Weld defect characteristic parameter extraction method

A technology for welding defects and extraction methods, applied in the field of image processing, can solve the problems of complex process, long calculation time, unfavorable real-time detection of welding defects, etc., and achieve the effect of improving the recognition speed and reducing the dimension.

Active Publication Date: 2016-05-18
美光(江苏)三维科技有限公司
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Problems solved by technology

Among them, the wavelet analysis method and the Fourier transform method belong to the frequency domain processing method, the process is more complicated, the calculation time is relatively long, which is not conducive to the real-time detection of welding defects, and the defect characteristic parameter representation method is due to the diversity and flexibility of the selected parameters. It is widely used in welding defect detection

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  • Weld defect characteristic parameter extraction method
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Embodiment Construction

[0067] The technical solution of the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0068] Such as figure 1 Shown is the process of a method for extracting characteristic parameters of welding defects according to the present invention, which specifically includes the following steps:

[0069] Step 1. Obtain the weld image;

[0070] The image acquisition system includes: an acA2500-14gm industrial camera from Basler, and an ADLINK

[0071] PCIE-Gie64 image capture card, an industrial computer and field welding device. The entire system uses an industrial computer as the main controller, and realizes the collection of the circular saw blade image through the embedded PCIE-Gie64 image capture card. The measured weld is irradiated by the transmission light source and then imaged on the industrial camera CCD, which is captured by the image capture card The weld image is transferred to the computer to obtain the weld...

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Abstract

The invention discloses a weld defect characteristic parameter extraction method. The method comprises steps as follows: a weld joint image is acquired; the weld joint image is preprocessed; the weld joint image is subjected to binarization segmentation; the background of the weld joint image is removed; a weld defect is marked; geometrical characteristic parameters of the weld defect are extracted. According to the weld defect characteristic parameter extraction method, early preparations are made for classification and recognition of the weld defect by acquiring the perimeter, the area, the circularity and other geometrical characteristic parameters of the weld defect, main characteristic information of the weld joint is reserved, reliable guarantee is provided for recognition of the weld defect, the dimensionality of characteristic data of the weld defect is reduced, and the recognition speed of the weld defect is increased.

Description

Technical field [0001] The invention belongs to the technical field of image processing, and particularly relates to image feature extraction, and specifically, to a method for extracting welding defect feature parameters. The invention extracts geometric characteristic parameters such as the circumference, area and circularity of welding defects from the entire weld image, so as to facilitate classification and identification of welding defects. The method can be used in the technical field of online inspection of welding quality. Background technique [0002] With the development of modern industrial technology, welding, as an important processing technology, is currently widely used in machinery manufacturing. For welding products, the quality of welding determines the quality of the entire product. In the welding process, due to the influence of the working environment, welding components will inevitably have defects. Common defects include cracks, pores, slag inclusions, a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95
CPCG01N21/95
Inventor 齐继阳唐文献李钦奉李金燕王凌云魏赛陆震云
Owner 美光(江苏)三维科技有限公司
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