Crop seed quality detecting and grading system based on machine vision

Abstract

The invention relates to the technical field of seed quality detection, and discloses a crop seed quality detection and grading system based on machine vision, which comprises a rack frame and a conveying mechanism arranged in the rack frame, the conveying mechanism comprises conveying rollers arranged in the rack frame, a conveying belt and a driving motor used for driving the conveying belt to rotate. According to the crop seed quality detecting and grading system based on machine vision, seeds needing quality detection can be screened and graded through a screening and grading assembly in the feeding mechanism, and the to-be-detected seeds can be conveyed to a conveying belt in a quantitative and fixed-row mode through a conveying assembly in the feeding mechanism; and a plurality of strip-shaped through holes are formed in the channel frame, so that the seeds needing to be detected can be conveniently separated and conveyed, the subsequent visual detection effect is improved, and the subsequent removal work of single unqualified seeds is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seed quality detection, and in particular to a crop seed quality detection and grading system based on machine vision. Background Art

[0002] In order to ensure seed quality and increase crop yields, corresponding testing equipment is generally required to detect and process the seeds. Through seed inspection, low-quality seeds such as those with low variety purity, low germination rate, and serious pests and diseases are eliminated. After searching, the Chinese invention patent with publication number CN113458004A discloses a seed sorting device and method based on machine vision, which uses a seed conveyor belt to transmit seeds, uses an industrial camera to capture images of seeds, analyzes and judges the images through a control system, and uses machine vision and deep learning algorithms to conduct a comprehensive and integrated analysis and judgment of the appearance and shape of the seeds, including color, shape, size, texture, and location, so as to achieve accurate and intelligent optimization and grading of seeds, and then judge the quality of seeds.

[0003] When the above-mentioned machine vision inspection device performs visual inspection on seeds, in order to improve its inspection efficiency, it adopts a side-by-side conveying method to transport crop seeds, inspects them through industrial cameras, and removes unqualified seeds through a suction nozzle. However, when the above-mentioned equipment transports seeds side by side, due to the vibration of the conveying mechanism, the inspection environment factors and the movement inertia of the seeds, it is easy to cause several seeds transported side by side to gather together. However, when two or more seeds gather together, it not only affects its normal visual inspection work, but also is not conducive to the subsequent removal of unqualified seeds. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a machine vision-based crop seed quality inspection and grading system, wherein seeds requiring quality inspection can be screened and graded through the screening and grading components in the feeding mechanism, and the seeds to be inspected can be quantitatively and row-wise transmitted to the conveyor belt through the transmission components in the feeding mechanism, thereby improving the efficiency of seed inspection, and a plurality of strip openings are arranged inside the channel frame, so as to facilitate the separated transportation of seeds requiring inspection, thereby improving the effect of subsequent visual inspection and improving the subsequent removal of single unqualified seeds, thereby solving the problem that when a row of seeds is transported through the conveyor belt, due to the vibration of the conveyor belt, two or more seeds are brought together, thereby affecting the subsequent individual inspection and removal of seeds.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a machine vision-based crop seed quality detection and grading system, comprising a frame and a conveying mechanism arranged inside the frame, the conveying mechanism comprising a conveying roller, a conveying belt and a driving motor for rotating the conveying belt arranged inside the frame, a visual detection instrument for detecting crop seeds on the conveying belt is fixedly installed on the top of the frame, and a partition is arranged on the frame;

[0008] A rejecting assembly for rejecting unqualified crop seeds is disposed on one side of the top of the frame, and a feeding mechanism is disposed on the other side of the top of the frame;

[0009] The feeding mechanism comprises a screening and grading component for performing preliminary processing on the crop seeds and a transmission component for quantitatively transmitting the screened and graded crop seeds to a conveyor belt.

[0010] Preferably, the partition comprises a channel frame fixed to the top of the rack frame through a bracket, and a plurality of strip-shaped openings are arranged inside the channel frame.

