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六自由度电伺服摆碾成形装备末端位姿单目视觉的测量方法
英文标题:End pose measurement method of six DOF electric servo swing roller forming equipment based on monocular vision
作者:刘勇 郑方焱 韩星会 
单位:武汉理工大学 汽车工程学院 现代汽车零部件技术湖北省重点实验室 
关键词:六自由度 电伺服摆碾成形装备 位姿测量 单目视觉 正交迭代法 
分类号:TH112
出版年,卷(期):页码:2024,49(7):202-209
摘要:

 六自由度电伺服摆碾成形装备末端位姿快速测量是实现装备精确加工的关键。基于单目视觉相机的位姿测量方法快速、有效。首先,利用单目相机采集固定于装备末端上非共面合作目标的初始图像,然后经过图像处理和目标特征提取之后可以得到合作目标的二维图像坐标,实现了将位姿求解问题转换为PnP(Perspective-n-Point)问题,使用正交迭代法对PnP问题求解并进行坐标转换,最终得到六自由度电伺服摆碾成形装备末端位姿。最后,开展了装备精度测量实验,结果表明,装备末端平均位置误差为0.6413 mm,平均角度误差为0.0379°,验证了所提出方法的有效性。

 The rapid measurement of end pose for six degree-of-freedom (DOF) electric servo swing roller forming equipment is the key to achieve the precise machining of equipment, and the pose measurement method based on a monocular vision camera is fast and effective. Therefore, the initial image of non-coplanar cooperative targets fixed to the end of equipment was captured by the monocular camera. Then, through image processing and target feature extraction, the two-dimensional image coordinates of the cooperative targets were obtained, and the transform of the pose solving problem into a PnP (Perspective-n-Point) problem was conducted. Furthermore, PnP problem was solved and transformed into coordinates by the orthogonal iteration algorithm, and the end pose of six DOF electric servo swing roller forming equipment was obtained ultimately. Finally, the precise measurement test of equipment was conducted. The results show that the average position error of the equipment end is 0.6413 mm, and the average angular error is 0.0379°, which verifies the effectiveness of the proposed method.

基金项目:
国家自然科学基金资助项目(U21A20131)
作者简介:
作者简介:刘勇(1999-),男,硕士研究生 E-mail:914251911@qq.com 通信作者:郑方焱(1988-),男,博士,副教授 E-mail:382280761@qq.com
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