Laser speckle interferometry and its application in acoustic-to-seismic coupling

Chi Wang; Chao Wang; Xiaoqing Zhang

doi:10.1117/12.2666538

27 January 2023 Laser speckle interferometry and its application in acoustic-to-seismic coupling

Chi Wang, Chao Wang, Xiaoqing Zhang

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125500F (2023) https://doi.org/10.1117/12.2666538
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

Shallow underground target detection technology has received more and more attention, such as pipeline detection, cavity detection, underground military facility detection and underground archaeology. Based on the description of the acoustic-to-seismic coupling mechanism, the technology of laser speckle interferometry and its characteristics for acoustic-to-seismic coupling detection methods are summarized and analyzed. The subwoofer based on the sound catheter is used as the sound source excitation module, and the laser speckle interferometry system is used to conduct rapid detection experiments on the vibration characteristics of the ground surface coupled by sound waves, and the changes of laser speckle interference fringes are studied under different experimental conditions such as sound wave intensity and buried environment. Experimental results show that the laser speckle interferometry can be applied to the rapid measurement of acoustic-to-seismic coupling characteristic signals and has broad application prospects in the field of rapid non-destructive detection of flexible shallow buried objects.

Citation Download Citation

Chi Wang, Chao Wang, and Xiaoqing Zhang "Laser speckle interferometry and its application in acoustic-to-seismic coupling", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125500F (27 January 2023); https://doi.org/10.1117/12.2666538

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KEYWORDS

Laser interferometry

Speckle interferometry

Vibration

Technology

Speckle

Laser applications

Vibrometry

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