Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1993-08-04
1995-02-28
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367174, 367 20, 367155, 310337, 29594, H04R 1700
Patent
active
053943791
ABSTRACT:
A hydrophone for a marine seismic streamer has a pressure sensor with outer membrane surfaces on which piezoelectric sensors (4, 5) are secured. The pressure sensor is formed from two spaced steel disks (1, 2) having recesses directed toward one another and which are laser-welded at the edges in a gas-tight manner. The pressure sensor is electrically insulated from its external environment by a synthetic resin coating, which may enclose the entire pressure sensor, including the connecting wires. A method of making the hydrophone is also disclosed. The hydrophone can be manufactured so as to be small in dimensions and weight, is mechanically sturdy and capable of withstanding overload, as well as being protected by the synthetic resin coating against short circuiting and corrosion.
REFERENCES:
patent: 3832762 (1974-09-01), Johnston et al.
patent: 3970878 (1976-07-01), Berglund
patent: 4639283 (1987-01-01), Nakamura
patent: 4841192 (1989-06-01), Tetlie et al.
patent: 5003285 (1991-03-01), Geil
Technau Manfred
Weichart Helmut
Eldred J. Woodrow
Farley Walter C.
Prakla-Seismos GmbH
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