead robots to handle more events with higher priorities. Simulations demonstrate the impact of robots' patrol speed, speed of robots' handling events, etc.
-----------------------------
DYNAMIC VEHICLE ROUTING FOR ROBOTIC SYSTEMS
ABSTRACT
Recent years have witnessed great advancements in the science and technology of autonomy, robotics and networking. This paper surveys recent concepts and algorithms for dynamic vehicle routing (DVR), that is, for the automatic planning of optimal multi-vehicle routes to perform tasks that are generated over time by an exogenous process.
We consider a rich variety of scenarios relevant for robotic applications. We begin by reviewing the basic DVR problem: demands for service arrive at random locations at random times and a vehicle travels to provide on-site service while minimizing the expected wait time of the demands.
Next, we treat different multi-vehicle scenarios based on different models for demands (e.g., demands with different priority levels and impatient demands), vehicles (e.g., motion constraints, communication and sensing capabilities), and tasks. The performance criterion used in these scenarios is either the expected wait time of the demands or the fraction of demands serviced successfully.
In each specific DVR scenario, we adopt a rigorous technical approach that relies upon methods from queueing theory, combinatorial optimization and stochastic geometry.
First, we establish fundamental limits on the achievable performance, including limits on stability and quality of service. Second, we design algorithms, and provide provable guarantees on their performance with respect to the fundamental limits.
-----------------------------
SITUATION-DRIVEN CONTROL OF A ROBOTIC WHEELCHAIR TO FOLLOW A CAREGIVER
ABSTRACT
Recently, several robotic/intelligent wheelchairs that have autonomous functions to get to some goals or user-friendly interfaces, have been proposed. Although it is desirable for wheelchair users to go out alone, caregivers often accompany them.
Therefore it is important to consider reducing caregivers' load and support their activities. Hence, we have proposed a robotic wheelchair that can move with a caregiver side by side by observing his/her behaviors such as body position and orientation.
This way of motion enables easy communication between the wheelchair user and the caregiver. However, caregivers cannot always move with the wheelchair side by side. For instance, they may step forward of the wheelchair to open a door, and they may step aside when pedestrians are approaching in narrow corridors.
To cope with these situations we propose a new robotic wheelchair that can move with a caregiver collaboratively depending on the situation. A laser range sensor is used for observing the environment around the wheelchair. When any obstacles are found in its travelling direction, the wheelchair gives up moving with the caregiver side by side and follows him/her behind. When the caregiver stops at a door, the wheelchair waits for him/her to open the door and follows him/her while avoiding obstacles.
The wheelchair returns to move side by side with the caregiver when it enters wide space. We propose a motion control method based on the potential field method, which enables the wheelchair to take an appropriate position with respect to the caregiver depending on the situation.
-----------------------------
OBSTACLE AVOIDANCE IN MOBILE ROBOT USING NEURAL NETWORK
Investigate mobile robot's history, obstacle avoidance is one of most important research area and also the foundation of building robot's successful behaviors.
This paper proposes a Neural Network control system that is able to guide the mobile robots (AmigoBot and P3DX) traverse through a maze with arbitrary obstacles. The pattern is trained by using Matlab toolbox and Aria library for motion control.
There are 256 specific patterns defined to help robot organize the situation. For input data, sonar and laser range finder are two main sensors for passing on information of environment.
The empirical results show the effectiveness and the validity of the obstacle avoidance behavior of Neural Network control strategy.
-----------------------------
THE REMOTE CONTROL OF MOBILE ROBOT BASED ON EMBEDDED TECHNOLOGY
ABSTRACT
Along with the development of society, the remote control of mobile robot has broad prospect of application. With the continuous development of embedded system, the system provides excellent hardware platform for embedded mobile robot.
With embedded WinCE5.0 operating system, This paper put forward a kind of remote control method of mobile robots. The experiments had proved the embedded mobile robot has low power consumption and strong real-time control. It also had proved the validity of this method.
-----------------------------
DESIGN AND IMPLEMENTATION OF A BALL-SHOOTING ROBOT WITH IR-BASED EMBEDDED VISION
ABSTRACT
The purpose of this paper is to design and construct an entertainment robot with sports skills. The robot basic action involves the robot movement and ball throwing. The desired tasks can be achieved through vision and motors coordination.
Robot itself is equipped with DC and servo motors in order to drive the wheels and arm, the Wiimote for sensing the IR target, and Bluetooth modules to communicate with the central controller.
The demonstration shows robot's autonomous basketball throwing and target hitting capability with high precision.
-----------------------------
SELF-PACED BRAIN-CONTROLLED WHEELCHAIR METHODOLOGY WITH SHARED AND AUTOMATED ASSISTIVE CONTROL
The consistency and reliability of the brain computer interface (BCI) system is often questioned to be safe for controlling a wheelchair as BCIs characteristically experience a low signal-to-noise ratio and low classification accuracy.
Electroencephalogram (EEG) acquired non-invasively consists of multiple time-series which are highly correlated because of volume conduction and ambient noises, thus providing a rather blurred image of the brain activity. This low signal-to-noise ratio and low spatial resolution of the data can degrade the translational performance of the BCI.
To overcome the low classification accuracy and the uncertainty in commands of the BCI systems, the user has to impart additional concentration and time to navigate the wheelchair to the desired location.
This paper presents a brain-controlled wheelchair (BCW) control strategy that reduces the total time required to complete a task and the concentration effort imparted by the user.
Two BCW approaches are investigated in this work; a synchronous BCW and a self-paced BCW. These methodologies involve a shared control methodology between the BCI/user component and the automated assistive control (AAC) component.
The proposed BCW strategies are compared to state-of-the-art BCW control methodologies available in the literature. The results show that the proposed methods not only reduce the concentration time but also provide a safer and reliable control compared to other BCWs.
-----------------------------
AUTOMATED VOICE BASED HOME NAVIGATION SYSTEM FOR THE ELDERLY AND THE PHYSICALLY CHALLENGED
ABSTRACT
In this paper, we propose an Intelligent Home Navigation System (IHNS) which comprises of a wheelchair, voice module and navigation module. It can be used by an elderly or physically challenged person to move inside the home without any difficulty. It's common that the elders forget the way to the different rooms in house and the physically challenged people find it hard to move the wheel chair without external aid.
By making use of IHNS, elderly and the physically challenged can go to different rooms in the house like kitchen, living room, dining room etc by just speaking a word which is predefined to that particular room.
The voice of the person is detected by voice capture module which will be compared by voice recognition module with predefined voices loaded in to the system.
According to the received voice, the destination is automatically understood and the wheelchair moves according to the route which is predefined. It is also equipped with obstacle avoidance technique, where the person may not be able to provide proper voices at the right time.
The wheel chair can automatically navigate from one point to the other in the home as per predefined route based on the voice received. Thus the above proposed system can be used by elderly and physically challenged people in day to day life even if they are alone at home
PATH FOLLOWING SYSTEM OF SMALL UNMANNED AUTONOMOUS VEHICLE FOR SURVEILLANCE APPLICATION
ABSTRACT
A path following flight control is developed to be implemented in a small UAV system. The path following control is designed such that the UAV is able to follow smooth flight-paths within its maneuvering capabilities.
Payload space, weight, and power source constraints dictate the system to be designed with limited application of sensors and actuators, while it is still required to be able to perform its mission within a predefined measures. The control scheme is intended to be able to steer the UAV flight close to a predefined path and control its heading angle accordingly.
The controller principally works by driving the cross-track and course angle errors of the UAV flight, relative to the desired path, to zero, through performing Bank to Turn (BTT) maneuvers. The system generates corrective commands based on the error information and transforms it into a heading change via roll maneuver.
The roll maneuver controller is designed using LQR technique such that it can provide an appropriate roll dynamics of the UAV. Simulation results will be presented and analyzed to investigate the performance of the proposed system.
-----------------------------
HAZARDOUS GAS DETECTING METHOD APPLIED IN COAL MINE DETECTION ROBOT
ABSTRACT
As one of the largest coal production and consumption countries in the world, China is also one of the related accidents occurred frequently countries such as gas explosion, flood, breaking out of fire during the exploitation of coal mine.
Coal Mine Detection Robot can be substituted or partial substituted for emergency workers to enter the mine shaft disaster site and detect hazardous gas and do some environmental exploration and surveying task. Coal Mine Detection Robot uses infra-red spectrum absorption way to detect methane, carbon monoxide and such gas simultaneously.
The principle of gas survey meter of infra-red spectrum is according to the selectively absorption of infrared radiation by the mash gas, CO to achieve the detection of their concentration. The advantages of this kind of hazardous gas detecting are: simultaneously and rapidly detecting methane, CO and high sensitivity, good selectivity and fast response.
Otherwise, it is easy to be taken by robot due to its simple and light structure, have a lager detection range and probe is not easy failure to be poisoning and aging.
-----------------------------
IMPLEMENTATION OF CAN BUS IN AN AUTONOMOUS ALL-TERRAIN VEHICLE
ABSTRACT
The main purpose of this effort is to design an autonomous all terrain vehicle which uses a CAN bus. The paper describes the operation and advantages of the CAN protocol in automobiles. The ATV used for this design is a Honda Four Trax Rancher AT and a brief explanation of the parts in the ATV is provided.
The Renesas RX62N microcontroller is used as a CAN controller which creates a single two wire bus through which electronic control units (ECU) in the automobiles communicate. The working of the CAN protocol on the RX62N has been explained with the help of pseudo code.
-----------------------------
BIOMETRIC ATTENDANCE SYSTEM
ABSTRACT
This research work has application for attendance system of employer's and students in general. The system will facilitate institutions/ organization to make attendance individual in time along with data information thumb impression will be taken as a signature for the system entry. Main design and challenge in this system is the design of database architecture and its business logic.
-----------------------------
AUTOMATED VOICE BASED HOME NAVIGATION SYSTEM FOR THE ELDERLY AND THE PHYSICALLY CHALLENGED
ABSTRACT
In this paper, we propose an Intelligent Home Navigation System (IHNS) which comprises of a wheelchair, voice module and navigation module. It can be used by an elderly or physically challenged person to move inside the home without any difficulty.
It's common that the elders forget the way to the different rooms in house and the physically challenged people find it hard to move the wheel chair without external aid. By making use of IHNS, elderly and the physically challenged can go to different rooms in the house like kitchen, living room, dining room etc by just speaking a word which is predefined to that particular room.
The voice of the person is detected by voice capture module which will be compared by voice recognition module with predefined voices loaded in to the system. According to the received voice, the destination is automatically understood and the wheelchair moves according to the route which is predefined.
It is also equipped with obstacle avoidance technique, where the person may not be able to provide proper voices at the right time. The wheel chair can automatically navigate from one point to the other in the home as per predefined route based on the voice received. Thus the above proposed system can be used by elderly and physically challenged people in day to day life even if they are alone at home.
-----------------------------
A TRANSFORMERLESS MEDIUM-VOLTAGE STATCOM TOPOLOGY BASED ON EXTENDED MODULAR MULTILEVEL CONVERTERS
ABSTRACT
A new transformerless four-leg topology is suggested for shunt compensation, the modular multilevel converters (MMC) based on the half-bridge converters, to achieve higher performance as a STATCOM in a distorted and unbalanced medium-voltage large-current (MV-LC) system.
Further, an extended MMC (EMMC) is proposed in order to manage more accurate compensation for high-power applications. Both proposals can be controlled for various purposes such as reactive power and unbalance compensation, voltage regulation, and harmonic cancellation. Moreover, related control strategies are also suggested for both the MMC and the EMMC to ensure that the source-end three-phase currents are sinusoidal and balanced. Also, the dc-link capacitors of the half-bridge converters are regulated.
One interesting application for the EMMC-based STATCOM could be the improvement in power quality and performance of the electrified railway traction power supply system.
Both the MMC- and the EMMC-based STATCOM along with their proposed control strategies were simulated; further, to verify the suggestions, these proposals were also implemented on a 30-kVA modular laboratory prototype. Experiments and simulations confirm the predefined objectives.
-----------------------------
AN INTEGRATED-CONTROLLED AC/DC INTERFACE FOR MICROSCALE WIND POWER GENERATION SYSTEMS
ABSTRACT
In this paper, a novel ac/dc interface with an integrated controller is proposed for the microscale wind power generation system (WPGS). The proposed interface is mainly composed of a dynamic maximum power point tracking (MPPT) control and a half-controlled single-stage rectifier with an integrated control.
The half-controlled single-stage rectifier is proposed to replace the widely used two-stage converter for improving the current total harmonics distortion (THD) as well as the efficiency. The analytic expressions of the duty ratios for controlling the rectifier are also derived.
Moreover, the dynamic response of the wind turbine and the extracted wind power are enhanced by the integrated dynamic MPPT control. Finally, from the experimental results, it can be seen that the current THD is reduced to around 5%, and the total efficiency is increased by about 12%-15% depending on the wind speed variations.
-----------------------------
AN INTELLIGENT BLIND ROD AND NAVIGATION PLATFORM BASED ON ZIGBEE TECHNOLOGY
ABSTRACT
This article introduces an intelligent blind rod and navigation platform based on ZigBee technology. This blind rod can detect and analyze the situation on road and warn the blind to avoid obstacles by ultrasonic measurement.
The navigation platform based on ZigBee technology can help the blind know different directions the path leads to. This intelligent blind rod can better serve for the blind's independent travel.
-----------------------------
A NOTE ON FINGERPRINT RECOGNITION SYSTEMS
ABSTRACT
Among all the techniques developed for personal authentication, fingerprint recognition system is the most visible one due to its wide range of successful applications in many disciplines such as computer systems security, secure electronic banking, mobile phones, credit cards, secure access to buildings, health and social services, etc. This paper presents a note on fingerprint recognition systems.
-----------------------------
A NEW SINGLE-PHASE SOFT-SWITCHING POWER FACTOR CORRECTION CONVERTER
ABSTRACT
In this paper, single-phase soft-switching power factor correction (PFC) circuit is developed with a new active snubber cell. This active snubber cell provides zero-voltage transition turn ON and zero-current transition turn OFF for the main switch without any extra current or voltage stresses.
Auxiliary switch is turned ON and OFF with zero-current switching (ZCS) without additional voltage stress. Although, there is a current stress on the auxiliary switch, it is decreased by diverting a part of the current to the output side with coupling inductance.
The output current and voltage are controlled by the proposed PFC converter in very wide line and load range. This PFC converter has simple structure, low cost, and ease of control as well.
In this study, a detailed steady-state analysis of the new converter is presented, and this theoretical analysis is verified exactly by 100 kHz and 300 W prototypes. This prototype has 98% total efficiency and 0.99 power factor with sinusoidal current shape.
-----------------------------
A REAL MAXIMUM POWER POINT TRACKING METHOD FOR MISMATCHING COMPENSATION IN PV ARRAY UNDER PARTIALLY SHADED CONDITIONS
ABSTRACT
Conventional popular maximum power point tracking (MPPT) methods are effective under uniform solar irradiance. However, under solar irradiance mismatching conditions [partially shaded conditions (PSCs)], these MPPTs can fail for real MPPT (RMPPT), because multiple local maxima can be exhibited on the power-voltage characteristic curve.
Although some researchers have worked on RMPPT under partial shading conditions, the methods have some drawbacks in terms of complexity and requirements for additional circuits, etc. In this paper, a novel MPPT method capable of RMPPT under PSCs is proposed.
The performance of the proposed MPPT method is analyzed according to the RMPP position and is verified by simulation and experimental results.
-----------------------------
A MINIMUM POWER-PROCESSING-STAGE FUEL-CELL ENERGY SYSTEM BASED ON A BOOST-INVERTER WITH A BIDIRECTIONAL BACKUP BATTERY STORAGE
ABSTRACT
When low-voltage unregulated fuel-cell (FC) output is conditioned to generate ac power, two stages are required: a boost stage and an inversion one. In this paper, the boost-inverter topology that achieves both boosting and inversion functions in a single stage is used to develop an FC-based energy system that offers high conversion efficiency, low-cost, and compactness.
The proposed system incorporates additional battery-based energy storage and a dc-dc bidirectional converter to support instantaneous load changes. The output voltage of the boost-inverter is voltage-mode controlled and the dc-dc bidirectional converter is current-mode controlled.
The load low-frequency current ripple is supplied by the battery, which minimizes the effects of such ripple being drawn directly from the FC itself. Analysis, simulation, and experimental results are presented to confirm the operational performance of the proposed system.
-----------------------------
A HIGH POWER DENSITY SINGLE-PHASE PWM RECTIFIER WITH ACTIVE RIPPLE ENERGY STORAGE
ABSTRACT
It is well known that single-phase pulse width modulation rectifiers have second-order harmonic currents and corresponding ripple voltages on the dc bus. The low-frequency harmonic current is normally filtered using a bulk capacitor in the bus, which results in low power density.
However, pursuing high power density in converter design is a very important goal in the aerospace applications. This paper studies methods for reducing the energy storage capacitor for single-phase rectifiers.
The minimum ripple energy storage requirement is derived independently of a specific topology. Based on the minimum ripple energy requirement, the feasibility of the active capacitor's reduction schemes is verified.
Then, we propose a bidirectional buck-boost converter as the ripple energy storage circuit, which can effectively reduce the energy storage capacitance. The analysis and design are validated by simulation and experimental results.
-----------------------------
INTELLIGENT ONLINE MEASUREMENT AND MANAGEMENT OF ENERGY METER DATA THROUGH ADVANCED WIRELESS NETWORK
ABSTRACT
Recently the Electrical supply companies are trying to adopt the electronic measurement of energy consumption data because of reduced manufacturing cost, improved measurement accuracy, increased timely information, miniature size and many other benefits that go well beyond the traditional rotor-plate energy meter type.
In this paper with the help of an energy chip, an improved energy metering solution is developed, where automating the progression of measurement through digital wireless communication technique is adopted to get the above benefits along with smooth control. The developed energy meter calculates the total average active power mainly for residential consumers.
The hardware circuit accepts single phase voltage and currents as its inputs and provides the output in the form of logic data proportional to the average real power.
This data is fed to a remote computer server through the wireless ZigBee network that represents the concept of distant wireless metering, practically involving no manpower. This paper also presents a software solution developed for total electrical energy billing and data management system.
-----------------------------
HYBRID WIRELESS COMMUNICATION SYSTEM USING ZIGBEE AND WIFI TECHNOLOGY IN THE COALMINE TUNNELS
ABSTRACT
Wireless Sensor Network (WSN) used under the coalmine tunnel is an emerging area of research that promises to provide reliable and flexible communication. This paper first discussed the best working frequency about the WSN in coalmine.
Then, according to the actual circumstances of coal mine, the network structure should adopt cluster-tree topology. We also develop a multifunction communication wireless system using ZigBee and WiFi technology, which can achieve the functions of gas monitoring, wireless communication, personnel management and video surveillance, etc.
Practical applications showed that the multifunction communication system can satisfy the need of dispatch communication and safety monitor in the coal mine tunnel.
-----------------------------
FAULT-TOLERANT TORQUE CONTROL OF BLDC MOTORS
ABSTRACT
Fault tolerance is critical for servomotors used in high-risk applications, such as aerospace, robots, and military. These motors should be capable of continued functional operation, even if insulation failure or open-circuit of a winding occur.
This paper presents a fault-tolerant (FT) torque controller for brushless dc (BLdc) motors that can maintain accurate torque production with minimum power dissipation, even if one of its phases fails. The distinct feature of the FT controller is that it is applicable to BLdc motors with any back-electromotive-force waveform.
First, an observer estimates the phase voltages from a model based on Fourier coefficients of the motor waveform. The faulty phases are detected from the covariance of the estimation error. Subsequently, the phase currents of the remaining phases are optimally reshaped so that the motor accurately generates torque as requested while minimizing power loss subject to maximum current limitation of the current amplifiers.
Experimental results illustrate the capability of the FT controller to achieve ripple-free torque performance during a phase failure at the expenses of increasing the mean and maximum power loss by 28% and 68% and decreasing the maximum motor torque by 49%.
-----------------------------
FINGERID: A NEW SECURITY MODEL BASED ON FINGERPRINT RECOGNITION FOR DISTRIBUTED SYSTEMS
ABSTRACT
The current practice of password based security for distributed systems in general and the Internet in particular is inadequate. Besides, remembering a plethora of long passwords and pass phrases sometimes as many as 15 or 20 is cumbersome.
