Fiberoptic current sensor having a plurality of sensor heads
US7046867B2 · kind B2 · utility
6Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Feb 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/247
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a fiberoptic current or magnetic field sensor having a plurality of sensor heads, and to a corresponding measurement method. The sensor has a light source: N≧2 sensor heads; at least one phase modulation unit; a detector; a control and evaluation unit. The at least one phase modulation unit is connected to at least one of the sensor heads. Lightwaves can be differentially phase-modulated in a non-reciprocal fashion by means of the at least one phase modulation unit. Modulation amplitudes φ0,n and modulation frequencies vn are selected as a function of modulation-relevant optical path lengths ln.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.