Visual inspection and sorting system for fresh soybean sorting

Abstract

The utility model discloses a visual inspection and sorting system for fresh soybean sorting, which comprises a control device, a vibration sequencing device, a belt conveying device, a visual acquisition device and an airflow nozzle, the vibration sequencing device and the airflow nozzle are respectively positioned at a feeding end and a discharging end of the belt conveying device, and a corrugated plate of the vibration sequencing device is provided with a first conveying channel; a plurality of annular partition strips are arranged on a transparent belt of the belt conveying device, a second conveying channel is formed between the partition strips, a surface cleaning device is arranged below the transparent belt, a first visual collecting device is arranged above the position close to the output end of the transparent belt, and a second visual collecting device is arranged in an annular space defined by the transparent belt. The visual collection device transmits collected information to the control device, the collected information is processed by the control device, and the airflow nozzle is controlled to classify the fresh soybeans. The system is high in execution response speed and accurate, the airflow pressure of the airflow nozzles is consistent, leakage blowing or mistaken blowing is reduced, and the sorting effect under the high-flux condition is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fresh soybean sorting technical field, more specifically, relate to a fresh soybean sorting visual detection and sorting system. BACKGROUND

[0002] In recent years, the consumption demand of fresh soybean gradually increases, and the overall quality of fresh soybean is required to be higher, mainly including size, color and other aspects of requirements. After the fresh soybean is received, it needs to be strictly selected in quality, and the unqualified pod materials and impurities are removed.

[0003] At present, the equipment for color selection of fresh soybean often adopts flat belt conveying, the soybeans are laid on the flat belt by the front equipment, and are conveyed at high speed on the flat belt, and are thrown out at the output end of the conveying belt relying on inertia, a visual acquisition device is arranged above the throwing position, and the collected image information is transmitted to the control device in real time, since the conveying speed of soybeans is fast, the visual acquisition device and the air jet nozzle are located in the same area, the collected fresh soybean information is quickly transmitted to the control device for classification judgment, and then the air blowing action is executed by the execution device, the setting mode often requires high processing speed, and the hardware cost is high. At the same time, since the air jet nozzle device for executing classification is also one of the core components of fresh soybean sorting, its main function is to remove unqualified materials and impurities from the whole by high-speed jet of air flow, so as to realize the sorting of fresh soybean pod materials, the existing conveying equipment makes the distribution position of the materials on it relatively disorderly, since the particle size of impurities and unqualified pod materials and qualified materials is different, if the diameter of the air outlet of the air jet nozzle is greater than the particle size of the materials, the high-pressure gas blown out will take the materials beside the impurities together, which will reduce the production of qualified materials; if the diameter of the air outlet of the air jet nozzle is small and the distance between adjacent air outlets is large, the impurities and unqualified materials cannot be blown, which reduces the sorting efficiency and quality of fresh soybean. At the same time, the materials on the conveying flat belt have poor boundary feeling, the air jet nozzle outlet direction is relatively fixed, and the air flow of the air jet nozzle outlet exists divergence phenomenon, so that there are many misblowing phenomena, which seriously affects the sorting accuracy of fresh soybean. CONTENT OF THE UTILITY MODEL

[0004] In view of the technical problems that the visual acquisition and the air jet nozzle in the prior art are located above the material throwing track, higher requirements are put forward for data processing speed and response ability of execution element, the hardware cost is high, at the same time, the air blowing precision of the air jet nozzle is not high, and the pulse jet air flow pressure is weak, the utility model provides a visual detection and sorting system for soybean sorting, a separation strip is arranged on the conveying belt, and upper and lower visual acquisition is executed, air blowing action is executed at the throwing track, the air nozzle structure is optimized to reduce missed blowing or misblowing, the air flow pressure is consistent, and the sorting effect under high throughput condition is improved.

