Welding deformation real-time detection system and its detection method

Abstract

The invention discloses a welding deformation real-time detection system. The welding deformation real-time detection system is characterized by comprising a CCD camera (4), an environment light source (5), a detection module and a control module, the CCD camera (4) is used for generating a speckle field and forming speckle images on the surface of an irradiated welding workpiece, and then collecting the speckle images on all the stages of welding of the surface of the welding workpiece, the environment light source (5) is used for providing lighting of the surrounding of the welding workpiece when the speckle images are collected, the detection module is used for processing the collected speckle images, and recognizing three-dimensional coordinate changes of a deformation point, on the surface of the welding workpiece, on the speckle images according to the speckle images of all the stages so as to obtain a three-dimensional displacement field and a strain field of the surface of the welding workpiece, and the control module is used for providing electric power support for the CCD camera and having control over the image collection process. According to a detection method of the welding deformation real-time detection system, the cost is reduced, efficiency and accuracy are improved, and the great actual use value, and the economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of deformation measurement, and in particular relates to a real-time detection system for welding deformation and a detection method thereof. Background technique [0002] During welding, due to local high-temperature heating, the temperature distribution on the weldment is uneven, which eventually leads to welding stress and deformation inside the structure. As the weld metal cools, it contracts in volume as it changes from liquid to solid. Since the weld metal is closely related to the base metal, the weld metal cannot shrink freely, which will cause deformation of the entire weldment and cause residual stress in the weld. [0003] The existence of residual deformation not only affects the dimensional accuracy and appearance of the structure, but also may reduce its bearing capacity and mechanical properties, so it is very important to control and adjust welding deformation. Rapid and accurate detection ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a real-time detection system for welding deformation, which solves the shortcomings of traditional welding deformation measurement methods in the prior art

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