基于激光点云数据的叶片型面三维重构  

3D Reconstruction of Blade Surface Based on Laser Point Cloud Data

作　　者：宋俊芳[1] 孙彬 蒲媛媛 许晓宇 王腾蛟 SONG Jun-fang;SUN Bin;PU Yuan-yuan;XU Xiao-yu;WANG Teng-jiao(School of Information Engineering,Xizang Minzu University,Xianyang,Shaannxi 712082,China;School of Optoelectronics Engineering,Xi'an Technological University,Xi'an,Shaannxi 710021,China)

机构地区：[1]西藏民族大学信息工程学院,陕西咸阳712082 [2]西安工业大学光电工程学院,陕西西安710021

出　　处：《计量学报》2023年第2期171-177,共7页Acta Metrologica Sinica

基　　金：国家自然科学基金(62263028);陕西省科技厅自然科学基金(2023-JC-QN-0633);西藏科技厅自然科学基金(XZ202001ZR0065G)。

摘　　要：在四坐标叶片型面检测基础上,提出基于激光点云数据的叶片型面三维重构方法。激光位移传感器对叶片型面进行多视角扫描采样,快速采集叶片型面海量点云数据。运用由点到线到面的数学建模原理,先基于端点一阶导矢连续法拟合出光顺NURBS曲线,再依据分片能量法构建辅助曲面拟合出光顺NURBS曲面,最后对分片NURBS曲面进行统一描述,构造出精确光滑的叶片型面,实现叶片型面的三维重构。实验结果表明:采用该方法实现对各类叶片复杂型面的三维重构,重构误差均<0.015 mm,能够满足精密零件的测量需求。Based on the four-coordinate blade surface detection,a 3D reconstruction method of aeroengine blade surface based on laser point cloud data is proposed.The laser displacement sensor scans and samples the blade surface from multiple perspectives,and quickly collects massive point cloud data of the blade surface.Using the mathematical modeling principle from point to line to surface,firstly fit the smooth NURBS curve based on the first-order guide vector continuity method at the end point,then construct the auxiliary plane to fit the NURBS surface according to the sliced energy method,and finally describe the sliced NURBS surface uniformly,construct an accurate and smooth blade profile,and realize the three-dimensional reconstruction of the blade profile.The experimental results show that this method can realize the three-dimensional reconstruction of various blade profiles well,and the reconstruction error is less than 0.015 mm,which can meet the measurement requirements of precision parts perfectly.

关 键 词：计量学 叶片型面 三维重构 激光点云数据 激光传感器 NURBS曲面 

分 类 号：TB92[一般工业技术—计量学]