A tobacco leaf grading analysis research screening line and a screening method thereof

Abstract

The present application relates to the field of tobacco grading, more particularly, to a tobacco grading analysis research screening line, comprising a display screen, a tobacco conveyor and a tobacco basket arranged on the tobacco conveyor, the tobacco conveyor is provided with a tobacco conveying belt for conveying tobacco, and the tobacco conveying belt is provided with a positioning sheet; the tobacco basket is respectively provided with a near-infrared scanning device and an image recognition device, and a partition plate is arranged between the near-infrared scanning device and the image recognition device; sensors are arranged on the partition plate and the tobacco basket; when the sensors on the partition plate and the tobacco basket sense the positioning sheet on the tobacco conveying belt, the sensors control the image recognition device and the near-infrared scanning device to identify and scan the tobacco in sequence, and transmit the grading analysis result to the display screen; the tobacco grading analysis research screening line disclosed by the present application identifies and scans the tobacco in an automatic manner, which facilitates people to analyze and research the tobacco grading.

Description

Technical Field

[0001] This invention relates to the field of tobacco leaf grading, and more specifically, to a screening line for tobacco leaf grading analysis and a screening method thereof. Background Technology

[0002] Tobacco leaf grading is the process of classifying tobacco leaves according to their quality. The purpose is to separate tobacco leaves of different qualities, so that each grade of tobacco leaves has relative inhibition, which facilitates the purchase and sale of tobacco leaves based on amino acid pricing, and also makes it easier for cigarette companies to select raw materials of different grades.

[0003] Currently, tobacco leaf grading is generally done manually. However, manual grading is prone to errors and omissions, and is inefficient. To address this issue, some tobacco leaf grading and sorting machines have been introduced to the market, such as the Chinese invention patent "Automated Tobacco Leaf Detection and Grading System" (patent number 2021205499187). While these machines have improved efficiency and solved the problem of errors in manual grading to some extent, their complex structure results in high production costs and requires a large floor space. Therefore, some small-scale manufacturers can only use traditional methods to sort tobacco leaves.

[0004] Therefore, it is necessary to propose a screening line and screening method for tobacco leaf grading analysis to solve the above problems. Summary of the Invention

[0005] To overcome at least one of the defects (deficiencies) of the prior art, the present invention provides a screening line for tobacco leaf grading analysis and a screening method thereof.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: a tobacco leaf grading and analysis screening line, including a display screen, a tobacco leaf conveyor, and tobacco leaf baskets set on the tobacco leaf conveyor;

[0007] The tobacco leaf conveyor is equipped with a tobacco leaf conveyor belt for transporting tobacco leaves, and the tobacco leaf conveyor belt is equipped with positioning plates;

[0008] The tobacco leaf basket is equipped with a near-infrared scanning device and an image recognition device, and an isolation plate is provided between the near-infrared scanning device and the image recognition device. Sensors are provided on both the isolation plate and the tobacco leaf basket.

[0009] When the sensors on the tobacco basket and the isolation plate sense the positioning sheet on the tobacco conveying belt, the sensors control the image recognition device and the near-infrared scanning device to recognize and scan the tobacco in sequence, and transmit the grading analysis result to the display screen.

[0010] Further, the near-infrared scanning device comprises a first mounting positioning shaft, a second mounting positioning shaft, a near-infrared scanner and a near-infrared scanning probe connected with the display screen.

[0011] The bottom of the near-infrared scanner is provided with a probe hole protruding outward, and the near-infrared scanning probe is arranged in the probe hole.

[0012] The first mounting positioning shaft and the second mounting positioning shaft are horizontally arranged.

[0013] The two sides of the near-infrared scanner are fixed on the tobacco basket through the first mounting positioning shaft and the second mounting positioning shaft.

[0014] Further, the sensors on the isolation plate and the tobacco basket are both in-place sensors.

[0015] Further, the image recognition device comprises a fill light and an industrial camera for shooting the tobacco.

