摘要
设计了由平行光源、双远心镜头、面阵CCD摄像机和待测物等部分组成的高精度线材测径仿真系统。考虑到实验系统是为了模拟完成高速线材的拍摄测量,在线材轧制过程中其径向速度可以高达100 m/s,同时存在横向跳动的迹象,所以在光学设计中采用具有固定放大倍率的远心镜头,确保当物距改变时光敏面上的图像大小不发生变化;并且选用的面阵CCD最快曝光时间可以达到1μs,从而可以得到实时反映被测物体尺寸的高清图像。实验结果表明:使用该仿真系统测量出的工件直径精度可以达到20μm,足以满足生产需要。
A high precision wire diameter measurement simulation system is designed,which is composed of parallel light source,double telecentric lens,CCD camera and object to be tested.Considering that this experimental system is designed to simulate the photography and measurement of high-speed wire,the radial velocity of wire rod can be as high as 100 m/s in the rolling process,and there are signs of transverse runout.Therefore,in the optical design,a telecentric lens with a fixed magnification rate is used to keep the image size on photosensitive surface unchanged when the distance is changed.Moreover,the maximum exposure time of the selected plane array CCD can reach lμs,thus a high-definition image reflecting the size of the measured object can be obtained in real-time.The experimental results show that the diameter accuracy of the workpiece measured by the simulation system can reach 20μm,which can meet the needs of production.
作者
吴海滨
李梦楠
陈新兵
侯东旭
何涛
WU Haibin;LI Mengnan;CHEN Xinbing;HOU Dongxu;HE Tao(Physics and Material Science School of Anhui University,Hefei 230601,China)
出处
《大气与环境光学学报》
CAS
CSCD
2020年第2期154-160,共7页
Journal of Atmospheric and Environmental Optics
基金
科技部创新基金,07C26213400516
关键词
双远心镜头
机器视觉
面阵CCD相机
高速线材
double telecentric lens
machine vision
plane array CCD camera
high speed wire
作者简介
吴海滨(1962-)男,安徽合肥人,硕士,高级工程师,研究生导师,主要从事特种工业电视系列产品的开发设计及图像信息处理等方面的研究,E-mail:whb62@163.com
