The problem of searching the center of weld fleetly and exactly is the key of automatic welding system, so a welding seam tracing system based on CCD was presented.

• 快速而准确地寻找到焊缝中心的位置是实时焊缝跟踪系统要解决的首要问题,文中提出一种基于视觉传感器CCD的焊缝跟踪系统。