The paper shows a new weld metal detection system which adopts active infrared technology on the base of the study of the change of microstructure and chemical ingredient of weld in welding process.

• 文章通过对焊接过程中焊缝显微组织结构和化学成分变化的研究,提出了一种采用主动红外技术对焊缝形位进行检测的新系统。