Piezoelectric polymer membrane stress gage

Details Piezoelectric polymer membrane stress gage Piezoelectric polymer membrane stress gage

1978-02-23

1979-08-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310800, 340 10, 340 8PC, H01L 4110

Patent

active

041662296

ABSTRACT:
Apparatus and method for detecting pressure variations because of acoustic aves by modulating a preset tensile stress in a stretched thin sheet of a piezoelectric polymer. The modulation is provided by the changing stress caused by an impinging acoustic signal or the like. The piezoelectric polymer sheet under a preset tension acts effectively as a membrane resulting in a high output combined with a high resonance frequency and a wide operating frequency range.

REFERENCES:
patent: 3249913 (1966-05-01), Smyth et al.
patent: 3353150 (1967-11-01), Jacox
patent: 3375489 (1968-03-01), Kompanek
patent: 3798474 (1974-03-01), Cassand et al.
patent: 3947644 (1976-03-01), Uchikawa

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