[0005] The technical solutions adopted are as follows:

[0006] A visual detection and sorting system for fresh soybeans includes a control device, a vibration sorting device, a belt conveying device, a visual acquisition device, and an air jet nozzle electrically connected to the control device. The vibration sorting device is arranged at the feeding end of the belt conveying device, and the air jet nozzle is arranged at the output end of the belt conveying device. The vibration sorting device includes a corrugated plate provided with a plurality of first conveying channels arranged in the conveying direction. The belt conveying device includes a transparent belt provided with a plurality of annular partition strips arranged in the longitudinal direction. The second conveying channel is formed between adjacent two partition strips, and the width of the second conveying channel is slightly larger than the widest dimension of the soybean pod. The first conveying channel and the second conveying channel correspond to each other in front and back. A surface cleaning device for cleaning the second conveying channel is arranged at the lower rotary part of the transparent belt, and the surface cleaning device is electrically connected to the control device. A light supplementing lamp and a first visual acquisition device are arranged above the output end of the transparent belt. The inside of the annular space formed by the transparent belt is provided with a second visual acquisition device. The first visual acquisition device and the second visual acquisition device synchronously acquire the upper and lower surface information of the fresh soybeans and transmit the acquired information to the control device. The control device performs classification on the fresh soybeans according to the acquired information through the control of the air jet nozzle.

[0007] Further, the first visual acquisition device and the second visual acquisition device are arranged in an upper and lower relationship, and synchronously acquire the upper and lower surface information of the same fresh soybean and synchronously transmit the information to the control device for processing.

[0008] Further, a plurality of groups of first visual acquisition devices arranged in front and back are arranged along the conveying direction of the transparent belt, and a plurality of groups of second visual acquisition devices arranged in front and back are arranged in the annular space formed by the transparent belt. The plurality of groups of first visual acquisition devices and the plurality of groups of second visual acquisition devices are arranged in a one-to-one correspondence or staggered arrangement.

[0009] Preferably, the partition strip is a transparent partition strip with a herringbone cross-section.

[0010] Further, the air flow nozzle comprises a nozzle body, one end surface of the nozzle body is provided with a plurality of air inlets, the other end surface is provided with a plurality of air outlets arranged in a line and corresponding to the second conveying channels one by one, the air outlet direction of the air outlet is 30°-90° to the soybean conveying path, the air inlets and the air outlets are connected one by one through smooth air flow channels, the front end of the air flow channel is sequentially provided with a converging pipe, a throat pipe and a diverging pipe along the air flow direction, the two ends of the throat pipe are connected to the converging pipe and the diverging pipe through a circular arc, and the outlet end of the diverging pipe extends to the air outlet with an equal inner diameter.

[0011] Further, the air flow nozzle is arranged in two groups in parallel along the soybean conveying path, and is provided with a separation plate below the position of the soybean conveying path, and the two groups of air flow nozzles are arranged on the two sides of the separation plate respectively.

[0012] Further, the inner diameter of the throat pipe is 1mm, the length of the throat pipe is 0.5-1 times of the inner diameter of the throat pipe, the length of the converging pipe is 3-5 times of the inner diameter of the throat pipe, the taper angle of the converging pipe is 30°-45°, and the diverging angle of the diverging pipe is 8°-12°.

[0013] Preferably, the inner diameter of the air inlet is 4mm, and the inner diameter of the air outlet is 2-3mm.

[0014] Preferably, the nozzle body is provided with two rows of air inlets arranged in a staggered manner on the air inlet end surface.

[0015] Further preferably, the surface cleaning device comprises a dust cleaning brush, a supporting rod, a guide sliding groove, a first crank, a second crank and a rotating rudder, the dust cleaning brush is provided with bristles corresponding to the second conveying channels on the transparent belt one by one, the supporting rod is vertically arranged on the lower end surface of the dust cleaning brush and penetrates the guide sliding groove up and down, the guide sliding groove is vertically fixed below the transparent belt, one end of the first crank is hinged to the lower end of the supporting rod, the other end of the first crank is hinged to one end of the second crank, the other end of the second crank is rotationally connected with the rotating rudder, and the rotating rudder, the first crank, the second crank and the supporting rod form a crank connecting rod mechanism.

