独立模型法点云拼接在建筑倾斜监测中的应用

Independent Model Method of Point Cloud Splicing and Its Application in Building Tilt Monitoring

针对建造结构复杂高层建筑倾斜监测需求,介绍了一种基于地面三维激光扫描仪,结合独立模型法多站点云拼接的高层建筑倾斜变形的监测方案,研究其点云拼接原理、棱线提取和监测技术路线。通过拟合标靶球点云球心的三维坐标,与同名点控制坐标进行坐标转换,实现点云拼接。提取建筑点云模型两平面的交线即建筑物棱线,计算倾斜度。工程实践表明以独立模型法作为点云拼接的理论基础,点位空间误差为M_(S)=1.743 mm,满足建筑物变形观测要求。可实现对复杂高层建筑倾斜监测,相比于传统倾斜监测方法的外业工作量可缩短近60%,且精度高,可靠性强。

Aiming at the needs of tilt monitoring of high-rise buildings with complex structures,this paper introduces a monitoring scheme of tilt deformation of high-rise buildings based on three-dimensional laser scanner on the ground and combined with independent model method of multi-site cloud Mosaic,and studies its point cloud Mosaic principle,prism line extraction and monitoring technology route.By fitting the three-dimensional coordinates of the center of the target spherical point cloud,coordinate transformation is carried out with the control coordinates of the same name point to realize point cloud splicing.The intersection lines of the two planes of the building point cloud model are extracted and the inclination is calculated.Engineering practice shows that the independent model method is used as the theoretical basis for point cloud splicing,and the point space error is M_(S)=1.743 mm,which meets the requirements of building deformation observation.It can realize the tilt monitoring of complex high-rise buildings.Compared with the traditional tilt method,the field workload can be shortened by nearly 60%,with high precision and strong reliability.