基于光切法的光学玻璃智能定重切割系统  

Intelligent cutting system for limited weight of optical glass based on light sectioning method

作　　者：王蔚 王晓凯[1] 刘慧锋 WANG Wei;WANG Xiaokai;LIU Huifeng(College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China;Shanxi Teamwork Photoelectric Industries Co.,Ltd.,Taiyuan 030006,China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006 [2]山西迪迈沃科光电工业有限公司,山西太原030006

出　　处：《中国测试》2020年第11期83-89,共7页China Measurement & Test

基　　金：山西省重点研发计划项目(201803D121102)。

摘　　要：针对目前国内光学玻璃切割工艺造成的料损及质量离散度较大的问题,以光学玻璃定重切割工艺为研究基础,提出一种基于光切法的质量实时累加式视觉定重方法。根据光切法原理建立定重测量系统,并由3个线型激光器及2台CCD相机测量光学玻璃条料左、右部分的横截面轮廓,再利用Hough变换和最小二乘法提取高精度的激光轮廓中心线直线方程,从而根据直线相交得到轮廓特征点,即可知当前的横截面面积,结合光学玻璃条料的进给量求取每一帧截面之间的体积,根据光学玻璃经验环境下的密度累计得出质量。在智能定重切割实验中,光学玻璃块的质量相对标准差在1%内,实际切割耗损小于0.1 g,表明该装置能高效、精确地进行自动计重切割。In order to solve the problem of material loss and weight dispersion caused by optical glass cutting process in China,a visual method of limited weight was presented by real-time accumulated weight based on light sectioning method in the cutting technology.The limited weight measurement system was established based on light sectioning method.Firstly,the cross-section profile of the left and right half of the optical glass strip were measured by three linear lasers and two CCD cameras.Secondly,the high-precision centre line linear equation was extracted combining Hough transform with least square method,and the cross section area can be known by obtaining the contour feature points based on the intersection of straight lines.Thirdly,the volume between each frame section can be calculated by cross section area and the feed rate of optical glass strip.Finally,the limited weight was obtained by cumulative volume and density under the experience environment.In the intelligent limited cutting experiment,the relative standard deviation of mass is within 1%,and the actual cutting loss is less than 0.1 g,which indicates that the system can complete intelligent cut for limited weight efficiently and accurately.

关 键 词：光学玻璃 线结构光 HOUGH变换 最小二乘法 

分 类 号：X832[环境科学与工程—环境工程]