Near infrared spectrum sorting device and method for corn kernels

Abstract

The invention relates to a near infrared spectrum sorting device and method for corn kernels. According to the technical scheme, a corn kernel picking and sampling module is used for separating and transferring single corn seeds from a kernel group; the corn kernel rotary conveying module is used for bearing and conveying a single corn seed to the near infrared spectrum identification module for identification; the near-infrared spectrum identification module is arranged on a conveying path of the corn kernel rotary conveying module and is used for carrying out near-infrared spectrum acquisition and identification on the single seed conveyed to a detection station of the near-infrared spectrum identification module; and the corn kernel blowing and sorting module is arranged on a conveying path of the corn kernel rotary conveying module, is positioned at the next station of the near infrared spectrum identification module, and is used for sorting the single seeds into different sorting hoppers according to an identification result. The device has the beneficial effects that the structure is compact, the rhythm is stable, the design of the trilobal turntable is ingenious, single-particle sample injection, accurate positioning and conveying, spectrum identification and physical separation can be seamlessly integrated, and the separation efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of maize haploid breeding, and particularly relates to a maize kernel near-infrared spectrum sorting device and method. BACKGROUND

[0002] In each link of maize seed breeding, seed production, processing, quality inspection, sales and use, maize seeds need to be identified. For example, in maize haploid breeding technology, haploid seeds need to be identified; in maize seed quality inspection, seed purity needs to be identified. With the progress of science and technology, China's agriculture is rapidly developing towards automation, engineering and modernization, and the seed identification method is gradually developing from manual identification to machine identification, from group seed identification to single seed identification. Compared with manual identification, machine identification is objective, fast, accurate and other characteristics, and is an important guarantee for the continuous improvement of seed quality and quality, the sustainable and high yield of agricultural production.

[0003] In addition, the quality of maize seeds mainly includes three aspects: appearance quality (color, size, etc.), sowing quality (germination rate, purity, etc.) and genetic quality (variety, edibility, etc.). Before planting, some qualities (such as color, size, etc.) can be identified by visual inspection, while other qualities (such as variety, germination rate) need to be identified by indoor inspection with instruments and equipment. Among many indoor inspection technologies, near-infrared spectroscopy technology has attracted more and more attention and attention due to its non-destructive, fast, environmentally friendly, simple operation and other characteristics, but there are still some problems in the application of seed identification technology based on near-infrared spectroscopy.

[0004] The main problems existing at present are: first, single grain and accurate positioning are the bottleneck of automation, near-infrared spectrum, especially transmission spectrum, is extremely sensitive to the position of the grain in the light path, manual placement of single seed is low in efficiency, and the position and posture placed each time cannot be guaranteed to be consistent, which leads to poor repeatability of the collected spectrum data, seriously affecting the accuracy and stability of the identification model; second, the identification and sorting links are disconnected, the existing technology focuses on identification itself, and lacks an efficient and non-destructive automatic device that can be immediately linked with the identification result and execute physical sorting, so that the whole detection process cannot form a closed loop, which restricts the high-throughput application. SUMMARY

[0005] The purpose of the present application is to solve the above-mentioned defects of the prior art, and to provide a maize kernel near-infrared spectrum sorting device and method, which can realize single seed sampling, accurate positioning, rapid identification and immediate sorting of the whole process sorting device.

