https://www.intelligent-laser.com/weld-seam-tracking-sensor-technology-introduction.html The welding seam tracking sensor mainly consists of a CCD camera, a semiconductor laser, a laser protection lens, a splash-proof baffle, and a wind cooling device. By using the principle of triangulation, the coordinate information of each point in the laser scanning area is obtained, and the online real-time detection of common welding seams is realized through complex program algorithms, and the robot is guided to adjust the working trajectory according to the scanning data.