[0016] The fill light is arranged on the top of the tobacco basket, and the industrial camera is connected with the display screen.

[0017] The adjusting mounting base is arranged between the adjacent light supplement lamps, the industrial camera is arranged in the adjusting mounting base and has adjustable height, the adjusting mounting base is arranged between the adjacent light supplement lamps, so that sufficient light source is ensured when the industrial camera is used for shooting, and in actual application, the mounting height of the industrial camera can be adjusted according to the shooting requirement, which all belong to the protection scope of the present application.

[0018] Further, the tobacco conveying machine comprises a tobacco conveying support frame, a tobacco conveying driving motor, a tobacco conveying driving roller and a tobacco conveying driven roller.

[0019] The tobacco conveying driving roller and the tobacco conveying driven roller are arranged on the two sides of the tobacco conveying support frame respectively, and the tobacco conveying driving roller and the tobacco conveying driven roller are connected through a tobacco conveying belt.

[0020] The tobacco conveying driving motor is connected with the tobacco conveying driving roller, the tobacco conveying driving motor drives the tobacco conveying driving roller, so that the tobacco conveying belt on the tobacco conveying driving roller can drive the tobacco to move forward, and the near-infrared scanning device and the image recognition device can detect the tobacco on the tobacco conveying belt.

[0021] Further, the tobacco conveying support frame is provided with an adjustable height tension adjusting roller, the tension adjusting roller is pressed on the inner side or the outer side of the tobacco conveying belt, and the tension adjusting roller can be used for adjusting the tension of the tobacco conveying belt, and the tobacco conveying belt can be conveniently installed and dismounted.

[0022] Further, the control cabinet is arranged at the bottom of the tobacco conveying machine, the control cabinet is connected with the display screen, the tobacco conveying machine, the near-infrared scanning device and the image recognition device respectively, the control cabinet can be used for quickly controlling the display screen, the tobacco conveying machine, the near-infrared scanning device and the image recognition device respectively, and emergency braking of each component can be facilitated.

[0023] Further, the display screen is arranged on the tobacco conveying machine or the tobacco basket, the bottom of the tobacco conveying machine is provided with a sliding wheel, the display screen can be arranged on the tobacco conveying machine or the tobacco basket according to the use requirement in actual application, and both are within the protection scope of the present application, and the sliding wheel can be used for facilitating the carrying and moving of the tobacco conveying machine.

[0024] Further, the tobacco conveying machine is provided with a first laser emitter for limiting and detecting the stacking height of the tobacco at both ends.

[0025] The middle part of the tobacco conveyor is provided with a second laser emitter-receiver for detecting the length and width of the tobacco, and the first laser emitter-receiver and the second laser emitter-receiver are connected with a display screen respectively, since the first laser emitter-receiver is arranged at the two ends of the tobacco conveyor, the stacking height of the tobacco can be quickly measured through the emission and reception of the first laser emitter-receiver, and in actual application, the signal receiver for receiving the signal of the second laser emitter-receiver can be arranged on the tobacco conveying belt, the length and width of the tobacco can be detected through the second laser emitter-receiver and the signal receiver, and the data of the tobacco can be quickly collected by using intelligent equipment, the efficiency is improved, and the subsequent tobacco grading can be facilitated to make a referential index.

[0026] In the application, a tobacco grading analysis research screening method is also disclosed, which comprises the following steps:

[0027] S1, covering the tobacco on the signal receiver of the tobacco conveying belt, and making the end of the tobacco flush with the positioning sheet on the tobacco conveying belt;

[0028] S2, the first laser emitter-receiver at the two ends of the tobacco conveyor emits and receives the tobacco on the tobacco conveying belt to determine the stacking height of the tobacco;

[0029] S3, the second laser emitter-receiver on the tobacco conveyor emits to the tobacco, and according to the signal receiving condition of the signal receiver, the length and width of the stacked tobacco are determined;

