| Issue |
MATEC Web Conf.
Volume 145, 2018
NCTAM 2017 – 13th National Congress on Theoretical and Applied Mechanics
|
|
|---|---|---|
| Article Number | 05010 | |
| Number of page(s) | 8 | |
| Section | Non-destructive testing | |
| DOI | https://doi.org/10.1051/matecconf/201814505010 | |
| Published online | 09 January 2018 | |
Application of Synthetic Aperture Focusing Technique for inspection of plate-like structures using EMAT generated Lamb waves
1
Institute of Mechanics, Bulgarian Academy of Sciences, Sofia, Bulgaria
2
Technical University of Sofia, Sofia, Bulgaria
* Corresponding author: mirchev@imbm.bas.bg
The main challenge for guided wave inspection is exact defect characterization and sizing. EMAT generated Lamb waves usually have low signal-to-noise ratio which reduces the defect detection, characterization and sizing capabilities. That's why in most cases the method is used only as a screening tool. The Synthetic Aperture Focusing Technique is a process that increases the signal-to-noise ratio by numerically focusing the acoustic fields. In this paper the application of SAFT is tested over EMAT generated Lamb waves. The improvement of lateral resolution and signal-to-noise ratio is evaluated. Results are presented as a comparison between standard B-scan and SAFT processed data.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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