[0011] Preferably, the transmission component includes a shell fixed to the top of the rack frame by a bracket, the top and bottom of the shell are conical and cylindrical respectively, the bottom of the shell is fixedly connected to a material guide frame, and a strip partition plate is arranged inside the material guide frame, an inclined baffle is fixedly connected to the top of the inner wall of the shell, a rotatable socket profiling cylinder and a cylindrical rotating brush are arranged inside the shell, and a driving member for rotating the socket profiling cylinder and the rotating brush is arranged on the back of the shell.

[0012] Preferably, the axis of the socket profiling cylinder is rotatably connected to a hollow shaft, and the hollow shaft is fixedly connected to the interior of the housing;

[0013] The outer surface of the socket profiling cylinder is provided with a plurality of groups of socket grooves for taking out crop seeds, and one side of the inner wall of the socket groove is arranged as an inclined surface.

[0014] Preferably, the inner surface of the socket profiling cylinder is provided with a plurality of gas-filled grooves, and the interiors of the plurality of gas-filled grooves are connected with the interior of the socket groove through gas-filled pipes;

[0015] The inflation pipe is inclined, and the port of the inflation pipe is located in the middle of the socket groove. The outer surface of the hollow shaft is fixedly connected to two sealing covers through two air guide tubes, and the two sealing covers are in sealing contact with the inner surface of the socket profiling cylinder.

[0016] An air pump for injecting air into the hollow shaft is installed on the housing.

[0017] Preferably, the driving member comprises a toothed ring block fixed to the inner surface of the socket profiling cylinder and a transmission motor fixed to the back of the shell, the output shaft of the transmission motor extends to the inside of the shell, and the output shaft of the transmission motor is fixedly connected to a rotating gear meshing with the inner surface of the toothed ring block;

[0018] One end of the rotating brush extends to the outside of the shell, the back of the shell is rotatably connected with an auxiliary shaft, and the auxiliary shaft is transmission-connected to the rotating brush through a belt set, and the auxiliary shaft is transmission-connected to the output shaft of the transmission motor through two meshing transmission gears.

[0019] Preferably, the screening and grading assembly comprises a grading box fixed to the top of the shell, a discharge port is provided between the grading box and the inside of the shell, an inclined screening and grading plate is fixedly connected to the inside of the grading box, and a storage hopper is fixedly connected to one side of the grading box;

[0020] A strip tube rack is fixedly connected to the top of the inner wall of the grading box, and a plurality of nozzles are provided at the bottom of the strip tube rack. A hair dryer for injecting air into the strip tube rack is fixedly connected to the top of the grading box, and the air outlet of the hair dryer is connected to the inside of the strip tube rack through an air outlet pipe. A material guide pipe is fixedly connected to the bottom of the grading box.

[0021] Preferably, the rejecting assembly comprises a U-shaped frame fixed to the top of the rack frame, and a plurality of rejecting members are arranged on the U-shaped frame;

[0022] The rejecting member comprises a negative pressure cylinder arranged on the U-shaped frame, and a material guide port is provided at the bottom of the negative pressure cylinder, and an L-shaped suction pipe is fixedly connected to the outer surface of the negative pressure cylinder;

[0023] A suction pump is fixedly connected to the U-shaped frame, and the suction end of the suction pump is connected to the inside of the negative pressure cylinders of the plurality of rejecting parts through a special-shaped pipe, and a grid frame is provided at the connection between the special-shaped pipe and the inside of the plurality of negative pressure cylinders, and the grid frame is flush with the top end of the L-shaped suction pipe;

[0024] The bottom of the U-shaped frame is fixedly connected with an inclined U-shaped collecting frame.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a crop seed quality detection and grading system based on machine vision, which has the following beneficial effects:

[0027] 1. The present invention can screen and grade seeds that need quality inspection through the screening and grading components in the feeding mechanism, and can transmit the seeds to be inspected to the conveyor belt in a quantitative and fixed row through the transmission components in the feeding mechanism, thereby improving the efficiency of seed inspection. A plurality of strip-shaped openings are arranged inside the channel frame, which is convenient for separating and transporting the seeds that need to be inspected, thereby improving the effect of subsequent visual inspection and the subsequent removal of single unqualified seeds, and solves the problem that when a row of seeds is transported by the conveyor belt, due to the vibration of the conveyor belt, two or more seeds are gathered together, affecting the subsequent individual inspection and removal of seeds.

