In order to improve the level of automatic welding in CO_2 shielded welding, the tracking system of welding seam based on arc sensor for CO_2 shielded welding is developed in this paper.

• 为了提高CO_2气体保护焊的自动化水平，本文研制了用于CO_2气体保护焊的电弧传感焊缝跟踪系统。