High-resolution cigarette pore structure detection method and system

Abstract

The invention discloses a high-resolution cigarette pore structure detection method and system, and the method comprises the following steps: placing a cigarette sample in a constant-temperature and constant-humidity chamber, and installing the cigarette sample in a manner of being longitudinally vertical to the horizontal plane of the constant-temperature and constant-humidity chamber; detecting the pore structure of the cigarette sample in the constant-temperature and constant-humidity chamber by using a CT (Computed Tomography) instrument, and obtaining images of the cigarette sample at different angles of more than 180 degrees, wherein the resolution ratio of an X-ray source in the CT instrument to a rotating shaft of the cigarette sample is less than or equal to 1 mu m; and performing computer software analysis on the image, and calculating to obtain the porosity and the tobacco shred order rate. By controlling the cigarette detection form and the parameters of the CT instrument, the porosity measurement stability is improved.

Description

TECHNICAL FIELD

[0001] The patent belongs to the technical field of cigarette detection, and particularly relates to a high-resolution cigarette pore structure detection method and system. BACKGROUND

[0002] The porosity of a cigarette has an important influence on the generation and transmission of smoke during the combustion process. The porosity refers to the ratio of the total volume of small voids in a porous medium to the total volume of the porous medium, and is a dimensionless physical quantity. The porosity is related to the shape, structure and arrangement of the porous medium. The porosity is an important parameter affecting the fluid transmission performance in a cigarette and significantly affects the smoke transmission efficiency.

[0003] The porosity of a cigarette is generally indirectly determined by a nanometer silica filling method, but this method has some limitations, for example, the filling process needs to form a fluidization of an inert filler at a certain flow rate and gas carrying, which is difficult to control the stability, and causes certain influence on the structure of the cigarette itself, affecting the accuracy of the porosity determination.

[0004] Micro-CT (micro computed tomography) is the most advanced non-destructive 3D microscope, which is a non-destructive 3D imaging technology. The principle is the same as that of medical CT, and small size and high precision scanning can be performed. The internal microstructure of the sample can be clearly understood without damaging the sample. The biggest difference between it and ordinary clinical CT is that the resolution is extremely high, which can reach microns, so it has good "micro" effect. It is commonly used in the research fields of medicine, pharmacy, biology, archaeology, materials, electronics, geology, etc. However, when CT is used to determine the porosity structure of a cigarette, the porosity determination is unstable. SUMMARY

[0005] The purpose of the patent is to provide a high-resolution cigarette pore structure detection method and system, and to realize the purpose of improving the stability of porosity determination.

[0006] To solve the above technical problems, the patent adopts the following technical solutions:

[0007] A high-resolution cigarette pore structure detection method, comprising the following steps:

[0008] Step A: Place the cigarette sample in a constant temperature and humidity chamber, and install the cigarette sample in a vertical manner perpendicular to the horizontal plane of the constant temperature and humidity chamber;

[0009] Step B: Detect the pore structure of the cigarette sample in the constant temperature and humidity chamber by using a CT instrument, the resolution of the X-ray source in the CT instrument to the rotation axis of the cigarette sample is less than or equal to 1 micrometer, and the images of the cigarette sample at different angles of more than 180 degrees are obtained;

[0010] Step C: Analyze the image using computer software to calculate the porosity and tobacco shred order rate;

[0011] The formula for calculating the ordered rate of tobacco shreds is as follows:

[0012]

[0013] The formula for calculating porosity is as follows:

[0014] .

[0015] Furthermore, in step A, the cigarette samples are kept in a constant temperature and humidity chamber under stable environmental conditions for 20-40 minutes.

[0016] Furthermore, environmental factors include ambient temperature and humidity;

[0017] The ambient temperature of the constant temperature and humidity chamber is 24-26℃;

[0018] The temperature control accuracy of the constant temperature and humidity chamber is 0.1℃;

[0019] The humidity of the constant temperature and humidity chamber is 54-56%RH.

[0020] Furthermore, the cigarette samples were fixed using carbon fiber clamps.

