圆柱金属管件外表面图像在线采集装置构建及关键参数控制优化  

Construction of On-line Image Acquisition Device for Cylindrical Metal Pipe Fittings and Control Optimization of Key Parameters

作　　者：陶国好 刘子豪 徐晓萌[4] 鹿业波 陶凯 洪哲 TAO Guohao;LIU Zihao;XU Xiaomeng;LU Yebo;TAO Kai;HONG Zhe(Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;Jiaxing University,Jiaxing,Zhejiang 314033;Tianjin University,Tianjin 300072,China;China Jiliang University,Hangzhou,Zhejiang 310018,China;Zhejiang Master Hydraulic Pipe Fittings Co,LTD,Jiaxing,Zhejiang 314303,China)

机构地区：[1]浙江理工大学,浙江杭州310018 [2]嘉兴大学,浙江嘉兴314033 [3]天津大学,天津300072 [4]中国计量大学,浙江杭州310018 [5]浙江迈思特液压管件股份有限公司,浙江嘉兴314303

出　　处：《计量学报》2024年第10期1494-1501,共8页Acta Metrologica Sinica

基　　金：浙江省“尖兵领雁”研发攻关计划(2024C04028);浙江省基础公益研究计划项目(LGG21F030013);企业横向课题(00523144)。

摘　　要：提出一种针对圆柱形金属管件的外表面图像在线采集方案,实现高质量成像信息采集。首先,通过获取单个相机所摄二维图像,建立与柱面所覆盖曲面的对应关系,计算二维图像对应的实际管件表面覆盖角度,判断获取管件外表面信息所需的相机数量,采用多相机协同配合圆盘顺时针方向实时采集图像。其次,基于响应曲面设计方法建立多因素实验方案评估镜头的光圈值、相机的曝光时间和增益对图像质量的影响。在可接受最大转速的情况下,确定动态采图时柱面相机和端面相机的最优相机参数,以减小运动模糊影响并提高拍摄效率。最后,在最优参数的基础上,对金属管件图像进行在线实时采集和评估,保留较好质量的管件图像。实验结果满足高质量、细微缺陷清晰的金属表面缺陷检测数据要求,可为后续研究圆柱形金属管件的实时缺陷检测奠定一定的基础。The appearance of defects in cylindrical metal pipe fittings during the production process is random,and it is difficult for traditional mono-and binocular machine vision systems to acquire the full-surface information of the pipe fittings,an on-line image acquisition scheme for the full surface of the pipe fittings is proposed to realize high-quality and all-round imaging information collection.Firstly,by acquiring the two-dimensional image captured by a single camera,establishing the correspondence between the two-dimensional image and the surface covered by the column,calculating the actual pipe surface coverage angle corresponding to the two-dimensional image,and judging the number of cameras required to acquire the full-surface information of pipe fittings,we adopt multi-camera coordination with the real-time acquisition of the image in the clockwise direction of the disk.Secondly,a multi-factor experimental program is established based on the response surface design method to evaluate the effects of aperture value,exposure time and gain of the camera lens on image quality.The optimal camera parameters of cylindrical side camera and cylindrical ends camera are determined at the acceptable maximum speed to reduce the influence of motion blur and improve the efficiency of shooting.Finally,based on the optimal parameters,the images of metal pipe fittings are acquired and evaluated on-line in real-time to retain better quality images of pipe fittings.The experimental results meet the requirements of high-quality,fine defects clear metal surface defect detection data,and lay a foundation for the subsequent study of real-time defect detection of cylindrical metal pipe fittings.

关 键 词：机器视觉 在线检测 圆柱金属管件 外表面图像采集 图像质量 参数优化 

分 类 号：TB96[机械工程—光学工程]