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Feasibility implementation of voltage-current waveform telemetry system in power delivery system

IEEJ Transactions on Fundamentals and Materials 2011年第4期131卷 288-294+10页

作者： Furukawa, Tatsuya Akagi, Keita Fukumoto, Hisao Itoh, Hideaki Wakuya, Hiroshi Hirata, Kenji Ohchi, Masashi Graduate School of Science and Engineering Saga University 1 Honjo-machi Saga 840-8502 Japan Department of Electric Control System NITTETSU ELEX CO. LTD. 1320-4 Maeda Outsuka Yahata-Higashi-ku Kitakyushu 805-8555 Japan Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino 275-0016 Japan

The electric power is indispensable for modern life. However, there is a problem of harmonic disturbance when the harmonic power runs into electronic devices. To overcome the problem and realize a stable supply of the electric power is an important issue. In this study, we have developed a voltage-current waveform telemetry system for the remote measurement of the harmonics in the power delivery lines. The system consists of sensors, preamplifiers, a single board computer, and power collectors. Improvements are made on all of these components except the sensors. The power collector is a coil that can be placed around the same power line that we measure. We have designed the power collector by a finite element method(FEM) so that it can provide enough electricity for the computer to work properly. Thus, no other power source such as a battery except the secondary rechargeable battery for the recovery is necessary at the measurement place. The preamplifier in the new system is a single-supply differential amplifier circuit, and the single board computer has an inexpensive SH-3 CPU. Through experiments, we have confirmed that the power collector can provide sufficient electricity and that the new system can successfully measure the waveforms and the harmonics in power delivery systems. © 2011 The Institute of Electrical Engineers of Japan.

关键词： Embedded systems

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Highly-accurate light-penetration based silkworm pupa sex identification system

Highly-accurate light-penetration based silkworm pupa sex id...

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2011 International Quantum electronics Conference, IQEC 2011 and Conference on Lasers and Electro-Optics, CLEO Pacific Rim 2011

作者： Sumriddetchkajorn, Sarun Kamtongdee, Chakkrit Intelligent Devices and Systems Research Unit National Electronics and Computer Technology Center 112 Thailand Science Park Phahoyothin Rd Klong 1 Klong Luang Pathumthani 12120 Thailand Department of Electrical Engineering Faculty of Engineering Khon Kaen University Khon Kaen 40002 Thailand

This paper proposes and experimentally shows how we combine light penetration concept and simple image processing operations in order to identify gender of a silkworm pupa. Key features include low cost, fast, and hig... 详细信息

ISBN: (纸本)9780977565771

关键词： Animals

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Extraction of mobility degradation, effective channel length and total series resistance of NMOS at elevated temperature

Extraction of mobility degradation, effective channel length...

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International Conference on Electrical engineering/electronics, computer, Telecommunications and Information technology, ECTI-CON

作者： Kunagone Kiddee Anucha Ruangphanit Surasak Niemcharoen Narin Atiwongsangthong Rangson Muanghlua Department of Electronics Engineering Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand National Electronics and Computer Technology Center Klong Luang Pathum Thani Thailand

This article describes the extraction of total series resistance, effective channel length and low field effective channel mobility degradation parameter at temperature in the range of 25°C-125 °C of NMOS device .The relation of I DS and V GS in a linear region was used with a different of channel length. The procedure is based on the measurement of the transconductance characteristics of MOSFET in the linear region. The transconductance characteristics is determine for the several devices of difference drawn channel length. The results shows that, the effective channel length is increased in a range of 5×10 -10 m/°C. The low field mobility degradation parameter is decreased by the factor of 0.733. The total series resistance is increased in the range of 1.4 Ω-μm/°C. The errors between the predicted model and measured of I DS &V GS in linear region is approximately 3 %.

关键词： Electrical resistance measurement Resistance MOS devices

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Remote monitoring of the load characteristics of synchronous generators

Remote monitoring of the load characteristics of synchronous...