[0021] Furthermore, in step B, the minimum effective pixel size of the CT scanner is 5-10 μm.

[0022] The CT scanner has a pixel count of ≥3072×2400.

[0023] Furthermore, when the X-ray source in the CT scanner is 30 mm away from the rotation axis of the cigarette sample, the resolution is ≤1 μm.

[0024] Furthermore, step B includes the following steps:

[0025] Step B1: Use a CT scanner to perform a search-type imaging of the cigarette sample in the constant temperature and humidity chamber with a large field of view resolution of 200-400 μm to obtain the first image;

[0026] Step B2: Use a CT scanner to perform a search-type imaging of the cigarette samples in the constant temperature and humidity chamber with a medium resolution of 50-150 μm to obtain a second image;

[0027] Step B3: Set the scanning area based on the first and second images, so that the cigarette is within the field of view, and perform high-resolution imaging at 20-60 μm to obtain images of the cigarette sample at different angles above 180°.

[0028] Furthermore, in step B3, when setting the scanning area for the first and second images, it is necessary to keep the cigarette sample within the field of view.

[0029] This patent further provides a system for detecting the pore structure of cigarettes using any of the above-mentioned high-resolution methods, including a carbon fiber clamp, a constant temperature and humidity chamber, and a CT scanner.

[0030] The cigarette sample was mounted in a carbon fiber clamp in a manner that was vertically perpendicular to the horizontal plane of the constant temperature and humidity chamber.

[0031] The CT scanner is used to test cigarette samples in a constant temperature and humidity chamber.

[0032] The CT scanner is connected to computer software to calculate and analyze the porosity and tobacco shred order.

[0033] Furthermore, the CT scanner is a Skyscan 2211 X-ray CT scanner.

[0034] Furthermore, the carbon fiber clamp has a triangular fixing bracket.

[0035] In this patent, the cigarette part generally refers to the part including the aerosol forming matrix, which generates an aerosol that can be directly inhaled into the user's lungs through the user's mouth by heating.

[0036] Preferably, the aerosol forming matrix is ​​a solid aerosol forming matrix. In some preferred embodiments, the solid aerosol forming matrix includes tobacco.

[0037] For example, aerosol forming materials can be formed from sheets of homogeneous tobacco.

[0038] Alternatively, the solid aerosol forming matrix can be placed on or embedded in a thermally stable carrier.

[0039] The carrier can take the form of fragments, strips, bars, or sheets.

[0040] Solid aerosol forming matrix can be arranged on the surface of a carrier in the form of, for example, sheets, foams, gels, or slurries. The solid aerosol forming matrix can be placed on the entire surface of the carrier, or alternatively, it can be arranged in a pattern to provide uneven fragrance delivery during use.

[0041] In this patent, sheet refers to a layered element having a width and length substantially greater than its thickness.

[0042] The aerosol forming matrix can be in the form of a plug, which includes an aerosol forming material defined by paper or other packaging material. When the aerosol forming matrix is ​​in the form of a plug, the entire plug comprising any packaging paper is considered to be the aerosol forming matrix. Preferably, the outer packaging paper is cigarette paper.

[0043] This patent provides a high-resolution method and system for detecting the pore structure of cigarettes, which improves the stability of porosity measurement by controlling the morphology of the cigarette and the parameters of the CT scanner.

[0044] When X-rays emitted from the X-ray source in a CT scanner pass through a sample, the different absorption rates of X-rays at different parts of the cigarette sample allow the X-rays to penetrate the sample and ultimately form an image on the X-ray detector, enabling imaging of the cigarette sample from different angles of 180° or more. The images obtained by this patent are then reconstructed using computer software, restoring them into 3D images that can be analyzed on a computer. Furthermore, it allows observation of information from various cross-sections within the cigarette sample, 2D and 3D analysis of the parts of interest in the sample, and the creation of intuitive 3D animations.