This raises the need to introduce a better and more reliable authentication mechanism which is not dependent on a series of characters, but rather on a technology that is unique and only possessed by the individual. Similar services already exist, and they are good in some situations, but prove to be inadequate under other circumstances.
Overall, three main requirements of the everyday Internet user remain unaddressed – freedom from memorizing many passwords and pass phrases; convenience and ease of use; and security.
The present paper attempts to offer an answer to all these problems by just one solution, named FingerID. The contribution of this study is of considerable significance, as it would revolutionize the way Internet security is managed.
-----------------------------
HIGH-EFFICIENCY REGULATION METHOD FOR A ZERO-CURRENT AND ZERO-VOLTAGE CURRENT-FED PUSH–PULL CONVERTER
ABSTRACT
A new high-efficiency regulation method for a zero-current and zero-voltage current-fed push-pull converter is presented. The method proposed is based on the use of a controlled transformer as a post-regulator, which adds or subtracts an additional voltage to the output filter of the converter.
An auxiliary regulator, which only handles a percentage of the output power, controls this transformer, and therefore, results in much higher efficiency than a normal preregulator would have. The novelty of the presented converter is that regulation is achieved without affecting the zero-voltage and zero-current switching in any working conditions.
Small- and large-signal models of the converter have been developed and a low-power prototype has been simulated and implemented. The good agreement, between the experimental simulations and theoretical results, validates the theoretical developments.
-----------------------------
DYNAMIC MODELING AND ENERGY CONSUMPTION ANALYSIS OF CRAB WALKING OF A SIX-LEGGED ROBOT
ABSTRACT
The superior terrain adaptability and maneuverability characteristics of multi-legged robots compared to wheeled or tracked vehicles for off-road locomotion motivated the development of six-legged walking robots.
Six-legged robot might be used for locating and disarming bombs, extinguishing fires, underground mining to recover natural resources, explorations of ocean floors and planets, and others, where a human cannot sustain or which would be dangerous for him/her. However, with today’s technologies, the legged systems have the disadvantages of pay load to weight ratio, and poor energy efficiency.
An autonomous walking robot cannot function satisfactorily with a poor energy efficiency, due to the fact that it has to carry all driving and control units in addition to payload and trunk body. Long duration missions are also subjected to power supply constraints.
The minimization of energy consumption plays a key role in the design of an autonomous multi-legged robot. Various approaches are available in the literature to obtain energy-efficient gaits of multi-legged robots
-----------------------------
DEVELOPMENT ON GAS LEAK DETECTION AND LOCATION SYSTEM BASED ON WIRELESS SENSOR NETWORKS
ABSTRACT
Develops a gas leak detection and location system for the production safety in Petrochemical Industry. The system is based on Wireless Sensor Networks (WSN), it can collect the data of monitoring sites wirelessly and sent to the computer to update values in the location software.
Consequently, it can give a real-time detective of the potential risk area, collect the data of a leak accident and locate the leakage point. However the former systems can not react in time, even can not obtain data from an accident and locate accurately.
The paper has three parts, first, gives the overall system design, and then provides the approaches on both hardware and software to achieve it.
-----------------------------
BRAIN-ACTUATED HUMANOID ROBOT NAVIGATION CONTROL USING ASYNCHRONOUS BRAIN-COMPUTER INTERFACE
ABSTRACT
Brain-actuated robotic systems have been proposed as a new control interface to translate different human intentions into appropriate motion commands for robotic applications. This study proposes a brain-actuated humanoid robot navigation system that uses an EEG-BCI.
The experimental procedures consisted of offline training sessions, online feedback test sessions, and real-time control sessions. During the offline training sessions, amplitude features from the EEGs were extracted using band power analysis, and the informative feature components were selected using the Fisher ratio and the linear discriminant analysis (LDA) distance metric.
The Intentional Activity Classifier (IAC) and the Motor Direction Classifier (MDC) were hierarchically structured and trained to build an asynchronous BCI system.
During the navigation experiments, the subject controlled the humanoid robot in an indoor maze using the BCI system with real-time images from the camera on the robot's head. The results showed that three subjects successfully navigated the indoor maze using the proposed brain-actuated humanoid robot navigation system.
-----------------------------
CONTROLLING HUMAN ATTENTION THROUGH ROBOT'S GAZE BEHAVIORS
ABSTRACT
Controlling someone's attention can be defined as shifting his/her attention from the existing direction to another. However, it is not easy task for a robot to shift a particular human's attention if they are not in face-to-face situation.
If the robot would like to communicate a particular person, it should turn its gaze to that person and make eye contact to establish mutual gaze. However, only such a turning action is not enough to set up eye contact when the robot and the target person are not facing each other.
Therefore, the robot should perform some actions so that it can attract the target person and meet their gaze. In this paper, we present a robot that can attract a target person's attention by moving its head, make eye contact through showing gaze awareness by blinking its eyes, and establish joint attention by repeating its head turns from the person and the target object.
Experiments using twenty human participants confirm the effectiveness of the robot actions to control human attention
-----------------------------
DESIGN AND DEVELOPMENT OF A HAND-GLOVE CONTROLLED WHEEL CHAIR
ABSTRACT
Wheelchairs are a way of reincarnating the purpose of life in the lives of disabled people. Effective and efficient ways of delivering a cost-effective and affordable wheelchair to the common masses, which is not only at par with the present day technology, but is much easier to use are presented herewith.
Replacement of the popular joystick stick controlled wheel chair with a hand-glove control system for easier maneuvering by bending the fingers, is discussed in this paper. Intended users control the system by wearing an instrumented glove fitted with flex or bend sensors for controlling the movement and direction of the wheelchair.
Uni-directional wireless communication exists between the instrumented gloves and the controller which is sandwiched between the user's seat and the wheels. Initial design results are also presented in this paper.
The technologies presented in this paper suggest a wide domain of possibilities to a wide variety of users. In addition, it also aims at making a cost-effective chair so that more hi-tech wheelchairs are made use of, widely, by people with disabilities.
DESIGN AND DEVELOPMENT OF THE WIRELESS SENSOR NODE FOR TRAFFIC FLOW SURVEILLANCE
ABSTRACT
Wireless sensor network is expected to be deployed in intersection to monitor the traffic flow continuously, and the monitoring data can be used as the foundation of traffic light control.
In this paper, a traffic information and transmission system based on Zigbee and wireless sensor network is built, and the sensor nodes used in traffic flow surveillance are developed. Structure, hardware and work flow of WSN nodes are designed.
The stability experiment and the actual environment experiment are carried out in the last of the paper. The results of experiments show that WSN has the ability to collect traffic flow information quickly and transmit the datum to the processing center in real time.
-----------------------------
DESIGN AND IMPLEMENTATION OF AN INTELLIGENT VEHICLE DRIVING CONTROLLER
ABSTRACT
The goal of this paper is to implement the control and design of an intelligent vehicle based on an embedded DSP platform (eZdsp™ F2812). The overall system including steering wheel AC serve motor, brake actuator, throttle driving circuit and the sensors are equipped in a golf-car as a platform.
Otherwise, digital image processing technology is used to realize the autonomous driving system which can achieve multi-mode of lane-keeping, lane-change and obstacle-avoidance, the overall system has been examined on campus roads.
-----------------------------
DESIGN AND IMPLEMENTATION OF PYROELECTRIC INFRARED SENSOR BASED SECURITY SYSTEM USING MICROCONTROLLER
ABSTRACT
This paper evaluates the development of a Low-cost security system using small PIR (Pyroelectric Infrared) sensor built around a microcontroller. The low-power PIR detectors take advantage of pyroelectricity to detect a human body that is a constant source of Passive Infrared (radiation in the infrared region).
The system senses the signal generated by PIR sensor detecting the presence of individuals not at thermal equilibrium with the surrounding environment. Detecting the presence of any unauthorized person in any specific time interval, it triggers an alarm & sets up a call to a predefined number through a GSM modem.
This highly reactive approach has low computational requirement, therefore it is well-suited to surveillance, industrial applications and smart environments. Tests performed gave promising results.
-----------------------------
THE IMPLEMENTATION OF THE INTELLIGENT TRANSPORT SYSTEM FOR THE REAL-TIME ROADSIDE ENVIRONMENT INFORMATION TRANSFER
ABSTRACT
The paper proposed a novel system “RTCS (Real-Time Control System for road environment)” to prevent accidents of drivers. This paper deployed sensors on roads and used these sensors to collect information to coordinators. How to use sensors to prevent accidents in vehicular environment is an interesting issue.
Vehicles are equipped with OBU (On-Board Unit) and use the OBU to query information if the coordinator or RSU (Road-Side Unit) is located in its communication range. This system also distributed events into different priority due to the different damages.
For your example, RSU collects and analyzes the roadside information for the driver's safety and which provides to an OBU and a management system according to the service priority. In the higher rank terminal, the developed IP-based set-top box application provides information such as the traffic information, road environmental information, environmental sensor station error, and etc.
The system has a high potential to improve traffic in two ways. First, it collects local environmental data and passes it to a central facility to further process it and pass it to vehicles. Second, it takes care that urgent local information is passed directly and thus quickly to local vehicles which increases traffic safety.
The paper presents architecture to connect a USN (Ubiquitous Sensor Network) with the ITS (Intelligent Transport System) consisting of connected OBU and RSU. The goal of the system is to provide the ITS with local environmental data gathered by the USN nodes.
-----------------------------
THE INTELLIGENT EMBEDDED CONTROL WARNING SYSTEM FOR CAR REVERSING
ABSTRACT
Most of the car drivers used the reverse radar or a reverse camera to detect the road situation behind the vehicle when it is engaged in reverse gear. As a matter of fact, the pedestrians can virtually know if the vehicle is backing up or not only by seeing the permanent bright reverse lamps. And as there is not much change with the reverse lamp to be seen, therefore their warning function for pedestrians seems to be still insufficient eventually.
Therefore, this research tries to design a set of embedded intelligent car backup warning system so as to promote the safety of the walkers or the other drivers on the road. This embedded system uses Microsoft Win CE operating system and matches with the Mini2440 developing board. It also uses the Visual Studio 2005 for developing the intelligent touch panel operating mode.
The UART interface on the Mini 2440 developing board controls the frequency converter, RC server and LED by using PIC16F877 to transform the signal of the sensors. And then, connecting to the sensors of angle, luminosity and distance so as to read the voltage value of the sensor and transferring them into actual values and followed by using 27 fuzzy logic rules to carry on the fuzzy logic deduction.
And the angle of the LED reverse lamp bracket is adjusted and driven automatically according to the results of this logic deduction eventually. This research tries to do the simulated test by using a mobile frame in the same height as a real automobile. To let the test mobile frame being located 240 cm away from the obstacle and then start the driven motor and set the frequency of it to be with 60 Hz. (in other words, its speed is approximately in 2.52 Km/h.) the let the test mobile frame to stop at 40 cm in front of the obstacle.
We found out that the warning lamp bracket installation angle will be changed correspondently with the distance between test mobile frame and obstacle and being declined automatically from 90 degree to 0 degree. Apparently, from th- - e test results, it has been proven that this system can reach the goal of automatically controlled car back-up warning function truly.
-----------------------------
THE RESEARCH ON ZIGBEE-BASED MINE SAFETY MONITORING SYSTEM
ABSTRACT
In this paper the research method of Mine Safety Monitoring System based on ZigBee is elaborated, and the hardware design of ZigBee sensor node and system software design are discussed. The self-organizing routing algorithm for ZigBee networks and the gateway design and systems integration are also studied.
ZigBee-based Mine Safety Monitoring System can achieve a variety of safety factors of production, and underground environment (such as gas, temperature, humidity and other environmental indicators) for monitoring, controlling mine production, safety management to provide a good basis for decision making.
-----------------------------
THE TEMPERATURE HUMIDITY MONITORING SYSTEM OF SOIL BASED ON WIRELESS SENSOR NETWORKS
ABSTRACT
This design uses a wireless sensor network as information acquisition and processing platform. The coverage is big, effectively resolves the disadvantages of wired communications.
Adopting the technology of wireless sensor network based on Zigbee, GPRS and Web Services technology, we design a set of low cost, low power consumption, flexible automatic networking temperature humidity monitoring system of soil.
And the system is a complete set of wireless sensor network induction, acquisition, storage, application, reporting, solution, has a good man-computer exchange interface.
Through commissioning in the demonstration base of soybean in Northeast Agricultural University, it shows that the system can meet the requirements of the temperature and humidity of soil environmental monitoring and unified management.
-----------------------------
THREE-PHASE TO SINGLE-PHASE POWER-CONVERSION SYSTEM
ABSTRACT
A power-conversion system for converting three-phase power into single-phase power is proposed in this paper. The proposed three-phase to single-phase (3f/1f) power-conversion system comprises a power converter, a zero-sequence transformer set, and a filter capacitor.
The output currents of the power converter are divided into two parts. One is a set of positive-sequence sinusoidal currents, whose phases are in phase with the voltages of the three-phase power source. The positive-sequence sinusoidal currents are employed to absorb a real power from the three-phase power source.
In addition, the power converter can perform the functions of three-phase balance, low harmonic distortion, and unity power factor when the single-phase load is used. The other is a set of zero-sequence currents, which will pass through the zero-sequence transformer set and build a single-phase voltage with high power quality for the single-phase load.
Since the proposed 3f/1f power-conversion system contains only one power converter, it has the advantages of simplifying both the power circuit and control circuit. A prototype is developed and tested to demonstrate the performance of the proposed 3f/1f power-conversion system.
The experimental results show that the proposed system can achieve the expected performance.
------------------------------
THE DESIGN OF THE SCENE OF THE ACCIDENT ALARM SYSTEM BASED ON ARM AND GPS
ABSTRACT
This system designs the scene of the accident alarm system based on ARM and GPS. When the accident occurred , the manual and automatic alarm can be realized.
Vehicles state and user information as well as alarm locations will be transmitted to the Pre-set of treatment centre; after receiving related alarming information, the treatment centre will display this information on its map.
After receiving alarm information, the treatment Centre staffs who are on duty will notice the handler who is the nearest to the scene of the accident in time, in order to reach the scene of accident in the first time, and gain more treatment time for the accident injured, and lower the accident mortality, as well as reduce incidents impacting time on the traffic.
------------------------------
THE FLEXIBLE BUS SYSTEMS USING ZIGBEE AS A COMMUNICATION MEDIUM
ABSTRACT
This paper describes a research on The Flexible Bus Systems (FBS) using Zigbee as a communication medium. The Flexible Bus System is a demand responsive transit (DRT) but it is more efficient and convenient in a sense that it entertains passenger's demands and gives bus locations in real time.
The real time synchronization of The Flexible Bus System makes it information rich and unique as compared to other DRTs. The Flexible Bus Systems is a system that can replace the Traditional Bus Systems with its flexibility and efficiency.
This paper discusses the use of wireless technologies in The Flexible Bus Systems and how to make it more reliable using short range wireless technology Zigbee.
------------------------------
INTERLEAVED SOFT-SWITCHING BOOST CONVERTER FOR PHOTOVOLTAIC POWER-GENERATION SYSTEM
ABSTRACT
In this paper, a interleaved soft switching boost converter (ISSBC) for a photovoltaic (PV) power-generation system is proposed.
The topology used raises the efficiency for the dc/dc converter of the PV power conditioning system (PVPCS), and it minimizes switching losses by adopting a resonant soft-switching method. A detailed mode analysis of the proposed topology is presented.
The feasibility of the proposed topology is experimentally verified for a 1.2-kW prototype. The experimental results imply that 97.28% efficiency is achieved under the full-load condition. Consequently, it is confirmed that the overall efficiency is increased by about 1.5% compared with the conventional hard switching interleaved boost converter.
------------------------------
MPPT BASED STAND-ALONE WATER PUMPING SYSTEM
ABSTRACT
Renewable energy sources are becoming a viable substitute for conventional energy sources due to increases in world's energy demand and scarce resources.
Solar pump operated with AC drive offer better choice in terms of size, ruggedness, efficiency and maintainability. In this work, dc power from solar panel is boosted and fed to an inverter which gives ac output. Inverter drives the motor coupled to the water pump.
To get the maximum power available at any instant an MPPT controller is used to control the converter. Of different types of MPPT algorithms artificial intelligence (AI) techniques are popular. Artificial neural networks (ANNs) & fuzzy logic (FL) two different types of AI techniques that are used to design the MPPT controller for PV system.
In this proposed work, depending on solar radiation and temperature, the MPPT controller gives optimized duty cycle. Neural network and fuzzy logic are two MPPT controllers, simulated to give optimum duty cycle. These MPPT controllers are compared based on the power obtained from the boost converter. Simulation results are also presented.
MULTIPHASE DC–DC CONVERTERS USING A BOOST-HALF-BRIDGE CELL FOR HIGH-VOLTAGE AND HIGH-POWER APPLICATIONS
ABSTRACT
In this paper, multiphase dc-dc converters are proposed for high-voltage and high-power applications. A generalized converter is configured such that the boost-half-bridge (BHB) cells and voltage doublers are connected in parallel or in series to increase the output voltage and/or the output power.
In addition to reduced device voltage and current ratings by the connection, the proposed converter has the following features: high-step-up voltage gain with significantly reduced transformer turn ratio, low-input current ripple due to interleaving effect, zero-voltage switching turn-ON of switches and zero-current switching turn-OFF of diodes, no additional clamping and start-up circuits required, high-component availability and easy thermal distribution due to the use of multiple small components, and flexibility in device selection resulting in optimized design.
A design guideline of determining the optimum circuit configuration for given output voltage and power level is presented. Experimental results are also provided to validate the proposed concept.
------------------------------
ONLINE VOTING SYSTEM POWERED BY BIOMETRIC SECURITY USING STEGANOGRAPHY
ABSTRACT
Using Cryptography and Steganography at the same time, we try to provide Biometric as well as Password security to voter accounts. The scheme uses images as cover objects for Steganography and as keys for Cryptography. The key image is a Biometric measure, such as a fingerprint image.
Proper use of Cryptography greatly reduces the risks in these systems as the hackers have to find both secret key and the template. The basic idea is to merge the secret key with the cover image on the basis of key image.
The result of this process produces a stego image which looks quite similar to the cover image but not detectable by human eye. The system targets the authentication requirement of a voting system.
------------------------------
PERFORMANCE OF A HIGH-EFFICIENCY SWITCHED-CAPACITOR-BASED RESONANT CONVERTER WITH PHASE-SHIFT CONTROL
ABSTRACT
This paper presents operating performance of a switched-capacitor-based resonant converter (SCRC) using a phase-shift control method. The proposed phase-shift control realizes zero-voltage switching operation, and thus achieves a high-conversion efficiency.
A theoretical analysis shows that the SCRC can reduce its inductor volume compared with a conventional buck converter when the output voltage range is within 19%-81% of its input voltage.
Experimental results verify the operating characteristics of the proposed method and show the improved conversion efficiency of more than 99%.
------------------------------
PROTECTION AND CONTROL OF LOW VOLTAGE MOTORS USED IN INDUSTRIAL APPLICATIONS
ABSTRACT
As low voltage motors are critical assets in today's industrial applications this paper will review the applications of microprocessor-based protection and control on low voltage motors less than 600 V AC in industrial facilities.
It will review principles of low voltage motor protection (thermal overload, ground fault, unbalance, etc.). In addition, the paper will discuss the starting control of low voltage motors and review the different starting types (Full Voltage Non-Reversing, Full Voltage Reversing, Two Speed, Wye-Delta, Inverter, Soft Starter). Communications play a key role in the starting and stopping of low voltage motors.
This paper will also discuss several different starting/stopping controls using communication protocols, such as Profibus, DeviceNet and Modbus.
------------------------------
REAL TIME PADDY CROP FIELD MONITORING USING ZIGBEE NETWORK
ABSTRACT
Sensors are the essential device for precision agricultural applications. In this paper we have detailed about how to utilize the sensors in paddy crop field area and explained about Wireless Sensor Network (WSN), Zigbee network, Protocol stack, zigbee Applications and the results are given, when implemented the zigbee network experimentally in real time environment.
This paper proposed idea about monitoring the crop field area without human interaction. The fundamental concept of this paper is to provide a highly enabled monitoring of crop field. This paper is focus on the sensing and monitoring of the crop field and gives various sensing analyzes in the paddy crop field.
