Rotary kiln firing state recognition method based on flame image structure similarity

A technology of structural similarity and flame image, applied in image analysis, image data processing, instruments, etc., can solve the problems of unstable clinker quality index, long processing time, low production capacity, etc.

Inactive Publication Date: 2014-02-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, many scholars have done a lot of in-depth research on each module of digital image processing. Although the recognition method of using digital image processing technology to judge the burning state of flame images has the advantages of high recognition accuracy, diverse and mature algorithms, but This kind of method inevitably has the defects of high computational complexity, long processing time, and the inability to monitor in real time online. It has not fundamentally changed the mode of "manual fire inspection", and affects the safety and reliability of the rotary kiln control system. Cause a series of problems such as unstable clinker quality index, low production capacity and high cost

Method used

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  • Rotary kiln firing state recognition method based on flame image structure similarity
  • Rotary kiln firing state recognition method based on flame image structure similarity
  • Rotary kiln firing state recognition method based on flame image structure similarity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for identifying the firing state of an alumina rotary kiln based on the structural similarity of flame images. The specific steps of the rotary kiln firing state identification method are as follows: figure 1 Shown:

[0051] The first step, the standard flame image Q is calibrated by alumina rotary kiln operation experts, and the size of the standard flame image Q is 512×384×3. The standard flame image Q constitutes the standard flame image library L, and the standard flame image library L is divided into the normal flame image library LN and the abnormal flame image image library LA. The standard flame image Q is composed of the standard flame image Q; the standard flame image Q is filtered and grayscale transformed to obtain the standard flame grayscale image y; all the standard flame grayscale images y form the standard flame grayscale library F, and the standard flame grayscale library F is divided into It is the normal flame gray scale gallery FN and the...

Embodiment 2

[0084] A method for identifying the firing state of an alumina rotary kiln based on the structural similarity of flame images. The specific steps of the rotary kiln firing state identification method are as follows: figure 1 Shown:

[0085] The first step, the filtering described in this step is filtering with a 20-order Butterworth low-pass filter; the size of the standard flame gray image y is 512×384. All the other are the same as the first step of embodiment 1.

[0086] The second step is to obtain a picture such as Figure 4 The color flame image P to be tested is as shown, and the size of the flame image P to be tested is 512×384×3; the flame image P to be tested is filtered with a 20-order Butterworth low-pass filter and gray-scale transformed, and the following is obtained: Figure 5 The grayscale image x of the flame to be tested is 512×384 in size.

[0087] The third step, this step is the same as the third step of Embodiment 1 except that the 40 average structur...

Embodiment 3

[0116] A method for identifying the firing state of a cement rotary kiln based on the structural similarity of flame images. The specific steps of the rotary kiln firing state identification method are as follows: figure 1 Shown:

[0117] The first step, the standard flame image Q is calibrated by cement rotary kiln operation experts, and the size of the standard flame image Q is 352×288×3. The standard flame image Q constitutes the standard flame image library L, and the standard flame image library L is divided into the normal flame image library LN and the abnormal flame image image library LA. The standard flame image Q is composed of the standard flame image Q; the standard flame image Q is filtered and grayscale transformed to obtain the standard flame grayscale image y; all the standard flame grayscale images y form the standard flame grayscale library F, and the standard flame grayscale library F is divided into It is the normal flame gray scale gallery FN and the ab...

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Abstract

The invention relates to a rotary kiln firing state recognition method based on flame picture structure similarity. According to the technical scheme, the method includes the steps that a standard flame gray level image y, a normal flame gray level image storage FN and an abnormal flame gray level image storage FA are set; a to-be-monitored flame image P is obtained, and filtering and grey level transformation are carried out on the to-be-monitored flame image P to obtain a to-be-monitored flame gray level image x; average structural similarity coefficient calculation is carried out on the to-be-monitored flame gray level image x and all standard flame gray level images to obtain a+b MSSIM coefficients (x,y); the maximum value MAXssim of the MSSIM coefficients is selected, if the standard flame gray level image y corresponding to the maximum value MAXssim of the MSSIM coefficients belongs to the normal flame gray level image storage FN, the to-be-detected flame image P belongs to a normal state, and otherwise to-be-monitored flame image P belongs to an abnormal state. The method has the advantages of being high in precision, low in computation complexity, short in processing procedure and capable of achieving online real-time monitoring of flame state changes.

Description

technical field [0001] The invention belongs to the technical field of rotary kiln firing state recognition. In particular, it relates to a method for identifying the firing state of a rotary kiln based on the structural similarity of flame images. Background technique [0002] Rotary kiln is a thermal equipment used in calcination or roasting and other processing of various industrial raw materials. It is used for mechanical, physical or chemical treatment of input materials. It is widely used in building materials, chemical industry, metallurgy and other industries. Affected by the particularity of the structure of the rotary kiln and the complexity of the process, it is difficult to measure the quality indicators of the clinker obtained online, and it is also difficult to accurately identify the firing state of the clinker. In addition, the multi-variable strong coupling characteristics of the rotary kiln process and uncertain interference, etc. factors, the operation pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 柴利林彦君盛玉霞
Owner WUHAN UNIV OF SCI & TECH
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