Disc resonator integral inertial measurement unit

Details Disc resonator integral inertial measurement unit Disc resonator integral inertial measurement unit

G - Physics

01

D

G01D 5/12 (2006.01) G01C 21/16 (2006.01) G01P 3/48 (2006.01) G01P 15/08 (2006.01) G01P 15/18 (2006.01)

Patent

CA 2636682

Sensing motion of multiple degrees of freedom for an integral inertial measurement unit provided through the operation of a single centrally mounted planar disc resonator having a single driven mode in a single vacuum enclosure is disclosed. The resonator comprises a circumferentially slotted disc having multiple internal capacitive electrodes within the slots in order to excite a single in-plane driven vibration and sense in-plane vibration modes or motion of the resonator. In addition, vertical electrodes disposed below and/or above the resonator may also be used to sense out-of-plane vibration or motion. Acceleration sensing in three orthogonal axes can be obtained by sensing two lateral modes of the disc resonator in the plane of the disc from the internal electrodes and a vertical mode from the vertical electrodes.

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