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13 November 2019 Ultrasonic wave focusing on flexible array sensors in weld detection
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Proceedings Volume 11343, Ninth International Symposium on Precision Mechanical Measurements; 113431K (2019) https://doi.org/10.1117/12.2548742
Event: International Symposium on Precision Mechanical Measurements 2019, 2019, Chongqing, China
Abstract
A crucial problem of applying ultrasonic guided wave flexible array transducer to weld detection is signal focusing. Thus, this paper proposes two focusing methods applied for array sensor in ultrasonic guided wave weld testing. By exciting every row of the array sensor simultaneously or not, we evaluate two methods on signal focusing. By comparing waveform and maximum amplitudes of focused waves generated by different number of rows in the transducer array, we find out that two proposed methods both have their advantages in guided wave focusing and indicate where these two methods should be used in real applications respectively. In results, the numerical simulations show that the guided wave focused by simultaneous excitation depends on the transducer array dimension, while the guided wave is independently focused by asynchronous excitation.
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Zhenying Xu, Yuanxia Wang, Han Du, and Wei Fan "Ultrasonic wave focusing on flexible array sensors in weld detection", Proc. SPIE 11343, Ninth International Symposium on Precision Mechanical Measurements, 113431K (13 November 2019); https://doi.org/10.1117/12.2548742
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