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Proceedings 2017, 1(4), 381; doi:10.3390/proceedings1040381

Effect of Electrode Configuration on High Temperature Thickness Shear Gallium Phosphate Transducer

1
Brunel University London, Kingston Ln, Uxbridge, Middlesex UB8 3HP, UK
2
TWI Ltd., Granta Park, Cambridge CB21 6AL, UK
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 25 August 2017
Download PDF [1018 KB, uploaded 26 August 2017]

Abstract

Gallium phosphate single crystal has a very stable thermal response, ideal for high temperature applications such as transducers for in-service monitoring of HT infrastructure in Power and Oil & Gas industries. Broadband transducers are designed to resonate with a specific mode of vibration within a frequency range of interest. This desired frequency response depends on how the transducer is mounted on the structure and the target defect sensitivity. Electrode configurations are defined to achieve the transducer design. This study investigates the parallel and wrap-around electrode configurations on the transducer response. An electro-mechanical finite element model was developed to analyse the transducer response and predicted a disparity in the modes of vibration between the two configurations within the same frequency range. This model was experimentally validated by measuring the displacement patterns using 3D Laser Doppler Vibrometry.
Keywords: gallium phosphate; thickness shear; electrode configuration; ultrasonic transducer gallium phosphate; thickness shear; electrode configuration; ultrasonic transducer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dhutti, A.; Gan, T.-H.; Mohimi, A.; Balachandran, W.; Kanfoud, J. Effect of Electrode Configuration on High Temperature Thickness Shear Gallium Phosphate Transducer. Proceedings 2017, 1, 381.

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