中国物理B ›› 2021, Vol. 30 ›› Issue (7): 74301-074301.doi: 10.1088/1674-1056/abf91d

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An ultrasonic multi-wave focusing and imaging method for linear phased arrays

Yu-Xiang Dai(戴宇翔)1,2, Shou-Guo Yan(阎守国)1,†, and Bi-Xing Zhang(张碧星)1,2   

  1. 1 Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2021-03-05 修回日期:2021-03-27 接受日期:2021-04-19 出版日期:2021-06-22 发布日期:2021-07-09
  • 通讯作者: Shou-Guo Yan E-mail:yanshouguo@mail.ioa.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11774377).

An ultrasonic multi-wave focusing and imaging method for linear phased arrays

Yu-Xiang Dai(戴宇翔)1,2, Shou-Guo Yan(阎守国)1,†, and Bi-Xing Zhang(张碧星)1,2   

  1. 1 Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2021-03-05 Revised:2021-03-27 Accepted:2021-04-19 Online:2021-06-22 Published:2021-07-09
  • Contact: Shou-Guo Yan E-mail:yanshouguo@mail.ioa.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11774377).

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摘要： To overcome the inherent limits of traditional single wave imaging for nondestructive testing, the multi-wave focusing and imaging method is thoroughly studied. This method makes the compressional waves and shear waves focused in both emission and reception processes, which strengthens the focusing energy and improves the signal-to-noise ratio of received signals. A numerical model is developed to study the characteristics of a multi-wave focusing field. It is shown that the element width approaching 0.8 wavelengths of shear waves can keep a balance between the radiation energy of two waves, which can achieve a desirable multi-wave focusing performance. And an experiment using different imaging methods for a linear phased array is performed. It can be concluded that due to the combination of the propagation and reflection characteristics of two waves, the multi-wave focusing and imaging method can significantly improve the imaging distinguishability of defects and expand the available sweeping range to a sector of -65° to 65°.

关键词: multi-wave focusing, ultrasonic imaging, phased array, non-destructive testing

Abstract: To overcome the inherent limits of traditional single wave imaging for nondestructive testing, the multi-wave focusing and imaging method is thoroughly studied. This method makes the compressional waves and shear waves focused in both emission and reception processes, which strengthens the focusing energy and improves the signal-to-noise ratio of received signals. A numerical model is developed to study the characteristics of a multi-wave focusing field. It is shown that the element width approaching 0.8 wavelengths of shear waves can keep a balance between the radiation energy of two waves, which can achieve a desirable multi-wave focusing performance. And an experiment using different imaging methods for a linear phased array is performed. It can be concluded that due to the combination of the propagation and reflection characteristics of two waves, the multi-wave focusing and imaging method can significantly improve the imaging distinguishability of defects and expand the available sweeping range to a sector of -65° to 65°.

Key words: multi-wave focusing, ultrasonic imaging, phased array, non-destructive testing

中图分类号:  (General linear acoustics)

  • 43.20.+g
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound) 43.38.+n (Transduction; acoustical devices for the generation and reproduction of sound)