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Large-area Piezoceramic Coating with IDT Electrodes for Ultrasonic Sensing Applications

Rathod, Vivek T and Mahapatra, Roy D and Jeyaseelan, Antony A and Dutta, Soma (2013) Large-area Piezoceramic Coating with IDT Electrodes for Ultrasonic Sensing Applications. In: Conference on Smart Sensor Phenomena, Technology, Networks, and Systems Integration, MAR 10-14, 2013 , San Diego, CA.

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Official URL: http://dx.doi.org/10.1117/12.2011495

Abstract

In the present paper, the ultrasonic strain sensing performance of large-area piezoceramic coating with Inter Digital Transducer (IDT) electrodes is studied. The piezoceramic coating is prepared using slurry coating technique and the piezoelectric phase is achieved by poling under DC field. To study the sensing performance of the piezoceramic coating with IDT electrodes for strain induced by the guided waves, the piezoceramic coating is fabricated on the surface of a beam specimen at one end and the ultrasonic guided waves are launched with a piezoelectric wafer bonded on another end. Often a wider frequency band of operation is needed for the effective implementation of the sensors in the Structural Health Monitoring (SHM) of various structures, for different types of damages. A wider frequency band of operation is achieved in the present study by considering the variation in the number of IDT electrodes in the contribution of voltage for the induced dynamic strain. In the present work, the fabricated piezoceramic coatings with IDT electrodes have been characterized for dynamic strain sensing applications using guided wave technique at various different frequencies. Strain levels of the launched guided wave are varied by varying the magnitude of the input voltage sent to the actuator. Sensitivity variation with the variation in the strain levels of guided wave is studied for the combination of different number of IDT electrodes. Piezoelectric coefficient e(11) is determined at different frequencies and at different strain levels using the guided wave technique.

Item Type: Conference Proceedings
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Additional Information: Conference on Smart Sensor Phenomena, Technology, Networks, and Systems Integration, San Diego, CA, MAR 10-14, 2013
Keywords: Ultrasonic; piezoceramic coating; IDT; guided wave; piezoelectric coefficient; structural health monitoring; frequency; large area
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 07 Nov 2013 06:18
Last Modified: 18 Nov 2013 05:32
URI: http://eprints.iisc.ernet.in/id/eprint/47697

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