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US 8,816,570 B1Granted
Dual cantilever beam relaxor-based piezoelectric single crystal accelerometer
AssigneeApplied Physical Sciences Corp.
InventorJames A. McConnell
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AssigneeApplied Physical Sciences Corp.
InventorJames A. McConnell
Estimating the term…
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.
A flexural sensing structure that employs at least two trilaminar piezoelectric cantilever beams having their longitudinal axes disposed in a substantially parallel arrangement with each beam comprising a relaxor-based single crystal transduction element on each side of a metal beam structure, said relaxor-based single crystal transduction elements having their polarization axis substantially perpendicular to the longitudinal axis of the beam, wherein said at least two trilaminar piezoelectric cantilever beams are covered by a viscoelastic material.
Dependencies are inferred from the claim text.