Curled tobacco shred flattening device, tobacco shred width detection device and detection method

Abstract

The invention discloses a curled cut tobacco flattening device, a cut tobacco width detection device and a detection method, the cut tobacco flattening device comprises a rack, a feeding mechanism, a driving gear, a driven gear, a posture control mechanism and a cleaning brush, the cut tobacco width detection device adopts the cut tobacco flattening device, and the curled cut tobacco flattening device further comprises an industrial camera and a light source. Tobacco shreds to be detected are conveyed through the feeding mechanism, and curled tobacco shreds are flattened through extrusion of the feeding belt and the tobacco shred flattening roller. According to the tobacco shred width measuring device, the tobacco shred can reach the lying posture, it is guaranteed that tobacco shred width measurement is conducted through the machine vision technology when the tobacco shred is in the lying state, the result is output, the orthographic projection plane of the tobacco shred is detected during tobacco shred width detection, and the tobacco shred width detection accuracy is greatly improved. The tobacco shred width detection device is good in real-time performance and flexible and light in structural arrangement, online real-time detection of the tobacco shred width can be achieved, the detected tobacco shred can be automatically conveyed back to a production line, and damage and waste to the tobacco shred cannot be caused.

Description

Technical Field

[0001] The present invention relates to a curled cut tobacco flattening device, a cut tobacco width detection device and a detection method, in particular to a device for flattening irregularly shaped curled cut tobacco. In the flattened state of the cut tobacco, it is beneficial to use an industrial camera to collect images of the cut tobacco, and finally use machine vision technology to measure the width of the cut tobacco in real time and output the accurate cut tobacco width. The accurate measurement of the cut tobacco width in the cigarette industry can be realized, the influence of the irregular shape of the cut tobacco on the detection result can be effectively reduced, and the purpose of improving the detection accuracy of the cut tobacco width can be achieved, belonging to the technical field of automation equipment. Background Art

[0002] During the actual production process of cigarettes, cut tobacco with different formulas, batches, moisture contents, and weather changes (temperature and humidity of the production environment) will have different cut widths under the same cutting parameters. The cutting parameters set by the cutting machine cannot be uniformly applied, which greatly reduces the uniformity of the cut tobacco width, is not conducive to the development of subsequent processes, and leads to the loss and waste of tobacco leaves, affecting the overall quality of cigarettes. In order to avoid economic losses caused by such quality accidents, when cutting tobacco with different formulas, batches, and moisture contents, some cigarette production enterprises have begun to study the uniformity control of the cut width in the aspect of automatic quality control or automatic cut width detection in the cutting process. At present, tobacco projectors are generally used in each cigarette factory to detect the cut width. Basically flat cut tobacco is mainly selected manually, and after being magnified by the projector, the inspectors read the values by comparing with the scale, that is, it is guaranteed through an intermittent manual sampling and off-line detection system. This kind of manual operation has a large workload, low resolution (accuracy is 0.1 mm), and there are certain errors in manual reading. The detection result is not accurate enough and the efficiency is too low to meet the production requirements of the cigarette industry.

[0003] Currently, there are many publicly disclosed technologies for detecting the cut tobacco width based on machine vision technology, such as: CN202111113063.4 discloses a method and device for detecting the cut tobacco width; CN202111229548.X discloses a cut tobacco width detection method, system, terminal and storage medium; CN202011337868.2 discloses a computer vision cut tobacco width detection method based on a variable-diameter circle, etc. However, most of these patent disclosure documents collect images in the free state of the cut tobacco, without flattening the cut tobacco. The detected cut tobacco is not the "orthographic projection" surface of the cut tobacco, resulting in low detection accuracy; although CN202011337868.2 solves the curling problem of the cut tobacco to a certain extent by squeezing the cut tobacco from the front with a glass sheet, it is extremely easy to wrinkle the curled cut tobacco and cannot achieve the purpose of flattening, affecting the detection result. That is, the existing related technologies cannot meet the overall requirements of cigarette factories.

