Patent ID: 7723905
Filing Date: 2010-05-25
Classification: G01C

Abstract:
1. A vibrating gyrosensor comprising: a support substrate with a wiring pattern having a plurality of lands; a vibrating element mounted on a surface of the support substrate; and an AC driving circuit operatively coupled to the vibrating element, wherein, the vibrating element includes a base part having a mounting surface with a plurality of terminals connectable to the lands thereon, a vibrator part integrally projects from one of the sides of the base part and has a substrate-facing surface coplanar with the mounting surface of the base part, the vibrator part has a first electrode layer, a piezoelectric layer, and a second electrode layer which are laminated on the substrate-facing surface, in that order, and the vibrator part vibrates when an AC signal is applied by the AC driving circuit between the first and second electrode layers, and the AC driving circuit is configured such that the central electric field strength of the AC signal is set at a position shifting to the positive direction from the center of a hysteresis loop of the piezoelectric layer.