Seed vigor detection device based on hyperspectral imaging and method thereof

Abstract

The invention discloses a seed vigor detection device based on hyperspectral imaging and a method thereof, and relates to the technical field of seed detection. The seed vigor detection device based on hyperspectral imaging comprises a conveying device used for conveying seeds, a seed single granulation device arranged on the conveying device, a hyperspectral imaging device used for detecting seed vigor and a seed grading device, and a plurality of discharging pipes are arranged at the bottom of one side of the conveying device through a protection plate; the seed grading device comprises a distribution assembly, a plurality of grading pipes and seed distribution boxes matched with the grading pipes in number. The seed grading device has the advantages that the seeds can be quickly and accurately graded so as to ensure that the seeds can accurately enter the corresponding seed separation boxes, and the problems that certain time is needed when the inclination angle of a grading pipeline is large, so that the seeds possibly flow out in the inclination process of the grading pipeline and enter the wrong seed separation box, and the working efficiency is increased are solved. And when the inclination speed of the grading pipeline is too high, the seeds can be thrown out and fall out of the seed separating box.

Description

Technical Field

[0001] The present invention relates to the technical field of seed detection, and in particular to a seed vitality detection device and method based on hyperspectral imaging. Background Art

[0002] Seed quality determines crop quality and yield. Modern agricultural technologies, such as precision seeding, are placing increasing demands on seed vigor and other qualities. Seed vigor is a crucial indicator of overall seed quality. Vigor testing and grading of seeds before sowing are crucial for effectively ensuring germination rates, growth potential, promoting fully mechanized production models, and ultimately ensuring food security.

[0003] Hyperspectral imaging technology, based on numerous narrow-band image data, combines imaging and spectral techniques to detect the two-dimensional geometric space and one-dimensional spectral information of a target, acquiring continuous, narrow-band image data with high spectral resolution. By analyzing the spectral reflectance characteristics of an object's surface across different bands, information about the object's properties and quality can be obtained. In seed testing, analyzing the spectral reflectance of the seed surface can be used to assess seed quality and vigor.

[0004] For example, the patent with publication number: CN116106311A discloses a multi-index detection and grading system and method for seed vitality. By using a hyperspectral imaging system to scan single-grain separated seeds, multiple indicators including the presence or absence of external physical damage and internal chemical damage can be scanned. By combining the hyperspectral imaging system with a seed singulation device, a seed conveying device, and a seed grading pipeline, automatic detection of multiple indicators of single-grain seed vitality can be achieved, thereby improving the efficiency of seed detection and grading and saving manpower and labor costs.

[0005] At present, in the prior art, after the seed grading pipe receives the seeds delivered by the seed conveying device, the seed grading pipe is controlled to swing to achieve an angle of inclination, so that each seed falls into a multi-level seed sorting box. However, when the inclination angle of the grading pipe is large, it takes a certain amount of time, so that the seeds may flow out during the inclination of the grading pipe and enter the wrong seed sorting box. When the inclination speed of the grading pipe is too fast, the seeds may be thrown out and fall outside the seed sorting box. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention provides a seed vitality detection device and method based on hyperspectral imaging, which solves the problem that when the grading pipe is tilted at a large angle, it takes a certain amount of time, causing the seeds to flow out during the tilting process of the grading pipe and enter the wrong seed box; when the grading pipe tilts too quickly, the seeds may be thrown out and fall outside the seed box.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a seed vitality detection device based on hyperspectral imaging, comprising a conveying device for conveying seeds, a seed singulation device arranged on the conveying device, a hyperspectral imaging device for detecting seed vitality, and a seed grading device. A plurality of feed pipes are provided at the bottom of one side of the conveying device through a guard plate. The seed grading device comprises a distribution component, a plurality of grading tubes and a seed sorting box adapted to the number thereof. The distribution component is provided at the bottom of the feed pipe, and each of the grading tubes is provided at the bottom of the distribution component. Each of the seed sorting boxes is respectively provided at the bottom discharge port of each grading tube. The distribution component is used to receive the seeds dropped from the feed pipe and distribute them to the corresponding grading tubes according to the detection results; a fixing component is provided on the distribution component, and the fixing component is used to fix the seeds received by the distribution component; a cache device is provided on the grading tube, and the cache device is used to temporarily store the seeds after the seed sorting box is full.

