Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1980-04-14
1982-12-14
Tudor, Harold J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367155, 367166, 367167, 367162, 367171, H04R 1700
Patent
active
043641172
ABSTRACT:
A sonar transducer especially adapted for use when subjected to high hydrostatic pressures and extreme mechanical and explosive shock. The sonar transducer includes a conventional casing, ruggedized to withstand high pressures and a hostile environment. The casing is closed on all sides but one. An array of piezoelectric ceramic stacks are suspended inside of the casing and sandwiched between a single front mass and individual rear masses. The single front mass is positioned closest to the open side of the casing. A flexible cover is sealed over the open side of the casing and pressurized oil is placed inside the housing. Appropriate channels are provided to enable the oil to freely flow throughout the interior of the unit, including flowing inside of and about the ceramic stacks. Electrical connections are made with the ceramic stacks to allow external voltages to electrically stress the stacks, and also to allow external sensing of the voltages generated when the stacks are mechanically stressed. Appropriate lining material and filler material, as well as baffle plates, are selectively placed within the housing in order to impart a desired directivity pattern to the sound energy associated with the transducer's performance.
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Edo Western Corporation
Tudor Harold J.
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