[0028] 2. The present invention injects gas into the interior of the strip tube rack through a hair dryer, and blows air onto the screening and grading plate through a plurality of nozzles on the strip tube rack, which not only increases the resistance of seeds to rolling downward on the screening and grading plate and provides sufficient time for seed grading and screening, but also separates light seeds, small-grain seeds and broken leaves through the screening and grading plate and guides them out through the guide pipe, thereby having good screening and grading work and further improving the subsequent crop seed quality detection effect.

[0029] 3. The present invention uses a columnar block to block the grid frame to prevent the continuous suction of the suction pump and the disturbance of qualified seeds. The downward movement of the negative pressure cylinder can not only shorten the distance between the L-shaped suction tube and the conveyor belt, thereby improving the suction and removal of unqualified seeds, but also enable the columnar block to move upward, thereby making it lose the shielding of the grid frame by the columnar block, thereby facilitating the suction of air at the grid frame, that is, the unqualified products on the conveyor belt can be sucked through the L-shaped suction tube. It has a good self-opening function, and with the downward resetting of the columnar block, the sucked seeds can be discharged through the guide port below, thereby improving the smoothness of seed removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 For the present invention Figure 1 A top view of the structure of the middle rack frame;

[0032] Figure 3 For the present invention Figure 1 Structural diagram of the feeding mechanism;

[0033] Figure 4 For the present invention Figure 3 The rear view of the structure of the middle feeding mechanism;

[0034] Figure 5 For the present invention Figure 3 A cross-sectional schematic diagram of the feeding mechanism;

[0035] Figure 6 For the present invention Figure 5 Schematic diagram of the combination of the middle rotating brush and the socket profiling cylinder;

[0036] Figure 7 For the present invention Figure 6 A rear view of the combination of the central rotating brush and the socket profiling cylinder;

[0037] Figure 8 For the present invention Figure 5 A front view of the combined cross section of the central rotating brush and the socket profiling cylinder;

[0038] Fig. 9 For the present invention Figure 5 A schematic diagram of the structure of the screening and grading component;

[0039] Fig.10 For the present invention Figure 1 Schematic diagram of the structure of the rejection component;

[0040] Fig.11 For the present invention Fig.10 The structural side view of the rejection component;

[0041] Fig.12 For the present invention Fig.10 Combined cross-sectional view of the medium negative pressure cylinder and the L-shaped suction tube.

[0042] In the figure: 1. Rack frame; 2. Conveyor belt; 3. Channel rack; 4. Visual inspection instrument;

[0043] 5. Removal assembly; 51. U-shaped frame; 52. Negative pressure cylinder; 53. L-shaped suction pipe; 54. Suction pump; 55. Special-shaped pipe; 56. Grid frame; 57. U-shaped collection frame; 58. Mounting frame; 59. Electric cylinder; 510. Column block; 511. Connecting rod;

[0044] 6. Screening and grading components; 61. Grading box; 62. Screening and grading plate; 63. Storage hopper; 64. Strip pipe rack; 65. Blower; 66. Material guide pipe;

[0045] 7. Transmission assembly; 71. Shell; 72. Material guide frame; 73. Baffle; 74. Hollow shaft; 75. Rotating brush;

[0046] 76, socket profiling cylinder; 761, socket groove; 762, inflation groove; 763, inflation pipeline; 764, sealing cover; 765, inflation pump;

[0047] 77. Driving member; 771. Gear ring block; 772. Transmission motor; 773. Rotating gear; 774. Auxiliary shaft; 775. Belt set; 776. Transmission gear. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0049] Embodiment 1:

