A seedling detection device

Abstract

This utility model relates to the field of agricultural seedling technology, specifically a seedling detection device, including an operating table. Two sets of oppositely distributed boxes are fixed to the top of the operating table. A three-axis moving device and a countermoving device are provided between the two sets of boxes. A visual inspection device is mounted on the vertical moving end of the three-axis moving device. This seedling detection device, by adjusting the guide rail spacing through the countermoving device, can quickly adapt to rigid seedling trays of different sizes without replacing the conveying components, simplifying operation, improving detection efficiency, and meeting diverse needs. The synchronous belt pulley transmission mechanism combined with the guide rail provides stable power, and the guide rail limits both sides to prevent seedling tray conveying deviation, ensuring detection accuracy. Relying on the three-axis moving device, the visual inspection device can move flexibly along the X, Y, and Z directions to achieve full coverage detection of seedlings. The dual limiting components, in conjunction with the positioning sensor, ensure orderly conveying and precise positioning of seedling trays, eliminating stacking interference and balancing detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of agricultural seedling technology, specifically a seedling detection device. Background Technology

[0002] In modern agriculture, the quality of seedling cultivation directly determines crop yield and quality. Precise monitoring of the seedling cultivation process is crucial. Rigid seedling trays, due to their stable structure, reusability, and ease of mechanization, have become the mainstream carrier for large-scale seedling cultivation and are widely used in the cultivation of seedlings of various crops. During the seedling cultivation period, it is necessary to monitor the growth status, health status, and regularity of the seedling trays to provide a basis for subsequent cultivation management.

[0003] Currently, seedling inspection is transitioning from manual visual inspection to automated visual inspection. Manual inspection is highly subjective, prone to errors, and inefficient, making it difficult to meet the needs of large-scale operations. Automated visual inspection, on the other hand, achieves quantitative inspection through image acquisition and algorithm analysis, and has become the mainstream development direction.

[0004] However, the existing visual inspection devices have obvious limitations in their conveying mechanisms. The specifications of rigid seedling trays vary depending on the crop requirements, and most devices have fixed conveying mechanism dimensions that can only be used with a single type of seedling tray. When changing the object to be inspected, it is necessary to make cumbersome adjustments or even replace components, which not only reduces efficiency but also easily causes the seedling tray to shift during transport, affecting the inspection accuracy. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a seedling detection device, comprising an operating table, two sets of oppositely distributed boxes fixed to the top of the operating table, a three-axis moving device and a countermoving device provided between the two sets of boxes, a visual detection device mounted on the vertical moving end of the three-axis moving device, a side plate fixed to the moving end of the countermoving device and the left side box respectively, guide rails installed on opposite sides of both sides of the side plates, a conveying device moving along the inner side of the guide rails provided between the two sets of boxes, two sets of front-to-back limiting components installed on the operating table surface, and multiple positioning sensors installed on the operating table near the rear limiting components, the positioning sensors being electrically connected to the conveying device and the three-axis moving device.

[0006] Furthermore, the three-axis moving device includes a movable frame slidably assembled between the inner walls of two sets of boxes. The top of the box has a slot for the movable frame to pass through. A first lead screw device is installed on the right inner wall of the box. The nut end of the first lead screw device is fixed with a first moving block bolted to the movable frame. A second lead screw device is installed on the back of the movable frame, and the movable frame has two parallel elongated holes. The nut end of the second lead screw device is fixed with a U-shaped block located in the elongated hole. A connecting plate that slides and engages with the front of the movable frame is fixed between the two ends of the U-block. A concave plate is fixed on the connecting plate. A third lead screw device is installed on the concave plate. The nut end of the third lead screw device is fixed with a lifting plate that slides and engages with the inner wall of the concave plate. The vision inspection device is installed at the bottom of the lifting plate.

[0007] Furthermore, the repositioning device includes two sets of guide rods installed between the two sets of boxes, and a lead screw rotatably connected between the two sets of boxes. The lead screw is arranged parallel to the guide rods. The nut end of the lead screw is fixed with the right side plate that slides with the guide rod. The left side plate is fixed to the left box. One end of the lead screw extends to the outside of the right box and is fixed with a turntable.

