Measuring and testing – Vibration – Sensing apparatus
Patent
1983-08-08
1985-08-13
Levy, Stewart J.
Measuring and testing
Vibration
Sensing apparatus
73657, 250227, 356345, G01H 100, G01V 116
Patent
active
045342229
ABSTRACT:
A vibration sensor is constructed by providing two preferably matched coils of fiber-optic material. When the sensor experiences vibration, a differential pressure is exerted on the two fiber coils. The differential pressure results in a variation in the relative optical path lengths between the two fibers so that light beams transmitted through the two fibers are differently delayed, the phase difference therebetween being a detectable indication of the vibration applied to the sensor.
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patent: 4162397 (1979-07-01), Bucaro et al.
patent: 4193130 (1980-03-01), Young et al.
patent: 4297887 (1981-11-01), Bucaro
patent: 4363114 (1982-12-01), Bucaro et al.
patent: 4408495 (1983-10-01), Couch et al.
patent: 4442350 (1984-04-01), Rashleigh
Kersey, A. D. et al., "High-Sensitivity Fibre-Optic Accelerometer", Electronics Letters, vol. 18, No. 13, Jun. 1982, pp. 559-561.
Finch George W.
Udd Eric
Chapman, Jr. John E.
Finch George W.
Levy Stewart J.
McDonnell Douglas Corporation
Royer Donald L.
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