全息图像轮廓线叠差分析桥梁挠度变形的方法

为通过摄影测量手段方便快速地得到整个试验梁的真实挠度,采用Log边缘提取算子提取图像灰度信息和轮廓线信息,再对试验梁下边缘轮廓线进行叠差分析即可得到主梁全息变形数据。通过与传统位移计测量挠度的方法对比发现表明:采用全息图像轮廓线叠差分析桥梁挠度所得结果满足工程应用精度要求;运用此方法,定期采集桥梁轮廓线信息,可以对桥梁进行长期监测,方便快捷找出桥梁的异常变形。

Method of Bridge Deflection Deformation Based on Holographic Image Contour Stacking Analysis

In order to obtain the actual deflection of the whole test beam conveniently and quickly by photogrammetry, the gray information and contour information of the image are extracted by using the Log edge extraction operator, and the data of the holographic deformation can be obtained by the stacking analysis of the edge contour of the test beam. The results show that the result of the analysis of the bridge deflection by the holographic image profile superposition can meet the requirements of the engineering application precision. Using this method to collect the information of the bridge contour regularly, the bridge can be monitored for a long time, and the abnormal deformation of the bridge can be found easily and quickly.