------------------------------
REMOTE MONITORING AND CONTROL OF PHOTOVOLTAIC SYSTEM USING WIRELESS SENSOR NETWORK
ABSTRACT
Efficient energy yield is a major concern in photovoltaic systems in solar energy supply. Smart photovoltaic modules offer a potential solution to allow solar generators to maximize their productivity.
This paper describes details of the design and instrumentation of smart photovoltaic modules, a wireless sensor network, and software for real-time sensing and control of a photovoltaic system with maximum power point tracking at module level.
Field condition is monitored by voltage, current, irradiance, and temperature sensors distributed across the photovoltaic field. The sensory data are periodically sampled and transmitted to a base station. The power point is controlled by a integrated DC-DC converter.
The output voltage in the converter is regulated by a digital controller. The reference voltage is calculated based on a neural network model, which is used to identify maximum power point.
The communication data for remote monitoring and distributed control are successfully transmitted using a low-cost ZigBee wireless network. The web-based software developed in this paper offers stable remote access to field conditions and real-time control of the power points in the smart photovoltaic system.
------------------------------
RFID AND ZIGBEE BASED MANUFACTURING MONITORING SYSTEM
ABSTRACT
Traditional methods of monitoring production in enterprises by humans on site are unable to meet the expectations for efficiency, accuracy and cost as product lifecycles are shortened continuously.
Setting up an RFID and ZigBee based manufacturing monitoring system is a good approach to improve monitoring efficiency so as to improve management efficiency in enterprises.
Although there are still some problems to be solved for RFID and ZigBee technologies, their unique features still make the monitoring system based on them a promising system in manufacturing enterprises. The architecture of the RFID and ZigBee based monitoring system is presented in this paper.
-----------------------------
SINGLE-PHASE BACK-TO-BACK CONVERTER FOR ACTIVE POWER BALANCING, REACTIVE POWER COMPENSATION, AND HARMONIC FILTERING IN TRACTION POWER SYSTEM
ABSTRACT
An active power compensator (APC) based on single-phase back-to-back power converter is proposed in this paper to solve problems of power quality of electric railway power supply system. This system adopts a single-phase feeding connection, which is called cophase power supply scheme.
In this scheme, APC connects the balance transformer between feeding phase for power supply and another phase for compensation. It has some characteristics, such as active power balancing, reactive power compensating, and harmonics filtering. In order to achieve these characteristics, the control scheme requires seven combination models. In this paper, a multifunctional control algorithm is proposed to realize every conceivable model.
A cophase system with APC based on field programmable gate array (FPGA) and YNvd balance transformer is also designed and evaluated. The experimental results obtained from this prototype illustrate that the compensating ability is extremely high in steady-state and dynamic responses, and the power quality of a substation with distorted loads can be improved integrally.
------------------------------
THE DESIGN OF THE SCENE OF THE ACCIDENT ALARM SYSTEM BASED ON ARM AND GPS
ABSTRACT
This system designs the scene of the accident alarm system based on ARM and GPS. When the accident occurred , the manual and automatic alarm can be realized.
Vehicles state and user information as well as alarm locations will be transmitted to the Pre-set of treatment centre; after receiving related alarming information, the treatment centre will display this information on its map.
After receiving alarm information, the treatment Centre staffs who are on duty will notice the handler who is the nearest to the scene of the accident in time, in order to reach the scene of accident in the first time, and gain more treatment time for the accident injured, and lower the accident mortality, as well as reduce incidents impacting time on the traffic.
-----------------------------
HIGH-EFFICIENCY REGULATION METHOD FOR A ZERO-CURRENT AND ZERO-VOLTAGE CURRENT-FED PUSH–PULL CONVERTER
ABSTRACT
A new high-efficiency regulation method for a zero-current and zero-voltage current-fed push-pull converter is presented. The method proposed is based on the use of a controlled transformer as a post-regulator, which adds or subtracts an additional voltage to the output filter of the converter.
An auxiliary regulator, which only handles a percentage of the output power, controls this transformer, and therefore, results in much higher efficiency than a normal preregulator would have. The novelty of the presented converter is that regulation is achieved without affecting the zero-voltage and zero-current switching in any working conditions.
Small- and large-signal models of the converter have been developed and a low-power prototype has been simulated and implemented. The good agreement, between the experimental simulations and theoretical results, validates the theoretical developments.
------------------------------
FAULT-TOLERANT TORQUE CONTROL OF BLDC MOTORS
ABSTRACT
Fault tolerance is critical for servomotors used in high-risk applications, such as aerospace, robots, and military. These motors should be capable of continued functional operation, even if insulation failure or open-circuit of a winding occur.
This paper presents a fault-tolerant (FT) torque controller for brushless dc (BLdc) motors that can maintain accurate torque production with minimum power dissipation, even if one of its phases fails. The distinct feature of the FT controller is that it is applicable to BLdc motors with any back-electromotive-force waveform.
First, an observer estimates the phase voltages from a model based on Fourier coefficients of the motor waveform.
The faulty phases are detected from the covariance of the estimation error. Subsequently, the phase currents of the remaining phases are optimally reshaped so that the motor accurately generates torque as requested while minimizing power loss subject to maximum current limitation of the current amplifiers.
Experimental results illustrate the capability of the FT controller to achieve ripple-free torque performance during a phase failure at the expenses of increasing the mean and maximum power loss by 28% and 68% and decreasing the maximum motor torque by 49%.
DYNAMIC MODELING AND ENERGY CONSUMPTION ANALYSIS OF CRAB WALKING OF A SIX-LEGGED ROBOT
ABSTRACT
In this paper, an attempt has been made to develop a detailed dynamic model of a realistic six-legged robot during its crab motion. An energy consumption model has been derived for statically stable wave-crab gaits after considering a minimum of dissipating energy for optimal feet forces distributions.
Two approaches, such as minimization of norm of feet forces and minimization of norm of joint torques have been developed. The performances of these approaches have been compared with each other for different values of duty factor.
The effects of walking parameters, namely velocity, stroke, duty factor and crab angle are studied on energy consumption during crab walking. Wave gait with a lower duty factor is found to be more energy-efficient compared to that with the higher duty factor at the highest possible velocity.
------------------------------
DEVELOPMENT ON GAS LEAK DETECTION AND LOCATION SYSTEM BASED ON WIRELESS SENSOR NETWORKS
ABSTRACT
Develops a gas leak detection and location system for the production safety in Petrochemical Industry. The system is based on Wireless Sensor Networks (WSN), it can collect the data of monitoring sites wirelessly and sent to the computer to update values in the location software.
Consequently, it can give a real-time detective of the potential risk area, collect the data of a leak accident and locate the leakage point. However the former systems can not react in time, even can not obtain data from an accident and locate accurately.
The paper has three parts, first, gives the overall system design, and then provides the approaches on both hardware and software to achieve it.
-----------------------------
VOICE OVER ZIGBEE NETWORKS WITH ENVIRONMENTAL MONITORING
ABSTRACT
ZigBee technology is being embedded in a range of applications up to smart energy, healthcare, and telecommunication services. In this paper, we present a voice transmission system, one of telecommunication value-added services, based on the low-rate ZigBee networks.
We design a model to perform a sensor role as a member of ZigBee networks in addition to providing the cost-effective voice transmission function.
------------------------------
VOICE RECOGNITION BASED WIRELESS HOME AUTOMATION SYSTEM
ABSTRACT
Home Automation industry is growing rapidly; this is fuelled by the need to provide supporting systems for the elderly and the disabled, especially those who live alone. Coupled with this, the world population is confirmed to be getting older.
Home automation systems must comply with the household standards and convenience of usage. This paper details the overall design of a wireless home automation system (WHAS) which has been built and implemented.
The automation centres on recognition of voice commands and uses low-power RF ZigBee wireless communication modules which are relatively cheap. The home automation system is intended to control all lights and electrical appliances in a home or office using voice commands. The system has been tested and verified.
The verification tests included voice recognition response test, indoor ZigBee communication test, and the compression and decompression tests of DPCM (Differential Pulse Code Modulation) speech signals. The tests involved a mix of 35 male and female subjects with different English accents. 35 different voice commands were sent by each person. Thus the test involved sending a total of 1225 commands and 79.8% of these commands were recognised correctly.
------------------------------
A GSM, INTERNET AND SPEECH CONTROLLED WIRELESS INTERACTIVE HOME AUTOMATION SYSTEM
ABSTRACT
The home automation today needs to make use of the latest technological components available. In this paper, we present the design and implementation of a home automation system where communication technologies GSM (Global System for Mobile Communication), Internet, and speech recognition have been used.
All these techniques are successfully merged in a single wireless home automation system. This system offers a complete, low cost, powerful and user friendly way of real-time monitoring and remote control of a house
VOLTAGE-SOURCE PWM RECTIFIER–INVERTER BASED ON DIRECT POWER CONTROL AND ITS OPERATION CHARACTERISTICS
ABSTRACT
This paper describes a novel control strategy of direct power-control-based voltage-source pulsewidth modulation (PWM) rectifier-inverter. The key of this strategy is direct selection of a switching state of the PWM rectifier-inverter on basis of instantaneous power errors.
A relationship between the instantaneous power and the switching state of the PWM rectifier-inverter is theoretically analyzed, which is essential to compose a switching-state table. Effectiveness of the proposed technique is examined through several experimental tests, using a 1.6-kW prototype.
As a result, unity power factor operation is achieved by the proposed method, and the output currents are confirmed to be sinusoidal waveforms without large distortion under balanced and unbalanced power-source condition.
------------------------------
ZIGBEE ELECTRIC VEHICLE CHARGING SYSTEM
ABSTRACT
This paper presents a Information system for ZigBee Energy Dispenser (ZED), with onsite Charging Hotspot subsystem (Z-key, Z-Charger and Data Hub) and backend Web portals subsystem (i-Plug), over wireless transmission by using ZigBee module and wired transmission on internet network.
ZED is an AMI solution dedicated to electrical vehicle charging for both private and public car parks. It is a platform which aimed to coordinate the data flow among customer, Utility information system (e.g MDMS, billing) and Charging Hotspot.
------------------------------
ZIGBEE/GPS TRACKING SYSTEM FOR ROWING RACES
ABSTRACT
In this paper a ZigBee/GPS Tracking System for Rowing Races is presented. The system provides real-time monitoring of boat position. Potential applications includes, race monitoring, aided-training and safety systems.
The system is composed of two main types of modules, Mobile Units equipped with a GPS receiver (in the boat), and a fixed one composed by the Central Unit and the Race Manager, located in the operations room.
The communication between the Central and the Mobile units is provided by a point to multipoint ZigBee wireless network. At the current development stage a system prototype was developed and used for testing purposes. Preliminary tests, in order to make a first assessment of system functionalities, were performed in a simulated land environment and the obtained results were promising.
------------------------------
HYBRID WIRELESS COMMUNICATION SYSTEM USING ZIGBEE AND WIFI TECHNOLOGY IN THE COALMINE TUNNELS
ABSTRACT
Wireless Sensor Network (WSN) used under the coalmine tunnel is an emerging area of research that promises to provide reliable and flexible communication. This paper first discussed the best working frequency about the WSN in coalmine.
Then, according to the actual circumstances of coal mine, the network structure should adopt cluster-tree topology. We also develop a multifunction communication wireless system using ZigBee and WiFi technology, which can achieve the functions of gas monitoring, wireless communication, personnel management and video surveillance, etc.
Practical applications showed that the multifunction communication system can satisfy the need of dispatch communication and safety monitor in the coal mine tunnel.
-----------------------------
SENSORLESS VECTOR CONTROL OF INDUCTION MOTORS AT VERY LOW SPEED USING A NONLINEAR INVERTER MODEL AND PARAMETER IDENTIFICATION
ABSTRACT
The performance of vector-controlled induction motor drives without a speed sensor is generally poor at very low speed. The reasons are offset and drift components in the acquired feedback signals, voltage distortions caused by the nonlinear behavior of the switching converter, and the increased sensitivity against model parameter mismatch.
New modeling and identification techniques are proposed to overcome these problems. A pure integrator is employed for stator flux estimation which permits high-estimation bandwidth. Compensation of the drift components is done by offset identification.
The nonlinear voltage distortions are corrected by a self-adjusting inverter model. A further improvement is a novel method for online adaptation of the stator resistance. Experiments demonstrate smooth steady-state operation and high dynamic performance at extremely low speed.
------------------------------
INTELLIGENT ONLINE MEASUREMENT AND MANAGEMENT OF ENERGY METER DATA THROUGH ADVANCED WIRELESS NETWORK
ABSTRACT
Recently the Electrical supply companies are trying to adopt the electronic measurement of energy consumption data because of reduced manufacturing cost, improved measurement accuracy, increased timely information, miniature size and many other benefits that go well beyond the traditional rotor-plate energy meter type.
In this paper with the help of an energy chip, an improved energy metering solution is developed, where automating the progression of measurement through digital wireless communication technique is adopted to get the above benefits along with smooth control.
The developed energy meter calculates the total average active power mainly for residential consumers. The hardware circuit accepts single phase voltage and currents as its inputs and provides the output in the form of logic data proportional to the average real power.
This data is fed to a remote computer server through the wireless ZigBee network that represents the concept of distant wireless metering, practically involving no manpower. This paper also presents a software solution developed for total electrical energy billing and data management system.
------------------------------
BI-DIRECTIONAL DCM DC TO DC CONVERTER FOR HYBRID ELECTRIC VEHICLES
ABSTRACT
This paper presents a bi-directional DC to DC converter with a unique concept in control. The converter was designed for hybrid electric vehicles, so size becomes a pressing design parameter. For that reason a buck converter in DCM was used to realize the DC to DC converter.
The DCM operation was used in order to shrink the magnetic components, as described in the paper. However, DCM converters are not inherently bi-directional.
The unique controller developed here allows for the DCM converter to seamlessly direct power from low voltage side to high voltage side and from high voltage side back to low voltage side.
A power management technique was also developed to handle a wide array of conditions present in hybrid electric vehicle applications. The technology developed here offers the designer the option to utilize the benefits of a buck converter in DCM while still maintaining a bi-directional power flow.
------------------------------
THE TEMPERATURE HUMIDITY MONITORING SYSTEM OF SOIL BASED ON WIRELESS SENSOR NETWORKS
ABSTRACT
This design uses a wireless sensor network as information acquisition and processing platform. The coverage is big, effectively resolves the disadvantages of wired communications.
Adopting the technology of wireless sensor network based on Zigbee, GPRS and Web Services technology, we design a set of low cost, low power consumption, flexible automatic networking temperature humidity monitoring system of soil.
And the system is a complete set of wireless sensor network induction, acquisition, storage, application, reporting, solution, has a good man-computer exchange interface.
Through commissioning in the demonstration base of soybean in Northeast Agricultural University, it shows that the system can meet the requirements of the temperature and humidity of soil environmental monitoring and unified management.
-----------------------------
A NEW ADAPTIVE WEIGHT ALGORITHM FOR SALT AND PEPPER NOISE REMOVAL
ABSTRACT
A new adaptive weight algorithm is developed for the removal of salt and pepper noise. It consists of two major steps, first to detect noise pixels according to the correlations between image pixels, then use different methods based on the various noise levels.
For the low noise level, neighborhood signal pixels mean method is adopted to remove the noise, and for the high noise level, an adaptive weight algorithm is used.
Experiments show the proposed algorithm has advantages over regularizing methods in terms of both edge preservation and noise removal, even for heavily contaminated image with noise level as high as 90%, it still can get a significant performance.
-----------------------------
REMOVAL OF HIGH DENSITY SALT AND PEPPER NOISE THROUGH MODIFIED DECISION BASED UNSYMMETRIC TRIMMED MEDIAN FILTER
ABSTRACT
A modified decision based unsymmetrical trimmed median filter algorithm for the restoration of gray scale, and color images that are highly corrupted by salt and pepper noise is proposed in this paper.
The proposed algorithm replaces the noisy pixel by trimmed median value when other pixel values, 0's and 255's are present in the selected window and when all the pixel values are 0's and 255's then the noise pixel is replaced by mean value of all the elements present in the selected window.
This proposed algorithm shows better results than the Standard Median Filter (MF), Decision Based Algorithm (DBA), Modified Decision Based Algorithm (MDBA), and Progressive Switched Median Filter (PSMF).
The proposed algorithm is tested against different grayscale and color images and it gives better Peak Signal-to-Noise Ratio (PSNR) and Image Enhancement Factor (IEF).
-----------------------------
OPERATION IMPROVEMENT OF INDOOR ROBOT BY GESTURE RECOGNITION
ABSTRACT
Recently, the demand for the indoor robots has increased. Therefore, increased opportunities for many people to operate the robots have emerged. However, for many people, it is often difficult to operate a robot using the conventional methods like remote control.
To solve this problem, we propose a robot operation system using the hand gesture recognition. Our method pays attention to the direction and movement of the hand. We were able to recognize several gestures in real-time.
ADIABATIC TECHNIQUE FOR ENERGY EFFICIENT LOGIC CIRCUITS DESIGN
ABSTRACT
The Energy dissipation in conventional CMOS circuits can be minimized through adiabatic technique. By adiabatic technique dissipation in PMOS network can be minimized and some of energy stored at load capacitance can be recycled instead of dissipated as heat.
But the adiabatic technique is highly dependent on parameter variation. With the help of TSPICE simulations, the energy consumption is analyzed by variation of parameter.
In analysis, two logic families, ECRL (Efficient Charge Recovery Logic) and PFAL (Positive Feedback Adiabatic Logic) are compared with conventional CMOS logic for inverter and 2:1 multiplexer circuits. It is find that adiabatic technique is good choice for low power application in specified frequency range.
-----------------------------
DESIGN AND FPGA IMPLEMENTATION OF MODIFIED DISTRIBUTIVE ARITHMETIC BASED DWT-IDWT PROCESSOR FOR IMAGE COMPRESSION
ABSTRACT
Image compression is one of the major image processing techniques that is widely used in medical, automotive, consumer and military applications. Discrete wavelet transforms is the most popular transformation technique adopted for image compression.
Complexity of DWT is always high due to large number of arithmetic operations. In this work a modified Distributive Arithmetic based DWT architecture is proposed and is implemented on FPGA. The modified approach consumes area of 6% on Virtex-II pro FPGA and operates at 134 MHz.
The modified DA-DWT architecture has a latency of 44 clock cycles and a throughput of 4 clock cycles. This design is twice faster than the reference design and is thus suitable for applications that require high speed image processing algorithms.
-----------------------------
AN FPGA-BASED ARCHITECTURE FOR LINEAR AND MORPHOLOGICAL IMAGE FILTERING
ABSTRACT
Field Programmable Gate Array (FPGA) technology has become a viable target for the implementation of real time algorithms suited to video image processing applications.
The unique architecture of the FPGA has allowed the technology to be used in many applications encompassing all aspects of video image processing. Among those algorithms, linear filtering based on a 2D convolution, and non-linear 2D morphological filters, represent a basic set of image operations for a number of applications.
In this work, an implementation of linear and morphological image filtering using a FPGA NexysII, Xilinx, Spartan 3E, with educational purposes, is presented. The system is connected to a USB port of a personal computer, which in that way form a powerful and low-cost design station.
The FPGA-based system is accessed through a Matlab graphical user interface, which handles the communication setup. A comparison between results obtained from MATLAB simulations and the described FPGA-based implementation is presented.
-----------------------------
DESIGN OF A LOW POWER FLIP-FLOP USING CMOS DEEP SUBMICRON TECHNOLOGY
ABSTRACT
This paper enumerates low power, high speed design of flip-flop having less number of transistors and only one transistor being clocked by short pulse train which is true single phase clocking (TSPC) flip-flop.
Compared to Conventional flip-flop, it has 5 Transistors and one transistor clocked, thus has lesser size and lesser power consumption. It can be used in various applications like digital VLSI clocking system, buffers, registers, microprocessors etc.
The analysis for various flip flops and latches for power dissipation and propagation delays at 0.13 ¿m and 0.35 ¿m technologies is carried out. The leakage power increases as technology is scaled down.
The leakage power is reduced by using best technique among all run time techniques viz. MTCMOS. Thereby comparison of different conventional flip-flops, latches and TSPC flip-flop in terms of power consumption, propagation delays and product of power dissipation and propagation delay with SPICE simulation results is presented.
-----------------------------
LOW-POWER AND AREA-EFFICIENT CARRY SELECT ADDER
ABSTRACT
Carry Select Adder (CSLA) is one of the fastest adders used in many data-processing processors to perform fast arithmetic functions. From the structure of the CSLA, it is clear that there is scope for reducing the area and power consumption in the CSLA.
