基于双目立体视觉的齿轮端面高度测量方法  

Measuring Method of Gear End Face Height Based on Binocular Stereo Vision

作　　者：李帅康 乔超 洪荣晶[1] 胡敏 Li Shuaikang;Qiao Chao;Hong Rongjing;Hu Min

机构地区：[1]南京工业大学机械与动力工程学院,南京市211816

出　　处：《工具技术》2023年第10期135-138,共4页Tool Engineering

基　　金：国家自然科学基金(51635003);江苏省科技成果转化专项资金资助(BA2017099);江苏省研究生科研与实践创新计划资助(KYCX22_1282)。

摘　　要：为了实现齿轮端面高度的高精度非接触式测量,提出基于双目立体视觉的齿轮端面高度测量方法。创新性地使用可滑动固定基线距离的单目CCD相机代替传统的双目相机获取齿轮双目图像。在获取双目图像后,通过双目相机标定实现齿轮图像立体矫正。基于改进的SGBM算法对矫正后的双目图像进行立体匹配,获取视差图和相机坐标系下平面三维坐标点,对上下平面的三维坐标点进行最小二乘拟合,从而获取上下平面的深度信息,上下平面深度相减即可实现齿轮端面高度的测量。使用直齿轮进行了视觉测量实验,实验结果表明,提出的测量系统及方法具有较高的精度和稳定性。To realize the high-accuracy non-contact measurement of gear end face height,a method of gear end face height measurement based on binocular stereo vision is proposed.A monocular CCD camera with sliding fixed baseline distance is innovatively used instead of the traditional binocular camera to acquire binocular images of the gear.After acquiring the binocular images,the stereo correction of the gear image is realized through the calibration of the binocular camera.Finally,based on the improved SGBM algorithm,stereo matching is performed on the corrected binocular images to obtain the parallax map and the three-dimensional coordinate points under the camera coordinate system.The three-dimensional coordinate points of the upper and lower planes are fitted by the least squares method,so as to obtain the depth information of the upper and lower planes.The height of the gear end face can be measured by the depth subtraction of the upper and lower planes.A spur gear is used for visual measurement experiment.The experimental results show that the proposed measurement system and method have high accuracy and stability.

关 键 词：双目视觉 齿轮测量 改进SGBM算法 最小二乘拟合 

分 类 号：TG806[金属学及工艺—公差测量技术] TH124[机械工程—机械设计及理论] TP391[自动化与计算机技术—计算机应用技术]