[0030] S4, the tobacco conveying belt transports the tobacco to the tobacco basket, the in-place sensor on the tobacco basket and the positioning sheet on the tobacco conveying belt induct each other, and the image recognition device is triggered to recognize the shape of the tobacco and take a picture of the stacking shape of the tobacco;

[0031] S5, the tobacco conveying belt transports the tobacco through the isolation plate, the in-place sensor on the isolation plate and the positioning sheet on the tobacco conveying belt induct each other, and the near-infrared scanning device is triggered to scan the tobacco and analyze the composition of the tobacco;

[0032] S6, the first laser emitter-receiver, the second laser emitter-receiver, the image recognition device and the near-infrared scanning device transmit the collected information to the display screen.

[0033] Compared with the prior art, the technical scheme of the application has the beneficial effects that:

[0034] The tobacco grading analysis research screening line disclosed by the application separates the near-infrared scanning device and the image recognition device by the isolation plate, so that the near-infrared scanning device and the image recognition device can be prevented from affecting each other during work. In addition, the sensor arranged on the isolation plate and the tobacco basket is used to identify the positioning sheet on the tobacco conveying belt in an automatic manner, so that the position of the tobacco can be accurately identified, and the near-infrared scanning device and the image recognition device can be triggered to perform near-infrared scanning and identification on the tobacco, so that the tobacco can be comprehensively detected to obtain accurate data and parameters of the tobacco. Since the structure is relatively simple, the production cost is low, and the device is suitable for use by manufacturers of different scales, thereby reducing the labor intensity of people and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic diagram of the tobacco grading analysis research screening line in the application.

[0036] Figure 2 is a structural schematic diagram of the tobacco grading analysis research screening line in the application from another angle.

[0037] Figure 3 is a structural schematic diagram of the tobacco grading analysis research screening line in the application after the tobacco basket is opened.

[0038] Figure 4 is a structural schematic diagram of the tension adjusting roller arranged on the tobacco grading analysis research screening line in the application.

[0039] Figure 5 is a structural schematic diagram of the near-infrared scanning device and the image recognition device arranged in the tobacco basket in the application.

[0040] Figure 6 is an enlarged view of the structure of the near-infrared scanning device in the application.

[0041] Figure 7 is an enlarged view of the structure of the image recognition device in the application.

[0042] Figure 8 is an enlarged view of the tension adjusting roller arranged on the tobacco conveying machine in the application.

[0043] Figure 9 is an enlarged view of the structure of the first laser emitter arranged on the tobacco conveying machine in the application.

[0044] Figure 10 is an enlarged view of the structure of the second laser emitter arranged on the tobacco conveying machine in the application.

[0045] In the figure, 1 is a display screen, 2 is a tobacco conveyor, 3 is a tobacco basket, 4 is a tobacco conveying belt, 5 is a positioning sheet, 6 is a near-infrared scanning device, 7 is an image recognition device, 8 is an isolation plate, 9 is a sensor, 10 is a first mounting positioning shaft, 11 is a second mounting positioning shaft, 12 is a near-infrared scanner, 13 is a near-infrared scanning probe, 14 is a probe hole, 15 is a light supplement lamp, 16 is an industrial camera, 17 is an adjusting mounting seat, 18 is a tobacco conveying support frame, 19 is a tobacco conveying driving motor, 20 is a tobacco conveying driving roller, 21 is a tobacco conveying driven roller, 22 is a tension adjusting roller, 23 is a control machine case, 24 is a sliding wheel, 25 is a first laser emitter-receiver, 26 is a second laser emitter-receiver, and 27 is a signal receiver. DETAILED DESCRIPTION

[0046] The accompanying drawings are only used for illustrative purposes and should not be construed as limiting the patent; in order to better illustrate the embodiment, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0047] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be said that the two elements are connected internally. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances. The technical solutions of the present application will be further described below in conjunction with the drawings and examples.

