A specimen picking and conveying device for plant specimen photographing identification

Abstract

The present application relates to the field of plant specimen identification and delivery, and discloses a specimen picking and delivering device for plant specimen photographing and identification, comprising a machine shell, wherein an identification detection head is installed on the machine shell through a top frame fixed to the top end of the machine shell. The specimen picking and delivering device for plant specimen photographing and identification can effectively solve the problem that, in the process of using a conveying belt to convey and photograph specimens, due to the different types, sizes and placement positions of the plant specimens carried on the paper, the center of gravity of each paper exists differences, the center of gravity deviation in the conveying process drives the whole paper to deviate, plus the inertial impact force when the conveying belt starts and stops and the vibration in the running process, further aggravating the deviation of the paper and the plant specimens on the surface of the paper perpendicular to the forward direction, causing the plant specimens to deviate from the center area of the field of view of the photographing imaging, resulting in blurred specimen feature shooting and affecting the imaging accuracy.

Description

Technical Field

[0001] This invention relates to the field of plant specimen identification and transport technology, specifically to a specimen picking and transporting device for photographing and identifying plant specimens. Background Technology

[0002] Herbarium specimens (also called pressed specimens) are the most commonly used type of specimen in plant taxonomy and herbariums. They refer to specimens made by collecting the whole plant or parts of its organs, pressing, drying, and binding them onto mounting paper. In plant taxonomy research and the digitization of herbariums, photographing the mounting paper, printed with identification codes and serial numbers, along with the herbarium specimen is a core step in achieving digital archiving of specimen information. Specimen pickup and conveying devices have become one of the key pieces of equipment for achieving automated specimen identification.

[0003] In existing technologies, during the transport and photography of specimens using conveyor belts, the center of gravity of each plate varies due to differences in the type, size, and placement of the plant specimens on the plate. This shift in the center of gravity during transport causes the plate to tilt to one side. In addition, the inertial impact force when the conveyor belt starts and stops, as well as the vibration during operation, further exacerbate the shift of the plate and the plant specimens on its surface perpendicular to the direction of travel. This causes the plant specimens to deviate from the center of the field of view for photographic imaging, resulting in blurred specimen features and affecting imaging accuracy. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a specimen pickup and conveying device for photographing and identifying plant specimens. This device effectively solves the problem in existing technologies where, during the transport and photographing of specimens using a conveyor belt, the center of gravity of each platen varies due to differences in the type, size, and placement of the plant specimens. This shift in the center of gravity causes the platen to tilt laterally. Furthermore, the inertial impact of the conveyor belt during start-up and stop, along with vibrations during operation, further exacerbates the deviation of the platen and the plant specimens on its surface from the direction of travel. This results in the plant specimens deviating from the center of the photographic field of view, causing blurred specimen features and affecting imaging accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a specimen pickup and conveying device for photographing and identifying plant specimens, comprising:

[0007] The housing has an identification detection head mounted on a top frame fixed to its internal top.

[0008] The conveying unit includes a worktable fixedly connected inside the housing, a conveyor belt for conveying plant specimens is installed on the upper surface of the worktable, and a centering component is provided on the upper surface of the worktable.

[0009] The centering assembly includes two movable seats that are slidably connected to the upper surface of the worktable. These two movable seats are symmetrically distributed around the conveyor belt. A bidirectional threaded rod is provided on the upper surface of the worktable, with its outer end penetrating the movable seat and engaging with its interior. A movable cavity is formed on the upper surface of the movable seat, and a correction component is disposed within the cavity. Two conveyor belts are provided, symmetrically distributed on both sides of the worktable.

[0010] Furthermore, it also includes a pickup unit, which includes a bracket fixedly connected to the inner wall surface of the housing. A crossbeam is slidably connected to the outer surface of the bracket. A drive seat is slidably connected to the crossbeam via a slide rail opened inside it. A connecting plate is connected to the drive seat via a cylinder set on its lower surface. A suction nozzle is embedded inside the connecting plate. An imaging stage fixedly connected to the outer surface of the bracket is provided above the movable seat.