[0004] In summary, the current detection of cut tobacco width mainly relies on machine vision technology to measure the width of cut tobacco. The technical means adopted is mainly the offline method, and the sampling process of cut tobacco still remains manual sampling. There are few automatic sampling and automatic detection methods. In addition, when detecting the width of cut tobacco, it is often detected in a free state without controlling the posture of the cut tobacco. As a result, the detected result will have a large error compared with the actual value. This is mainly because the cut tobacco is curled in a free state, and when detecting the width, the cut tobacco needs to be "lying flat". Otherwise, the front projection plane of the cut tobacco cannot be detected. Therefore, when detecting the width of cut tobacco, the posture of the cut tobacco is an important factor affecting the detection result. Aiming at the disadvantages of low detection accuracy and low detection efficiency in the current detection of cut tobacco width in the cigarette industry, developing an efficient and accurate cut tobacco width detection technology is a key problem that urgently needs to be solved in the current cigarette industry technology field. Summary of the Invention

[0005] Aiming at the problems of low efficiency and low detection accuracy in the process of detecting the width of cut tobacco in the current cigarette industry technology field, the present invention uses automated technical means to accurately measure the width of cut tobacco instead of manual labor, and innovatively develops a new width detection method or technology that can control the shape of curled cut tobacco, so as to achieve the purpose of liberating the labor force, improving the accuracy of cut tobacco width detection, and enhancing the overall detection efficiency and automation level. The core lies in providing a technical method for automatically flattening curled cut tobacco, enabling the cut tobacco to reach a "lying flat" posture, and ensuring that the width of the cut tobacco is measured by machine vision technology in the "lying flat" state and the result is output. When detecting the width of cut tobacco, the front projection plane of the cut tobacco is detected, greatly improving the accuracy of cut tobacco width detection.

[0006] The technical solution of the present invention is as follows:

[0007] A curled cut tobacco flattening device can flatten curled cut tobacco, enabling the industrial camera to capture the front projection plane of the cut tobacco during image acquisition, improving the accuracy and working efficiency of cut tobacco width detection. Using machine vision to measure the width of cut tobacco can reduce the error of traditional manual reading and improve the detection efficiency; it can achieve the purpose of improving production efficiency, liberating the labor force, and continuous online flattening. The overall structural schematic diagram of the device is shown in Appendix Figure 1 Appendix Figure 2 Appendix Figure 3 as shown, and mainly includes a frame, a feeding mechanism, a driving gear, a driven gear, a posture control mechanism, a cleaning brush, an industrial camera, and a light source. Among them, the feeding mechanism consists of a feeding driving roller, a feeding driven roller, a feeding tensioning roller, and a feeding belt. The posture control mechanism consists of a posture control driving roller, a camera right positioning roller, a camera left positioning roller, a cut tobacco flattening roller, a tensioning roller, and a transparent conveyor belt.

[0008] The frame serves as the main supporting structural component of the device; the feeding driving roller and the feeding driven roller are fixed on the frame and connected by a feeding belt. The feeding tensioning roller is arranged on the frame to tension the feeding belt, and the cut tobacco on the feeding belt can be conveyed by the drive of the feeding driving roller.

[0009] The overall attitude control mechanism is located above the feeding mechanism. The attitude control driving roller, the camera right positioning roller, the camera left positioning roller and the cut tobacco flattening roller in the attitude control mechanism are fixed on the frame. The attitude control driving roller is located above the side of the feeding driving roller, and the cut tobacco flattening roller is in the upper position between the feeding driving roller and the feeding driven roller. The transparent conveyor belt bypasses the attitude control driving roller, the camera right positioning roller, the camera left positioning roller and the cut tobacco flattening roller and is tensioned by a tensioning roller.

[0010] The feeding mechanism can convey the discrete curly cut tobacco to be measured into the detection device; the driving gear is arranged on the feeding mechanism, and the driven gear is fixed on the attitude control mechanism. Through the meshing transmission of the driving gear and the driven gear, it can ensure that the feeding mechanism and the attitude control mechanism move in the same direction and at the same speed, realizing the attitude maintenance of the cut tobacco; one end of the cleaning brush is arranged on the frame, and the other end is provided with a sandwich for the transparent conveyor belt to pass through. The sandwich is in a clamping shape, and the transparent conveyor belt can be cleaned through the cleaning brush to prevent excessive dust accumulation on the transparent conveyor belt from affecting the cut tobacco width detection result.