[0006] The application discloses a corn kernel near-infrared spectrum sorting device, which relates to the technical field of corn kernel sorting devices. The corn kernel picking and sampling module (a) comprises a first sliding block (3), a suction nozzle (5), a conical hopper (6), a jacking rod (7), an electric push rod (8), an X-axis lead screw (10) and a Y-axis lead screw (11), the conical hopper (6) is arranged on the upper portion of the electric push rod (8), the conical hopper (6) is filled with corn kernels, the jacking rod (7) is arranged in the middle portion of the conical hopper (6), and the lower end of the jacking rod (7) is connected with the electric push rod (8); the Y-axis lead screw (11) is fixedly arranged on one side of the conical hopper (6), the X-axis lead screw (10) is movably connected to the Y-axis lead screw (11) through the first sliding block (3), and the suction nozzle (5) is arranged on the X-axis lead screw (10). The corn kernel rotating conveying module (b) comprises a first tray (12), a first circular hole (13), a rotating rod (14), a second tray (15), a driving motor (16), a third tray (19) and a three-leaf rotating disc (26), the upper end of the driving motor (16) is connected with the three-leaf rotating disc (26), three rotating rods (14) are arranged on the outer wall of the three-leaf rotating disc (26), and the outer ends of the rotating rods (14) are connected with the first tray (12), the second tray (15) and the third tray (19). The near-infrared spectrum identification module (c) comprises a near-infrared light source (22), a micro near-infrared spectrometer (23), a second base (24) and a support frame (25), the lower end of the support frame (25) is fixed to the second base (24), the near-infrared light source (22) and the micro near-infrared spectrometer (23) are arranged on the upper side of the support frame (25), and the near-infrared spectrum identification module (c) is used for identifying the corn kernels conveyed by the rotating tray. The corn kernel blowing and sorting module (d) comprises a first blowing pipe (17), a second blowing pipe (18), a first distribution hopper (20) and a second distribution hopper (21), the outer end of the first blowing pipe (17) corresponds to the first distribution hopper (20), the outer end of the second blowing pipe (18) corresponds to the second distribution hopper (21), the corn kernels after the infrared spectrum identification are conveyed to the outer ends of the first blowing pipe (17) and the second blowing pipe (18) through the rotating tray, and the corn kernels are blown into the corresponding distribution hoppers according to the identification results.

[0007] Preferably, the lower end of the Y-axis screw rod (11) is fixedly installed on the base (9), and the X-axis screw rod (10) is driven by the first sliding block (3) to move up and down, and the second sliding block (4) is installed on the X-axis screw rod (10) and moves laterally along the X-axis screw rod (10).

[0008] Preferably, the suction nozzle (5) is connected to the second sliding block (4) through the mounting seat, and the suction nozzle (5) is connected to the vacuum pump placed on the base (9) through the pipeline, the pressure sensor and the electromagnetic valve.

[0009] Preferably, the upper end of the Y-axis screw rod (11) is connected to the first stepping motor (1), and the right end of the X-axis screw rod (10) is connected to the second stepping motor (2).

[0010] Preferably, the outer wall of the three-blade rotary disc (26) is sequentially and spacedly provided with three rotary rods (14) at intervals of 120 degrees, the three-blade rotary disc (26) is driven to rotate by the driving motor (16), and the three rotary rods (14) are driven to rotate, so that the tray connected to the outer end is moved to positions, and corn kernels are picked up, near-infrared spectrum identification and air blowing sorting are respectively performed at 0°, 120° and 240° positions.

[0011] Preferably, when the first tray (12) is located at one side of the conical hopper (6), the second tray (15) is located between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the third tray (19) is located at the side of the first material hopper (20) and the second material hopper (21); when the first tray (12) is rotated to between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), the second tray (15) is located at the side of the first material hopper (20) and the second material hopper (21), and the third tray (19) returns to one side of the conical hopper (6); when the first tray (12) is rotated to the side of the first material hopper (20) and the second material hopper (21), the second tray (15) comes to one side of the conical hopper (6), and the third tray (19) comes between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the above processes are sequentially and circularly performed.

[0012] Preferably, the first air blowing pipe (17) and the second air blowing pipe (18) are respectively connected to the gas source through the pipeline and the electromagnetic valve, and the gas nozzles are respectively installed on the first air blowing pipe (17) and the second air blowing pipe (18).

[0013] Preferably, splash-proof baffles are respectively installed at the entrances of the first material hopper (20) and the second material hopper (21).