[0011] Furthermore, a loading frame is provided on one side of the workbench, and a unloading frame is provided on the other side of the workbench away from the loading frame.

[0012] Furthermore, the outer surface of the conveyor belt is provided with positioning grooves, and a plurality of positioning grooves are evenly arranged along the outer surface of the conveyor belt. The correction component includes a movable rod that fits against the side wall surface of the movable cavity. A connecting rod is fixedly connected to the upper surface of the movable rod, and a pressing block is fixedly connected to the upper surface of the connecting rod.

[0013] Furthermore, the movable rod is slidably connected to a fixed rod through a through hole inside it. The outer end of the fixed rod is fixedly connected to the inner wall surface of the movable cavity. The outer end of the movable rod is provided with a spring that is connected to the inner wall surface of the movable cavity. The spring is sleeved on the outer circumferential surface of the fixed rod.

[0014] Furthermore, the side of the pressing block near the positioning groove adopts an arc surface design, the groove opening of the positioning groove adopts a flared slope design, and the upper surface of the pressing block is higher than the upper surface of the conveyor belt.

[0015] Furthermore, a guide support is embedded on the outer surface of the feeding frame, and a sliding plate slides vertically inside the guide support. A slider slides horizontally through a groove formed inside the sliding plate, and a support beam is slidably connected to the side of the slider closest to the feeding frame. Two guide supports are provided, and the two guide supports are symmetrically distributed on both sides of the feeding frame.

[0016] Furthermore, the guide support has a guide groove inside, and a guide block that fits against the inner wall surface of the guide groove is fixedly connected to the outer surface of the slider. The upper surface of the support beam is inclined, and the lowest point of the upper surface of the support beam is located on the side away from the conveyor belt.

[0017] The technical solution provided by this invention has the following advantages compared with the prior art:

[0018] 1. This invention comprises a worktable, a conveyor belt, and centering components. Two centering components in each group are symmetrically positioned directly below the imaging stage, forming a symmetrical clamping configuration. This ensures that the correction force is applied evenly from both sides of the paper, preventing secondary offset of the paper due to unilateral force. Specifically, a drive motor on the upper surface of the worktable rotates a bidirectional threaded rod. The threaded engagement between the bidirectional threaded rod and two movable seats drives the two movable seats to slide synchronously towards each other along the upper surface of the worktable, thereby driving the correction components within the movable cavities of the movable seats to move synchronously towards each other. This ensures that the displacement of the pressure blocks on both sides is completely consistent, guaranteeing that the paper always moves along the central axis of the conveyor belt during the correction process, thus improving the stability and consistency of positioning.

[0019] 2. Due to the thinness of the plant specimen mounting paper, existing positioning structures often employ a clamping method that slides horizontally against the conveyor belt surface. This method is prone to causing the edge of the mounting paper to get stuck in the gap due to insufficient clearance between the positioning structure and the conveyor belt, resulting in damage to the mounting paper or specimen wear. In this invention, positioning grooves are evenly distributed on the outer surface of the conveyor belt, and a pressing block from the centering component moves into these grooves. The upper surface of the pressing block is higher than the upper surface of the conveyor belt (ensuring contact between the pressing block and the side of the mounting paper for correction), and the lower surface of the pressing block is located inside the positioning groove on the upper side of the conveyor belt, slightly higher than the bottom of the inner wall of the positioning groove on the upper side of the conveyor belt (eliminating the vertical gap between the pressing block and the upper surface of the conveyor belt, preventing the horizontally conveyed mounting paper from getting stuck between them). This effectively prevents damage to the mounting paper and the specimens on it, ensuring the integrity of the mounting paper and the plant specimens on it. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0022] Figure 2This is a schematic diagram of the structure of the conveying unit, top frame, and picking unit according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the conveying unit, top frame, and picking unit from another angle according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the cross frame, drive base, connecting plate and suction nozzle in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the workbench, conveyor belt, moving seat, and unloading frame according to an embodiment of the present invention;

[0026] Figure 6 This is a top view schematic diagram of the conveyor belt, positioning groove, movable seat, and pressing block according to an embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional structural diagram of the conveyor belt, movable seat, and pressing block according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the components in an embodiment of the present invention;

[0029] Figure 9 This is a schematic cross-sectional view of the conveyor belt and the unloading frame according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the feeding frame, guide support, sliding plate, slider and supporting beam in an embodiment of the present invention.