[0048] As Figures 1-4As shown in the figure, a tobacco grading analysis research screening line includes a display screen 1, a tobacco conveyor 2 and a tobacco basket 3 arranged on the tobacco conveyor 2; the tobacco conveyor 2 is provided with a tobacco conveying belt 4 for conveying tobacco, and the tobacco conveying belt 4 is provided with a positioning piece 5; the tobacco basket 3 is respectively provided with a near-infrared scanning device 6 and an image recognition device 7, and a partition plate 8 is arranged between the near-infrared scanning device 6 and the image recognition device 7; the partition plate 8 and the tobacco basket 3 are both provided with sensors 9; when the sensors 9 on the tobacco basket 3 and the partition plate 8 sense the positioning piece 5 on the tobacco conveying belt 4, the sensors 9 control the image recognition device 7 and the near-infrared scanning device 6 to scan and recognize the tobacco in sequence, and transmit the grading analysis results to the display screen 1; the near-infrared scanning device 6 and the image recognition device 7 are separated by the partition plate 8, which can prevent the near-infrared scanning device 6 and the image recognition device 7 from affecting each other during work; in addition, the sensors 9 arranged on the partition plate 8 and the tobacco basket 3 can automatically identify the positioning piece 5 on the tobacco conveying belt 4, so that the position of the tobacco can be accurately identified, and the near-infrared scanning device 6 and the image recognition device 7 can be triggered to perform near-infrared scanning and image recognition on the tobacco, so that the tobacco can be more comprehensively detected to obtain accurate data and parameters of the tobacco; since the structure is relatively simple, the production cost is low, and it is suitable for use by manufacturers of different scales, thereby reducing the labor intensity of people and improving the production efficiency.

[0049] As shown in the figure, Figures 5-6 The near-infrared scanning device 6 includes a first mounting positioning shaft 10, a second mounting positioning shaft 11, a near-infrared scanner 12 and a near-infrared scanning probe 13 connected with the display screen 1; the bottom of the near-infrared scanner 12 is provided with a protruding probe hole 14, and the near-infrared scanning probe 13 is arranged in the probe hole 14; the first mounting positioning shaft 10 and the second mounting positioning shaft 11 are arranged horizontally; the two sides of the near-infrared scanner 12 are fixed on the tobacco basket 3 through the first mounting positioning shaft 10 and the second mounting positioning shaft 11; since the near-infrared scanning probe 13 is arranged in the protruding probe hole 14, the tobacco can be better detected; and the near-infrared scanner 12 can be more conveniently arranged in the tobacco basket 3 through the first mounting positioning shaft 10 and the second mounting positioning shaft 11; the sensors 9 on the partition plate 8 and the tobacco basket 3 are both in-place sensors, which can accurately detect the positioning piece 5 on the tobacco conveying belt 4, so that the near-infrared scanning device 6 and the image recognition device 7 can perform near-infrared scanning and image recognition on the tobacco to be detected.

[0050] As shown in the figure, Figure 7As shown in the figure, the image recognition device 7 comprises a light supplement lamp 15 and an industrial camera 16 for shooting the tobacco leaves; the light supplement lamp 15 is arranged at the top of the tobacco leaf basket 3, and the industrial camera 16 is connected with the display screen 1; an adjusting mounting seat 17 is arranged between the adjacent light supplement lamps 15, and the industrial camera 16 is arranged in the adjusting mounting seat 17 in an adjustable height mode; by arranging the adjusting mounting seat 17 between the adjacent light supplement lamps 15, it can be ensured that the industrial camera has sufficient light source when shooting; in actual application, the installation height of the industrial camera 16 can also be adjusted according to the shooting needs, which all belong to the protection scope of the present application.