[0016] The technical scheme of the utility model has the following advantages:

[0017] A.The utility model discloses a system adopts transparent belt structure with a plurality of annular conveying channels, and material is laid flat on the first conveying channel through vibration sequencing, then falls on the corresponding second conveying channel in order, because the second conveying channel is transparent structure, the first visual acquisition device and the second visual acquisition device arranged up and down directly correspond and collect the upper and lower side surface information of the fresh soybean pod in the same area, and are transmitted to the control device, after processing, the air flow channel in the throwing area is controlled to execute air blowing classification, the visual acquisition device and the air jet nozzle are located in two different areas, can relieve the relationship between data processing and execution response well, the hardware processing requirement is relatively lower, and high throughput processing efficiency can be reached.

[0018] B.The utility model discloses a contraction pipe, throat pipe and gradual expansion pipe are arranged in the air flow channel of air jet nozzle, make the air flow direction of nozzle outlet edge and middle area keep consistent, and pressure is uniform, and form air atomization effect at each air outlet, combine each transparent conveying channel, can accurately make the air flow act on the middle area of fresh soybean pod, and the blast atomization air flow is more favorable to improve the sorting effect under the condition of high throughput.

[0019] C.The utility model discloses two groups of air jet nozzles, can classify different defects, the air inlet of multilayer setting makes the number of air outlet correspond with the number of air inlet, realizes the distance between air outlet, and the adjacent air outlet channel does not have obvious difference, makes the material rejection angle can be relatively consistent. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the specific embodiment, obviously, the drawings in the following description is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0021] Figure 1 It is the overall structure front view of the system provided by the utility model;

[0022] Figure 2 It is Figure 1 The structure perspective view shown in the figure;

[0023] Figure 3a It is the hierarchical detection system principle diagram that a group of first visual acquisition device, a group of second visual acquisition device and two groups of air jet nozzle are formed by the utility model;

[0024] Figure 3b It is the hierarchical detection system principle diagram that two groups of first visual acquisition device, two groups of second visual acquisition device and two groups of air jet nozzle are formed by the utility model;

[0025] Figure 4 is a perspective view of the airflow nozzle provided by the utility model;

[0026] Figure 5 is Figure 4 the perspective view shown in the figure;

[0027] Figure 6 is Figure 4 the air inlet end surface view shown in the figure;

[0028] Figure 7 is Figure 6 the A-A cross section view shown in the figure;

[0029] Figure 8 is Figure 6 the B-B cross section view shown in the figure;

[0030] Figure 9 is Figure 1 the surface cleaning device view shown in the figure;

[0031] Figure 10 is the FLUENT simulation pressure nephogram of the air nozzle of the utility model.

[0032] The identifier symbols provided in the figure are explained as follows:

[0033] 1 - power supply; 2 - vibration motor

[0034] 3 - corrugated plate

[0035] 31 - first conveying channel

[0036] 4 - switching conveying chute

[0037] 5 - conveying motor

[0038] 6 - transparent belt

[0039] 61 - second conveying channel, 62 - partition strip

[0040] 7 - rack

[0041] 8 - surface cleaning device

[0042] 81 - dust cleaning brush

[0043] 811 - bristles

[0044] 82 - support rod, 83 - guide sliding groove, 84 - first crank, 85 - second crank

[0045] 86 - rotating steering engine

[0046] 9 - airflow nozzle, 9a - first airflow nozzle, 9b - second airflow nozzle

[0047] 91 - nozzle body

[0048] 92-air flow passage

[0049] 921-converging pipe, 922-throat pipe, 923-diverging pipe

[0050] 10-control device;11-first visual acquisition device;12-finished product discharge port

[0051] 13-graded partition plate;14-second visual acquisition device;15-defect discharge port.

