Patent ID: 6227048
Filing Date: 2001-05-08
Classification: G01C

Abstract:
A vibrator to be turned around a turning axis (Z) and having a center of gravity (GO), said vibrator comprising a plurality of vibration systems (1A, 1B, 2A, 2B) which are formed within a specified plane intersecting said turning axis, said plurality of vibration systems comprising;a plurality of first vibration systems (1A, 1B) each whose vibration includes a radial vibration component (5A, 5B) with respect to an imaginary circle whose center is coincident with said center of gravity of said vibrator, said first vibration systems being symmetrical about said center of gravity of said vibrator;a second vibration system (2A, 2B) whose vibration includes a circumferential vibration component (6A, 6B) with respect to an imaginary circle whose center is coincident with said center of gravity of said vibrator;means for driving said first vibration systems; andmeans for detecting vibration in said second vibration system.