Failure diagnosis method of angular velocity detection device for a circuit, the angular velocity detecting device and angular velocity detecting device

摘要

PPROBLEM TO BE SOLVED: To provide a circuit and device for detecting angular velocity and a method for diagnosing the device for detecting angular velocity, which enhance the accuracy in fault diagnosis without affecting the accuracy in detection of angular velocity. PSOLUTION: The circuit 80 for detecting angular velocity includes a drive circuit 20 which supplies a drive signal to a drive electrode 102 of a vibrator 10, and a detecting circuit 30 which forms an angular velocity detection signal 32 according to the angular velocity, based on signals generated in detecting electrodes 112 and 114 of the vibrator 10. In a fault diagnosis mode, the drive circuit 20 forms an angular velocity false signal and supplies the formed angular velocity false signal to the drive electrode 102 of the vibrator 10, superposing it on the drive signal. In the fault diagnosis mode, the detecting circuit 30 forms the angular velocity detection signal 32, based on a signal propagated by the angular velocity false signal to the detecting electrodes 112 and 114 through the capacitive coupling capacity between the drive electrode 102 of the vibrator 10 and the detecting electrodes 112 and 114 thereof. PCOPYRIGHT: (C)2010,JPO&INPIT