线结构光与CMM集成测量系统一体化标定方法  

The integrated calibration method of CMM and line structured light integrated system

作　　者：李硕[1] 杨雪荣[1] 成思源[1] 张湘伟[1] Li Shuo Yang Xuerong Cheng Siyuan Zhang Xiangwei(School of Electromechanical Engineering, Guangdong University of Technology, Key Laboratory of Innovation Method and Decision Management System of Guangdong Province, Guangzhou 510006, China)

机构地区：[1]广东工业大学机电工程学院广东省创新方法与决策管理系统重点实验室,广州510006

出　　处：《现代制造工程》2016年第12期128-132,共5页Modern Manufacturing Engineering

摘　　要：线结构光三维视觉与三坐标测量机(CMM)测量系统的集成能够实现对复杂零件表面快速高精度的测量。系统的标定是实现集成测量的关键步骤,包括摄像机内外参数标定,光平面结构参数标定和两个测量系统测量坐标的全局统一。提出了线结构光与CMM集成测量系统一体化标定方法,首先采集多幅不同位姿下带有光条纹的2D靶标图像,然后利用CMM接触测头测量得到某一位姿2D靶标角点在CMM坐标系下的世界坐标,利用交比不变原理求取靶标上特征点的三维坐标,进而求取线结构光视觉传感器测量参数和线结构光传感器测量数据到CMM坐标系下的转换矩阵,实现一次数据采集完成集成系统所有测量参数的标定,标定方法简单且精度和效率较高。The integrated measurement system of line structured light vision integrated with Coordinate Measuring Machine （CMM） can achieve rapid and high precision measurement for the surface of the complex parts. The calibration of the system is a key step for the integrated measurement, including the calibration of the intrinsic and extrinsic parameters of the camera, the structured parameter of the light plane, and the global combination of the coordinate of the two measuring systems. The integrated alibration method of CMM and llne structured light integrated system is proposed. At first,several different positions of 2D target image with light stripes are collected, and then the coordinates of a certain position of 2D target corner points are obtained using the CMM contact measurement. Then the 3D coordinates of the feature points on the target are gained using the principle of cross ratio invariability. Then the line structured light vision sensor measuring parameters and the conversion matrix from the line structured light sensor measuring data to the CMM coordinates are acquired, and all measuring parameters of the integrated system are achieved using a data acquisition. The calibration method is simple and owns high precision and efficiency.

关 键 词：线结构光 CMM测量系统 集成 标定 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]