摘要
针对钢板在线测量过程存在表面高反光和图像分辨率低的不足,将CCD与偏振成像技术相结合,提出了一种基于偏振光的钢板尺寸测量系统。该测量系统包括硬件和软件两部分,其中硬件部分主要由半导体激光光源、偏振光路、成像镜头、CCD相机以及计算机等部分组成;软件部分包括相机标定、图像预处理、边缘检测及长度计算等算法部分。激光光源辐射出的光首先通过偏振器,然后经过钢板表面反射后,被入射进入检偏器,最后由成像镜头聚焦到CCD的感光面上。采用不同光照强度的LED灯光照射实验,模拟了环境光照强度对钢板尺寸测量的影响。通过与钢板实际尺寸对比,实验表明其相对误差最大为0.42%.该系统利用光的偏振特性,增强了边缘特征信息,提高环境光的免疫能力,可以应用于运动钢板尺寸的在线测量。
Aiming at the defects of high reflective surface error and low image resolution in the online measurement process of steel plate,a steel plate size measurement scheme based on polarized light is proposed,which combines CCD measurement technology with polarization imaging system.The design of the system includes two parts:software and hardware,software includes:monocular camera calibration,image preprocessing,edge detection and other means to extract image edge information;Hardware includes:detection system camera,lens and polarizing path debugging.In this scheme,by using the polarization characteristics of laser,polarizing plate is added in front of semiconductor laser as a polarizing device,and the polarizing plate is added in front of CCD lens as a polarizing device to form a monocular camera measurement system,and the real-time display of measurement data is realized at the PC end.By comparing with the real size of steel plate,the measurement accuracy is greatly improved,and the accuracy error is kept at about 0.3%.The experimental method is expected to be applied to the online measurement of moving steel plate,which verifies the feasibility of the work studied in this paper.
作者
李嘉兴
郭古青
邱选兵
宫廷
田亚莉
孙小聪
李传亮
LI Jia-xing;GUO Gu-qing;QIU Xuan-bing;GONG Ting;TIAN Ya-li;SUN Xiao-cong;LI Chuan-liang(School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment,Taiyuan 030024,China;Shanxi Center of Technology Innovation for Light Manipulations and Applications,Taiyuan 030024,China)
出处
《太原科技大学学报》
2025年第6期580-586,共7页
Journal of Taiyuan University of Science and Technology
基金
国家自然科学基金(52076145,U1810129&12304403)
山西省留学人员科技活动项目(20230031)
山西省省筹资金资助回国留学人员科研资助项目(2023-151)。
关键词
偏振光
在线测量
边缘检测
相机标定
特征提取
polarized light
on-line measurement
edge detection
camera calibration
feature extraction
