Bridge Displacement Monitoring Method Based on Laser Projection-Sensing Technology

Sensors

Xuefeng Zhao¹  Hao Liu¹  Yan Yu²  Xiaodong Xu³  Weitong Hu³  Mingchu Li³  Jingping Ou¹ 

[1] State Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116000, China; E-Mails:;School of Electronic Science and Technique, Dalian University of Technology, Dalian 116000, China; E-Mail:;School of Software Technology, Dalian University of Technology, Dalian 116000, China; E-Mails:

关键词: laser device;    laser spot centroid;    video;    displacement monitoring;   

DOI  :  10.3390/s150408444

来源: mdpi

【 摘 要 】

Bridge displacement is the most basic evaluation index of the health status of a bridge structure. The existing measurement methods for bridge displacement basically fail to realize long-term and real-time dynamic monitoring of bridge structures, because of the low degree of automation and the insufficient precision, causing bottlenecks and restriction. To solve this problem, we proposed a bridge displacement monitoring system based on laser projection-sensing technology. First, the laser spot recognition method was studied. Second, the software for the displacement monitoring system was developed. Finally, a series of experiments using this system were conducted, and the results show that such a system has high measurement accuracy and speed. We aim to develop a low-cost, high-accuracy and long-term monitoring method for bridge displacement based on these preliminary efforts.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.