Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Patent
1997-10-14
1999-07-27
Lee, John D.
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
385 12, 174 24, 356 44, G02B 600, G01M 328
Patent
active
059304154
ABSTRACT:
A gas-insulated cable includes a plurality of sections separated by sealed partitions, each section including a cylindrical steel case, a cylindrical aluminum screen coaxial with and inside the case and three conductors. A monitoring device includes, between the case and the screen, optical fibers equal in number to the number of sections of the cable and extending from one end to the other of the cable, each of the sections being monitored by a single fiber. The monitoring device further includes at least one optical internal arc detector inserted in series into each fiber in the corresponding monitored section, at each end of the device, a device for detecting light conveyed by the optical fibers, and at least one optical threshold temperature detector inserted in series into each fiber in the corresponding monitored section.
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Patent Abstracts of Japan, vol. 11, No. 243 (P-603), Aug. 8, 1987 corresponding to JP 62 052424 A (Matsushita) dated Mar. 7, 1987.
Patent Abstracts of Japan, vol. 12, No. 95 (P-681), Mar. 29, 1988 corresponding to JP 62 229037 A (Matshushita Electric) dated Oct. 7, 1987.
GEC Alsthom T & D SA
Hao Victoria D
Lee John D.
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