Small sample grain detection device based on industrial vision

Abstract

The invention discloses a small sample grain detection device based on industrial vision, and belongs to the technical field of agricultural product quality detection. Supporting legs are fixedly connected to four corners of the bottom end of a top seat. By arranging the centrifugal dispersion mechanism, a driving motor can be controlled by a controller to drive a dispersion disc to rotate, materials can be uniformly dispersed to the edge of a disc body without overlapping through the matching of convex blocks and convex edges, subsequent multi-angle imaging is facilitated, and meanwhile, by arranging a mode of combining a lifting mechanism and a transmission mechanism, the material dispersion efficiency is improved. The first bevel gear can rotate around the axis of the first bevel gear while ascending and descending, industrial cameras fixed to the bottom wall of the first bevel gear and the side wall of the installation disc are driven to conduct multi-angle and multi-height shooting, and therefore all-dimensional image collection of grains at the edge of the dispersion disc is achieved, and limitation of traditional single-view-angle imaging is overcome; and the detection precision and reliability of the three-dimensional shape and the surface flaws of the small sample grains are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural product quality testing technology, specifically to a small-sample grain testing device based on industrial vision. Background Technology

[0002] In crop breeding, a small number of seeds need to be genotyped or phenotypically analyzed (e.g., for disease resistance and nutritional components) to screen for superior traits and accelerate the breeding process. Also, a small number of grains may carry fungi (e.g., Aspergillus flavus), insect eggs, or pathogens. In such cases, the grains can be inspected. Early detection can prevent the spread of contamination, avoid toxins (e.g., aflatoxin) from entering the processing chain, and ensure food safety.

[0003] Existing small-sample grain detection devices mostly use conveyor belt or vibratory feeder feeding mechanisms in actual use, combined with top cameras for imaging. The imaging is relatively simple, usually only shooting from a single perspective, and cannot fully obtain information such as the three-dimensional shape and side defects of the grains. This can easily affect the detection accuracy and usage effect to a certain extent. Therefore, there is an urgent need to improve the technology of the structure of small-sample grain detection devices to improve this equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a small-sample grain detection device based on industrial vision. By setting up a centrifugal dispersion mechanism, the material can be uniformly and non-overlappingly dispersed to the edge of the disk, which is conducive to subsequent multi-angle imaging. At the same time, by setting up a combination of lifting mechanism and transmission mechanism, the first bevel gear can rotate around its own axis while lifting, driving the industrial camera fixed on its bottom wall and the side wall of the mounting disk to take pictures from multiple angles and heights. This enables omnidirectional image acquisition of grains at the edge of the dispersion disk, overcomes the limitations of traditional single-view imaging, and significantly improves the detection accuracy and reliability of the three-dimensional morphology and surface defects of small-sample grains, thereby solving the problems mentioned in the background art in the current market.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a small sample grain detection device based on industrial vision, comprising a top base, support legs fixedly connected to the four corners of the bottom end of the top base, a connecting plate fixedly connected between the support legs, the connecting plate being located at the bottom of the top base, a vibrating discharge mechanism provided at the top of the top base, the vibrating discharge mechanism being able to evenly shake off the material, a mounting frame and a chamber provided at the top of the connecting plate, one end of the mounting frame being fixedly connected to the support legs, the other end of the mounting frame being connected to the chamber, a chamber being embedded at the outer end of the chamber, a material feeding channel provided on the side of the top of the top base near the vibrating discharge mechanism, a material feeding pipe connected to the bottom end of the material feeding channel, and the material feeding pipe extending into the interior of the chamber; The chamber contains a dispersion disc, with a backlight plate fixedly connected to its bottom. A centrifugal dispersion mechanism is also located inside the dispersion disc, allowing materials to fall evenly and without contact onto its edge. An annular disc is also present inside the chamber, and a lifting mechanism drives its longitudinal movement. A mounting plate is rotatably connected inside the annular disc, with a first bevel gear fixedly connected to its top. A funnel disc is fixedly connected to the top of the first bevel gear, located outside the feed pipe. A transmission mechanism inside the chamber drives the first bevel gear to rotate. Multiple LED beads are evenly embedded at the bottom of the first bevel gear. Industrial cameras are located on the bottom wall of the first bevel gear and the side wall of the mounting plate. A material outlet is located on the side of the chamber.

