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US 12,693,119 B2Granted
Vibration-type angular rate sensor
AssigneeSumitomo Precision Products Co., Ltd.
InventorTakafumi Moriguchi
Life of this patent
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Abstract
A vibration-type angular rate sensor (100) according to this invention is configured to switch between one set of electrodes (50) and another set of electrodes (50) as electrodes that induce the primary vibration in the vibrator (1), and to switch between the another set of electrodes and the one set of electrodes as electrodes that detect the secondary vibration in the vibrator (1), and the offset value after the switching and the offset value before the switching are symmetrical values with respect to a predetermined reference value.
Claims9
A vibration-type angular rate sensor comprising:
- a vibrator;
- a primary-side control circuit including a closed control loop and configured to induce a primary vibration in the vibrator by using an output of the closed control loop;
- and
- a secondary-side control circuit including a closed control loop that is configured to detect a secondary vibration generated in the vibrator due to an angular velocity applied to the vibrator, and configured to correct a sensor output by adding an offset value to the closed control loop, wherein
- the primary-side control circuit is configured to switch between one set of electrodes and another set of electrodes as electrodes that induce the primary vibration in the vibrator,
- the secondary-side control circuit is configured to switch between the another set of electrodes and the one set of electrodes as electrodes that detect the secondary vibration in the vibrator, and
- the offset value after the switching and the offset value before the switching are symmetrical values with respect to a predetermined reference value.
4 more elements
Dependencies are inferred from the claim text.