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A Fast Magneto-optic Current Sensor Utilizing Bulk Yttrium Iron Garnet Crystals

Author: WangMaoZhong
Tutor: HeJianJun
School: Zhejiang University
Course: Optical Engineering
Keywords: Faraday effect Yttrium iron garnet Hysteresis Current sensor Transient response
CLC: TP212
Type: Master's thesis
Year: 2008
Downloads: 102
Quote: 0
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The sensing element of a block of pure yttrium iron garnet crystals as optical fiber current sensor design and the performance of the various aspects of the theoretical research and experimental testing . Since pure yttrium-iron garnet crystal having a strong Faraday effect and a fast response characteristics , while at the same time this sensor also has a compact and sturdy structure and inherent electrical insulating properties , the the weak transient current of the sensor in the high voltage power system measurement , there will be a good prospect of application . Firstly, the starting point of the design project concise overview of current measurements on a variety of cutting-edge technology and the pros and cons comparison . Compared the performance of different materials, magneto-optical crystal , the thesis of this basic principle of the sensor described the need to pay attention on the design and assembly of a summary . Secondly, experimental study of the sensitivity of the sensor , hysteresis , temperature dependence , the research results show that the sensor has good linearity and fast response . In addition, the design of a sensor system consisting of four sensor heads to the sensor of the current-carrying conductor position dependent study . The results show that , in good agreement with the experimental measurements and theoretical calculations made ??. Finally, the design of a weak transient current measurement system specially optimized and the performance of this system was investigated experimentally . Studies show that this system is capable of measuring weak to transient current of 20 mA .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
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