动态三维测量中图像同步高速投影与采集的原理及实现  

The principle and realization method for the synchronization of high-speed image projection and acquisition in dynamic 3D measurement

作　　者：朱红[1,2] 钟凯[1] 詹国敏 李中伟[1] 史玉升[1] 

机构地区：[1]华中科技大学材料科学与工程学院,武汉430074 [2]武汉职业技术学院机电工程学院,武汉430000

出　　处：《现代制造工程》2015年第4期95-100,共6页Modern Manufacturing Engineering

摘　　要：基于结构光的动态物体三维面形测量对航空航天、能源和汽车等领域的科学研究与工程应用具有重要作用。然而现有测量设备单次测量时间过长,难以实现对动态物体三维面形的测量,其中主要的难点在于图像高速同步投影与采集。提出了一种图像精确同步高速投影与采集的方法,该方法通过实验测定出数字微镜翻转延时和触发曝光延时,设计了帧触发信号、数字微镜翻转、LED光源点亮和相机曝光之间耦合工作的精确时序,从而实现了220帧/秒图像的精确投影与采集,为动态物体三维面形测量设备的开发提供了良好的技术基础。The dynamic 3D measurement base on structured light measurement technology become more and more important in field of industrial aerospace,energy,and automotive.However,the existing device cost a long time for single measurement ,so it’s hard to realize the dynamic measurement ,the main difficulty lies to the synchronization between the projection image and acquisition in a high speed .Propose a method for the exactly synchronization between the projection image and acquisition ,determine the digital micromirror flip time and trigger the exposure time through the experiment ,and design precise timing relationships among the frame trigger signal ,digital micromirror flip ,LED light source and the camera exposure ,so as to realize the 220 fps projection and acquisition image synchronously ,this method provides a good technical basis for the dynamic 3D measurement device development.

关 键 词：结构光测量 动态三维测量 同步投影与采集 

分 类 号：TN209[电子电信—物理电子学]