Miniaturized Device for SHM Using Electromechanical Impedance Technique

Abstract

Accidents due to the failure of the critical components in automobiles are always common. Generally, cyclic loading and mechanical impact is responsible for the deterioration of their structural integrity. So it is important to monitor the health of the component and damage occurred to automobile components on timely basis to avoid accidents. Various Global and Local techniques are used for structural health monitoring (SHM). This paper deals with the EMI Technique due to its advantages over the other local techniques for SHM. Most importantly, EMI Technique is used in real time. PZT patch is bounded to the component in this technique and a data containing information about the structural integrity is acquired in the form of the Admittance i.e. Conductance and Susceptance by the Impedance Analyser which is highly precise equipment by HIOKI. In this paper piezoelectric material EMI technique is discussed in detailed. Study of data acquiring using AD5933 board. Comparison of data acquired by AD5933 and IM3570 is done which are nearly matched, hence in proposed system hardware reduction and cost cutting is done.