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ICO International Conference on Information Photonics

作者： El-Khozondar, Hala J. Muller, Mathias S. El-Khozondar, Rifa J. Koch, Alexander W. Electrical Engineering Department Islamic University of Gaza P.O. Box 108 Gaza Palestinian Territory Israel Institute for Measurement Systems and Sensor Technology Technical University Munich Germany Physics Department Al-Aqsa University Gaza Palestinian Territory Israel

ISBN: (纸本)9781612843155

The growth in the capacity of electric power system creates a necessity demand on protection relaying systems. Optical current transducers (OCT) which are mainly single mode optical fiber subjected to Faraday rotation are used as replacement for EM transducers for their immunity to the EM interference. However, the sensitivity to currents depends on the Verdet constant which is low in optical fiber but the optical path length can be increased to compensate for it by winding the fiber around a current carrying element a large number of turns. In this work, we would like to study the effect of the inhomogeneity of the magnetic field induced by the current in the sensitivity of the optical fiber sensor. © 2011 IEEE.

关键词： Optical fibers

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Active Probe Control of a Metrological Atomic Force Microscopy

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IFAC Proceedings Volumes 2011年第1期44卷 3533-3538页

作者： J.C. Shen N. Dorozhovets T. Hausotte E. Manske W.Y. Jywe C.H. Liu Department of Automation Engineering National Formosa University Huwei Yunlin 632 Taiwan Faculty of Mechanical Engineering Institute of Process Measurement and Sensor Technology Ilmenau University of Technology Ilmenau Thuringia Germany Institute of Electro-Optical and Materials Science National Formosa University Huwei Yunlin 632 Taiwan

Abstract This article considers the force control of an active probe for Atomic Force Microscopy (AFM). Firstly, the structure of this active probe is described. For designing the force controller, the model of this active probe was identified. Based on the measured frequency response, two notch filters were used to remove the resonant peak in open-loop frequency response. Then, a PI controller was designed to regulate the force of the probe. This controller was then implemented in a Digital Signal Processor (DSP). Experimental results were given to compare the actual performance of this controller with the conventional PI controller. It is shown that the controller with notch filters reduces the control error considerably and enables faster scan speed at weaker tip-sample interaction forces.

关键词： Atomic force microscope Force control PI controller Notch filters

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Magnetic field inhomogeneity induced on the magneto-optical current sensors

Magnetic field inhomogeneity induced on the magneto-optical ...

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ICO International Conference on Information Photonics (IP)

作者： Hala J. El-Khozondar Mathias S. Müller Rifa J. El-Khozondar Alexander W. Koch Electrical Engineering Department Palestinian Territory Islamic University of Gaza Gaza UAE Institute for Measurement Systems and Sensor Technology Technical University Munich Germany Physics Department Palestinian Territory Al-Aqsa University Gaza UAE

关键词： Optical polarization Optical fiber sensors Solenoids Optical fibers

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Frequency-modulated phase generated carrier demodulation for eliminating companion amplitude modulation

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2011年第2期22卷 180-184页

作者： Shi, Qing-Ping Wang, Li-Wei Zhang, Min Tian, Qian Liao, Yan-Biao State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 China Optical Fiber Sensor Laboratory Department of Electronic Engineering Tsinghua University Beijing 100084 China

In order to eliminate the effect of amplitude modulation in the source with direct frequency modulation (DFM) on phase generated carrier (PGC) demodulation approach, a new PGC method was proposed based on differential-cross multiply(DCM) and double interferometric signals by a 3 × 2 directional coupler. Experimental results confirm that the new scheme has eliminated the effect of the companion amplitude modulation on demodulation very well. For a demodulation signal of 4 rad, the total signal-harmonic-ratio (SHR) increases by more than 20 dB, and the amplitude deviation of this new method is 0.08 rad, while it is up to 0.33 rad by the DCM-PGC approach for a single interferometric signal. Besides, the signal-to-noise ratio (SNR) and signal-to-noise-and-distortion (SINAD) are also improved significantly.

