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Automatic detection method and system for weak and small targets in welding defects

A technology for welding defects and weak targets, which is applied in the direction of optical testing of defects/defects, measuring devices, image data processing, etc., can solve problems such as false positives, poor detection effectiveness of welding defects, etc., to improve detection efficiency, narrow detection range, and accurate mark effect

Active Publication Date: 2020-09-15
CHANGSHU INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automatic detection method and system for weak and small targets in welding defects, which solves the problems of false positives and poor effectiveness of welding defect detection in existing welding defect detection methods

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  • Automatic detection method and system for weak and small targets in welding defects
  • Automatic detection method and system for weak and small targets in welding defects
  • Automatic detection method and system for weak and small targets in welding defects

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] Embodiments of the present invention provide a technical solution:

[0061] like figure 1 As shown, an automatic detection system for weak and small targets in welding defects, including a bench, an industrial camera, a host computer, a light source, a welding workpiece and a workpiece motion control device, the workpiece motion control device and the light source are located on the top of the bench, and the welding One end of the workpiece passes thro...

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Abstract

The invention discloses an automatic detection method and system for weak and small targets in welding defects. The automatic detection method includes the steps: a pre-positioning step: segmenting ato-be-detected object and the strong information foreground and a weak information background of the to-be-detected object; and carrying out primary segmentation of foreground and background on an image by utilizing morphological gray scale reconstruction, then obtaining the edge of a to-be-detected object by utilizing the difference characteristic of a contour so as to carry out secondary segmentation, obtaining seed points from the obtained detection object by utilizing a mean deviation method, and finally obtaining a weak and small defect target on the seed points by utilizing a region growing method. Finally, through experimental verification, the detection system provided by the invention is effective for detecting weak and small targets in welding defects.

Description

technical field [0001] The invention relates to the technical field of automatic detection systems, in particular to an automatic detection method and system for weak and small targets in welding defects. Background technique [0002] Welding is an important means of device connection and construction. The quality of welding has a direct impact on the service life and work performance of the device, which in turn affects the application of the system and people's life experience. Therefore, for defects in the welding process, In particular, the detection of weld defects that play an important role in the rigid connection of devices has extremely strong practical significance. [0003] At present, the detection methods mainly include ultrasonic, ray, magnetic particle and eddy current testing, etc. These methods play an important role in ensuring the welding quality, but there are also certain limitations, such as ultrasonic and eddy current testing are difficult to visually ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/187G06T7/194G01N21/88
CPCG06T7/0004G06T7/11G06T7/187G06T7/194G01N21/8851G06T2207/10004G06T2207/30152G01N2021/8887
Inventor 王飞朱继红
Owner CHANGSHU INSTITUTE OF TECHNOLOGY