[0011] The driving gear is fixed at one end of the feeding driving roller, and the driven gear is fixed at one end of the attitude control driving roller. Through the meshing transmission of the driving gear and the driven gear, the feeding mechanism and the attitude control mechanism can adopt the same power, realizing the same-direction and same-speed operation of the transparent conveyor belt and the feeding belt, and effectively maintaining the attitude of the cut tobacco sandwiched in the middle. The number of teeth and the module of the driving gear and the driven gear are the same.

[0012] Furthermore, the cut tobacco flattening roller and the attitude control driving roller in the attitude control mechanism are in contact with the feeding belt in the feeding mechanism, so that the cut tobacco can be automatically flattened when passing through the contact part of the cut tobacco flattening roller and the feeding belt. At the same time, it can also ensure the same-direction and same-speed movement of the feeding belt and the transparent conveyor belt, and keep the flattened cut tobacco in a flattened attitude and convey it forward under the clamping action of the feeding belt and the transparent conveyor belt. The feeding belt is made of a flexible material. Since the selected feeding belt has a certain flexibility, it will not damage or flatten the cut tobacco during flattening.

[0013] A cut tobacco width detection device includes a cut tobacco flattening device of the present invention as described above, and also an industrial camera and a light source. The industrial camera is arranged on the frame and is placed at the center of the attitude control mechanism. Through the industrial camera, the cut tobacco to be measured can be imaged through the transparent conveyor belt, and the acquisition result is transmitted to an external computer, that is, the precise detection of the width of the cut tobacco is realized by using machine vision technology; the light source is fixed between the attitude control mechanism and the industrial camera, and mainly provides illumination for the image acquisition of the industrial camera.

[0014] The method for realizing the attitude control and width detection of the cut tobacco of the present invention is specifically as follows:

[0015] At the beginning of S1, the system starts to work, and the discrete cut tobacco to be detected is independently placed on the feeding belt.

[0016] In S2, driven by the feeding driving roller, the feeding belt is driven to convey forward, and the discrete cut tobacco to be detected enters the fitting area composed of the cut tobacco flattening roller and the feeding belt.

[0017] In S3, through the meshing transmission of the driving gear and the driven gear, the cut tobacco flattening roller and the feeding belt run relatively and extrude at the same speed. Through the step extrusion force field of the cut tobacco flattening roller and the feeding belt, the curled cut tobacco is gradually flattened from front to back. The flattened cut tobacco is guaranteed in attitude under the fitting and clamping of the transparent conveyor belt and the feeding belt and is conveyed forward.

[0018] In S4, during the forward conveying process of the cut tobacco, the industrial camera images the cut tobacco through the transparent conveyor belt, and the acquisition result is transmitted to the computer.

[0019] In S5, the computer calculates the acquired cut tobacco image to obtain the width value of the cut tobacco, and statistically processes multiple groups of data, and outputs the statistical result of the cut tobacco width.

[0020] In S6, after the cut tobacco image is acquired, the cut tobacco continues to be conveyed forward and leaves the system along with the transparent conveyor belt and the feeding belt. In this way, the real-time width value of the sampled cut tobacco is output.

[0021] In S7, repeat the above S1 to S6 to detect the next group of cut tobacco to be measured. The precise detection of the width value of the cut tobacco can be realized and the statistical result can be output.

[0022] The working principle of the present invention is:

