MULTIPARAMETER MEASUREMENT FOR RACEWAY GROOVE OF BEARING BASED ON 3D RECONSTRUCTION WITH DIGITAL STRUCTURED LIGHT

作     者：He Tao Zhong Ming LiWei Zhong Yuning Shi Tielin 

作者机构：School of Mechanical Science and EngineeringHuazhong University of Science and Technology Wuhan 430074 China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2005年第18卷第3期

页      面：470-472页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：This project is supported by National Natural Science Foundation ofChina (No.50375047) 

主　　题：Structured light Fringe projection Phase shifting Multiparameter measurement 3D reconstruction 

摘      要：A fast 3D reconstruction method based on structured light to measure various parameters of the raceway groove is presented. Digital parallel grating stripes distributed with sine density are projected onto the raceway groove by a DLP projector, and distorting of stripes is happened on the raceway. Simultaneously, aided by three-step phase-shifting approach, three images covered by different stripes are obtained by a high-resolution CCD camera at the same location, thus a more accuracy local topography can be obtained. And then the bearing is rotated on a high precision computer controlled rotational stage. Three images are also obtained as the former step at next planned location triggered by the motor. After one cycle, all images information is combined through the mosaics. As a result, the 3D information of raceway groove can be gained. Not only geometric properties but also surface flaws can be extracted by software. A preliminary hardware system has been built, with which some geometric parameters have been extracted from reconstructed local topography.