The optimal useful measurement range of an inductive displacement sensor

Abstract

© MIDEM Society. The purpose of this paper is to find the optimal useful measurement range of an inductive displacement sensor with meander type coils. The optimal useful measurement range was numerically examined using a developed model for impedance calculation. The sensor is composed of two sensor elements, with meander-type inductive coils. Each coil has five turns. With these two sensor elements, it is possible to detect normal displacement (using only one sensor element) and tangential displacement (using both sensor elements). Numerical results showed that the optimal useful measurement range was obtained when the gap of 0.23 mm was inserted in one of the coils of sensor element detecting normal displacement. Experimental results confirmed theoretical predictions. The paper demonstrates developing of a model for impedance calculation of an inductive displacement sensor. With this model, it was possible to determine numerically the optimal useful measurement range of the sensor.