[0031] The labels in the diagram represent: 1. Housing; 11. Top frame; 12. Identification and detection head; 13. Imaging stage; 2. Conveying unit; 21. Worktable; 22. Conveyor belt; 221. Positioning groove; 23. Centering component; 231. Moving seat; 2311. Movable cavity; 232. Bidirectional threaded rod; 233. Correction component; 2331. Movable rod; 2332. Connecting rod; 2333. Pressing block; 2334. Fixed rod; 2335. Spring; 24. Unloading frame; 241. Guide support; 2411. Guide groove; 242. Sliding plate; 243. Slider; 2431. Guide block; 244. Support beam; 3. Pickup unit; 31. Bracket; 32. Cross frame; 33. Drive seat; 34. Connecting plate; 35. Suction nozzle; 36. Loading frame. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example

[0035] Please see Figures 1-10 This invention provides a technical solution: a specimen pickup and conveying device for photographing and identifying plant specimens, comprising:

[0036] The housing 1 has an identification detection head 12 mounted on a top frame 11 fixed to its internal top.

[0037] The conveying unit 2 includes a workbench 21 fixedly connected inside the housing 1. A conveyor belt 22 for conveying plant specimens is installed on the upper surface of the workbench 21, and a centering component 23 is provided on the upper surface of the workbench 21.

[0038] The centering component 23 includes a movable seat 231 that is slidably connected to the upper surface of the workbench 21. There are two movable seats 231, which are symmetrically distributed with the conveyor belt 22 as the center. The upper surface of the workbench 21 is provided with a bidirectional threaded rod 232. The outer end of the bidirectional threaded rod 232 passes through the movable seat 231 and meshes with the interior of the movable seat 231. The upper surface of the movable seat 231 is provided with a movable cavity 2311, and a correction component 233 is provided inside the movable cavity 2311.

[0039] Preferably, there are two conveyor belts 22, which are symmetrically distributed on both sides of the worktable 21.

[0040] It also includes a pickup unit 3, which includes a bracket 31 fixedly connected to the inner wall surface of the housing 1. A crossbeam 32 is slidably connected to the outer surface of the bracket 31. A drive seat 33 is slidably connected to the crossbeam 32 via a slide rail opened inside it. A connecting plate 34 is connected to the drive seat 33 via a cylinder set on its lower surface. A suction nozzle 35 is embedded inside the connecting plate 34. An imaging stage 13 fixedly connected to the outer surface of the bracket 31 is provided above the moving seat 231.

[0041] A loading frame 36 is provided on one side of the workbench 21, and a unloading frame 24 is provided on the other side of the workbench 21 away from the loading frame 36.

[0042] The outer surface of the conveyor belt 22 is provided with multiple positioning grooves 221, which are evenly distributed on the outer surface of the conveyor belt 22. The correction component 233 includes a movable rod 2331 that fits against the side wall surface of the movable cavity 2311. Multiple connecting rods 2332 are fixedly connected to the upper surface of the movable rod 2331. The multiple connecting rods 2332 are arrayed on the upper surface of the movable rod 2331. A pressing block 2333 is fixedly connected to the upper surface of the connecting rod 2332.

[0043] The movable rod 2331 is slidably connected to the fixed rod 2334 through a through hole opened inside it. The outer end of the fixed rod 2334 is fixedly connected to the inner wall surface of the movable cavity 2311. The outer end of the movable rod 2331 is provided with a spring 2335 connected to the inner wall surface of the movable cavity 2311. The spring 2335 is sleeved on the outer circumferential surface of the fixed rod 2334.

[0044] The side of the pressing block 2333 near the positioning groove 221 is designed with an arc surface, and the groove opening of the positioning groove 221 is designed with a sloping flared opening. The upper surface of the pressing block 2333 is higher than the upper surface of the conveyor belt 22.

