Image pickup device for diffusion state of cigarette smoke

Abstract

The utility model discloses a cigarette smoke diffusion state's image acquisition device, including shell and image acquisition device, the shell inside is provided with the smoke diffusion cavity, is equipped with the assembly hole with smoke diffusion cavity intercommunication on the shell, the image acquisition device sealed solid installation in assembly hole, the shell left and right two ends symmetry is provided with first connecting port and second connecting port, first connecting port with second connecting port all with smoke diffusion cavity intercommunication, first connecting port is used for with smoking machine intercommunication, and second connecting port is used for with cigarette intercommunication. Through smoke diffusion cavity and smoking machine, cigarette intercommunication, accurate simulation smoke diffusion environment, avoid outside interference, guarantee smoke image clear and stable. Again through setting up in the shell and with smoke diffusion cavity intercommunication's image acquisition device, the diffusion state of cigarette smoke is shot, and reliable data support is provided for subsequent smoke diffusion state (float, suspend, overflow etc.) quantitative evaluation.

Description

Technical Field

[0001] This utility model relates to the field of cigarette smoke characteristic evaluation technology, specifically, to an image acquisition device for capturing the smoke diffusion state during cigarette combustion and smoking. Background Technology

[0002] The diffusion state of cigarette smoke is a core sensory indicator characterizing the style of tobacco leaves. Its typical states, such as "drifting," "suspended," and "sinking," are closely related to the tobacco-producing region, variety, and processing technology. For example, tobacco smoke from southwestern tobacco-producing regions like Yunnan and Sichuan is predominantly drifting, while smoke from central tobacco-producing regions like Chongqing and Guizhou is typically suspended, and smoke from the Yellow River and Huai River regions like Henan and Hunan is predominantly sinking. Currently, the evaluation of smoke diffusion state mainly relies on manual smoking assessment, which involves subjective visual judgment by assessors. This method has limitations such as being time-consuming and labor-intensive, having poor reproducibility, and being difficult to quantify.

[0003] To address the subjectivity of sensory evaluation, Chinese utility model patent CN118746526A provides a method and system for evaluating the agglomeration properties of cigarette smoke. The method includes: inhaling multiple puffs of cigarette smoke into a nasal cavity model; acquiring the smoke composition of the first puff of smoke from the multiple puffs, and obtaining a particle size score for the agglomeration properties of the cigarette based on the diameter of the smoke particles and the proportion of particles of each diameter in the smoke composition; acquiring multiple smoke images of non-first puffs, and obtaining a visual score for the agglomeration properties of the cigarette based on the morphology and agglomeration characteristics of the smoke in the multiple smoke images, where the morphology and agglomeration characteristics include the size, shape, texture, and changes over time; when the difference between the visual score and the particle size score is less than a predetermined value, the visual score is used as the final score; otherwise, the particle size score is used as the final score. This utility model simulates the movement and diffusion characteristics of smoke in the human upper respiratory tract, integrates data from visual algorithms and particle size analysis, and achieves smoke characteristic evaluation through digital means.

[0004] However, the aforementioned patents only address the single indicator of smoke agglomeration, and their image acquisition methods cannot fully record the dynamic diffusion process of smoke in three-dimensional space, such as the spatial distribution trajectory, diffusion range, and morphological evolution of the smoke, making it difficult to meet the needs of multi-dimensional evaluation of smoke diffusion status. Therefore, there is an urgent need for an image acquisition device that can accurately capture the dynamic process of cigarette smoke diffusion, providing reliable raw image data for the objective quantitative analysis of smoke diffusion status, thereby compensating for the shortcomings of existing technologies in characterizing the spatial diffusion characteristics of smoke. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an image acquisition device for the diffusion state of cigarette smoke. By constructing a controllable smoke diffusion space and a multi-view image acquisition structure, it enables accurate recording of the smoke diffusion traces and state, laying the foundation for subsequent objective quantitative characterization using visual algorithms.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides an image capturing device for the diffusion state of cigarette smoke, including a housing and an image acquisition device; the housing is provided with a smoke diffusion cavity inside, and the housing is provided with an assembly hole communicating with the smoke diffusion cavity, and the image acquisition device is sealed and fixed in the assembly hole;

[0008] The outer casing is symmetrically provided with a first connection port and a second connection port at its left and right ends, and both the first connection port and the second connection port are connected to the flue gas diffusion cavity.

