A tobacco leaf structure on-line detection device

Abstract

The utility model discloses a tobacco leaf piece structure on -line detection device, include: tobacco leaf piece grabbing mechanism is used for from tobacco leaf production line and grabs tobacco leaf sample, feed mechanism is used for the tobacco leaf sample of the tobacco leaf piece grabbing mechanism and is grabbed to the forward delivery of feed of receiving, scattering mechanism is used for the tobacco leaf sample of the emergence from feed mechanism and carries out longitudinal and transverse scattering, detection mechanism includes detection conveying belt and detection camera, and detection conveying belt import end is used for receiving the tobacco leaf sample that scatters, carries out image acquisition to the tobacco leaf sample of the conveying on detection conveying belt through detection camera, sample backflow mechanism is used for the tobacco leaf sample of detection conveying belt export end and flows back to the conveying to tobacco leaf production line. The utility model discloses compared with prior art has the following advantages: realized the automation of the whole process of tobacco leaf sample grabbing, feed, scattering, detection and backflow, and the tobacco leaf piece structure detection efficiency and detection precision have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of tobacco testing equipment technology, and in particular to an online detection device for tobacco leaf structure. Background Technology

[0002] In the tobacco production process, the detection of tobacco leaf structure is crucial. The structure of tobacco leaves affects the quality of the tobacco, processing techniques, and the final product. Traditional methods for detecting tobacco leaf structure rely heavily on manual operation, which is not only inefficient but also prone to errors due to the subjectivity of manual inspection, failing to accurately and comprehensively detect the structural characteristics of tobacco leaves. Furthermore, some existing testing equipment suffers from complex structures, inconvenient operation, and low detection accuracy, making it difficult to meet the demands of modern tobacco production enterprises for efficient and accurate testing. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online detection device for tobacco leaf structure to achieve efficient and accurate detection of tobacco leaf structure.

[0004] This utility model is achieved through the following technical solution: An online detection device for tobacco leaf structure includes: A tobacco leaf gripping mechanism is used to grab tobacco leaf samples from a tobacco production line. The feeding mechanism has an inlet end that receives tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism and transports the tobacco leaf samples to the outlet end. The dispersing mechanism is used to disperse the tobacco leaf sample coming out of the outlet of the feeding mechanism; The testing facility includes a testing conveyor belt and a testing camera mounted above the testing conveyor belt. The inlet end of the testing conveyor belt is used to receive the broken tobacco leaf samples, and the testing camera captures images of the tobacco leaf samples transported on the testing conveyor belt. The sample return mechanism is used to return tobacco leaf samples exiting the test conveyor belt to the tobacco production line.

[0005] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the dispersing mechanism includes a longitudinal dispersing mechanism and a transverse dispersing mechanism connected in sequence. The longitudinal disintegration mechanism includes a longitudinal disintegration drum that is horizontally and rotatably mounted on a longitudinal disintegration frame. The axial direction of the longitudinal disintegration drum is inclined along the conveying direction of the detection conveyor belt. The inner cavity of the longitudinal disintegration drum is open at both ends. Multiple longitudinal disintegration ribs are distributed circumferentially on the side wall of the inner cavity of the longitudinal disintegration drum. Each longitudinal disintegration rib extends in a spiral shape on the inner side wall of the longitudinal disintegration drum. The transverse dispersing mechanism includes a transverse dispersing roller that is horizontally and rotatably installed above the inlet end of the inspection conveyor belt. The axial direction of the transverse dispersing roller is perpendicular to the conveying direction of the inspection conveyor belt, and multiple fins are provided on the outer side wall of the transverse dispersing roller.

[0006] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the multiple fins on the outer wall of the transverse dispersing roller are distributed in multiple circumferential groups, each fin group including several fins distributed at intervals along the axial direction, and the fins of adjacent fin groups are arranged in an alternating manner.

[0007] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the outlet end of the longitudinal dispersing roller is provided with a guide chute, through which the tobacco leaf sample inside the longitudinal dispersing roller is guided to the transverse dispersing roller via the inclined and downward-extending guide chute.

