Method and device for measuring expansion rate of tobacco shreds

Abstract

The invention discloses a tobacco shred expansion rate measuring method and device, and the method comprises the steps: taking a first tobacco shred with a first weight before expansion, and dispersing the first tobacco shred to a state in which the first tobacco shred does not shield each other; collecting a first image of the dispersed first tobacco shreds, and calculating a first area of the tobacco shreds before expansion per unit weight according to the first image; taking expanded second tobacco shreds with a second weight, and dispersing the second tobacco shreds to a state that the second tobacco shreds are not mutually shielded; acquiring a second image of the dispersed second tobacco shreds, and calculating a second area of the expanded tobacco shreds according to the second image; according to the method, after the cut tobaccos are dispersed, the area of the cut tobaccos per unit weight before and after expansion is obtained through the image recognition technology, the expansion rate is calculated from the dimension of the area, the influence of human factors is avoided, and meanwhile the measurement accuracy, reliability and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of cigarettes, and more specifically, to a method and device for measuring the expansion rate of shredded tobacco. Background Art

[0002] In the production process of tobacco products, the tobacco expansion rate is a key indicator for evaluating tobacco quality, which has an important impact on the filling performance, combustion properties, mixing uniformity and overall economic efficiency of cigarettes. The gaps formed by the evaporation of water in the cell wall of tobacco during the drying process are crucial to improving the filling power and combustion performance of cigarettes. Therefore, accurate and rapid measurement of tobacco expansion rate plays an important role in improving the overall quality of tobacco products and the economic benefits of enterprises.

[0003] Traditional tobacco expansion rate measurement methods mainly rely on manual operation, which is complex and time-consuming, and is greatly affected by human factors, such as subjective judgment and fatigue of the operator, which may lead to errors and instability in the measurement results. In addition, although the traditional tobacco width measurement technology simplifies the measurement process to a certain extent, it also faces the problems of low accuracy and low efficiency, and cannot meet the needs of the modern tobacco industry for high-precision and high-efficiency measurement. Summary of the invention

[0004] The present application provides a method and device for measuring the expansion rate of shredded tobacco. After the shredded tobacco is dispersed, the area of ​​the shredded tobacco per unit weight before and after expansion is obtained through image recognition technology, and the expansion rate is calculated from the dimension of area, thereby avoiding the influence of human factors and improving the accuracy, reliability and efficiency of the measurement.

[0005] The present application provides a method for measuring the expansion rate of cut tobacco, comprising:

[0006] Taking a first weight of first shredded tobacco before expansion, and dispersing the first shredded tobacco until they are not blocked from each other;

[0007] collecting a first image of the first tobacco shreds after dispersion, and calculating a first area of ​​the tobacco shreds before expansion per unit weight according to the first image;

[0008] taking a second weight of expanded second shredded tobacco, and distributing the second shredded tobacco to a state where they are not blocked from each other;

[0009] collecting a second image of the dispersed second shredded tobacco, and calculating a second area of ​​the expanded shredded tobacco according to the second image;

[0010] The expansion rate of tobacco is calculated according to the following formula:

[0011]

[0012] Preferably, calculating the first area of ​​the tobacco shreds before expansion per unit weight according to the first image specifically includes:

[0013] Performing image processing on the first image to obtain a third area of ​​all tobacco shreds in the first image;

[0014] The quotient obtained by dividing the third area by the first weight is taken as the first area per unit weight of the tobacco shreds before expansion.

[0015] Preferably, the tobacco shreds are dispersed by means of a flexible vibrating disc.

[0016] The present application also provides a tobacco shred expansion rate measuring device, comprising an image processing module, a display module, a tobacco shred dispersion component, and an image collector arranged above the tobacco shred dispersion component;

[0017] The image processing module is connected to the image collector by signal, and the image processing module is connected to the display module by signal;

[0018] The image processing module is used to calculate the area of ​​the tobacco cut per unit weight according to the image of the tobacco cut, and to calculate the expansion rate according to the area of ​​the tobacco cut before and after expansion per unit weight.

[0019] Preferably, the tobacco shreds dispersing assembly comprises a material receiving box and a vibration mechanism arranged below the material receiving box.

[0020] Preferably, the vibration mechanism is a flexible vibration disk.

[0021] Preferably, the vibration source of the flexible vibration disk is an ultrasonic vibrator.

[0022] Preferably, the image collector is slidably arranged on the column via a support arm, and the column is fixed on the mounting base plate.

[0023] Preferably, a vertical first threaded hole is provided on the column, the screw rod is threadedly connected to the first threaded hole, the upper end of the screw rod protrudes from the first threaded hole, and an adjusting hand wheel is fixed thereon;

[0024] A vertical second threaded hole is provided at the first end of the support arm, the second threaded hole is threadedly connected to the screw rod, and the first end of the support arm is located below the first threaded hole.

