发明授权
- 专利标题: Fiber-optic current sensor with polarimetric detection scheme
- 专利标题(中): 具有偏振检测方案的光纤电流传感器
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申请号: US12256289申请日: 2008-10-22
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公开(公告)号: US07692420B2公开(公告)日: 2010-04-06
- 发明人: Klaus Bohnert , Andreas Frank , Hubert Brandle
- 申请人: Klaus Bohnert , Andreas Frank , Hubert Brandle
- 申请人地址: CH
- 专利权人: ABB Research Ltd.
- 当前专利权人: ABB Research Ltd.
- 当前专利权人地址: CH
- 代理机构: St. Onge Steward Johnston & Reens LLC
- 主分类号: G01R31/00
- IPC分类号: G01R31/00
摘要:
The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A second part may e.g. be analyzed by a second circular analyzer, and a third part may be analyzed by a linear analyzer. By combining the signals obtained in this way, the current induced phase delay in the returning light can be measured efficiently and accurately.