Enhancement of signal amplitude of surface wave EMATs based on 3-D simulation analysis and orthogonal test method

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• 作者：Lei Kang ; Steve Dixon ; Kaican Wang ; Jingmin Dai
• 关键词：Electromagnetic acoustic transducer ; Surface waves ; 3-D simulation analysis ; Optimal design ; Orthogonal test method
• 刊名：NDT and E International
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：59
• 期：Complete
• 页码：11-17
• 全文大小：1544 K

文摘

The amplitude of an ultrasonic signal generated by electromagnetic acoustic transducers (EMATs) is typically low when compared to those generated by contacting transducers, which restricts the application of EMATs in the fields of nondestructive testing and nondestructive evaluation. The transmission process of a surface wave EMAT is studied, based on a previously established 3-D model, with the aim of enhancing the amplitude of ultrasonic waves generated by the EMAT. The effect of changing various EMAT parameters on the surface wave is investigated, by utilizing the orthogonal test method. Results indicate that after optimization, the signal amplitude of the EMAT has increased by 25.2 % .