[0050] See attached Figure 1-12 , a crop seed quality inspection and grading system based on machine vision, comprising a frame frame 1 and a conveying mechanism arranged inside the frame frame 1, the conveying mechanism comprising a conveying roller arranged inside the frame frame 1, a conveying belt 2 and a driving motor for rotating the conveying belt 2, a visual inspection instrument 4 for inspecting crop seeds on the conveying belt 2 is fixedly installed on the top of the frame frame 1, and a partition is arranged on the frame frame 1;

[0051] The seeds to be inspected can be transported by the rotation drive of the conveyor belt 2, and the visual inspection instrument 4 adopts the machine vision inspection equipment used for inspecting seeds in the prior art;

[0052] A rejecting assembly 5 for rejecting unqualified crop seeds is arranged on one side of the top of the frame frame 1, and a feeding mechanism is arranged on the other side of the top of the frame frame 1;

[0053] The feeding mechanism is used to convey the crop seeds to be tested to the top of the conveyor belt 2, and the rejecting component 5 is used to reject the unqualified seeds on the conveyor belt 2;

[0054] The feeding mechanism includes a screening and grading component 6 for preliminary processing of the crop seeds and a transmission component 7 for quantitatively transmitting the screened and graded crop seeds to the conveyor belt 2;

[0055] By setting the screening and grading component 6, the seeds that need quality inspection can be screened and graded, and by setting the transmission component 7, the seeds to be inspected can be transmitted to the conveyor belt 2 in a quantitative and fixed manner.

[0056] See attached Figure 2 , the partition comprises a channel frame 3 fixed to the top of the rack frame 1 by a bracket, and a plurality of strip-shaped openings are arranged inside the channel frame 3;

[0057] The distance between the bottom of the channel frame 3 and the top of the conveyor belt 2 is greater than or equal to zero. A plurality of strip openings are arranged inside the channel frame 3, so as to facilitate the separated transportation of seeds that need to be inspected, thereby improving the effect of subsequent visual inspection and improving the subsequent removal of single unqualified seeds. This solves the problem that when a row of seeds is transported through the conveyor belt 2, due to the vibration of the conveyor belt 2, two or more seeds are gathered together, affecting the subsequent individual inspection and removal of seeds.

[0058] See attached Figures 3 to 8 The transmission assembly 7 includes a shell 71 fixed to the top of the frame 1 by a bracket, the top and bottom of the shell 71 are conical and cylindrical respectively, the bottom of the shell 71 is fixedly connected with a material guide frame 72, and a strip partition plate is arranged inside the material guide frame 72, and an inclined baffle plate 73 is fixedly connected to the top of the inner wall of the shell 71, a rotatable socket profiling cylinder 76 and a cylindrical rotating brush 75 are arranged inside the shell 71, and a driving member 77 for rotating the socket profiling cylinder 76 and the rotating brush 75 is arranged on the back of the shell 71;

[0059] The guide frame 72 is used to transfer the seeds in the sockets of the socket-shaped cylinder 76 to the conveyor belt 2, and the strip-shaped partition plate is used to separately guide the exported seeds to prevent the phenomenon of multiple seeds being gathered and affecting the subsequent detection work;

[0060] The outer surface of the rotating brush 75 contacts the outer surface of the socket profiling cylinder 76. The rotating brush 75 can remove the excess seeds inside the socket of the socket profiling cylinder 76, thereby facilitating the transmission of a single seed.

[0061] The drive member 77 is provided to rotationally drive the socket profiling cylinder 76 , and the drive member 77 includes a motor for rotationally driving the socket profiling cylinder 76 .

[0062] See attached Figures 3 to 8 The hollow shaft 74 is rotatably connected to the axis of the socket profiling cylinder 76, and the hollow shaft 74 is fixedly connected to the interior of the housing 71;

[0063] The hollow shaft 74 is provided to support the socket profiling cylinder 76 for rotation inside the housing 71;

[0064] The outer surface of the socket profiling cylinder 76 is provided with a plurality of socket grooves 761 for taking out the crop seeds, and one side of the inner wall of the socket groove 761 is provided as an inclined surface;

[0065] The number of each group of socket grooves 761 is consistent with the number of strip-shaped openings inside the channel frame 3. One side of the inner wall of the socket groove 761 is set as an inclined surface, so that when the socket profiling cylinder 76 rotates, it can initially guide out the redundant superimposed seeds through the inclined surface;

[0066] It should be noted here that the depth of the socket groove 761 is greater than the size of one seed and less than the size of two seeds.

