A Method for Extracting the Center Point Coordinates of Grid Spherical Joints Based on Laser Point Cloud
The large-span special-shaped space grid structure is widely used in large-scale public construction projects,but there are a lot of spherical components in this kind of structure,and the measurement accuracy and efficiency of the traditional total station monitoring method are low.Therefore,an efficient automatic detection method based on laser point cloud for the center point coordinates of spherical joints of large-span special-shaped space grids is proposed.3D laser scanning is used to obtain the point cloud data of the structural shape of the steel structure roof,and then the noise reduction process is carried out on the point cloud.The deepening design model is used to set the space domain according to the accuracy requirements of the subsequent processes,and the target point cloud is extracted.Finally,the programming algorithm is used to achieve automatic batch extraction of the center point coordinates of the welded spherical joints.In order to verify the accuracy of the fitting spherical center point,the radius of the spherical joint of the design model and the reconstructed spherical joint of the point cloud are compared.Taking the welded spherical joints of the large-span special-shaped space grid in Hangzhouxi Railway Station as the analysis object,the results show that the coordinates of the large-span special-shaped space grid spherical joints extracted by this method are of high precision,greatly improved in efficiency,and the method has a good engineering application prospect.
万方数据
维普