[0045] The outer surface of the feeding frame 24 is fitted with a guide support 241. A sliding plate 242 slides vertically inside the guide support 241. A slider 243 slides horizontally through a groove opened inside the sliding plate 242. A support beam 244 is slidably connected to the side of the slider 243 near the feeding frame 24.

[0046] There are two guide supports 241, which are symmetrically distributed on both sides of the feeding frame 24.

[0047] The guide support 241 has a guide groove 2411 inside, and the outer surface of the slider 243 is fixedly connected to a guide block 2431 that fits against the inner wall surface of the guide groove 2411. The upper surface of the support beam 244 is designed with an inclination, and the lowest point of the upper surface of the support beam 244 is located on the side away from the conveyor belt 22.

[0048] Initially, the crossbeam 32 is positioned on the side of the support 31 closest to the loading frame 36, and the drive seat 33 is located on the side of the crossbeam 32 closest to the loading frame 36. At this time, the connecting plate 34 is directly above the loading frame 36. Multiple sheets of paper with plant specimens attached are stacked inside the loading frame 36. The top frame 11 is fixedly connected to the upper surface inside the housing 1 and directly above the loading frame 36. Alignment components 23 are provided on both sides of the conveyor belt 22 directly below the imaging stage 13. Multiple positioning grooves 221 are evenly distributed on the outer surface of the conveyor belt 22. Multiple connecting rods 2332 and pressing blocks 2333 are fixedly connected to the upper surface of the movable rod 2331. The multiple connecting rods 2332 and pressing blocks 2333 are evenly distributed in an array along the upper surface of the movable rod 2331, and the distance between two adjacent pressing blocks 2333 is equal to the distance between two adjacent positioning grooves 221.

[0049] The upper surface of the workbench 21 in the conveyor section 2 is equipped with a drive motor for transmitting the bidirectional threaded rod 232. Based on the specifications of the specimen paper to be processed, the maximum displacement of the moving seat 231 is preset (i.e., when the drive motor drives the bidirectional threaded rod 232 to rotate, the threads of the bidirectional threaded rod 232 and the moving seat 231 engage, causing the two moving seats 231 to slide towards each other along the upper surface of the workbench 21 until the distance between the two pressing blocks 2333 is slightly greater than the width of the paper). Initially, the distance between the two moving seats 231, symmetrically distributed around the conveyor belt 22, is at its maximum. At this time, one side of the curved surface of the pressing block 2333 is not in contact with the outer surface of the conveyor belt 22, the springs 2335 on both sides of the moving rod 2331 are in a naturally extended / retracted state, and the moving rod 2331 is centered inside the moving cavity 2311.

[0050] The guide groove 2411 within the guide support 241 includes a vertical section and an inclined section, which are internally connected. The vertical section is located above the inclined section, and the bottom end of the inclined section is located on the outer side of the vertical section away from the feed frame 24. Initially, the sliding plate 242 is at its uppermost position within the guide support 241, and the guide block 2431 on the outer surface of the slider 243 is at the top of the vertical section in the guide groove 2411. Simultaneously, the slider 243 is located on the side of the upper surface of the sliding plate 242 closest to the support beam 244 within its stroke range. At this point, the distance between the two sliders 243 is minimal, and the distance between the two support beams 244 is also minimal. In this case, the distance between the two support beams 244 is less than the width of the paper tray.

[0051] The process of picking up the table paper:

[0052] First, the identification and detection head 12 installed in the top frame 11 is activated. The identification and detection head 12 scans and detects the topmost plant specimen tray paper in the loading frame 36 and transmits the detection signal to the drive unit. The drive unit controls the picking unit 3 to classify and place the specimen.

[0053] Then, the cylinder on the lower surface of the drive seat 33 is activated. The cylinder extends, causing the connecting plate 34 and the suction nozzle 35 to move downwards. After the suction nozzle 35 contacts the corner of the uppermost plant specimen mounting paper in the feeding frame 36, the suction nozzle 35 generates negative pressure to adsorb the mounting paper. Then, the cylinder retracts, causing the mounting paper to move upwards to a preset height. Through the sliding cooperation between the crossbeam 32 and the drive seat 33, the mounting paper is moved directly above one of the conveyor belts 22. The cylinder extends again, the suction nozzle 35 releases the negative pressure, and the mounting paper is placed stably on the upper surface of one of the conveyor belts 22.

