System for rpm determination of wheel or other rotating body

摘要

The system includes a sensor module (2) comprising a sensor element (SE), a controllable current source (Q) and a part of a signal preparation circuit as well as a modulator (5). The modulator controls the current source, depending on the signals of the sensor element or external signals. Also the sensor module (2) delivers the output signal of the sensor as well as the current signal across stored status or auxiliary signals. The signal preparation circuit contains at least two different signal preparation networks (SC1,SC2), which are connected across a control network (7), depending on specified criteria or conditions between the sensor element and the modulator and takes over the signal preparation.