Tracing method based on visual inspection for butt-jointed seam

The linear structured light tracing method is available for general welding seam.But for butt-jointed seam of sheet metal,which is widely used in industrial production,this method is unsuitable,because the width of the welding seam is too small to get character.A new tracing method for butt-jointed seam has been developed.First,some initial characteristic points have been found by line scan.Then,we set a threshold value for their increments and delete some of them,so we get rid of the influence of spot welding area.The linear fitting process has also been accelerated by random sampling method.This arithmetic is efficiency and stable.