[0008] Furthermore, the distribution assembly includes a turntable, a support frame and a variable speed motor that are adapted to the number of feed pipes. The turntable is arranged at the bottom of the feed pipe, the grading tube is movably connected to the bottom surface of the turntable, each of the turntables is connected to each other, the support frame is connected to the turntables on both sides through bearings, the variable speed motor is installed on one side of the support frame through a flange, the output shaft of the variable speed motor is fixedly connected to a turntable on the sidemost side, and the surface of the turntable is provided with a plurality of receiving grooves in a circular array, and the receiving grooves are used to receive seeds dropped from the feed pipe.

[0009] Furthermore, the fixed component includes an exhaust fan, a blocking orifice plate and a connecting pipe. A ventilation cavity is opened in the central part of each turntable. The two ends of the connecting pipe are respectively fixedly connected to the two adjacent turntables. The connecting pipe is connected to the ventilation cavity. The exhaust fan is fixedly set on the surface of a turntable away from the variable speed motor, and the exhaust port of the exhaust fan is connected to the ventilation cavity; the inside of the turntable is provided with connecting holes that are adapted to the number of storage slots, one end of the connecting hole is connected to the ventilation cavity, and the other end of the connecting hole is connected to the storage slot. The blocking orifice plate is set at the inner bottom of the storage slot, and a closing component is provided in each of the connecting holes.

[0010] Furthermore, the closing assembly includes an electromagnet, a fixed iron block, a closing plate and a return spring, the electromagnet is fixedly connected to the inner wall of the connecting hole through a support rod, the size of the electromagnet is smaller than the connecting hole, and the electromagnet is electrically connected to the hyperspectral imaging device through a controller; the closing plate is arranged in the ventilation cavity, the fixed iron block is fixedly arranged on the surface of the closing plate, the fixed iron block is arranged on one side of the electromagnet, the electromagnet and the fixed iron block are both arranged in a ring shape, one end of the return spring is fixedly connected to the inner wall of the electromagnet, and the other end of the return spring is fixedly connected to the inner wall of the fixed iron block.

[0011] Furthermore, a transmission rod is fixedly provided on the surface of the closing plate, the other end of the transmission rod is fixedly connected to the blocking hole plate, the blocking hole plate is slidably connected to the inner wall of the storage groove, and a sliding groove is provided on the side of the connecting hole, and the transmission rod is slidably inserted into the inner wall of the sliding groove.

[0012] Furthermore, the cache assembly includes a cover plate and a drive assembly, the cover plate is arranged on one side of the bottom of one of the grading tubes, the size of the cover plate is larger than the bottom outlet of the grading tube, the drive assembly is arranged on the surface of the support frame, and the drive assembly is used to drive the cover plate to close the bottom outlet of the grading tube, so that the seeds are temporarily stored in the grading tube.

[0013] Furthermore, the drive assembly includes a screw rod, a slider, a guide rod and a drive motor, the drive motor is arranged on the surface of the support frame through a mounting plate, one end of the screw rod is fixedly arranged on the surface of the drive motor output shaft, the other end of the screw rod is connected to the surface of the support frame through a bearing, and the guide rod is fixedly arranged on the side of the support frame away from the screw rod; there are two sliders, and the two sliders are respectively arranged on both sides of the cover plate, one of the sliders is threadedly sleeved on the surface of the screw rod, and the other slider is slidably sleeved on the surface of the guide rod.

[0014] Furthermore, an infrared sensor is provided on one side of each seed box through a placement rack, a detection hole is opened on the top of one side of the seed box, and the infrared sensor is electrically connected to the drive motor through a controller. The infrared sensor is used to detect whether the seeds in the seed box are full.

[0015] Furthermore, a plurality of buffer plates are fixedly arranged inside each grading tube, and each two buffer plates are cross-arranged in an eight-shaped pattern, and the buffer plates are used to buffer seeds when they fall.

