Acoustic Source Localization Method for Lining Cracking of Tunnel Based on Array Signal Processing in Space-frequency Domain
WANG Yunxiao1, LIU Yuanxue1,2,*, YAO Weilai1, MU Rui1, GONG Hongwei1
1 Army Logistics Academy of PLA, Chongqing 401311, China 2 Chongqing Key Laboratory of Failure Mechanism and Protection of Facility in Plateau and Mountain Environment, Chongqing 401311, China
Abstract: Real-time monitoring of cracks plays a vital role in the long-term stability and normal operation of tunnels. It is conducive to the early warning and prevention of tunnel diseases. This work presents a new localization method based on the relationship between the phase difference in the frequency domain of array signal and the azimuth in the spatial domain of sound source. The sound wave generated by lining cracking radiates into the tunnel with the cracking point as the spherical center. The phase difference of the sound signal arriving at the triangle pyramid sensor array is linearly related to the frequency. And the slope is the trigonometric function of the orientation of sound source. The phase difference at multiple frequencies can be obtained in view of the wide frequency characteristics of the sound wave of the lining cracking. The slope can be obtained by linear fitting, and then the orientation of the sound source can be determined. Its three-dimensional coordinates can be determined by the intersection of the azimuth vector and the lining surface. After simulating the sound waves emitted by cracking in the lining of a straight wall arch tunnel under reverberate and noisy condition, the proposed method achieves high positioning accuracy. The numerical simulation of crack localization in Huilongshan tunnel and the field test of a straight wall arch tunnel verify that the proposed method can effectively monitor the crack length and expansion direction of the lining cracks.
通讯作者:
* 刘元雪,陆军勤务学院教授、博士研究生导师,主要从事岩土体本构关系与地下工程稳定性的教学与科研工作。目前主持国家级和省部级项目3项,出版中英文专著各1部,授权发明专利、软件著作权多项,发表论文110余篇,包括Construction and Building Materials、International Journal of Impact Engineering、Bulletin of Engineering Geology and the Environment、《岩土力学》 《岩土工程学报》等。lyuanxue@vip.sina.com
王云潇, 刘元雪, 姚未来, 穆锐, 龚宏伟. 基于阵列信号空频域分析的隧道衬砌开裂声波定位法[J]. 材料导报, 2024, 38(20): 24030104-9.
WANG Yunxiao, LIU Yuanxue, YAO Weilai, MU Rui, GONG Hongwei. Acoustic Source Localization Method for Lining Cracking of Tunnel Based on Array Signal Processing in Space-frequency Domain. Materials Reports, 2024, 38(20): 24030104-9.
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2024, Vol. 38 