[0009] The first connection port is used to connect to a smoking machine, and the second connection port is used to connect to a cigarette.

[0010] A first connection port and a second connection port are symmetrically arranged on the left and right sides of the smoke diffusion cavity. These ports connect the smoking machine and the cigarette respectively, forming a smoke flow path. The smoke diffusion cavity serves as a smoke flow space, simulating the cigarette smoking process. An assembly hole communicating with the smoke diffusion cavity is provided on the outer shell, and an image acquisition device is sealed and fixed within this hole to capture images of the smoke diffusion process within the cavity.

[0011] As a preferred embodiment of this invention, both the outer shell and the flue gas diffusion cavity are cubic structures.

[0012] The cubic structure, with its symmetry, ensures consistent diffusion resistance along three dimensions after cigarette smoke enters the diffusion chamber. This results in a stable concentration gradient and uniformly distributed smoke field within the chamber, providing a "bias-free simulation environment." The cubic structure of the outer shell enhances operational practicality; openings of different sizes can be made on all six sides of the cube, facilitating the standardization of image acquisition devices while maintaining cost-effectiveness.

[0013] As a preferred embodiment of this utility model, the number of assembly holes is one, and the axis of the assembly hole is spatially perpendicular to the axes of the first connection port and the second connection port.

[0014] By installing an image acquisition device in an assembly hole, a one-dimensional image of the cigarette smoke diffusion state is captured, initially capturing the unidirectional characteristics of smoke diffusion, meeting basic observation requirements, with the simplest structure and lowest cost, making it suitable for preliminary screening experiments.

[0015] As a preferred embodiment of this utility model, there are two assembly holes, which are respectively disposed on different surfaces of the outer casing. The axis of the first assembly hole is perpendicular to the axis of the first connection port and the axis of the second connection port, and the axis of the second assembly hole is perpendicular to the axis of the first assembly hole.

[0016] By installing image acquisition devices in two assembly holes, a two-dimensional graphic of the diffusion state of cigarette smoke is obtained, presenting the diffusion pattern of smoke in a plane, realizing planar observation, which can be used to analyze the diffusion rate and uniformity of smoke in a specific cross section;

[0017] As a preferred embodiment of this utility model, the number of assembly holes is three, and the three assembly holes are respectively arranged on different surfaces of the outer shell, and the axes of any two assembly holes are spatially perpendicular.

[0018] By installing image acquisition devices in three assembly holes, three-dimensional graphics of the cigarette smoke diffusion state can be obtained, completely reproducing the diffusion process of the smoke in three-dimensional space, including core features such as diffusion trajectory and concentration distribution, which is suitable for high-precision experiments.

[0019] By setting any two assembly hole axes to be spatially perpendicular, it is ensured that the image acquisition devices in different assembly holes can capture smoke from independent perspectives without overlap, avoiding image information duplication caused by overlapping perspectives, and ensuring that each set of acquired data can supplement new dimensional information, providing a precise spatial reference for subsequent two-dimensional or three-dimensional graphic stitching.

[0020] As a preferred embodiment of this utility model, both the first connection port and the second connection port are tubular structures, and the tubular structures are threadedly connected to the flexible hose.

[0021] As a preferred embodiment of this invention, the tubular structure incorporates a spring-loaded one-way valve.

[0022] As a preferred embodiment of this utility model, a spring-loaded one-way valve is used for threaded sealing connection between the tubular structure and the flexible hose.