[0025] Preferably, the tobacco expansion rate measuring device further comprises a controller and a shooting angle adjustment mechanism of the image collector, the shooting angle adjustment mechanism is arranged at the second end of the support arm, and the controller is connected to the actuator signal of the shooting angle adjustment mechanism.

[0026] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0028] Figure 1 A flow chart of the expansion rate measurement method provided in this application;

[0029] Figure 2 A three-dimensional diagram of the expansion rate measuring device provided in this application;

[0030] Figure 3 A front view of the expansion rate measuring device provided in this application;

[0031] Figure 4 A front view of the tobacco dispersing assembly and image acquisition module provided in this application;

[0032] Figure 5 for Figure 4 Right view of . DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0037] The present application provides a method and device for measuring the expansion rate of shredded tobacco. After the shredded tobacco is dispersed, the area of ​​the shredded tobacco per unit weight before and after expansion is obtained through image recognition technology, and the expansion rate is calculated from the dimension of area, thereby avoiding the influence of human factors and improving the accuracy, reliability and efficiency of the measurement.

[0038] like Figure 1 As shown, the method for measuring the expansion rate of shredded tobacco provided in the present application includes:

[0039] S110: taking first tobacco shreds of a first weight before expansion, and dispersing the first tobacco shreds to a state where they are not blocked from each other, so as to provide good conditions for image acquisition.

[0040] As an embodiment, the tobacco shreds are dispersed by a flexible vibrating disk. For details, please refer to the following description of the expansion rate measuring device.

[0041] Preferably, during the process of dispersing the tobacco, the vibration mode of the flexible vibration disk is changed. The coupling effect of multiple vibration modes can further optimize the movement path of the tobacco, ensuring that the tobacco can be evenly and stably distributed in the vibration disk, and each tobacco particle can be clearly captured by the image collector.

[0042] S120: collecting a first image of the first tobacco shreds after dispersion, and calculating a first area per unit weight of the tobacco shreds before expansion according to the first image.

[0043] As an embodiment, calculating the first area of ​​the tobacco shreds before expansion per unit weight according to the first image specifically includes:

[0044] S1201: Perform image processing on the first image to obtain a third area of ​​all tobacco shreds in the first image.

[0045] As an embodiment, image processing includes steps such as image segmentation, denoising, contrast enhancement, edge detection, etc., to extract the outline and size information of each tobacco strand, calculate the area of ​​each tobacco strand, and add up the areas of all tobacco strands to obtain the area of ​​all tobacco strands.

[0046] S1202: Divide the third area by the first weight to obtain a quotient as the first area of ​​the tobacco shreds before expansion per unit weight.

[0047] S130: taking the expanded second shredded tobacco of a second weight, and dispersing the second shredded tobacco until they are not blocked from each other.

[0048] S140: Collect a second image of the second tobacco shreds after dispersion, and calculate a second area of ​​the expanded tobacco shreds according to the second image. Please refer to S120 for the calculation method of the second area.

[0049] S150: Calculate the expansion rate of the tobacco according to the following formula:

[0050]

[0051] The present application also includes displaying the calculated expansion rate through a display module, which is convenient for operators to view and record. At the same time, the measurement results can also be output to a printer or data storage device to achieve data preservation and sharing.

[0052] It should be noted that the prior art calculates the expansion rate by measuring the volume of tobacco shreds before and after expansion. However, it is difficult to measure the volume of tobacco shreds and the accuracy of the measurement cannot be ensured.

[0053] During the shredding process, the width and thickness of the tobacco are preset dimensions. During the expansion of the tobacco, the thickness of the tobacco changes very little and can be ignored. Therefore, the present application calculates the expansion rate by calculating the area of ​​the tobacco before and after expansion. This calculation method can accurately reflect the size change of the tobacco during the expansion process. Compared with measuring the volume, the area measurement of the tobacco is relatively easy and has relatively high accuracy. In addition, the present application automatically calculates the expansion rate, which greatly improves the efficiency of the measurement.

[0054] Based on the above, the present application also provides a device for measuring the expansion rate of shredded tobacco. Figure 2-3 As shown, the expansion rate measuring device includes an image processing module, a display module 400, a tobacco shred dispersion component 200 and an image acquisition module.

[0055] The image processing module is connected to the image collector 300 of the image acquisition module by signal, and the image processing module is connected to the display module 400 by signal. The image processing module is used to calculate the area of ​​the tobacco per unit weight based on the image of the tobacco, and to calculate the expansion rate based on the area of ​​the tobacco before and after expansion per unit weight.