[0008] Furthermore, the conveying device includes synchronous belt pulley transmission mechanisms rotatably connected to the two side plates respectively. The synchronous belt pulley transmission mechanism on the left side is fixedly mounted on the left side plate, and the synchronous belt pulley transmission mechanism on the right side moves synchronously with the right side plate. The guide rail has a U-shaped groove structure, and multiple sets of guide wheels that roll and cooperate with the synchronous belt in the synchronous belt pulley transmission mechanism are rotatably mounted on the side plate. A drive rod is rotatably connected between the two sets of housings. A spline sleeve is slidably mounted on the drive rod. The spline sleeve is keyed to the driving synchronous pulley of the synchronous belt pulley transmission mechanism. The surface of the synchronous belt of the synchronous belt pulley transmission mechanism is flush with the support surface of the guide rail. A driven bevel gear is fixed at one end of the drive rod located inside the right housing. A gear drive motor is installed inside the right housing. The output shaft of the gear drive motor is fixed with a driving bevel gear that meshes with the driven bevel gear.

[0009] Furthermore, the limiting component includes an upper-mounted cylinder installed on the operating table. The upper-mounted cylinder is located between the two guide rails, and a baffle is fixed to the top of the piston rod of the upper-mounted cylinder. After the baffle is raised, its top is higher than the support surface of the guide rail. The front limiting component is a pre-waiting limiting component, and the rear limiting component is a detection and positioning limiting component. The positioning sensor is electrically connected to the upper-mounted cylinder of the detection and positioning limiting component and the gear drive motor. The upper-mounted cylinders of the two limiting components are linked for control.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0011] This seedling detection device adjusts the guide rail spacing via a shifting device, quickly adapting to rigid seedling trays of different sizes without requiring replacement of conveying components. This simplifies operation, improves detection efficiency, and meets diverse needs. The synchronous belt pulley transmission mechanism combined with the guide rails provides stable power, while the guide rails limit the movement on both sides to prevent seedling trays from shifting, ensuring detection accuracy. Relying on a three-axis moving device, the vision detection device can move flexibly along the X, Y, and Z directions to achieve full coverage detection of seedlings. The dual limit components and positioning sensors work together to ensure orderly conveying and precise positioning of seedling trays, eliminating stacking interference and balancing detection efficiency and accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 A schematic diagram of the left-side partial three-dimensional structure;

[0014] Figure 3 This utility model Figure 1 A three-dimensional structural diagram of the right view of the box with one of the outer shells removed;

[0015] Figure 4 This utility model Figure 3 A three-dimensional schematic diagram of the concave plate connection structure.

[0016] In the diagram: 1. Operating platform; 2. Housing; 3. Slot; 4. First lead screw assembly; 5. First moving block; 6. Moving frame; 7. Second lead screw assembly; 8. U-shaped block; 9. Connecting plate; 10. Concave plate; 11. Third lead screw assembly; 12. Lifting plate; 13. Vision inspection device; 14. Guide rail; 15. Drive rod; 16. Gear drive motor; 17. Driven bevel gear; 18. Synchronous belt pulley transmission mechanism; 19. Positioning sensor; 20. Top cylinder; 21. Baffle; 22. Lead screw; 23. Turntable; 24. Guide rod; 25. Side plate; 26. Guide wheel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4The seedling detection device in this embodiment includes an operating table 1. Two sets of oppositely distributed boxes 2 are installed on the top of the operating table 1. A three-axis moving device is installed between the boxes 2. A visual detection device 13 is installed on the vertical moving end of the three-axis moving device. A counter-movement device is installed between the boxes 2. The moving end of the counter-movement device is fixed with a side plate 25 on the left box 2. A guide rail 14 is installed on the opposite side of both side plates 25. A conveying device that moves along the inner side of the guide rail 14 is installed between the two boxes 2. Two sets of front-to-back limiting components are installed on the table surface of the operating table 1. Multiple positioning sensors 19 are installed on the operating table 1 near the rear limiting components. The positioning sensors 19 are diffuse reflection photoelectric sensors.

[0019] By adjusting the movement of the right side plate 25 through the moving device, it can adapt to the conveying needs of hard seedling trays of different sizes. The limiting component blocks the seedling tray through the baffle to realize the pre-waiting and positioning functions. After the positioning sensor 19 senses that the seedling tray is in place, the three-axis moving device drives the vision detection device 13 to complete the visual detection and recording of all seedlings on the seedling tray.