This work uses a simple and efficient gate-level modification to significantly reduce the area and power of the CSLA. Based on this modification 8-, 16-, 32-, and 64-b square-root CSLA (SQRT CSLA) architecture have been developed and compared with the regular SQRT CSLA architecture.
The proposed design has reduced area and power as compared with the regular SQRT CSLA with only a slight increase in the delay. This work evaluates the performance of the proposed designs in terms of delay, area, power, and their products by hand with logical effort and through custom design and layout in 0.18-$mu$m CMOS process technology. The results analysis shows that the proposed CSLA structure is better than the regular SQRT CSLA.
-----------------------------
A PIPELINE VLSI ARCHITECTURE FOR HIGH-SPEED COMPUTATION OF THE 1-D DISCRETE WAVELET TRANSFORM
ABSTRACT
In this paper, a scheme for the design of a high-speed pipeline VLSI architecture for the computation of the 1-D discrete wavelet transform (DWT) is proposed. The main focus of the scheme is on reducing the number and period of clock cycles for the DWT computation with little or no overhead on the hardware resources by maximizing the inter- and intrastage parallelisms of the pipeline.
The interstage parallelism is enhanced by optimally mapping the computational load associated with the various DWT decomposition levels to the stages of the pipeline and by synchronizing their operations. The intrastage parallelism is enhanced by decomposing the filtering operation equally into two subtasks that can be performed independently in parallel and by optimally organizing the bitwise operations for performing each subtask so that the delay of the critical data path from a partial-product bit to a bit of the output sample for the filtering operation is minimized.
It is shown that an architecture designed based on the proposed scheme requires a smaller number of clock cycles compared to that of the architectures employing comparable hardware resources. In fact, the requirement on the hardware resources of the architecture designed by using the proposed scheme also gets improved due to a smaller number of registers that need to be employed.
Based on the proposed scheme, a specific example of designing an architecture for the DWT computation is considered. In order to assess the feasibility and the efficiency of the proposed scheme, the architecture thus designed is simulated and implemented on a field-programmable gate-array board.
It is seen that the simulation and implementation results conform to the stated goals of the proposed scheme, thus making the scheme a viable approach for designing a practical and realizable architecture for real-time DWT computation.
-----------------------------
DUAL STACK METHOD: A NOVEL APPROACH TO LOW LEAKAGE AND SPEED POWER PRODUCT VLSI DESIGN
ABSTRACT
The development of digital integrated circuits is challenged by higher power consumption. The combination of higher clock speeds, greater functional integration, and smaller process geometries has contributed to significant growth in power density. Scaling improves transistor density and functionality on a chip.
Scaling helps to increase speed and frequency of operation and hence higher performance. As voltages scale downward with the geometries threshold voltages must also decrease to gain the performance advantages of the new technology but leakage current increases exponentially.
Today leakage power has become an increasingly important issue in processor hardware and software design. In 65 nm and below technologies, leakage accounts for 30-40% of processor power.
In this paper, we propose a new dual stack approach for reducing both leakage and dynamic powers. Moreover, the novel dual stack approach shows the least speed power product when compared to the existing methods.
DSP
REMOVAL OF HIGH DENSITY SALT AND PEPPER NOISE THROUGH MODIFIED DECISION BASED UNSYMMETRIC TRIMMED MEDIAN FILTER
ABSTRACT
A modified decision based unsymmetrical trimmed median filter algorithm for the restoration of gray scale, and color images that are highly corrupted by salt and pepper noise is proposed in this paper.
The proposed algorithm replaces the noisy pixel by trimmed median value when other pixel values, 0's and 255's are present in the selected window and when all the pixel values are 0's and 255's then the noise pixel is replaced by mean value of all the elements present in the selected window.
This proposed algorithm shows better results than the Standard Median Filter (MF), Decision Based Algorithm (DBA), Modified Decision Based Algorithm (MDBA), and Progressive Switched Median Filter (PSMF).
The proposed algorithm is tested against different grayscale and color images and it gives better Peak Signal-to-Noise Ratio (PSNR) and Image Enhancement Factor (IEF).
-----------------------------
A NEW ADAPTIVE WEIGHT ALGORITHM FOR SALT AND PEPPER NOISE REMOVAL
ABSTRACT
A new adaptive weight algorithm is developed for the removal of salt and pepper noise. It consists of two major steps, first to detect noise pixels according to the correlations between image pixels, then use different methods based on the various noise levels.
For the low noise level, neighborhood signal pixels mean method is adopted to remove the noise, and for the high noise level, an adaptive weight algorithm is used.
Experiments show the proposed algorithm has advantages over regularizing methods in terms of both edge preservation and noise removal, even for heavily contaminated image with noise level as high as 90%, it still can get a significant performance.
-----------------------------
A MODIFIED WEIGHTED BASED FILTER FOR REMOVAL OF RANDOM IMPULSE NOISE (MWB)
ABSTRACT
In this paper an effort has been made to device an algorithm for highly corrupted images. In this paper a novel Modified Weighted Based(MWB) filter has been proposed, which is based on the weighted differences between the current pixel and its neighbors aligned with four main directions.
Simulations showed that the MWB filter provides optimal performances of suppressing impulse with high noise level which may enhance the performance in terms of removal of random-valued impulse noise compared to the directional weighted median (DWM) filter along with other filters like signal-dependent rank order mean (SDROM)filter, multistate median (MSM) filter, adaptive center weighted median (ACWM) filter, pixel-wise MAD(PWMAD) filter etc.
-----------------------------
RANDOM IMPULSE NOISE REMOVAL FROM IMAGE SEQUENCES BASED ON FUZZY LOGIC
ABSTRACT
In this paper a new filter for image sequences corrupted with random impulse noise is presented. In order to preserve the image details as much as possible, the noise is removed in different successive filtering steps. In each step, only the pixels that are detected as being noisy are filtered, while the noise-free pixels remain unchanged.
The noise detection is based on fuzzy set theory and fuzzy rules, which are very useful for the processing of human knowledge and linguistic values. To exploit the temporal information in image sequences as much as possible, detected pixels are finally filtered in a motion compensated way.
From the experimental results it can be seen that the proposed method outperforms other state-of-the-art filters both in terms of the peak-signal-to-noise ratio, the mean absolute error, and visually.
-----------------------------
POISSON NOISE REMOVAL FROM IMAGES USING THE FAST DISCRETE CURVELET TRANSFORM
ABSTRACT
We propose a strategy to combine the variance stabilizing transform (VST), used for Poisson image denoising, with the fast discrete Curvelet transform (FDCT). The VST transforms the Poisson image to approximately Gaussian distributed, and the subsequent denoising can be performed in the Gaussian domain. However, the performance of the VST degrades when the original image intensity is very low.
On the other hand, the FDCT can sparsely represent the intrinsic features of images having discontinuities along smooth curves. Therefore, it is suitable for denoising applications. Combining the VST with the FDCT leads to good Poisson image denoising algorithms, even for low intensity images.
We present a simple approach to achieve this and demonstrate some simulation results. The results show that the VST combined with the FDCT is a promising candidate for Poisson denoising.
-----------------------------
MDS-BASED MULTIRESOLUTION NONLINEAR DIMENSIONALITY REDUCTION MODEL FOR COLOR IMAGE SEGMENTATION
ABSTRACT
In this paper, we present an efficient coarse-to-fine multiresolution framework for multidimensional scaling and demonstrate its performance on a large-scale nonlinear dimensionality reduction and embedding problem in a texture feature extraction step for the unsupervised image segmentation problem.
We demonstrate both the efficiency of our multiresolution algorithm and its real interest to learn a nonlinear low-dimensional representation of the texture feature set of an image which can then subsequently be exploited in a simple clustering-based segmentation algorithm.
The resulting segmentation procedure has been successfully applied on the Berkeley image database, demonstrating its efficiency compared to the best existing state-of-the-art segmentation methods recently proposed in the literature.
-----------------------------
DISCRETE WAVELET TRANSFORM-BASED SATELLITE IMAGE RESOLUTION ENHANCEMENT
ABSTRACT
Satellite images are being used in many fields of research. One of the major issues of these types of images is their resolution. In this paper, we propose a new satellite image resolution enhancement technique based on the interpolation of the high-frequency subbands obtained by discrete wavelet transform (DWT) and the input image.
The proposed resolution enhancement technique uses DWT to decompose the input image into different subbands. Then, the high-frequency subband images and the input low-resolution image have been interpolated, followed by combining all these images to generate a new resolution-enhanced image by using inverse DWT.
In order to achieve a sharper image, an intermediate stage for estimating the high-frequency subbands has been proposed. The proposed technique has been tested on satellite benchmark images.
The quantitative (peak signal-to-noise ratio and root mean square error) and visual results show the superiority of the proposed technique over the conventional and state-of-art image resolution enhancement techniques.
WAVELET ENHANCED FUSION ALGORITHM FOR MULTISENSOR IMAGES
ABSTRACT
Due to the limitation of the image acquisition equipment itself and the constraints of taking environment and other factors, the resolution and contrast of the obtained images have declined, and some important information in the images was hidden in the acquisition process.
Therefore, in order to get a richer picture, the source images must be enhanced prior to the integration, so as to access the hidden information. The proposed paper introduces the general integration scheme based on image enhancement, and presents a fusion method with the wavelet image enhancement technology.
We first enhance the source images according to wavelet image enhancement technology, and then use the appropriate fusion rule to integrate the coefficients of the original images and the enhanced images.
Experimental results show that the enhancement of the source images prior to integration, could improve the fusion effect and obtain the hidden information barely acquired through directly fusion without enhancement.
-----------------------------
A STEGANOGRAPHIC METHOD BASED ON INTEGER WAVELET TRANSFORM AND GENETIC ALGORITHM
ABSTRACT
This paper proposes a novel steganography scheme based on Integer Wavelet Transform and Genetic Algorithm. The novel scheme embeds data in integer wavelet transform coefficients by using a mapping function based on Genetic Algorithm in an 8 × 8 block on the cover image.
The optimal pixel adjustment process is applied after embedding the message. We employed frequency domain to increase the robustness of our steganography method. Integer wavelet transform avoids the floating point precision problems of the wavelet filter.
We use GA and Optimal Pixel Adjustment Process to obtain an optimal mapping function to reduce the difference error between the cover and the stego-image and to increase the hiding capacity with low distortions respectively.
Simulation results show that the novel scheme outperforms adaptive steganography technique based on integer wavelet transform in term of peak signal to noise ratio and capacity, 35.17 dB and 50% respectively.
-----------------------------
SECURITY ANALYSIS ON SPATIAL 1 STEGANOGRAPHY FOR JPEG DECOMPRESSED IMAGES
ABSTRACT
Although many existing steganalysis works have shown that the spatial ±1 steganography on JPEG pre-compressed images is relatively easier to be detected compared with that on the never-compressed images, most experimental results seem not very convincing since these methods usually assume that the quantization table of the JPEG stegos previously used is known before detection and/or the length of embedded message is fixed.
Furthermore, there are just few effective quantitative algorithms for further estimating the spatial modifications. In this letter, we firstly propose an effective method to detect the quantization table from the contaminated digital images which are originally stored as JPEG format based on our recently developed work about JPEG compression error analysis, and then we present a quantitative method to reliably estimate the length of spatial modifications in those gray-scale JPEG stegos by using data fitting technology.
The extensive experimental results show that our estimators are very effective, and the order of magnitude of prediction error can remain around measured by the mean absolute difference.
ISOLATED WIND–HYDRO HYBRID SYSTEM USING CAGE GENERATORS AND BATTERY STORAGE
ABSTRACT
This paper deals with a new isolated wind-hydro hybrid generation system employing one squirrel-cage induction generator (SCIG) driven by a variable-speed wind turbine and another SCIG driven by a constant-power hydro turbine feeding three-phase four-wire local loads.
The proposed system utilizes two back-to-back-connected pulsewidth modulationcontrolled insulated-gate-bipolar-transistor-based voltage-source converters (VSCs) with a battery energy storage system at their dc link.
The main objectives of the control algorithm for the VSCs are to achieve maximum power tracking (MPT) through rotor speed control of a wind-turbine-driven SCIG under varying wind speeds and control of the magnitude and the frequency of the load voltage.
The proposed wind-hydro hybrid system has a capability of bidirectional active- and reactive-power flow, by which it controls the magnitude and the frequency of the load voltage.
The proposed electromechanical system using SCIGs, an MPT controller, and a voltage and frequency controller are modeled and simulated in MATLAB using Simulink and Sim Power System set toolboxes, and different aspects of the proposed system are studied for various types of linear, nonlinear, and dynamic loads, and under varying wind-speed conditions.
The performance of the proposed system is presented to demonstrate its capability of MPT, voltage and frequency control (VFC), harmonic elimination, and load balancing.
-----------------------------
TECHNO-ECONOMIC ANALYSIS OF SVC-HVDC TRANSMISSION SYSTEM FOR OFFSHORE WIND
ABSTRACT
One of the trends concerning offshore wind farms is to increase the distance from the wind farm to the shore, and has to be transported over very long distances to make a connection with the main supply grid. But placing wind farms offshore rises a lot o challenges related to construction, installation and nevertheless with the energy transmission.
VSC HVDC is a rather new technology with promising characteristics for offshore wind transmission. And the techno-economic value analysis for VSC HVDC is necessary as all projects require a maximal effort in order to make the offshore wind farm viable. The possible structures for offshore wind farm and some feasible turbine topologies for offshore wind were introduced in the paper.
Based on the grid code requirements, a techno-economic analysis for VSC HVDC with SCIG was proposed. This HVDC system is compared to the main variable-speed topologies (DFIG and DDPMSG) in combination with HVAC and a typical wind farm is put upfront to investigate. Result show that the SVC HVDC transmission system with SCIC could get a cost-efficient.
-----------------------------
GRID INTERCONNECTION OF RENEWABLE ENERGY SOURCES AT THE DISTRIBUTION LEVEL WITH POWER-QUALITY IMPROVEMENT FEATURES
ABSTRACT
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems.
The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current.
All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid.
This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
-----------------------------
A NEW APPROACH TO MULTIFUNCTIONAL DYNAMIC VOLTAGE RESTORER IMPLEMENTATION FOR EMERGENCY CONTROL IN DISTRIBUTION SYSTEMS
ABSTRACT
The dynamic voltage restorer (DVR) is one of the modern devices used in distribution systems to protect consumers against sudden changes in voltage amplitude. In this paper, emergency control in distribution systems is discussed by using the proposed multifunctional DVR control strategy.
Also, the multiloop controller using the Posicast and P+Resonant controllers is proposed in order to improve the transient response and eliminate the steady-state error in DVR response, respectively. The proposed algorithm is applied to some disturbances in load voltage caused by induction motors starting, and a three-phase short circuit fault. Also, the capability of the proposed DVR has been tested to limit the downstream fault current.
The current limitation will restore the point of common coupling (PCC) (the bus to which all feeders under study are connected) voltage and protect the DVR itself.
The innovation here is that the DVR acts as a virtual impedance with the main aim of protecting the PCC voltage during downstream fault without any problem in real power injection into the DVR. Simulation results show the capability of the DVR to control the emergency conditions of the distribution systems.
-----------------------------
RESEARCH ON THE WIND FARM REACTIVE POWER COMPENSATION CAPACITY AND CONTROL TARGET
ABSTRACT
Wind generation rapid development has brought challenge to the grid. Reactive voltage is the most outstanding and one of the most concerned problems.
This paper introduces the concept of wind farms reactive power compensation and wind power grid code with respect to reactive power regulation all over the world, gives the simplified approach to estimate reactive power compensation capacity, and validates its efficiency with the case study.
From grid reactive voltage control target and practical operation routine, the paper analyses and compares the impacts of two reactive power control targets, that is, constant voltage and constant power factor, on the grid steady-state operation.
The conclusion shows that the reactive power compensation control target of wind farms should be determined by the robustness of the grid integrated, hierarchical reactive power balance, wind turbines reactive voltage control characteristic, and the reactive compensation device applied in wind farms.
-----------------------------
FLEXIBLE D-STATCOM PERFORMANCE AS A FLEXIBLE DISTRIBUTED GENERATION IN MITIGATING FAULTS
ABSTRACT
This paper proposes a flexible D-STATCOM (Distribution Static COMpensator) and its new controller system, that be able to both mitigate all types of faults and operate as a Distributed Generation (DG), when it supplies power to sensitive loads while the main utility source is disconnected (i.e. it is under islanded operating condition).
Thus D-STATCOM operates same as a flexible DG (FDG) and consequently, it is called Flexible D-STATCOM (FD-STATCOM). This paper validates the performance of FD-STATCOM system to mitigate power quality problems and improve distribution system performance under all types of system related disturbances and system unbalanced faults, such as Line-to-Line (LL) and Double Line to Ground (DLG) faults and supplies power to sensitive loads under islanding condition.
In this paper, the 12-pulse D-STATCOM configuration with IGBT is designed and the graphic based models of the D-STATCOM are developed using the PSCAD/EMTDC electromagnetic transient simulation program.
The reliability and robustness of the control schemes in the system response to the voltage disturbances caused by LL and DLG faults and islanded operating condition are obviously proved in the simulation results.
-----------------------------
POWER SYSTEM STABILITY ENHANCEMENT USING STATIC SYNCHRONOUS SERIES COMPENSATOR (SSSC)
ABSTRACT
In this study, a static synchronous series compensator (SSSC) is used to investigate the effect of this device in controlling active and reactive powers as well as damping power system oscillations in transient mode.
The SSSC equipped with a source of energy in the DC link can supply or absorb the reactive and active power to or from the line. Simulations have been done in MATLAB/SIMULINK environment.
Simulation results obtained for selected bus-2 in two machine power system shows the efficacy of this compensator as one of the FACTS devices member in controlling power flows, achieving the desired value for active and reactive powers, and damping oscillations appropriately.
-----------------------------
MATRIX CONVERTER-BASED UNIFIED POWER-FLOW CONTROLLERS ADVANCED DIRECT POWER CONTROL METHOD
ABSTRACT
This paper presents a direct power control (DPC) for three-phase matrix converters operating as unified power flow controllers (UPFCs). Matrix converters (MCs) allow the direct ac/ac power conversion without dc energy storage links; therefore, the MC-based UPFC (MC-UPFC) has reduced volume and cost, reduced capacitor power losses, together with higher reliability.
Theoretical principles of direct power control (DPC) based on sliding mode control techniques are established for an MC-UPFC dynamic model including the input filter. As a result, line active and reactive power, together with ac supply reactive power, can be directly controlled by selecting an appropriate matrix converter switching state guaranteeing good steady-state and dynamic responses.
Experimental results of DPC controllers for MC-UPFC show decoupled active and reactive power control, zero steady-state tracking error, and fast response times.
Compared to an MC-UPFC using active and reactive power linear controllers based on a modified Venturini high-frequency PWM modulator, the experimental results of the advanced DPC-MC guarantee faster responses without overshoot and no steady-state error, presenting no cross-coupling in dynamic and steady-state responses.
-----------------------------
MODELING, ANALYSIS, AND CONTROL FOR THE RECTIFIER OF HYBRID HVDC SYSTEMS FOR DFIG-BASED WIND FARMS
ABSTRACT
In order to improve the dynamic performance of the hybrid HVdc system for doubly fed induction generator wind farms, this paper presents the modeling, analysis, and control methods for its line-commutated rectifier.
First, the state variable model of the rectifier subsystem on the reference frame is derived considering different control modes of the current source inverter subsystem. Then, the ac current dynamic of the rectifier subsystem is quantitatively analyzed based on the eigenvalue analysis method.
According to the analysis results, a double loop control scheme is designed: the inner loop utilizes the inverse system control technique plus a switchable phase-lead compensator, and the outer loop implements an ordinary propotional-integral controller.
Finally, the validity of the quantitative analysis method and the superiority of the proposed control scheme are verified by Simulink / SimPowerSystems simulations.
-----------------------------
PERFORMANCE ANALYSIS OF LCL-T RESONANT CONVERTER WITH FUZZY/PID CONTROLLER USING STATE SPACE ANALYSIS
ABSTRACT
A closed loop series parallel resonant converter with LCL-T configuration has been simulated and presented in this paper. The fuzzy/PID controller has been used for closed loop operation and the performance of proposed converter has been estimated with the closed loop and the open loop condition.
