The measurement system on chain board of tooth shape chain was established based on computer vision,and a new kind of sub-pixel algorithm for edge orientation of beeline and circle was put forward.

• 构建了基于计算机视觉的齿形链链板的测量系统,对直线和圆的边缘定位,提出了新的亚像素算法,计算了齿形链链板的销孔直径及圆度误差、链板节距和两直边夹角,对测量结果进行了误差分析。