Method of correcting the gain of a capacitive member, and a device for implementing the method

摘要

A method of correcting the gain of a capacitive member having electrodes that are movable relative to each other including the steps of successively applying to one of the electrodes, reduced bias voltages having opposite signs and a common value below a threshold for which a remanent field generated by said reduced bias voltages can be measured, making corresponding measurements of the output signals from the capacitive member; taking an average, and correcting the gain of the capacitive member as a function of the measured output signal.

主权项

1. A method of correcting the gain of a capacitive member comprising electrodes that are movable relative to each other, with a remanent field established between the electrodes, for detecting and controlling deformation of a mechanical resonator in a vibrating gyro, wherein the method comprises the steps of: applying a reduced DC bias voltage to one of the electrodes, the voltage having a value below a threshold for which a remanent field generated by said reduced bias voltage can't be measured; measuring an output signal from the capacitive member; and calculating a correction for the gain of the capacitive member as a function of the measured output signal, thereby detecting the deformation of the mechanical resonator.