[0020] like Figure 1 , 3 4. The three-axis moving device includes a moving frame 6 slidably installed on the inner walls of two sets of housings 2. The top of the housing 2 has a slot 3 for the moving frame 6 to move. A first lead screw device 4 is installed on the inner wall of the right housing 2. The nut end of the first lead screw device 4 is fixed with a first moving block 5 connected to the moving frame 6 by screws. A second lead screw device 7 is installed on the back of the moving frame 6 and has two long holes. The nut end of the second lead screw device 7 is fixed with a U-shaped block 8 located in the long holes. A connecting plate 9 is fixed between the two ends of the U-shaped block 8. The connecting plate 9 slides with the front of the moving frame 6. A concave plate 10 is fixed on the connecting plate 9. A third lead screw device 11 is installed on the concave plate 10. The nut end of the third lead screw device 11 is fixed with a lifting plate 12 that slides with the inner wall of the concave plate 10. A vision inspection device 13 is installed on the lifting plate 12.

[0021] Once the seedling tray is moved to the designated position, the first, second, and third lead screw devices drive the moving frame 6 along the X direction, the connecting plate 9 along the Y direction, and the lifting plate 12 along the Z direction, respectively, thereby adjusting the visual detection device 13 to a suitable height and covering the detection range of all seedlings on the seedling tray.

[0022] like Figure 2-3The transfer device includes two sets of guide rods 24 fixed between two sets of boxes 2, and a lead screw 22 rotatably connected between the two sets of boxes 2. The lead screw 22 is parallel to the guide rods 24. A right side plate 25 that slides with the guide rod 24 is fixed to the nut end of the lead screw 22. The left side plate 25 is directly fixed to the left box 2. One end of the lead screw 22 extends to the outside of the right box 2 and is fixed with a turntable 23. By rotating the turntable 23, the lead screw 22 is rotated, which drives the right side plate 25 to translate along the guide rods 24, thereby adjusting the spacing of the two guide rails 14 to accommodate seedling trays of different sizes.

[0023] The conveying device includes a synchronous belt pulley transmission mechanism 18 that is rotatably connected to the two side plates 25 respectively. The left synchronous belt pulley transmission mechanism is installed on the left side plate, and the right synchronous belt pulley transmission mechanism moves synchronously with the right side plate. The two side plates 25 are fixed with guide rails 14 on opposite sides. The guide rails 14 have a U-shaped groove structure and are used to support the two sides of the seedling tray. The side plates are also equipped with multiple sets of guide wheels 26 that cooperate with the synchronous belt in the synchronous belt pulley transmission mechanism.

[0024] A drive rod 15 is rotatably connected between the two sets of housings 2. A spline sleeve slides on the drive rod 15. The spline sleeve is fixedly connected to the active synchronous pulley of the synchronous belt pulley transmission mechanism 18. The spline sleeve can slide along the slide groove of the drive rod 15 and transmit torque at the same time.

[0025] The synchronous belt surface of the synchronous belt transmission mechanism 18 is flush with the support surface of the guide rail 14, and is used to lift and transport the seedling tray. One end of the drive rod 15 located in the right box 2 is fixed with a driven bevel gear 17. A gear drive motor 16 is installed in the right box 2. The output shaft of the gear drive motor 16 is fixed with a driving bevel gear, which meshes with the driven bevel gear 17.

[0026] The gear drive motor 16 drives the drive rod 15 to rotate through bevel gear meshing. The drive rod 15 drives the active synchronous pulley of the synchronous belt pulley transmission mechanism 18 to rotate through spline sleeve engagement. The synchronous belts of the synchronous belt pulley transmission mechanisms 18 on both sides rotate synchronously, lifting the seedling tray and conveying it along the guide rail 14. The guide rail 14 realizes the left and right limit of the seedling tray, and the synchronous belt realizes the upper and lower support and conveying power.

[0027] like Figure 2 The limiting component includes two sets of upper cylinders 20 fixed on the operating table 1. Both sets of upper cylinders 20 are located between the two side guide rails 14, and the piston rods are fixed with baffles 21. The height of the baffles 21 can be higher than the support surface of the guide rails 14 to block the front end of the seedling tray.