[0008] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the detection camera is installed in a camera mounting cabinet, which is equipped with a mounting frame. The detection camera is suspended on the mounting frame by a cross-shaped slide table. The cross-shaped slide table drives the detection camera to move in both the horizontal and vertical directions. The horizontal movement direction of the detection camera is the same as the conveying direction of the detection conveyor belt.

[0009] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the tobacco leaf gripping mechanism includes a gantry spanning the tobacco production line, a first linear slide extending horizontally on the gantry, a second linear slide extending vertically on the slider of the first linear slide, and a gripper on the slider of the second linear slide. The gripper grips tobacco leaves from the tobacco production line as tobacco leaf samples.

[0010] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the gripper is a pneumatic gripper, and a receiving plate is provided below the gripper, which extends along the horizontal movement direction of the gripper.

[0011] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the feeding mechanism includes a vibrating trough arranged parallel to the tobacco production line. The vibrating trough extends along an inclined direction with a high inlet end and a low outlet end. The inlet end of the vibrating trough is used to receive tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism, and the outlet end of the vibrating trough extends into the inner cavity of the inlet end of the longitudinal dispersing roller.

[0012] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the sample return mechanism includes a sample return collection belt and a sample return lifting belt. The sample return collection belt is perpendicular to the conveying direction of the detection conveyor belt. The inlet end of the sample return collection belt is connected to the outlet end of the detection conveyor belt. The lower end of the sample return lifting belt is connected to the outlet end of the sample return collection belt. The higher end of the sample return lifting belt is located above the tobacco production line.

[0013] As a preferred embodiment of the above-mentioned online detection device for tobacco leaf structure, the feeding mechanism, the dispersing mechanism, and the detection mechanism are arranged sequentially along a direction parallel to the tobacco production line.

[0014] This invention has the following advantages over the prior art: This utility model provides an online tobacco leaf structure detection device. By incorporating an online tobacco leaf gripping mechanism, a feeding mechanism, a dispersing mechanism, a detection mechanism, and a sample return mechanism, it automates the entire process from tobacco leaf sample gripping, feeding, dispersing, detection, and return, significantly improving detection efficiency and accuracy. The detection mechanism uses a camera to acquire images of the tobacco leaf samples, avoiding the subjectivity and errors inherent in manual detection, and enabling more accurate acquisition of structural information of the tobacco leaves, providing reliable data support for tobacco quality assessment. The sample return mechanism enables the recycling and reuse of tobacco leaf samples, reducing resource waste and meeting environmental and economic requirements. Furthermore, the online tobacco leaf structure detection device provided by this utility model features a rational layout of mechanisms that work closely together to form a highly efficient and accurate detection system, solving the problems of complex structure, inconvenient operation, and low detection accuracy of existing detection equipment, thus improving detection efficiency and accuracy. Attached Figure Description

[0015] Figure 1 This is the overall layout diagram of this utility model.

[0016] Figure 2 This is a perspective view of the tobacco leaf gripping mechanism of this utility model.

[0017] Figure 3 This is a perspective view of the gripper of this utility model.

[0018] Figure 4 This is a perspective view of the feeding mechanism of this utility model.

[0019] Figure 5 This is a perspective view of the longitudinal disintegration mechanism of this utility model.

[0020] Figure 6 This is a three-dimensional view of the internal structure of the longitudinal dispersing roller of this utility model.

[0021] Figure 7 This is a perspective view of the transverse dispersing mechanism of this utility model.

[0022] Figure 8 This is a perspective view of the installation structure of the detection camera of this utility model.

[0023] Figure 9 This is a three-dimensional view of the sample reflux collection belt of this utility model.

[0024] Figure 10 This is a three-dimensional view of the sample reflux lifting belt of this utility model.

