Title:
VIBRATION GYROSCOPE AND ZERO-POINT ADJUSTOR THEREFOR
Document Type and Number:
Japanese Patent JPH02212711
Kind Code:
A
Abstract:
PURPOSE:To enable detection of a leakage voltage even during the operation, by arranging a leakage voltage detection means in which outputs from a pair of piezo-electric elements for detection provided on vibrator are combined to cancel a Coriolis power output component. CONSTITUTION:When a drive current flows through a piezo-electric element 3 for driving, vibration pieces 2 of a vibrator 1 vibrate longitudinally in a direction (y) in a drive side vibration mode as indicated by the solid arrow. Here, when an angular velocity about a z axis is applied to a vibration gyroscope, the vibrator 1 vibrates in a detection side vibration mode as indicated by the arrow of the broken line by a Coriolis force generated longitudinally in a direction (x). This vibration is taken as parallel outputs from upper two piezo-electric elements 3 for detection to detect a Coriolis force output vc. On the other hand, in the parallel outputs from one pair of piezo-electric elements 3 for detection, one upper and the other lower, on the same side of the vibrator 1, an output component by the Coriolis force is canceled as displacements of the vibrator 2 are opposite in phase. Thus, a leakage voltage output vd alone can be obtained even when an angular velocity is added.
Inventors:
ONO OSAMU
FUJIMURA SEIICHI
SUGIHARA TAKESHI
FUJIMURA SEIICHI
SUGIHARA TAKESHI
Application Number:
JP3320389A
Publication Date:
August 23, 1990
Filing Date:
February 13, 1989
Export Citation:
Assignee:
NIPPON DENKI HOME ELECTRONICS
International Classes:
G01C19/56; G01C19/5614; (IPC1-7): G01C19/56
Domestic Patent References:
| JPS62217114A | 1987-09-24 | |||
| JPS61215916A | 1986-09-25 |
Attorney, Agent or Firm:
Yasuhiko Kagawa