[0054] The process of transporting and locating plant specimens:

[0055] The conveyor belt 22 is started to move the specimen tray paper towards the lower feed frame 24 until the specimen tray paper is transported directly below the imaging stage 13. Then the conveyor belt 22 stops running, ready to take pictures of the plant specimen on the tray paper to realize the electronic storage of specimen information.

[0056] During the transport process, the mounting paper on which the plant specimen is placed is prone to shift due to the inertia caused by the vibration of the conveyor belt 22 and sudden stop. This causes the plant specimen to shift to the sides of the conveyor belt 22 and not be centered with the imaging area below the imaging stage 13, affecting the recognition accuracy. Therefore, the centering component 23 is required to correct the plant specimen.

[0057] The drive motor on the upper surface of the worktable 21 is started, which drives the bidirectional threaded rod 232 to rotate. The outer end of the bidirectional threaded rod 232 passes through the movable seat 231, and the outer circumferential surface of the bidirectional threaded rod 232 engages with the internal thread of the movable seat 231. When the bidirectional threaded rod 232 rotates forward, it drives the two movable seats 231 to slide towards each other along the upper surface of the worktable 21. The lower surface of the pressing block 2333 is slightly higher than the bottom of the inner wall of the positioning groove 221 on the upper side of the conveyor belt 22, and the upper surface of the pressing block 2333 is higher than the upper surface of the conveyor belt 22, so it can contact the side of the paper placed on the upper surface of the conveyor belt 22.

[0058] As the movable seat 231 slides towards the conveyor belt 22, the movable rod 2331, connecting rod 2332, fixed rod 2334, spring 2335, and pressing block 2333 inside the movable cavity 2311 move synchronously towards the conveyor belt 22. Because the start and stop of the conveyor belt 22 are random, when it stops, the perpendicular surface of the pressing block 2333 cannot completely coincide with the perpendicular surface of the corresponding positioning groove 221, resulting in a movement error between their perpendicular surfaces. Furthermore, the side of the pressing block 2333 closest to the positioning groove 221 features an arc surface design, and the opening of the positioning groove 221 adopts a flared, beveled design. As the pressing block 2333 gradually embeds into the positioning groove 221, the outer end of the arc surface of the pressing block 2333 is not directly aligned with the center of the positioning groove 221. Instead, the arc surface of its outer end fits against the inner wall surface of the flared inclined surface of the positioning groove 221. As the bidirectional threaded rod 232 continues to drive the moving seat 231 and its internal correction component 233 to move, multiple pressing blocks 2333 are simultaneously guided by the inclined surface of their corresponding positioning groove 221. The multiple pressing blocks 2333 automatically adjust their positions along the inclined surface, gradually sliding towards the center of the positioning groove 221. At the same time, the multiple pressing blocks 2333 drive the movable rod 2331 to slide slightly along the outer circumference of the fixed rod 2334 through the corresponding connecting rod 2332. The spring 2335 sleeved on the fixed rod 2334 then adaptively expands and contracts, achieving precise compensation for the movement error of the vertical plane.

[0059] During this process, the fixing rod 2334 can slide inside the movable cavity 2311, simultaneously eliminating the offset of the positioning groove 221 and the pressing block 2333 in the front-back direction, ensuring that the pressing block 2333 is finally smoothly embedded into the positioning groove 221 and fits against the groove wall. The moving seats 231 on both sides continue to slide towards each other until the distance between the outer ends of the pressing blocks 2333 on both sides reaches a preset value (i.e., the distance between the outer ends of the pressing blocks 2333 on both sides is slightly greater than the width of the mounting paper). During this process, if the mounting paper is offset, the side of the pressing block 2333 contacts the side edge of the plant specimen mounting paper and generates a pressing force, and will gradually move towards the center position of the conveyor belt 22 under the pushing force of the pressing block 2333. The plant specimen mounting paper is finally accurately corrected to the center of the imaging area below the imaging stage 13, completing the positioning, avoiding the left and right position offset of the mounting paper during imaging, and ensuring the clarity of the specimen imaging.

