基于机器视觉的微小冲压零件尺寸测量  

Size measurement of tiny stamping parts based on machine vision

作　　者：黄浩 国联坤 周先彦 吴远进 王涛 李敏芳 Huang Hao;Guo Liankun;Zhou Xianyan;Wu Yuanjin;Wang Tao;Li Minfang(Guizhou Zhenhua Qunying Electric Appliance Co.,Ltd.,Guiyang 550018,China)

机构地区：[1]贵州振华群英电器有限公司,贵州贵阳550018

出　　处：《电子技术应用》2024年第7期59-64,共6页Application of Electronic Technique

摘　　要：针对一种微小冲压零件人工测量效率低、准确度低问题,提出了基于机器视觉的微小冲压零件尺寸测量方法。首先对系统的测量系统设计进行了介绍,然后介绍了测量方法,采用图像处理软件先对提取的图像进行灰度化、去噪点等预处理,再用Canny边缘检测算法进行阈值分割,以提取零件的轮廓。在这些零件的轮廓处理算法上,提出了一种基于RDP算法的轮廓分割方法进行轮廓分割。在边缘定位上,提出了一种基于卡尺工具的边缘点检测方法来提高各类轮廓的边缘定位准确度,然后采用基于Tukey权重函数的拟合算法对直线和圆弧进行测量得到像素尺寸,最后将像素尺寸通过标定转换为物理尺寸。实验结果表明,该设计对微小冲压零件的测量一致性及准确度较高,且具备较高效率。Aiming at the problem of low efficiency and low accuracy of manual measurement of a kind of micro stamping parts,a measurement method of micro stamping parts based on machine vision is proposed.Firstly,the measurement system design of the system is introduced,and then the measurement method is introduced.The image processing software is used to preprocess the extracted image,such as graying and denoising,and then the Canny edge detection algorithm is used for threshold segmentation to extract the contour of the part.In the contour processing algorithm of these parts,a contour segmentation method based on RDP algorithm is proposed for contour segmentation.In the edge positioning,a method of edge point detection based on caliper tool is proposed to improve the accuracy of edge positioning of various contours.Then the fitting algorithm based on Tukey weight function is used to measure the straight line and arc to obtain the pixel size.Finally,the pixel size is converted to physical size through calibration.Experimental results show that the design has high consistency and accuracy for the measurement of micro stamping parts,and has high efficiency.

关 键 词：机器视觉 微小冲压零件 CANNY算法 RDP算法 Tukey算法 尺寸测量 

分 类 号：TM930.12[电气工程—电力电子与电力传动]