[0016] A seed vitality detection method based on hyperspectral imaging includes the following steps: separating individual seeds through a single-grain device, and dropping the individual seeds into corresponding seed-dropping holes on a conveying device through a discharge port; the conveying device conveys the seeds to be detected to a detection area, a hyperspectral imaging device detects the vitality of each seed arriving at the detection area, and grades each seed according to the detection result, and transmits the classification result to a controller corresponding to the electromagnet; a variable speed motor drives the turntable to rotate, and adjusts the speed according to the transmission speed of the conveying device, and the seeds after detection pass through a guard plate. The seeds are fed into the rotating disk and the feed pipe falls into each receiving slot on the turntable in turn; the exhaust fan extracts the gas in the receiving slot through the ventilation cavity and the connecting hole to form a negative pressure, thereby adsorbing the seeds on the surface of the blocking plate; when the turntable drives the seeds to rotate to the inlet of the grading tube of the corresponding grade, the controller controls the electromagnet corresponding to the seed to be energized and magnetically attracts the fixed iron block, so that the fixed iron block drives the closing plate to close the connecting hole and the ventilation cavity, so that the negative pressure disappears and the adsorption of the seeds is disconnected, and the seeds fall under their own gravity; after receiving the discharged seeds, the grading tube guides them into the seed sorting box of the corresponding grade.

[0017] The present invention has the following beneficial effects:

[0018] (1) The seed vitality detection device based on hyperspectral imaging is provided with a distribution component. When the distribution component rotates, it receives the detected seeds in turn, adjusts the rotation speed according to the transmission speed of the transmission device, and then transmits the received seeds to the corresponding seed separation box according to the grading structure, thereby achieving the advantage of being able to quickly and accurately grade the seeds to ensure that the seeds can accurately enter the corresponding seed separation box. It solves the problem that when the grading pipe is tilted at a large angle, it takes a certain amount of time, so that the seeds may flow out during the tilting process of the grading pipe and enter the wrong seed separation box. When the grading pipe is tilted too quickly, the seeds may be thrown out and fall outside the seed separation box.

[0019] (2) The seed vitality detection device based on hyperspectral imaging detects the storage conditions in the seed box by setting a cache component. When the stored seeds are flush with the detection hole, the infrared sensor detects the seeds, and then starts the driving motor through the controller, and drives the cover plate to the grading tube on the top of a full seed box through the screw rod and the slider, so that the grading tube can be automatically closed. After that, the seed box is replaced. During the replacement, the seeds will be temporarily stored in the grading tube, so that the seed box can be replaced without stopping the machine, thereby improving work efficiency.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1Schematic diagram of the overall structure of the seed vitality detection device based on hyperspectral imaging of the present invention;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the transmission device of the seed vitality detection device based on hyperspectral imaging of the present invention;

[0023] Figure 3 This is a structural schematic diagram of a seed grading device of a seed vitality detection device based on hyperspectral imaging according to the present invention;

[0024] Figure 4 This is a cross-sectional view of the turntable structure of the seed vitality detection device based on hyperspectral imaging of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the enclosed component of the seed vitality detection device based on hyperspectral imaging of the present invention;

[0026] Figure 6 This is a schematic structural diagram of the grading tube portion of the seed vitality detection device based on hyperspectral imaging of the present invention;

[0027] Figure 7 This is a structural diagram of a seed separation box of a seed vitality detection device based on hyperspectral imaging according to the present invention;

[0028] Figure 8 This is a flow chart of the seed vitality detection method based on hyperspectral imaging of the present invention.

[0029] In the figure, 1. conveying device; 2. hyperspectral imaging device; 3. guard plate; 4. feeding pipe; 5. grading pipe; 6. seed box; 7. turntable; 8. support frame; 9. variable speed motor; 10. storage tank; 11. exhaust fan; 12. blocking plate; 13. connecting pipe; 14. ventilation chamber; 15. connecting hole; 16. electromagnet; 17. fixed iron block; 18. closing plate; 19. reset spring; 20. transmission rod; 21. slide; 22. cover plate; 23. screw rod; 24. slider; 25. guide rod; 26. driving motor; 27. infrared sensor; 28. detection hole; 29. buffer plate. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] See also Figure 1-Figure 7 , an embodiment of the present invention provides a technical solution: a seed vitality detection device based on hyperspectral imaging, comprising a conveying device 1 for conveying seeds, a seed singulation device arranged on the conveying device 1, a hyperspectral imaging device 2 for detecting seed vitality, and a seed grading device, a plurality of feed pipes 4 are provided on the bottom of one side of the conveying device 1 through a guard plate 3, the seed grading device comprises a distribution component, a plurality of grading tubes 5 and a seed box 6 adapted to the number thereof, the distribution component is arranged at the bottom of the feed pipe 4, each grading tube 5 is arranged at the bottom of the distribution component, and each seed box 6 is respectively arranged at the bottom discharge port of each grading tube 5, the distribution component is used to receive the seeds dropped from the feed pipe 4 and distribute them to the corresponding grading tube 5 according to the detection results; a fixing component is arranged on the distribution component, the fixing component is used to fix the seeds received by the distribution component; a cache device is arranged on the grading tube 5, and the cache device is used to temporarily store the seeds after the seed box 6 is full.

