Sensor head for a fiber-optic current measuring device

Details Sensor head for a fiber-optic current measuring device Sensor head for a fiber-optic current measuring device

1994-02-04

1996-03-19

Bovernick, Rodney B.

Optical waveguides

Optical waveguide sensor

25022717, 324 96, 324117R, 356351, G02B 600, G01R 3100, G01J 400

Patent

active

055009093

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.

REFERENCES:
patent: 4255018 (1981-03-01), Ulrich et al.
patent: 4697876 (1987-10-01), Dyott
patent: 4883337 (1989-11-01), Dahlgren
patent: 5051577 (1991-09-01), Lutz et al.
patent: 5063290 (1991-11-01), Kersey
patent: 5295207 (1994-03-01), Dupraz et al.
patent: 5371593 (1994-12-01), Cordova et al.
"Faseroptische Sensoren", Bohnert, et al., Bulletin SEV/VSE 82 (1991), pp. 17-29.

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