Laser-arc hybrid welding quality monitoring system for pipeline based on infrared thermal imaging analyzed technology

In order to acquire the infrared thermal image of the weld pool, Fluke RAYPi20HTRC infrared thermal imager was used in laser-arc hybrid welding process of pipeline. The infrared thermal image was analyzed based on the temperature gradient distribution of the weld puddle. The welding quality was evaluated and the weld defects were recognized by the program. And the time-space information of welding quality was recorded in real time. Laser-arc hybrid welding process quality monitoring experiment of pipeline shows that it works in a stable operation and accurate quality evaluation and defect reorganization. It can provide the important reference for on-site welding quality monitoring and weld quality testing.