激光与光电子学进展, 2019, 56 (4): 041203, 网络出版: 2019-07-31
激光超声表面波在表面缺陷上的反射与透射 
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Reflection and Transmission of Laser Ultrasonic Waves on Surface Defects
激光技术 激光超声可视化 表面波 表面缺陷 反射 透射 laser technology laser ultrasonic visualizationl surface wave surface defects reflection transmission
摘要
采用激光超声可视化技术研究了脉冲激光激励的表面波在不同深度缺陷上的反射和透射,实验得到了表面波在缺陷处的可视化声场。研究结果表明,随着缺陷深度的增大,表面波的反射系数先增大后平缓变化,透射系数先减小后平缓变化。研究结果为裂纹深度的激光超声表面波检测奠定了实验基础。
Abstract
The laser ultrasonic visualization technology is used to study the reflection and transmission of pulsed laser excited surface waves on the defects with different depths. The visualized sound field of the surface wave at the defects is obtained experimentally. The research results show that as the defect depth increases, the reflection coefficient of surface wave first increases and then changes steadily, and however the transmission coefficient first decreases and then changes smoothly. These research results lay an experimental foundation for the quantitative detection of cracks by laser ultrasonic surface waves.
杨连杰, 李阳, 孙俊杰, 邹云. 激光超声表面波在表面缺陷上的反射与透射[J]. 激光与光电子学进展, 2019, 56(4): 041203. Lianjie Yang, Yang Li, Junjie Sun, Yun Zou. Reflection and Transmission of Laser Ultrasonic Waves on Surface Defects[J]. Laser & Optoelectronics Progress, 2019, 56(4): 041203.
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