[0006] Preferably, a fixed foot is fixedly connected to the top of the top seat, a limit frame is fixedly connected to the inner end of the fixed foot, a vibrating disc is slidably connected inside the limit frame, a damping spring is fixedly connected to the bottom end of the vibrating disc, and a vibration motor is mounted on the bottom end of the vibrating disc.

[0007] Preferably, a drive motor is mounted on the bottom of the cabin, and a transmission shaft is fixedly connected to the output end of the drive motor. The top end of the transmission shaft is connected to a dispersing disc, and a protrusion is fixedly connected to the middle of the top end of the dispersing disc. A protruding ridge is provided on the outer end of the protrusion.

[0008] Preferably, the protruding ridge is arranged in a spiral outward radial configuration, and the height of the protruding ridge gradually decreases from top to bottom.

[0009] Preferably, a brush plate is fixedly connected to the bottom end of the backlight panel, and the bottom end of the chamber is inclined downwards towards the material outlet.

[0010] Preferably, the left and right sides of the cabin are provided with sliding grooves, and the two ends of the annular disk are fixedly connected to sliders. The sliders are slidably connected in the sliding grooves. A first threaded rod is rotatably connected inside the left sliding groove of the cabin, and a second threaded rod is rotatably connected inside the right sliding groove of the cabin. The first and second threaded rods are both threaded through the sliders at corresponding positions. The first threaded rod extends to the outside of the cabin and forms a rotatable connection with the cabin. A servo motor is fixedly connected to the bottom end of the first threaded rod. The servo motor is mounted on a connecting plate. A drive wheel is fixedly connected to the outer end of the first threaded rod. The second threaded rod extends to the outside of the cabin and forms a rotatable connection with the connecting plate. A driven wheel is fixedly connected to the outer end of the second threaded rod. The drive wheel and the driven wheel are both located at the bottom of the cabin. A transmission belt is sleeved on the outside of the drive wheel and the driven wheel.

[0011] Preferably, the dimensions of the groove and the slider are matched, and a polished layer is provided at the contact point between the groove and the slider.

[0012] Preferably, the first threaded rod and the second threaded rod rotate in the same direction, and the threads engraved on the outer ends of the first threaded rod and the second threaded rod have the same direction.

[0013] Preferably, the outer end of the first bevel gear is meshed with a second bevel gear, the middle part of the second bevel gear is fixedly connected to a connecting shaft, the other end of the connecting shaft is fixedly connected to a cylindrical gear, the cylindrical gear is fixedly connected to the annular disk through a support rod, and a rack is fixedly connected to the inner wall of the cabin, the rack and the cylindrical gear forming a meshing connection.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, by setting up a centrifugal dispersion mechanism, allows the drive motor to rotate the dispersion disk via a controller. The cooperation of the protrusions and ridges enables the material to be uniformly and non-overlappingly dispersed to the edge of the disk, facilitating subsequent multi-angle imaging. Simultaneously, by combining a lifting mechanism with a transmission mechanism, the first bevel gear can rotate around its own axis while lifting, driving the industrial camera fixed on its bottom wall and the side wall of the mounting disk to perform multi-angle and multi-height shooting. This achieves omnidirectional image acquisition of grains at the edge of the dispersion disk, overcoming the limitations of traditional single-view imaging and significantly improving the detection accuracy and reliability of the three-dimensional morphology and surface defects of small sample grains.

[0015] This invention uses a drive motor to rotate the transmission shaft and the dispersing disc. By utilizing the central protrusion and the spirally radiating convex ridges on its outer side, centrifugal force is applied to the grains falling from the feed pipe, guiding them to disperse evenly outwards. The spirally radiating ridges smoothly guide the grains to move outwards, preventing them from accumulating in the central area. The gradually decreasing height design from top to bottom provides gradual guidance and damping for the grains, preventing them from bouncing or rolling randomly during movement, further ensuring a stable and uniform distribution of the grains on the dispersing disc.