[0028] Detection and positioning limit component: Before the seedling tray is transported to the detection area, the upper cylinder 20 of this component drives the baffle 21 to lift up until the front end of the seedling tray touches the baffle 21. After the positioning sensor 19 senses that the seedling tray is in place, it sends a signal to the control system to stop the conveying device and start the detection operation.

[0029] Pre-waiting limit component: When a seedling tray is being detected at the detection positioning limit component, the upper cylinder 20 of the pre-waiting limit component drives the baffle 21 to lift up, blocking the subsequent delivery of seedling trays and preventing multiple sets of seedling trays from stacking; when the detection is completed, the baffle 21 of the detection positioning limit component retracts, the seedling tray is delivered to the next process, and at the same time the baffle 21 of the pre-waiting limit component retracts, releasing the next set of seedling trays into the detection area.

[0030] The working principle of the above embodiments is as follows:

[0031] For rigid seedling trays of different sizes, the turntable on the outside of the right side of the box is manually rotated, which drives the lead screw in the transfer device to rotate. Since the lead screw is parallel to the guide rod, and the right side plate is fixed to the nut end of the lead screw and slides with the guide rod, the rotation of the lead screw drives the right side plate to move along the guide rod, thereby adjusting the distance between the two guide rails. At the same time, the right synchronous belt pulley transmission mechanism moves synchronously with the right side plate, and the spline sleeve on the drive rod slides along the drive rod groove to ensure the torque transmission between the synchronous belt pulley transmission mechanism and the drive rod, thus achieving the adaptation of the equipment to seedling trays of different sizes.

[0032] Then, the gear drive motor is started. The motor output shaft meshes with the driven bevel gear at the end of the drive rod through the active bevel gear, driving the drive rod to rotate. The drive rod is connected to the active synchronous pulley of the synchronous belt drive mechanism on both sides through the spline sleeve. The spline sleeve can slide along the groove of the drive rod to adapt to the change of the guide rail spacing, and can stably transmit torque, thereby driving the synchronous belt of the synchronous belt drive mechanism on both sides to rotate synchronously. The seedling tray is placed on the U-shaped groove support surface of the guide rail on both sides. The surface of the synchronous belt is flush with the support surface of the guide rail, realizing the upper and lower support of the seedling tray. At the same time, the operation of the synchronous belt generates conveying power, driving the seedling tray to move along the guide rail towards the detection area. The guide rail limits the two sides of the seedling tray to ensure the conveying accuracy.

[0033] The device is equipped with two sets of limit components at the front and rear, which respectively realize the pre-wait and detection positioning functions:

[0034] Pre-waiting limit: When there is already a seedling tray being tested in the detection area, the upper cylinder of the pre-waiting limit component is activated, which drives the baffle to rise and block the subsequent delivery of seedling trays, thus preventing multiple sets of seedling trays from stacking in the detection area.

[0035] Detection and positioning: Before the seedling tray is transported to the detection area, the upper cylinder of the detection and positioning limit component drives the baffle to rise. After the front end of the seedling tray comes into contact with the baffle, it stops moving. At this time, the diffuse reflection photoelectric sensor on the back of the operating table senses that the seedling tray is in place and immediately sends a positioning signal to the control system. After receiving the signal, the control system stops the gear drive motor, the conveying device stops running, and the detection and positioning of the seedling tray is completed.

[0036] After receiving the positioning signal, the control system starts the three-axis traverse device:

[0037] The first lead screw device drives the moving frame to move back and forth;

[0038] The second lead screw device drives the connecting plate to move left and right;

[0039] The third lead screw device drives the lifting plate to move up and down;

[0040] Through the coordinated action of three sets of lead screw devices, the visual inspection device is adjusted to a suitable inspection height and accurately covers the inspection range of all seedlings on the seedling tray, completing the visual imaging, defect identification and data recording of the seedlings.

[0041] Once the single seedling tray test is completed, the control system sends a signal:

[0042] The upper cylinder of the detection positioning and limiting component retracts, and the baffle descends to below the guide rail support surface;

[0043] The gear-driven motor restarts, and the synchronous belt transports the inspected seedling trays to the next process.

[0044] The upper cylinder of the pre-waiting limit component retracts synchronously, the baffle descends, and the next set of seedling trays to be tested enters the testing area, and the equipment enters the next testing cycle, realizing continuous automated operation.

