| 摘要 |
<p>An apparatus or instrument for use in place of a mechanical gyroscope indicates angular velocity about the z axis by measuring the Coriolis acceleration along the y axis at the tip of a vibrating leaf spring (10) directed along the z axis and vibrating in the direction of the x axis. The vibrations are maintained electromagnetically, the vibrations being sensed by a strain gauge bridge (34) secured to the leaf spring (10). A micromechanical acceleration sensor (38) is secured to the tip (32) of the leaf spring (10) and is oriented in the y direction to measure the Coriolis acceleration (ac). To avoid the need for extreme accuracy of orientation, the effects of the translatory acceleration components (at) in the x direction and the pendulum-like acceleration component (az) along the z axis are suppressed electronically by means of a phase sensitive rectifier (50) to which the output of the strain gauge bridge (34) is fed via a sign comparator (52).</p> |
