Patent ID: 8406504
Filing Date: 2013-03-26
Classification: B21C,B23K,G01J

Abstract:
1. A system for monitoring a state of production of electric-resistance-welded pipe which monitors a state of welded parts on-line when forming a steel plate into a tube shape and welding two ends of the steel plate to produce electric-resistance-welded pipe, said system for monitoring a state of production of electric-resistance-welded pipe characterized by having an imaging means for obtaining an image from light emitted from butting surfaces of said steel plate at said welded parts from an upstream side of said welding process, an analyzing means for analyzing a state of the steel plate at said welded parts in a first measurement area and a second measurement area in a plate thickness direction based on image data obtained by said imaging means, wherein the first measurement area has a longitudinal direction length corresponding to a thickness of the steel plate and a horizontal direction length, said first measurement area is set to have the inside ends of the butting surfaces as the center of the lower end of the first measurement area; and wherein the second measurement area encompasses the first measurement area and has at least a horizontal direction length that is greater than the horizontal direction length of the first measurement area, and a displaying means for displaying results of analysis by said analyzing means on a display device.