基于机器视觉的半球面微小孔位置的精密测量系统（英文）

发布时间：2018-04-10 20:51

本文选题：测量技术 + 空间位置　；参考：《纳米技术与精密工程》2016年01期

【摘要】：针对精密零件的半球表面上微小功能孔的位置测量需求,研制了一套基于二维扫描机构、图像获取单元和精密隔振工作台的机器视觉测量系统.本文提出了基于二维正交旋转扫描测量微小孔孔间位置的理论方法和数学模型,探讨了在图像处理过程中小孔边缘的提取算法以及小孔空心位置的计算方法.为了验证测量系统对半球面微小孔位置的测量能力,实验中选用了半球面半径为60 mm、小孔半径为2 mm的工件作为测量对象;利用光学准直仪验证了小孔位置的测量重复性和测量精度等性能指标,实验结果显示测量重复性误差为1.0″和1.4″,在微孔位置测量偏差的极大值为2.13″和4.13″.
[Abstract]:A machine vision measurement system based on two dimensional scanning mechanism, image acquisition unit and precision vibration isolation table is developed to meet the need of measuring the position of small functional holes on the hemispherical surface of precision parts.This paper presents a theoretical method and a mathematical model for measuring the position of tiny holes based on two-dimensional orthogonal rotation scanning. The algorithm of extracting the edge of small holes and the calculating method of hollow position of holes in image processing are discussed.In order to verify the measuring ability of the measuring system for the position of the small hole of the hemispherical surface, the work piece with the radius of the half sphere of 60 mm and the radius of the small hole of 2 mm is selected as the measuring object in the experiment.The measurement repeatability and measurement accuracy of the small hole position are verified by optical collimator. The experimental results show that the measurement repeatability error is 1.0 "and 1.4", and the maximum of measurement deviation at the microhole position is 2.13 "and 4.13".
【作者单位】：四川大学制造科学与工程学院;
【基金】：国家自然科学基金资助项目(51405314) 中央高校基本科研业务费专项资金资助项目(2015SCU04A12) 中物院超精密加工技术重点实验室开放基金资助项目(KF15004)
【分类号】：TP391.41;TH71

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