| 摘要 |
A vibration gyroscope which is capable of accurately detecting a rotational angular velocity regardless of environmental changes or changes in vibrator characteristics i ncludes a vibrator formed of a vibration element, and first and second piezoelectric elements for dete ction and a third piezoelectric element for driving. Output currents of the first and second p iezoelectric elements are converted into voltages by I-V conversion circuits, or output voltages of th e first and second piezoelectric elements are detected by voltage detection circuits, and then the voltages are added together by an adder circuit. An output signal of the adder circuit is monit ored by a monitor circuit. On the basis of this result, the voltage or the phase of a drive signal fed from an oscillation circuit to the third piezoelectric element is controlled. The output signals of the I-V conversion circuits or the output signals of the voltage detection circuits are formed into a DC si gnal corresponding to a rotational angular velocity via a differential amplifier circuit, a synchron ization detection circuit, a smoothing circuit, and an amplifier circuit.
|