[0067] Refer to the attached Figures 3 to 8 The inner surface of the socket profiling cylinder 76 is provided with a plurality of gas-filled grooves 762, and the interior of the plurality of gas-filled grooves 762 is connected with the interior of the socket groove 761 through a gas-filled pipe 763;

[0068] By injecting gas into the socket groove 761 through the gas filling groove 762, two or more seeds stacked inside the socket groove 761 can be blown out, so that the redundant seeds can be removed, so as to facilitate the subsequent orderly detection of seed quality.

[0069] The air-filling pipe 763 is inclined, and the port of the air-filling pipe 763 is located in the middle of the socket groove 761. The outer surface of the hollow shaft 74 is fixedly connected to two sealing covers 764 through two air guide tubes, and the two sealing covers 764 are in sealing contact with the inner surface of the socket profiling cylinder 76.

[0070] The inflation pipe 763 is inclined, so that when the air is inflated into the socket groove 761, the air is inflated from bottom to top, thereby making it easier to blow out the seeds stacked inside the socket groove 761;

[0071] Two sealing covers 764 are fixedly connected to the outer surface of the hollow shaft 74, so that when the socket profiling cylinder 76 rotates, each group of socket grooves 761 moves to the upper sealing cover 764 position, and the sealing cover 764 can automatically communicate with the inside of the inflation groove 762 in a sealed manner, so as to form an automatic inflation operation, without the need to set a separate valve part for control, thereby improving the convenience of operation;

[0072] An air pump 765 for injecting air into the hollow shaft 74 is mounted on the housing 71;

[0073] The air pump 765 is connected to an external power source and a control switch, and is used to inject high-pressure gas into the hollow shaft 74, and then lead it out through the two sealing covers 764, so as to clean the inside of the socket groove 761 and remove excess seeds;

[0074] See attached Figure 5 and Figure 8One of the sealing covers 764 is arranged vertically, so that the gas inside the sealing cover 764 can be injected into the vertically upward inflation groove 762. The gas at this position can inflate the high-position socket groove 761. By inflating the socket groove 761, the seeds inside the socket groove 761 just after the material is taken can be blown, and then the excess seeds inside the socket groove 761 can be blown out. With the arc surface of the socket profiling tube 76, the seeds blown out can return to their original flavor.

[0075] Another sealing cover 764 is arranged in an inclined shape to facilitate cleaning of the inside of the socket groove 761 of the discharge port, thereby improving the effect of subsequent material removal.

[0076] Refer to the attached Figure 7 The driving member 77 includes a toothed ring block 771 fixed to the inner surface of the socket profiling cylinder 76 and a transmission motor 772 fixed to the back of the housing 71. The output shaft of the transmission motor 772 extends to the inside of the housing 71, and the output shaft of the transmission motor 772 is fixedly connected to a rotating gear 773 meshing with the inner surface of the toothed ring block 771.

[0077] The transmission motor 772 is connected to an external power source and a control switch, and is used to drive the rotating gear 773 to rotate. The rotation of the rotating gear 773 can drive the toothed ring block 771 to rotate through meshing, and finally drive the socket profiling cylinder 76 to rotate, thereby forming a quantitative seed transmission operation.

[0078] One end of the rotating brush 75 extends to the outside of the shell 71, and the back of the shell 71 is rotatably connected to an auxiliary shaft 774, and the auxiliary shaft 774 is transmission-connected to the rotating brush 75 through a belt set 775, and the auxiliary shaft 774 is transmission-connected to the output shaft of the transmission motor 772 through two meshing transmission gears 776.