[0023] The image capturing device is sealed to the smoking machine via a flexible tube, and then sealed to the cigarette via a flexible tube and a rubber tube, ensuring the airtightness of the smoke channel formed by the smoke diffusion cavity, the smoking machine, and the cigarette.

[0024] A spring-loaded one-way valve airtight device is adopted to prevent backflow of flue gas through its one-way conduction characteristic, thus avoiding flue gas leakage and interference with the diffusion state.

[0025] As a preferred embodiment of this utility model, the assembly hole is cylindrical in shape, and the image acquisition device is a cylindrical camera whose shape is adapted to the assembly hole. The cylindrical camera has its own light source, which is used to provide the lighting conditions required for shooting the smoke diffusion state.

[0026] The cylindrical camera with its own light source can adapt to the lighting requirements for shooting under different smoke concentrations, ensuring clear imaging of the smoke diffusion outline.

[0027] As a preferred embodiment of this utility model, the outer shell and the first and second connecting ports are made of metal, plastic or glass.

[0028] Metal, plastic, or glass materials are resistant to flue gas corrosion, high temperature resistance, and shape stability, thus preventing the material from interfering with flue gas diffusion.

[0029] This utility model has substantial features and advancements compared to existing technologies, specifically:

[0030] (1) Through the smoke diffusion chamber inside the outer shell, combined with the first and second symmetrical connection ports, it is connected to the smoking machine and the cigarette respectively, forming a complete and sealed smoke flow path, which can accurately simulate the smoke diffusion process when actually smoking cigarettes, and avoid interference from external airflow, impurities and other factors on the smoke diffusion state.

[0031] (2) Design 1, 2 or 3 assembly holes according to specific usage requirements, and set the axis of the assembly holes according to the principle of spatial perpendicularity. Through the image acquisition device installed in the assembly hole, one-dimensional, two-dimensional or three-dimensional image acquisition of the flue gas diffusion state can be realized to ensure clear imaging of the flue gas diffusion outline.

[0032] (3) By accurately simulating the environment and acquiring clear and stable images, it can accurately record the traces and states of flue gas diffusion (such as drifting, suspension, settling, etc.), effectively overcoming the subjectivity and randomness of traditional evaluation of flue gas diffusion state by relying on human senses, and improving the scientificity and consistency of the evaluation results. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the appearance of the image capturing device for the diffusion state of cigarette smoke in Embodiment 2 of this utility model;

[0034] Figure 2 This is a cross-sectional schematic diagram of the image capturing device for the diffusion state of cigarette smoke in Embodiment 2 of this utility model;

[0035] Figure 3 This is a cross-sectional schematic diagram of the two-dimensional image capturing device for the diffusion state of cigarette smoke in Embodiment 3 of this utility model;

[0036] Figure 4 This is a schematic diagram of the appearance of the three-dimensional image capturing device for the diffusion state of cigarette smoke in Embodiment 4 of this utility model;

[0037] Figure 5 This is a schematic diagram of the smoke diffusion state captured by the image capturing device in Embodiment 2 of this utility model;

[0038] Figure 6 This is a schematic diagram of the smoke diffusion state captured by the image capturing device in Embodiment 3 of this utility model.

[0039] In the diagram: 1. Smoke diffusion cavity; 2. First camera; 3. First connection port; 4. Second connection port; 5. Second camera; 6. Third camera; 7. Smoke diffusion cavity. Detailed Implementation

[0040] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0041] Example 1

[0042] This embodiment discloses an image capturing device for the diffusion state of cigarette smoke, including a housing 1 and an image acquisition device; a smoke diffusion cavity 7 is provided inside the housing, and an assembly hole communicating with the smoke diffusion cavity 7 is provided on the housing 1, and the image acquisition device is sealed and fixed in the assembly hole; a first connection port 3 and a second connection port 4 are symmetrically provided at the left and right ends of the housing 1, and both the first connection port 3 and the second connection port 4 are communicating with the smoke diffusion cavity 7; the first connection port 3 is used to communicate with a smoking machine, and the second connection port 4 is used to communicate with a cigarette.

