基于切片点云中心的形变监测

The deformation monitoring based on the center of point cloud of slice

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。

This paper proposes a deformation monitoring method ,based on the center of point cloud of slice . First ,the relationship between the constraint plane and the datum is constructed on one side of the building .The search method of best datum is determined according to the relationship between the datum and normal vectors of point cloud .Second ,the point cloud of slice is determined by using the datum ,and the local center of each part of the slice is computed .The center of slice is determined according to the center of the whole local center .The building of non‐deformation is used to evaluate the point cloud accuracy . Finally ,the deformation monitoring of building is done according to the comparison between different centers of point cloud of slice .