[0045] Compared with the prior art, this patent has the following advantages:

[0046] 1. A high-resolution X-ray CT scanner imported from Belgium was selected to determine the porosity and analyze the order rate of cigarettes. This method is a non-destructive method for measuring the internal structure of cigarettes. Compared with the filling method, no pressure changes the structure of the tobacco, resulting in more accurate test results.

[0047] 2. A special fixture for cigarettes is used, which can more comprehensively measure the internal structure of cigarettes. It is made of low-scattering carbon fiber material, thus avoiding artifacts caused by metal supports.

[0048] 3. The temperature and humidity of the test are controlled. The temperature is controlled at 25±1℃ with a control accuracy of ±0.1℃; the humidity is controlled at 55±1%RH. Within this stable temperature and humidity range, the morphology of the tobacco shreds in the cigarette can be guaranteed, ensuring the accuracy and stability of the porosity measurement. Attached Figure Description

[0049] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0050] Figure 1 This is a schematic diagram showing the fit between the cigarette sample and the carbon fiber clamp in this patent.

[0051] Figure 2 This is a 3D image of the cigarette sample in Example 1 of this patent;

[0052] Figure 3 This is a two-dimensional tomographic image of the cigarette sample in Example 1 of this patent;

[0053] Figure 4 This is a 3D image of the cigarette sample in Example 2 of this patent;

[0054] Figure 5 This is a two-dimensional tomographic image of the cigarette sample in Example 2 of this patent.

[0055] The reference numerals in the attached figures are explained as follows:

[0056] Cigarette portion: 10

[0057] Carbon fiber clamps: 20 Detailed Implementation

[0058] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0059] This specification also uses several compound terms to describe devices, components, equipment, etc. that include more than one function, or to assign additional functions to a corresponding device, component, equipment, etc. Those skilled in the art will understand that such compound terms can be implemented by a single or multiple devices, components, equipment, etc., as long as they are reasonable under the interpretation rules of this patent terminology.

[0060] It should be noted that in this specification, similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and interpreted in subsequent figures. In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined as having the following meanings:

[0061] The terms “comprising” or “having” have the same meaning as “containing”, and also include other forms of the term, such as the gerund and singular forms in English, meaning including but not limited to, and not intended to exclude, for example, other elements, components, integers or steps.

[0062] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0063] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0064] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0065] All references cited in this application are incorporated herein by way of quotation, to the extent that they do not contradict the disclosure herein. It will be apparent to those skilled in the art that products (apparatus, components, devices, compounds, compositions, materials, etc.) and methods (processes, steps, conditions, parameters, equipment, and test methods, equipment, etc.) not specifically described herein can be applied to the implementation of the inventions fully disclosed herein without the need for excessive experimentation. This patent is intended to cover all functional equivalents known in the art of the methods, apparatus, apparatus components, materials, processes, and techniques specifically described herein. All cited references include:

[0066] The following publications are included: Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to this patent application date), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to this patent application date), published by Wiley; Machinery's Handbook (32nd edition and other editions prior to this patent application date), published by IndustrialPress Inc.; Mechanical Design Handbook (6th edition and other editions prior to this patent application date), edited by Cheng Daxian, published by Chemical Industry Press; and Modern Mechanical Design Handbook (6th edition and other editions prior to this patent application date), edited by Wen Bangchun, published by Machinery Industry Press.

[0067] This patent will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. While specific structures and arrangements are discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will recognize that other structures and arrangements can be used without departing from the spirit and scope of this patent. It will be clear to those skilled in the art that this patent can also be used in a variety of other applications.

[0068] Example 1

[0069] This embodiment provides a method for detecting and analyzing the porosity structure of cigarettes, the steps of which are as follows:

[0070] 1. Select a brand of cigarettes, cut off the filter, and measure the length of the tobacco shreds in the cigarette sample. The sample is 15.0 mm long and 7.2 mm in diameter. (Example: ...) Figure 1 As shown, the cigarette sample is placed in a carbon fiber clamp and then placed together in a constant temperature and humidity chamber, so that the cigarette sample stands vertically, i.e., the cigarette sample.

