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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Shujuan Wang Penghao Xin Lei Kang Guofu Zhai |
| Copyright Year | 2010 |
| Description | Author affiliation: School of Electrical Engineering and Automation, Harbin Institute of Technology, China (Shujuan Wang; Penghao Xin; Lei Kang; Guofu Zhai) |
| Abstract | Electromagnetic acoustic technique shows great promise in defect detection and classification for being free of couplant, no requirement of surface preconditioning, and being able to excite pure surface acoustic wave, etc. However, the deficiency of designing theories of electromagnetic acoustic transducers (EMATs) makes its transduction efficiency poor. This paper makes improvement to EMAT design through modeling of the EMAT behavior in steel plate and analyzes the distribution regularity of the eddy current, magnetic field, and Lorentz force produced by a surface wave EMAT. The modeling study gives the influence of EMAT parameters on the energy density of surface wave and the relationship between main structural parameters of the EMAT and the transducer's transduction efficiency, which indicates that, decrease of lift-off distance, coil conductor's width, and magnet's bottom area, and increase of magnet's thickness could effectively improve the transduction efficiency of the EMAT. Finally, the validity and accuracy of the model is verified by experiment. |
| Starting Page | 196 |
| Ending Page | 201 |
| File Size | 518736 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424450459 |
| e-ISBN | 9781424450466 |
| DOI | 10.1109/ICIEA.2010.5516764 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-15 |
| Publisher Place | Taiwan |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Lorentz covariance Steel Surface acoustic waves Electromagnetic coupling Electromagnetic forces Electromagnetic scattering Acoustic signal detection Acoustic waves Acoustic transducers Magnetic analysis transduction efficiency surface detection of steel plate electromagnetic acoustic transducer electromagnetic surface wave |
| Content Type | Text |
| Resource Type | Article |
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