Patent ID: 6089089
Filing Date: 2000-07-18
Classification: G01C

Abstract:
A micro-gyro device for detecting rotational movenent about an input axis, comprising:a driving element which has back-and-forth vibrations along a straight-line drive axis, in order to generate Coriolis force in response to movement about the input axis, said force being exerted in a direction which is perpendicular to the drive axis, said driving element vibrating at or near its resonant frequency in the drive direction;a sensing element which receives Coriolis force from the driving element, said sensing element under Coriolis force vibrating at or near its resonant frequency in a sensing direction, which frequency is substantially similar to the resonant frequency of the driving element in the drive direction, in order to enhance transfer of Coriolis force from the driving element to the sensing element;said driving element having a resonant frequency in the sensing direction which is substantially different from the resonant freguency of the sensing element in the sensing direction; andlinking means connecting the driving element to the sensing element to transfer Coriolis force, said linking means permitting the mass of the driving element and the mass of the sensing element to be substantially separated from one another except for transfer of Coriolis force, so that vibrating motion of the driving element in the drive direction does not cause substantial motion of the sensing element in the drive direction; and vibrating motion of the sensing element in the sensing direction does not cause substantial motion of the driving element in the sensing direction.