Weld Pool Centroid in the Application of Weld Seam Formation Control

Abstract

The weld seam formation is one of the key aspects for welding quality. In this paper,a new method for seam formation control has been proposed, which is based on theweld pool image gray centroid. The tungsten inert gas arc welding is chosen to be theresearched welding technology. Firstly, the experimental system, which is four degreeof freedom, was set up. The composite filtering system was used to filter the weld arcproducing during the welding procession, which is composed by the neutral lightreduction filter and narrow band light filter. Nextly, several welding experiments underdifferent penetration conditions were performed. The CCD camera captured thewelding images and saved them to the computer