基于线结构光视觉的平面度误差测量方法  

Flatness error measurement method based on line structured light vision

作　　者：刘思远 侯跃谦[2] 寇莹 任真 胡正乙 赵雪微[2] 葛云鹏 LIU Si-yuan;HOU Yue-qian;KOU Ying;REN Zhen;HU Zheng-yi;ZHAO Xue-wei;GE Yu-peng(School of Mechanical and Aerospace Engineering,Jilin University,Changchun 130022,China;School of Mechanical Engineering,Changchun University,Changchun 130022,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Production and Education Integration Development Center,Changchun Automobile Industry College,Changchun 130010,China)

机构地区：[1]吉林大学机械与航空航天工程学院,长春130022 [2]长春大学机械工程学院,长春130022 [3]华南理工大学机械与汽车工程学院,广州510641 [4]长春汽车工业高等专科学校产教融合发展中心,长春130010

出　　处：《吉林大学学报（工学版）》2023年第12期3358-3366,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(52005213);吉林省科技发展计划项目(20220201040GX);长春市科技发展计划项目(21ST06)。

摘　　要：针对机械零部件制造及加工领域的平面度测量问题,提出了一种基于线结构光视觉技术的平面度误差测量方法。首先,采集被测平面上不同位置的光条图像,并根据每个位置所对应的光平面方程获得扫描点的空间坐标。其次,对国家标准中平面度误差评定方法进行分析,建立了基于几何约束的平面度误差视觉测量算法。最后,通过本文算法,利用扫描点空间坐标计算出评定基面及平面度误差。在实验中,选择镶块模具的定位面作为被测平面,并将视觉测量结果与采用接触式测量方法获得的结果进行对比,测量误差小于20μm。实验结果表明本文提出的平面度误差测量方法具有一定的可行性,提高了平面度误差的测量效率。Flatness is an important shape deviation.A flatness error measurement method was proposed based on line structured light vision technology for flatness measurement in the field of mechanical component manufacturing and processing.Firstly,the images of light strips were collected,and the spatial coordinates of the scanning points were obtained by the corresponding light plane equation for each position.Secondly,the evaluation methods for flatness errors in national standards was analyzed and a measurement algorithm for flatness errors was established based on geometric constraints.Finally,through the proposed method,the evaluation base plane and flatness errors were calculated using the spatial coordinates of the scanning points.In the experiment,the positioning surfaces of the insert molds are selected as the measured planes,and the measurement results obtained by visual measurement are compared with those obtained by the contact measurement method.The measurement error is less than 20μm.The experimental results show that the measurement method proposed is feasible and improves the measurement efficiency of flatness error.

关 键 词：机器视觉 平面度 线结构光视觉 公差测量 

分 类 号：TH164[机械工程—机械制造及自动化]