[0023] A curled cut tobacco flattening device, a cut tobacco width detection device and a detection method, comprising a frame, a feeding mechanism, a driving gear, a driven gear, an attitude control mechanism, a cleaning brush, an industrial camera and a light source. The feeding mechanism mainly consists of a feeding driving roller, a feeding driven roller, a feeding tensioning roller and a feeding belt. The attitude control mechanism mainly consists of an attitude control driving roller, a camera right positioning roller, a camera left positioning roller, a cut tobacco flattening roller, a tensioning roller and a transparent conveyor belt. The frame is the main supporting structural member; there is a set of feeding mechanism and attitude control mechanism respectively, both are fixed on the frame, and the discrete cut tobacco to be measured can be conveyed to the detection device through the feeding mechanism; the driving gear is arranged on the feeding driving roller in the feeding mechanism, and the driven gear is arranged on the attitude control driving roller in the attitude control mechanism. Through the meshing transmission of the driving gear and the driven gear, the feeding mechanism and the attitude control mechanism move in the same direction and at the same speed; the attitude control mechanism is arranged above the feeding mechanism, and the cut tobacco flattening roller and the attitude control driving roller in the attitude control mechanism are in contact with the feeding belt in the feeding mechanism, so that the feeding belt and the transparent conveyor belt move in the same direction and at the same speed in contact, which can ensure that the flattened cut tobacco maintains a flattened attitude and is conveyed forward under the clamping of the feeding belt and the transparent conveyor belt; one end of the cleaning brush is arranged on the frame, and the other end clamps the transparent conveyor belt in the attitude control mechanism, which can clean the transparent conveyor belt; the industrial camera is arranged on the frame and can collect images of the cut tobacco to be measured through the transparent conveyor belt; the light source is fixed between the attitude control mechanism and the industrial camera, which can provide illumination for the image collection of the industrial camera.

[0024] First, the system starts to work, and the discrete cut tobacco to be detected is independently placed on the feeding belt; secondly, driven by the feeding driving roller, the feeding belt is driven to convey forward, and the discrete cut tobacco to be detected enters the contact area composed of the cut tobacco flattening roller and the feeding belt; then, through the meshing transmission of the driving gear and the driven gear, the cut tobacco flattening roller and the feeding belt run relatively and squeeze at the same speed. Using the step-by-step extrusion force field of the cut tobacco flattening roller and the feeding belt, the curled cut tobacco is gradually flattened from front to back. The flattened cut tobacco maintains a flattened attitude and is conveyed forward under the clamping of the transparent conveyor belt and the feeding belt; furthermore, during the forward conveyance of the cut tobacco, it enters the image collection area of the industrial camera. The industrial camera collects images of the cut tobacco through the transparent conveyor belt, and transmits the collection result to the computer. The computer calculates the collected cut tobacco images, obtains the width values of all cut tobacco in this image and conducts statistics, and outputs the statistical result of the cut tobacco width in this image; finally, after the cut tobacco image is collected, the cut tobacco continues to be conveyed forward and leaves the system with the transparent conveyor belt and the feeding belt. In this way, the real-time width value of the cut tobacco to be detected can be continuously and real-time output.

[0025] The beneficial effects of the present invention include:

[0026] Ⅰ. The flattening of curly cut tobacco is achieved by the step extrusion force field of the cut tobacco flattening roller and the feeding belt. The fitting and clamping action of the transparent conveyor belt and the feeding belt ensures the forward transportation of the cut tobacco in the flattened state, enabling the industrial camera to capture the orthographic projection plane of the cut tobacco during image acquisition, greatly improving the accuracy of cut tobacco width detection.

[0027] Ⅱ. Multiple cut tobaccos can be flattened at one time, greatly improving the work efficiency and effectively liberating the labor force. The use of machine vision to measure the width of cut tobacco greatly reduces the error of traditional manual reading and improves the detection efficiency.

[0028] Ⅲ. The width of cut tobacco can be continuously detected, and the detection result of cut tobacco width is output in a timely manner with good real-time performance. The structure layout is flexible and light, enabling on-line real-time detection of cut tobacco width. At the same time, the cut tobacco after detection can return to the production line to enter the next process without causing damage and waste to the cut tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the present invention;

[0030] Figure 2 is the axonometric structure diagram of the present invention;

[0031] Figure 3 is the side view structural diagram of the present invention;

[0032] Figure 4 is the schematic diagram of the cut tobacco flattening principle of the present invention;

[0033] Figure 5 is the flow chart of realizing cut tobacco width detection of the present invention;