[0033] Specifically, the distribution component includes a turntable 7, a support frame 8 and a speed-changing motor 9 that are adapted to the number of the discharge pipes 4. The turntable 7 is arranged at the bottom of the discharge pipe 4. The grading pipe 5 is movably connected to the bottom surface of the turntable 7. Each turntable 7 is connected to each other. The support frame 8 is connected to the turntables 7 on both sides through bearings. The speed-changing motor 9 is installed on one side of the support frame 8 through a flange. The output shaft of the speed-changing motor 9 is fixedly connected to the turntable 7 on the most side. The surface of the turntable 7 is provided with a plurality of receiving grooves 10 in a circular array. The receiving grooves 10 are used to receive seeds dropped from the discharge pipe 4.

[0034] In this embodiment, the variable speed motor 9 is started by the switch, and the variable speed motor 9 drives the turntable 7 to rotate on the support frame 8 through the bearing, and adjusts the rotation speed of the turntable 7 according to the transmission speed of the conveying device 1. The seeds after inspection pass through the guard plate 3 and the discharge pipe 4 and fall into each storage slot 10 on the turntable 7 in turn.

[0035] Specifically, the fixed component includes an exhaust fan 11, an obstructing orifice plate 12 and a connecting pipe 13. A ventilation cavity 14 is provided in the center of each turntable 7. The two ends of the connecting pipe 13 are respectively fixedly connected to the two adjacent turntables 7. The connecting pipe 13 is connected to the ventilation cavity 14. The exhaust fan 11 is fixedly set on the surface of a turntable 7 away from the variable speed motor 9, and the exhaust port of the exhaust fan 11 is connected to the ventilation cavity 14; the turntable 7 is provided with connecting holes 15 whose number matches the number of the receiving slots 10, one end of the connecting hole 15 is connected to the ventilation cavity 14, and the other end of the connecting hole 15 is connected to the receiving slot 10, the obstructing orifice plate 12 is set at the inner bottom of the receiving slot 10, and a closing component is provided in each connecting hole 15.

[0036] In this embodiment, the exhaust fan 11 is started by switching on the switch, and the exhaust fan 11 extracts the gas from the ventilation chamber 14 and the connecting hole 15, and then extracts the gas in the storage tank 10 through the blocking hole plate 12, thereby forming a negative pressure. After the seeds enter the storage tank 10, the seeds are adsorbed on the surface of the blocking hole plate 12 under the suction force of the exhaust fan 11. Every two turntables 7 are connected by a connecting pipe 13, so that the exhaust fan 11 extracts the gas in each turntable 7 through the connecting pipe 13, which is convenient for fixing the seeds in the storage tank 10.

[0037] Specifically, the closing assembly includes an electromagnet 16, a fixed iron block 17, a closing plate 18 and a return spring 19. The electromagnet 16 is fixedly connected to the inner wall of the connecting hole 15 through a support rod. The size of the electromagnet 16 is smaller than the connecting hole 15. The electromagnet 16 is electrically connected to the hyperspectral imaging device 2 through a controller; the closing plate 18 is arranged in the ventilation cavity 14, and the fixed iron block 17 is fixedly arranged on the surface of the closing plate 18. The fixed iron block 17 is arranged on one side of the electromagnet 16. The electromagnet 16 and the fixed iron block 17 are both arranged in a ring shape. One end of the return spring 19 is fixedly connected to the inner wall of the electromagnet 16, and the other end of the return spring 19 is fixedly connected to the inner wall of the fixed iron block 17.

[0038] In this embodiment, when the turntable 7 drives the seeds in the storage groove 10 to rotate to the entrance of the grading tube 5 of the corresponding level, the controller controls the electromagnet 16 to energize, so that the electromagnet 16 will attract the fixed iron block 17 under the action of magnetism, so that the fixed iron block 17 is magnetically connected to the electromagnet 16, and the fixed iron block 17 drives the reset spring 19 to elastically compress. At the same time, the fixed iron block 17 will drive the closing plate 18 on the surface to directly close the connecting hole 15 and the ventilation cavity 14, thereby disconnecting the connecting hole 15 from the ventilation cavity 14, and the outside air enters the connecting hole 15 and the storage groove 10 to balance the air pressure, so that the negative pressure disappears, thereby eliminating the suction force on the seeds, and the seeds will fall under their own seeds. After that, a grading tube 5 of the corresponding level will receive the seeds, which is convenient for unlocking the seeds.

