Novel fiber-optic sensor for the simultaneous measurement of voltage and temperature

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作者：
Tsinghua Univ, Beijing, China [1 ]
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来源：
Zhongguo Jiguang | / 11卷 / 997-1002期
关键词：
Electric equipment - Electric power systems - Optical fiber coupling - Temperature measurement - Voltage measurement;
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摘要：
A novel fiber-optic sensor for the simultaneous measurement of voltage and temperature is presented. The possibility of the separation of the voltage and temperature from a sensing head is analyzed theoretically as follows: a quartz acts as a sensing element, the 1/4 wave plate is put behind the quartz, and the sensing head can simultaneously output two signals. One signal, involving the Pockels effect, is for voltage measurement; and the other, associated with the optical rotation effect, is for the temperature measurement. The experimental results show that the voltage accuracy of 0.5% can be obtained when the temperature varies by 90°C, and the accuracy of the temperature measurement is ±1°C.
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