[0079] The auxiliary shaft 774 is connected to the output shaft of the transmission motor 772 through two meshing transmission gears 776, so that when the transmission motor 772 rotates, the auxiliary shaft 774 can be driven to rotate in the opposite direction through the two meshing transmission gears 776. The two transmission gears 776 include two gears with equal or unequal diameters, which are used to adjust the speed of the auxiliary shaft 774 and increase the rotation speed of the rotating brush 75.

[0080] The auxiliary shaft 774 is connected to the rotating brush 75 through the belt group 775, so that when the auxiliary shaft 774 rotates, the rotating brush 75 can be driven to rotate synchronously and in the same direction. It has a good linkage function, which not only improves the energy saving and environmental protection of the equipment, but also increases the orderliness of seed transmission.

[0081] Embodiment 2: Based on embodiment 1, the difference is that;

[0082] See attached Figure 5 and Fig. 9 The screening and grading assembly 6 includes a grading box 61 fixed to the top of the housing 71, a discharge port is provided between the grading box 61 and the interior of the housing 71, an inclined screening and grading plate 62 is fixedly connected to the interior of the grading box 61, a storage hopper 63 is fixedly connected to one side of the grading box 61, and a quantitative plate is provided at the feeding end of the storage hopper 63;

[0083] The storage hopper 63 is used to store the crop seeds that need to be inspected for quality. By injecting seeds into the grading box 61, the seeds can be rolled on the screening and grading plate 62 to form an automatic screening and grading operation. The quantitative plate is used to control the amount of discharged seeds, thereby improving the orderliness of subsequent seed grading and seed transmission.

[0084] A strip tube rack 64 is fixedly connected to the top of the inner wall of the grading box 61, and a plurality of nozzles are opened at the bottom of the strip tube rack 64. A blower 65 for injecting air into the strip tube rack 64 is fixedly connected to the top of the grading box 61. The air outlet of the blower 65 is connected to the inside of the strip tube rack 64 through an air outlet pipe. A material guide pipe 66 is fixedly connected to the bottom of the grading box 61.

[0085] The blower 65 is connected to an external power supply and a control switch, and is used to inject gas into the interior of the strip tube rack 64, and blow air onto the screening and grading plate 62 through the strip tube rack 64. This can not only increase the resistance of the seeds to rolling downward on the screening and grading plate 62, providing sufficient time for seed grading and screening, but also separate the light seeds, small-grain seeds and broken leaves through the screening and grading plate 62, and guide them out through the guide tube 66, thereby having good screening and grading work, and further improving the subsequent crop seed quality detection effect.

[0086] Embodiment 3: Based on embodiment 1, the difference is that;

[0087] See attached Figures 10 to 12 , the rejecting assembly 5 includes a U-shaped frame 51 fixed to the top of the rack frame 1, and a plurality of rejecting members are arranged on the U-shaped frame 51;

[0088] By arranging a plurality of rejecting pieces on the U-shaped frame 51, each rejecting piece is used to individually reject unqualified seeds in each strip-shaped opening, thereby improving the convenience of operation. The number of the rejecting pieces is consistent with the number of the strip-shaped openings.

[0089] The rejecting member includes a negative pressure cylinder 52 disposed on a U-shaped frame 51, and a material guide port is provided at the bottom of the negative pressure cylinder 52, and an L-shaped suction pipe 53 is fixedly connected to the outer surface of the negative pressure cylinder 52;

[0090] The negative pressure inside the negative pressure cylinder 52 can be used to remove unqualified seeds on the conveyor belt 2 by suction through the L-shaped suction pipe 53;

[0091] A suction pump 54 is fixedly connected to the U-shaped frame 51, and the suction end of the suction pump 54 is connected to the inside of the negative pressure cylinders 52 of the plurality of rejecting parts through a special-shaped pipe 55, and a grid frame 56 is provided at the connection between the special-shaped pipe 55 and the inside of the plurality of negative pressure cylinders 52, and the grid frame 56 is flush with the top end of the L-shaped suction pipe 53;

