Optical fiber microbend horizontal accelerometer

Details Optical fiber microbend horizontal accelerometer Optical fiber microbend horizontal accelerometer

1987-07-06

1989-01-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, 73517R, H01J 516, H01J 4014

Patent

active

048002674

ABSTRACT:
A highly sensitive microbend horizontal fiber-optic accelerometer has been conceived, particularly useful in seismological research where minute accelerations must be detected. The device uses a cantilever beam and the compliance of an optical fiber mounted between deforming teeth to act as the springs in the accelerometer's spring-mass system. Acceleration is detected by sensing the changes in the intensity of light propagating through the deformed fiber due to the motion of the mass relative to the case. Accelerations as small as 5 .mu.g at 1 Hz can be detected with a dynamic range of 100 dB.

REFERENCES:
patent: 2738392 (1956-03-01), Talbott, Jr.
patent: 3297982 (1967-01-01), Beach
patent: 4226120 (1980-10-01), Nissl
patent: 4342907 (1982-08-01), Macedo et al.
patent: 4459477 (1984-07-01), Asawa et al.
patent: 4678903 (1987-07-01), Wlodarczyk et al.

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