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Method for detecting axial pore distribution of cigarette

A technology of axial porosity and detection method, applied in the direction of suspension and porous material analysis, measuring device, analysis material, etc.

Pending Publication Date: 2021-11-26
CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is still a lack of effective methods to evaluate the distribution of axial porosity in cigarettes

Method used

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  • Method for detecting axial pore distribution of cigarette
  • Method for detecting axial pore distribution of cigarette
  • Method for detecting axial pore distribution of cigarette

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Experimental program
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Effect test

Embodiment 1

[0042] The detection method of cigarette axial pore distribution of the present embodiment, flow chart is as follows figure 1 shown, including the following steps:

[0043] (1) Perform tomographic scanning on the cigarette section of the cigarette sample to obtain a tomographic grayscale image

[0044] use as figure 2 The shown tomography system performs tomography, and the tomography system consists of a micro-focus X-ray source, a digital flat-panel detector, and a high-precision turntable.

[0045] When working, use the emission source and the highly sensitive detector to scan the cross-section of the sample to be tested at different positions, and obtain the grayscale image of the sample without loss. The grayscale value in the image corresponds to the material density in the sample. The components and densities of the ray attenuation are different, corresponding to different gray values ​​on the reconstructed image.

[0046] In order to eliminate the influence of the ...

Embodiment 2

[0081] The method for detecting the axial pore distribution of cigarettes in this embodiment, the main steps are described as follows, and other steps not described are the same as in Embodiment 1.

[0082] Step (1): γ-rays are used as the ray source, and the resolution is set to 30 microns. The cigarette sample is laid down (flat scanning) to collect axial tomographic grayscale images. The tomographic scanning system and the embodiment 1 can use the same platform. The collected grayscale image needs to cut out the filter segment image.

[0083] Step (2): Draw a grayscale histogram, the air peak is on the far left of the histogram, and the gray value corresponding to the trough between the leftmost peak and the second left peak is selected as the segmentation threshold K.

[0084] Step (5): Divide the 3D reconstruction model into 2 segments, 4 segments, 8 segments, 12 segments, ..., 128 segments on average (the arithmetic difference method is adopted after 4 segments). Count ...

Embodiment 3

[0091] The difference between the detection method of the axial pore distribution of the cigarette in this embodiment and that of Embodiment 1 will be described as follows, and other steps not described are the same as those of Embodiment 1.

[0092] In step (2), a grayscale histogram is drawn, the air peak is on the far left of the histogram, and the gray value corresponding to the trough between the leftmost peak and the second left peak is selected as the segmentation threshold K.

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Abstract

The invention belongs to the field of detection of tobaccos and tobacco products, and particularly relates to a method for detecting axial pore distribution of cigarettes. According to the method for detecting the axial pore distribution of the cigarette, the cigarette sample is subjected to tomography, a three-dimensional model is reconstructed, the porosity is solved in a segmented mode, the number N of segments enabling the porosity variance to be stable is determined, and the variance and the change condition of the porosity distribution of the cigarette sample in the axial direction are solved with N as the standard. Further, the axial porosity distribution condition of the cigarette can be analyzed and evaluated. The axial porosity distribution data of the cigarette obtained by the method can guide the production process, provide data support for improving the filling uniformity of the cigarette, provide reference for analyzing the puff-by-puff draw resistance of the cigarette and the stability of the sensory quality, and can achieve nondestructive quantitative analysis compared with a traditional density method.

Description

technical field [0001] The invention belongs to the field of detection of tobacco and tobacco products, and in particular relates to a method for detecting the axial pore distribution of cigarettes. Background technique [0002] Filling uniformity of shredded tobacco in cigarettes is a key parameter affecting its quality stability and sensory quality. Pores are the voids in the middle of fillers such as shredded tobacco and stems of cigarettes, which are filled with air. Porosity refers to the percentage of voids in the volume of cigarettes. Porosity can be used to characterize the filling performance of cigarettes and the structure of cigarettes. The more uniform the distribution of porosity in cigarettes The better the filling uniformity and the higher the density consistency, the more consistent the sensory quality will be from mouth to mouth. [0003] The porosity of cigarettes is different from the porosity in the fields of medicine and materials science. The porosity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 徐羽鹏董浩周明珠李晓辉杨进禹舰邢军王锦平周德成
Owner CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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