激光与光电子学进展, 2018, 55 (7): 071201, 网络出版: 2018-07-20   

基于三维激光扫描的桥梁变形检测及数据处理 下载: 831次

Bridge Deformation Detection and Data Processing Based on 3D Laser Scanning
作者单位
苏州科技大学土木工程学院, 江苏 苏州 215011
摘要
基于脉冲测距原理,利用三维激光扫描仪获取不同工况下模型的点云数据,分别从定性和定量两方面对点云数据进行处理,获得了拱桥关键构件的变形信息。提出一种基于标靶点云的桥梁变形检测方法,即采用以面取点的思路,通过圆形标靶轮廓点云来拟合标靶圆心坐标,以获得构件精确的变形值。此外,利用有限元软件建立模型,将计算结果与位移计测量值、有限元模型分析的结果进行对比。结果表明:该方法结合点云获取的桥梁变形数据具有更高的精度,同时避免了单点测量难以获取结构全面变形的缺点。
Abstract
Based on the principle of pulse ranging, we obtain bridge point cloud data by 3D laser scanner at different cases, and acquire deformation information of key components in this bridge by qualitative and quantitative analyses of point cloud data. In this paper, a new method based on target point cloud is proposed to get precise deformation of key components by fitting the center coordinate through the outline point cloud of circular target. The calculated results are compared with the results of the displacement transducer measurement and the finite element model (FEM) analysis. Comparison results show that the proposed method combined with the bridge deformation data acquired by point cloud has higher accuracy, and it avoids the disadvantage of single point cloud measurement that cannot get the overall deformation of the structure.

邓晓隆, 田石柱. 基于三维激光扫描的桥梁变形检测及数据处理[J]. 激光与光电子学进展, 2018, 55(7): 071201. Deng Xiaolong, Tian Shizhu. Bridge Deformation Detection and Data Processing Based on 3D Laser Scanning[J]. Laser & Optoelectronics Progress, 2018, 55(7): 071201.

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