[0071] 2. Environmental control: Start the constant temperature and humidity chamber to maintain an ambient temperature of 25℃ and a relative humidity of 55% during the measurement process. Keep the cigarette samples in the constant temperature and humidity environment for 30 minutes.

[0072] 3. Scan

[0073] The high-resolution X-ray CT scanner Skyscan2211 imported from Belgium was used to scan the cigarette sample in the constant temperature and humidity chamber. The technical parameters were adjusted so that the resolution was ≤1μm when the X-ray source was 30mm away from the rotation axis of the cigarette sample, the minimum effective pixel size was 9um, and the number of pixels was ≥3072×2400.

[0074] The field of view is focused on a local area of ​​the sample, and imaging at different resolutions is performed, with automatic switching between different detectors. The specific steps are as follows: First, a large field-of-view search imaging with a resolution of 300 μm is performed on the cigarette sample, followed by a medium resolution search imaging at 100 μm. Based on the scanning area set by the two imaging data, the cigarette is placed in the exact center of the field of view. Then, a long-term high-resolution imaging at 40 μm is performed on the set area of ​​the cigarette sample, obtaining images of the cigarette sample at different angles of more than 180°.

[0075] 4. Computer software analysis

[0076] The acquired images were imported into XLab reconstruction software for rapid 3D reconstruction. Through image matching, image smoothing, and image enhancement, a 3D image of the cigarette sample was reconstructed, generating a RAW file. Image matching ensures accurate alignment of images at different levels during reconstruction, eliminating potential displacement or rotation errors to guarantee the accuracy of the 3D image reconstruction. Image smoothing removes noise or irregularities using smoothing algorithms, making the image clearer. Image enhancement improves image contrast or brightness, making details more prominent and easier to observe.

[0077] Import the RAW file into Avizo software and select the region of interest (ROI). The ROI is the area containing the carbon fiber fixture.

[0078] A two-dimensional tomographic image is selected from the ROI region. By observing its grayscale histogram and image features, a grayscale threshold is selected to distinguish the cigarette sample part and the carbon fiber clamp part in the ROI region. This grayscale threshold is then applied to the entire three-dimensional data volume to separate the cigarette sample part and the transparent plastic box part in the three-dimensional data volume. The internal pores of the cigarette sample are displayed in the form of a 3D image using Avizo software. A complete and independent three-dimensional model of the tobacco sheet is established through three-dimensional reconstruction.

[0079] The established 3D model of the tobacco sheet was saved to the computer in TIF format. The 3D data of the tobacco sheet was mapped to a 3D coordinate system in the form of a 3D matrix according to the slicing order. Model fitting was performed using functions in MATLAB for calculating object properties in 3D images to fit the shape of the tobacco sheet and output its feature vector. Fiber orientation vectors were extracted, and the proportion of tobacco strands parallel to the tobacco stem direction was calculated, i.e., the tobacco strand ordering rate.

[0080] The data processing function of Avizo software was used to quantitatively calculate the relevant parameters of the internal pore structure of the tobacco leaf under test. The two-dimensional tomographic images of each layer of the tobacco sample were imported into Avizo. The threshold segmentation tool of Avizo was used to perform binarization processing on the images to accurately extract the pore parts. The ratio of the total pore volume of the slice to the total volume of the tobacco part was calculated to obtain the porosity of the slice.

[0081] The cross-section of a cigarette is as follows Figures 2-3 As shown in Table 1, the software analysis results are presented.

[0082] Table 1: Pore Analysis Results of Cigarette Samples

[0083]

[0084] Example 2

[0085] This embodiment provides a method for detecting and analyzing the porosity structure of cigarettes, the steps of which are as follows:

[0086] 1. Select a brand of cigarettes, cut off the filter, and measure the length of the tobacco shreds in the cigarette sample. The sample is 15.2 mm long and 7.5 mm in diameter. (Example: ...) Figure 1 As shown, the cigarette sample was placed in a carbon fiber clamp and then placed together in a constant temperature and humidity chamber, so that the cigarette sample stood upright.

