发明名称 |
OPTICAL FIBER ELECTRIC CURRENT SENSOR, ELECTRIC CURRENT MEASUREMENT METHOD, AND FAULT ZONE DETECTION APPARATUS |
摘要 |
An optical fiber electric current sensor includes a polarization-splitter (13) that splits light outputted from a sensor fiber (11) into two polarization planes of which polarization directions are perpendicular to each other, a depolarizer (17) that depolarizes each of the polarization components from the polarization-splitter (13), light receiving element that converts the two lights that were depolarized by the depolarizer (17) to a first signal (S1) and a second signal (S2) respectively, and a signal processing unit (15) that, based on the first signal (S1) and the second signal (S2), determines the magnitude of a Faraday rotation applied to the linearly-polarized light, and thereby calculates a value of the current to be measured.
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申请公布号 |
US2011115469(A1) |
申请公布日期 |
2011.05.19 |
申请号 |
US200913054213 |
申请日期 |
2009.07.15 |
申请人 |
THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED;TAKAOKA ELECTRIC MFG. CO., LTD. |
发明人 |
KONDO REISHI;KUROSAWA KIYOSHI;NASUKAWA SHINSUKE;KURAMOCHI TARO;YAMADA TOSHIHARU;ITAKURA EIJI |
分类号 |
G01R31/00 |
主分类号 |
G01R31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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