[0025] The diagram is labeled as follows: 1. Tobacco leaf gripping mechanism; 2. Tobacco leaf production line; 3. Feeding mechanism; 4. Detection mechanism; 5. Detection conveyor belt; 6. Detection camera; 7. Gantry frame; 8. First linear slide; 9. Second linear slide; 10. Pneumatic gripper; 11. Handle; 12. Vibrating groove; 13. Straight vibration motor; 14. Longitudinal dispersing mechanism; 15. Transverse dispersing mechanism; 16. Longitudinal dispersing frame; 17. Longitudinal dispersing roller; 18. Longitudinal speed regulating motor; 19. Guide chute; 20. Longitudinal dispersing ribs; 21. Transverse dispersing roller; 22. Fin; 23. Camera mounting cabinet; 24. Horizontal slide; 25. Vertical slide; 26. Camera bracket; 27. Adjustment knob; 28. Lead screw; 29. ​​Guide rod; 30. Sample return collection belt; 31. Sample return lifting belt; 32. Baffle plate; 33. Receiving tray; 34. Transverse speed regulating motor. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0027] See Figures 1 to 10 This embodiment discloses an online detection device for tobacco leaf structure, comprising: Tobacco leaf gripping mechanism 1 is used to grip tobacco leaf samples from tobacco production line 2; The feeding mechanism 3 has an inlet end for receiving tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism 1 and transporting the tobacco leaf samples to the outlet end. The dispersing mechanism is used to disperse the tobacco leaf sample coming out of the outlet of the feeding mechanism 3; The testing mechanism 4 includes a testing conveyor belt 5 and a testing camera 6 installed above the testing conveyor belt 5. The inlet end of the testing conveyor belt 5 is used to receive the broken tobacco leaf samples, and the testing camera 6 collects images of the tobacco leaf samples conveyed on the testing conveyor belt 5. The sample return mechanism is used to return the tobacco leaf samples coming out of the outlet end of the test conveyor belt 5 to the tobacco production line 2.

[0028] The feeding mechanism 3, the dispersing mechanism, and the testing mechanism 4 are arranged in sequence along a direction parallel to the tobacco production line 2, and the feeding mechanism 3, the dispersing mechanism, and the testing mechanism 4 are all located on one side of the tobacco production line 2.

[0029] The tobacco leaf gripping mechanism 1 includes a gantry frame 7 spanning the tobacco production line 2. A horizontally extending first linear slide 8 is mounted on the gantry frame 7. A vertically extending second linear slide 9 is mounted on the slider of the first linear slide 8. A gripper, specifically a pneumatic gripper 10, is mounted on the slider of the second linear slide 9. Handles 11 are installed on the two gripping fingers of the pneumatic gripper 10. The pneumatic gripper 10 drives the two handles 11 to automatically open and close, thereby gripping tobacco leaves from the tobacco production line 2 as samples. A receiving plate 33 is located below the gripper, extending along the horizontal movement direction of the gripper to prevent tobacco leaves from accidentally falling to the ground during the movement from the tobacco production line 2 to the feeding mechanism 3. The sliding direction of the slider of the first linear slide 8 is perpendicular to the conveying direction on the tobacco production line 2. The first linear slide 8 drives the second linear slide 9 and the gripper mounted thereon to move horizontally, while the second linear slide 9 drives the gripper to move vertically. The gripper picks up tobacco leaves from the tobacco production line 2 as a sample, moves them horizontally to the top of the inlet of the feeding mechanism 3, and then releases them, thus picking up the tobacco leaves from the tobacco production line 2 and feeding them into the feeding mechanism 3.

[0030] The feeding mechanism 3 includes a vibrating trough 12 arranged parallel to the tobacco production line 2. The vibrating trough 12 extends along an inclined direction with a higher inlet end and a lower outlet end. The inlet end of the vibrating trough 12 is used to receive tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism 1, and the outlet end of the vibrating trough 12 extends into the inner cavity of the inlet end of the longitudinal dispersing roller 17. The vibrating trough 12 is driven to vibrate by a linear vibrating motor 13. Under the action of vibration, the tobacco leaf samples move in the vibrating trough 12 according to a preset trajectory, realizing orderly feeding and providing a stable sample supply for subsequent dispersing processing.

[0031] The disintegration mechanism includes a longitudinal disintegration mechanism 14 and a transverse disintegration mechanism 15 connected in sequence.