[0045] The entire workflow is now complete, and anything not described in detail in this specification is existing technology known to those skilled in the art.

[0046] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seedling detection device, comprising an operating table (1), characterized in that: The top of the operating table (1) is fixed with two sets of oppositely distributed boxes (2). A three-axis moving device and a countermoving device are provided between the two sets of boxes (2). The vertical moving end of the three-axis moving device is equipped with a vision inspection device (13). The moving end of the countermoving device is fixed with a side plate (25) on the left side of the box (2). Guide rails (14) are installed on opposite sides of the side plates (25). A conveying device that moves along the inner side of the guide rail (14) is provided between the two sets of boxes (2). Two sets of front and rear distributed limiting components are installed on the table surface of the operating table (1). Multiple positioning sensors (19) are installed on the operating table (1) near the rear limiting components. The positioning sensors (19) are electrically connected to the conveying device and the three-axis moving device.

2. The seedling detection device according to claim 1, characterized in that: The three-axis moving device includes a moving frame (6) slidably mounted between the inner walls of two sets of housings (2). The top of the housing (2) has a slot (3) for the moving frame (6) to pass through. A first lead screw device (4) is installed on the inner wall of the right side of the housing (2). The nut end of the first lead screw device (4) is fixed with a first moving block (5) bolted to the moving frame (6). A second lead screw device (7) is installed on the back of the moving frame (6), and the moving frame (6) has two parallel elongated holes. The nut end of the rod device (7) is fixed with a U-shaped block (8) located in the elongated hole. A connecting plate (9) that slides with the front of the moving frame (6) is fixed between the two ends of the U-shaped block (8). A concave plate (10) is fixed on the connecting plate (9). A third lead screw device (11) is installed on the concave plate (10). A lifting plate (12) that slides with the inner wall of the concave plate (10) is fixed at the nut end of the third lead screw device (11). The visual inspection device (13) is installed at the bottom of the lifting plate (12).

3. The seedling detection device according to claim 1, characterized in that: The displacement device includes two sets of guide rods (24) installed between two sets of housings (2) and a lead screw (22) rotatably connected between the two sets of housings (2). The lead screw (22) is arranged parallel to the guide rods (24). The nut end of the lead screw (22) is fixed with the right side plate (25) which slides with the guide rod (24). The left side plate (25) is fixed on the left housing (2). One end of the lead screw (22) extends to the outside of the right housing (2) and is fixed with a turntable (23).

4. The seedling detection device according to claim 1, characterized in that: The conveying device includes a synchronous belt pulley transmission mechanism (18) rotatably connected to two side plates (25). The left synchronous belt pulley transmission mechanism (18) is fixedly mounted on the left side plate (25), and the right synchronous belt pulley transmission mechanism (18) moves synchronously with the right side plate (25). The guide rail (14) has a U-shaped groove structure, and multiple sets of guide wheels (26) that roll with the synchronous belt in the synchronous belt pulley transmission mechanism (18) are rotatably mounted on the side plate (25). A drive rod is rotatably connected between the two sets of boxes (2). 15), a spline sleeve is slidably provided on the drive rod (15), the spline sleeve is key connected to the active synchronous pulley of the synchronous belt pulley transmission mechanism (18), the synchronous belt surface of the synchronous belt pulley transmission mechanism (18) is flush with the support surface of the guide rail (14), one end of the drive rod (15) located in the right box (2) is fixed with a driven bevel gear (17), a gear drive motor (16) is installed in the right box (2), and the output shaft of the gear drive motor (16) is fixed with an active bevel gear that meshes with the driven bevel gear (17).

5. The seedling detection device according to claim 1, characterized in that: The limiting component includes an upper cylinder (20) installed on the operating table (1). The upper cylinder (20) is located between the two guide rails (14), and a baffle (21) is fixed at the top of the piston rod of the upper cylinder (20). After the baffle (21) is raised, its top is higher than the support surface of the guide rail (14). The front limiting component is a pre-waiting limiting component, and the rear limiting component is a detection and positioning limiting component. The positioning sensor (19) is electrically connected to the upper cylinder (20) of the detection and positioning limiting component and the gear drive motor (16). The upper cylinders (20) of the two limiting components are linked and controlled.

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