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

Rathod, VT and Mahapatra, D Roy and Anatony, Jeyaseelan and Soma , Dutta (2013) Large-area Piezoceramic Coating with IDT Electrodes for Ultrasonic Sensing Applications. In: SPIE Proceeding , Smart Structures /NDE, San Diego.

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    Abstract

    In the present work, the ultrasonic strain sensing performance of the 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 has been achieved by poling under DC field. To study the sensing performance of the piezoceramic coating with IDT electrodes to the 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 present study by considering the variation in number of IDT electrodes in the contribution of voltage for the induced dynamic strain. In present work, the fabricated piezoceramic coatings with IDT electrodes have been characterized for dynamic strain sensing applications using guided wave technique at 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 is determined at different frequencies and at different strain levels using the guided wave technique

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Ultrasonic, piezoceramic coating, IDT, guided wave, piezoelectric coefficient, structural health monitoring, frequency, large area
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Other, Other, Other, Materials Science Division
    Depositing User: Ms Indrani V
    Date Deposited: 18 Apr 2013 13:50
    Last Modified: 18 Apr 2013 13:50
    URI: http://nal-ir.nal.res.in/id/eprint/11593

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