摘要
对飞机壁板铆接孔的定位方法进行了研究,提出了一种基于局部主动轮廓模型的铆接孔定位方法。首先通过基于灰度直方图的全局阈值分割和形心法进行铆接孔的粗定位;然后以粗定位坐标为圆心建立遍历圆,并以遍历圆作为限制条件构造能量圆,建立能量方程求解遍历圆内能量最小的像素点为铆接孔的精定位位置;最后进行视觉引导铆接孔定位试验,试验测得定位误差小于0.05mm,满足飞机壁板自动铆接的工艺要求,且比传统的区域主动轮廓模型定位精度高,具有一定的可行性。
The positioning method of the riveting hole of the aircraft panel is studied. A riveting hole positioning method based on local active contour model is proposed. Firstly, the rough positioning of the riveting hole is performed by global threshold segmentation based on grayscale histogram and shape method. Then a traversal circle with the rough positioning coordinates as the center of the circle is created, and the energy circle is constructed with the traversal circle as the constraint. The energy equation is established to solve the precise positioning position of the rivet hole with the smallest energy point in the traversing circle. Finally, the visual guiding riveting hole positioning experiment is carried out. The experimental measurement of the positioning error is less than 0.05mm, which meets the process requirements for automatic riveting of aircraft panel. Moreover, it has higher accuracy than the traditional regional active contour model and has certain feasibility.
作者
姜春英
闫子龙
牛祥鑫
叶长龙
于苏洋
JIANG Chunying;YAN Zilong;NIU Xiangxin;YE Changlong;YU Suyang(College of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang 110136, China)
出处
《航空制造技术》
2019年第10期58-63,共6页
Aeronautical Manufacturing Technology
基金
沈阳市科技计划项目(F16-216-6-00)
关键词
自动铆接
机器视觉
主动轮廓模型
粗定位
精定位
能量圆
Automatic riveting
Machine vision
Active contour model
Rough positioning
Precise positioning
Energy circle