[0060] After positioning is complete, the drive motor drives the bidirectional threaded rod 232 to reverse, simultaneously moving the two movable seats 231 away from the conveyor belt 22. This causes the pressing blocks 2333 to disengage from the positioning groove 221 and no longer press against the side of the mounting paper, reserving space for subsequent mounting paper transport. Once the multiple pressing blocks 2333 have simultaneously disengaged from the positioning groove 221, they are no longer constrained by it. Under the elastic reset action of the spring 2335, the movable rod 2331 slides along the outer surface of the fixed rod 2334 until it returns to the center of the movable cavity 2311. As the bidirectional threaded rod 232 continues to reverse, the distance between the two movable seats 231 is once again at its maximum, preparing for the next positioning of the plant specimen mounting paper.

[0061] The process of photographing and imaging plant specimens:

[0062] The imaging stage 13 is activated, and it takes pictures of the plant specimen on the positioned substrate paper, acquiring specimen image information. After the picture is taken, the conveyor belt 22 is restarted, driving the substrate paper to be transported towards the lower material frame 24.

[0063] The process of cutting and stacking plant specimen mounting paper:

[0064] When the specimen is conveyed to the end near the unloading frame 24 by the conveyor belt 22, it detaches from the support of the conveyor belt 22 and falls onto the upper surface of the support beam 244 above the unloading frame 24 under the influence of gravity. Because the upper surface of the support beam 244 is designed with an incline, and its lowest point is located on the side away from the conveyor belt 22, the specimen will slide smoothly and completely onto the inclined surface of the support beam 244, avoiding direct drop that could cause wrinkles in the specimen or damage to the specimen.

[0065] The guide support 241 is equipped with a drive mechanism that drives the sliding plate 242 and the slider 243 on its upper surface to slide downwards along the vertical groove inside the guide support 241. In the initial stage, the guide block 2431 is in the vertical section of the guide groove 2411, and the slider 243 and the supporting beam 244 on its outer surface move only vertically downwards, causing the paper to move into the lower feed frame 24. At this time, the supported paper is close to the upper surface of the paper in the lower feed frame 24, and the two are almost parallel.

[0066] As the sliding plate 242 drives the slider 243 to continue moving downwards, the guide block 2431 gradually moves from the vertical section of the guide groove 2411 into the inclined section. Guided by the inner wall of the inclined section, the guide block 2431 drives the slider 243 to slide along the groove on the sliding plate 242 away from the unloading frame 24, that is, the distance between the two sliders 243 gradually increases, and the distance between the two supporting beams 244 also increases synchronously. When the distance between the supporting beams 244 increases to be greater than the width of the paper, the paper loses its support and falls smoothly into the unloading frame 24 to complete the stacking. Subsequently, the drive mechanism drives the sliding plate 242 to reset upwards, the guide block 2431 returns to the vertical section along the inclined section, and the slider 243 slides towards the supporting beams 244 under the action of its own reset structure or the drive mechanism. The distance between the two supporting beams 244 returns to its initial minimum state, preparing for the unloading and stacking of the next paper. The entire process requires no manual intervention, realizing the automated and orderly stacking of the paper, while avoiding collision damage to the specimens during the stacking process. During the stacking process, the plant specimen mounting paper to be unloaded is first moved to the top of the plant specimen mounting paper in the unloading frame 24, and the two are relatively close. Finally, under the action of the two support beams 244 with gradually increasing spacing, it falls smoothly to the top of the plant specimen mounting paper in the unloading frame 24. This avoids the upper mounting paper from scraping the plant specimen in the unloading frame 24 when the material is directly tilted for unloading, thus ensuring the integrity of the specimen.