[0016] This invention controls a servo motor via a controller. The servo motor drives the first threaded rod to rotate, and through the driving wheel, transmission belt, and driven wheel, it synchronously drives the second threaded rod to rotate in the same direction. This allows the slider meshing with the two threaded rods to synchronously and smoothly drive the annular disk and the imaging component mounted on it to rise and fall vertically along the slide. As the annular disk rises and falls, it drives the cylindrical gear to move together, causing the cylindrical gear to roll along the rack fixed to the inner wall of the chamber. This, in turn, drives the second bevel gear to rotate via the connecting shaft, which in turn drives the first bevel gear meshing with it to rotate around its axis. This allows the industrial camera to change the shooting height while also rotating circumferentially around the grain to capture images, thus completing multi-dimensional image acquisition without an additional drive source, simplifying the structure and reducing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the cabin of the present invention; Figure 2 This is a schematic diagram of the transmission mechanism structure of the present invention; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the annular disk of the present invention; Figure 4 For the present invention Figure 2 A magnified view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 6 For the present invention Figure 3 A magnified schematic diagram of the structure at point C.

[0018] In the diagram: 1. Top seat; 2. Support leg; 3. Connecting plate; 4. Fixed foot; 5. Limiting frame; 6. Vibrating disc; 7. Damping spring; 8. Vibrating motor; 9. Mounting frame; 10. Cabin; 11. Controller; 12. Feeding channel; 13. Feeding pipe; 14. Drive motor; 15. Transmission shaft; 16. Dispersing disc; 17. Protrusion; 18. Protruding ridge; 19. Backlight panel; 20. Brush plate; 21. Annular disc; 22. Slide groove; 23. Slider; 24. First threaded rod; 25. Servo motor; 26. Second threaded rod; 27. Driving wheel; 28. Driven wheel; 29. ​​Transmission belt; 30. Mounting disc; 31. First bevel gear; 32. Second bevel gear; 33. Connecting shaft; 34. Cylindrical gear; 35. Rack; 36. Funnel disc; 37. LED beads; 38. Industrial camera; 39. Material outlet. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Please see Figures 1 to 6The present invention provides a technical solution: a small sample grain detection device based on industrial vision, including a top seat 1, with support legs 2 fixedly connected to the four corners of the bottom end of the top seat 1, and a connecting plate 3 fixedly connected between the support legs 2. The connecting plate 3 is located at the bottom of the top seat 1, and a vibrating discharge mechanism is provided on the top of the top seat 1. The vibrating discharge mechanism can shake the material evenly. The top of the connecting plate 3 is provided with a mounting frame 9 and a chamber 10. One end of the mounting frame 9 is fixedly connected to the support legs 2, and the other end of the mounting frame 9 is connected to the chamber 10. The outer end of the chamber 10 is embedded with a chamber 10. A material feeding channel 12 is provided on the side of the top of the top seat 1 near the vibrating discharge mechanism. The bottom end of the material feeding channel 12 is connected to a material feeding pipe 13, which extends into the interior of the chamber 10. The interior of the chamber 10 is equipped with a dispersion plate 16, and a backlight plate 19 is fixedly connected to the bottom of the dispersion plate 16. The dispersion plate 16 is equipped with a centrifugal dispersion mechanism, which can evenly and non-contactly drop the material into the edge of the dispersion plate 16. The chamber 10 is equipped with an annular plate 21, and a lifting mechanism is provided inside the chamber 10 to drive the annular plate 21 to move longitudinally. The annular plate 21 is rotatably connected to the interior of the mounting plate 30. The top of the mounting plate 30 is fixedly connected to a first bevel gear 31, and the top of the first bevel gear 31 is fixedly connected to a funnel plate 36. The funnel plate 36 is located outside the feed pipe 13. The chamber 10 is equipped with a transmission mechanism to drive the first bevel gear 31 to rotate. Multiple LED beads 37 are evenly embedded at the bottom of the first bevel gear 31. Industrial cameras 38 are provided on the bottom wall of the first bevel gear 31 and the side wall of the mounting plate 30. A material outlet 39 is opened at the side of the chamber 10.

[0021] By setting up a centrifugal dispersion mechanism, the controller 11 can control the drive motor 14 to drive the dispersion disk 16 to rotate. Through the cooperation of the protrusion 17 and the protrusion 18, the material can be evenly and non-overlappingly dispersed to the edge of the disk, which is conducive to subsequent multi-angle imaging. At the same time, by setting up a combination of lifting mechanism and transmission mechanism, the first bevel gear 31 can rotate around its own axis while lifting, driving the industrial camera 38 fixed on its bottom wall and the side wall of the mounting disk 30 to take pictures from multiple angles and heights. This enables the acquisition of all-round images of the grains at the edge of the dispersion disk 16, overcoming the limitations of traditional single-view imaging and significantly improving the detection accuracy and reliability of the three-dimensional morphology and surface defects of small sample grains.

