Dual cantilever beam relaxor-based piezoelectric single crystal accelerometer
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United States of America Patent
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Aug 26, 2014
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Jun 27, 2011
filing date -
Aug 31, 2010
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Abstract
A dual cantilever beam relaxor-based piezoelectric single crystal accelerometer is provided. A flexural sensing structure is provided that employs at least two piezoelectric cantilever beams having their longitudinal axes disposed in a substantially parallel arrangement with each beam containing at least one relaxor-based single crystal transduction element having its polarization axis substantially perpendicular to the longitudinal axis of the beam. One end is mounted to a rigid base and the other end can be mounted to a seismic proof-mass or can be free, wherein the base is subjected to dynamic excitation from either mechanical or acoustical origin. The flexible sensing structure can optionally be encapsulated in a viscoelastic material having a mechanical compliance and loss that is substantially greater than that of the flexible sensing structure.
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