[0039] Specifically, a transmission rod 20 is fixedly provided on the surface of the closing plate 18, the other end of the transmission rod 20 is fixedly connected to the blocking hole plate 12, the blocking hole plate 12 is slidingly connected to the inner wall of the storage groove 10, and a sliding groove 21 is opened on the side of the connecting hole 15, and the transmission rod 20 is slidably inserted into the inner wall of the sliding groove 21.

[0040] In this embodiment, when the electromagnet 16 attracts the fixed iron block 17 under the action of magnetism, the fixed iron block 17 drives the closing plate 18 to move, and at the same time the closing plate 18 drives the blocking hole plate 12 to move through the transmission rod 20. The transmission rod 20 slides along the inner wall of the slide groove 21, and at the same time the blocking hole plate 12 pushes the seeds out of the receiving groove 10, thereby accelerating the movement of the seeds and enabling the turntable 7 to reach a faster rotation speed, thereby improving the detection efficiency.

[0041] Specifically, the cache assembly includes a cover plate 22 and a drive assembly. The cover plate 22 is arranged on one side of the bottom of one of the grading tubes 5. The size of the cover plate 22 is larger than the bottom outlet of the grading tube 5. The drive assembly is arranged on the surface of the support frame 8. The drive assembly is used to drive the cover plate 22 to close the bottom outlet of the grading tube 5, so that the seeds are temporarily stored in the grading tube 5.

[0042] Specifically, the drive assembly includes a screw rod 23, a slider 24, a guide rod 25 and a drive motor 26. The drive motor 26 is arranged on the surface of the support frame 8 through a mounting plate. One end of the screw rod 23 is fixedly arranged on the surface of the output shaft of the drive motor 26, and the other end of the screw rod 23 is connected to the surface of the support frame 8 through a bearing. The guide rod 25 is fixedly arranged on the side of the support frame 8 away from the screw rod 23; there are two sliders 24, and the two sliders 24 are respectively arranged on both sides of the cover plate 22, one of the sliders 24 is threadedly sleeved on the surface of the screw rod 23, and the other slider 24 is slidably sleeved on the surface of the guide rod 25.

[0043] In this embodiment, when the seeds in the seed box 6 are fully stored, the drive motor 26 is started by the switch, and the drive motor 26 drives the screw rod 23 to rotate. The screw rod 23 drives the cover plate 22 to move through one of the sliders 24, so that the cover plate 22 moves along the surface of the guide rod 25 through another slide groove 21, and the cover plate 22 moves to the grading tube 5 on the top of a full seed box 6, so that the seed box 6 seals the bottom opening of the grading tube 5, and then the seed box 6 is replaced. During the replacement, the seeds will be temporarily stored in the grading tube 5. After the replacement, the drive motor 26 drives the cover plate 22 to open, so that the seeds fall into the seed box 6, so that the seed box 6 can be replaced without stopping, thereby improving work efficiency.

[0044] Specifically, an infrared sensor 27 is provided on one side of each seed box 6 through a placement rack, a detection hole 28 is opened on the top of one side of the seed box 6, and the infrared sensor 27 is electrically connected to the drive motor 26 through the controller. The infrared sensor 27 is used to detect whether the seeds in the seed box 6 are full.

[0045] In this embodiment, an infrared sensor 27 is provided, and the infrared sensor 27 passes through the detection hole 28 on one side of the seed box 6 to detect the storage situation in the seed box 6. When the stored seeds are flush with the detection hole 28, the infrared sensor 27 detects the seeds, and then the drive motor 26 is started by the controller, and the cover plate 22 is driven by the screw rod 23 and the slider 24 to the grading tube 5 on the top of a full seed box 6, so that the grading tube 5 can be automatically closed, and an alarm can be provided to remind the staff to replace the seed box 6.

[0046] Specifically, a plurality of buffer plates 29 are fixedly provided inside each grading tube 5 , and each two buffer plates 29 are cross-arranged in an eight-shaped pattern. The buffer plates 29 are used to buffer seeds when they fall.