[0043] The smoke produced by the burning of cigarettes is drawn into the smoke diffusion chamber 7 by the smoking machine. During this process, the image acquisition device can capture and record the diffusion state of the smoke in the smoke diffusion chamber 7.

[0044] Example 2

[0045] like Figure 1 , Figure 2 As shown, this embodiment discloses a specific implementation of an image capturing device for the diffusion state of cigarette smoke.

[0046] Specifically, the outer shell 1 is cube-shaped, with an internal base size of 10mm × 10mm, a height of 50mm, and a volume of 5ml. The outer shell 1 is made of a material that can fix its shape and is not easily deformed, such as metal, plastic, or glass. In this embodiment, transparent glass is preferred, which can maintain structural stability and facilitate external observation of the smoke diffusion inside the smoke diffusion chamber 7.

[0047] Specifically, the outer casing 1 has a mounting hole for mounting the first camera 2, and the axis of the mounting hole is spatially perpendicular to the axes of the first connection port 3 and the second connection port 4. The inner diameter of the mounting hole matches the diameter of the circular portion of the first camera 2, and the first camera 2 is sealed and fixedly mounted within the mounting hole. The first camera 2 is cylindrical, with a circular portion diameter of 8mm and a cylindrical height of 40mm. The technical parameters of the first camera 2 are a resolution of 640×480 and a frame rate of 30 frames per second, capable of clearly capturing the dynamic process of smoke diffusion. The first camera 2 has its own light source, which can provide the illumination conditions required for shooting in the smoke diffusion state, ensuring that clear images can still be obtained when the light inside the cavity is insufficient. The material of the first camera 2 is generally a non-deformable material, mostly plastic, and there are no special requirements for this device. The first camera 2 is electrically connected to a power supply.

[0048] Specifically, the outer casing 1 is provided with a tubular first connection port 3. The inner diameter of the tubular structure of the first connection port 3 is adapted to a threaded connection with a flexible hose, and the end of the flexible hose away from the first connection port 3 is sealed and connected to the smoke extraction machine, thereby enabling communication between the smoke extraction machine and the smoke diffusion chamber 7. The material of the first connection port 3 can be metal, plastic, or glass, etc.

[0049] Specifically, the outer casing 1 is provided with a tubular second connection port 4. The inner diameter of the tubular structure of the second connection port 4 is adapted to the threaded connection of a flexible hose. The end of the flexible hose away from the second connection port 4 is sealed and connected to a rubber tube, and the end of the rubber tube away from the flexible hose is sealed and sleeved with the cigarette, thereby realizing the communication between the cigarette and the smoke diffusion cavity 7. The material of the second connection port 4 can be metal, plastic, or glass, etc.

[0050] Specifically, the first connection port 3 and the second connection port 4 are equipped with spring-loaded one-way valves, and the first connection port 3, the second connection port 4, and the hose are connected by a threaded seal with the spring-loaded one-way valve. The spring-loaded one-way valve serves as an airtight device, ensuring both the sealing of the connection and the one-way flow characteristic to prevent backflow of flue gas.

[0051] Figure 5 As shown, taking the smoking process of a cigarette as an example, by setting the smoking machine parameters: smoking frequency 6 times / 60 seconds, each smoking time 2 seconds, and smoking volume 35mL, the smoking machine is sealed and connected to the first connection port 3 to continuously smoke the cigarette puff by puff. At the same time, the first camera 2 is activated to record the dynamic diffusion state of the smoke in the diffusion chamber during each puff.

[0052] For each puff, 5 images are captured at 2-second / frame intervals within the first 10 seconds after the puffing action is started; after 10 seconds, images are continuously captured at 1-second / frame intervals until the smoke diffuses and stabilizes in the cavity. A total of 46 valid images are captured for each puff.

