Hongyu Sun
Oblique Point-Focusing Shear-Horizontal Guided-Wave Electromagnetic Acoustic Transducer With Variable PPM Spacing
Sun, Hongyu; Wang, Shen; Huang, Songling; Peng, Lisha; Wang, Qing; Zhao, Wei
Authors
Dr Qing Wang qing.wang@durham.ac.uk
Associate Professor
Songling Huang
Lisha Peng
Dr Qing Wang qing.wang@durham.ac.uk
Associate Professor
Wei Zhao
Abstract
We realized a phase-coherent oblique point-focusing shear-horizontal (SH) guided-wave electro- magnetic acoustic transducer (EMAT) composed of variable-spacing periodic permanent magnets (PPMs) and racetrack coils. For traditional focusing transducers, the necessary focal position adjustment in defect detection requires a redesign of the coil structure. More conveniently, this new transducer structure arrangement can achieve wave focusing and focal position change by rationally adjusting the layout of the PPM without changing the coil structure. Simulation results show that this newly designed transducer has good focusing performance: it can successfully focus the signal to a preset point, and the signal amplitude is nearly double that of the nonfocusing side. In addition, the focusing performance optimization of the transducer has been studied. The experimental results agree well with the actual location and size of a defect, which verifies the effectiveness of the newly designed focusing transducer in defect detection.
Citation
Sun, H., Wang, S., Huang, S., Peng, L., Wang, Q., & Zhao, W. (2020). Oblique Point-Focusing Shear-Horizontal Guided-Wave Electromagnetic Acoustic Transducer With Variable PPM Spacing. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 67(8), 1691-1700. https://doi.org/10.1109/tuffc.2020.2980621
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 9, 2020 |
Online Publication Date | Mar 13, 2020 |
Publication Date | 2020-08 |
Deposit Date | Aug 18, 2020 |
Publicly Available Date | Mar 28, 2024 |
Journal | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control |
Print ISSN | 0885-3010 |
Electronic ISSN | 1525-8955 |
Publisher | Institute of Electrical and Electronics Engineers |
Peer Reviewed | Peer Reviewed |
Volume | 67 |
Issue | 8 |
Pages | 1691-1700 |
DOI | https://doi.org/10.1109/tuffc.2020.2980621 |
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