[0047] In this embodiment, by setting a buffer plate 29 in the grading tube 5, the seeds enter the grading tube 5 or fall downward along the surface of multiple buffer plates 29. The buffer plate 29 can provide a certain buffering for the seeds, reducing the possibility of seed loss when falling, and a rubber pad can be set on the buffer plate 29 to further improve the caching effect.

[0048] A seed vitality detection method based on hyperspectral imaging includes the following steps: separating individual seeds through a single granulation device, and dropping the individual seeds into corresponding seed dropping holes on a conveyor 1 through a discharge port; the conveyor 1 conveys the seeds to be detected to a detection area, a hyperspectral imaging device 2 detects the vitality of each seed arriving at the detection area, and grades each seed according to the detection result, and transmits the classification result to a controller corresponding to an electromagnet 16; a variable speed motor 9 drives a turntable 7 to rotate, and adjusts the speed according to the transmission speed of the conveyor 1, and the seeds after detection fall into the In each receiving slot 10 on the turntable 7; the exhaust fan 11 extracts the gas in the receiving slot 10 through the ventilation chamber 14 and the connecting hole 15 to form a negative pressure, thereby adsorbing the seeds on the surface of the blocking hole plate 12; when the turntable 7 drives the seeds to rotate to the inlet of the grading tube 5 of the corresponding grade, the controller controls the electromagnet 16 corresponding to the seed to be energized and magnetically attracts the fixed iron block 17, so that the fixed iron block 17 drives the closing plate 18 to close the connecting hole 15 and the ventilation chamber 14, so that the negative pressure disappears and the adsorption of the seeds is disconnected, and the seeds fall under their own gravity; after receiving the unloaded seeds, the grading tube 5 guides them into the seed sorting box 6 of the corresponding grade.

[0049] When in use, the conveying device 1 includes a conveying belt, a pulley, a motor and a shell. The surface array of the conveying belt is provided with a plurality of seed-dropping holes for placing seeds. The seeds are separated into single grains by a single-grain device, and the single seeds are dropped into the corresponding seed-dropping holes on the conveying device 1 through the discharge port. Then the conveying device 1 conveys the seeds to be tested to the detection area. The hyperspectral imaging device 2 includes a hyperspectral camera, a light source and other components. The hyperspectral imaging device 2 can simultaneously detect the appearance indicators of seeds and the internal quality indicators of seeds. The appearance indicators of seeds can be damage, color, etc. The internal quality indicators of seeds can be whether they are heat damaged, aged, frostbitten, the content of internal components, etc. After the hyperspectral imaging device 2 completes the vitality test of each seed, each seed is graded according to the test results, and then the grading results are transmitted to the controller corresponding to the electromagnet 16.

[0050] Afterwards, the variable speed motor 9 is started by the switch, and the variable speed motor 9 drives the turntable 7 to rotate on the support frame 8 through the bearing, and adjusts the speed of the turntable 7 according to the conveying speed of the conveying device 1. The guard plate 3 is fixedly connected to one side of the outer shell of the conveying device 1, and the discharge pipe 4 is fixedly arranged on the bottom side of the guard plate 3. The seeds after inspection pass through the guard plate 3 and the discharge pipe 4 and fall into each storage groove 10 on the turntable 7 in turn. At the same time, the exhaust fan 11 is started by the switch, and the exhaust fan 11 extracts the gas from the ventilation cavity 14 and the connecting hole 15, and then extracts the gas in the storage groove 10 through the blocking orifice plate 12, thereby forming a negative pressure. After the seeds enter the storage groove 10, the suction force of the exhaust fan 11 causes the seeds to be adsorbed on the surface of the blocking orifice plate 12. Every two turntables 7 are connected by a connecting pipe 13, so that the exhaust fan 11 extracts the gas in each turntable 7 through the connecting pipe 13, and the variable speed motor 9 drives multiple turntables 7 to rotate at the same time through the connecting pipe 13.

