基于三维激光点云的船用螺旋桨变形分析

Deformation analysis of marine propeller based on 3D laser point cloud

传统采用螺距仪的测量方式效率低且准确性有待提高,为了准确获取船用螺旋桨的变形情况,提出一种使用三维激光扫描仪对其测量并进行变形分析的方法。在获取多视角的三维激光点云数据后,先进行裁剪去噪的预处理,然后对点云进行基于改进的SAC-IA粗拼接和K-D Tree加速处理的ICP精拼接,并对拼接精度进行分析,最后在CATIA软件中对比基于点云建模拟合的模型与原设计模型,得到船用螺旋桨直观且具体的变形情况,验证了该方法的可行性。

The traditional measurement method using pitch instrument has low efficiency and its accuracy needs to be improved.In order to accurately obtain the deformation of marine propeller,a method using 3D laser scanner to measure and analyze its deformation is proposed.After obtaining the 3D laser point cloud data from multiple perspectives,the pre-processing of clipping and de-noising is carried out first,and then the point cloud is processed by the improved SAC-IA coarse splicing and ICP fine splicing accelerated processing of K-D Tree,and the accuracy of the splicing is analyzed.Then the simulation model based on the point cloud is compared with the original design model in CATIA software.The direct and specific deformation of marine propeller is obtained,which verifies the feasibility of this method.