[0032] The longitudinal dispersing mechanism 14 includes a longitudinal dispersing roller 17 horizontally and rotatably mounted on a longitudinal dispersing frame 16. The longitudinal dispersing roller 17 is driven to rotate by a longitudinal speed-regulating motor 18. The axial direction of the longitudinal dispersing roller 17 is inclined along the conveying direction of the detection conveyor belt 5. The inner cavity of the longitudinal dispersing roller 17 is open at both ends. The outlet end of the longitudinal dispersing roller 17 is provided with a guide chute 19. The tobacco leaf sample in the inner cavity of the longitudinal dispersing roller 17 is guided to the transverse dispersing roller 21 through the inclined and downward extending guide chute 19. There are multiple longitudinal dispersing ribs 20 distributed circumferentially on the inner wall of the longitudinal dispersing roller 17. The cross-sectional shape of the longitudinal dispersing ribs 20 is semi-circular, and each longitudinal dispersing rib 20 extends spirally on the inner wall of the longitudinal dispersing roller 17. As the longitudinal dispersing roller 17 rotates, the tobacco leaves move along the spiral direction of the longitudinal dispersing ribs 20, which extend in a spiral shape. When the tobacco leaves move to a high position with the longitudinal dispersing ribs 20, they will form a projectile motion. Since different tobacco leaves have different masses, they are thrown at different distances, thus dispersing them. This process is repeated to longitudinally disperse the tobacco leaf sample, making the tobacco leaves initially dispersed, which is convenient for subsequent more comprehensive testing.

[0033] The transverse dispersing mechanism 15 includes a transverse dispersing roller 21 horizontally rotatably mounted above the inlet end of the detection conveyor belt 5. The axial direction of the transverse dispersing roller 21 is perpendicular to the conveying direction of the detection conveyor belt 5. Multiple fins 22 are provided on the outer wall of the transverse dispersing roller 21. The multiple fins 22 on the outer wall of the transverse dispersing roller 21 are distributed circumferentially in multiple groups of fins 22. Each group of fins 22 includes several fins 22 spaced apart axially, with the fins 22 of adjacent groups of fins 22 arranged alternately. The tobacco leaf sample, after longitudinal dispersing, falls onto the transverse dispersing roller 21 through the guide chute 19. Driven by the transverse speed-regulating motor 34, the transverse dispersing roller 21 rotates, relying on the multiple fins 22 on its surface to transversely disperse the tobacco leaf sample, further fully dispersing the tobacco leaves and exposing the leaf structure, thus improving the accuracy of subsequent detection. The speed-regulating motors of the two dispersing rollers can independently adjust their speeds to adapt to the dispersing requirements of tobacco leaf samples of different varieties and conditions.

[0034] In the testing mechanism 4, the testing camera 6 is installed inside the camera mounting cabinet 23, which spans across the testing conveyor belt 5 and is supported on the ground by four support columns. The camera mounting cabinet 23 contains a mounting frame, on which the testing camera 6 is suspended by a cross-shaped slide. The cross-shaped slide moves the testing camera 6 horizontally and vertically, allowing for adjustments to its horizontal and vertical positions within a certain range to ensure testing accuracy. The horizontal movement direction of the testing camera 6 is the same as the conveying direction of the testing conveyor belt 5. The cross-shaped slide includes a horizontal slide 24 and a vertical slide 25 arranged in a cross shape. The vertical slide 25 is mounted on a camera bracket 26, which is fixed to the mounting frame. The horizontal slide 24 is mounted on the slider of the vertical slide 25, and the testing camera 6 is mounted on the slider of the horizontal slide 24. Both the horizontal slide 24 and the vertical slide 25 can be manually adjustable slides, which rely on the screw and nut mechanism to drive the corresponding slider to slide. The guide rods 29 located on both sides of the screw 28 guide and limit the linear movement of the slider. An adjustment knob 27 is set at one end of the screw 28 of the screw and nut mechanism. By rotating the adjustment knob 27, the corresponding slider is driven to slide, thereby adjusting the position of the detection camera 6.