The mathematical model using state space approach has been developed and simulated using MATLAB. The performance of the converter has been found to be better when the fuzzy controller has been considered.
The Harmonic Spectrum and steady state error for various load condition have been obtained to validate the role of controllers. The proposed approach is expected to provide better voltage regulation for dynamic load conditions.
A 2.4-GHZ ENERGY-EFFICIENT TRANSMITTER FOR WIRELESS MEDICAL APPLICATIONS
Biomedical Circuits and Systems, IEEE Transactions on
ABSTRACT
A 2.4-GHz energy-efficient transmitter (TX) for wireless medical applications is presented in this paper. It consists of four blocks: a phase-locked loop (PLL) synthesizer with a direct frequency presetting technique, a class-B power amplifier, a digital processor, and nonvolatile memory (NVM).
The frequency presetting technique can accurately preset the carrier frequency of the voltage-controlled oscillator and reduce the lock-in time of the PLL synthesizer, further increasing the data rate of communication with low power consumption. The digital processor automatically compensates preset frequency variation with process, voltage, and temperature.
The NVM stores the presetting signals and calibration data so that the TX can avoid the repetitive calibration process and save the energy in practical applications. The design is implemented in 0.18- µm radio-frequency complementary metal-oxide semiconductor process and the active area is 1.3 mm 2.
The TX achieves 0-dBm output power with a maximum data rate of 4 Mb/s/2 Mb/s and dissipates 2.7-mA/5.4-mA current from a 1.8-V power supply for on-off keying/frequency-shift keying modulation, respectively. The corresponding energy efficiency is 1.2 nJ/b·mW and 4.8 nJ/b· mW when normalized to the transmitting power.
-----------------------------
A DECISION-SUPPORT MODEL FOR FILTERING RFID READ DATA IN SUPPLY CHAINS
ABSTRACT
The introduction of radio-frequency identification (RFID) tags in supply chains engenders the need for incorporating and utilizing the additional generated data. It is generally assumed that these data, once generated, are complete and rife with necessary information for making decisions.
The reality is, however, that these data are not error free. Common errors observed in these data include false positives and false negatives. Given that these data are among the set of primary inputs for decision-making purposes, the read-rate accuracy is of paramount importance for effectively managing supply chains incorporating such data. Although there are means by which the RFID tag read rate could be improved to a certain extent, the errors in read rate cannot be completely eliminated, and decision makers are left to deal with such data while managing the supply chain.
We present and illustrate few algorithms that can be used to reduce false read rates. We consider models for filtering data that are already being gathered in RFID systems and utilize it to improve read-rate accuracy. We implement the proposed models and illustrate their performance.
-----------------------------
A HYBRID WIRED/WIRELESS NETWORKING INFRASTRUCTUREFOR GREENHOUSE MANAGEMENT
This paper appears in: Instrumentation and Measurement, IEEE Transactions on
ABSTRACT
In this paper, the problems related to the management of a farm made up of several greenhouses are discussed. The management of this kind of farms requires data acquisition in each greenhouse and their transfer to a control unit which is usually located in a control room, separated from the production area.
At present, the data transfer between the greenhouses and the control system is mainly provided by a suitable wired communication system, such as a fieldbus. In such contexts, even though the replacement of the wired system with a fully wireless one can appear very attractive, a fully wireless system can introduce some disadvantages.
A solution based on a hybrid wired/wireless network, where Controller Area Network and ZigBee protocols are used, is presented along with all the related problems that this integration involves. In particular, in order to integrate at the Data Link Layer the wireless section with the wired one, a suitable multiprotocol bridge has been implemented.
Moreover, at the Application Layer, porting of Smart Distributed System services on ZigBee, called ZSDS, allows one to access the network resources independently from the network segment they are connected to.
-----------------------------
A SELF-SUPPLIED INERTIAL PIEZOELECTRIC ENERGY HARVESTER WITH POWER-MANAGEMENT IC
ABSTRACT
Harvesting energy from ambient vibrations is a promising technology for fully autonomous wireless sensor nodes, which can give birth to new applications in biomedical, industrial, and environmental monitoring.
There have been independent solutions in increasing the harvesting efficiency either on the mechanical harvester or on its power management circuitry.
Recently, a piezo electric MEMS harvester using AIN was demonstrated to generate enough energy to autonomously power a wireless temperature sensor with a full-bridge rectifier built with off-the-shelf components. Meanwhile, AC-DC converters for piezoelectric harvesters have been designed to enable efficient power extraction, or efficient rectification of low-voltage outputs, and have been tested with commercial meso-scale piezoelectric beams.
However, to realize an efficient stand-alone energy generator platform, it is necessary to integrate these efforts into a single low-volume system. This paper presents a self-supplied energy generator, which includes a MEMS harvester hybridly integrated with its power management circuitry for autonomous charging of an energy reservoir.
-----------------------------
A STANDALONE RFID INDOOR POSITIONING SYSTEM USING PASSIVE TAGS
This paper appears in: Industrial Electronics, IEEE Transactions on
ABSTRACT
Indoor positioning systems (IPSs) locate objects in closed structures such as office buildings, hospitals, stores, factories, and warehouses, where Global Positioning System devices generally do not work. Most available systems apply wireless concepts, optical tracking, and/or ultrasound.
This paper presents a standalone IPS using radio frequency identification (RFID) technology. The concept is based on an object carrying an RFID reader module, which reads low-cost passive tags installed next to the object path. A positioning system using a Kalman filter is proposed.
The inputs of the proposed algorithm are the measurements of the backscattered signal power propagated from nearby RFID tags and a tag-path position database. The proposed algorithm first estimates the location of the reader, neglecting tag-reader angle-path loss.
Based on the location estimate, an iterative procedure is implemented, targeting the estimation of the tag-reader angle-path loss, where the latter is iteratively compensated from the received signal strength information measurement. Experimental results are presented, illustrating the high performance of the proposed positioning system.
-----------------------------
A TESTBED FOR ANALYZING SECURITY OF SCADA CONTROL SYSTEMS (TASSCS)
ABSTRACT
The critical infrastructures of our society are in the process of being modernized. Most significantly impacted are the industrial control systems through replacement of old electromechanical systems with advanced computing and communication technologies. This modernization has introduced new vulnerabilities to those infrastructures.
Securing critical infrastructures is a challenging research problem, as these control systems were not designed with security in mind. This paper presents a testbed designed to study and simulate the various available techniques for securing and protecting Supervisory Control and Data Acquisition (SCADA) systems against a wide range of cyber attacks.
The testbed is also used to evaluate the detection rate, false alerts and effectiveness of the protection techniques. We present preliminary results on using the testbed to detect a selected set of cyber attacks and the impact of the protection techniques on the operations of the system.
-----------------------------
A VIBRATION-BASED ELECTROMAGNETIC ENERGY HARVESTER USING MECHANICAL FREQUENCY UP-CONVERSION METHOD
ABSTRACT
This paper presents a new vibration-based electromagnetic energy harvester using a mechanical frequency up-conversion method for harvesting energy from external low-frequency vibrations within a range of 1-10 Hz.
The structure consists of a magnet placed on a diaphragm, a polystyrene cantilever carrying a pick-up coil, and a mechanical barrier which converts low-frequency vibrations to a higher frequency, hence increasing the efficiency of the system. The tested structure proved to generate 88.6 mV and 544.7 µW rms power output by up-converting 10-Hz external vibration to 394 Hz. The obtained power density is 184 µW/cm3, with a device volume of 2.96 cm3.
An analytical model is developed to analyze the behavior of the energy harvester prototypes with various dimensions. The model predicts the performance parameters of the structures within 5% error range. The effect of scaling down the device dimensions is investigated through the developed model and fabricated prototypes.
It is shown that the power density of the energy harvester is increased as its dimensions are scaled down, proving that the proposed structure is a good candidate to be used in low-power wireless microsystems operating at low-frequency vibrations.
-----------------------------
AN INTELLIGENT LIGHTING SYSTEM FOR EXHIBITION APPLICATIONS
ABSTRACT
This paper presents the design and the implementation of a lighting system which is able to detect the approach of the visitors and then turn the lighting onto the normal intensity to let the exhibition be bright enough.
All lightings are equipped with the energy-saving function which will turn itself to the dimming level automatically after the visitors' leaving. PIR (Passive Infrared) sensors are utilized in the system instead of a video camera for the purposes of both cost-down and privacy issue.
The lightings are also designed to have network interface to let them be able to be connected together to form an intelligent lighting system which can not only collect the exhibition information but also help the administrators to secure the exposition.
-----------------------------
AUTOMATED OFF-LINE RESPIRATORY EVENT DETECTION FOR THE STUDY OF POSTOPERATIVE APNEA IN INFANTS
ABSTRACT
Previously, we presented automated methods for thoraco-abdominal asynchrony estimation and movement artifact detection in respiratory inductance plethysmography (RIP) signals. This paper combines and improves these methods to give a method for the automated, off-line detection of pause, movement artifact, and asynchrony. Simulation studies demonstrated that the new combined method is accurate and robust in the presence of noise. The new procedure was successfully applied to cardiorespiratory signals acquired postoperatively from infants in the recovery room. A comparison of the events detected with the automated method to those visually scored by an expert clinician demonstrated a higher agreement (? = 0.52) than that amongst several human scorers (? = 0.31) in a clinical study . The method provides the following advantages: first, it is fully automated; second, it is more efficient than visual scoring; third, the analysis is repeatable and standardized; fourth, it provides greater agreement with an expert scorer compared to the agreement between trained scorers; fifth, it is amenable to online detection; and lastly, it is applicable to uncalibrated RIP signals. Examples of applications include respiratory monitoring of postsurgical patients and sleep studies.
-----------------------------
AUTOMATED URBAN DRINKING WATER SUPPLY CONTROL AND WATER THEFT IDENTIFICATION SYSTEM
ABSTRACT
The rapid growing of the wide urban residential areas imposes the expansion as well as the modernization of the existing water supply facilities. Along with this one more problem is identified in the water supply channels, some people use ½ HP to 1 HP pump to suck the water directly from the channel of their home street. Process automation system based upon utilization of an industrial PLC and PC systems including all the network components represents the best way to improve the water distribution technological process. The water theft can be best monitored by the flow variations given by the flow sensors mounted on the channels. The system includes Remote Terminal Units - RTU, specific transducers and actuators distributed on a wide geographical area and control and power panels for the pump stations. The reliable instrumentation connected to PLC or RTU assure real time monitoring of the main technological parameters of large water distribution networks. The data acquired of SCADA system (Supervisory Control and Data Acquisition) represent the support for optimization of the process and data- driven Decision Support System. The system uses HMI implemented on PC to ensure the process supervision and remote control functions based on OPC technologies and wireless communication components for WAN data transfer. The complete SCADA system for water distribution enable the user to get a high operation safety of the network, a cost effective use of equipment, energy efficiency and optimize the daily operation and maintenance procedures.
-----------------------------
DESIGN AND IMPLEMENTATION OF A HOME EMBEDDED SURVEILLANCE SYSTEM WITH ULTRA-LOW ALERT POWER
This paper appears in: Consumer Electronics, IEEE Transactions on
ABSTRACT
In this paper we design and implement a home embedded surveillance system with ultra-low alert power. Traditional surveillance systems suffer from an unnecessary waste of power and the shortcomings of memory conditions in the absence of invasion. In this design we use Pyroelectric Infrared sensors (PIR) and pressure sensors as the alert group in windows and doors where an intruder must pass through. These low-power alert sensors wake up the MCU (Micro Controller Unit) which has power management for the ultrasonic sensors and PIR sensors indoors. This state transition method saves a large number of sensors required for the alert power. We also use the Majority Voting Mechanism (MVM) to manage the sensor groups to enhance the probability of multiple sensors sensing. After the MCU sends the sensor signals to the embedded system, the program starts the Web camera. Our sensing experiment shows that we reduce the system's power consumption.
-----------------------------
DESIGN OF LANDSLIDE WARNING SYSTEM
ABSTRACT
In recent years, the frequent occurrence of landslide disasters, caused great harm to people's lives and properties. This paper designs some wireless sensor monitoring nodes distributed on the hillside, they construct a wireless data collection network based on the ZigBee protocol. This design combines GSM wireless communication technology and wireless sensor network, it have completed the work from the system solution to the whole process of software and hardware design. The result proves that each node works stably and the status of network communication is good. This design can collects the depth of water in the mountain and the slope angle of the hillside, and provides the monitoring center with warning information in time, so related departments can take effective measures rapidly to protect people's lives and properties
DESIGN OF MULTI-SENSOR INTEGRATED NAVIGATION SYSTEM FOR LAND VEHICLE
ABSTRACT
In order to improve the accuracy and reliability of the vehicle navigation, we select the ring laser gyro (RLG) strapdown inertial navigation system (SINS) as the core navigation system, and select GPS and odometer as the navigation aids, the multisensor integrated navigation system for land vehicle based on the multi-sensor information fusion technology is designed and accomplished in this paper. With respect to the advantages and disadvantages of all the sensors, according to the actual work condition, in this system the sensors information is rationally selected as measurements, and the centralized Kalman filter algorithm is adopted to estimate and correct the errors of the system. Thus it can realize the high-accuracy, continuous and reliable navigation of the system. The theoretical analysis and experiment results show that the designed system takes on higher accuracy and reliability and satisfies different application demands, so it is more suitable for practical application.
-----------------------------
DETECTION OF COGNITIVE INJURED BODY REGION USINGMULTIPLE TRIAXIAL ACCELEROMETERS FOR ELDERLY FALLING
ABSTRACT
This paper aimed to use several triaxial acceleration sensor devices for joint sensing of injured body parts, when an accidental fall occurs. The model transmitted the information fed by the sensors distributed over various body parts to the computer through wireless transmission devices for further analysis and judgment, and employed cognitive adjustment method to adjust the acceleration range of various body parts in different movements. The model can determine the possible occurrence of fall accidents, when the acceleration significantly exceeds the usual acceleration range. In addition, after a fall accident occurs, the impact acceleration and normal (habitual) acceleration can be compared to determine the level of injury. This study also implemented a sensing system for analysis. The area of the body parts that may sustain greater impact force are marked red in this system, so that more information can be provided for medical personnel for more accurate judgment.
-----------------------------
DEVELOPMENT OF A DISTRIBUTED DATA COLLECTION SYSTEM BASED ON EMBEDDED ETHERNET
ABSTRACT
We describe a low cost distributed data collection system based on embedded Ethernet. Embedded Ethernet is nothing but a microcontroller which is able to communicate with the network. Low cost microcontrollers have memory limitations, and therefore, have limited connectivity options. Enabling a microcontroller to communicate to a data communication network would allow greater flexibility and enhance their usage in several applications that require distributed data collection, monitoring or controlling such applications.
-----------------------------
ENHANCED VOICE ACTIVITY DETECTION USING ACOUSTIC EVENT DETECTION AND CLASSIFICATION
This paper appears in: Consumer Electronics, IEEE Transactions on
ABSTRACT
We examine user-friendly voice interface that requires the hands-free speech acquisition in the continuously listening environment. The traditional voice activity detection (VAD) algorithms cannot successfully identify potential acoustic event sounds from speech. This makes the speech recognition system frequently or incorrectly activated. In this paper, we propose a novel voice activity detection technique that consists of two major modules: 1) classification and 2) detection module. In the classification module, we label the successive audio segments based on the training models. Then, in the detection module, we remove the acoustic event sounds and make decision of the explicit utterance boundary from the input audio stream. As a result, the proposed technique enables the efficient operation of speech recognition in the continuously listening environment without any touch and/or key input. Experiments in a real-world environment and performance comparison with state-of-the-art techniques are conducted to demonstrate the effectiveness of the proposed technique.
-----------------------------
FAULT LOCATION IN UNDERGROUND POWER NETWORKS: A CASE STUDY
This paper appears in: Innovative Smart Grid Technologies (ISGT), 2011 IEEE PES
ABSTRACT
The present paper addresses the topic of fault location in power networks with cable lines. In the era of smart-grid the demand of intelligent measurement systems capable of providing quickly and with high accuracy the right location of faults in power networks is growing fast. Many proposals can be found in literature relevant to different approaches. Some commercial instrumentation is also available on the market for this purpose. Protection relays implementing this feature can either be found. This paper presents the experimental results of a measurement campaign carried out in the MV power network in the city of Milan (Italy). For this purpose the local Utility (A2A SpA) is using a commercial distributed measurement system (the ALTEA FLS) for locating both faults and also fast transients due to customers' loads operation. Preliminary experimental results have shown good performance. They have been better analyzed in order to investigate over the reliability and the accuracy of such measurement system.
-----------------------------
FEATURE SELECTION FOR ACCELEROMETER-BASED POSTUREANALYSIS IN PARKINSON’S DISEASE
This paper appears in: Information Technology in Biomedicine, IEEE Transactions on
ABSTRACT
Posture analysis in quiet standing is a key component of the clinical evaluation of Parkinson's disease (PD), postural instability being one of PD's major symptoms. The aim of this study was to assess the feasibility of using accelerometers to characterize the postural behavior of early mild PD subjects. Twenty PD and 20 control subjects, wearing an accelerometer on the lower back, were tested in five conditions characterized by sensory and attentional perturbation. A total of 175 measures were computed from the signals to quantify tremor, acceleration, and displacement of body sway. Feature selection was implemented to identify the subsets of measures that better characterize the distinctive behavior of PD and control subjects. It was based on different classifiers and on a nested cross validation, to maximize robustness of selection with respect to changes in the training set. Several subsets of three features achieved misclassification rates as low as 5%. Many of them included a tremor-related measure, a postural measure in the frequency domain, and a postural displacement measure. Results suggest that quantitative posture analysis using a single accelerometer and a simple test protocol may provide useful information to characterize early PD subjects. This protocol is potentially usable to monitor the disease's progression
-----------------------------
INTELLIGENT ONLINE MEASUREMENT AND MANAGEMENT OF ENERGY METER DATA THROUGH ADVANCED WIRELESS NETWORK
ABSTRACT
Recently the Electrical supply companies are trying to adopt the electronic measurement of energy consumption data because of reduced manufacturing cost, improved measurement accuracy, increased timely information, miniature size and many other benefits that go well beyond the traditional rotor-plate energy meter type. In this paper with the help of an energy chip, an improved energy metering solution is developed, where automating the progression of measurement through digital wireless communication technique is adopted to get the above benefits along with smooth control. The developed energy meter calculates the total average active power mainly for residential consumers. The hardware circuit accepts single phase voltage and currents as its inputs and provides the output in the form of logic data proportional to the average real power. This data is fed to a remote computer server through the wireless ZigBee network that represents the concept of distant wireless metering, practically involving no manpower. This paper also presents a software solution developed for total electrical energy billing and data management system.
-----------------------------
LED INDICATOR FOR HEART RATE MONITORING SYSTEM IN SPORT APPLICATION
This paper appears in: Signal Processing and its Applications (CSPA), 2011 IEEE 7th International Colloquium on
ABSTRACT
This paper presents a current invention for monitoring the athletes' heart rate during training or exercise session. A bracelet with different color code of Light Emitting Diode (LED) is designed as a wrist heart rate monitor. This color-coding makes the heart rate easier to monitor and enabling the user to know their heart rate range at a certain moment. Our works investigate the used of Zigbee and ANT+ as a transmission medium from transmitter (chest strap) to receiver (bracelet). Different colors signify different ranges of heart rate. Preliminary result demonstrated that it is very helpful for athletes and coaches to monitor the fitness level of athletes and regulate their exercise training regime in a more effective and safer manner
-----------------------------
MODEL-BASED OPTIMAL EFFICIENCY CONTROL OF INDUC-TION GENERATORS FOR WIND POWER SYSTEMS
ABSTRACT
In this paper, a novel control algorithm for optimal operating efficiency of induction generators for wind power generation is presented. The proposed method is based on the flux level reduction, where the flux level is computed from the machine model for the optimum d-axis current of the generator. For the vector-controlled induction generator, the d-axis current controls the excitation level in order to minimize the generator loss while the q-axis current controls the generator torque, by which the speed of the induction generator is controlled according to the variation of the wind speed in order to produce the maximum output power. An experimental setup has been implemented in laboratory to validate the theoretical development. The experimental results show that the loss minimization process is more effective at low wind speed and that the percent of power saving can approach to 25%. Experimental results are shown to verify the validity of the proposed scheme
-----------------------------
MOTION COMPENSATION WITH ONE-AXIS GYROSCOPE AND TWO-AXIS ACCELEROMETER FOR AUTOMOTIVE SAR
ABSTRACT
On the basis of a previous one-axis accelerometer motion compensation system for automotive SAR, an updated scheme is presented in this paper, which contains a one-axis gyroscope and two-axis accelerometer. The requirement for extra Degrees of Freedom (DoF) leads to a new motion signal model. The complete procedure of calculating motion deviation in image display plane (IDP) from the raw roll angle rate and accelerations measured in body frame has been presented. The requirement for the Inertial Measurement Unit (IMU) has been analyzed quantitatively. According to the out-field measurements, the improved motion compensation system can cope with worse road conditions.