[0051] As shown in the figure, Figure 8 As shown in the figure, the tobacco conveying machine 2 comprises a tobacco conveying support frame 18, a tobacco conveying driving motor 19, a tobacco conveying driving roller 20 and a tobacco conveying driven roller 21; the tobacco conveying driving roller 20 and the tobacco conveying driven roller 21 are arranged at the two sides of the tobacco conveying support frame 18 respectively, and the tobacco conveying driving roller 20 and the tobacco conveying driven roller 21 are connected through the tobacco conveying belt 4; the tobacco conveying driving motor 19 is connected with the tobacco conveying driving roller 20, and drives the tobacco conveying driving roller 20 through the tobacco conveying driving motor 19, so that the tobacco conveying belt 4 on the tobacco conveying driving roller 20 can drive the tobacco to move forward, which is convenient for the near-infrared scanning device 6 and the image recognition device 7 to detect the tobacco on the tobacco conveying belt 4; wherein, the tobacco conveying support frame 18 is provided with a height-adjustable tension adjusting roller 22, which is pressed on the inner side or the outer side of the tobacco conveying belt 4; through the arrangement of the tension adjusting roller 22, the tension of the tobacco conveying belt 4 can be adjusted, and the installation and dismounting of the tobacco conveying belt 4 are facilitated.

[0052] As shown in the figure, Figures 9-10As shown, in the present application, a control cabinet 23 is arranged at the bottom of the tobacco conveying machine 2, the control cabinet 23 is connected with the display screen 1, the tobacco conveying machine 2, the near-infrared scanning device 6 and the image recognition device 7 respectively, through the arrangement of the control cabinet 23, the display screen 1, the tobacco conveying machine 2, the near-infrared scanning device 6 and the image recognition device 7 can be controlled quickly respectively, so that the emergency braking of each component can be facilitated, in the present application, the display screen 1 is arranged on the tobacco basket 3, in actual application, the display screen 1 can be arranged on the tobacco conveying machine 2 or the tobacco basket 3 according to the use requirement, which are all within the protection scope of the present application, in addition, the sliding wheel 24 is arranged at the bottom of the tobacco conveying machine 2, through the arrangement of the sliding wheel 24, the carrying and moving of the tobacco conveying machine 2 can be facilitated, in addition, the first laser emitter-receiver 25 for detecting the stacking height of the tobacco is arranged at the two ends of the tobacco conveying machine 2 respectively, the second laser emitter-receiver 26 for detecting the length and width of the tobacco is arranged at the middle of the tobacco conveying machine 2, the first laser emitter-receiver 25 and the second laser emitter-receiver 26 are connected with the display screen 1 respectively, since the first laser emitter-receiver 25 is arranged at the two ends of the tobacco conveying machine 2, through the emission of the first laser emitter-receiver 25, the stacking height of the tobacco can be measured quickly whether it is over limit, in actual application, the signal receiver 27 for receiving the signal of the second laser emitter-receiver 26 can be arranged on the tobacco conveying belt 4, through the second laser emitter-receiver 26 and the signal receiver 27, the length and width of the tobacco can be detected, the data of the tobacco can be collected quickly by using the intelligent equipment, the efficiency is improved, and the subsequent tobacco grading can be facilitated to make the referential index.

[0053] In the present application, a tobacco grading analysis research screening method is also disclosed, which comprises the following steps:

[0054] S1, the tobacco is covered on the signal receiver of the tobacco conveying belt, and the end of the tobacco is flush with the positioning piece on the tobacco conveying belt;

[0055] S2, the first laser emitter-receiver at the two ends of the tobacco conveying machine emits to the tobacco on the tobacco conveying belt, so as to determine the stacking height of the tobacco;

[0056] S3, the second laser emitter-receiver on the tobacco conveying machine emits to the tobacco, according to the signal receiving condition of the signal receiver, the length and width of the stacked tobacco are determined;

[0057] S4, the tobacco conveying belt transports the tobacco to the tobacco basket, the in-place sensor on the tobacco basket and the positioning piece on the tobacco conveying belt induct each other, and trigger the image recognition device to recognize the shape of the tobacco, and the stacking shape of the tobacco is shot;

[0058] S5, the tobacco conveying belt transports the tobacco through the isolation plate, the in-place sensor on the isolation plate and the positioning sheet on the tobacco conveying belt induct each other, and trigger the near-infrared scanning device to scan the tobacco and analyze its composition;

[0059] S6, the first laser emitter, the second laser emitter, the image recognition device and the near-infrared scanning device transmit the collected information to the display screen.

