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Sensors 2015, 15(4), 8444-8463; doi:10.3390/s150408444

Bridge Displacement Monitoring Method Based on Laser Projection-Sensing Technology

1
State Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116000, China
2
School of Electronic Science and Technique, Dalian University of Technology, Dalian 116000, China
3
School of Software Technology, Dalian University of Technology, Dalian 116000, China
4
School of Civil Engineering, Harbin Institute of Technology, Harbin 150000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas Schumacher
Received: 9 January 2015 / Revised: 23 March 2015 / Accepted: 2 April 2015 / Published: 13 April 2015

Abstract

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. View Full-Text
Keywords: laser device; laser spot centroid; video; displacement monitoring laser device; laser spot centroid; video; displacement monitoring
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhao, X.; Liu, H.; Yu, Y.; Xu, X.; Hu, W.; Li, M.; Ou, J. Bridge Displacement Monitoring Method Based on Laser Projection-Sensing Technology. Sensors 2015, 15, 8444-8463.

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