Structure of angular rate sensor for minimizing output noise

Details Structure of angular rate sensor for minimizing output noise Structure of angular rate sensor for minimizing output noise

1999-01-21

2000-11-28

Moller, Richard A.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

G01P 900

Patent

active

061519650

ABSTRACT:
An angular rate sensor is provided which measures the angular rate of motion applied to a moving object and which features the structure minimizing electrical noise of an output. The angular rate sensor includes generally a first tuning fork, a second tuning fork, and a torsion beam. The first tuning fork includes two tines and serves as a drive oscillator and a measuring oscillator. The second tuning fork includes two tines which extend in the same direction as the first and second tines partially surrounding the first tuning fork and which connect at ends thereof with ends of the tines of the first tuning fork through a stem extending substantially perpendicular to the tines of the first and second tuning forks. The torsion beam extends substantially along the center line of the sensor and supports the stem on a base. The width of the torsion beam is smaller than an overall width of the first tuning fork, thereby minimizing leakage of energy of self-excited oscillation from the drive oscillator to the measuring oscillator and achieving effective transmission of vibratory energy to the measuring oscillator which is produced by the Coriolis force resulting from application of angular motion to the sensor.

REFERENCES:
patent: 4654663 (1987-03-01), Alsenz et al.
patent: 4899587 (1990-02-01), Staudte
patent: 5824900 (1998-10-01), Konno et al.

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