[0052] a-air inlet, b-air outlet;c-soybean conveying path. DETAILED DESCRIPTION

[0053] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] As Figure 1 and Figure 2The utility model provides a kind of fresh soybean sorting visual detection and sorting system, including control device 10 and the vibration sequencing device of electrical connection with control device 10, belt conveyor, vision acquisition device, airflow nozzle 9, vibration sequencing device is arranged at the feed end of belt conveyor, airflow nozzle 9 is arranged at the output end of belt conveyor, vibration sequencing device includes vibration motor 2 and corrugated plate 3, a plurality of first conveying channels 31 are equipped on corrugated plate 3 along the direction of conveyance, the outlet end of corrugated plate is connected with a switching conveying chute 4, switching conveying chute 4 is also provided with corrugated groove;Belt conveyor includes conveying motor 5 and annular transparent belt 6, conveying motor 5 drives transparent belt 6 to make annular conveying, the conveying surface of transparent belt 6 is provided with a plurality of annular partitions 62 along the direction of conveyance, second conveying channel 61 is formed between adjacent two partitions 62, and preferably partition 62 is transparent partition with herringbone cross section.The width of second conveying channel 61 is slightly larger than the widest size of pod, and first conveying channel 31 and second conveying channel 61 are one-to-one corresponding in front and back;The lower rotary part of transparent belt 6 is equipped with surface cleaning device 8 for cleaning second conveying channel 61, and surface cleaning device 8 is electrically connected with control device 10;Supplementary light and first vision acquisition device 11 are provided above the output end of transparent belt 6, supplementary light (not shown in the figure) is arranged inside first vision acquisition device 11, for illuminating the collection area, and the inside of annular space surrounded by transparent belt 6 is provided with second vision acquisition device 14, and first vision acquisition device 11 and second vision acquisition device 14 synchronously collect the upper and lower surface information of fresh soybean, and transmit the collected information to control device 10, and control device 10 executes classification on fresh soybean according to the collected information by controlling airflow nozzle 9.Of course, multiple vision acquisition devices can be provided along the direction of conveyance of transparent belt, such as Figure 3b As shown, two groups of first vision acquisition devices are provided above transparent belt, and two groups of second vision acquisition devices corresponding to the former are provided in the annular region formed by transparent belt, and of course, the first vision acquisition device and the second vision acquisition device arranged above and below can be staggered, and independent multiple groups of vision acquisition devices are used, according to different collection data, corresponding performance cameras and spectrums can be selected, and then multi-dimensional data of fresh soybean can be collected, different information data inside and outside fresh soybean are collected and data processed, and the detection of various defects of fresh soybean is quickly completed, and classification is executed according to pod fullness, size, maturity and so on.

[0055] As shown, Figure 1As shown, the first visual acquisition device 11 and the second visual acquisition device 14 are arranged oppositely in the upper and lower directions in the utility model, and are arranged on the upper and lower sides of the transparent belt 6 respectively, the information of the upper and lower sides of the same fresh soybean is collected synchronously, and is transmitted to the control device 10 for processing synchronously. The utility model sets two visual acquisition devices and airflow nozzles in two different areas, moves the visual acquisition device to the conveying position of the transparent belt, collects the material on the transparent belt in multiple dimensions, the airflow nozzle as an execution component is located at the output end of the transparent belt, the collected fresh soybean data is directly transmitted to the control device, and then the data analysis and processing module in the control device is used for data preprocessing, analysis and classification of the collected visual data, the fresh soybean signal with defects is transmitted to the airflow nozzle of the execution component, the relationship between data processing and execution response can be well relieved, the hardware processing requirement is relatively low, and high-throughput processing efficiency can be achieved.

