Vibration sensing method and apparatus

Details Vibration sensing method and apparatus Vibration sensing method and apparatus

1987-07-07

1989-04-25

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73657, G01M 700

Patent

active

048236012

ABSTRACT:
A method and apparatus for nondestructive evaluation of a structure is disclosed. Resonant audio frequency vibrations are excited in the structure to be evaluated and the vibrations are measured and characterized to obtain information about the structure. The vibrations are measured and characterized by reflecting a laser beam from the vibrating structure and directing a substantial portion of the reflected beam back into the laser device used to produce the beam which device is capable of producing an electric signal containing information about the vibration.

REFERENCES:
patent: 3124099 (1964-03-01), Skilling
patent: 4452533 (1984-06-01), Miles et al.
patent: 4644556 (1987-02-01), Petuchowski et al.
Laser Displacement Sensor . . . M. Weksler et al., Applied Optics, Aug. 15, 1980 vol. 19 No. 16.

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