-----------------------------
ON-LINE RECOGNITION OF DRIVING ROAD CONDITION USING SUPPORT VECTOR MACHINE
ABSTRACT
A person operating a mobile robot in a remote environment receives a realistic visual feedback about the condition of the road on where the mobile robot is moving. A categorization of the road condition is necessary to evaluate the condition for safe and comfortable driving. For this purpose, the mobile robot should be capable of recognizing and classifying the condition of the road surfaces. In a previous research, author proposed a method to recognize the type of the road surfaces on the basis of the friction between the mobile robot and the road surfaces. The friction is estimated by a reaction torque observer, and a Support Vector Machine (SVM) is used to classify the surfaces. In this paper, SVM is calculated on-line, and multi-class classification is realized. Moreover, the operator is given feedback of haptic information by using mobile-hapto system As a result, the operator is given visual and force feedback about road condition. By experiments, the validity of the proposed method is confirmed.
-----------------------------
OPTIMIZED WIND ENERGY HARVE STING SYSTEM USING RESISTANCE EMULATOR AND ACTIVE RECTIFIER FOR WIRELESS SENSOR NODES
ABSTRACT
This paper presents an optimized wind energy harvesting (WEH) system that uses a specially designed ultra-low-power-management circuit for sustaining the operation of a wireless sensor node. The proposed power management circuit has two distinct features: 1) an active rectifier using MOSFETs for rectifying the low amplitude ac voltage generated by the wind turbine generator under low wind speed condition efficiently and 2) a dc-dc boost converter with resistor emulation algorithm to perform maximum power point tracking (MPPT) under varying wind-speed conditions. As compared to the conventional diode-bridge rectifier, it is shown that the efficiency of the active rectifier with a low input voltage of 1.2 V has been increased from 40% to 70% due to the significant reduction in the ON-state voltage drop (from 0.6 to 0.15 V) across each pair of MOSFETs used. The proposed robust low-power microcontroller-based resistance emulator is implemented with closed-loop resistance feedback control to ensure close impedance matching between the source and the load, resulting in an efficient power conversion. From the experimental test results obtained, an average electrical power of 7.86 mW is harvested by the optimized WEH system at an average wind speed of 3.62 m/s, which is almost four times higher than the conventional energy harvesting method without using the MPPT.
-----------------------------
PERFORMANCE OF POWER LINE COMMUNICATION SYSTEMS WITH NOISE REDUCTION SCHEME FOR SMART GRID APPLICATIONS
This paper appears in: Consumer Electronics, IEEE Transactions on
In this paper, we propose clipping scheme and equalizer as methods to reduce the effects of impulsive noise and channel attenuation in power line communication (PLC) system. Clipping is cutting off the amplitude of the received signal over threshold level without its phase change in order to reduce noise effects. The equalizer compensates for effects of PLC channel. The performance is evaluated in terms of bit error rate (BER). From simulation results, it is confirmed that the proposed clipping scheme has slightly better performance than conventional PLC system. The results of the paper can be applied to PLC systems for smart grid.
-----------------------------
PHYSICAL MOVEMENT MONITORING USING BODY SENSORNETWORKS: A PHONOLOGICAL APPROACH TO CONSTRUCT SPATIAL DECISION TREES
This paper appears in: Industrial Informatics, IEEE Transactions on
ABSTRACT
Monitoring human activities using wearable sensor nodes has the potential to enable many useful applications for everyday situations. Limited computation, battery lifetime and communication bandwidth make efficient use of these platforms crucial. In this paper, we introduce a novel classification model that identifies physical movements from body-worn inertial sensors while taking collaborative nature and limited resources of the system into consideration. Our action recognition model uses a decision tree structure to minimize the number of nodes involved in classification of each action. The decision tree is constructed based on the quality of action recognition in individual nodes. A clustering technique is employed to group similar actions and measure quality of per-node identifications. We pose an optimization problem for finding a minimal set of sensor nodes contributing to the action recognition. We then prove that this problem is NP-hard and provide fast greedy algorithms to approximate the solution. Finally, we demonstrate the effectiveness of our distributed algorithm on data collected from five healthy subjects. In particular, our system achieves a 72.4% reduction in the number of active nodes while maintaining 93.3% classification accuracy.
-----------------------------
An intelligent blind rod and navigation platform based on ZigBee technology
ABSTRACT
This article introduces an intelligent blind rod and navigation platform based on ZigBee technology. This blind rod can detect and analyze the situation on road and warn the blind to avoid obstacles by ultrasonic measurement. The navigation platform based on ZigBee technology can help the blind know different directions the path leads to. This intelligent blind rod can better serve for the blind's independent travel.
-----------------------------
The research on ZigBee-based Mine Safety Monitoring System
ABSTRACT
In this paper the research method of Mine Safety Monitoring System based on ZigBee is elaborated, and the hardware design of ZigBee sensor node and system software design are discussed. The self-organizing routing algorithm for ZigBee networks and the gateway design and systems integration are also studied. ZigBee-based Mine Safety Monitoring System can achieve a variety of safety factors of production, and underground environment (such as gas, temperature, humidity and other environmental indicators) for monitoring, controlling mine production, safety management to provide a good basis for decision making
-----------------------------
A novel three phase energy meter model with wireless data reading and online billing solution
ABSTRACT
Measurement of data electronically leads a combination of benefits that go well beyond the traditional rotor-plate energy meter design. In this paper with the help of an energy chip, an improved novel three phase energy metering solution is developed. Automating the progression of measurement through digital wireless communication technique is done to get high accuracy, smooth control and better reliability. The developed energy meter calculates the total average active power mainly for industrial and commercial applications. The hardware circuit accepts three phase voltages and currents as its inputs and provides the output in the form of serial interfaced data equivalent to the average real power. This serial data is fed to a remote personal computer through the wireless ZigBee network that represents the concept of distant wireless metering, practically involving no manpower. The paper also presents a software solution developed for total electrical energy billing and data management system
-----------------------------
Design of sensor modules of active & intelligent energy-saving system
ABSTRACT
This paper presented new methodology of intelligent energy-saving system to accomplish the goal of real energy-saving from the view-point of system-orient strategy instead of materials. In this system design included sensors of temperature, humidity, luminance, CO2, and power detector (smart outlets) in addition to designing backend intelligent agent technology to quickly response to the feedback control system through hybrid net-work of ZigBee and Bluetooth technology which would sensor the running parameters and environment factors of energy-saving system
-----------------------------
Trial & experimentation of a smart home monitoring system for elderly
ABSTRACT
Smart home monitoring target to improve comfort, quality of life, and safety by monitoring mobility and physiological parameters using wireless sensors. The wireless sensors in a network are capable of performing various tasks and sense many types of information for different applications. This technology has ample potential to change the way we live and work. It has been observed that the population of the elderly people is in a steady raise throughout the world. And the elderly wish to live in their own home as long as possible, however if they prefer to live alone they do however require constant monitoring, so that medical help can be provided immediately in times of dire needs. Surely with the help of wireless sensors based home monitoring there is a better way for these people to resolve this problem. This paper will focus on the characteristics of the sensors for this type of application. Performance of the smart home monitoring system, zigbee radio frequency (RF) communication has been tested. Instead of using huge number of sensor to monitor smart home, an approach of deploying a few but highly accurate numbers of inexpensive smart sensors will be discussed. Also the requirement of the sensor for making a smart sensor network will be reviewed. A typical in-house developed system for home monitoring for elder-care application will be presented.
-----------------------------
Flexible structural power monitoring device with clamp type CT sensors
ABSTRACT
We propose the ZigBee-based clamp type power monitoring system to be applied in various environments. With these properties, it is expected to provide users the intelligent and detailed power management
-----------------------------
A ZigBee Smart Energy Implementation for Energy Efficient Buildings
ABSTRACT
Energy efficiency in buildings is one of the promising fields of application of wireless sensor networks. Simple affordable sensors can be used to monitor the power consumption of appliances in buildings to implement smart algorithms in order to conserve energy. The ARTEMIS Joint Undertaking project eDIANA (Embedded Systems for Energy Efficient Buildings) funded by the European Commission aims to improve energy efficiency in buildings by using embedded technologies. In the eDIANA platform the energy consumed by household or office appliances is monitored by using IEEE 802.15.4/Zigbee-compliant devices. In this paper we describe the prototype that we have developed by using ZigBee Smart Energy Profile in order to realize the eDIANA application scenarios. Moreover we provide latency statistics and packet error rate obtained through our test-bed in different monitoring scenarios
-----------------------------
Flood monitoring of distribution substation in low-lying areas using Wireless Sensor Network
ABSTRACT
In this paper, a novel wireless sensing network node with 2.4 GHz communication and flood detection with 0.02 volt/mm sensitivity is presented for flood monitoring of distribution substation of electrical utilities in low-lying area. The sensor node is as compact as 8 cm × 6 cm and a low power consumption of 860 mW. When a liquid level detector detects an abnormal water level near the substation room, a signal can be transmitted in 115 kbps via a Zigbee module to a control center. It may reduce the risks of damage of the substation and subsequently ensure the power supply safety.
-----------------------------
Voice recognition based wireless home automation system
ABSTRACT
Home Automation industry is growing rapidly; this is fuelled by the need to provide supporting systems for the elderly and the disabled, especially those who live alone. Coupled with this, the world population is confirmed to be getting older. Home automation systems must comply with the household standards and convenience of usage. This paper details the overall design of a wireless home automation system (WHAS) which has been built and implemented. The automation centres on recognition of voice commands and uses low-power RF ZigBee wireless communication modules which are relatively cheap. The home automation system is intended to control all lights and electrical appliances in a home or office using voice commands. The system has been tested and verified. The verification tests included voice recognition response test, indoor ZigBee communication test, and the compression and decompression tests of DPCM (Differential Pulse Code Modulation) speech signals. The tests involved a mix of 35 male and female subjects with different English accents. 35 different voice commands were sent by each person. Thus the test involved sending a total of 1225 commands and 79.8% of these commands were recognised correctly.
Measurement and monitoring of performance parameters of distributed solar panels using wireless sensors network
ABSTRACT
This paper has reported the design and development work of a wireless performance monitoring of distributed solar panel along with automated data logging. The developed system is portable, simple and configured based on the available resources in the laboratory. The system can be extended for wide range of solar cells for material research and development activities. The fabricated system has been used for our research and very satisfactory results are obtained.
-----------------------------
ZigBee/GPS tracking system for rowing races
ABSTRACT
In this paper a ZigBee/GPS Tracking System for Rowing Races is presented. The system provides real-time monitoring of boat position. Potential applications includes, race monitoring, aided-training and safety systems. The system is composed of two main types of modules, Mobile Units equipped with a GPS receiver (in the boat), and a fixed one composed by the Central Unit and the Race Manager, located in the operations room. The communication between the Central and the Mobile units is provided by a point to multipoint ZigBee wireless network. At the current development stage a system prototype was developed and used for testing purposes. Preliminary tests, in order to make a first assessment of system functionalities, were performed in a simulated land environment and the obtained results were promising
-----------------------------
Simulation of earthquakes and tsunami through GSM network
ABSTRACT
Every year thousands of people die because of earthquake occurs in a dangerous place or during a defenseless sleep. Here's a GSM-based seismic alert system that could warn before an earthquake strikes. Earthquakes strike without warning. The resulting damage can be minimized and lives can be saved if people living in the earthquake-prone area are already prepared to survive the strike. This requires a warning before strong ground motion from the earthquake arrival. Such a warning system is possible because of energy wave released at the epicenter of the earth quake travels slower than light. The warning signal from the earthquake epicenter can be transmitted to different places using satellite communication network, fiber-optics network, pager service, Cell phone services or a combination of these. The satellite-based network is ideal when an alert system has to cover a large country like India. For earthquake-prone states like Gujarat, a seismic alert system using the global system for mobile communication network spread throughout the state is proposed here. This system does not try to find the epicenter or fault line caused by the earthquake. It simply monitors the earth vibrations and generates alert signal when the level of earth vibrations crosses a threshold.
-----------------------------
Blind assistant navigation system
ABSTRACT
This paper presents the architecture as well as the implementation of a system that helps blind person navigate independently within an enclosed environment such as the home. The system uses a wireless mesh network to provide the first level localization. It also incorporates additional components to provide more refined location and orientation information. Optimal path planning is done by a server that communicates wirelessly with the portable mobile unit that can be pushed by the blind person. The blind person issues commands and receives direction responses using audio signals.
-----------------------------
Automatic docking system for recharging home surveillance robots
This paper appears in: Consumer Electronics, IEEE Transactions on
ABSTRACT
This paper presents the development and characterization of a surveillance robot with automatic docking and recharging capabilities for home security. The proposed system is composed of a surveillance robot and a docking station. The palm-sized surveillance robot has a triangular shape with three wheels. It communicates with the general wireless home router through WiFi. It communicates with the docking station through ZigBee and serves as a mobile wireless sensor network gateway. The docking station has a trapezoidal structure with an arc-shaped docking interface. A docking method based on the self-localization of the robot and the infrared detectors of the docking station is proposed. The robot can return to the docking station for recharging operations when the on-board battery is too low. The experimental results show that the prototype robot achieved a success rate of 90% after 60 different docking attempts.
-----------------------------
Digital control for home lighting systems with ZigBee communication
ABSTRACT
For the digital control of fluorescent, in candescent and LED lamps, our design contains an integrated lighting controller based on an embedded system, interface circuits, ZigBee communication and a user-friendly GUI on a handheld device.
-----------------------------
Monitoring patients' signs wirelessly
ABSTRACT
Recent developments in off-the-shelf wireless embedded computing boards and the increasing need for efficient health monitoring systems, fueled by the increasing number of patients, has prompted R&D professionals to explore better health monitoring systems that are both mobile and cheap. This work investigates the feasibility of using the ZigBee embedded technology in health-related monitoring applications. Selected vital signs of patients are acquired using sensor nodes and readings are transmitted wirelessly using devices that utilize the ZigBee communications protocols. A prototype system has been developed and tested with encouraging results
-----------------------------
Design of a Wireless Medical Monitoring System
ABSTRACT
This paper provides the design of a Medical Monitoring Terminal use C8051F021 MCU and CC2420 RF chip based on Zigbee technology. The Monitoring Terminal can detect the patient's real-time body temperature, heart rate and other physiological informations, and transmit them to the control center.
-----------------------------
Real time paddy crop field monitoring using Zigbee network
ABSTRACT
Sensors are the essential device for precision agricultural applications. In this paper we have detailed about how to utilize the sensors in paddy crop field area and explained about Wireless Sensor Network (WSN), Zigbee network, Protocol stack, zigbee Applications and the results are given, when implemented the zigbee network experimentally in real time environment. This paper proposed idea about monitoring the crop field area without human interaction. The fundamental concept of this paper is to provide a highly enabled monitoring of crop field. This paper is focus on the sensing and monitoring of the crop field and gives various sensing analyzes in the paddy crop field.
-----------------------------
RF Fingerprinting Physical Objects for Anticounterfeiting Applications
ABSTRACT
Rendering typical RF identification (RFID) tags physically unique and hard to near-exactly replicate by complementing them with unique RF certificates of authenticity (RF-CoAs) can prove a valuable tool against counterfeiting. This paper introduces a new robust RFID system with enhanced hardware-enabled authentication and anticounterfeiting capabilities that relies on the near-field RF effects between a 5 × 5 antenna array and the uniquely modified substrate of the RF-CoAs. A microcontroller-enabled, low-power, and low-cost reader is used to accurately extract the near-field response (“RF fingerprint”) of the certificates meant to complement typical RFID tags in the 5-6-GHz frequency range. The RF characterization of all the reader's components, with an emphasis on the accuracy provided, has been performed. The state diagram of the fast and accurate reader operation is outlined. Rigorous performance and security test results are presented and verify the unique features of this technology.
FIELD TRIALS AND PERFORMANCE MONITORING OF DISTRIBUTED SOLAR PANELS USING A LOW COST WIRELESS SENSORS NETWORK FOR DOMESTIC APPLICATIONS
ABSTRACT
Use of solar panel is gaining an ever increasing foothold in society, especially on the roof of the houses for feeding domestic electrical appliances in recent times. In many situations the expensive solar panels stop working due to some external nuisances which goes unnoticed to the users. There is a need of a low-cost monitoring system to get information of the defected solar panels for timely repair and maintenance. The design, development and trial work of a performance monitoring system of distributed solar panels along with automated data logging based on a low-cost wireless sensors network has been reported to help the current situation. The developed system can be used up to 146 V and 15.5A solar cell systems with automatic selection of best resolutions. The system can be extended for wide range of solar cells for material research and development activities. The fabricated system has been used for field trials and very satisfactory results are obtained.
-----------------------------
TORSIONAL-VIBRATION ASSESSMENT AND GEAR-FAULTDIAGNOSIS IN RAILWAY TRACTION SYSTEM
ABSTRACT
The diagnosis of mechanical faults in railway traction systems (RTSs) has a significant importance on both safety and reliability, which can avoid train crashes. This paper deals with torsional-vibration assessment and gear-fault diagnosis in the mechanical transmission of a high-speed RTS by a fully noninvasive technique. Previous studies on a simple gearbox-based electromechanical system have shown that the influence of gearbox torsional vibrations on the torque and on the stator-current signatures are obvious. The aim of this paper is to demonstrate that the traction motor can be considered as a torque sensor through its electromagnetic-torque estimation for torsional-vibration monitoring without any extra mechanical sensor. The effects of both tooth-damage and surface-wear faults at the output wheel on the stator current and on the estimated electromagnetic torque have been investigated. The results of the estimation are compared with the measured mechanical torque and validated through a reduced-scale RTS in both stationary and nonstationary conditions.
-----------------------------
Design and Implementation for Ambulance Route Search Based on the Internet of Things
ABSTRACT
The internet of things (IoT) is a network to realize interconnects between almost any object and web services. It can be applied in many domains, such as radio frequency identification (RFID), wireless sensor network(WSN) and so on. The application of IoT brings us the higher efficiency and the more convenient life. In this paper, we propose a new IoT application framework to search the optimal routes for the ambulances with taking into account the effects for the traffic in the ambulance running time. In this system, with the help of the RFID tags in the ambulances and wireless sensor nodes on the roads, the dispatch control center in the hospital can collect the real-time traffic conditions where wireless sensor nodes locates. The report messages are sent to the control center by the multi-hop method. Based on the information coming from sensor nodes, the control center forecasts the optical path to provide the fastest route for the ambulances. In this decision process, the control center will ignore some information from the nodes, which have higher traffic jam than the average. Experimental results show that our system can provide the best route to the ambulances. And it also has the more potential applications in wide areas.
-----------------------------
WEIGHING SYSTEM OF FRUIT-TRANSPORTATION GYROCAR BASED ON ARM
The pilot less fruit-transportation gyro car works in the economic forest, avoiding the obstacle on the rail is the prerequisite of its safe working. An ultrasonic obstacle avoidance system of fruit-transportation gyro car based on ARM embedded system is introduced in this article. The functions of the system are implemented. It could make the gyro car stop when detect an obstacle and sends the information of obstacle to the monitoring client through GPRS. Through the test, the ultrasonic obstacle avoidance system performs well and reliable.
-----------------------------
VEHICLE INFRASTRUCTURE INTEGRATION SYSTEM USING VISIONSENSORS TO PREVENT ACCIDENTS IN TRAFFIC FLOW
ABSTRACT
This study describes the development of a vision sensor for detecting shock waves which is one of the main factors of accidents in highway traffic flow. The major contributions of this research are development of vehicle tracking and detection of shock wave in saturated traffic. Moreover, realisation of a vehicle infrastructure integration (VII) system for providing arrival information of such propagation to drivers is proposed. The experiment on the analysis of the propagation with the developed image sensor has shown that an error might occur in the arrival time information of the propagation provided to the driver. Therefore a prediction technique at the arrival time of the propagation is integrated in the authors' system. By using this prediction technique and taking the error tolerance of drivers into account, the experimental results show that prediction success rates are improved by about 5%.
