基于三频相移的结构光测量系统  

3D Optical Measurement System Based on Three Pitches Heterodyne Method

作　　者：郭进[1] 陈小宁[1] 

机构地区：[1]西南财经大学天府学院,绵阳621000

出　　处：《计算机与数字工程》2016年第7期1267-1270,共4页Computer & Digital Engineering

基　　金：四川省教育厅一般项目"应用于3D打印的三维测量系统研发"(编号:15ZB0475);四川省教育厅一般项目"高精度牙模三维测量系统及关键技术研究"(编号:13ZB0377)资助

摘　　要：基于相移结构光的测量系统在逆向工程等领域得到了广泛应用。传统格雷码与四步相移结合的光栅透射方式,因为相位解包裹算法会引起相位周期性突变,边缘效果差;采用七频的多频外差光栅透射,基于单点相位解包裹避免了相位周期性突变,缺需要采集更多的图片。针对以上问题研究了基于三频相移的结构光测量方式,在投射尽量少的光栅图同时,进行单点解相位。实验验证,该系统可以完成复杂面型测量并且获得高精度点云数据。measurement system based on phase shif structured light has been widely used in the field of reverse engineering.Traditional gray code is combined with the four-step phase shift raster transmission,because the periodic mutation of phase and bad edge effect will be caused by phase unwrapping algorithm.Seven multi-frequency grating heterodyne transmission frequency,Phase Unwrapping based on single point to avoid the periodic mutation,lack of need to collect more pictures.To solve the above problems based on structured light measurement of triple-frequency phase-shifted,in projection grating as little as possible at the same time,single point solution phase.Experimental validation,the system can complete complex surface measurements and to obtain high accuracy point cloud data.

关 键 词：三维测量 标定 三频相移 时间相位展开 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]