[0014] The use method of the corn kernel near-infrared spectrum sorting device is provided, and the technical scheme comprises the following processes: (1)First, the corn kernels are placed into the conical hopper (6), and then the electric push rod (8) is controlled to lift, and a corn kernel is lifted by the ejector rod (7), the top end of the ejector rod (7) has a groove, and the groove can accommodate a corn kernel; (2) The X-axis lead screw (10) and the Y-axis lead screw (11) fixed on the base (9) are respectively driven by the second stepping motor (2) and the first stepping motor (1), and the suction nozzle (5) installed at the lower end of the sliding block (4) is moved to the top of the ejector rod (7) through the linkage of the X-axis and Y-axis lead screws, and the corn kernel is sucked up, if it is detected that the suction pipe is blocked by the corn kernel, it means that the corn is sucked up, otherwise the corn kernel lifting action and the suction action are repeated until the corn kernel is sucked up; (3) The X-axis lead screw (10) and the Y-axis lead screw (11) jointly move the suction nozzle (5) to the top of the circular hole (13) of the first tray (12), open the air path electromagnetic valve, and the suction nozzle (5) releases the corn kernel at the position of the circular hole (13) of the first tray (12), at this time, the second tray (15) is located between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the third tray (19) is located at the side of the first distribution hopper (20) and the second distribution hopper (21); (4) Rotate 120 degrees through the driving motor (16), and the three-leaf rotary disc (26) drives the three trays at the outer end of the rotating rod (14) to move positions, and the first tray (12) is sent to the position between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the near-infrared light source (22) and the miniature near-infrared spectrometer (23) are installed and fixed through the support frame (25) and the second base (24), and the corn kernel is classified into two categories A and B through diffuse transmission or diffuse reflection; (5) After the classification and identification are completed, the driving motor (16) is rotated by 120 degrees again, and the first tray (12) is rotated and conveyed to the side of the first distribution hopper (20) and the second distribution hopper (21), if the corn kernel is identified as B, the first distribution hopper (21) is blown in through the control of the first air blowing pipe (18), if the corn kernel is identified as A, the corn kernel is blown into the second distribution hopper (20) through the control of the second air blowing pipe (17), and the sorting of the corn kernels is realized.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The corn kernel picking and sampling module is used for separating and transferring single corn seeds from a kernel group; the corn kernel rotating and conveying module is used for carrying and conveying the single corn seeds to the near-infrared spectrum identification module for identification; the near-infrared spectrum identification module is arranged on the conveying path of the corn kernel rotating and conveying module and is used for collecting and identifying the near-infrared spectrum of the single seeds conveyed to the detection station thereof; and the corn kernel air blowing and sorting module is arranged on the conveying path of the corn kernel rotating and conveying module and is located at the next station of the near-infrared spectrum identification module and is used for sorting the single seeds into different material hoppers according to the identification result. The present application can realize a full-process closed-loop sorting: seamlessly integrating single-grain sampling, accurate positioning and conveying, spectrum identification and physical sorting, realizing a complete process of "identification and sorting", greatly improving the efficiency; in addition, the accuracy of the detection data is ensured: through the precise sampling of the "needle-suction nozzle" cooperation and the accurate positioning of the three-leaf-shaped turntable, the consistency of the position of the corn seeds during each spectrum collection is ensured, providing a stable and reliable data source for the identification model; moreover, the sorting is efficient and lossless: the pneumatic sorting method is non-contact, the action speed is fast, and through the splash baffle design, the sorting accuracy is ensured, and mechanical damage to the seeds is completely avoided; in summary, the present application has compact structure, stable beat, clever three-leaf-shaped turntable design, three stations simultaneously performing different operations (loading, detection, sorting), high