[0053] The selected images were arranged. Dark areas represent the smoke produced by burning cigarettes (the visual difference is due to the scattering of light by the smoke), while light areas represent the transparent background inside the cavity (smoke-free areas). Grayscale analysis of multiple sets of images revealed that at the instant of each puff (i.e., within 0-2 seconds of the smoking machine starting to pump), the smoke concentration inside the cavity rapidly reaches its peak; after the puffing action stops, the smoke gradually dilutes with diffusion and continuous pumping by the smoking machine, and the concentration decreases linearly; furthermore, from the first to the sixth puff, the peak smoke concentration of each puff shows a gradually increasing trend.

[0054] Example 3

[0055] like Figure 3 As shown, this embodiment discloses a specific implementation of a two-dimensional image capturing device for the diffusion state of cigarette smoke.

[0056] Specifically, the outer shell 1 is cubic in shape, with an internal base size of 25mm × 25mm, a height of 50mm, and a volume of 31.25ml. The outer shell 1 is made of a material that can be fixed in shape and is not easily deformed, such as metal, plastic, or glass. In this embodiment, transparent glass is preferred, which can ensure structural stability and facilitate external observation of the overall situation of smoke diffusion inside the smoke diffusion cavity 7.

[0057] Specifically, the outer casing 1 has two mounting holes for mounting the first camera 2 and the second camera 5. These two mounting holes are located on different surfaces of the outer casing, communicating with the flue gas diffusion cavity 7, and their axes are perpendicular. Specifically, the axis of the first mounting hole is perpendicular to the axes of the first connection port 3 and the second connection port 4, and the axis of the second mounting hole is perpendicular to the axis of the first mounting hole. The first camera 2 and the second camera 5 are respectively sealed and fixed within the mounting holes.

[0058] Specifically, the first camera 2 and the second camera 5 are cylindrical in shape, with a circular diameter of 8mm and a height of 40mm. The technical parameters of the first camera 2 and the second camera 5 are a resolution of 640×480 and a frame rate of 30 frames per second, capable of clearly capturing the dynamic process of smoke diffusion. The first camera 2 and the second camera 5 have their own light sources, providing the necessary illumination for capturing images during smoke diffusion, ensuring clear images even when there is insufficient light inside the cavity. The first camera 2 and the second camera 5 are generally made of non-deformable materials, mostly plastic; there are no special requirements for this device. The first camera 2 and the second camera 5 can be powered by centralized power supply, independent power supply, or PoE power supply.

[0059] Specifically, the outer casing 1 is provided with a tubular first connection port 3. The inner diameter of the tubular structure of the first connection port 3 is adapted to a threaded connection with a flexible hose, and the end of the flexible hose away from the first connection port 3 is sealed and connected to the smoke extraction machine, thereby enabling communication between the smoke extraction machine and the smoke diffusion chamber 7. The material of the first connection port 3 can be metal, plastic, or glass, etc.

[0060] Specifically, the outer casing 1 is provided with a tubular second connection port 4. The inner diameter of the tubular structure of the second connection port 4 is adapted to the threaded connection of a flexible hose. The end of the flexible hose away from the second connection port 4 is sealed and connected to a rubber tube, and the end of the rubber tube away from the flexible hose is sealed and sleeved with the cigarette, thereby realizing the communication between the cigarette and the smoke diffusion cavity 7. The material of the second connection port 4 can be metal, plastic, or glass, etc.

[0061] Specifically, the first connection port 3 and the second connection port 4 are equipped with spring-loaded one-way valves, and the first connection port 3, the second connection port 4, and the hose are connected by a threaded seal with the spring-loaded one-way valve. The spring-loaded one-way valve serves as an airtight device, ensuring both the sealing of the connection and the one-way flow characteristic to prevent backflow of flue gas.