[0051] The plurality of grading tubes 5 are connected by fixed rods, and the grading tubes 5 on both sides are fixedly connected to the support frame 8 by fixed rods. When the turntable 7 drives the seeds in the storage tank 10 to rotate to the entrance of the grading tube 5 of the corresponding grade in turn, the controller controls the electromagnet 16 to be energized, so that the electromagnet 16 will attract the fixed iron block 17 under the action of magnetism, so that the fixed iron block 17 is magnetically connected to the electromagnet 16. At the same time, the fixed iron block 17 will drive the closing plate 18 on the surface to directly close the connecting hole 15 and the ventilation cavity 14, so that the connecting hole 15 is disconnected from the ventilation cavity 14, and the outside air enters the connecting hole 15 and the storage tank 10. The internal balanced air pressure causes the negative pressure to disappear, thereby eliminating the suction on the seeds. The seeds will fall under their own seeds, and then a grading tube 5 of the corresponding level will receive the seeds. Then the seeds will fall into the seeding box 6 of the corresponding level through the grading tube 5. After the seeds are separated from the storage groove 10, the controller controls the electromagnet 16 to cut off the power, so that under the elastic reset of the reset spring 19, the fixed iron block 17 and the closing plate 18 are driven to open, so that the connecting hole 15 is connected to the ventilation chamber 14, and the seeds are graded and stored, so as to achieve the ability to quickly and accurately grade the seeds to ensure that the seeds can accurately enter the corresponding seeding box 6.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A seed vitality detection device based on hyperspectral imaging, comprising a conveying device (1) for conveying seeds, a seed singulation device arranged on the conveying device (1), a hyperspectral imaging device (2) for detecting seed vitality, and a seed grading device, wherein a plurality of discharge pipes (4) are arranged on the bottom of one side of the conveying device (1) through a guard plate (3), and the device is characterized in that: The seed grading device comprises a distribution component, a plurality of grading tubes (5) and a seed sorting box (6) adapted to the number of the grading tubes, wherein the distribution component is arranged at the bottom of a feed tube (4), each of the grading tubes (5) is arranged at the bottom of the distribution component, and each of the seed sorting boxes (6) is respectively arranged at the bottom discharge port of each grading tube (5). The distribution component is used to receive seeds dropped from the feed tube (4) and distribute them to corresponding grading tubes (5) according to detection results. A fixing component provided on the distribution component, the fixing component being used to fix the seeds received by the distribution component; A buffer device is provided on the grading pipe (5), and is used for temporarily storing seeds after the seed box (6) is full.

2. The seed vitality detection device based on hyperspectral imaging according to claim 1, characterized in that: The distribution assembly comprises a turntable (7) adapted to the number of the discharge pipes (4), a support frame (8) and a variable speed motor (9); the turntable (7) is arranged at the bottom of the discharge pipe (4); the grading pipe (5) is movably connected to the bottom surface of the turntable (7); each of the turntables (7) is connected to each other; the support frame (8) is connected to the turntables (7) on both sides through bearings; the variable speed motor (9) is installed on one side of the support frame (8) through a flange; the output shaft of the variable speed motor (9) is fixedly connected to a turntable (7) on the side most; the surface of the turntable (7) is provided with a plurality of receiving grooves (10) in a ring array; the receiving grooves (10) are used to receive seeds dropped from the discharge pipe (4).

3. The seed vitality detection device based on hyperspectral imaging according to claim 2, characterized in that: The fixed assembly comprises an exhaust fan (11), a blocking orifice plate (12) and a connecting pipe (13); a ventilation cavity (14) is provided at the center of each of the turntables (7); both ends of the connecting pipe (13) are fixedly connected to two adjacent turntables (7), respectively; the connecting pipe (13) is communicated with the ventilation cavity (14); the exhaust fan (11) is fixedly arranged on the surface of a turntable (7) away from the variable speed motor (9); and the exhaust port of the exhaust fan (11) is communicated with the ventilation cavity (14); The turntable (7) is provided with a number of communicating holes (15) matching the number of the receiving slots (10), one end of the communicating hole (15) is connected to the ventilation cavity (14), and the other end of the communicating hole (15) is connected to the receiving slot (10), the blocking orifice plate (12) is arranged at the inner bottom of the receiving slot (10), and a sealing component is provided in each communicating hole (15).

4. The seed vitality detection device based on hyperspectral imaging according to claim 3, characterized in that: The sealing assembly comprises an electromagnet (16), a fixed iron block (17), a sealing plate (18) and a return spring (19); the electromagnet (16) is fixedly connected to the inner wall of the communication hole (15) via a support rod; the size of the electromagnet (16) is smaller than the communication hole (15); and the electromagnet (16) is electrically connected to the hyperspectral imaging device (2) via a controller; The closing plate (18) is arranged in the ventilation cavity (14), the fixed iron block (17) is fixedly arranged on the surface of the closing plate (18), the fixed iron block (17) is arranged on one side of the electromagnet (16), the electromagnet (16) and the fixed iron block (17) are both arranged in an annular shape, one end of the return spring (19) is fixedly connected to the inner side wall of the electromagnet (16), and the other end of the return spring (19) is fixedly connected to the inner side wall of the fixed iron block (17).

