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Sensors 2016, 16(4), 582; doi:10.3390/s16040582

High Temperature Shear Horizontal Electromagnetic Acoustic Transducer for Guided Wave Inspection

1
Brunel Innovation Centre (BIC), Brunel University, Cambridge CB21 6AL, UK
2
TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, UK
*
Authors to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 28 March 2016 / Revised: 18 April 2016 / Accepted: 19 April 2016 / Published: 22 April 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [6128 KB, uploaded 22 April 2016]   |  

Abstract

Guided Wave Testing (GWT) using novel Electromagnetic Acoustic Transducers (EMATs) is proposed for the inspection of large structures operating at high temperatures. To date, high temperature EMATs have been developed only for thickness measurements and they are not suitable for GWT. A pair of water-cooled EMATs capable of exciting and receiving Shear Horizontal (SH0) waves for GWT with optimal high temperature properties (up to 500 °C) has been developed. Thermal and Computational Fluid Dynamic (CFD) simulations of the EMAT design have been performed and experimentally validated. The optimal thermal EMAT design, material selection and operating conditions were calculated. The EMAT was successfully tested regarding its thermal and GWT performance from ambient temperature to 500 °C. View Full-Text
Keywords: Electromagnetic Acoustic Transducers; EMAT; Guided Wave Testing; high temperature inspection Electromagnetic Acoustic Transducers; EMAT; Guided Wave Testing; high temperature inspection
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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

Kogia, M.; Gan, T.-H.; Balachandran, W.; Livadas, M.; Kappatos, V.; Szabo, I.; Mohimi, A.; Round, A. High Temperature Shear Horizontal Electromagnetic Acoustic Transducer for Guided Wave Inspection. Sensors 2016, 16, 582.

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