Cost-effective, vision-based multi-target tracking approach for structural health monitoring

被引:16
作者
Wu, Tong [1 ]
Tang, Liang [1 ]
Shao, Shuai [1 ]
Zhang, Xiang-Yu [1 ]
Liu, Yi-Jun [1 ]
Zhou, Zhi-Xiang [2 ]
机构
[1] Chongqing Jiaotong Univ, Coll Civil Engn, Chongqing, Peoples R China
[2] Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen, Peoples R China
基金
中国国家自然科学基金;
关键词
structural health monitoring; vision-based method; displacement measurement; modal parameter identification; adaptive hierarchical localization algorithm; DYNAMIC DISPLACEMENT; RAILWAY BRIDGE; LOCATION;
D O I
10.1088/1361-6501/ac2551
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The displacement response of structures is an important parameter in structural health monitoring (SHM). Displacement responses can be applied in both structural performance monitoring and structural dynamic characteristics monitoring. To overcome the shortcomings of traditional contact sensors, a vision-based multi-point structural displacement measurement system equipped with an inexpensive surveillance camera and a consumer camera was developed herein. In addition, to reduce the computing time of target tracking, an improved region-matching algorithm based on the prior knowledge of structural deformation was proposed. Numerical results revealed that the improved region-matching algorithm could save computing time without reducing location accuracy. Moreover, static and dynamic loading tests were conducted on a scale model of a suspension bridge to validate the effectiveness of the proposed vision-based measurement system. Displacement responses and modal parameters obtained from the vision-based measurement system were compared with those of traditional contact sensors, and a satisfactory consistency was obtained. Hence, the proposed vision-based measurement system could be a cost-effective alternative to conventional displacement sensors and accelerometers for SHM.
引用
收藏
页数:18
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