5. The seed vitality detection device based on hyperspectral imaging according to claim 4, characterized in that: A transmission rod (20) is fixedly provided on the surface of the closing plate (18), the other end of the transmission rod (20) is fixedly connected to the blocking hole plate (12), the blocking hole plate (12) is slidably connected to the inner side wall of the receiving groove (10), and a sliding groove (21) is provided on the side of the connecting hole (15), and the transmission rod is slidably inserted into the inner side wall of the sliding groove (21).

6. The seed vitality detection device based on hyperspectral imaging according to claim 2, characterized in that: The cache assembly comprises a cover plate (22) and a drive assembly, wherein the cover plate (22) is arranged on one side of the bottom of one of the grading tubes (5), the size of the cover plate (22) is larger than the bottom outlet of the grading tube (5), and the drive assembly is arranged on the surface of the support frame (8), and the drive assembly is used to drive the cover plate (22) to close the bottom outlet of the grading tube (5), so that the seeds are temporarily stored in the grading tube (5).

7. The seed vitality detection device based on hyperspectral imaging according to claim 6, characterized in that: The driving assembly comprises a screw rod (23), a slider (24), a guide rod (25) and a driving motor (26); the driving motor (26) is arranged on the surface of the support frame (8) through a mounting plate; one end of the screw rod (23) is fixedly arranged on the surface of the output shaft of the driving motor (26); the other end of the screw rod (23) is connected to the surface of the support frame (8) through a bearing; and the guide rod (25) is fixedly arranged on a side of the support frame (8) away from the screw rod (23); Two sliders (24) are provided, and the two sliders (24) are respectively provided on both sides of the cover plate (22), one of the sliders (24) is threadedly sleeved on the surface of the screw rod (23), and the other slider (24) is slidably sleeved on the surface of the guide rod (25).

8. The seed vitality detection device based on hyperspectral imaging according to claim 7, characterized in that: An infrared sensor (27) is provided on one side of each seed box (6) through a placement rack, a detection hole (28) is provided on the top of one side of the seed box (6), and the infrared sensor (27) is electrically connected to the drive motor (26) through a controller. The infrared sensor (27) is used to detect whether the seed box (6) is full of seeds.

9. The seed vitality detection device based on hyperspectral imaging according to claim 1, characterized in that: A plurality of buffer plates (29) are fixedly arranged inside each grading tube (5), and each two buffer plates (29) are arranged crosswise in an eight-shaped pattern. The buffer plates (29) are used to buffer seeds when they fall.

10. A seed vigor detection method based on hyperspectral imaging, used in a seed vigor detection device based on hyperspectral imaging according to any one of claims 1 to 9, characterized in that: The following steps are involved: The seeds are separated into single grains by a single grain device, and the single grains are dropped into corresponding drop holes on the conveying device (1) through a discharge port; The conveying device conveys the seeds to be tested to the testing area, the hyperspectral imaging device detects the vitality of each seed arriving at the testing area, and grades each seed according to the test result and transmits the classification result to the controller corresponding to the electromagnet (16); The variable speed motor (9) drives the turntable (7) to rotate and adjusts the rotation speed according to the conveying speed of the conveying device (1). The seeds after detection pass through the guard plate (3) and the feeding pipe (4) and fall into each receiving groove (10) on the turntable (7) in sequence; The exhaust fan (11) extracts the gas in the storage tank (10) through the ventilation cavity (14) and the communication hole (15) to form a negative pressure, thereby adsorbing the seeds on the surface of the blocking plate (12); When the turntable (7) drives the seeds to rotate to the entrance of the grading tube (5) of the corresponding grade, the controller controls the electromagnet (16) corresponding to the seeds to be energized and magnetically attract the fixed iron block (17), so that the fixed iron block (17) drives the closing plate (18) to close the communication hole (15) and the ventilation cavity (14), thereby the negative pressure disappears and the adsorption of the seeds is disconnected, and the seeds fall under their own gravity; After receiving the seeds, the grading pipe (5) guides them into the seed sorting box (6) of the corresponding grade.

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