Angular rate sensor for vehicle, has selection oscillator with tines that are arranged at distance and are connected with each other by base, where direct voltage is applied to excitation oscillator that is provided with electrodes

摘要

The sensor has a selection oscillator (24) with tines (21a, 21b) that are arranged at a distance and connected with each other by a base (22). A bar (13) connects an excitation oscillator (11) with the base of the oscillator (24), and piezoelectric films (12a, 12b) are provided. The excitation (11) moves around a bar axis (15) during torsion oscillation, so that the base oscillates around the axis such that the tines are moved in a direction radial to the axis based on coriolis force. A direct voltage is applied to the oscillator (11) that is provided with electrodes.