[0067] In summary, this specimen pickup and transport device has the following advantages during the transport process:

[0068] Advantage 1: The symmetrically arranged centering components 23 directly below the imaging stage 13 form a symmetrical clamping structure, ensuring that the correction force is applied evenly from both sides of the paper, avoiding secondary displacement of the paper due to unilateral force. Specifically, a drive motor on the upper surface of the worktable 21 drives the bidirectional threaded rod 232 to rotate. The threaded engagement between the bidirectional threaded rod 232 and the two moving seats 231 drives the two moving seats 231 to slide synchronously towards each other along the upper surface of the worktable 21, thereby driving the correction components 233 in the movable cavity 2311 within the moving seats 231 to move synchronously towards each other. This ensures that the displacement of the two pressure blocks 2333 is completely consistent, guaranteeing that the paper always moves along the central axis of the conveyor belt 22 during the correction process, improving the stability and consistency of positioning.

[0069] Advantage 2: Due to the thinness of the plant specimen mounting paper, existing positioning structures often employ a clamping method that slides horizontally against the surface of the conveyor belt 22. This is prone to problems because the gap between the positioning structure and the conveyor belt 22 is too small, causing the edge of the mounting paper to get stuck in the gap, resulting in paper breakage or specimen abrasion. In this invention, positioning grooves 221 are evenly distributed on the outer surface of the conveyor belt 22, and the pressure block 2333 in the centering component 23 is embedded and moved into them. The upper surface of the pressure block 2333 is higher than the upper surface of the conveyor belt 22 (ensuring that the pressure block 2333 contacts the side of the mounting paper for correction), and the lower surface of the pressure block 2333 is inside the positioning groove 221 on the upper side of the conveyor belt 22, and slightly higher than the bottom of the inner wall of the positioning groove 221 on the upper side of the conveyor belt 22 (eliminating the vertical gap between the pressure block 2333 and the upper surface of the conveyor belt 22, preventing the horizontally conveyed mounting paper from getting stuck between them). This avoids damage to the mounting paper and the specimen above it, ensuring the integrity of the mounting paper and the specimen.

[0070] Thirdly, to address the mid-plane error caused by the randomness of the start and stop of the conveyor belt 22, the design of the arc surface of the pressure block 2333 near the positioning groove 221 is adopted. Combined with the flared slope of the groove opening of the positioning groove 221, when the pressure block 2333 is embedded in the positioning groove 221, the contact between the arc surface and the slope can generate an automatic guiding force. The pressure block 2333 drives the movable rod 2331 to adaptively displace within the movable cavity 2311, thereby achieving fine-tuning of the position of the pressure block 2333. This can automatically adjust the position of the pressure block 2333, eliminate the front-to-back offset, and allow the pressure block 2333 to move smoothly into the interior of the positioning groove 221. Finally, the paper is accurately corrected to the center of the imaging area, completely solving the problem of offset perpendicular to the conveying direction caused by the difference in the center of gravity of the paper and the vibration of the conveyor belt in existing products, ensuring the accuracy of image recognition.

