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Phased electromagnetic acoustic transducer array for Rayleigh wave surface defect detection
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Xiang, L., Greenshields, David, Dixon, S. and Edwards, R. S. (Rachel S.) (2020) Phased electromagnetic acoustic transducer array for Rayleigh wave surface defect detection. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control . doi:10.1109/TUFFC.2020.2968151 (In Press)
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WRAP-phased-electromagnetic-acoustic-transducer-array-Rayleigh-wave-surface-defect-detection-Edwards-2020.pdf - Accepted Version - Requires a PDF viewer. Download (1885Kb) | Preview |
Official URL: http://dx.doi.org/10.1109/TUFFC.2020.2968151
Abstract
A phased electromagnetic acoustic transducer (EMAT) array system has been developed for detection and characterisation of surface breaking defects. An array of four linear coils which are individually controlled are used to generate a Rayleigh wave. The high current electronics combined with the coil designs enables the array to generate either narrowband or broadband signals, and controlling the phase delay between the channels makes it possible to change the ultrasound wavelength without requiring the physical separation of the coils to be changed. Experimental results show that the four-coil phased array is able to generate a wavelength range from 3.0 mm to 11.7 mm. Surface breaking defects were characterised using a transmit-receive set-up with a broadband EMAT detector being used to detect the Rayleigh wave. Machined surface slots with different depths were used for technique validation. The results show that the array is sensitive to surface defects and that a wide depth sensitivity range for defect sizing can be easily achieved by applying phasing to tune the wavelength of operation. A large increase in detection flexibility is immediately shown.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Rayleigh waves , Acoustic surface waves, Phased array antennas, Acoustic emission testing, Nondestructive testing, Surfaces (Technology) -- Defects | ||||||
| Journal or Publication Title: | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control | ||||||
| Publisher: | IEEE | ||||||
| ISSN: | 1525-8955 | ||||||
| Official Date: | 20 January 2020 | ||||||
| Dates: |
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| Date of first compliant deposit: | 5 February 2020 | ||||||
| DOI: | 10.1109/TUFFC.2020.2968151 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | In Press | ||||||
| Publisher Statement: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | ||||||
| Access rights to Published version: | Restricted or Subscription Access |
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