Piezoelectric hydrophone

Details Piezoelectric hydrophone Piezoelectric hydrophone

1987-09-25

1989-06-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310331, 310332, 367157, H01L 4108

Patent

active

048411922

ABSTRACT:
A piezoelectric hydrophone is designed with overload protectors (1a, 11a, 11b) which protects the hydrophone against internal and external overpressures. The hydrophone assembly proper and a first overload protector (1a) are made in one piece, while other overload protectors (11a, 11b) are mounted outside the hydrophone assembly (1) above the pressure sensitive diaphragms (4a, 4b).
The separate metallic parts of the hydrophone are joined by means of laser welding which may be performed in a pressure chamber. Likewise the final sealing of the hydrophone assembly may take place in a pressure chamber under a pressure corresponding to the water depth at which the hydrophone is operated.

REFERENCES:
patent: 3202962 (1965-08-01), Elston
patent: 3255431 (1966-06-01), Howatt
patent: 3832762 (1974-09-01), Johnston et al.
patent: 3970878 (1976-07-01), Berglund
patent: 4163206 (1979-07-01), Hall, Jr.
patent: 4336639 (1982-06-01), Bergland
patent: 4536862 (1985-08-01), Sullivan et al.
patent: 4679178 (1987-07-01), Larson et al.

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