A strip steel surface defect detection method based on a multi-task scheduling mechanism

A defect detection and multi-task technology, which is applied in the direction of optical defect/defect test, measuring device, material analysis through optical means, etc., can solve the problems of defect accuracy and real-time performance, so as to ensure accuracy and speed, improve The effect of processing speed

Active Publication Date: 2018-12-04
WISDRI ENG & RES INC LTD
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method based on multi-task scheduling, aiming at the inadequacy of existing strip steel surface defect detection that cannot detect and report defects in time when the strip speed is fast and surface defects appear intensively. The strip steel surface defect detection me

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  • A strip steel surface defect detection method based on a multi-task scheduling mechanism
  • A strip steel surface defect detection method based on a multi-task scheduling mechanism
  • A strip steel surface defect detection method based on a multi-task scheduling mechanism

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[0043] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0044] Reference figure 1 As shown, create a token lock Lock on the main task of the strip steel surface defect detection system, and initialize the token value of the token lock L=1; create task A on the main task of the strip steel surface defect detection system to respond to the camera image The shooting completion event, refer to figure 2 As shown, each time the camera finishes taking an image, task A reads and collects the image of the strip steel surface taken by the camera, otherwise task A hangs and waits, and task A assigns a number N that is incremented by 1 to the image (the image is named Image N); Create a defect cache queue F to store historical images.

[0045] Create an image processing task B(N), start to perform image processing operations, assign a token with a token value of N to B(N), and when N starts from 1 to collect a new image, N incre...

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Abstract

A strip steel surface defect detection method based on a multi-task scheduling mechanism is disclosed. The method includes creating a token lock, and initializing a token value L as 1; creating a taskA to respond to an event that image photographing is completed by a camera; creating a defect buffer queue F used for storing historic images; creating an image processing task B(N) which performs thresholding operation on an image N to generate a defect labeled graph; checking the task B(N) with the token lock, if the token value L of the token lock is equal to the N, continuing the task B(N) and changing the token value L of the token lock to be N+1, otherwise, suspending the task B(N); and determining a subsequent processing process of the task B(N) according to whether the defect labeledgraph contains a defect pixel or not, the position of the defect pixel and the state of the defect buffer queue F. The multi-task scheduling mechanism is adopted and parallel computing and task synchronization mechanisms are adopted in a defect detection process, thus ensuring defect detection accuracy and speedability.

Description

technical field [0001] The invention belongs to the field of automatic detection system of steel strip surface quality in the metallurgical industry, especially the field of high-efficiency detection of surface defects, and specifically relates to a method for detecting surface defects of strip steel based on a multi-task scheduling mechanism. Background technique [0002] Strip surface defects are an important factor affecting the surface quality of cold-rolled strip, directly affecting the appearance and performance of the final product. The surface inspection system uses camera sensors to scan the surface of the strip to obtain two-dimensional images of the surface of the strip, and uses machine vision technology to detect and classify surface defects. With the improvement of cold rolling technology, the running speed of strip is getting faster and faster. Faster and faster, this also puts forward higher requirements for the rapid response and real-time processing capabil...

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Application Information

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IPC IPC(8): G01N21/88
CPCG01N21/8851G01N2021/888
Inventor 蔡炜叶理德欧燕梁小兵夏志
Owner WISDRI ENG & RES INC LTD
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