关键词： Demodulation

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Chlorine gas sensors using hybrid organic semiconductors of PANI/ZnPcCl_(16)

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Journal of Semiconductors 2010年第8期31卷 88-92页

作者：雷廷平施云波吕文龙刘洋陶巍袁鹏亮林立伟孙道恒王立权 College of Physics and Mechanical & Electrical Engineering Xiamen University Mechanical Engineering Center for Post-doctoral Studies Harbin Engineering University Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province School of Measurement Control Tech & Communications EngineeringHarbin University of Science and Technology Qingyang Secondary Specialized School of Science and Technology Department of Mechanical Engineering and Berkeley Sensor and Actuator Center University of CaliforniaBerkeleyCalifornia 94720USA

PANI/ZnPcCl_（16）（polyaniline doped with sulfosalicylic acid/hexadecachloro zinc phthalocyanine） powders were vacuum co-deposited onto Si substrates,where Pt interdigitated electrodes were made by *** PANI/ZnPcCl_（16） films were characterized and analyzed by SEM,and the influencing factors on its intrinsic performance were analyzed and sensitivities of the sensors were investigated by exposure to chlorine（Cl_2） *** results showed that powders prepared with a stoichiometric ratio of（ZnPcCl_（16））_（0.6）（PANI）_（0.4） had a preferential sensitivity to Cl_2 gas, superior to those prepared otherwise;the optimal vacuum co-deposition conditions for the films are a substrate temperature of 160℃,an evaporation temperature of 425℃and a film thickness of 75 nm;elevating the operation temperature （above 100℃） or increasing the gas concentration（over 100 ppm） would improve the response characteristics,but there should be upper levels for ***,the gas sensing mechanism of PANI/ZnPcCl_（16） films was also discussed.

关键词： PANI/ZnPcCl_（16） hybrid organic semiconductors chlorine gas sensors vacuum co-deposition

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SoC Li-ion battery monitoring with impedance spectroscopy

SoC Li-ion battery monitoring with impedance spectroscopy

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： A. Cuadras O. Kanoun Castelldefels School of Technology (EPSC) Electronics Engineering Department Universitat Politecnica de Catalunya Castelldefels Spain Chair for Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany

The state of charge (SoC) of Li-ion coin batteries is investigated as a function of impedance variation. Batteries are submitted to highly stressed conditions to simulate the operation of active loads and impedance is measured in real time both for charge and discharge. In particular, modulus and phase dependence as a function of SoC is studied with impedance spectroscopy in the range 40 Hz to 20 kHz. Phase is found to be the most sensitive parameter. It decreases with battery discharge and increases with battery charge. Impedance is simply modelled with a 3 parameters circuit, two resistors and a constant phase element (CPE). Selected frequencies are then proposed to estimate the SoC of the battery.

关键词： Monitoring Electrochemical impedance spectroscopy Frequency estimation Current measurement Charge measurement Battery charge measurement Impedance measurement Stress measurement Circuits Resistors

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The Application of the Dual-Beam Laser Interferometer for Calibration Precision Machine Tools

The Application of the Dual-Beam Laser Interferometer for Ca...

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作者： Liu, Chien-Hung Jywe, Wen-Yuh Chen, I.-Ching Duan, Li-Lii Jwo, Hsin-Hung Jeng, Yeau-Ren Hsu, Tung-Hui Teng, Yun-Feng Huang, Hsueh-Liang Wang, Ming-Shi Jäger, Gerd Institute of Electro-Optical and Materials Science National Formosa University Taiwan Department of Automation Engineering National Formosa University 632 Taiwan Ilmenau University of Technology Faculty of Mechanical Engineering Institute of Process Measurement and Sensor Technology PF 100 565 98684 Ilmenau Germany Department of Mechanical Engineering National Chung Cheng University Taiwan Institute of Mechanical Engineering National Chung Cheng University Taiwan Graduate Institute of Electro-Opticaland Materials Science National Formosa University Taiwan Development of Engineering Science National Cheng Kung University Taiwan Department of Automation Engineering National Formosa University Taiwan Department of Automation Engineering National Formosa University Taiwan

In this paper, a dual-beam laser interferometer measurement system for precision machine tools was presented. The straightness measurement module and the angular measurement module were combined to form this measurement system such that the operations of precision machine tools, the positioning, vertical straightness, horizontal straight- ness, pitch and yaw, can be obtained. The resolution of the positioning, straightness and angle has achieved 0.1 nm, 1 nm and 0.1 arcsec, respectively. The performance of this measurement system has been proved by experiments. ©Oldenbourg Wissenschaftsverlag.

