基于LabVIEW的小孔尺寸精确测量系统研究  

The Accurate Measurement System for Micropore Diameter Based on LabVIEW

作　　者：杜文华[1] 李红钢[1] 曾志强[1] 王俊元[1] 高琼[1] 

机构地区：[1]中北大学机械工程与自动化学院,山西太原030051

出　　处：《测试技术学报》2013年第4期300-303,共4页Journal of Test and Measurement Technology

摘　　要：针对某药筒底火孔的孔径检测精度和速度要求,采用CMOS相机、光学镜头、计算机及LabVIEW软件等搭建了一套机器视觉系统,采用中值滤波、单阈值分割、闭运算、圆弧拟合等算法,设计了一个针对小孔径的检测方法.经对比实验表明,系统的最大重复性测量误差约为0.4%,测量精度约为4μm.系统对两孔的测量精度都小于5‰,远小于实际测量要求的1%;其测量速度约为5 s,达到了工程测量对测量精度和速度的要求.A machine vision system was built by using CMOS cameras, optical lenses, computer and Lab- VIEW software in order to meet the detect accuracy and speed for a cartridge trigger hole diameter. Median filtering, single threshold segmentation, closing operation, and the arc fitting algorithms were adopted to de- sign a micropore detection method. The comparative experiments show that, the system maximum repeat- ability measurement error is about 0.4 %, the measurement accuracy is about 4/,m, the accuracy of two holes is less than 5 %o which is far less than the actual measurement requirements 1%, and the measurement speed is about 5 s. The results reached the measurement accuracy and speed requirements.

关 键 词：机器视觉 图像处理 孔径测量 测试系统 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]