[0034] Wherein: 1 - frame; 2 - feeding mechanism; 201 - feeding driving roller; 202 - feeding driven roller; 203 - feeding tensioning roller; 204 - feeding belt; 3 - driving gear; 4 - driven gear; 5 - attitude control mechanism; 501 - attitude control driving roller; 502 - camera right positioning roller; 503 - camera left positioning roller; 504 - cut tobacco flattening roller; 505 - tensioning roller; 506 - transparent conveyor belt; 6 - cleaning brush; 7 - industrial camera; 8 - light source; 9 - computer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following further describes the process of realizing automatic cut tobacco flattening and automatic cut tobacco width detection of the present invention in conjunction with the drawings. The following embodiments are further descriptions of the present invention based on the content of the present invention, and are only preferred embodiments of the present invention, and are not used to limit the present invention. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0036] Example 1

[0037] A curled cut tobacco flattening device and a cut tobacco width detection device can flatten the curled cut tobacco, enabling the industrial camera to capture the orthographic projection plane of the cut tobacco during image acquisition, improving the accuracy and working efficiency of cut tobacco width detection. Measuring the cut tobacco width using machine vision can reduce the error of traditional manual reading and improve the detection efficiency; it can achieve the purpose of timely output of the cut tobacco width detection result, good real-time performance, and online real-time detection. The overall structural schematic diagram of the device is as shown in Figure 1 、 Figure 2 and Figure 3 shown, mainly including a frame 1, a feeding mechanism 2, a driving gear 3, a driven gear 4, an attitude control mechanism 5, a cleaning brush 6, an industrial camera 7, a light source 8 and a computer 9. Among them, the feeding mechanism 2 is also composed of a feeding driving roller 201, a feeding driven roller 202, a feeding tensioning roller 203 and a feeding belt 204. The attitude control mechanism 5 is also composed of an attitude control driving roller 501, a camera right positioning roller 502, a camera left positioning roller 503, a cut tobacco flattening roller 504, a tensioning roller 505 and a transparent conveyor belt 506. The connection situation of each structural member is as shown in Figure 1 and Figure 2 shown. The frame 1 serves as the main supporting structural member of the device; the feeding driving roller 201 and the feeding driven roller 202 are fixed on the frame 1 and connected by the feeding belt 204, and the feeding tensioning roller 203 is arranged on the frame 1 to tension the feeding belt 204. The attitude control driving roller 501, the camera right positioning roller 502, the camera left positioning roller 503 and the cut tobacco flattening roller 504 in the attitude control mechanism 5 are fixed on the frame 1 and placed above the feeding mechanism 2, and the transparent conveyor belt 506 bypasses the attitude control driving roller 501, the camera right positioning roller 502, the camera left positioning roller 503 and the cut tobacco flattening roller 504 and is tensioned by the tensioning roller 505. The cut tobacco flattening roller 504 and the attitude control driving roller 501 are in contact with the feeding belt 204 in the feeding mechanism 2, so that the feeding belt 204 is in contact with the transparent conveyor belt 506. The driving gear 3 is fixed at one end of the feeding driving roller 201, and the driven gear 4 is fixed at one end of the attitude control driving roller 501, as shown in Figure 2As shown in the figure, through the meshing transmission of the driving gear 3 and the driven gear 4, the feeding mechanism 2 and the attitude control mechanism 5 can adopt the same power, so that the transparent conveyor belt 506 and the feeding belt 204 are attached together and move in the same direction and at the same speed. When the cut tobacco passes through the joint part of the cut tobacco flattening roller 504 and the feeding belt 204, it can be automatically flattened, and under the clamping action of the feeding belt 204 and the transparent conveyor belt 506, it is kept in a flattened attitude and conveyed forward. One end of the cleaning brush 6 is arranged on the frame 1, and the other end clamps the transparent conveyor belt 506 in the attitude control mechanism 5. The transparent conveyor belt 506 can be cleaned through the cleaning brush 6 to prevent excessive dust accumulation on the transparent conveyor belt 506 from affecting the cut tobacco width detection result; the industrial camera 7 is arranged on the frame 1 and is placed at the center of the attitude control mechanism 5. The industrial camera 7 can collect images of the cut tobacco to be measured through the transparent conveyor belt 506 and transmit the collected results to an external computer, that is, the precise width detection of the cut tobacco is realized by using machine vision technology; the light source 8 is fixed between the attitude control mechanism 5 and the industrial camera 7, mainly providing illumination for the image collection of the industrial camera 7.