[0062] like Figure 6 As shown, taking the smoking process of a cigarette as an example, by setting the smoking machine parameters: a smoking frequency of 6 times / 60 seconds, a smoking duration of 2 seconds per session, and a smoking capacity of 35mL, the smoking machine is sealed and connected to the first connection port 3 to continuously smoke the cigarette puff by puff. At the same time, the first camera 2 and the second camera 5 are activated to record the dynamic diffusion state of the smoke in the diffusion chamber during each puff, realizing the capture and acquisition of two-dimensional graphics of the diffusion state of the smoke inside the chamber.

[0063] For each puff, 5 images were captured at 2-second / frame intervals within the first 10 seconds after the inhalation. After 10 seconds, images were continuously captured at 1-second / frame intervals until the smoke from that puff diffused and stabilized within the cavity. A total of 46 valid images were captured per puff. In all images, dark areas represent smoke produced by cigarette combustion (the visual difference is due to the scattering of light by the smoke), while light areas represent the transparent background inside the cavity (smoke-free areas).

[0064] Analysis of grayscale values ​​of multiple sets of two-dimensional images revealed that at the moment of each puff (i.e., within 0-2 seconds when the smoking machine starts to pump air), the concentration of smoke in the cavity rapidly reaches its peak. After the pumping action stops, the smoke gradually dilutes with diffusion and continuous pumping by the smoking machine, and the concentration decreases linearly. Furthermore, from the first to the sixth puff, the peak concentration of smoke in each puff shows a gradual increasing trend.

[0065] Example 4

[0066] like Figure 4As shown in the figure, this embodiment discloses a specific implementation of a three-dimensional image acquisition device for the diffusion state of cigarette smoke.

[0067] Specifically, the outer shell 1 is cubic in shape, with an internal base size of 25mm × 25mm, a height of 50mm, and a volume of 31.25ml. The outer shell 1 is made of a material that can be fixed in shape and is not easily deformed, such as metal, plastic, or glass. In this embodiment, transparent glass is preferred, which can ensure structural stability and facilitate external observation of the overall situation of smoke diffusion inside the smoke diffusion cavity 7.

[0068] Specifically, the outer casing 1 has three mounting holes for mounting the first camera 2, the second camera 5, and the third camera 6. The three mounting holes are respectively located on different surfaces of the outer casing, and the axes of any two mounting holes are perpendicular to each other. The first camera 2, the second camera 5, and the third camera 6 are connected to the flue gas diffusion cavity 7 and are respectively sealed and fixed in the mounting holes.

[0069] Specifically, the first camera 2, the second camera 5, and the third camera 6 are cylindrical in shape, with a circular diameter of 8mm and a height of 40mm. The technical parameters of the first camera 2, the second camera 5, and the third camera 6 are a resolution of 640×480 and a frame rate of 30 frames per second, capable of clearly capturing the dynamic process of smoke diffusion. The first camera 2, the second camera 5, and the third camera 6 are equipped with their own light sources, providing the necessary illumination for capturing the smoke diffusion process and ensuring clear images even when there is insufficient light inside the cavity. The first camera 2, the second camera 5, and the third camera 6 are generally made of non-deformable materials, mostly plastic; there are no special requirements for this device. The first camera 2, the second camera 5, and the third camera 6 can be powered by centralized power supply, independent power supply, or PoE power supply. The first camera 2, the second camera 5, and the third camera 6 are used to capture and acquire three-dimensional images of the smoke diffusion process inside the cavity.

[0070] Specifically, the outer casing 1 is provided with a tubular first connection port 3. The inner diameter of the tubular structure of the first connection port 3 is adapted to a threaded connection with a flexible hose, and the end of the flexible hose away from the first connection port 3 is sealed and connected to the smoke extraction machine, thereby enabling communication between the smoke extraction machine and the smoke diffusion chamber 7. The material of the first connection port 3 can be metal, plastic, or glass, etc.

