| 摘要 |
An angular speed measuring device comprises a rotating tuning fork transducer. First excitation electrodes excite the transducer to cause a first vibration in a first plane parallel to the planes of the principal faces of the transducer. The first vibration induces a second vibration in a plane perpendicular to the planes of the principal faces. The second vibration comprises a first component having an amplitude representative of the angular speed, and a second or parasite component. To avoid the distorting effects of the parasitic component of the second vibrations, the device is provided with a second set of excitation electrodes to excite a third vibration in the transducer, the third vibration being in phase opposition to the parasite component of the second vibration. Detection electrodes are provided for detecting vibrations in the direction perpendicular to the principal faces. The output signal produced by the detection electrodes is utilized control the second set of excitation electrodes to slave the amplitude of the third vibration to the amplitude of the parasite component of the second vibration.
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