关键词： Angle measurement

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A Heuristic Routing Protocol for Wireless sensor Networks in Home Automation

A Heuristic Routing Protocol for Wireless Sensor Networks in...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Xiao Hui Li Seung Ho Hong Kang Ling Fang Engineering Research Center of Metallurgical Automation and Measurement Technology Ministry of Education Wuhan University of Science and Technology Wuhan Hubei China Department of Electronics Information and System Engineering Ubiquitous Sensor Network Research Center Hanyang University Ansan South Korea

Although numerous routing protocols have been designed for wireless sensor networks, not all are suitable for wireless sensor networks in home automation (WSNHA). In this paper, we evaluate some popular wireless sensor network routing protocols for their suitability to WSNHA. We also propose a greedy-algorithm heuristic routing (GAHR) protocol and an A* algorithm for route finding. We compared the performance of this heuristic routing with the ad-hoc on-demand distance-vector protocol using a simulation. The simulation results showed that this routing protocol dramatically reduced the routing overhead and the average packet delay without impacting reliability, and demonstrated that WSNHA-GAHR adapts automatically to changes in the network topology.

关键词： Routing protocols Wireless sensor networks Home automation Network topology Costs User interfaces Educational technology Intelligent sensors Actuators Design engineering

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Measuring the fat content of liver tissue - Experimental setup -

Measuring the fat content of liver tissue - Experimental set...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： C. Sehestedt M. Heidary Dastjerdi O. Dirsch U. Dahmen J. Himmel Department of Measurement Engineering and Sensor Technology University of Applied Sciences Koblenz Remagen Germany Institute of Pathology University Hospital Cologne Cologne Germany Department of Transplantation Surgery Huflandstraβe 55 Essen University Essen Germany

Fat content of liver is an essential parameter to decide whether a liver is suitable for transplantation or not. The determination of fat content is often challenging and usually there is not enough time to bring a specimen to a pathologic laboratory. That is why transplantation clinics need a technique to measure the fat content of a graft. In this paper the theoretical basics and an existing laboratory setup are presented.

关键词： Liver Permittivity Frequency measurement Coils Temperature measurement Capacitance Laboratories

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Multifunction spectrometer for optical inspection of red wine

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Sensing and Instrumentation for Food Quality and Safety 2008年第1期2卷 58-65页

作者： Niskanen, Ilpo Mutanen, Jarkko Lehtonen, Pekka Räty, Jukka Yamaguchi, Masahiro Peiponen, Kai-Erik Jaaskelainen, Timo Measurement and Sensor Laboratory Research and Development Centre of Kajaani University of Oulu Technology Park 127 Kajaani 87400 Finland Imaging Science and Engineering Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226 Japan Alko Incorporated Alcohol Control Laboratory P.O. Box 279 Vantaa 01301 Finland Department of Physics and Mathematics University of Joensuu P.O. Box 111 Joensuu 80101 Finland

The main goal of this study was to develop an apparatus that makes it possible to measure both, color, refractive index and light scattering (turbidity) of red wines using a single device only. Typically such measurement of red wine quality requires three different measurement devices. As an example of the efficiency of the present device we studied the change of the thermo-optical and time-dependent optical properties of red wine samples. Here we report on change of optical properties of two Merlot wine samples, which were obtained by opening authentic red wine bottles and preserving a set of samples both at room and refrigerator temperature for 26 days, respectively. The interesting feature with both red wine samples was that the light scattering, i.e. the turbidity of the samples, increased as a function of time due to oxidation process. It is suggested that the multifunction spectrophotometer can be applied for optical inspection of red and other wine products. © Springer Science+Business Media, LLC 2008.

关键词： Wine

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