Water penetration-detecting apparatus and optical fiber cable us

Details Water penetration-detecting apparatus and optical fiber cable us Water penetration-detecting apparatus and optical fiber cable us

1987-05-06

1989-03-14

Lee, John D.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9623, 250227, G01N 2188, G02B 644

Patent

active

048120146

ABSTRACT:
A water penetration-detecting apparatus includes an optical fiber sensor having an optical fiber, and a water-absorbent material disposed along the optical fiber in contiguous relation to the fiber. The water-absorbent material, when absorbing water, expands volumetrically so as to apply a pressure to an outer peripheral surface of the optical fiber to bend the fiber. A detecting means is connected to the optical fiber sensor for detecting a bending of the optical fiber.

REFERENCES:
patent: 4159420 (1979-06-01), Tsunoda
patent: 4221962 (1980-09-01), Black et al.
patent: 4270049 (1981-05-01), Tanaka et al.
patent: 4456331 (1984-06-01), Whitehead et al.
patent: 4654520 (1987-03-01), Griffiths

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