[0035] The inspection conveyor belt 5 is a white flat belt. A speed-regulating motor drives and controls the conveyor belt 5's movement speed to ensure the tobacco leaf samples maintain a suitable speed within the field of view of the inspection camera 6. This guarantees the clarity and completeness of image acquisition, providing high-quality image data for subsequent leaf structure analysis. The inspection camera 6 is perpendicular to the inspection conveyor belt 5, capturing images of the tobacco leaf samples from a vertical direction to obtain comprehensive leaf image information.

[0036] The sample return mechanism includes a sample return collection belt 30 and a sample return lifting belt 31. The sample return collection belt 30 is perpendicular to the conveying direction of the detection conveyor belt 5. The inlet end of the sample return collection belt 30 is connected to the outlet end of the detection conveyor belt 5. The lower end of the sample return lifting belt 31 is connected to the outlet end of the sample return collection belt 30, and the higher end of the sample return lifting belt 31 is located above the tobacco production line 2. Multiple baffles 32 are distributed at intervals on the sample return lifting belt 31. The sample return collection belt 30 is used to collect the tested tobacco leaf samples and convey them to the inlet end of the sample return lifting belt 31. Then, the tested tobacco leaf samples are returned to the tobacco production line 2 via the sample return lifting belt 31, forming a complete sample testing and conveying cycle.

[0037] The working process of the online tobacco leaf structure detection device provided in this embodiment is as follows: During operation, the tobacco leaf gripping mechanism 1 operates. First, the first linear slide 8 drives the gripper to move horizontally above the tobacco production line 2. Then, the second linear slide 9 drives the gripper to move downward, gripping tobacco leaves from the production line 2 as samples. The second linear slide 9 then drives the gripper to lift, and the first linear slide 8 drives the gripper to move horizontally above the inlet of the vibrating trough 12 before releasing it. The tobacco leaf samples fall into the vibrating trough 12. The vibrating trough 12 is driven to vibrate by the linear vibration motor 13, and the vibrating trough 12 feeds the tobacco leaf samples into the longitudinal dispersing roller 17 in an orderly manner. As the longitudinal dispersing roller 17 rotates, the tobacco leaf samples are longitudinally dispersed and conveyed forward by the action of multiple longitudinal dispersing ribs 20 inside the longitudinal dispersing roller 17. After longitudinal dispersing, the tobacco leaf samples fall onto the transverse dispersing roller 21 through the guide chute 19. As the transverse dispersing roller 21 rotates, the tobacco leaf samples are laterally dispersed by multiple fins 22 on the surface of the transverse dispersing roller 21. After being horizontally dispersed, the tobacco leaf samples fall onto the detection conveyor belt 5 below, which transports them from back to front to the detection area. The detection camera 6 captures images of the tobacco leaf samples on the detection conveyor belt 5, and the acquired image data is analyzed and processed by the subsequent control system. After detection, the tobacco leaf samples fall onto the sample return collection belt 30 via the detection conveyor belt 5, and are then transported to the sample return lifting belt 31. Finally, the sample return lifting belt 31 returns the detected tobacco leaf samples to the tobacco production line 2, forming a complete sample detection and transport cycle.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online detection device for tobacco leaf structure, characterized in that, include: A tobacco leaf gripping mechanism (1) is used to grip tobacco leaf samples from the tobacco production line (2); The feeding mechanism (3) has an inlet end for receiving tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism (1) and transporting the tobacco leaf samples to the outlet end. The dispersing mechanism is used to disperse the tobacco leaf sample coming out of the outlet of the feeding mechanism (3); The testing mechanism (4) includes a testing conveyor belt (5) and a testing camera (6) set above the testing conveyor belt (5). The inlet end of the testing conveyor belt (5) is used to receive the broken tobacco leaf samples. The testing camera (6) collects images of the tobacco leaf samples conveyed on the testing conveyor belt (5). The sample return mechanism is used to return the tobacco leaf samples coming out of the outlet of the test conveyor belt (5) to the tobacco production line (2).

