Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1997-07-10
2000-10-24
Kwok, Helen C.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
7350402, 310329, G01P 904
Patent
active
061349623
ABSTRACT:
To suppress dispersion of detection sensitivity due to a change in ambient temperature in a vibration type angular velocity detecting apparatus. An angular velocity detecting apparatus comprising a vibrator, excitation means for exciting the vibrator, detecting means for detecting an amplitude of vibration based on Coriolis' force occurring with rotation of the vibrator excited to vibrate by the excitation means, and angular velocity calculating means for calculating an angular velocity of the rotation from a magnitude of the amplitude detected by the detecting means, wherein in an X, Y, and Z, three-dimensional, orthogonal coordinate space, the vibrator has a vibrator base extending in the X-direction on the XY plane, two first vibrating bars projecting in the direction of +Y from the vibrator base and at substantially symmetric positions with respect to a Y-directional axis passing a central portion of the vibrator base, two second vibrating bars projecting in the direction of -Y from the vibrator base and at the same X-directional positions as the two first vibrating bars, and a single supporting rod having prescribed torsional rigidity, projecting from the central portion of the vibrator base, and fixed at the tip thereof to a body to be detected.
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Kwok Helen C.
Toyota Jidosha & Kabushiki Kaisha
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