[0056] As an example, Figure 4-5 As shown, the tobacco shreds dispersing assembly 200 comprises a material receiving box 201 and a vibration mechanism disposed below the material receiving box 201. The material receiving box 201 is used to load the tobacco shreds to be dispersed.

[0057] As an example, Figure 4-5 As shown, the vibration mechanism is a flexible vibration plate, which includes a flexible thin plate and a chassis 202. The flexible thin plate is arranged on the top surface of the chassis 202, and the material receiving box 201 is placed on the flexible thin plate.

[0058] The flexible sheet is the core component of the flexible vibration plate, which is made of a composite material with a certain elasticity. The flexible sheet has good vibration transmission performance and can generate complex bending vibrations when subjected to external excitation.

[0059] Several vibration sources are arranged in the chassis 202 to generate vibration energy. The vibration source of the flexible vibration plate generates vibration energy through rapid reciprocating motion. The vibration source is usually installed at the bottom of the flexible thin plate and transmits the vibration energy to the thin plate through a connecting piece.

[0060] The chassis 202 is also provided with a control system for receiving external instructions and adjusting the excitation signal (such as frequency, phase and amplitude) of the vibration source. Figure 5 202 is used to connect the control system with external devices (such as PLC, computer, etc.). The lower part of the chassis 202 is a base 203, and the base 203 is designed with a shock-absorbing foot pad or a shock-absorbing structure to reduce the impact of vibration on the surrounding environment.

[0061] As an embodiment, the vibration source of the flexible vibration disk is a voice coil motor, which has fast response speed and high control accuracy.

[0062] When the voice coil motor is driven by an external power source, the coil inside the motor is acted upon by the Lorentz force in the magnetic field, resulting in rapid reciprocating motion, which is transmitted to the flexible sheet through the connector. As the main carrier of vibration, the flexible sheet begins to generate complex bending vibrations within its plane after receiving the vibration energy from the voice coil motor.

[0063] By adjusting the frequency, phase and amplitude of the excitation signal of the voice coil motor through the control system, the vibration mode of the flexible thin plate can be precisely controlled. Different vibration modes will cause different movement trajectories of the tobacco on the vibration disk, thereby achieving effective dispersion of the tobacco. The vibration of the flexible thin plate is not just a single mode vibration, but a coupling effect of multiple modes. This coupling effect can further optimize the movement path of the tobacco, ensuring that the tobacco can be evenly and stably distributed in the vibration disk, and each tobacco particle can be clearly captured by the image collector.

[0064] As another embodiment, the vibration source of the flexible vibration disk is an ultrasonic vibrator, which uses the vibration energy of ultrasound to help the tobacco to be dispersed more evenly and finely.

[0065] The specific process of tobacco dispersion includes:

[0066] Initial accumulation: Before vibration begins, the tobacco shreds may be present in the receiving box 201 in an accumulated or overlapping manner.

[0067] Vibration excitation: As the vibration source starts to work, the flexible sheet vibrates and transmits vibration energy to the tobacco.

[0068] Tobacco movement: Affected by the vibration, the tobacco begins to move inside the vibrating plate. The coupling of different vibration modes allows the tobacco to move along a complex path, thus avoiding accumulation and overlap.

[0069] Uniform distribution: Under the appropriate vibration mode, the tobacco is gradually dispersed to different areas of the vibration plate to form a uniform distribution.

[0070] Preferably, the tobacco shred dispersion assembly 200 further includes an airflow dispersion assembly to disperse the tobacco shred sample to achieve a better dispersion effect.

[0071] like Figure 2-5 As shown, the image acquisition module includes an image collector 300 and a supporting structure of the image collector 300. The image collector 300 is arranged above the tobacco dispersing assembly 200 and is a high-resolution, high-frame-rate industrial digital camera that captures high-definition images of tobacco through precise focus and exposure control.

[0072] As an embodiment, the image collector 300 is slidably arranged on the column 301 through the support arm 304, and the column 301 is fixed on the mounting base plate 105. A vertical first threaded hole is provided on the column 301, and the screw rod 303 is threadedly connected to the first threaded hole. The upper end of the screw rod 303 protrudes from the first threaded hole and is fixed with an adjustment hand wheel 302. A vertical second threaded hole is provided at the first end of the support arm 304, and the second threaded hole is threadedly connected to the screw rod 303, and the first end of the support arm 304 is located below the first threaded hole. By operating the adjustment hand wheel 302, the support arm 304 can be driven to move up and down along the column 301 to adjust the height of the image collector 300 to ensure that the quality of the captured image is optimal.

