5Govardhan S M.Real-time welding process control using infrared sensing[C].In: Proceedings of American Control Conference Seattle, Washington June 1995.
6Kim J W, Na S J. Study on arc sensor algorithm for weld seam tracking in gas metal arc welding of butt joints. Proceedings of the Institution of Mechanical Engineers[J]. Part B: Journal of Engineering Manufacture, 1991,205,(B4):247-255.
7Teodiano F B. Weld Seams Detection and Recognition for Robotic Arc-Welding through Ultrasonic Sensors.Industrial Electrunics[C].In:Symposium proceedings,ISIE′94,1994 IEEE International symposium:310-315.