基于机器视觉的活塞杆同轴度误差检测研究

王营营; 张学昌; 梁涛

doi:10.13433/j.cnki.1003-8728.2015.1208

基于机器视觉的活塞杆同轴度误差检测研究

doi: 10.13433/j.cnki.1003-8728.2015.1208

1.
浙江大学宁波理工学院机电与能源工程学院, 宁波 315100;
2.
津上精密机床(浙江)有限公司, 嘉兴 314200

基金项目:

国家自然科学基金项目(51075362)、浙江省自然科学基金项目(Y1100073)及宁波市产业技术创新及成果产业化重点项目(2013B10022)资助

详细信息

作者简介:
王营营(1988-),硕士研究生,研究方向为图像测量、机器视觉及应用,wangyingying0503@126.com

通讯作者:
张学昌(联系人),教授,zz_zxc123@163.com

计量
- 文章访问数: 152
- HTML全文浏览量: 31
- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 2014-03-20
- 刊出日期: 2015-12-05

Study on Inspection Method of Coaxial Error for Piston Rod Based on Machine Vision

1.
School of Mechanical and Energy Resource Engineering, Ningbo Institute of Technology of Zhejiang University, Ningbo 315100, China;
2.
Precision Tsugami (China) Corporation, Jiaxing 314200, China

摘要

摘要: 针对活塞杆制造过程中同轴度检测出现的精度低,效率低问题,提出了基于机器视觉技术的活塞杆同轴度误差检测方法,并建立了同轴度误差数学模型。采集活塞杆图像并进行边缘特征提取;将基准圆柱表面分解成240个连续的横截面,待测圆柱表面分解成110个连续的横截面;基于最远Voronoi图计算出每个截面的最小外接圆的圆心,并用最小二乘法拟合出活塞杆圆柱面的轴线。以此方法获得基准轴线,求得零件的同轴度误差,并以某型号的活塞杆进行实验分析,结果与三坐标测量机(CMM)测得的误差结果相吻合,表明该方法可以有效、正确地进行同轴度误差的评定。
- 机器视觉 /
- 活塞杆 /
- 同轴度误差 /
- Voronoi图
Abstract: For low precision and inefficiency in detecting the coaxial error of piston rod, a method to inspect the coaxial error of piston rod based on the machine vision is presented. This method is proposed in terms of the principle of coaxial error, and then a model is developed. The piston image is acquired and the edge feature is extracted; the reference cylindrical surface is decomposed into 240 continuous cross-section, the testing cylindrical surface is divided into 110 continuous cross-section; the circum circle center of each cross-section based on the furthest Voronoi diagram is calculated, and the method of least squares fitting the axis of rod cylindrical surface is used. Datum axis are obtained in this way, thus the coaxial error of piston rod can be calculated. Experimental results of a certain piston rod showed that the present method is effectively evaluated and it is very close to the result measured by Coordinate Measuring Machining (CMM).
- calculations /
- calibration /
- CCD camenas /
- computer vision

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参考文献(16)

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