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Weld width prediction method before molten pool forming based on mixed spectrum vision

A technology of mixing spectrum and weld width, which is applied in image analysis, image enhancement, instruments, etc., can solve problems such as poor imaging quality, achieve good results, improve accuracy, and reduce device complexity

Active Publication Date: 2019-03-08
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0003] Poor imaging quality of traditional single-band molten pool vision sensing system

Method used

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  • Weld width prediction method before molten pool forming based on mixed spectrum vision
  • Weld width prediction method before molten pool forming based on mixed spectrum vision
  • Weld width prediction method before molten pool forming based on mixed spectrum vision

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Embodiment Construction

[0057] The following is a detailed description of the embodiments in conjunction with the accompanying drawings, but the provided embodiments are not intended to limit the scope of the present invention, and the description of the structure and operation is not intended to limit the order of execution. Any recombination of components Structures, resulting devices with equivalent functions are all within the scope of the present invention.

[0058] The method for extracting the outline of the melting pool based on gradient and grayscale superpixel merging optimization of the present invention obtains the outline of the melting pool image through this method. The online method for predicting the width of the weld before forming based on the molten pool profile includes the following steps:

[0059] Step 1. A passive molten pool vision sensing system based on mixed-spectrum dual-band imaging was established. The two optical paths were respectively filtered with an 850nm high-pass...

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Abstract

The invention discloses a weld width prediction method before molten pool forming based on mixed spectrum vision, which adopts mixed spectrum imaging to provide rich spectrum dimension information formolten pool, can significantly improve imaging quality of molten pool, and is conducive to improving accuracy of molten pool contour extraction. The method comprises extracting the molten pool contour can obtain the external contour features of the image and prepare for the analysis of the geometric characteristics of the molten pool, which is conducive to the visual monitoring of the welding process from the image. The method of the invention realizes accurate prediction of welding seam width before molten pool forming based on mixed spectrum vision, the monitoring of weld pool can be changed from image visual level to three-dimensional visual perception level. The prediction of weld width can help to observe the changes of weld pool more intuitively and adjust the corresponding weldingparameters to control the welding quality.

Description

technical field [0001] The invention belongs to the field of molten pool vision, and relates to a method for predicting the width of a weld before forming a molten pool based on hybrid spectral vision. Background technique [0002] In recent years, with the development of metal welding, welding has been largely automated, and the use of automatic welding has greatly liberated manpower. At the same time, intelligent welding has become very important. At present, many studies on welding quality monitoring are based on visual sensing systems. Using computer vision can perform real-time detection and online control of product quality in the automated welding process. [0003] The image quality of traditional single-band molten pool vision sensing system is poor. [0004] Therefore, a new multi-source quality monitoring method is needed to solve the above problems. Contents of the invention [0005] The technical problem to be solved by the present invention is to provide a m...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/30G06T7/12G06T7/136
CPCG06T7/0004G06T7/12G06T7/136G06T7/30G06T2207/10036G06T2207/30168G06T2207/30108
Inventor 韩静柏连发张毅王克鸿张玉伟赵壮黄煜
Owner NANJING UNIV OF SCI & TECH
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