基于卡尺边缘检测算法的铆接孔径尺寸检测方法研究  

Research on Detection Method of Riveting Aperture Size Based on Algorithm of Caliper Edge Detection

作　　者：张函力 李海伟[2] 于国栋 苗芳 王家明 纪俐 Zhang Hanli;Li Haiwei;Yu Guodong;Miao Fang;Wang Jiaming;Ji Li(School of Mechanical and Electrical Engineering,Shenyang Aerospace Uni-versity,Shenyang 110136,China;不详)

机构地区：[1]沈阳航空航天大学机电工程学院,沈阳市110136 [2]沈阳飞机工业(集团)有限公司 [3]沈阳工业大学机械工程学院 [4]华晨汽车集团控股有限公司

出　　处：《工具技术》2022年第12期141-146,共6页Tool Engineering

基　　金：辽宁省自然科学基金(2019-ZD-0230);辽宁省教育厅青年基金(LJKZ0197);辽宁省教育厅基金(213121022)。

摘　　要：提出了一种基于卡尺边缘检测算法的方法对飞机铆接孔径进行检测。对采集的孔径图进行图像增强,通过数学形态学的膨胀、腐蚀等运算提取锪窝孔外圆的圆环区域,利用卡尺边缘检测算法进行边缘检测,得到各边缘点及其坐标,最后结合RANSAC算法将检测到的边缘点进行圆拟合,产生圆轮廓并获取半径,完成拟合测量。经实验证明,该检测方法具备良好的抗噪性能与亚像素精确定位能力,正确率高,稳定性好,重复测量精度可达到±20μm。Aiming at the problems of detecting the hole diameter of aircraft riveting drill,a detection method based on caliper edge detection algorithm is proposed.The image of the collected aperture map is enhanced,the ring area of the dimple outer circle is extracted through the expansion and corrosion of mathematical morphology.The caliper edge detection algorithm is used to detect the edge points and their coordinates,the detected edge points are fitted with the RANSAC algorithm to generate the circle contour and obtain the radius and the fitting measurement is completed.The experimental results show that the detection method has good anti-noise performance and sub-pixel accurate positioning ability,high accuracy,good stability and repeated measurement accuracy can reach±20μm.

关 键 词：铆接孔径 卡尺边缘检测算法 图像增强 RANSAC算法 亚像素 

分 类 号：TG81[金属学及工艺—公差测量技术] TP391[自动化与计算机技术—计算机应用技术]