-----------------------------
LOCON: A LOCATION BASED SERVICES PLATFORM TO IMPROVE AIRPORT SAFETY
ABSTRACT
Location and context awareness services have generated a lot of interest in the recent years, becoming a key feature to many applications of mobile devices. The rapid development in wireless communications and in satellite navigation systems also contributed to the popularity of location based services. The location technologies when properly combined can provide valuable event driven services to notify users about ongoing occurrences, creating important advances in surveillance activities. This is particularly relevant for operational environments where surveillance of surface movement's through electronic means represents a major challenge. Although advantages in location based services have opened up new perspectives at validating safety and security requirements in environments such as airports, harbours, or industrial plants, there are, however different ways to look at these services to provide location awareness. This paper presents a contribution developed in an European research project called LocON that implements a generic platform to provide a set of location based services using different wireless location technologies. The location awareness provided by the LoCON platform relies on multiple location-based technologies which cooperate at providing the data to a middleware layer. Based on a data fusion process the positioning data are passed to the application layer enabling operational decision makers to monitor and track events according to business logic. LocON is being tested at Faro airport in Portugal to validate how well it can improve airport safety and security procedures.
-----------------------------
PV POWER SYSTEM ENERGY CONTROL RESEARCH IN MICRO GRID
ABSTRACT
Micro-grid technology can integrate the advantages of distributed generation power system, to provide users with quality and reliable electricity. This paper designs the photovoltaic system which is short for PV based on the energy storage structure which not only analyses the energy flow direction of the charging and discharging circuit, but also designs the control strategy of charging and discharging system in detail. Through modeling and simulating by PSCAD platform, micro-grid will strongly shows a good effect on improving power quality.
-----------------------------
CONTROL OF BRUSHLESS DC MOTOR WITH AN AVR MICROCONTROLLER
ABSTRACT
This paper illustrates the basic work principle of a brushless DC motor and presents its control method. According to the method, a control system of a brushless DC Motor is designed using an AVR microcontroller. Design of the control system includes hardware circuit designing and software programming. The hardware structure of the control system consists of a microcontroller ATmega64, power supply circuit, position detection circuit, current chopper circuit, power driving circuit, display circuit and keyboard circuit and so on. The software is developed by c program language. The software includes main program, initialization program, PWM duty ratio reload program, speed calculation program, closed-loop PID regulation program, interrupt service program, LCD display program, keyboard program etc. The experiment result shows that the system is with an excellent dynamic and static performance. Its operation is reliable.
-----------------------------
A SCHEME FOR THE APPLICATION OF SMART MESSAGE LANGUAGE IN A WIRELESS METER READING SYSTEM
ABSTRACT
In order to solve the problems of the communication among various metering devices in the traditional wireless meter reading system, Smart Message Language (SML) which is the definition of the German national standard for Automatic Meter Reading System is introduced. In this paper, the Wireless Meter Reading system is developed based on WI-FI, with the monitoring terminal of the hardware platform made up of Marvell 88W8686, the ARM7 processor and peripheral circuits, using µC/OS-II operating system and LwIP protocol. VC++ and MDB database is used to develop a management software. SML protocol is adopted to design the format of the data frame to create a unified data structure for data procurement. This system archives the function of reading meter data from hardware, data processing and storage. The experiment result proves that this type of data structure improves the transmission efficiency and the performance of the system and is suitable for implementation in low-power embedded systems.
-----------------------------
HARDWARE–SOFTWARE CODE SIGN OF AUTOMATIC SPEECH RECOGNITION SYSTEM FOR EMBEDDED REAL-TIME APPLICATIONS
ABSTRACT
We present a hardware-software coprocessing speech recognizer for real-time embedded applications. The system consists of a standard microprocessor and a hardware accelerator for Gaussian mixture model (GMM) emission probability calculation implemented on a field-programmable gate array. The GMM accelerator is optimized for timing performance by exploiting data parallelism. In order to avoid large memory requirement, the accelerator adopts a double buffering scheme for accessing the acoustic parameters with no assumption made on the access pattern of these parameters. Experiments on widely used benchmark data show that the real-time factor of the proposed system is 0.62, which is about three times faster than the pure software-based baseline system, while the word accuracy rate is preserved at 93.33%. As a part of the recognizer, a new adaptive beam-pruning algorithm is also proposed and implemented, which further reduces the average real-time factor to 0.54 with the word accuracy rate of 93.16%. The proposed speech recognizer is suitable for integration in various types of voice (speech)-controlled applications.
IMPLEMENTING ZIGBEE PROTOCOL AS ASSIGNMENTS IN TEACHING EMBEDDED SYSTEMS
ABSTRACT
In Computer Engineering 2b, one of the Level 7 courses in the Bachelor of Engineering Technology programme offered at Christchurch Polytechnic Institute of Technology, a “real world” project is always used as assignments for teaching and assessment. In the recent years, one of these assignments is to implement the ZigBee protocol in the in-house developed micro controller training kit. Involving emerging technologies of the wireless sensor control network in the assignment has stimulated students' interest, not only in embedded systems but also in other areas such as wireless communications.
-----------------------------
DISCUSSIONS ON ACCESSIBILITY IN INDUSTRIAL AUTOMATION SYSTEMS
ABSTRACT
Importance of industrial automation systems [1], also known as technical devices, has been a growing area during the past decades. Web applications from one side and industrial automation systems from the other side have become a standard part of people's daily life and more user groups have to deal with them. Hence they must be accessible to all users. Unfortunately, often by the development of such systems, certain user groups are being neglected. Therefore, a systematic concept is required to support the development of industrial automation systems and Web applications. In this paper, we will present the concept, which is proposed in the context of a research project funded by Deutsche Forschungsgemeinschaft (DFG)a. We will discuss the suited methods to effectively assess accessibility requirements.
-----------------------------
COMPARISON OF EMBEDDED SYSTEM DESIGN FOR INDUSTRIAL APPLICATIONS
ABSTRACT
This paper presents a survey on embedded systems design and applications. Several platforms for embedded systems, including microcontrollers, microprocessors, field-programmable gate arrays, digital signal processors, and application-specific integrated circuits are discussed and compared. A survey of embedded system-based industrial applications is presented. Examples of real-life design decisions specific to development of such systems are also presented. The carefully selected three design case study examples include industrial control of wind tunnel with emphasis on actuator control, a mobile robot navigation system with emphasis on integration and synchronization of several subsystems, and optimized implementation of computationally intensive control system on a small microcontroller system.
-----------------------------
DESIGN OF ON-LINE INTERACTIVE DATA ACQUISITION AND CONTROL SYSTEM FOR EMBEDDED REAL TIME APPLICATIONS
ABSTRACT
Design of on-line embedded web server is a challenging part of many embedded and real time data acquisition and control system applications. The World Wide Web is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billion of users worldwide and allows the user to interface many real time embedded applications like data acquisition, Industrial automations and safety measures etc,. This paper approached towards the design and development of on-line Interactive Data Acquisition and Control System (IDACS) using ARM based embedded web server. It can be a network, intelligent and digital distributed control system. Single chip IDACS method improves the processing capability of a system and overcomes the problem of poor real time and reliability. This system uses ARM9 Processor portability with Real Time Linux operating system (RTLinux RTOS) it makes the system more real time and handling various processes based on multi tasking and reliable scheduling mechanisms. Web server application is ported into an ARM processor using embedded `C' language. Web pages are written by Hyper text markup language (HTML); it is beneficial for real time IDACS, Mission critical applications, ATM networks and more.
-----------------------------
DATABASE DESIGN ON EMBEDDED HOME GATEWAY AND WEB SERVER IMPLEMENTATION
ABSTRACT
This paper analyzes database requirement of embedded development and embedded Web server, combines with the database design on embedded home gateway using SQLite architecture, and implements the SQLite embedded database on home gateway. Web server is successfully ported, and embedded Linux operation system is ported to home gateway platform.
-----------------------------
A SYSTEM FOR THE DYNAMIC CONTROL AND THERMAL CHARACTERIZATION OF ULTRA LOW POWER GAS SENSORS
ABSTRACT
This paper describes a system for the simultaneous dynamic control and thermal characterization of the heating and cooling phases of an ultralow-power (ULP) micromachined sensor, featuring thermal characteristics that are quite similar to those of innovative ULP semiconducting metal-oxide gas sensors. A pulsewidth-modulated (PWM) excitation system has been realized using a microcontroller featuring an ARM7 core to characterize the thermal behavior of a device formed by a Pt microheater and a Pt temperature sensor, over an insulating membrane. Three operating modes, i.e., constant target heater resistance, constant heating power, and cooling phase monitoring, were implemented. Objectives of the research were to analyze the relation between the time period and duty cycle of the PWM signal and the operating temperature of such ULP micromachined systems, to observe the thermal time constants of the device during the heating and cooling phases, and to measure the total thermal conductance. Experiments indicated that an approximately constant heater temperature in the constant target heater resistance regime (i.e., after the initial thermal transient due to the heating algorithm) can only be obtained if the time period of the heating signal is smaller than 50 µs, i.e., much faster than the time constant of the device. Constant power experiments show quantitatively a unique time constant t for both the heater and the temperature sensor (T-sensor) in the heating phase (with a known applied power) and the cooling phase (with zero power). This time constant decreases during heating in a range of 2.3-2 ms as a function of an increasing temperature rise ?T between the ambient and the operating temperature. Moreover, we observed that, in the chosen operating temperature range, the thermal conductance is a linear function of ?T. Finally, repeatability of experimental results was assessed by guaranteeing that the standard deviation of the controlled temperature was within ±5.5°C in worst-case conditions.
-----------------------------
IMPLEMENTATION OF IN-VEHICLE MULTI-SENSOR INFORMATION FUSION GATEWAY FOR COOPERATIVE DRIVING
Active safety is an important feature of a modern vehicle to provide precaution warning or compensatory control before the pre-crash stage of vehicle safety. All vehicle signals and information are acquired by several in-vehicle sensors on ECUs or surrounding vehicles, and integrated in vehicle gateway through in-vehicle or vehicle-to-vehicle communications. The information exchanged among the host and surrounding vehicles provides comprehensive vehicle and driving status of each vehicle, so the driver can drive more safely with the cooperative driving mechanism. The demonstration system consists of a vehicle gateway, which is based on a heterogeneous multi-core processor, consisting of one ARM core for I/O control and system management and two DSP cores for intensive computation of information fusion. After reaching within the communication limit, the vehicles set up time synchronization and then exchange vehicle information. The acquired sensor data and received vehicle information are time aligned and fed into PAC DSPs for information fusion, which consists of four phases, signal processing, location mapping, trajectory prediction and risk assessment. The risk assessment evaluates the probability of car crash and broadcast the warning message to its surrounding vehicles, if the risk level is raised beyond a threshold. The cooperative driving is fulfilled by sharing the vehicle information and emergency warning through wireless communication, so a driver can be aware of the dangerous situation and also be suggested an adequate response earlier.
-----------------------------
THE RESEARCH ON OPTIMAL PARKING SPACE CHOICE MODEL IN PARKING LOTS
ABSTRACT
In order to deal with the parking guidance issue of the parking guidance and information system in the parking lots, the behavior of choosing parking space was analyzed to build the optimal parking space choice model in the parking lots. Based on the specific situation of the parking lots, the habits and preferences of the drivers when parking their cars were all taken into consideration in this model. After summarizing the key factors which may influence drivers' parking space choice, a multiple attribute decision parking model is proposed to help PGIS in the parking lots choose the optimal parking space for drivers. A case is presented to verify the proposed model. The results show that the model can choose the optimal parking space and provide effective guidance for drivers. It can also take the drivers less time to find the parking space and it will take great help to the intelligent management for the parking guidance and information system, too.
-----------------------------
MONORAIL CAR’S WIRELESS CONTROL SYSTEM BASED ON SMARTPHONE PLATFORM
ABSTRACT
To meet the mountainous districts situation in China, this paper introduces a monorail car's wireless control system used in orchard which is based on smart phone and GPRS wireless communication technology. The system can obtain monorail car's speed and position information by rotary encoder, control and transmit data by wireless communication. A SMS module on Windows Mobile Embedded OS 6.1 is developed based on GSM protocol system. Smart phone can receive car's initial information and send orders to the on-vehicle controller for operating the car by GSM message. It describes how the hardware platform works and how to accomplish the design with software. Meanwhile, it tests the data transmission time and makes improvement. The rational design makes it easier to operate, which is proved to be available by tests.
-----------------------------
MEASURING NEUROMUSCULAR CONTROL DYNAMICS DURING CAR FOLLOWING WITH CONTINUOUS HAPTIC FEEDBACK
ABSTRACT
In previous research, a driver support system that uses continuous haptic feedback on the gas pedal to inform drivers of the separation to the lead vehicle was developed. Although haptic feedback has been previously shown to be beneficial, the influence of the underlying biomechanical properties of the driver on the effectiveness of haptic feedback is largely unknown. The goal of this paper is to experimentally determine the biomechanical properties of the ankle–foot complex (i.e., the admittance) while performing a car-following task, thereby separating driver responses to visual feedback from those to designed haptic feedback. An experiment was conducted in a simplified fixed-base driving simulator, where ten participants were instructed to follow a lead vehicle, with and without the support of haptic feedback. During the experiment, the lead vehicle velocity was perturbed, and small stochastic torque perturbations were applied to the pedal. Both perturbations were separated in the frequency domain to allow the simultaneous estimation of frequency response functions of both the car-following control behavior and the biomechanical admittance. For comparison to previous experiments, the admittance was also estimated during three classical motion control tasks (resist forces, relax, and give way to forces). The main experimental hypotheses were that, first, the haptic feedback would encourage drivers to adopt a “give way to force task,” resulting in larger admittance compared with other tasks and, second, drivers needed less control effort to realize the same car-following performance. Time- and frequency-domain analyses provided evidence for both hypotheses. The developed methodology allows quantification of the range of admittances that a limb can adopt during vehicle control or while performing a variety of motion control tasks. It thereby allows detailed computational driver modeling and provides valuable information on how to design an- - d evaluate continuous haptic feedback systems.
MOBILE ROBOT FOR OVERHEAD POWER LINE INSPECTION AND A CONTROLLING METHOD FOR OBSTACLE AVOIDANCE
ABSTRACT
This paper designs a mobile robot for overhead powerline inspection and a controlling method for obstacle avoidance, which is composed of three suspender arm with the three-coordinate rolling wheel machine, three-node CAN bus system and wireless image transmission with CCD. The suspender arm includes the straight line synchro-strap rail bar for mobile in breadth, the gear-rack machine for moving horizontally, the synchro-strap rail bar for moving vertically and the driving machine with a rolling wheel. Every suspender arm can move in three right-angle coordinate direction through the motor with a photoelectric coder,in which the sensors are built for the purpose of detecting the obstacles such as the quakeproof bar, line clamp and down-lead etc. The controlling system can realizes the whole robot machine rolls along the powerline in a long distance and avoids obstacles automatically by driving relevant motor for suspender arm's three-coordinate moving based for program after analyzing the inputting sensors' signal including the sensors for detecting the obstacles and photoelectric coders.
-----------------------------
THE IMPLEMENTATION OF THE INTELLIGENT TRANSPORT SYSTEM FOR THE REAL-TIME ROADSIDE ENVIRONMENT INFORMATION TRANSFER
ABSTRACT
The paper proposed a novel system “RTCS (Real-Time Control System for road environment)” to prevent accidents of drivers. This paper deployed sensors on roads and used these sensors to collect information to coordinators. How to use sensors to prevent accidents in vehicular environment is an interesting issue. Vehicles are equipped with OBU (On-Board Unit) and use the OBU to query information if the coordinator or RSU (Road-Side Unit) is located in its communication range. This system also distributed events into different priority due to the different damages. For your example, RSU collects and analyzes the roadside information for the driver's safety and which provides to an OBU and a management system according to the service priority. In the higher rank terminal, the developed IP-based set-top box application provides information such as the traffic information, road environmental information, environmental sensor station error, and etc. The system has a high potential to improve traffic in two ways. First, it collects local environmental data and passes it to a central facility to further process it and pass it to vehicles. Second, it takes care that urgent local information is passed directly and thus quickly to local vehicles which increases traffic safety. The paper presents architecture to connect a USN (Ubiquitous Sensor Network) with the ITS (Intelligent Transport System) consisting of connected OBU and RSU. The goal of the system is to provide the ITS with local environmental data gathered by the USN nodes.
-----------------------------
REAL TIME PADDY CROP FIELD MONITORING USING ZIGBEE NETWORK
ABSTRACT
Sensors are the essential device for precision agricultural applications. In this paper we have detailed about how to utilize the sensors in paddy crop field area and explained about Wireless Sensor Network (WSN), Zigbee network, Protocol stack, zigbee Applications and the results are given, when implemented the zigbee network experimentally in real time environment. This paper proposed idea about monitoring the crop field area without human interaction. The fundamental concept of this paper is to provide a highly enabled monitoring of crop field. This paper is focus on the sensing and monitoring of the crop field and gives various sensing analyzes in the paddy crop field.
-----------------------------
A ZERO CONFIGURED HOMECARE GATEWAY USING ZIGBEE
ABSTRACT
This paper presents a zero configuration HomeCare gateway which enables the remote patient monitoring. The proposed solution facilitates the automatic service discovery from ZigBee medical sensor network and also the doctor could adjust the monitoring configuration by uploading a new service profile to telemedical platform. It is believe that the proposed solution could achieve win-win situation for both patient and doctor.
-----------------------------
A pragmatic approach to aid visually impaired people in reading, visualizing and understanding textual contents with an automatic electronic pen
ABSTRACT
Blindness is an obstacle that is not even comprehendible for the non-blind. Many day-to-day activities may become challenging, complicated and may require much more labor for those with eye-sight problems or blindness. One of the major problems they face is understanding visual or text information which are not in the Braille form. Not every written or printed document that a blind person would like to read is available in Braille. A blind cannot read any of the handwritten documents. They feel it very difficult, while someone has to read it for them. This is the fundamental issue that we deal with, and try to solve, with a new piece of technology, which is essentially an automated text-to-audio converting pen. According to this keynote concept, any piece of text that a person would like to read/understand is converted to an audio signal. This audio signal is transmitted to the person's ears through wireless technology such as ZigBee. Since this technology is in the form of a pen, it is very convenient to use and is also portable. This instrument is radical and can definitely be a empowering force in a blind person's life, and can be helpful in relieving them of their frustration of not being able to read whatever they want, thus making their life easier.
-----------------------------
EVIDENCE COLLECTION FROM CAR BLACK BOXES USING SMART PHONES
ABSTRACT
This demonstration shows a process to collect critical video clips from car black boxes using smart phones. Critical video clips in the black box are hashed to provide data integrity before being transmitted to the police server. Without VANET infrastructure, smart phones are very useful communication media for car black boxes.
-----------------------------
DESIGN OF ULTRASONIC OBSTACLE AVOIDANCE SYSTEM OF FRUIT-TRANSPORTATION GYRO-CAR BASED ON ARM
ABSTRACT
The pilotless fruit-transportation gyrocar works in the economic forest, avoiding the obstacle on the rail is the prerequisite of its safe working. An ultrasonic obstacle avoidance system of fruit-transportation gyrocar based on ARM embedded system is introduced in this article. The functions of the system are implemented. It could make the gyrocar stop when detect an obstacle and sends the information of obstacle to the monitoring client through GPRS. Through the test, the ultrasonic obstacle avoidance system performs well and reliable.
-----------------------------
INTELLIGENCE MONITORING SYSTEM BASED ON ARM AND INFORMATION FUSION
ABSTRACT
Since some of the ARM not directly connected with the Internet system. A kind intelligence monitoring system based on 32 bit ARM processor LPC2138 and information fusion technology was provided. ARM has advantages of high integration and powerful information processing capability. The system is composed of LPC2138 processor, external RAM, Flash, LCD and With DM9000A interface chip for system configuration network communication interface. Its OS is embedded in Linux operating system
-----------------------------
DESIGNING A PH DATA ACQUISITION & LOGGING DEVICE USING AN INEXPENSIVE MICROCONTROLLER
ABSTRACT
Accurate measurement and analysis of pH data is required for a multitude of applications ranging from the agricultural sector to clinical laboratories. In many of these applications an inexpensive hand-held unit is needed. This paper describes a low cost and low power pH sensing and data logging system using a Renesas microcontroller and pH sensor. This paper describes the sensor data acquisition and data logging system including details of its construction, capabilities and applications.