[0087] 2. Environmental control: Start the constant temperature and humidity chamber to maintain an ambient temperature of 25℃ and a relative humidity of 55% during the measurement process. Keep the cigarette samples in the constant temperature and humidity environment for 30 minutes.

[0088] 3. Scan

[0089] The high-resolution X-ray CT scanner Skyscan2211 imported from Belgium was used to scan the cigarette sample in the constant temperature and humidity chamber. The technical parameters were adjusted so that the resolution was ≤1μm when the X-ray source was 30mm away from the rotation axis of the cigarette sample, the minimum effective pixel size was 9um, and the number of pixels was ≥3072×2400.

[0090] The field of view is focused on a local area of ​​the sample, and imaging at different resolutions is performed, with automatic switching between different detectors. The specific steps are as follows: First, a large field-of-view search imaging with a resolution of 350 μm is performed on the cigarette sample, followed by a medium resolution search imaging at 120 μm. Based on the scanning area set by the two imaging data, the cigarette is placed in the exact center of the field of view. Then, a long-term high-resolution imaging at 30 μm is performed on the set area of ​​the cigarette sample, obtaining images of the cigarette sample at different angles of more than 180°.

[0091] 4. Computer software analysis

[0092] The acquired images were imported into XLab reconstruction software for rapid 3D reconstruction. Through image matching, image smoothing, and image enhancement, a 3D image of the cigarette sample was reconstructed, generating a RAW file. Image matching ensures accurate alignment of images at different levels during reconstruction, eliminating potential displacement or rotation errors to guarantee the accuracy of the 3D image reconstruction. Image smoothing removes noise or irregularities using smoothing algorithms, making the image clearer. Image enhancement improves image contrast or brightness, making details more prominent and easier to observe.

[0093] Import the RAW file into Avizo software and select the region of interest (ROI). The ROI is the area containing the carbon fiber fixture.

[0094] A two-dimensional tomographic image is selected from the ROI region. By observing its grayscale histogram and image features, a grayscale threshold is selected to distinguish the cigarette sample part and the carbon fiber clamp part in the ROI region. This grayscale threshold is then applied to the entire three-dimensional data volume to separate the cigarette sample part and the transparent plastic box part in the three-dimensional data volume. The internal pores of the cigarette sample are displayed in the form of a 3D image using Avizo software. A complete and independent three-dimensional model of the tobacco sheet is established through three-dimensional reconstruction.

[0095] The established 3D model of the tobacco sheet was saved to the computer in TIF format. The 3D data of the tobacco sheet was mapped to a 3D coordinate system in the form of a 3D matrix according to the slicing order. Model fitting was performed using functions in MATLAB for calculating object properties in 3D images to fit the shape of the tobacco sheet and output its feature vector. Fiber orientation vectors were extracted, and the proportion of tobacco strands parallel to the tobacco stem direction was calculated, i.e., the tobacco strand ordering rate.

[0096] The data processing function of Avizo software was used to quantitatively calculate the relevant parameters of the internal pore structure of the tobacco leaf under test. The two-dimensional tomographic images of each layer of the tobacco sample were imported into Avizo. The threshold segmentation tool of Avizo was used to perform binarization processing on the images to accurately extract the pore parts. The ratio of the total pore volume of the slice to the total volume of the tobacco part was calculated to obtain the porosity of the slice.

[0097] The cross-section of a cigarette is as follows Figures 4-5 As shown in Table 2, the software analysis results are presented.

[0098] Table 2: Pore Analysis Results of Cigarette Samples

[0099]

[0100] The terms and expressions used in this specification are for illustrative purposes and not for limitation. Their use is not intended to exclude any equivalents of the features or portions thereof shown, but rather to facilitate the understanding that various modifications may be possible within the scope of this patent claim. Therefore, it should be understood that while this patent has been specifically disclosed through preferred embodiments, exemplary embodiments, and optional features, variations or modifications of the concepts disclosed herein may be adopted by those skilled in the art, and such variations and modifications are therefore considered to be within the scope of this patent as defined by the appended claims. The specific embodiments given in this specification are examples of useful embodiments of this patent, and it will be apparent to those skilled in the art that this patent can be implemented using many variations of the devices, device components, and method steps disclosed herein.

