Application of Synthetic Aperture Focusing Technique for inspection of plate-like structures using EMAT generated Lamb waves

被引：0
作者：
Mirchev, Yordan [1 ]
Staykov, Krasimir [2 ]
Ganchev, Damyan [2 ]
机构：
[1] Bulgarian Acad Sci, Inst Mech, Sofia, Bulgaria
[2] Tech Univ Sofia, Sofia, Bulgaria
来源：
13TH NATIONAL CONGRESS ON THEORETICAL AND APPLIED MECHANICS (NCTAM 2017) | 2018年 / 145卷
关键词：
D O I：
10.1051/matecconf/201814505010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：8
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