CCD高速线材测径仿真系统的设计 |
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引用本文: | 吴海滨,李梦楠,陈新兵,侯东旭,何涛.CCD高速线材测径仿真系统的设计[J].大气与环境光学学报,2020,15(2):154-160. |
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作者姓名: | 吴海滨 李梦楠 陈新兵 侯东旭 何涛 |
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作者单位: | 安徽大学物理与材料科学学院,安徽 合肥 230601 |
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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1 us,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20 um,足以满足生产需要。
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关 键 词: | 双远心镜头 机器视觉 面阵CCD相机 高速线材 |
Design of CCD High Speed Wire diameter Measurement Simulation System |
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Affiliation: | Physics and Material Science School of Anhui University, Hefei 230601, China |
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Abstract: | 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 1$\mu$s, 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 20 um, which can meet the needs of production. |
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Keywords: | double telecentric lens machine vision plane array CCD camera high speed wire |
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