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针对建筑物特征表面的特性,提出基于横断面的切片点云中心的变形监测方法,利用建筑物的某个侧面点云作为约束面,建立约束面和用于提取切片基准面之间的关系,根据基准面与特征表面点云法向量之间的关系模型,确定最佳基准面搜索方法。利用得到的基准面逐层地确定切片点云,对每个切片点云进行分区段重心的求取,通过计算整个区段重心的中心获取切片的重心。利用无变形的建筑物对点云精度进行评价,并将其用于指导隧道的变形监测。通过对比不同期切片重心的变化实现隧道的变形分析。
Aiming at the characteristics of the building’s characteristic surface, a deformation monitoring method based on the cross-sectional slicing point cloud center is proposed. By using a side point cloud of the building as the constraint surface, the relationship between the constraint surface and the reference plane for extracting the slice is established, According to the model of the relation between the datum and the normal vector of the feature surface, the best reference plane search method is determined. The sliced point cloud is determined layer by layer by using the obtained reference plane, and the center of gravity of each segment point cloud is calculated. The center of gravity of the segment is obtained by calculating the center of gravity of the entire segment. The point cloud accuracy is evaluated using a non-deformable building and used to guide tunnel deformation monitoring. The deformation analysis of the tunnel is carried out by comparing the changes of the center of gravity in different periods.