[0060] Embodiment

[0061] In this embodiment, when the tobacco needs to be graded and analyzed, the tobacco can be placed on the tobacco conveying belt and made to be flush with the positioning sheet on the tobacco conveying belt. At this time, the tobacco is also placed on the signal receiver of the tobacco conveying belt. When the tobacco conveying belt rotates, the tobacco passes through the first laser emitter. Through the reflection of the first laser emitter, the stacking height of the tobacco can be quickly measured. When the stacking height of the tobacco is tested, the tobacco continues to move forward under the conveying of the tobacco conveying belt and passes through the second laser emitter. The second laser emitter receives the signal through the signal receiver to determine the length and width of the tobacco. At this time, the length, width and stacking height of the tobacco are detected.

[0062] When the tobacco reaches the tobacco basket under the conveying of the tobacco conveying belt, the in-place sensor on the tobacco basket identifies the position of the positioning sheet and controls the image recognition device to recognize the image of the tobacco to obtain the shape data of the tobacco. After the image recognition device recognizes the shape of the tobacco, the tobacco reaches the isolation plate under the conveying of the tobacco conveying belt. At this time, the in-place sensor on the isolation plate senses the positioning sheet on the tobacco conveying belt and controls the near-infrared scanning device to start, so as to perform near-infrared scanning on the tobacco to analyze the composition ratio of various substances in the tobacco and obtain the detection data. Finally, the data and parameters detected by the tobacco are transmitted to the display screen, which is convenient for people to observe the tobacco and draw conclusions on the grading analysis of the tobacco.

[0063] By this way, the tobacco is measured. Compared with the prior art which can only detect one tobacco at a time after the tobacco is placed flat, the present application directly measures the height, length and width of the stacked tobacco, takes a picture for recognition, and then uses the near-infrared scanning device to perform near-infrared scanning analysis. The stacked tobacco can be batch graded, analyzed and screened, which is suitable for different scale manufacturers, reduces the labor intensity of people and improves the production efficiency.

[0064] In the drawings, the position relationship is only used for example description, and cannot be understood as a limitation to the patent; obviously, the above embodiments of the application are only used for clearly illustrating the application, and cannot be used as a limitation to the embodiments of the application. Based on the above description, any modification, equivalent replacement and improvement made by those skilled in the art within the spirit and principle of the application shall be included in the protection scope of the claims of the application.

