Oscillation gyroscope

摘要

An oscillation gyroscope (10) includes an oscillator (11) comprising an equilateral triangular prism-shaped vibrating body (12) and piezoelectric elements (14a) to (14c). An oscillator circuit (26) comprising an inverse amplification circuit (28) and a phase circuit (30) is connected between the piezoelectric elements (14a), (14b) and the piezoelectric element (14c) via resistors (22) and (24). The piezoelectric elements (14a) and (14b) are connected to a differential amplification circuit (32) and the output signal of an addition signal computing unit (34) is added to the output signal of the differential amplification circuit (32). From the addition signal computing unit (34), a signal of the same phase or an inverse phase to the output signal of the phase circuit (30) or an inverse amplification circuit (28) is level adjusted and outputted. A composite signal of the output signal of the differential amplification circuit (32) and the output signal of the addition signal computing unit (34) is detected by a synchronization detection circuit (36) and smoothed by a smoothing circuit (38).