White edge detecting method for hot galvanizing alloying plate

A technology of alloying plates and detection methods, which is applied in the direction of testing metals, measuring devices, and material inspection products, and can solve problems such as setting and adjustment of alloying power, long transition time, and inability to trace white edges.

Inactive Publication Date: 2008-10-29
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different experience of each operator, there are differences between individuals, resulting in different product quality
And because the setting and adjustment of the alloying power stays on manual control, the adjustment lags behind and the transition time is long, which affects the improvement of the product yield and product quality of the unit
At the same time, the white edge of the produced roll cannot be traced

Method used

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  • White edge detecting method for hot galvanizing alloying plate
  • White edge detecting method for hot galvanizing alloying plate
  • White edge detecting method for hot galvanizing alloying plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] 1. Get the image ( Image 6 ), to get the original image pixel value curve ( Figure 7 )

[0094] 2. Calculate the histogram H(D) of the image

[0095] H ( D ) = lim ΔD → 0 A ( D ) - A ( D + ΔD ) ΔD = - d dD A ( D ) - - - ( 1 )

[0096] The histogram describes the number of pixels with a certain gray value in the image. In formula (1), D represents the gray level, and A(D) repre...

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Abstract

The invention relates to a digital image process technology and a method used for detecting haloing of a hot dipped galvanized alloying plate; the digital image process technology and the method are characterized in that two horizontal justification cameras aim at two edges of left and right of a band steel respectively and carry out shooting for the band steel; two image collecting cards are respectively connected with the two cameras by cables; an industrial control computer collects the digital image by the two image collecting cards, carries out processing for the image and calculates the haloing parameter, the calculated haloing parameter is compared with the ideal haloing parameter and the current power setting value is regulated properly; the regulated power setting value is transmitted to a programmable logic controller (PLC) and the power value of a power heater is reset by the programmable logic controller (PLC); the digital image process technology and the method can accurately measure the occurrence of the haloing, response to the change of the haloing in time and shorten the transitional length, thus reducing the quantity of waste and ungraded products and improving the yield and the quality of the products.

Description

technical field [0001] The invention relates to a digital image processing technology, in particular to a method for detecting white edges of a hot-dip galvanized alloyed plate. Background technique [0002] The white edge of the hot-dip galvanized alloyed sheet is an important indicator reflecting the alloying effect of the hot-dip galvanized alloyed sheet. The operator usually adjusts the alloying power according to the white edge situation, so as to achieve the purpose of micro white edge control. In the past, the operator relied on the naked eye to observe the width of the white edge, and adjusted the alloying power based on experience, so as to achieve the purpose of micro-white edge control. However, due to the different experience of each operator, there are differences between individuals, resulting in different product quality. And because the setting and adjustment of the alloying power remain on manual control, the adjustment lags behind and the transition time ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20G01N21/84G06T5/40G06T7/60
Inventor 顾华中俞鸿毅朱耀江叶晓松黄佩杰
Owner BAOSHAN IRON & STEEL CO LTD
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