Claims

1. A tobacco grading analysis research screening line, comprising a display screen, a tobacco conveyor and a tobacco basket arranged on the tobacco conveyor, characterized in that: a tobacco conveying belt for conveying tobacco is arranged on the tobacco conveyor, and the tobacco is flush with positioning pieces on the tobacco conveying belt; the tobacco basket is respectively provided with a near-infrared scanning device and an image recognition device, and a partition plate is arranged between the near-infrared scanning device and the image recognition device; sensors are arranged on the partition plate and the tobacco basket; when the sensors on the partition plate and the tobacco basket sense the positioning pieces on the tobacco conveying belt, the sensors control the image recognition device and the near-infrared scanning device to identify and scan the tobacco in sequence, and transmit the grading analysis results to the display screen; the near-infrared scanning device comprises a first mounting positioning shaft, a second mounting positioning shaft, a near-infrared scanner and a near-infrared scanning probe connected with the display screen; the bottom of the near-infrared scanner is provided with a probe hole protruding outward, and the near-infrared scanning probe is arranged in the probe hole; the first mounting positioning shaft and the second mounting positioning shaft are arranged horizontally; the near-infrared scanner is fixed on the tobacco basket through the first mounting positioning shaft and the second mounting positioning shaft on both sides of the near-infrared scanner; the tobacco conveyor comprises a tobacco conveying support frame, a tobacco conveying drive motor, a tobacco conveying driving roller and a tobacco conveying driven roller; the tobacco conveying driving roller and the tobacco conveying driven roller are arranged on both sides of the tobacco conveying support frame, and the tobacco conveying driving roller and the tobacco conveying driven roller are connected through the tobacco conveying belt; the tobacco conveying drive motor is connected with the tobacco conveying driving roller; both ends of the tobacco conveyor are respectively provided with a first laser emitter for detecting the height limitation of the tobacco stacking height; the middle part of the tobacco conveyor is provided with a second laser emitter for detecting the length and width of the tobacco; the first laser emitter and the second laser emitter are respectively connected with the display screen; when the tobacco conveying belt rotates, the tobacco passes through the first laser emitter, and the stacking height of the tobacco can be quickly measured through the emission of the first laser emitter; when the stacking height of the tobacco is tested, the tobacco continues to move forward under the conveying of the tobacco conveying belt and passes through the second laser emitter; the second laser emitter receives signals through a signal receiver, so as to judge the length and width of the tobacco; at this time, the detection of the length, width and stacking height of the tobacco is completed; when the tobacco reaches the tobacco basket under the conveying of the tobacco conveying belt, the in-place sensor on the tobacco basket identifies the position of the positioning piece and controls the image recognition device to recognize the image of the tobacco, so as to obtain the shape data of the tobacco. The sensors on the partition plate and the tobacco basket are in-place sensors. The image recognition device comprises a fill-in light and an industrial camera for shooting the tobacco; the fill-in light is arranged on the top of the tobacco basket, and the industrial camera is connected with the display screen; adjusting mounting seats are arranged between adjacent fill-in lights, and the industrial camera is arranged in the adjusting mounting seats in an adjustable height mode. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The tobacco grading analytical research screening line of claim 1, wherein: ​ 3. The tobacco grading analytical research screening line of claim 1, wherein: ​ ​ ​ 4. The tobacco grading analytical research screening line of claim 1 wherein: The tobacco conveying support frame is provided with height-adjustable tension adjusting rollers which are pressed against the inner side or the outer side of the tobacco conveying belt.

5. The tobacco grading analytical research screening line of claim 1 wherein: The control cabinet is arranged at the bottom of the tobacco conveying machine and is connected with the display screen, the tobacco conveying machine, the near-infrared scanning device and the image recognition device.

6. The tobacco grading analytical research screening line of claim 1 wherein: The display screen is arranged on the tobacco conveying machine or the tobacco basket, and the bottom of the tobacco conveying machine is provided with sliding wheels.

7. A method of screening for tobacco leaf grading analytical studies, characterized by: The method comprises the following steps: S1, covering the tobacco on the signal receiver of the tobacco conveying belt and aligning the end of the tobacco with the positioning sheet on the tobacco conveying belt; S2, the first laser emitter at both ends of the tobacco conveying machine emits to the tobacco on the tobacco conveying belt to determine the stacking height of the tobacco; S3, the second laser emitter on the tobacco conveying machine emits to the tobacco to determine the length and width of the stacked tobacco according to the signal receiving condition of the signal receiver; S4, the tobacco conveying belt transports the tobacco to the tobacco basket, the in-place sensor on the tobacco basket and the positioning sheet on the tobacco conveying belt are inducted to each other, and the image recognition device is triggered to recognize the shape of the tobacco and take a photo of the stacking shape of the tobacco; S5, the tobacco conveying belt transports the tobacco through the isolation plate, the in-place sensor on the isolation plate and the positioning sheet on the tobacco conveying belt are inducted to each other, and the near-infrared scanning device is triggered to scan the tobacco and analyze the composition of the tobacco; S6, the first laser emitter, the second laser emitter, the image recognition device and the near-infrared scanning device transmit the collected information to the display screen.

Images