Oscillation Gyro Principles
The yaw rate sensor is an oscillation gyro built into the audio-navigation unit. The piezoelectric parts have electric/mechanical transfer characteristics. They bend vertically when a voltage is applied to both sides of the parts and generate a voltage between both sides of the piezoelectric parts when they are bent by an external force. The oscillation gyro functions by utilizing this characteristic of the piezoelectric parts and the Coriolis force. (The Coriolis force deflects moving objects as a result of the earth's rotation.) In the oscillation gyro, this force moves the sensor element when a angular velocity is applied.