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Automatic online detection method for defects on upper and lower surfaces during steel plate pretreatment process

An automatic detection and preprocessing technology, applied in image data processing, optical testing flaws/defects, measuring devices, etc., can solve problems such as unavoidable missed detection, low efficiency, and insecurity, and achieve work safety, improve production efficiency, Detect accurate effects

Inactive Publication Date: 2006-06-21
BOHAI SHIP HEAVY IND CO LTD
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Problems solved by technology

[0003] The traditional steel plate surface defect detection method is to visually inspect the steel plate after the steel plate has been derusted and sprayed with primer in the pretreatment line. After one side of the steel plate is inspected, the steel plate is turned over to inspect the other side. Safe, and missed inspection is inevitable, so that unqualified steel plates will be used on the hull structure, causing quality problems and rework

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  • Automatic online detection method for defects on upper and lower surfaces during steel plate pretreatment process
  • Automatic online detection method for defects on upper and lower surfaces during steel plate pretreatment process
  • Automatic online detection method for defects on upper and lower surfaces during steel plate pretreatment process

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Embodiment Construction

[0020] An online automatic detection method for upper and lower surface defects in the steel plate pretreatment process. This method uses high-speed imaging technology. According to the characteristics of the imaging color and gray level of defect points that are different from other normal points, the image chromaticity and gray level features are used. The identification technology identifies and classifies the defect points, and then inputs the images into the microcomputer for processing.

[0021] On-line automatic detection method for surface defects in steel plate pretreatment process, such as figure 1 , figure 2 shown. The detection system adopts a gantry structure. The gantry 1 is erected on the steel plate pretreatment line, and the steel plate 3 moves through the gantry 1 at a certain speed along the Y axis. The upper and lower beams of the gantry 1 are equipped with lighting facilities 4. The lighting facilities 4 mainly include a high-speed stroboscopic special ...

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Abstract

The invention discloses an on-line self-detecting method of surface defect in the ship formation steel predisposing course, which comprises the following steps: allocating the steel surface luminous equipment to form light field on two faces of on-line steel; setting several cases of independent imaging measuring device corresponding to each light field; proceeding real-time image of two faces of steel simultaneously when the steel moves along horizontal direction; disposing the image and marking the defect point; gathering the image grey scale and colority information separately through grey scale image information collector and colority image signal collector; analyzing and disposing the gathered grey scale and colority information through industrial computer software; adapting image grey scale character to identify and classify the defect point; starting the marking device to mark the defect point when the defect point is detected. The invention shortens the ship formation period greatly, which improves the ship body structure quality and detecting precision.

Description

(1) Technical field [0001] The invention relates to an automatic detection method for steel plate surface defects, in particular to an online automatic detection method for upper and lower surface defects in the steel plate pretreatment process. (2) Background technology [0002] A large number of steel plates are used in the shipbuilding process. First, the steel plates need to be pretreated. During the steel plate pretreatment process, after surface derusting and painting processes, the surface defects of the steel plates need to be detected before entering the cutting process. For defects Steel plates that exceed the standard need to be repaired or replaced, and steel plates that meet the standards can enter the next process for cutting. [0003] The traditional steel plate surface defect detection method is to visually inspect the steel plate after the steel plate has been derusted and sprayed with primer in the pretreatment line. After one side of the steel plate is ins...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/89G06K9/00
CPCG06T7/0004G01N21/89G01N2021/888G01N2021/8918G06T2207/30136
Inventor 熊木地郭静寰陈力韩仁通赵凤国
Owner BOHAI SHIP HEAVY IND CO LTD
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