Hydrophone structure with reverse bend of piezoelectric element
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United States of America Patent
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Sep 29, 1998
Issued Date -
N/A
app pub date -
Mar 3, 1997
filing date -
Dec 27, 1995
priority date (Note) -
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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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