space utilization rate, stable work beat, and is particularly suitable for laboratory and small-scale high-throughput sorting scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic diagram of the present application; Figure 2 is another perspective structural schematic diagram of the present application; Figure 3 is a structural schematic diagram of the corn kernel picking and sampling module; Figure 4 is a structural schematic diagram of the corn kernel rotating and conveying module; Figure 5 is a structural schematic diagram of the near-infrared spectrum identification module; Figure 6 is a structural schematic diagram of the corn kernel air blowing and sorting module; In the above figure: corn kernel picking sampling module a, corn kernel rotating conveying module b, near-infrared spectrum identification module c, corn kernel air blowing sorting module d, first stepper motor 1, second stepper motor 2, first sliding block 3, second sliding block 4, suction nozzle 5, conical hopper 6, ejector rod 7, electric push rod 8, base 9, X-axis lead screw 10, Y-axis lead screw 11, first tray 12, first circular hole 13, rotating rod 14, second tray 15, driving motor 16, first air blowing pipe 17, second air blowing pipe 18, third tray 19, first distribution hopper 20, second distribution hopper 21, near-infrared light source 22, miniature near-infrared spectrometer 23, second base 24, support frame 25, three-blade rotating disc 26. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0018] Embodiment 1, refer to Figures 1-6 The corn kernel near-infrared spectrum sorting device mentioned in the present application comprises a corn kernel picking sampling module a, a corn kernel rotating conveying module b, a near-infrared spectrum identification module c, and a corn kernel air blowing sorting module d, the corn kernel picking sampling module a, the near-infrared spectrum identification module c, and the corn kernel air blowing sorting module d are installed around the corn kernel rotating conveying module b, The corn kernel picking sampling module a comprises a first sliding block 3, a suction nozzle 5, a conical hopper 6, an ejector rod 7, an electric push rod 8, an X-axis lead screw 10, and a Y-axis lead screw 11, the conical hopper 6 is installed on the upper part of the electric push rod 8, and the conical hopper 6 is filled with corn kernels, the ejector rod 7 is installed in the middle part of the conical hopper 6, and the lower end of the ejector rod 7 is connected to the electric push rod 8; the Y-axis lead screw 11 is fixedly installed on one side of the conical hopper 6, the X-axis lead screw 10 is movably connected to the Y-axis lead screw 11 through the first sliding block 3, the suction nozzle 5 is installed on the X-axis lead screw 10, and the conical hopper 6 is below the suction nozzle 5; The corn kernel rotating conveying module b comprises a first tray 12, a first circular hole 13, a rotating rod 14, a second tray 15, a driving motor 16, a third tray 19, and a three-blade rotating disc 26, the three-blade rotating disc 26 is connected to the driving motor 16 at the upper end, three rotating rods 14 are installed on the outer wall of the three-blade rotating disc 26, and the outer ends of the rotating rods 14 are installed with the first tray 12, the second tray 15, and the third tray 19, The near-infrared spectrum identification module c comprises a near-infrared light source 22, a miniature near-infrared spectrometer 23, a second base 24, and a support frame 25, the lower end of the support frame 25 is fixed to the second base 24, the second base 24 is installed on one side of the base 9, the near-infrared light source 22 and the miniature near-infrared spectrometer 23 are installed on the upper side of the support frame 25, and the support frame 25 is used for infrared spectrum identification of the corn kernels conveyed by the rotating tray; The corn kernel air blowing sorting module d includes a first air blowing pipe 17, a second air blowing pipe 18, a first distribution hopper 20 and a second distribution hopper 21. The outer end of the first air blowing pipe 17 corresponds to the first distribution hopper 20, and the outer end of the second air blowing pipe 18 corresponds to the second distribution hopper 21. The corn kernels after infrared spectrum identification are transferred to the outer ends of the first air blowing pipe 17 and the second air blowing pipe 18 through the tray rotation. The first air blowing pipe 17 and the second air blowing pipe 18 are respectively fixed on the base 9 through supports and are respectively connected to the air pump through control valves. The corn kernels are blown into the corresponding distribution hoppers according to the identification results.

