Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1997-03-03
1998-09-29
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367157, 310331, 310345, 310337, H04K 1700
Patent
active
058154663
ABSTRACT:
An active element in a hydrophone includes a piezoelectric hydrophone crystal mounted to a backing plate. The piezoelectric crystal may be divided into separate segments. If so segmented, the polarities of the segments are oriented in the same direction. Whether or not segmented, the center portion or segment of the crystal is in abutting contact with a motion limiter, which acts as a spring between the piezoelectric crystal and the casing surrounding the crystal and backing plate. The portions or segments or the crystal are connected to electrical signal leads with the minimum amount of solder necessary to ensure secure electrical and mechanical coupling, thereby reducing the effects of the solder connection on the stress flux profile in regions of the crystal close to the solder.
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Lobo Ian J.
Syntron Inc.
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