[0022] Please see Figures 1 to 3The top of the top seat 1 is fixedly connected to a fixed foot 4. The inner end of the fixed foot 4 is fixedly connected to a limit frame 5. The inside of the limit frame 5 is slidably connected to a vibrating plate 6. The bottom end of the vibrating plate 6 is fixedly connected to a damping spring 7. The bottom end of the vibrating plate 6 is equipped with a vibration motor 8. The fixed foot 4 and the limit frame 5 provide stable installation and precise limit guidance for the vibrating plate 6. With the damping spring 7 and the vibration motor 8, a small batch of grain material can be continuously and evenly dispersed and shaken into the feeding channel 12, effectively avoiding congestion or overlap caused by too much material falling at one time.

[0023] A drive motor 14 is mounted on the bottom of the chamber 10. The output end of the drive motor 14 is fixedly connected to a transmission shaft 15. The top end of the transmission shaft 15 is connected to a dispersing disc 16. A protrusion 17 is fixedly connected to the middle of the top end of the dispersing disc 16. A protruding ridge 18 is provided on the outer end of the protrusion 17. The fixed foot 4 and the limiting frame 5 provide stable installation and precise limiting guidance for the vibrating disc 6. With the damping spring 7 and the vibration motor 8, a small batch of grain material can be continuously and evenly dispersed and shaken into the feeding channel 12, effectively avoiding congestion or overlap caused by too much material falling at once.

[0024] Please see Figure 1 and Figure 3 The protruding ridge 18 is arranged in a spiral outward radiation pattern, and the height of the protruding ridge 18 gradually decreases from top to bottom. The bottom end of the backlight plate 19 is fixedly connected to the brush plate 20. The bottom end of the chamber 10 is inclined downward towards the material outlet 39. By setting the bottom end of the chamber 10 towards the material outlet 39 to be inclined downward, gravity is used to realize the automatic collection and rapid discharge of grains and impurities after detection, which facilitates cleaning and sample recovery and improves the continuous operation efficiency of the device.

[0025] Please see Figures 1 to 3 The left and right sides of the cabin 10 are provided with sliding grooves 22. The two ends of the annular disk 21 are fixedly connected to sliders 23, which are slidably connected in the sliding grooves 22. The left sliding groove 22 inside the cabin 10 is rotatably connected to a first threaded rod 24, and the right sliding groove 22 inside the cabin 10 is rotatably connected to a second threaded rod 26. The first threaded rod 24 and the second threaded rod 26 are both threaded through the sliders 23 at the corresponding positions. The first threaded rod 24 extends to the outside of the cabin 10 and forms a rotatable connection with the cabin 10. The bottom end of the first threaded rod 24 is fixedly connected to a servo motor 25, which is mounted on the connecting plate 3. The outer end of the first threaded rod 24 is fixedly connected to a drive wheel 27. The second threaded rod 26 extends to the outside of the cabin 10 and forms a rotatable connection with the connecting plate 3. The outer end of the second threaded rod 26 is fixedly connected to a driven wheel 28. The drive wheel 27 and the driven wheel 28 are both located at the bottom of the cabin 10. The drive wheel 27 and the driven wheel 28 are sleeved with a transmission belt 29.

[0026] The controller 11 controls the servo motor 25 to work. The servo motor 25 drives the first threaded rod 24 to rotate, and through the driving wheel 27, the transmission belt 29 and the driven wheel 28, it drives the second threaded rod 26 to rotate in the same direction. This allows the slider 23, which meshes with the two threaded rods, to synchronously and smoothly drive the annular disk 21 and the shooting component mounted on it to rise and fall vertically along the slide groove 22.

[0027] Please see Figures 1 to 5 The dimensions of the slide groove 22 and the slider 23 are matched. A polished layer is provided at the contact point between the slide groove 22 and the slider 23. The first threaded rod 24 and the second threaded rod 26 rotate in the same direction. The threads engraved on the outer ends of the first threaded rod 24 and the second threaded rod 26 are in the same direction. The outer end of the first bevel gear 31 is meshed with the second bevel gear 32. The middle part of the second bevel gear 32 is fixedly connected to the connecting shaft 33. The other end of the connecting shaft 33 is fixedly connected to the cylindrical gear 34. The cylindrical gear 34 is fixedly connected to the annular disk 21 through the support rod. A rack 35 is fixedly connected to the inner wall of the cabin 10. The rack 35 and the cylindrical gear 34 form a meshing connection.