[0019] The lower end of the Y-axis lead screw 11 is fixedly installed on the base 9. The X-axis lead screw 10 is driven by the first sliding block 3 to move up and down. The second sliding block 4 is installed on the X-axis lead screw 10 and moves laterally along the X-axis lead screw 10.

[0020] The suction nozzle 5 is connected to the second sliding block 4 through the mounting seat. The suction nozzle 5 is connected to the vacuum pump installed on the base 9 through pipelines, a pressure sensor and an electromagnetic valve.

[0021] The upper end of the Y-axis lead screw 11 is connected to the first stepping motor 1, and the right end of the X-axis lead screw 10 is connected to the second stepping motor 2, so as to facilitate position adjustment.

[0022] Three rotating rods 14 are installed on the outer wall of the three-leaf rotary disc 26 at intervals of 120 degrees. The three-leaf rotary disc 26 is driven to rotate by the driving motor 16, thereby driving the three rotating rods 14 to rotate, so as to drive the tray connected to the outer end to move position and perform corn kernel picking, near-infrared spectrum identification and air blowing sorting at 0°, 120° and 240° orientations respectively.

[0023] When the first tray 12 is located at one side of the conical hopper 6, the second tray 15 is located between the near-infrared light source 22 and the miniature near-infrared spectrometer 23, and the third tray 19 is located at the side of the first distribution hopper 20 and the second distribution hopper 21. When the first tray 12 rotates to between the near-infrared light source 22 and the miniature near-infrared spectrometer 23, the second tray 15 is located at the side of the first distribution hopper 20 and the second distribution hopper 21, and the third tray 19 returns to one side of the conical hopper 6. When the first tray 12 rotates to the side of the first distribution hopper 20 and the second distribution hopper 21, the second tray 15 comes to one side of the conical hopper 6, and the third tray 19 comes between the near-infrared light source 22 and the miniature near-infrared spectrometer 23, and the above steps are sequentially cycled.

[0024] The first air blowing pipe 17 and the second air blowing pipe 18 are respectively connected to the gas source through pipelines and electromagnetic valves, and air nozzles are respectively installed on the first air blowing pipe 17 and the second air blowing pipe 18.

[0025] The splash-proof baffle is installed at the inlet of the first and second distribution hoppers 20 and 21 respectively, so as to facilitate the blowing of the corn kernels into the corresponding distribution hoppers.

[0026] The use method of the corn kernel near-infrared spectrum sorting device mentioned in the application comprises the following processes: (1) First, a certain amount of corn kernels are placed in the conical hopper 6, and then the electric push rod 8 is controlled to lift, and a corn kernel is lifted by the jacking rod 7, and the jacking rod 7 has a groove at the top end, which can accommodate a corn kernel; (2) The X-axis lead screw 10 and the Y-axis lead screw 11 fixed on the base 9 are driven by the second stepper motor 2 and the first stepper motor 1 respectively, and the suction nozzle 5 installed at the lower end of the sliding block 4 is moved to the top of the jacking rod 7 through the linkage of the X-axis and Y-axis lead screws, and the corn kernel is sucked, and if it is detected that the suction pipe is blocked by the corn kernel, it means that the corn kernel is sucked, otherwise the corn kernel lifting action and the suction action are repeated until the corn kernel is sucked; (3) The X-axis lead screw 10 and the Y-axis lead screw 11 jointly move the suction nozzle 5 to the position above the circular hole 13 of the first tray 12, open the air path electromagnetic valve, and the suction nozzle 5 releases the corn kernel at the position of the circular hole 13 of the first tray 12, at this time, the second tray 15 is located between the near-infrared light source 22 and the miniature near-infrared spectrometer 23, and the third tray 19 is located at the side of the first distribution hopper 20 and the second distribution hopper 21; (4) The driving motor 16 is rotated by 120 degrees, the three-leaf rotating disc 26 drives the three trays at the outer end of the rotating rod 14 to move positions, and the first tray 12 is sent to the position between the near-infrared light source 22 and the miniature near-infrared spectrometer 23, and the near-infrared light source 22 and the miniature near-infrared spectrometer 23 are installed and fixed through the support frame 25 and the second base 24, and the corn kernel is classified into two categories A and B through diffuse transmission or diffuse reflection; (5) After the classification and identification are completed, the driving motor 16 is rotated by 120 degrees again, and the first tray 12 is rotated and conveyed to the side of the first distribution hopper 20 and the second distribution hopper 21, if the corn kernel is identified as B, the first distribution hopper 21 is blown through the control of the first air blowing pipe 18, if the corn kernel is identified as A, the corn kernel is blown into the second distribution hopper 20 through the control of the second air blowing pipe 17, and the sorting of the corn kernel is realized.