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3rd IEEE International Conference on Power engineering, Energy and Electrical Drives, PowerEng2011

作者： Colak, Ilhami Garip, Ilhan Sagiroglu, Seref Bayhan, Sertac Gazi University Technology Faculty Department of Electrical and Electronics Engineering Ankara Turkey Gazi Electrical Machines and Energy Control Group TRT Broadcasting Company Department of Strategy Development Ankara Turkey Gazi University Engineering Faculty Department of Computer Engineering Ankara Turkey Gazi Electrical Machines and Energy Control Group Gazi University Ataturk Higher Vocational School Ankara Turkey

ISBN: (纸本)9781424498444

In this study a data acquisition card has been designed and implemented to observe and analysis of the voltages and the currents of an alternator under resistive, capacitive and inductive loads. Detail analysis of power, power factor, phase angles and harmonics of the alternator has been done using software written in LabVIEW. The measurement system of voltage and current is opened to remote access. Users can access to the system from any computer having internet connection and make the instantaneous measurements. The experimental results show that the data obtained from power analyzer are very close to remote monitored one. Therefore the system developed can be a useful tool for engineering education purposes as an online course material, a simulator and an online control experiment. © 2011 IEEE.

关键词： Synchronous generators

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A development of knowledge representation for Thalassemia prevention and control program

A development of knowledge representation for Thalassemia pr...

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7th International Conference on Natural Language Processing and Knowledge engineering, NLP-KE 2011

作者： Assawamakin, Anunchai Chalortham, Nopphadol Ruangrajitpakorn, Taneth Limwongse, Chanin Supnithi, Thepchai Tongsima, Sissades Biostatistics and Informatics Laboratory Genome Institute National Center for Genetic Engineering and Biotechnology Pathumthani Thailand Department of Health-Related Informatics Faculty of Pharmacy Silpakorn University Nakornpathom Thailand Language and Semantic Technology Laboratory National Electronics and Computer Technology Center Pathumthani Thailand Department of Research and Development Faculty of Medicine Siriraj Hospital Mahidol University Bangkok Thailand

ISBN: (纸本)9781612847283

The spreading of thalassemia, the most common genetic disease in tropical areas, is increasing due to a migration thus the prevention and control program (PCP) of Thalassemia has been established. To better promote the yet unsuccessful PCP for thalassemia, ontology called PCPThalOnto is developed. The proposed ontology represents domain knowledge while a list of executable production rule is generated to represent operational knowledge. The PCPThalOnto consists of 1) class component to represent concepts of strategies, methodologies, techniques and activities of the PCP and 2) relation component to link between those classes or class and its instance. In the production rules, conditions for individual case determination are employed to execute a proper action. The well-constructed knowledge representation of PCP for thalassemia is developed as an electronic knowledge base for future applications to efficiently disseminate the underlying knowledge to people bridging the gap that deter the success of PCP. © 2011 IEEE.

关键词： Knowledge representation

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Real-time moving object detection for video surveillance system in FPGA

Real-time moving object detection for video surveillance sys...

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Conference on Design and Architectures for Signal and Image Processing

作者： Tomasz Kryjak Mateusz Komorkiewicz Marek Gorgon Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Automatics AGH University of Science and Technology Krakow Poland

FPGA devices are a perfect platform for implementing image processing algorithms. In the article, an advanced video system is presented, which is able to detect moving objects in video sequences. The detection method is using two algorithms. First of all, a multimodal background generation method allows reliable scene modelling in case of rapid changes in lighting conditions and small background movement. Finally a segmentation based on three parameters lightness, colour and texture is applied. This approach allows to remove shadows from the processed image. Authors proposed some improvements and modifications to existing algorithms in order to make them suitable for reconfigurable platforms. In the final system only one, low cost, FPGA device is able to receive data from high speed digital camera, perform a Bayer transform, RGB to CIE Lab colour space conversion, generate a moving object mask and present results to the operator in real-time.

关键词： Image color analysis Field programmable gate arrays Mathematical model Cameras Computational modeling Hardware Streaming media

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Traffic prediction models for Bangkok traffic data

Traffic prediction models for Bangkok traffic data

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International Conference on Electrical engineering/electronics, computer, Telecommunications and Information technology, ECTI-CON

作者： Nattapon Klakhaeng Jumpol Yaothanee Sukree Sinthupinyo Wasan Pattara-Atikom National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency Klong Luang Pathum Thani Thailand Department of Computer Engineering Faculty of Engineering Chulalongkom University Bangkok Thailand

This Paper presents a prediction model of traffic congestion condition on the roads in Bangkok. The results from our prediction model will be useful for systems related to traffic information. We constructed a model which can achieve 92.1% of accuracy on prediction of the congestion condition in next 30 minutes. Then, we found that the accuracy on the results that change from the current state is unsatisfiable. Hence, we constructed a new model that can improve the accuracy on this portion of traffic data. Moreover, we propose a new performance measurement which can distinguish the results in more detail. The final results show that our approach can improve the accuracy over the former model.