SMART CARD WITH IRIS RECOGNITION FOR HIGH SECURITY ACCESS ENVIRONMENT
ABSTRACT
Smart cards are increasingly being used as a form of identification and authentication. One inherent problem with smart cards, however, is the possibility of loss or theft. Current options for securing smart cards against unauthorized use are primarily restricted to passwords. Passwords are easy enough for others to steal so that they do not offer sufficient protection. This has promoted interest in biometric identification methods, including iris recognition. The iris is, due to its unique biological properties, exceptionally suited for identification. It is protected from the environment, stable over time, unique in shape and contains a high amount of discriminating information. This paper proposes a method to integrate iris recognition with the smart card to develop a high security access environment. An iris recognition system and smart card programming circuit with its software have been designed. Template on card (TOC) category has been employed. Hence, the extracted iris features stored in smart card are compared against the data acquired from a camera or database for authentication. The proposed algorithm has superior performance in terms of security, accuracy and consistency compared with other published technology.
-----------------------------
DESIGN OF A WIRELESS MEDICAL MONITORING SYSTEM
ABSTRACT
This paper provides the design of a Medical Monitoring Terminal use C8051F021 MCU and CC2420 RF chip based on Zigbee technology. The Monitoring Terminal can detect the patient's real-time body temperature, heart rate and other physiological informations, and transmit them to the control center.
-----------------------------
SYSTEM LEVEL DESIGN OF A SECURE HEALTHCARE SMART CARD SYSTEM
ABSTRACT
Smart card-based healthcare system has several advantages over conventional paper-based systems in terms of security, privacy and portability. In this study, a secure health care smart card system was designed and simulated. The goal of the project is to design a smart card system which will meet the major requirements of a healthcare identity system. Main features of the proposed system are data storage and secure data transfer. The system is a heterogeneous system with hardware and software components and it was designed using electronic system-level design methodology (ESL) with a top-down approach. It consists of cryptographic primitives, a central processing unit and memory blocks. RSA and AES are used for key share and encryption, respectively. An LFSR is employed to generate pseudo-random numbers which are used for calculating keys. We have used Aldec Active-HDL Student Edition to develop the system and perform mixed-language simulations. We have functionally verified the system using Active-HDL.
-----------------------------
COMPUTING TECHNOLOGY USED IN RETRIEVAL OF PATIENT’S RECORD
ABSTRACT
The majority of healthcare workers in hospitals continue to record, access and update important patient information using paper charts. Disparate patient data (clinical information, laboratory results and medical imagery) is entered by different caregivers and stored at different locations around the hospital. This is a cumbersome, time consuming process that can result in critical medical errors such as documents being mislaid or prescriptions being misinterpreted due to illegible handwriting. Hospitals everywhere are moving to integrate health data sources using Electronic Health Record (EHR) systems as well as taking advantage of the flexibility and speed of wireless computing to improve the quality and reduce the cost of healthcare. We are developing a mobile application that allows doctors to efficiently access accurate real-time patient information at the point-of-care. The system can assist caregivers in automatically searching through very large repositories of previous patient cases as increasingly large hospital databases are making manual searches of such information unfeasible. The system performs computational prognosis by providing decision support for pre-screening of medical diagnosis. A presenting patient's symptoms can be input to a portable device and the application can quickly retrieve the most similar profiles with known diagnoses from large databases which can be used to compare treatments, diagnosis, test results and other information.
-----------------------------
BLIND CONSTELLATION ESTIMATION AND DETECTION USING CLUSTER ANALYSIS
ABSTRACT
This paper presents a blind soft-output modulation decoder for signals transmitted wirelessly using any constellation configuration. The receiver algorithm operates by classifying the received symbols into probabilistically alike clusters which are ultimately used to estimate the underlying modulation constellation points and also soft information about the received signal.
-----------------------------
THE DESIGN AND IMPLEMENTATION OF A TEACHER-STUDENT INTERACTION SYSTEM BASED ON ZIGBEE AND RFID
ABSTRACT
Based on analysis of features of ZigBee Wireless sensor networks and RFID technology, we implemented a protocol stack of ZigBee using method of module dividing. From the perspective of improving teaching methods, combining teaching practices, a teacher-student interaction system based on ZigBee and RFID technology was designed and implemented for the application of actual teaching. Results show that the system achieved the basic functions of a teacher-student interaction system.
-----------------------------
THE SOLUTION OF HYBRID ELECTRIC VEHICLE INFORMATION SYSTEM BY MODBUS PROTOCOL
ABSTRACT
This paper introduces the hybrid electric vehicle information system, which is realized by modbus protocol. Using a remote terminal control unit (RTU) with EVEW touch-screen, the system achieves the communication between electronic control units (ECU) and the RTU by means of the modbus protocol at the baud rate 38400kb/s, and it finishes the task of human-machine exchange. Hybrid electric vehicle control unit uses dual-core processors: the host processor and the coprocessor XGATE. XGATE can reduce the load on the host processor, which makes the host processor timely response to a number of hybrid control tasks, and it improves the requirements of real-time in hybrid control system. In addition, because modbus protocol has opening characteristics, most of serial communication controllers support the protocol. Therefore, the system can be applied in the serial communication with modbus protocol.
-----------------------------
HYBRID WIRELESS COMMUNICATION SYSTEM USING ZIGBEE AND WIFI TECHNOLOGY IN THE COALMINE TUNNELS
ABSTRACT
Wireless Sensor Network (WSN) used under the coalmine tunnel is an emerging area of research that promises to provide reliable and flexible communication. This paper first discussed the best working frequency about the WSN in coalmine. Then, according to the actual circumstances of coal mine, the network structure should adopt cluster-tree topology. We also develop a multifunction communication wireless system using ZigBee and WiFi technology, which can achieve the functions of gas monitoring, wireless communication, personnel management and video surveillance, etc. Practical applications showed that the multifunction communication system can satisfy the need of dispatch communication and safety monitor in the coal mine tunnel.
-----------------------------
DEVELOPMENT OF ROAD LIGHT GATEWAY WITH SENSOR NETWORK
ABSTRACT
In this paper, we have developed the gateway for multi-information convergence system in ubiquitous sensor network. The gateway gathers the various sensor data from a road light device, and the data is transmitted into an energy management system. The sorts of data are the intensity of illumination, humidity and diagnostic results.
-----------------------------
DESIGN OF MONITOR-AND-CONTROL SYSTEM FOR SUPERMARKET FRESH AREA BASED ON ZIGBEE
ABSTRACT
According to the status that most of supermarkets can't effectively monitor the temperature and humidity around food of fresh area in our country Currently, the thesis designs a hierarchical topology central monitoring system based on ZigBee wireless sensor network (WSN). In the system, the temperature and humidity of surveyed area can be automatically monitored and controlled. The monitoring nodes, with the CC2430 chip and THS11, can collect and upload temperature and humidity data to the Management Centre, which displays and processes the data, through the central node and the RS-232 interface. If the collected data exceeds the threshold, it automatically starts the alarm system and the regulating system; while the data is lower than the standard value, regulating system could be automatically shut down. Nodes work in the regular query power saving mode. Power is obtained from button cells conversion through MAX687. The results reveal that this WSN system has the potential for field applications due to its low cost, low power and flexible networking construction.
-----------------------------
VOICE OVER ZIGBEE NETWORKS WITH ENVIRONMENTAL MONITORING
ABSTRACT
ZigBee technology is being embedded in a range of applications up to smart energy, healthcare, and telecommunication services. In this paper, we present a voice transmission system, one of telecommunication value-added services, based on the low-rate ZigBee networks. We design a model to perform a sensor role as a member of ZigBee networks in addition to providing the cost-effective voice transmission function.
HIGH-VOLTAGE PULSE POWER SUPPLY CONTROLLER BASED ON ARM7
ABSTRACT
High-voltage pulse power supply technology is a new effective improvement in electric dust precipitation. A High-voltage pulse power supply controller based on ARM7 is present in this paper. Which can output pulse width modulation in frequency of 20~50 KHz with the duty cycle of 12% to 50%. µC/OS- operation system was applied. The implementation of hardware and operation system is introduced. Experiments have shown the feasibility and reliability.
-----------------------------
A TEST BED FOR ANALYZING SECURITY OF SCADA CONTROL SYSTEMS (TASSCS)
ABSTRACT
The critical infrastructures of our society are in the process of being modernized. Most significantly impacted are the industrial control systems through replacement of old electromechanical systems with advanced computing and communication technologies. This modernization has introduced new vulnerabilities to those infrastructures. Securing critical infrastructures is a challenging research problem, as these control systems were not designed with security in mind. This paper presents a testbed designed to study and simulate the various available techniques for securing and protecting Supervisory Control and Data Acquisition (SCADA) systems against a wide range of cyber attacks. The testbed is also used to evaluate the detection rate, false alerts and effectiveness of the protection techniques. We present preliminary results on using the testbed to detect a selected set of cyber attacks and the impact of the protection techniques on the operations of the system.
-----------------------------
SUPPORT VECTOR MACHINE BASED DATA CLASSIFICATION FOR DETECTION OF ELECTRICITY THEFT
ABSTRACT
Most utility companies in developing countries are subjected to major financial losses because of non-technical losses (NTL). It is very difficult to detect and control potential causes of NTL in developing countries due to the poor infrastructure. Electricity theft and billing irregularities form the main portion of NTL. These losses affect quality of supply, electrical load on the generating station and tariffs imposed on electricity consumed by genuine customers. In light of these issues, this paper discusses the problems underlying detection of electricity theft, previously implemented ways for reducing theft. In addition, it presents the approximate energy consumption patterns of several customers involving theft. Energy consumption patterns of customers are compared with and without the presence of theft. A dataset of customer energy consumption pattern is developed based on the historical data. Then, support vector machines (SVMs) are trained with the data collected from smart meters, that represents all possible forms of theft and are tested on several customers. This data is classified based on rules and the suspicious energy consumption profiles are grouped. The classification results of electricity consumption data are also presented.
-----------------------------
ENERGY DIVERSIFICATION AND SUSTAINABLE ECONOMY GROWTH
ABSTRACT
Energy diversification is very important to the sustainable economy growth. In this paper we develop an endogenous growth model and analyze some major relationship between the energy diversification and sustainable economy growth. The dynamic optimization results of the model show that the technology progress will make great contributions to the energy diversification and the specialized energy R&D plays an important role in the energy diversification process, which can accelerates energy supply source expansion. Propelled by the specialized energy R&D, energy diversification will redistribute the labor force among different sectors, offset the adverse effects of diminishing marginal return of factors, and help economy step into sustainable growth e entually.
-----------------------------
DEVELOPING AND INSTALLING SUBSTATIONS FOR OIL AND GAS FACILITIES IN VERY COLD AND REMOTE LOCATIONS
ABSTRACT
Oil and gas companies are venturing into colder, more remote locations in their search for attainable oil and gas reserves. In many instances, extracting these “harder to reach” reserves requires power intensive unconventional methods. Heaters, drill rigs, compressors, pumps, and other exploration and production equipment required for the exploration and production operations can amount to hundreds of megawatts. To supply these large loads, oil and gas companies are using electric power at higher voltage levels and installing their own transmission and distribution substations and, in some cases, their own transmission and distribution network. Historically, substation designs were based on previous engineering experience and knowledge. Given the challenges associated with frontier extreme weather locations, defaulting to traditional designs may be a flawed approach. This paper discusses different aspects to consider in the development and installation of remote high-voltage substations in very cold conditions, with emphasis on a few key criteria: personnel safety and environmental issues, reliability and availability, low maintenance, remote monitoring and control, equipment and material suitable for cold environment, and cost effectiveness. Other considerations such as unique end-user requirements, qualified labor resources, logistics challenges, and cost optimization will also be discussed. A methodology incorporating the aforementioned factors will be offered for selecting a substation solution for a large oil and gas facility in a cold and remote location.
-----------------------------
CONTROL LAYER FOR MULTI-VENDOR INDUSTRIAL ROBOT INTERACTION PROVIDING INTEGRATION OF SUPERVISORY PROCESS CONTROL AND MULTIFUNCTIONAL CONTROL UNITS
ABSTRACT
Based on recent industrial needs for a flexible integration of supervisory control systems and novel intuitive manual control units a new control layer is introduced. The control layer affords adaptive behaviour in terms of process and motion planning as well as flexible manual control of arbitrary robot controllers. It is located between the industrial robot controller and the control units. For the purpose of a flexible manufacturer-independent access to the robot controller we define an object-oriented programming interface. The set of robot commands is manufacturer-independent and includes all basic robot functions regarding motion and program control. An inherent capability of the control layer is the transformation of neutral object-oriented robot commands to manufacturer-specific robot languages. With an emphasis on the development of a flexible control layer, we aim for a media-independent communication solution. In order to cover a broad range of robotic applications, different communication standards of industrial automation are implemented. Finally, two applications, a smartphone robot control and a distributed robot control system, are presented and discussed.
-----------------------------
EVALUATION OF TELE-ROBOTIC INTERFACE COMPONENTS FOR TEACHING ROBOT OPERATION
ABSTRACT
Remote-learning has been an increasingly growing field in the last two decades. The Internet development, as well as the increase in PC's capabilities and bandwidth capacity, has made remote-learning through the internet a convenient learning preference, leading to a variety of new interfaces and methods. In this work, we consider a remote-learning interface, developed in a Computer-Integrated-Manufacturing (CIM) Laboratory, and evaluate the contribution of different interface components to the overall performance and learning ability of end users. The evaluated components are the control method of the robotic arm and the use of a three-dimensional simulation tool before and during the execution of a robotic-task. An experiment is designed and executed, comparing alternative interface designs for remote-learning of robotic-operation. A Teleoperation task was given to 120 engineering students through five semesters. The number of steps required for completing the task, the number of errors during the execution and the improvement rate during the execution were measured and analyzed. The results provide guidelines for a better design of an interface for remote-learning of robotic-operation. The main contribution of this paper is in the introduction of a new teaching tool for laboratories and the supplied guidelines for an efficient design of such tools.
-----------------------------
The Flexible Bus Systems Using Zigbee as a Communication Medium
ABSTRACT
This paper describes a research on The Flexible Bus Systems (FBS) using Zigbee as a communication medium. The Flexible Bus System is a demand responsive transit (DRT) but it is more efficient and convenient in a sense that it entertains passenger's demands and gives bus locations in real time. The real time synchronization of The Flexible Bus System makes it information rich and unique as compared to other DRTs. The Flexible Bus Systems is a system that can replace the Traditional Bus Systems with its flexibility and efficiency. This paper discusses the use of wireless technologies in The Flexible Bus Systems and how to make it more reliable using short range wireless technology Zigbee.
-----------------------------
A New Intelligent Control Terminal of Solar Street Light
ABSTRACT
The new intelligent control terminal of solar street light was carried out in this paper. It combines of current general street light charge and discharge management controller and wireless communication technology. It employs fuzzy control theory to control the uncertain system to achieve reasonable battery charge or discharge. The terminal has the feature of running on the network and off the network independently, so it ensures the stability of the system.
-----------------------------
A ZigBee-based telecardiology system for remote healthcare service delivery
ABSTRACT
Patients with heart disease suffer much to have diagnostic ECG sessions especially in rural areas and areas with high population. This is mainly due to the remoteness of distance between patients and the medical units, as well as traffic congestion. Doctors also need a fast and reliable way to be able to check on their patients and provide a diagnosis irrespective of where they are. In this paper we describe the design and implementation of a telecardiology system using ZigBee. Our proposed system will provide doctors with the ability to monitor, and diagnose their patients remotely over the Internet. The system is capable of receiving a serial stream of data and extracting relevant packets from the measurements of the patient's vital signs. The implemented software allows patients to easily connect with their doctors and to send their data via Internet. The ECG signal is monitored in a real-time mode with the ability of keeping records through SCP-ECG (Standard Communication Protocol) standard.
-----------------------------
A parking guidance and information system based on wireless sensor network
ABSTRACT
This paper introduces a parking guidance and information system based on wireless sensor system. This system consists of parking space monitoring nodes, routing nodes, sink node, parking guidance display and an information and management center. The nodes transmit the information through wireless sensor network by tree-like topological structure with non-standard protocol we developed. After analyzing and processing the data, the information and management center would distribute the parking information by LED screen and displays for the drivers. And the results of the experiment show that the performance of the system can satisfy the requirements of parking guidance.
-----------------------------
Multifeatured visualization and navigation in tele-operation of mobile robots
ABSTRACT
Recently, the expectation to tele-operated mobile robots has been increasing much in order to perform the monitoring in various scenes. However, there are many critical problems in tele-operated system. Especially, we must improve the restriction of visual range, the usability of human interface, and intention sharing with the operator. In this paper, we discuss the monitoring system of a tele-operated robot and human interface based on visual information and distance information from the tele-operated mobile robots. Next, we propose a method of a navigation system based on multi-featured visualization. Finally, we propose a tele-operated system using iPhone, and show several experimental results of the proposed method.
All Projects related to:
B.E – Computer Science Engineering, B.TECH – Information Technology, B.E – Electronics & Communication Engineering, B.E – Electrical & Electronics Engineering, E, B.E - Electronics and Instrumentation Engineering, B.E - Instrumentation and Control Engineering, B.E - Biomedical Engineering, B.E - Mechanical Engineering, B.E - Telecommunication Engineering, B.E - Electronics & Telecommunication Engineering, B.E - Electronics and Control Engineering, B.E - Automobile Engineering, M.E - Electrical Engineering - Power Systems Engineering | High Voltage Engineering | Control and Instrumentation Engineering | Power Electronics and Drives | Electrical Drives and Embedded control | Embedded System Technologies, M.E - Electronics and Communication - Applied Electronics | Communication Systems | VLSI Design | Medical Electronics | Electronics and Control, M.E - Electronics - Communication & Networking, M.E - Computers - Computer Science and Engineering | Software Engineering | Multimedia Technology | Information Technology. PG Projects - MCA (Master of Computer Application), M.Sc - Computer Science, M.Sc - Electronics, M.S - Computers, M.S - Information Technology. UG Projects - BCA, B.Sc - Computer Science, B.Sc - Electronics
Embedded System Projects, Electronics Projects, Electrical Projects, Microcontroller Projects, Electronics and Communication Projects, Electrical and Electronics Projects, B.E - Electronics and Instrumentation Projects, Instrumentation and Control Projects, Biomedical Projects, Mechanical Projects, Telecommunication Projects, Electronics & Telecommunication Projects, Electronics and Control Projects, Automobile Projects, Embedded Systems Projects, Applied Electronics Projects, Communication Systems Projects, VLSI Design Projects, Medical Electronics Projects, Electronics Projects, Mechanical Projects, Biomedical Projects, Tele Communication Projects, Power Systems Engineering Projects, High Voltage Engineering Projects, Instrumentation Projects, Power Electronics Projects, Electrical Drives & Embedded control Projects, Motors, Drives & Control Projects, Computer Science Projects, Software Engineering Projects, Information Technology Projects, Communication and Networking Projects, Robotics Projects, Alternative Energy Source Projects,VLSI Projects, FPGA Projects, CPLD Projects, DSP Projects, MATLAB Projects, NS2 Projects, Power Source Projects, IEEE Embedded System Projects, IEEE Electronics Projects, IEEE VLSI Design Projects, IEEE Electronics and Communication Projects,IEEE Biomedical Projects, IEEE Power Electronics Projects, IEEE VLSI Projects, IEEE DSP Projects, IEEE Matlab Projects, IEEE Robotics Projects, 2011 IEEE Embedded System Projects, 2011 IEEE Electronics Projects, 2011 IEEE VLSI Design Projects, 2011 IEEE Electronics and Communication Projects,2011 IEEE Biomedical Projects, 2011 IEEE Power Electronics Projects, 2011 IEEE VLSI Projects, 2011 IEEE DSP Projects, 2011 IEEE Matlab Projects, 2011 IEEE Robotics Projects
Great weblog here! Additionally your site a lot up very fast! What web host are you the use of? Can I get your affiliate hyperlink for your host? I desire my website loaded up as fast as yours lol
ReplyDeleteMy website: golf distance finder