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Scanning land steel surface detercting method and apparatus

A surface inspection and scanning technology, applied in the direction of testing moving boards, optical testing flaws/defects, etc., can solve the problems of multiple cameras and computers, large investment, etc., and achieve low hardware cost, high detection efficiency, and stable surface quality Effect

Inactive Publication Date: 2004-06-30
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0003] The present invention overcomes the defect that the existing strip steel surface defect detection method and device need to be equipped with many cameras and computers, and requires a large investment, and provides a scanning strip steel surface detection method and device, which can realize the detection process of the strip steel surface defect. , with lower hardware cost and practical system configuration, for the detection of more significant defects or continuous small defects, improve the performance-price ratio and detection accuracy of the detection device

Method used

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  • Scanning land steel surface detercting method and apparatus
  • Scanning land steel surface detercting method and apparatus
  • Scanning land steel surface detercting method and apparatus

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Embodiment Construction

[0010] see figure 1 , figure 2 and image 3 , a scanning type steel strip surface detection method is that panoramic camera 1 carries out global range detection to the head and width of strip steel 7, obtains the detection image and inputs it into computer 6 through the image card, and scanning camera 2 starts reciprocating scanning according to the width of strip steel 7 Detection, the panoramic camera 1 performs full-width detection, and performs defect judgment after finding the target. If no, perform full-width detection again; yes, perform defect judgment. Perform defect detection, (3) perform area analysis on defects, (4) feature extraction, and (5) classify defects. Then make a preliminary judgment on the type and position of the defect, the scanning camera 2 determines the scanning range according to the defect position, and the scanning camera 2 performs reciprocating detection or positioning detection at the new scanning position, and performs local enlarged detec...

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Abstract

The invention refers to a measuring method and the device for steel surface, especially measuring large area steel surface defect and the continuous small defects. The invention uses the panoramic camera and high resolution scanning camera, uses panoramic camera to detect the global and the steel breadth, then uses the movable scanning camera to scan and amplify the local area, thus it can detect the obvious defect.

Description

technical field [0001] The present invention relates to a strip steel surface inspection method and a device for implementing the method, especially for single large-area strip steel surface defect detection and continuous detection of small defects, not only suitable for cold-rolled strips with better working conditions Steel surface detection, and suitable for hot-rolled strip surface detection in harsh environments and strip surface detection in other environments. technical background [0002] The existing strip surface inspection system based on image pattern recognition has been widely used in major iron and steel enterprises in the world. This detection system uses a charge-coupled camera to photograph the surface of the strip for detection. In order to cover 100% of the detection range on the surface of the steel strip and achieve the required resolution, it is generally necessary to distribute multiple cameras along the width direction of the steel strip to simulta...

Claims

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Application Information

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IPC IPC(8): G01N21/86G01N21/88
Inventor 何永辉乔俊良陆丽华李红梅万国红蒋剑峰
Owner BAOSHAN IRON & STEEL CO LTD
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