Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1999-02-12
2000-10-03
Moller, Richard A.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
G01P 900
Patent
active
06125701&
ABSTRACT:
In a three-dimensional coordinate space of X, Y, and Z, there are provided a vibrator having a vibrator base extending in the X-direction on the XY plane, a first vibrating bar projecting in the positive Y direction from the vibrator base and having a first natural frequency in the X-directions, and a second vibrating bar projecting in the negative Y direction from the vibrator base and having a second natural frequency in the X-directions, different from the first natural frequency; excitation means for exciting either the first or second vibrating bar in the Z-directions or in the X-directions; detection means for detecting the amplitude of vibration orthogonal to the Y-directions and to the directions of excitation of vibration caused in the first or second vibrating bar by the excitation means; and angular velocity calculating means for calculating an angular velocity of rotation about an axis in the Y-direction from the magnitude of the amplitude detected by the detection means, and the geometric dimensions of the first and second vibrating bars are determined so as to prevent the vibrator base from vibrating in the Z-directions when the first or second vibrating bar is excited by the excitation means. As so constructed, the angular velocity can be detected with high accuracy.
REFERENCES:
patent: 4898032 (1990-02-01), Voles
patent: 4930351 (1990-06-01), Macy et al.
patent: 5056366 (1991-10-01), Fersht et al.
patent: 5166571 (1992-11-01), Konno et al.
patent: 5585562 (1996-12-01), Kurata et al.
Nonomura Yutaka
Sugitani Nobuyoshi
Moller Richard A.
Toyota Jidosha & Kabushiki Kaisha
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