Coriolis gyro sensor

Details Coriolis gyro sensor Coriolis gyro sensor

1998-10-27

2000-01-04

Williams, Hezron

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

7350412, G01P 904, G01P 1502

Patent

active

060097515

ABSTRACT:
A single or dual input-axis Coriolis gyro sensor is comprised of a single planar inertia-member (10) connected to a coplanar counter-inertia (13) by a first set of elastic beams (12). The counter-inertia is in turn supported by a second set of coplanar elastic beams (15). The counter-inertia counteracts the reaction forces from the vibrating inertia-member and isolates the inertia-member from external vibrations. The inertia-member is angularly dithered about its center of gravity along an axis perpendicular to the plane. An input rate about a first or second orthogonal axis, locate in the plane of the sensor results in Coriolis moments, causing angular oscillations of the inertia-member. The angular oscillations are restrained by squeeze film damping and voltages applied to electrostatic damping electrodes. The electrode voltages are representative of the angular input rates.

REFERENCES:
patent: 3941001 (1976-03-01), LaSarge
patent: 4498340 (1985-02-01), Duncan
patent: 4699006 (1987-10-01), Boxenhorn
patent: 5203208 (1993-04-01), Bernstein
patent: 5488862 (1996-02-01), Neukermans et al.
patent: 5698783 (1997-12-01), Murakoshi et al.

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