Quantification of infrared (IR) radiation is a convenient, noncontact method for making the base metal temperature measurements needed for on-line feedback controls. However, the problem of interference from the arc is a complicating factor in applying IR temperature sensing to welding. The objective of this research is to implement and test a top-face, noncontact temperature measurement system...

This paper investigates the dynamic behavior of Gas Metal Arc Welding (GMAW) process for two types of power supplies –inverter and rectifier- for short circuit transfer mode. The large ripples on the rectifier power source are able to perturb the metal transfer mode. In this experimental work some operating points in the short circuit mode have been selected using an automatic pipeline welding ...

This paper presents a passive polarimetry method using a wavefront division optical device in order to measure the temperature distribution at the weld pool surface. We studied thermal emission from a hot liquid metal at a nearinfrared wavelength corresponding to a blind spectral window of the helium plasma generated during Gas Tungsten Arc Welding (GTAW) process. The refractive index of liquid...