[0028] As the annular disk 21 rises and falls, it can drive the cylindrical gear 34 to move together, causing the cylindrical gear 34 to roll along the rack 35 fixed to the inner wall of the cabin 10. This, in turn, drives the second bevel gear 32 to rotate through the connecting shaft 33, thereby driving the first bevel gear 31, which meshes with it, to rotate around its axis.

[0029] Working principle: When using this small sample grain detection device based on industrial vision, firstly, the grain sample to be tested is placed in the vibrating plate 6, and the vibration motor 8 is started. The vibration causes the grains to fall evenly and continuously into the chamber 10 through the feeding channel 12 and feeding pipe 13. The grains first fall into the central area of ​​the rotating dispersion plate 16. Under the guidance of centrifugal force and protrusions 17 and ridges 18, they are evenly and non-overlappingly dispersed to the edge area of ​​the dispersion plate 16. The controller 11 controls the servo motor 25 to work. The servo motor 25 drives the first threaded rod 24 to rotate, and through the driving wheel 27, the transmission belt 29 and the driven wheel 28, it drives the second threaded rod 26 to rotate in the same direction. This allows the slider 23, which meshes with the two threaded rods, to synchronously and smoothly drive the annular disk 21 and the shooting component mounted on it to rise and fall vertically along the slide groove 22. When the annular disk 21 rises and falls, it can drive the cylindrical gear 34 to move together, so that the cylindrical gear 34 rolls along the rack 35 fixed to the inner wall of the cabin 10. This drives the second bevel gear 32 to rotate through the connecting shaft 33, and then drives the first bevel gear 31, which meshes with it, to rotate around its axis. This enables the industrial camera 38 to rotate and shoot around the grain while changing the shooting height. The LED beads 37 provide illumination and the backlight plate 19 provides bottom backlight. The industrial camera 38 captures images of the uniformly dispersed grains from multiple angles and heights, such as the top and the side. The acquired image data is transmitted to the controller 11 for analysis and processing to realize the detection of grain shape, defects and other features. After the inspection is completed, the dispersing disc 16 can be briefly accelerated or other auxiliary methods can be used to throw the grains to the bottom of the chamber 10. With the help of the inclined bottom surface and the cleaning action of the brush plate 20, the grains and impurities are discharged through the material outlet 39, completing one inspection cycle. The whole process is highly automated, realizing efficient, multi-view, and high-precision visual inspection of small sample grains.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small-sample grain detection device based on industrial vision, comprising a top base (1), characterized in that: Support legs (2) are fixedly connected to the four corners of the bottom of the top seat (1). A connecting plate (3) is fixedly connected between the support legs (2). The connecting plate (3) is located at the bottom of the top seat (1). A vibrating discharge mechanism is provided on the top of the top seat (1). The vibrating discharge mechanism can shake the material evenly. A mounting frame (9) and a chamber (10) are provided on the top of the connecting plate (3). One end of the mounting frame (9) is fixedly connected to the support legs (2). The other end of the mounting frame (9) is connected to the chamber (10). The outer end of the chamber (10) is fitted with a chamber (10). A feeding channel (12) is provided on the side of the top of the top seat (1) near the vibrating discharge mechanism. A feeding pipe (13) is connected to the bottom of the feeding channel (12). The feeding pipe (13) extends into the interior of the chamber (10). The cabin (10) is equipped with a dispersion plate (16) inside. A backlight plate (19) is fixedly connected to the bottom end of the dispersion plate (16). A centrifugal dispersion mechanism is provided inside the dispersion plate (16). The centrifugal dispersion mechanism can evenly and non-contactly drop the material into the edge of the dispersion plate (16). An annular plate (21) is provided inside the cabin (10). A lifting mechanism is provided inside the cabin (10) to drive the annular plate (21) to move longitudinally. An installation plate (30) is rotatably connected inside the annular plate (21). The top end of the installation plate (30) is fixedly connected to... A first bevel gear (31) is connected to the top of the first bevel gear (31), and a funnel plate (36) is fixedly connected to the top of the first bevel gear (31). The funnel plate (36) is located outside the feed pipe (13). A transmission mechanism is provided inside the chamber (10) to drive the first bevel gear (31) to rotate. Multiple LED beads (37) are evenly embedded at the bottom of the first bevel gear (31). An industrial camera (38) is provided on the bottom wall of the first bevel gear (31) and the side wall of the mounting plate (30). A material outlet (39) is opened at the side end of the chamber (10).

