Detection of amplitude, regulation of amplitude and detection of direction of an oscillation of an oscillatory body

摘要

A device is provided for detecting and/or regulating an amplitude of an oscillation of an oscillatory body about an oscillation axis, wherein a change in a capacitance between at least one electrode of the oscillatory body and a stationary electrode takes place during the oscillation of the oscillatory body. The device comprises a detection circuit for detecting a signal representing a measure of the change in capacitance; and an evaluation circuit for determining information from the signal, wherein the evaluation circuit is designed to calculate the amplitude of the oscillation of the oscillatory body from the determined information and an ascertained period of the oscillation of the oscillatory body and/or to regulate the amplitude of the oscillation of the oscillatory body using the determined information and the ascertained period of the oscillation of the oscillatory body.