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A model for pulsed Rayleigh wave and optimal EMAT design

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Jian, X., Dixon, S., Grattan, K. T. V. and Edwards, R. S. (Rachel S.) (2006) A model for pulsed Rayleigh wave and optimal EMAT design. Sensors and Actuators A: Physical, Vol.128 (No.2). pp. 296-304. doi:10.1016/j.sna.2006.01.048 ISSN 0924-4247.

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Official URL: http://dx.doi.org/10.1016/j.sna.2006.01.048

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Abstract

A model has been developed for the prediction of the transient displacement of a Rayleigh wave generated by an electromagnetic acoustic transducer (EMAT), operating on the Lorentz principle. This model can be used to calculate Rayleigh waves of arbitrary forces. A linear coil and a spiral coil are considered as two examples. Out-of-plane displacement of the Rayleigh wave is measured experimentally using a Michelson laser interferometer. Good agreement is observed between the calculated and the measured results, demonstrating the value of this method. This paper explains how the Lorentz forces due to the static and dynamic magnetic fields work constructively and destructively, indicating that the orientation of the external magnetic field must be correct to achieve an efficient generation of the Rayleigh wave. (c) 2006 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Sensors and Actuators A: Physical
Publisher: Elsevier S.A.
ISSN: 0924-4247
Official Date: 19 April 2006
Dates:
DateEvent
19 April 2006UNSPECIFIED
Volume: Vol.128
Number: No.2
Number of Pages: 9
Page Range: pp. 296-304
DOI: 10.1016/j.sna.2006.01.048
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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