Distributed fiber-optic sensor with substance selective permeabl

Details Distributed fiber-optic sensor with substance selective permeabl Distributed fiber-optic sensor with substance selective permeabl

1990-07-13

1992-08-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022718, 385 12, H01J 516

Patent

active

051381532

ABSTRACT:
A sensor system comprises a fibe optic cable, or a fiber optic cable covered with a cladding, coated with a membrane that is sensitive to a particular substance to be detected. Contact with the material to be detected causes the membrane's index of refraction (normally less than that of the fiber core) to increase, decreasing the intensity of the light transmitted by the core. The fiber-optic sensor can be used to monitor one or more storage tanks for leakage by placing the fiber cable beneath the surface surrounding the tank(s).

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patent: 4894532 (1990-01-01), Peterson et al.

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