Miniature vector sensor
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United States of America Patent
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Jun 5, 2018
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N/A
app pub date -
Oct 28, 2015
filing date -
Oct 28, 2015
priority date (Note) -
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Abstract
A vector sensor for use in acoustic instruments is described. The vector sensor includes: a cylindrical bulkhead partition defining a plurality of channels extending longitudinally on a circumferential wall of the bulkhead partition between a first surface and a second surface of the bulkhead partition; first and second cylindrical piezoelectric transducing pieces affixed to the bulkhead partition and extending outwardly as cantilever beams and contained within respective pressure housing capsules. The sensor may include cylindrical foam end pieces fitted over the capsules and having corresponding channels in their outer surfaces that correspond to channels in the bulkhead partition, so as to allow wiring and strength members to pass through. The cylindrical piezoelectric transducing pieces may be formed from a piezoelectric cylindrical tube with a first electrode covering its inner surface and a second electrode on its outer surface. The second electrode may be formed from a plurality of electrically disconnected electrodes spaced around the tube and located towards a fixed end of the tube, leaving a portion of the outer surface near the free end of the tube uncovered.
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