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A method and system for identifying surface defects of wire rods

A technology of defect recognition and identification method, applied in the field of wire surface defect detection, to achieve the effect of improving image recognition speed, accurate recognition, and reducing the recognition area

Active Publication Date: 2022-03-29
佛山名奥弹簧开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a method and system for identifying defects on the surface of wire rods to solve one or more technical problems in the prior art, and at least provide a beneficial option or create conditions

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  • A method and system for identifying surface defects of wire rods
  • A method and system for identifying surface defects of wire rods

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Embodiment Construction

[0047] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0048] Such as figure 1 Shown is a flow chart of a method for identifying wire rod surface defects, combined below figure 1 To describe a method for identifying a surface defect of a wire rod according to an embodiment of the present invention, the method includes the following steps:

[0049] S100, acquiring an internal tomographic image of the wire;

[0050] S200, grayscale the internal tomographic image to obtain a tomographic grayscale image;

[0051] S300, performing corner point detection on the tomographic grayscale image to obtain multiple corn...

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Abstract

The invention discloses a method and system for identifying defects on the surface of wire rods. The internal tomographic image is grayscaled to obtain a tomographic grayscale image; the corners of the tomographic grayscale image are detected to obtain multiple corner points; defects at each corner point are calculated. The number of intersections between the recognition range and the defect recognition range of other corner points; perform line segment detection within the defect recognition range of each corner point, and obtain the longest line segment within the defect recognition range as the trace line to be recognized; identify whether the wire is qualified product; the range area calibrated by the present invention can narrow the recognition area under the premise of a good fit for the defect position, which greatly improves the image recognition speed; it can accurately identify and mark the crack, scratch, pockmark, and fold of the wire and scarring surface defects, and in the subsequent use of the wire, the online equipment automatically recognizes the surface defect marks and manually removes the defects.

Description

technical field [0001] The invention belongs to the technical field of wire rod surface defect detection, and in particular relates to an identification method and system for wire rod surface defects. Background technique [0002] At present, the processing of spring wire can be divided into oil quenching and tempering and cold-drawn lead quenching. There are often surface defects such as cracks, scratches, pockmarks, folds and scars on the surface of the wire, which affect the service life of the spring. Surface cracks exist on the metal surface of the wire rod; scratches are mainly linear groove-like defects in the rolling direction, and are distributed continuously or discontinuously over the entire length of the wire rod; pockmarks are composed of many small pits on the wire rod surface The flaky rough surface of the wire rod, the defects of pitted surface are mainly due to improper cooling of the rolling groove or severe wear; folds are thin lines that are straight or c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/73G06T7/13G06T3/00G06V10/764G06V10/22G06K9/62G01N23/046
CPCG06T7/0004G06T7/73G06T7/13G01N23/046G06T2207/10081G06T2207/30136G06F18/241
Inventor 肖今春陈宇罗宇飞蓝佩宜
Owner 佛山名奥弹簧开发有限公司
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