METHOD FOR MONITORING A ROTATION RATE SENSOR

摘要

The invention relates to a method for monitoring a rotational speed sensor by means of a vibrating gyroscope which comprises a first inlet and a first outlet of a primary control circuit which excites the vibration gyroscope by supplying an exciter signal to the first inlet with a characteristic frequency thereof. The vibration gyroscope also comprises a second inlet and a second outlet part of a secondary control circuit. An output signal can be taken from the second outlet. Said signal is demodulated after amplification and analog/digital conversion into an inphase component and a quadrature component. The components are modulated again after filtering and are combined in order to form a driver signal which is fed to the second inlet. A rotational speed signal is derived from the inphase component, whereupon a test signal is added to the inphase component and the quadrature component, the frequency thereof acting upon lateral bands located in the driver signal, outside the filter area of the second control circuit such that the test signal present after passing through the control loop is monitored in the inphase component and in the quadrature component and an error message is generated when the amplitude is below a predetermined threshold value.