[0092] The suction pump 54 is connected to an external power supply and a control switch, and is used to evacuate the interior of the negative pressure cylinder 52 through the special-shaped pipe 55, and finally to suck and remove unqualified seeds on the conveyor belt 2 through the L-shaped suction pipe 53. The grid frame 56 is set to block the suction port to prevent unqualified seeds from clogging the special-shaped pipe 55;

[0093] The bottom of the U-shaped frame 51 is fixedly connected with an inclined U-shaped collecting frame 57;

[0094] The inclined U-shaped collecting frame 57 is used to uniformly export the unqualified seeds removed by suction, so as to facilitate the uniform processing by subsequent staff;

[0095] The rejecting member also includes a mounting frame 58 fixed to one side of the U-shaped frame 51, and an electric cylinder 59 for driving the negative pressure cylinder 52 up and down is fixedly connected to the bottom of the mounting frame 58;

[0096] The electric cylinder 59 is connected to an external power source and a control switch, and is used to drive the negative pressure cylinder 52 to move up and down. Through the downward movement of the negative pressure cylinder 52, the distance between the L-shaped suction pipe 53 and the conveyor belt 2 can be shortened, thereby improving the suction and removal of unqualified seeds.

[0097] A columnar block 510 for shielding the grid frame 56 is disposed inside the negative pressure cylinder 52, and the columnar block 510 is fixedly connected to the bottom of the mounting frame 58 via a connecting rod 511;

[0098] The columnar block 510 is provided to block the grid frame 56 to prevent the continuous suction of the suction pump 54 and disturbance of the qualified seeds. The downward movement of the negative pressure cylinder 52 can not only shorten the distance between the L-shaped suction pipe 53 and the conveyor belt 2, thereby improving the suction and removal of unqualified seeds, but also enable the columnar block 510 to move upward, thereby making the columnar block 510 lose the shielding of the grid frame 56, thereby facilitating the air extraction at the grid frame 56, that is, the unqualified products on the conveyor belt 2 can be sucked through the L-shaped suction pipe 53, and it has a good self-opening function. In addition, with the downward resetting of the columnar block 510, the sucked seeds can be discharged through the guide port below, thereby improving the smoothness of seed removal.

[0099] It should be noted here that the suction pump 54 adopts a high-intensity suction pump to prevent the opening of the material guide port, which makes it impossible to perform normal seed suction work, and the aperture of the material guide port is smaller than the aperture of the L-shaped suction tube 53, or a one-way valve is set inside the material guide port for one-way sealing of the material guide port.

[0100] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0101] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine vision-based crop seed quality detection and grading system, comprising a frame (1) and a conveying mechanism arranged inside the frame (1), wherein the conveying mechanism comprises a conveying roller arranged inside the frame (1), a conveying belt (2) and a driving motor for rotating the conveying belt (2), characterized in that: A visual inspection instrument (4) for inspecting the crop seeds on the conveyor belt (2) is fixedly mounted on the top of the frame (1), and a partition is provided on the frame (1); A rejection component (5) for rejecting unqualified crop seeds is arranged on one side of the top of the frame frame (1), and a feeding mechanism is arranged on the other side of the top of the frame frame (1); The feeding mechanism comprises a screening and grading component (6) for performing preliminary processing on crop seeds and a transmission component (7) for quantitatively transmitting the screened and graded crop seeds to a conveyor belt (2).

2. The machine vision-based crop seed quality detection and grading system according to claim 1, characterized in that: The partition comprises a channel frame (3) fixed to the top of the rack frame (1) through a bracket, and a plurality of strip-shaped openings are arranged inside the channel frame (3).

3. A machine vision-based crop seed quality detection and grading system according to any one of claims 1-2, characterized in that: The transmission assembly (7) comprises a shell (71) fixed to the top of the frame frame (1) by a bracket, the top and bottom of the shell (71) are respectively conical and cylindrical, the bottom of the shell (71) is fixedly connected to a material guide frame (72), and a strip-shaped partition plate is arranged inside the material guide frame (72), the top of the inner wall of the shell (71) is fixedly connected to an inclined baffle (73), a rotatable socket profiling cylinder (76) and a cylindrical rotating brush (75) are arranged inside the shell (71), and a driving member (77) for rotating the socket profiling cylinder (76) and the rotating brush (75) is arranged on the back of the shell (71).

