机器视觉测量中透视投影误差分析控制与补偿  

Control and compensation of perspective projection error analysis in machine vision measurement

作　　者：孙钊 许增朴[1] 王永强[1] 周聪玲[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《计算机工程与应用》2018年第2期266-270,共5页Computer Engineering and Applications

基　　金：天津市科技支撑计划资助项目(No.13ZCZDGX01400)

摘　　要：在机器视觉齿轮倒角的测量系统中,轮廓测量是实现齿轮中心定位的关键因素。传统镜头成像时,由于透视投影特性,会引起齿轮轮廓圆直径的测量误差,进而影响轮廓圆的定位精度。针对此建立了透视投影误差的非线性模型,并对不同厚度齿轮轮廓圆直径的测量进行了误差分析与补偿。实验结果表明,该方法具有一定的实用价值,满足了齿轮轮廓圆测量的要求。In the measurement system of gear chamfering machine vision, contour measurement is the key factor to realize gear center positioning. Traditional lens imaging, due to the principle of perspective projection characteristics, will cause the measuring error of gear profile circle diameter, and then affect the positioning accuracy of the contour circle. The nonlinear model of perspective projection error is established, and the error analysis and compensation of the measurement of the diameter of the gear profile of different thickness are made. The experimental results show that the method has a certain practical value, which meets the requirements of gear profile measurement.

关 键 词：机器视觉 透视投影 非线性模型 误差分析 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]