Height histogram segmentation-based method for identifying depth defect of refractory brick

A technology of height histogram and identification method, which is applied in the field of identification of deep defects of refractory bricks, can solve the problems of affecting the service life of refractory bricks, prone to misjudgment, and large subjective influence, so as to avoid osmotic corrosion, prolong service life, and achieve good results. The effect of execution efficiency

Inactive Publication Date: 2018-09-28
SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

As time goes by, the penetrating corrosion phenomenon will become more and more severe, which will eventually affect the service life of refractory bricks and affect the quality and efficiency of iron and steel smelting
At present, many defects are judged by workers relying on experience, which is greatly influenced by subjectivity, and it is impossible to establish a unified evaluation standard
In addition, in the process of mass production, this process not only consumes a lot of labor costs, but also repetitive and monotonous measurement and observation work can easily cause personnel fatigue and misjudgment. Serious economic loss, even seriously affecting the production of steel

Method used

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  • Height histogram segmentation-based method for identifying depth defect of refractory brick
  • Height histogram segmentation-based method for identifying depth defect of refractory brick
  • Height histogram segmentation-based method for identifying depth defect of refractory brick

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Embodiment 1

[0054] The identification method of depth defect of refractory brick based on height histogram segmentation comprises the following steps:

[0055] Step 1. Filter and denoise the original color image of refractory bricks collected by the sensor to obtain the denoised image; in the denoised image, segment the refractory brick area to obtain the grayscale image of the refractory brick, such as figure 1 shown;

[0056] Step 2. Use the least squares method to perform plane fitting on the point cloud of the refractory brick image to obtain the zero plane, and obtain the size parameters (height and width) of the original refractory brick image, and generate a corresponding The reference plane image of ;

[0057] Step 3. Make a difference between the original refractory brick image and the reference plane image to obtain the tilt-corrected point cloud data map, as shown in figure 2 shown;

[0058]Step 4. Filter and segment the height histogram of the tilt-corrected point cloud to...

Embodiment 2

[0088] In this embodiment, the geometric dimension of the refractory brick is measured on the basis of the threshold segmentation of the refractory brick image, and the methods for obtaining the refractory brick image, filtering and denoising processing and segmenting the refractory brick area are the same as in Embodiment 1.

[0089] A method for measuring the geometric dimensions of refractory bricks, comprising the following steps:

[0090] Step 1: Filter and denoise the original refractory brick color image to obtain the denoised image;

[0091] Step 2: In the denoised image, segment the refractory brick area to obtain the refractory brick image, such as figure 1 shown;

[0092] Step 3: Carry out morphological processing on the refractory brick image, make the edge of the refractory brick image transition smoothly, and remove the isolated point noise at the edge of the refractory brick image, and obtain the corrected refractory brick image;

[0093] Step 4: Use the Canny...

Embodiment 3

[0127] In this embodiment, on the basis of the threshold segmentation of the refractory brick image, the surface scratch recognition of the refractory brick is carried out. The acquisition of the refractory brick image, the filtering and noise reduction processing and the method of segmenting the refractory brick area are the same as in Embodiment 1.

[0128] A method for identifying scratches on the surface of refractory bricks based on frequency domain filtering enhancement, including the following steps:

[0129] Step 1: Filter and denoise the original color image of refractory bricks collected by the sensor to obtain a denoised image; in the denoised image, segment the area of ​​refractory bricks to obtain a grayscale image of refractory bricks, such as figure 1 shown;

[0130] Step 2: convert the grayscale image of refractory bricks into a color image of refractory bricks, perform channel decomposition on the color image of refractory bricks, separate the images of R, G, ...

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Abstract

The invention discloses a height histogram segmentation-based method for identifying the depth defect of a refractory brick. The method comprises the steps of obtaining a segmented refractory brick grayscale image; performing plane fitting on the image point cloud of the refractory brick by using a least square method to obtain a zero plane, obtaining the size parameter of the original image of the refractory brick, and generating a corresponding reference plane image according to the size parameter and the zero plane of the original image of the refractory brick; performing difference betweenthe original image of the refractory brick and the reference plane image, and obtaining a point cloud data graph after the inclination correction process; carrying out filtering segmentation on the height histogram of the point cloud after the inclination correction process to obtain the point cloud information with a preset depth; marking communicated areas according to the point cloud information of the preset depth through adopting the double scanning method, calculating the area of the communicated areas at each depth, and obtaining defect data. According to the invention, the identification method for identifying the depth defect of the refractory brick is provided.

Description

technical field [0001] The invention relates to a method for identifying depth defects of refractory bricks based on height histogram segmentation. Background technique [0002] Refractory brick is a shaped refractory material fired with refractory clay or other refractory raw materials. It is mainly used for building smelting furnaces or ladles, and can withstand high temperatures of 1580°C-1770°C. [0003] During the production process of refractory bricks, some deep defects will be caused due to the loss of molds: pits, pockmarked surfaces and missing corners and edges. As time goes by, the penetrating corrosion phenomenon will become more and more severe, which will eventually affect the service life of refractory bricks and affect the quality and efficiency of iron and steel smelting. At present, many defects are judged by workers relying on experience, which is greatly influenced by subjectivity, and it is impossible to establish a unified evaluation standard. In add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00G06T7/11G06T7/187
CPCG06T5/002G06T7/0008G06T2207/20028G06T2207/30132G06T7/11G06T7/187
Inventor 曹衍龙张远松杨将新王敬孙安顺董献瑞
Owner SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
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