Pressure and temperature compensated photoelastic hydrophone

Details Pressure and temperature compensated photoelastic hydrophone Pressure and temperature compensated photoelastic hydrophone

1983-03-21

1985-05-28

Westin, Edward P.

Measuring and testing

Vibration

Sensing apparatus

250231R, 350 9629, 367140, 367149, H04R 2300, G01L 124

Patent

active

045192529

ABSTRACT:
An acoustic sensor with ambient pressure and temperature compensation having a photoelastic element positioned between a diaphragm and a support beam. Thin layers of oil between the photoelastic material and both the diaphragm and support beam prevent surface stress of the photoelastic element due to slowly varying pressures while surface stresses are caused thereon by relatively rapid pressure variations.

REFERENCES:
patent: 4368645 (1983-01-01), Glenn et al.
patent: 4422167 (1983-12-01), Shajenko
patent: 4449210 (1984-05-01), Myer
patent: 4466295 (1984-08-01), Wesson
patent: 4471474 (1984-09-01), Fields

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