4. The crop seed quality detection and grading system based on machine vision according to claim 3, characterized in that: The center of the socket profiling cylinder (76) is rotatably connected to a hollow shaft (74), and the hollow shaft (74) is fixedly connected to the interior of the housing (71); The outer surface of the socket-shaped cylinder (76) is provided with a plurality of groups of socket grooves (761) for taking out crop seeds, and one side of the inner wall of the socket groove (761) is arranged as an inclined surface.

5. The machine vision-based crop seed quality detection and grading system according to claim 3, characterized in that: The inner surface of the socket profiling cylinder (76) is provided with a plurality of gas-filled grooves (762), and the interior of the plurality of gas-filled grooves (762) is connected to the interior of the socket groove (761) through a gas-filled pipe (763); The inflation pipe (763) is inclined, and the port of the inflation pipe (763) is located in the middle of the socket groove (761); the outer surface of the hollow shaft (74) is fixedly connected to two sealing covers (764) through two air guide tubes, and the two sealing covers (764) are both in sealing contact with the inner surface of the socket profiling cylinder (76); The housing (71) is provided with an air pump (765) for injecting air into the hollow shaft (74).

6. The machine vision-based crop seed quality detection and grading system according to claim 4, characterized in that: The driving member (77) comprises a toothed ring block (771) fixed to the inner surface of the socket profiling cylinder (76) and a transmission motor (772) fixed to the back of the housing (71), the output shaft of the transmission motor (772) extending into the interior of the housing (71), and the output shaft of the transmission motor (772) is fixedly connected to a rotating gear (773) meshing with the inner surface of the toothed ring block (771); One end of the rotating brush (75) extends to the outside of the shell (71), and the back of the shell (71) is rotatably connected to an auxiliary shaft (774), and the auxiliary shaft (774) is transmission-connected to the rotating brush (75) via a belt set (775), and the auxiliary shaft (774) is transmission-connected to the output shaft of the transmission motor (772) via two meshing transmission gears (776).

7. The machine vision-based crop seed quality detection and grading system according to claim 3, characterized in that: The screening and grading assembly (6) comprises a grading box (61) fixed to the top of the shell (71), a discharge port is provided between the grading box (61) and the inside of the shell (71), an inclined screening and grading plate (62) is fixedly connected to the inside of the grading box (61), and a storage hopper (63) is fixedly connected to one side of the grading box (61); A strip tube rack (64) is fixedly connected to the top of the inner wall of the grading box (61), and a plurality of nozzles are provided at the bottom of the strip tube rack (64). A blower (65) for injecting air into the strip tube rack (64) is fixedly connected to the top of the grading box (61), and an air outlet of the blower (65) is connected to the inside of the strip tube rack (64) through an air outlet pipe. A material guide pipe (66) is fixedly connected to the bottom of the grading box (61).

8. A machine vision-based crop seed quality detection and grading system according to any one of claims 1-2, characterized in that: The rejecting assembly (5) comprises a U-shaped frame (51) fixed to the top of the frame frame (1), and a plurality of rejecting parts are arranged on the U-shaped frame (51); The rejecting member comprises a negative pressure cylinder (52) arranged on the U-shaped frame (51), and a material guide port is provided at the bottom of the negative pressure cylinder (52), and an L-shaped suction pipe (53) is fixedly connected to the outer surface of the negative pressure cylinder (52); A suction pump (54) is fixedly connected to the U-shaped frame (51), and the suction end of the suction pump (54) is connected to the inside of the negative pressure cylinders (52) of the plurality of rejecting parts through a special-shaped pipe (55), and a grid frame (56) is provided at the connection between the special-shaped pipe (55) and the inside of the plurality of negative pressure cylinders (52), and the grid frame (56) is flush with the top end of the L-shaped suction pipe (53); An inclined U-shaped collecting frame (57) is fixedly connected to the bottom of the U-shaped frame (51).

Images