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| Three-dimensional Detection Method for Bridge Surface Defects Based on Line-shaped Lasers |
| YU Yong-bo1,2, LI Wan-heng2, ZHANG Jin-quan2, NIE Jian-guo1 |
1. School of Civil Engineering, Tsinghua University, Beijing 100084, China;
2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China |
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Abstract The measurement and description of the three-dimensional (3D) parameters of bridge surface defects are common technical problems in the field of bridge defect detection. These problems are difficult to solve through conventional methods. However, with the assistance of line-shaped lasers, 3D structure measurements can be converted to two-dimensional ones. Based on an analysis of the applications of 3D measurement techniques in other industries, a 3D measurement method for bridge surface defects is proposed. In this method, the parameters of line deformation are measured using digital imaging and pattern recognition techniques, and then the 3D parameters of bridge surface defects are calculated. The computational formula is also deduced. Subsequently, the feasibility of the method is verified by experiments.
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Received: 11 November 2012
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| Fund:Supported by the Road and Transport R&D Project for Western Regions of China Commissioned by Ministry of Transport (No.200831822343) |
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Corresponding Authors:
YU Yong-bo, rbstyyb@126.com
E-mail: rbstyyb@126.com
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2013, Vol. 7 
