Sensor head for a fiber-optic current measuring device
US5500909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Feb 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2551
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The sensor head (1) is intended for a fiberoptic current measuring device. It exhibits a twisted low-birefringence LB fiber (14) which is guided around a current conductor (2) and serves to conduct polarized light. Using the LB fiber (14), the Faraday rotation of the polarized light, which rotation is generated by the magnetic field (H) of the current (J) to be measured, is detected. The LB fiber (14) is spliced at its two ends in each instance with one of two polarization-conserving, light-conducting HB fibers (6, 7), one (6) of which supplies the polarized light. The two HB fibers (6, 7) are secured in each instance in the vicinity of the two splice locations (19, 20) with the absorption of the torsional force generated by the twisting of the LB fiber (14). In spite of having a simple and sturdy structure, the sensor head (1) is distinguished by a high degree of measurement accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.