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

A technology of welding molten pool and auto-focus, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as clogging and affecting welding quality, and achieve the effect of high definition and reliable performance

Inactive Publication Date: 2017-01-04
LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment 1

[0049] Figure 1 to Figure 2 Disclosed in is a digital camera auto-focus system based on a welding pool, including a filter module 1, a camera 2, and an embedded processor 3, and the filter module 1 includes a heat insulating glass 101, a filter 102, The insulating glass 101 and the optical filter 102 are sequentially arranged between the welding workpiece 5 and the camera 2 , the camera 2 is connected to the embedded processor 3 , and the embedded processor 3 is also connected to the control system of the welding equipment 4 .

[0050] The heat insulating glass 101 is arranged between the welding workpiece 5 and the optical filter 102 to isolate the heat generated during the welding pool; the heat insulating glass 101 is mainly responsible for isolating infrared radiation and eliminating the interference of infrared heat radiation.

[0051] The peak wavelength of the optical filter 102 is 6328 Å, and the peak transmittance of the optical filter is 63%; the optical filter 102 ...

Embodiment 2

[0055] An automatic focusing method of a digital camera automatic focusing system based on a welding pool, the method uses an image definition evaluation function to judge adjacent image frames in real time, and uses a climbing method for the image definition curve formed by the image definition evaluation function. Slope method, adjust the focal length magnification of the camera lens in real time, so that the curve point of the image definition evaluation function is at the peak position of the curve, so as to achieve the effect of image clarity; At the peak of the curve, the system adjusts the reverse movement of the camera lens, automatically searches and adjusts the focus to stabilize the image at the clearest point.

[0056] The above-mentioned auto-focusing method of the digital camera auto-focusing system based on the weld pool comprises the following steps (for the flow chart, see image 3 ):

[0057] A. Image preprocessing:

[0058] After the embedded processor rec...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/127
CPCB23K9/1274
Inventor 李水明邵长春
Owner LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE
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