[0101] The foregoing description of specific embodiments fully discloses the general features of this patent, enabling others to easily modify and / or adapt such embodiments for various applications by applying knowledge within the scope of the art, without excessive experimentation or deviation from the general concept of this patent. Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0102] Furthermore, the scope of this patent should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A high-resolution method for detecting the pore structure of a cigarette stick, characterized in that, Includes the following steps: Step A: Place the cigarette sample in a constant temperature and humidity chamber, with the cigarette sample mounted vertically perpendicular to the horizontal plane of the constant temperature and humidity chamber; Step B: Use a CT scanner to detect the pore structure of the cigarette sample in the constant temperature and humidity chamber. The resolution of the X-ray source in the CT scanner from the rotation axis of the cigarette sample is ≤1μm, and images of the cigarette sample at different angles above 180° are obtained. Step C: Analyze the image using computer software to calculate the porosity and tobacco shred order rate; The formula for calculating the ordered rate of the tobacco shreds is as follows: ; The porosity calculation formula is as follows: 。 2. The high-resolution cigarette pore structure detection method according to claim 1, characterized in that, In step A, the cigarette sample is kept in a stable environment in the constant temperature and humidity chamber for 20-40 minutes.

3. The high-resolution cigarette pore structure detection method according to claim 2, characterized in that, The environmental factors include ambient temperature and humidity; The ambient temperature of the constant temperature and humidity chamber is 24-26℃; The temperature control accuracy of the constant temperature and humidity chamber is 0.1℃; The humidity of the constant temperature and humidity chamber is 54-56%RH.

4. The high-resolution cigarette pore structure detection method according to claim 2, characterized in that, The cigarette sample was fixed using a carbon fiber clamp.

5. The high-resolution cigarette pore structure detection method according to claim 1, characterized in that, When the X-ray source in the CT scanner is 30 mm away from the rotation axis of the cigarette sample, the resolution is ≤1 μm. Step B includes the following steps: Step B1: Use the CT scanner to perform a wide-field-of-view search imaging of the cigarette sample in the constant temperature and humidity chamber, wherein the wide-field-of-view resolution is 200-400 μm, to obtain the first image; Step B2: Use the CT scanner to perform medium-resolution search imaging on the cigarette sample in the constant temperature and humidity chamber, where the medium resolution is 50-150 μm, to obtain a second image; Step B3: Set the scanning area based on the first image and the second image, and perform high-resolution imaging. The high-resolution imaging is 20-60 μm, and obtain images of the cigarette sample at different angles above 180°.

6. The high-resolution cigarette pore structure detection method according to claim 5, characterized in that, In step B3, when setting the scanning area for the first and second images, it is necessary to keep the cigarette sample within the field of view.

7. The high-resolution cigarette pore structure detection method according to claim 1, characterized in that, In step B, the minimum effective pixel size of the CT scanner is 5-10 μm. The number of pixels in the CT scanner is ≥3072×2400.

8. A system for detecting the high-resolution pore structure of a cigarette stick according to any one of claims 1-7, characterized in that, This includes carbon fiber clamps, a constant temperature and humidity chamber, and a CT scanner; The cigarette sample was mounted in the carbon fiber clamp in a manner that was perpendicular to the horizontal plane of the constant temperature and humidity chamber. The CT scanner is used to test the cigarette samples in the constant temperature and humidity chamber. The CT scanner is connected to computer software to calculate and analyze the porosity and the orderliness of the tobacco shreds.

9. The system according to claim 8, characterized in that, The CT scanner is a Skyscan 2211 X-ray CT scanner.

10. The system according to claim 8, characterized in that, The carbon fiber clamp has a triangular fixing frame.

Images