Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1983-10-18
1986-01-07
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
250227, 350 9629, 350374, 356368, 374131, 374142, G01R 1507, G01K 100, G01K 1300
Patent
active
045636397
ABSTRACT:
Apparatus for measuring the temperature and/or electrical intensity based on the Faraday effect. It comprises a probe constituted by an optical fibre, wound in a generally solenoid form and two optical fibre strands connecting the probe to an inlet coupled to a polarized light source and to an outlet coupled to means for measuring the rotation angle of the light polarization plane, the optical fibre portion constituting the probe being twisted about its longitudinal axis in a random single direction. The two optical fibre strands connecting the probe respectively to the inlet and outlet of the system are twisted in opposite directions, the number of twisting turns to the right of one of the strands being equal to the number of twisting turns to the left of the other.
REFERENCES:
patent: 4151747 (1979-05-01), Gottleib et al.
patent: 4255018 (1981-03-01), Ulrich et al.
Rashleigh, S. and Ulrich, R., "Magneto-Optic Current Sensing with Birefringent Fibers", Applied Physics Letters, 34 (11), Jun. 1, 1979, pp. 768-770.
Baker Stephen M.
Commissariat a l''Energie Atomique
Levy Stewart J.
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