[0073] Preferably, the image acquisition module further comprises a light source system, which is arranged around the outside of the flexible sheet. When the tobacco is dispersed, the light source is turned on to provide stable and uniform lighting conditions for the image acquisition device, thereby ensuring the clarity of the image acquisition.

[0074] Preferably, the expansion rate measuring device further comprises a controller and a shooting angle adjustment mechanism of the image collector 300, the shooting angle adjustment mechanism is arranged at the second end of the support arm 304, and the controller is connected to the actuator signal of the shooting angle adjustment mechanism. The shooting angle adjustment mechanism enables the image collector 300 to capture images from different angles, thereby increasing the flexibility and comprehensiveness of the acquisition.

[0075] Preferably, if Figure 1 and 2 As shown, the expansion rate measuring device also includes a box 100, which provides support and protection for the image processing module, the display module 400, the tobacco dispersion assembly 200 and the image acquisition module. The box 100 has safety protection doors on multiple sides to prevent operators from accidentally contacting the inside of the device. A mounting base plate 105 is fixed in the middle of the box 100, the display module 400 is fixed on the top surface of the mounting base plate 105, and the display module 400 and the image acquisition module are arranged in a first chamber 101 above the mounting base plate 105. The image processing module is fixed in a second chamber 102 below the mounting base plate 105.

[0076] Preferably, universal wheels 103 and supporting feet 104 are provided on the bottom surface of the box 100 .

[0077] The expansion rate measuring device of the present application has strong adaptability and versatility, can adapt to tobacco of different specifications and expansion states, and meet diverse production needs.

[0078] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A method for measuring the expansion rate of cut tobacco, characterized in that: include: Taking a first weight of first shredded tobacco before expansion, and dispersing the first shredded tobacco to a state where they are not blocked from each other; collecting a first image of the first tobacco shreds after dispersion, and calculating a first area of ​​the tobacco shreds before expansion per unit weight according to the first image; taking a second weight of expanded second shredded tobacco, and dispersing the second shredded tobacco until they are not blocked from each other; collecting a second image of the dispersed second shredded tobacco, and calculating a second area of ​​the expanded shredded tobacco according to the second image; The expansion rate of tobacco is calculated according to the following formula:

2. The method for measuring the expansion rate of shredded tobacco according to claim 1, characterized in that: Calculating a first area of ​​the tobacco shreds before expansion per unit weight according to the first image specifically includes: performing image processing on the first image to obtain a third area of ​​all tobacco shreds in the first image; The quotient obtained by dividing the third area by the first weight is taken as the first area of ​​the tobacco shreds before expansion per unit weight.

3. The method for measuring the expansion rate of shredded tobacco according to claim 1, characterized in that: The tobacco is dispersed by a flexible vibrating disc.

4. A device for measuring the expansion rate of cut tobacco, characterized in that: It includes an image processing module, a display module, a tobacco shred dispersing component, and an image collector arranged above the tobacco shred dispersing component; The image processing module is connected to the image collector by signal, and the image processing module is connected to the display module by signal; The image processing module is used to calculate the area of ​​the tobacco shreds per unit weight based on the image of the tobacco shreds, and to calculate the expansion rate based on the area of ​​the tobacco shreds before and after expansion per unit weight.

5. The device for measuring the expansion rate of shredded tobacco according to claim 4, characterized in that: The shredded tobacco dispersing assembly comprises a material receiving box and a vibration mechanism arranged below the material receiving box.

6. The device for measuring the expansion rate of shredded tobacco according to claim 5, characterized in that: The vibration mechanism is a flexible vibration disk.

7. The device for measuring the expansion rate of shredded tobacco according to claim 6, characterized in that: The vibration source of the flexible vibration plate is an ultrasonic vibrator.

8. The device for measuring the expansion rate of shredded tobacco according to claim 4, characterized in that: The image collector is slidably arranged on a column via a support arm, and the column is fixed on a mounting base plate.

9. The device for measuring the expansion rate of shredded tobacco according to claim 8, characterized in that: A vertical first threaded hole is provided on the column, a screw rod is threadedly connected to the first threaded hole, an upper end of the screw rod protrudes from the first threaded hole and is fixed with an adjusting hand wheel; A vertical second threaded hole is provided at the first end of the support arm, the second threaded hole is threadedly connected to the screw rod, and the first end of the support arm is located below the first threaded hole.

10. The device for measuring the expansion rate of shredded tobacco according to claim 8, characterized in that: It also includes a controller and a shooting angle adjustment mechanism of the image collector, wherein the shooting angle adjustment mechanism is arranged at the second end of the support arm, and the controller is connected to the actuator signal of the shooting angle adjustment mechanism.

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