[0071] Fourthly, in the guide support 241, the guide groove 2411 includes an internally connected vertical section and an inclined section. Combined with the coordinated transmission of the sliding plate 242, the slider 243, and the supporting beam 244, it can achieve a material feeding mode of first smoothly conveying vertically downwards and then opening left and right to drop the material, solving the defects of the existing traditional direct inclined drop feeding structure. The guide groove 2411 within the guide support 241 consists of an interconnected vertical section and an inclined section (the vertical section is located above the inclined section, and the bottom end of the inclined section extends away from the feeding frame 24). In the initial state, the sliding plate 242 is at the top of the guide support 241's stroke, the guide block 2431 of the slider 243 is located at the top of the vertical section of the guide groove 2411, and the distance between the two supporting beams 244 is minimal (less than the width of the paper tray), which can stably support the paper dropping from the end of the conveyor belt 22. When the feeding process begins, the drive mechanism inside the guide support 241 drives the sliding plate 242 and its slider 243 and support beam 244 to slide downwards along the vertical section of the guide groove 2411. This stage is a vertical descent process, and the support beam 244 only moves vertically, causing the paper on it to move down synchronously to directly above the stacked paper in the feeding frame 24, with a small gap between them to reduce the impact force of the fall. As the sliding plate 242 continues to move down, the guide block 2431 smoothly enters the inclined section from the vertical section of the guide groove 2411. Under the guiding force of the inner wall of the inclined section, the guide block 2431 drives the slider 243 to slide synchronously along the sliding groove of the sliding plate 242 away from the feeding frame 24, and the gap between the two support beams 244 gradually widens. When the gap between the support beams 244 widens to more than the width of the paper, the paper loses its support and falls steadily onto the stacked layer below under its own weight. Because the fall height is extremely low and the fall is parallel, no lateral impact force is generated. This prevents the table paper from scratching the edge of the feed frame 24 or other structures during its fall, protecting the specimen from damage; it also prevents wrinkles in the table paper caused by high drops, ensuring the flatness of the table paper.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A specimen pickup and conveying device for photographing and identifying plant specimens, characterized in that, include: The housing (1) is equipped with an identification detection head (12) by means of a top frame (11) fixed to its internal top. The conveying unit (2) includes a workbench (21) fixedly connected inside the housing (1), and a conveyor belt (22) for conveying plant specimens is installed on the upper surface of the workbench (21). A centering component (23) is provided on the upper surface of the workbench (21). The centering component (23) includes a movable seat (231) that is slidably connected to the upper surface of the workbench (21). There are two movable seats (231), which are symmetrically distributed with the conveyor belt (22) as the center. The upper surface of the workbench (21) is provided with a bidirectional threaded rod (232). The outer ends of the two sides of the bidirectional threaded rod (232) pass through the two movable seats (231) respectively and mesh with the interior of the corresponding movable seats (231). The upper surface of the movable seat (231) is provided with a movable cavity (2311), and a correction component (233) is provided inside the movable cavity (2311). The outer surface of the conveyor belt (22) is provided with a positioning groove (221). The correction component (233) includes a movable rod (2331) that fits against the side wall surface of the movable cavity (2311). A connecting rod (2332) is fixedly connected to the upper surface of the movable rod (2331). A pressing block (2333) is fixedly connected to the upper surface of the connecting rod (2332). A fixed rod (2334) is slidably connected to the movable rod (2331) through a through hole opened inside it. The outer end of the fixed rod (2334) is flush with the inner wall of the movable cavity (2311). The surface is fixedly connected, and the outer end of the movable rod (2331) is provided with a spring (2335) connected to the inner wall surface of the movable cavity (2311). The spring (2335) is sleeved on the outer circumferential surface of the fixed rod (2334). The side of the pressing block (2333) near the positioning groove (221) adopts an arc surface design. The groove opening of the positioning groove (221) adopts a sloping flared design. The upper surface of the pressing block (2333) is higher than the upper surface of the conveyor belt (22). The pressing block (2333) can be embedded and moved into the positioning groove (221).

2. The specimen pickup and conveying device for photographing and identifying plant specimens according to claim 1, characterized in that: It also includes a pickup unit (3), which includes a bracket (31) fixedly connected to the inner wall surface of the housing (1). A crossbar (32) is slidably connected to the outer surface of the bracket (31). A drive seat (33) is slidably connected to the crossbar (32) via a slide rail opened inside it. A connecting plate (34) is connected to the drive seat (33) via a cylinder set on its lower surface. A suction nozzle (35) is embedded inside the connecting plate (34). An imaging stage (13) fixedly connected to the outer surface of the bracket (31) is provided above the moving seat (231).

3. The specimen pickup and conveying device for photographing and identifying plant specimens according to claim 1, characterized in that: A loading frame (36) is provided on one side of the workbench (21), and a unloading frame (24) is provided on the other side of the workbench (21) away from the loading frame (36).

4. The specimen pickup and conveying device for photographing and identifying plant specimens according to claim 3, characterized in that: The outer surface of the feeding frame (24) is provided with a guide support (241), and a sliding plate (242) slides vertically inside the guide support (241). The sliding plate (242) slides horizontally through a groove opened inside it with a slider (243). The slider (243) is slidably connected to a support beam (244) on the side of the feeding frame (24) close to the feeding frame (24).

5. The specimen pickup and conveying device for photographing and identifying plant specimens according to claim 4, characterized in that: The guide support (241) has a guide groove (2411) inside, and the outer surface of the slider (243) is fixedly connected to a guide block (2431) that fits against the inner wall surface of the guide groove (2411).

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