2. The online detection device for tobacco leaf structure as described in claim 1, characterized in that: The disintegration mechanism includes a longitudinal disintegration mechanism (14) and a transverse disintegration mechanism (15) connected in sequence. The longitudinal disintegration mechanism (14) includes a longitudinal disintegration roller (17) that is horizontally and rotatably mounted on a longitudinal disintegration frame (16). The longitudinal disintegration roller (17) is inclined along the conveying direction of the detection conveyor belt (5). The inner cavity of the longitudinal disintegration roller (17) is open at both ends. Multiple longitudinal disintegration ribs (20) are distributed circumferentially on the inner wall of the longitudinal disintegration roller (17). Each longitudinal disintegration rib (20) extends in a spiral shape on the inner wall of the longitudinal disintegration roller (17). The transverse dispersing mechanism (15) includes a transverse dispersing roller (21) that is horizontally rotated and installed above the inlet end of the inspection conveyor belt (5). The axial direction of the transverse dispersing roller (21) is perpendicular to the conveying direction of the inspection conveyor belt (5). Multiple fins (22) are provided on the outer side wall of the transverse dispersing roller (21).

3. The online detection device for tobacco leaf structure as described in claim 2, characterized in that: The multiple fins (22) on the outer wall of the transverse dispersing roller (21) are distributed in multiple groups of fins (22) along the circumferential direction. Each group of fins (22) includes several fins (22) distributed at intervals along the axial direction. The fins (22) of adjacent groups of fins (22) are arranged in an alternating manner.

4. The online detection device for tobacco leaf structure as described in claim 2, characterized in that: The outlet end of the longitudinal dispersing roller (17) is provided with a guide groove (19), through which the tobacco leaf sample inside the longitudinal dispersing roller (17) is introduced to the transverse dispersing roller (21) by the inclined downward extending guide groove (19).

5. The online detection device for tobacco leaf structure as described in claim 1, characterized in that: The detection camera (6) is installed in the camera mounting cabinet (23). The camera mounting cabinet (23) is equipped with a mounting frame. The detection camera (6) is suspended on the mounting frame by a cross-shaped slide table. The cross-shaped slide table drives the detection camera (6) to move in the horizontal and vertical directions. The horizontal movement direction of the detection camera (6) is the same as the conveying direction of the detection conveyor belt (5).

6. The online detection device for tobacco leaf structure as described in claim 1, characterized in that: The tobacco leaf gripping mechanism (1) includes a gantry (7) spanning the tobacco production line (2), a first linear slide (8) extending horizontally on the gantry (7), a second linear slide (9) extending vertically on the slider of the first linear slide (8), and a gripper on the slider of the second linear slide (9). The gripper grips tobacco leaves from the tobacco production line (2) as tobacco leaf samples.

7. The online detection device for tobacco leaf structure as described in claim 6, characterized in that: The gripper is a pneumatic gripper (10), and a receiving plate (33) is provided below the gripper. The receiving plate (33) extends along the horizontal movement direction of the gripper.

8. The online detection device for tobacco leaf structure as described in claim 2, characterized in that: The feeding mechanism (3) includes a vibrating trough (12) arranged side by side with the tobacco production line (2). The vibrating trough (12) extends along an inclined direction with a high inlet end and a low outlet end. The inlet end of the vibrating trough (12) is used to receive tobacco leaf samples grabbed by the tobacco leaf grabbing mechanism (1). The outlet end of the vibrating trough (12) extends into the inner cavity of the inlet end of the longitudinal dispersing roller (17).

9. The online detection device for tobacco leaf structure as described in claim 2, characterized in that: The sample return mechanism includes a sample return collection belt (30) and a sample return lifting belt (31). The sample return collection belt (30) is perpendicular to the conveying direction of the detection conveyor belt (5). The inlet end of the sample return collection belt (30) is connected to the outlet end of the detection conveyor belt (5). The lower end of the sample return lifting belt (31) is connected to the outlet end of the sample return collection belt (30). The higher end of the sample return lifting belt (31) is located above the tobacco production line (2).

10. The online detection device for tobacco leaf structure as described in claim 1, characterized in that: The feeding mechanism (3), the dispersing mechanism, and the testing mechanism (4) are arranged in sequence along a direction parallel to the tobacco production line (2).

Images