White edge detecting method for hot galvanizing alloying plate

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...

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

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