[0038] The flattening principle of the cut tobacco realized by the present invention is as Figure 4 shown in the figure. The curly cut tobacco is placed on the feeding belt 204. Driven by the power of the feeding driving roller 201, the cut tobacco is conveyed forward on the feeding belt 204 and enters the extrusion force field composed of the feeding belt 204 and the cut tobacco flattening roller 504. Through the relative extrusion action of the cut tobacco flattening roller 504 and the feeding belt 204, after the cut tobacco passes through this extrusion gap, the curly cut tobacco can be flattened. And it is ensured to be conveyed forward in a flattened state under the clamping action of the transparent conveyor belt 506 and the feeding belt 204.

[0039] Embodiment 2

[0040] As Figure 5 shown in the figure, a method for detecting the width of cut tobacco. To realize the attitude control of the cut tobacco and the automatic detection function of the width of the cut tobacco, the specific implementation steps are as follows:

[0041] At the beginning of S1, the system starts to work, and the discrete cut tobacco to be detected is independently placed on the feeding belt 204, and try to ensure that there is no overlap and entanglement of the cut tobacco;

[0042] In S2, driven by the feeding driving roller 201, the cut tobacco is conveyed forward along with the feeding belt 204 and enters the extrusion gap composed of the cut tobacco flattening roller 504 and the feeding belt 204;

[0043] Through the meshing transmission of the driving gear 3 and the driven gear 4, the tobacco spreading roller 504 and the feeding belt 204 run relatively under extrusion. Through the step extrusion force field of the tobacco spreading roller 504 and the feeding belt 204, the curled tobacco is gradually flattened from front to back. The flattened tobacco maintains a flattened posture under the fitting and clamping of the transparent conveyor belt 506 and the feeding belt 204 and is conveyed forward;

[0044] S4 During the forward conveyance of the tobacco, the industrial camera 7 acquires images of the tobacco through the transparent conveyor belt 506 and transmits the acquisition results to the computer.

[0045] S5 The computer calculates the acquired tobacco images, obtains the width values of all the tobacco in the image and performs statistics, and outputs the statistical results of the tobacco width in the image.

[0046] S6 After the acquisition of the tobacco images is completed, the tobacco continues to be conveyed forward and leaves the system with the transparent conveyor belt 506 and the feeding belt 204. In this way, by circulating, the real-time width value of the tobacco to be detected can be continuously and real-timely output.

[0047] Embodiment 3

[0048] When calculating the tobacco width of the obtained tobacco images in Embodiment 2, a preferred embodiment that can be adopted is:

[0049] (1) Segment the acquired tobacco images to separate the tobacco images from the background;

[0050] (2) Extract the edge contours of the tobacco, decompose the tobacco into n segments in the length direction, and ensure that the length of each segment of tobacco is greater than the width;

[0051] (3) Respectively use the centers of these n segments of tobacco as the centers of circles to make inscribed circles tangent to the edge contours of the tobacco;

[0052] (4) Then use the diameter of this circle as the pixel width value d of the tobacco at this position, and the real width value D of the tobacco to be detected at this position can be obtained, where D = d / i (i is the image resolution);

[0053] (5) Repeat the above detection steps (1)-(4) to complete the width detection of all the center positions of the single tobacco to be detected;

[0054] (6) Statistically calculate and calculate the average value D of the diameters of the inscribed variable-diameter circles of the entire tobacco to obtain the actual average width of the tobacco to be detected. At the same time, the variance, range and other values of the width data of this tobacco can be calculated to evaluate the width uniformity and volatility of the tobacco.

