Digital camera auto-focus system and its auto-focus method based on weld pool

Abstract

A digital camera auto-focus system and its auto-focus method based on welding molten pool, it relates to an auto-focus system and its auto-focus method, the system includes a filter module, a camera, an embedded processor, and the filter module includes heat insulating glass , optical filter, heat insulating glass, and optical filter are sequentially arranged between the welding workpiece and the camera, the camera is connected to the embedded processor, and the embedded processor is connected to the control system of the welding equipment; the method is to use the image definition evaluation function The adjacent image frames are judged in real time, and the image sharpness curve formed by the evaluation function is used to adjust the focal length magnification of the camera lens in real time, so that the evaluation function curve point is at the peak position, and the image clarity effect is achieved. The invention can accurately and quickly complete automatic welding video focusing during the welding process without resorting to an external light source, has relatively reliable performance, and is applicable to various welding.

Description

technical field [0001] The invention relates to an automatic focusing system and an automatic focusing method thereof, in particular to an automatic focusing system and an automatic focusing method of a digital camera based on a weld pool. Background technique [0002] A large number of production and processing enterprises need to use welding technology. At present, in many welding processes, due to the different structure of the workpiece itself, the inaccurate welding positioning affects the welding quality. The welding tracking constraints are relatively large, and the relative level of automatic tracking welding is not high. Due to arc radiation, high temperature gas, dust splashes, surface structure, workpiece thermal deformation and other factors during the welding process, the welding torque deviates from the weld seam. The harsh working environment requires arc welding robots to be able to detect the deviation of the weld in real time and adjust the welding route ...

AI Technical Summary

Problems solved by technology

[0003] At present, the automatic tracking system of automatic welding machines commonly used in the market generally adopts two-way contact seam tracking sensor technology, photoelectric sensor technology, non-contact ultrasonic tracking technology, etc. These technologies have relative advantages and disadvantages, such as two-way contact seam tracking technology. The tracking technology can directly detect the position of the welding seam, the method is simple, but when the head runs to the welding spot, it will be blocked; the photoelectric sensor technology will directly affect the welding quality when the welding seam is uneven.

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