Kinematic Motion Modelling from Differential Inductive Oscillation Sensing for a Servomechanism and Electromechanical Devices and Applications

Abstract

This paper presents mathematical modeling approach of an inductive sensor producing oscillating output of a given frequency representing displacement of a core moving in and out of a coil of known geometrical dimensions. The technique is hence used in characterizing the speed, acceleration and frequency of the proposed differential inductive transducer. This model uses a double coil arrangement with a freely movable iron core. This is made to oscillate freely thereby producing the proposed output for characterization of oscillating parameters. The application of this work finds utility in generating small amplitude signals from tiny force winds for the purpose of acquiring impulsive electrical signal from sources such as machine vibrations. Using an inductive coil sensing technique in a differential manner, physical parameters of speed, acceleration and displacement are translated into a signal with proportionate output frequency change. The results shown can be used for characterizing the materials and hence sensor with high sensitivity, linearity and responsiveness in harsh environmental condition is obtained.