关键词： Computational modeling Accuracy computers

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The deflection length and emitter width on sensitivity of magnetotransistor

The deflection length and emitter width on sensitivity of ma...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Toempong Phetchakul Panyakorn Sottip Chana Leepattarapongpan Narichapan Penpondee Putapon Pengpad Arckom Srihapat Chandet Hruanun Amporn Poyai Department of Electronics Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Thai Microelectronics Center National Electronics and Computer Technology Center Chachoengsao Thailand

This paper presents a study of effect of deflection length and emitter width on sensitivity of magnetotransistor. The device has been fabrication on standard CMOS technology. It can detect magnetic field applied vertically to the chip. The structure consists of emitter (n-type), base (p-type) and collector (n-type) on silicon p-substrate. The device can sense magnetic field by Hall Effect theory and carrier deflection resulting to difference between base and collector current (ΔI CB ) related to magnetic field (B Z ) strength. From the experiment is comparing emitter width of 4, 5 and 10 micrometer at deflection length of 10 and 20 micrometer. The result shows that increase in injection emitter width cause to the sensitivity decreases and the deflection length of 20 micrometer is the best sensitivity. These results are very useful for developing the magnetotransistor for high sensitivity and performance.

关键词： Sensitivity Magnetic fields Magnetic devices Lorentz covariance Hall effect Magnetic circuits Magnetic tunneling

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The defects analysis in CMOS fabrication by arrhenius activation energy technique

The defects analysis in CMOS fabrication by arrhenius activa...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Weera Pengchan Toempong Phetchakul Amporn Poyai Department of Electronics Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Thai Microelectronics Center National Electronics and Computer Technology Center Chachoengsao Thailand

Low power consumption device can be realized by low junction leakage current. This leakage current relates to the defects in the depletion region of p-n junction. Among variety process steps, implantation step may generate defects. Therefore, the implantation-induced defects have been studied from the activation energy which has been obtained from the leakage current of p-n junction. The different geometry p-n junctions have been fabricated by a standard CMOS technology. The current-voltage (I-V) and high frequency capacitance-voltage (C-V) characteristics of p-n junctions with temperature dependence have been measured. The electrically active defects from implantation process can be extracted from the junction generation current density versus temperature. Base on this analysis, it will be demonstrated that the implantation-induced defects have been found in p + -n-well more than in n + -p-substrate. Finally, the possible nature of the defect will be discussed.

关键词： Capacitance Leakage current Current density P-n junctions Capacitance-voltage characteristics Substrates

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High-sensitivity humidity sensor utilizing PEDOT/PSS printed quartz crystal microbalance

High-sensitivity humidity sensor utilizing PEDOT/PSS printed...

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International Conference on Electrical engineering/electronics, computer, Telecommunications and Information technology, ECTI-CON

作者： Kata Jaruwongrungsee Chakrit Sriprachuabwong Assawapong Sappat Anurat Wisitsoraat Pattarapong Phasukkit Manas Sangworasil Adisorn Tuantranont Department of Electronics Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Thailand Nanoelectronics and MEMS Laboratory National Electronics and Computer Technology Center Pathum Thani Thailand

In this work, quartz crystal microbalance humidity sensor was fabricated by inkjet printing technique. Poly (3, 4 ethylenedioxythiophene)/poly-styrene-sulfonic acid (PEDOT7 PSS), one of the most widely used polymer composites, was printed on QCM electrode as sensing layer using Dimatrix material inkjet printer. The main advantage of this coating method is its high precision of solution coating with accurately controlled volume and area. The printed layer was varied from 1 to 20 layers. With 20 PEDOT/PSS printed layers, the humidity sensitivity is found increased by more than three orders of magnitude compared to uncoated QCM. In addition, the PEDOT/PSS coated QCM exhibits fast humidity detection with short response and recovery times. Thus, the PEDOT/PSS printed on the QCM electrode is an effective way to improve humidity-sensing characteristic of QCM.

关键词： Lead Copper Thickness measurement Multiplexing Humidity measurement computers Humidity

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