Front-view-distance-free butt joint spliced seam composite visual detection system and method

Abstract

The invention belongs to the technical field of automatic welding control, and particularly discloses a front-view-distance-free butt joint spliced seam composite visual detection system and method. The front-view-distance-free butt joint spliced seam composite visual detection system combines a visual measuring device and a spectral measuring device, wherein the visual measuring device is used for collecting an image of a spliced seam at a laser welding point and transmitting the image of the spliced seam into an industrial computer, and comprises a point light source, a CCD camera, an optical lens and a light filter, the CCD camera, the optical lens and the light filter are sequentially connected, a light spot projected by the point light source intersect with a welded molten pool, the CCD camera is located right above the light spot, the spectral measuring device is used for measuring a spectral signal of the plasma at the laser welding point and transmitting the spectral signal into the industrial computer, and comprises a spectrograph and a collimator which are connected with each other, and the collimator is aligned with the molten pool. According to the front-view-distance-free butt joint spliced seam composite visual detection system and method, the molten pool can be directly observed so that the spliced seam position can be stably acquired, the advantages of being accurate in detection, small in error and stable in detection are achieved, and the front-view-distance-free butt joint spliced seam composite visual detection system and method are suitable for detecting the spliced seam during laser welding.

Description

technical field [0001] The invention belongs to the technical field of automatic welding control, and more specifically relates to a compound visual detection system and method for butt joints without forward-looking distance. Background technique [0002] In recent years, the automatic welding technology characterized by visual guidance has been widely used in welding production, and the research on the method of weld detection has attracted more and more attention. Among them, the thin plate butt joint is a relatively common welding joint. form. Since the thickness of the thin plate is generally 1mm to 4mm, if the welding gun deviates slightly from the center of the weld seam, it is very easy to cause welding defects without fusion on the inside. Therefore, the butt welding of thin plates requires high detection accuracy. [0003] Due to the strong welding light, spatter and smoke in welding, the general visual detection device for thin plate seam often only uses one sen...

AI Technical Summary

Problems solved by technology

However, if the seam is deformed or shifted within the distance between the welding point and the measurement point, the visual measurement device cannot detect it. This method of measuring the weld in advance will inevitably introduce measurement errors

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