[0071] Specifically, the outer casing 1 is provided with a tubular second connection port 4. The inner diameter of the tubular structure of the second connection port 4 is adapted to the threaded connection of a flexible hose. The end of the flexible hose away from the second connection port 4 is sealed and connected to a rubber tube, and the end of the rubber tube away from the flexible hose is sealed and sleeved with the cigarette, thereby realizing the communication between the cigarette and the smoke diffusion cavity 7. The material of the second connection port 4 can be metal, plastic, or glass, etc.

[0072] Specifically, the first connection port 3 and the second connection port 4 are equipped with spring-loaded one-way valves, and the first connection port 3, the second connection port 4, and the hose are connected by a threaded seal with the spring-loaded one-way valve. The spring-loaded one-way valve serves as an airtight device, ensuring both the sealing of the connection and the one-way flow characteristic to prevent backflow of flue gas.

[0073] Specifically, the first connection port 3 and the second connection port 4 are symmetrically arranged on the left and right sides of the outer shell 1, and both are connected to the interior of the smoke diffusion chamber 7, so that the smoke generated by the combustion of cigarettes can be drawn into the smoke diffusion chamber 7 by the smoking machine. During this process, the first camera 2, the second camera 5 and the third camera 6 simultaneously capture and record the smoke diffusion state from different perspectives, realizing the three-dimensional image capture of the smoke diffusion behavior, and providing richer image data for a comprehensive analysis of the smoke diffusion characteristics of cigarettes.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An image capturing device for the diffusion state of cigarette smoke, characterized in that, It includes a housing and an image acquisition device; the housing has a flue gas diffusion chamber inside, and the housing has an assembly hole that communicates with the flue gas diffusion chamber, and the image acquisition device is sealed and fixed in the assembly hole; The outer casing is symmetrically provided with a first connection port and a second connection port at its left and right ends, and both the first connection port and the second connection port are connected to the flue gas diffusion cavity. The first connection port is used to connect to a smoking machine, and the second connection port is used to connect to a cigarette.

2. The image capturing device for the diffusion state of cigarette smoke according to claim 1, characterized in that: Both the outer shell and the flue gas diffusion cavity are cubic structures.

3. The image capturing device for the diffusion state of cigarette smoke according to claim 2, characterized in that: The number of assembly holes is one, and the axis of the assembly hole is spatially perpendicular to the axes of the first connection port and the second connection port.

4. The image capturing device for the diffusion state of cigarette smoke according to claim 2, characterized in that: There are two assembly holes, which are respectively located on different surfaces of the housing. The axis of the first assembly hole is perpendicular to the axis of the first connection port and the axis of the second connection port, and the axis of the second assembly hole is perpendicular to the axis of the first assembly hole.

5. The image capturing device for the diffusion state of cigarette smoke according to claim 2, characterized in that: The number of assembly holes is three, and the three assembly holes are respectively located on different surfaces of the outer shell, and the axes of any two assembly holes are spatially perpendicular.

6. The image capturing device for the diffusion state of cigarette smoke according to any one of claims 1-5, characterized in that: Both the first connection port and the second connection port are tubular structures, and the tubular structures are threadedly connected to the flexible hose.

7. The image capturing device for cigarette smoke diffusion state according to claim 6, characterized in that: The tubular structure has a built-in spring-loaded one-way valve.

8. The image capturing device for cigarette smoke diffusion state according to claim 7, characterized in that: A spring-loaded check valve is used to connect the tubular structure and the hose in a threaded seal.

9. The image capturing device for the diffusion state of cigarette smoke according to any one of claims 1-5, characterized in that: The assembly hole is cylindrical in shape, and the image acquisition device is a cylindrical camera whose shape is adapted to the assembly hole. The cylindrical camera has its own light source, which is used to provide the lighting conditions required for shooting the smoke diffusion state.

10. The image capturing device for the diffusion state of cigarette smoke according to any one of claims 1-5, characterized in that: The outer shell and the first and second connection ports are made of metal, plastic or glass.

Images