Research on high-precision hole measurement based on robot vision method  

作　　者：宋丽梅 李大鹏 覃名翠 李宗艳 常玉兰 习江涛 

机构地区：[1]Key Laboratory of Advanced Electrical Engineering and Energy Technology,Tianjin Polytechnic University [2]School of Electrical Computer and Telecommunications Engineering,University of Wollongong

出　　处：《Optoelectronics Letters》2014年第5期378-382,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.60808020 and 61078041);the Tianjin Research Program of Application Foundation and Advanced Technology(No.10JCYBJC07200)

摘　　要：A high-precision vision detection and measurement system using mobile robot is established for the industry field detection of motorcycle frame hole and its diameter measurement. The robot path planning method is researched, and the non-contact measurement method with high precision based on visual digital image edge extraction and hole spatial circle fitting is presented. The Canny operator is used to extract the edge of captured image, the Lagrange interpolation algorithm is utilized to determine the missing image edge points and calculate the centroid, and the least squares fitting method is adopted to fit the image edge points. Experimental results show that the system can be used for the high-precision real-time measurement of hole on motorcycle frame. The absolute standard deviation of the proposed method is 0.026 7 mm. The proposed method can not only improve the measurement speed and precision, but also reduce the measurement error.A high-precision vision detection and measurement system using mobile robot is established for the industry field de- tection of motorcycle frame hole and its diameter measurement. The robot path planning method is researched, and the non-contact measurement method with high precision based on visual digital image edge extraction and hole spatial circle fitting is presented. The Canny operator is used to extract the edge of captured image, the Lagrange interpolation algorithm is utilized to determine the missing image edge points and calculate the centroid, and the least squares fitting method is adopted to fit the image edge points. Experimental results show that the system can be used for the hi gla-precision real-time measurement of hole on motorcycle frame. The absolute standard deviation of the proposed method is 0.026 7 mm. The proposed method can not only improve the measurement speed and precision, but also re- duce the measurement error.

关 键 词：机器人视觉 高精度 测量孔 图像边缘提取 机器人路径规划 CANNY算子 摩托车车架 测量系统 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]