摘要
利用贴片机视觉系统,首先通过示教的方法消除第1块印刷电路板(PCB)的定位误差,然后利用对PCB板基准点的图像识别与计算,消除其余PCB板的定位误差和制造误差,从而保证了贴片机的重复贴装精度.本文提出的PCB板误差校正方法和步骤用于所研制的全视觉贴片机样机上,对细间距表面元件的贴装精度可以控制在±50μm以内.
Employing the machine vision system of a mounter, the location error of the first printed circuit board (PCB) can be a (eliminated) firstly by teaching method, then the location error and fabrication error of the other PCB's can be eliminated by identifying the shape, calculating the coordinate of the fiducial mark and comparing with the first PCB. Hence the repeat mounting precision of the mounter meets the mounting requirement. The error correction method for PCB mentioned in this paper was applied in the sample full-vision mounter. The mounting precision for fine pitch component can be controlled within 50 μm.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第6期945-949,共5页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(50390060)
上海市科学技术发展基金资助项目(011111063)
关键词
机器视觉
印刷电路板
误差校正
贴片机
贴装精度
基准点
machine vision
printed circuit board (PCB)
error correction
mounter
mounting precision
fiducial mark