2. The small-sample grain detection device based on industrial vision according to claim 1, characterized in that: The vibrating discharge mechanism includes a fixed foot (4), a limiting frame (5), a vibrating plate (6), a damping spring (7), and a vibrating motor (8). The top of the top seat (1) is fixedly connected to the fixed foot (4), the inner end of the fixed foot (4) is fixedly connected to the limiting frame (5), the vibrating plate (6) is slidably connected inside the limiting frame (5), the bottom end of the vibrating plate (6) is fixedly connected to the damping spring (7), and the bottom end of the vibrating plate (6) is supported by the vibrating motor (8).

3. The small-sample grain detection device based on industrial vision according to claim 1, characterized in that: The centrifugal dispersion mechanism includes a drive motor (14), a transmission shaft (15), a protrusion (17), and a ridge (18). The drive motor (14) is mounted on the bottom of the chamber (10). The output end of the drive motor (14) is fixedly connected to the transmission shaft (15). The top end of the transmission shaft (15) is connected to the dispersion disc (16). The top center of the dispersion disc (16) is fixedly connected to the protrusion (17). The outer end of the protrusion (17) is provided with a ridge (18).

4. The small-sample grain detection device based on industrial vision according to claim 3, characterized in that: The protruding ridge (18) is arranged in a spiral outward radial configuration, and the height of the protruding ridge (18) gradually decreases from top to bottom.

5. The small-sample grain detection device based on industrial vision according to claim 1, characterized in that: The bottom end of the backlight panel (19) is fixedly connected to a brush plate (20), and the bottom end of the cabin (10) is inclined downward toward the material outlet (39).

6. The small-sample grain detection device based on industrial vision according to claim 1, characterized in that: The lifting mechanism includes a slide groove (22), a slider (23), a first threaded rod (24), a servo motor (25), a second threaded rod (26), a drive wheel (27), a driven wheel (28), and a transmission belt (29). Slide grooves (22) are provided on both the left and right sides of the cabin (10). The two ends of the annular disc (21) are fixedly connected to sliders (23), which are slidably connected in the slide grooves (22). The first threaded rod (24) is rotatably connected inside the left slide groove (22) of the cabin (10), and the second threaded rod (26) is rotatably connected inside the right slide groove (22) of the cabin (10). The first threaded rod (24) and the second threaded rod (26) are both threaded through the corresponding positions. The slider (23) is placed, the first threaded rod (24) extends to the outside of the cabin (10) and forms a rotatable connection with the cabin (10), the bottom end of the first threaded rod (24) is fixedly connected to a servo motor (25), the servo motor (25) is mounted on the connecting plate (3), the outer end of the first threaded rod (24) is fixedly connected to a drive wheel (27), the second threaded rod (26) extends to the outside of the cabin (10) and forms a rotatable connection with the connecting plate (3), the outer end of the second threaded rod (26) is fixedly connected to a driven wheel (28), the drive wheel (27) and the driven wheel (28) are both located at the bottom of the cabin (10), and the drive wheel (27) and the driven wheel (28) are sleeved with a transmission belt (29).

7. The small-sample grain detection device based on industrial vision according to claim 6, characterized in that: The dimensions of the groove (22) and the slider (23) are matched, and a polished layer is provided at the contact point between the groove (22) and the slider (23).

8. The small-sample grain detection device based on industrial vision according to claim 6, characterized in that: The first threaded rod (24) and the second threaded rod (26) rotate in the same direction, and the threads engraved on the outer ends of the first threaded rod (24) and the second threaded rod (26) are in the same direction.

9. The small-sample grain detection device based on industrial vision according to claim 1, characterized in that: The transmission mechanism includes a second bevel gear (32), a connecting shaft (33), a cylindrical gear (34), and a rack (35). The outer end of the first bevel gear (31) is meshed with the second bevel gear (32). The middle part of the second bevel gear (32) is fixedly connected to the connecting shaft (33). The other end of the connecting shaft (33) is fixedly connected to the cylindrical gear (34). The cylindrical gear (34) is fixedly connected to the annular disk (21) through a support rod. The rack (35) is fixedly connected to the inner wall of the cabin (10). The rack (35) and the cylindrical gear (34) form a meshing connection.

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