锻压技术

一种基于双目视觉的轴类锻件几何尺寸测量方法

英文标题：A geometric parameters measurement method based on binocular vision in shaft forging

作者：杨延竹盛佳伟

单位：东华大学

分类号：TG316；TB22

出版年,卷(期):页码：2016,41(3):105-109

摘要：

在大锻件锻造过程中，实时掌握锻件几何尺寸信息才能很好地指导后续生产加工，对提高生产效率和资源利用率有重大影响。传统的离线式人工测量方法逐渐被非接触式测量方法取代。结合热态轴类锻件的特点，提出了一种基于线结构光和双目视觉的轴类大锻件在线测量系统，重点介绍了点云边缘提取、自动化分割、椭圆拟合与关键几何尺寸提取等算法。最后通过实验验证了该测量方法的可行性和准确性，并分析了误差的产生原因。实验结果表明：本系统可在2 min完成1次测量，最大测量长度可达10 m，直径和长度的测量误差可以分别控制在3%和1.5%以内。

In the process of forging, the follow-up production can be guided by obtaining the dimension information in real-time. It has a great influence on improving production efficiency and resource utilization. Therefore, traditional contact measurement technology by hand is replaced by the non-contact measurement method gradually. According to the characteristics of hot shaft forging process, a measurement system in real-time for the large shaft forging was introduced based on structure light and binocular vision, and the algorithms of point cloud edge extraction, automatic segmentation, ellipse fitting and key geometric parameters extraction were introduced emphatically. At last, the feasibility and validity were tested by experiments, and the causes of errors were analyzed. The results show that one measurement can be completed in 2 minutes with the maximum measured length up to 10 meters, and diameter and length of the measurement error can be controlled within 3% and 1.5% respectively.

基金项目：

中央高校基本科研业务费专项资金资助项目（232014D3-41）；2013年上海市企业自主创新专项资金资助项目（4-Z04）

杨延竹(1976-),男,博士,副教授通讯作者：盛佳伟(1990-),男,硕士研究生

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