Claims

1. A curled tobacco flattening device, characterized in that: The device comprises a frame (1), a feeding mechanism (2), a driving gear (3), a passive gear (4), a posture control mechanism (5) and a cleaning brush (6), wherein: The feeding mechanism (2) and the posture control mechanism (5) are fixed on the frame (1), and the posture control mechanism (5) is located above the feeding mechanism (2); The feeding mechanism (2) comprises a feeding active roller (201), a feeding passive roller (202), a feeding tensioning roller (203) and a feeding belt (204); the feeding active roller (201), the feeding passive roller (202) and the feeding tensioning roller (203) are all fixed on the frame (1); the feeding belt (204) circulates around the feeding active roller (201) and the feeding passive roller (202) and is tensioned by the feeding tensioning roller (203); The posture control mechanism (5) comprises a posture control active roller (501), a camera right positioning roller (502), a camera left positioning roller (503), a tobacco flattening roller (504), a tensioning roller (505) and a transparent conveyor belt (506); the posture control active roller (501), the camera right positioning roller (502), the camera left positioning roller (503) and the tobacco flattening roller (504) form four vertices and are respectively fixed on the frame (1); the transparent conveyor belt (506) circulates around the posture control active roller (501), the camera right positioning roller (502), the camera left positioning roller (503) and the tobacco flattening roller (504) and is tensioned by the tensioning roller (505); The tobacco flattening roller (504) and the posture control active roller (501) are in contact with the feeding belt (204) in the feeding mechanism (2); The driving gear (3) is fixed to one end of the feeding driving roller (201), and the driven gear (4) is fixed to one end of the posture control driving roller (501). Through the meshing transmission of the driving gear (3) and the driven gear (4), the transparent conveyor belt (506) and the feeding belt (204) are attached and run in the same direction and at the same speed. The curled tobacco on the feeding belt (204) can be automatically flattened when passing through the attached part between the tobacco flattening roller (504) and the feeding belt (204), and is transported forward while maintaining the flattened posture under the attached clamping action of the feeding belt (204) and the transparent conveyor belt (506); One end of the cleaning brush (6) is arranged on the frame (1), and the other end is provided with an interlayer for the transparent conveyor belt (506) to pass through, and the interlayer is in a clamping shape to achieve cleaning of the cleaning brush (6).

2. A tobacco width detection device, characterized in that: It comprises a curled tobacco flattening device as claimed in claim 1, and also comprises an industrial camera (7) arranged directly above the transparent conveyor belt (506), the industrial camera (7) collects images of the tobacco to be tested through the transparent conveyor belt (506), and transmits the collected results to a computer (9), and the computer (9) uses machine vision technology to realize accurate detection of the width of the tobacco.

3. A tobacco width detection device according to claim 2, characterized in that: It also includes a light source (8) fixed between the posture control mechanism (5) and the industrial camera (7) for providing lighting for image acquisition by the industrial camera (7).

4. A tobacco width detection device according to any one of claims 1 to 3, characterized in that: The number of teeth and the module of the driving gear (3) and the driven gear (4) are the same.

5. A tobacco width detection device according to any one of claims 1 to 3, characterized in that: The feeding belt (204) is made of flexible material.

6. A method for detecting tobacco width, characterized in that: Using a tobacco width detection device as claimed in any one of claims 1 to 5, the detection method comprises: The S1 system starts working and places the discrete tobacco to be tested independently on the feeding belt; S2, driven by the active feeding roller, drives the feeding belt to convey forward, and makes the discrete tobacco to be detected enter the fitting area formed by the tobacco flattening roller and the feeding belt; S3 uses the meshing transmission of the driving gear and the driven gear to make the tobacco flattening roller and the feeding belt run at the same speed. The curled tobacco is gradually flattened from front to back through the stepping extrusion force field of the tobacco flattening roller and the feeding belt. The flattened tobacco is clamped by the transparent conveyor belt and the feeding belt to ensure the posture of the tobacco and transport it forward. During the forward conveying process of S4 tobacco, an industrial camera collects images of tobacco through a transparent conveyor belt and transmits the collected results to a computer; S5 calculates the collected tobacco images through a computer to obtain the width value of the tobacco, and performs statistics on multiple groups of data to output the statistical results of the tobacco width; After S6 completes tobacco image acquisition, the tobacco continues to be transported forward with the transparent conveyor belt and the feeding belt to leave the system, and the cycle continues, outputting the real-time width value of the sampled tobacco; S7 repeats the above S1 to S6 to test the next group of tobacco shreds to be tested, so as to achieve accurate detection of the width value of the tobacco shreds and output statistical results.

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