[0027] In example 2, the corn kernel near-infrared spectrum sorting device mentioned in the application comprises a corn kernel picking and sampling module a, a corn kernel rotating conveying module b, a near-infrared spectrum identification module c, and a corn kernel air blowing sorting module d.

[0028] The difference between example 1 and example 2 is that: The corn kernel air-blowing sorting module d mentioned in this embodiment can be supplemented with a third or fourth air-blowing pipe according to the needs of identification and sorting. It can sort corn kernels into three or four sizes. Then, a third or fourth hopper can be added to blow the corn kernels into the corresponding hopper according to the identification results, thus meeting the needs of more refined classification.

[0029] In addition, the air intake nozzle 5 can also be set at the outer end of the X-axis lead screw 10, and moved to the corresponding position by the X-axis lead screw 10.

[0030] The above description is merely a partial preferred embodiment of the present invention. Any person skilled in the art can modify the above-described technical solutions or modify them into equivalent technical solutions. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A near-infrared spectral sorting device for corn kernels, characterized in that: It includes a corn kernel picking and injection module (a), a corn kernel rotating conveying module (b), a near-infrared spectroscopy identification module (c), and a corn kernel air blowing sorting module (d). The corn kernel picking and injection module (a), the near-infrared spectroscopy identification module (c), and the corn kernel air blowing sorting module (d) are installed around the corn kernel rotating conveying module (b). The corn kernel picking and feeding module (a) includes a first slider (3), a suction nozzle (5), a conical hopper (6), a top rod (7), an electric push rod (8), an X-axis screw (10), and a Y-axis screw (11). The conical hopper (6) is installed on the upper part of the electric push rod (8), and the conical hopper (6) is filled with corn kernels. The top rod (7) is installed in the middle of the conical hopper (6), and the lower end of the top rod (7) is connected to the electric push rod (8). The Y-axis screw (11) is fixedly installed on one side of the conical hopper (6). The X-axis screw (10) is movably connected to the Y-axis screw (11) through the first slider (3). The suction nozzle (5) is installed on the X-axis screw (10), and the conical hopper (6) is located below the suction nozzle (5). The corn kernel rotation conveying module (b) includes a first tray (12), a first circular hole (13), a rotating rod (14), a second tray (15), a drive motor (16), a third tray (19), and a three-bladed turntable (26). The upper end of the drive motor (16) is connected to the three-bladed turntable (26). Three rotating rods (14) are installed on the outer wall of the three-bladed turntable (26), and the first tray (12), the second tray (15), and the third tray (19) are installed on the outer ends of the rotating rods (14). The near-infrared spectral identification module (c) includes a near-infrared light source (22), a miniature near-infrared spectrometer (23), a second base (24), and a support frame (25). The lower end of the support frame (25) is fixed to the second base (24), and the near-infrared light source (22) and the miniature near-infrared spectrometer (23) are installed on the upper side of the support frame (25) for infrared spectral identification of corn kernels transported by the rotating tray. The corn kernel air-blowing sorting module (d) includes a first air-blowing pipe (17), a second air-blowing pipe (18), a first hopper (20), and a second hopper (21). The outer end of the first air-blowing pipe (17) corresponds to the first hopper (20), and the outer end of the second air-blowing pipe (18) corresponds to the second hopper (21). After infrared spectroscopy identification, the corn kernels are rotated and transferred to the outer ends of the first air-blowing pipe (17) and the second air-blowing pipe (18) through a tray. The corn kernels are blown into the corresponding hoppers according to the identification results.

2. The corn kernel near-infrared spectral sorting device according to claim 1, characterized in that: The lower end of the Y-axis lead screw (11) is fixedly installed on the base (9). The X-axis lead screw (10) is driven to move up and down through the first slider (3). The second slider (4) is installed on the X-axis lead screw (10) and moves laterally along the X-axis lead screw (10).

3. The corn kernel near-infrared spectral sorting device according to claim 2, characterized in that: The suction nozzle (5) is connected to the second slider (4) via a mounting base, and the suction nozzle (5) is connected to the vacuum pump placed on the base (9) via a pipeline, a pressure sensor and a solenoid valve.

