工程科学学报，第39卷，第6期：917-923.2017年6月 Chinese Journal of Engineering,Vol.39,No.6:917-923,June 2017 D0L:10.13374/j.issn2095-9389.2017.06.015;htp:/journals..usth.edu.cn 基于T-scan测量的薄壁钣金件孔特征重构 张杰，黄翔四，李泷呆，李琦 南京航空航天大学机电学院，南京210016 ☒通信作者，E-mail:xhuangnuaa@163.com 摘要针对目前对薄壁钣金件孔测量的效率低，孔心位置和孔半径测量方法上存在的不足，提出一种基于T-sca测量的 薄壁钣金件孔特征的重构方法.该方法用T-sC对薄壁钣金件上孔进行扫描得到点云数据：根据点云数据中连续点的欧拉 距离将点云数据划分成扫描线点数据：对扫描线点云数据进行算法处理获取位于平面上的点及孔的边缘点：最后对平面上 的点采用稳健特征值平面拟合得出平面参数，利用最小二乘空间圆拟合获取孔心坐标值及孔径大小，完成薄壁孔特征重 构.通过对试验件和薄壁钣金件上孔进行测量处理，实验表明该算法有很好的实用性且精度满足钣金件孔的实际检测精 度要求. 关键词孔特征重构：T-scan:扫描线点云：平面拟合：空间圆拟合 分类号TP391.7 Hole feature reconstruction of thin-walled sheet metal parts based on T-scan measurement ZHANG Jie,HUANG Xiang,LI Shuang-gao,LI Qi School of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China Corresponding author,E-mail:xhuangnuaa@163.com ABSTRACT Due to the low efficiency of the thin-walled hole measurements and the shortcomings relating to the position of the hole and the radius measurement,a method based on T-scan measurements was proposed to reconstruct the characteristics of the hole of thin-walled sheet metal parts.Firstly,point cloud data of a thin-walled hole were obtained with a T-scan,then were sorted into scan line data in accordance with the Euler distance of the successive points in the point cloud data.The points of the plane and the edge points of the thin-walled hole were subsequently gained by processing the scan line point cloud data with an algorithm.Finally,the plane parameters were obtained by applying the robust eigenvalue plane fitting method,which managed the points of the plane,and the hole center coordinates and pore sizes were obtained with the use of the least square circle fitting space.Ultimately,the features of the thin-walled hole were reconstructed.Through measuring and processing test pieces and thin-walled sheet metal parts,this experiment demonstrates that the algorithm can be well applied in practice and that the accuracy meets the requirements of the actual measurement accuracy of sheet metal parts. KEY WORDS feature reconstruction of hole;T-scan;scan line point cloud;plane fitting;spatial circle fitting 薄壁钣金件主要检测特征有外形、轮廓、下陷及 精度高、效率高、柔性好等优点 孔口.在对薄壁钣金件进行检测时，利用数字化测量 孔是零部件上基本的几何形状，如各种零部件、工 设备T-scan可完成对其所有检测特征的测量，且具有 装等的定位孔、叉耳孔及装配孔等)]，在对零部件进行 收稿日期：2016-05-29 基金项目：国家自然科学基金资助项目(51275234)工程科学学报,第 39 卷,第 6 期:917鄄鄄923,2017 年 6 月 Chinese Journal of Engineering, Vol. 39, No. 6: 917鄄鄄923, June 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 06. 015; http: / / journals. ustb. edu. cn 基于 T鄄鄄scan 测量的薄壁钣金件孔特征重构 张 杰, 黄 翔苣 , 李泷杲, 李 琦 南京航空航天大学机电学院, 南京 210016 苣通信作者, E鄄mail: xhuangnuaa@ 163. com 摘 要 针对目前对薄壁钣金件孔测量的效率低,孔心位置和孔半径测量方法上存在的不足,提出一种基于 T鄄鄄scan 测量的 薄壁钣金件孔特征的重构方法. 该方法用 T鄄鄄scan 对薄壁钣金件上孔进行扫描得到点云数据;根据点云数据中连续点的欧拉 距离将点云数据划分成扫描线点数据;对扫描线点云数据进行算法处理获取位于平面上的点及孔的边缘点;最后对平面上 的点采用稳健特征值平面拟合得出平面参数,利用最小二乘空间圆拟合获取孔心坐标值及孔径大小,完成薄壁孔特征重 构. 通过对试验件和薄壁钣金件上孔进行测量处理,实验表明该算法有很好的实用性且精度满足钣金件孔的实际检测精 度要求. 关键词 孔特征重构; T鄄鄄scan; 扫描线点云; 平面拟合; 空间圆拟合 分类号 TP391郾 7 Hole feature reconstruction of thin鄄walled sheet metal parts based on T鄄鄄scan measurement ZHANG Jie, HUANG Xiang 苣 , LI Shuang鄄gao, LI Qi School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 苣Corresponding author, E鄄mail: xhuangnuaa@ 163. com ABSTRACT Due to the low efficiency of the thin鄄walled hole measurements and the shortcomings relating to the position of the hole and the radius measurement, a method based on T鄄鄄scan measurements was proposed to reconstruct the characteristics of the hole of thin鄄walled sheet metal parts. Firstly, point cloud data of a thin鄄walled hole were obtained with a T鄄鄄scan, then were sorted into scan line data in accordance with the Euler distance of the successive points in the point cloud data. The points of the plane and the edge points of the thin鄄walled hole were subsequently gained by processing the scan line point cloud data with an algorithm. Finally, the plane parameters were obtained by applying the robust eigenvalue plane fitting method, which managed the points of the plane, and the hole center coordinates and pore sizes were obtained with the use of the least square circle fitting space. Ultimately, the features of the thin鄄walled hole were reconstructed. Through measuring and processing test pieces and thin鄄walled sheet metal parts, this experiment demonstrates that the algorithm can be well applied in practice and that the accuracy meets the requirements of the actual measurement accuracy of sheet metal parts. KEY WORDS feature reconstruction of hole; T鄄鄄scan; scan line point cloud; plane fitting; spatial circle fitting 收稿日期: 2016鄄鄄05鄄鄄29 基金项目: 国家自然科学基金资助项目(51275234) 薄壁钣金件主要检测特征有外形、轮廓、下陷及 孔[1] . 在对薄壁钣金件进行检测时,利用数字化测量 设备 T鄄鄄scan 可完成对其所有检测特征的测量,且具有 精度高、效率高、柔性好等优点. 孔是零部件上基本的几何形状,如各种零部件、工 装等的定位孔、叉耳孔及装配孔等[2] ,在对零部件进行