Signal-Processing Interface for Inductive Displacement Sensor

摘要

In this paper, we present a signal processing interface for previously developed inductive displacement sensor, whose inductance is proportional to displacement of sensor elements. This measurement interface is based on measuring of root mean square (RMS) value of voltage on the sensor. This measurement method ensures good accuracy and high measurement rates of very small inductances, order of nH. A hardware realization of signal processing interface is described in details. Measurement results are presented and compared with values measured by impedance analyzer.