4. The corn kernel near-infrared spectral sorting device according to claim 3, characterized in that: The upper end of the Y-axis lead screw (11) is connected to the first stepper motor (1), and the right end of the X-axis lead screw (10) is connected to the second stepper motor (2).

5. The corn kernel near-infrared spectral sorting device according to claim 4, characterized in that: The outer wall of the three-bladed turntable (26) is equipped with three rotating rods (14) spaced 120 degrees apart. The three-bladed turntable (26) is driven to rotate by the drive motor (16), which in turn drives the three rotating rods (14) to rotate, thereby moving the tray connected to the outer end to move its position. The corn kernels are picked up and sampled at 0°, 120° and 240°, respectively, and near-infrared spectroscopy identification and air blowing sorting are performed.

6. The corn kernel near-infrared spectral sorting device according to claim 5, characterized in that: When the first tray (12) is located on one side of the conical hopper (6), the second tray (15) is located between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the third tray (19) is located on the side of the first sub-hopper (20) and the second sub-hopper (21); when the first tray (12) rotates to the side between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), the second tray (15) is located on the side of the first sub-hopper (20) and the second sub-hopper (21), and the third tray (19) returns to one side of the conical hopper (6); when the first tray (12) rotates to the side of the first sub-hopper (20) and the second sub-hopper (21), the second tray (15) comes to one side of the conical hopper (6), and the third tray (19) comes to the side between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and so on.

7. The near-infrared spectral sorting device for corn kernels according to claim 6, characterized in that: The first air pipe (17) and the second air pipe (18) are connected to the air source through pipelines and solenoid valves, respectively, and air nozzles are installed on the first air pipe (17) and the second air pipe (18).

8. The near-infrared spectral sorting device for corn kernels according to claim 7, characterized in that: Splash guards are installed at the entrances of the first hopper (20) and the second hopper (21), respectively.

9. A method of using the near-infrared spectral sorting device for corn kernels as described in claim 8, characterized in that: The process includes the following: (1) First, place the corn kernels into the conical hopper (6), then control the electric push rod (8) to lift, and lift a corn kernel through the top rod (7). The top of the top rod (7) has a groove that can hold a corn kernel. (2) The X-axis lead screw (10) and Y-axis lead screw (11) fixed on the base (9) are driven by the second stepper motor (2) and the first stepper motor (1) respectively. The air suction nozzle (5) installed at the lower end of the slider (4) is moved to the top rod (7) through the linkage of the X-axis and Y-axis lead screws to suck up the corn kernels. If the air suction tube is blocked by the corn kernels, it means that the corn kernels have been sucked up. Otherwise, the action of lifting the corn kernels and the action of sucking up the air are repeated until the corn kernels are sucked up. (3) The combined action of the X-axis lead screw (10) and the Y-axis lead screw (11) moves the suction nozzle (5) above the round hole (13) of the first tray (12), opens the air path solenoid valve, and the suction nozzle (5) releases the corn kernels at the position of the round hole (13) of the first tray (12). At this time, the second tray (15) is located between the near-infrared light source (22) and the miniature near-infrared spectrometer (23), and the third tray (19) is located on the side of the first hopper (20) and the second hopper (21). (4) By rotating the drive motor (16) by 120 degrees, the three-bladed turntable (26) drives the three trays at the outer end of the rotating rod (14) to move to the position, and the first tray (12) is sent between the near-infrared light source (22) and the miniature near-infrared spectrometer (23). The near-infrared light source (22) and the miniature near-infrared spectrometer (23) are installed and fixed by the support frame (25) and the second base (24). The corn kernels are classified into A and B categories by diffuse transmission or diffuse reflection. (5) After the identification and classification are completed, the drive motor (16) rotates 120 degrees to rotate and transport the first tray (12) to the side of the first hopper (20) and the second hopper (21). If the corn kernels are identified as B, the first air pipe (18) is controlled to blow them into the first hopper (21). If the corn kernels are identified as A, the second air pipe (17) is controlled to blow the corn kernels into the second hopper (20) to achieve the sorting of corn kernels.

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