目标追踪算法在岩石表面变形测量中的实现与应用

doi:10.13722/j.cnki.jrme.2022.0412

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Abstract Deformation measurement is the basis of rock mechanics theory research and engineering practice. Digital image correlation algorithm has been widely used in rock deformation measurement，but there are some problems in practical application，such as poor convergence of displacement cloud edge detection and few quantitative characterization parameters. Based on this，this paper introduces the target tracking method into the field of rock deformation measurement，and proposes a rock surface deformation measurement method based on target tracking algorithm. This method obtains the position of key feature points in the image through Harris corner detection，and then uses KLT algorithm to calculate the corresponding position of tracking points in the deformed image，so as to determine the whole field displacement of rock surface. In order to verify the reliability of the algorithm，indoor rock shear experiments are carried out，and the experimental results of target tracking algorithm and digital image correlation algorithm are compared and analyzed. The results show that the target tracking algorithm can realize the non-contact displacement measurement of rock surface，and the accuracy and stability are improved compared with the digital image correlation algorithm. The target tracking algorithm solves the problems of non convergence and poor stability of the digital image correlation algorithm in the calculation of deformation at the rock edge，and truly realizes the pickup of the whole field displacement within the calculable range. Using information entropy to quantitatively describe the evolution characteristics of rock deformation field in the process of failure is helpful to analyze the mechanical behavior of rock under various complex external loads more comprehensively and accurately. In this study，a new measurement method of rock surface deformation field is proposed，which not only provides an effective technical means for the visual study of rock surface deformation evolution law and damage characteristics，but also provides a certain reference for non-contact deformation measurement in the field of geotechnical engineering.

Key words： rock mechanics target tracking algorithm digital image correlation algorithm deformation measurement the information entropy

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	Articles by authors
	ZHANG Yanbo1
	2
	3
	HAN Xin1
	2
	3
	LIANG Peng1
	2
	3
	YAO Xulong1
	2
	3
	SUN Lin1
	2
	3
	TIAN Baozhu1
	2
	3

Cite this article:

ZHANG Yanbo1,2,3, et al. Realization and application of target tracking algorithm in rock surface deformation monitoring[J]. , 2023, 42(3): 661-671.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0412 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I3/661

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