Method and device for motion measurement by capacitive scanning

摘要

The method involves capacitive sensing of a movable dielectric or electrically conducting switching element (5) passed periodically through a measurement arrangement driven by the movement to be measured so as to cause a change in capacitance that is detected and converted into movement information. The measurement arrangement is a capacitor arrangement (1) and the capacitance is determined by measuring the charging or discharging time of the capacitor arrangement or with a capacitive bridge circuit or by transmitting voltage pulses. An Independent claim is also included for an arrangement for implementing the method.