Fiber-optic vibration sensor

Details Fiber-optic vibration sensor Fiber-optic vibration sensor

1991-07-31

1993-05-04

Chapman, John E.

Measuring and testing

Vibration

Sensing apparatus

374142, 374188, G01H 900, G01K 552

Patent

active

052077667

ABSTRACT:
Vibrations of a body are measured by attaching a vibrating element to the body, directing a beam of electromagnetic energy onto the vibrating element and collecting reflected electromagnetic energy from the vibrating element. The magnitude of the reflected electromagnetic energy is processed to determine vibration and/or temperature of the body. The magnitude of the reflected light is preferably a function of second degree of the position of said vibrating element. Processing said magnitude of reflected electromagnetic energy is preferably done by a Fourier series up to a second harmonic.

REFERENCES:
patent: 3789674 (1974-02-01), Anderson et al.
patent: 3961185 (1976-06-01), Brokenshire et al.
patent: 4226120 (1980-10-01), Nissl
patent: 4493212 (1985-01-01), Nelson

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