[0056] As shown in the figure, Figures 4 to 7 The airflow nozzle 9 comprises a nozzle body 91 and an airflow channel 92 arranged in the nozzle body 91, one end surface of the nozzle body 91 is provided with a plurality of air inlets a, and the other end surface is provided with a plurality of air outlets b arranged in a line and corresponding to the second conveying channel 61 one by one, the air outlet b is arranged at an angle of 30°-90°, preferably 60°, with the soybean throwing path, and the air inlet a and the air outlet b are connected one by one through the smooth airflow channel 92, the front end of the airflow channel 92 is sequentially provided with a contraction pipe 921, a throat pipe 922 and a gradual expansion pipe 923 along the airflow direction, the two ends of the throat pipe 922 are connected to the contraction pipe 921 and the gradual expansion pipe 923 through a circular arc, and the outlet end of the gradual expansion pipe 923 extends to the air outlet b with the same inner diameter. Figure 3a And Figure 3b As shown in the figure, the airflow nozzle 9 in the utility model is provided with two groups, which are arranged in front and back along the soybean throwing path c, and are respectively a first airflow nozzle 9a and a second airflow nozzle 9b, a separation plate 13 is arranged below the soybean throwing path c, and the two groups of airflow nozzles 9 are arranged on the two sides of the separation plate 13, the first airflow nozzle 9a and the second airflow nozzle 9b perform different classification of soybean pods, for example, the first airflow nozzle 9a performs the work of removing fresh soybeans with external defects, and the second airflow nozzle 9b performs the work of removing fresh soybeans with internal defects, of course, not limited to the above-mentioned two functions, the two rows of airflow nozzles can significantly improve the removal efficiency of defective materials and avoid the problem of missing blowing. Of course, more than three groups of airflow nozzles can also be arranged, which will not be described here.

[0057] For the airflow nozzle, in this invention, the inner diameter of the throat 922 is preferably set to 1 mm, the length of the throat 922 is 0.5 to 1 times its inner diameter, the length of the contraction tube 921 is 3 to 5 times its inner diameter, the contraction angle of the contraction tube 921 is 30° to 45°, and the expansion angle of the expansion tube 923 is 8° to 12°. Preferably, the inner diameter of the air inlet a is 4 mm, and the inner diameter of the air outlet b is 2 to 3 mm.

[0058] This invention has undergone air pressure simulation tests on the airflow nozzle, such as... Figure 10 The grayscale pressure cloud map shown clearly demonstrates that the outlet pressure of the airflow nozzle of this invention is uniform and directionally consistent, with no significant pressure difference between adjacent airflow channels. In practical applications, the airflow atomization effect is created at each outlet, and combined with the transparent conveying channels, it can precisely direct the airflow to the central area of ​​fresh soybean pods. The explosive atomized airflow is more conducive to improving the sorting effect under high throughput conditions. The blown airflow is not limited to a single point, but rather to an area on the pod, without causing any damage to the pod.

[0059] To ensure that the air outlet b corresponds one-to-one with each soybean throwing path c and to avoid technical problems such as mis-blowing, this utility model has at least two rows of air inlets a arranged in an alternating pattern on the air inlet end face of the nozzle body 91. Figure 4 The system has two staggered rows of air inlets a. Since the inner diameter of the air outlet is smaller than that of the air inlet a, the air outlet b is arranged in a straight line. This arrangement is suitable for situations where the distance between two adjacent second conveying channels is small.

[0060] like Figure 9 As shown, the surface cleaning device 8 used in this utility model includes a dust-removing brush 81, a support rod 82, a guide groove 83, a first crank 84, a second crank 85, and a rotating servo motor 86. The dust-removing brush 81 is provided with bristles 811 that correspond one-to-one with the second conveying channel 61 on the transparent belt 6. The support rod 82 is vertically arranged on the lower end face of the dust-removing brush 81 and extends vertically through the guide groove 83. The guide groove 83 is vertically fixed below the transparent belt 6. One end of the first crank 84 is hinged to the outer side of the lower end of the support rod 82, and the other end of the first crank 84 is hinged to one end of the second crank 85. The other end of the second crank 85 is rotatably connected to the rotating servo motor 86. The rotating servo motor 86, the first crank 84, the second crank 85, and the support rod 82 form a crank-connecting rod mechanism. Rotating the servo motor 86 drives the second crank 85 to rotate, which in turn drives the first crank 84 to rotate, thereby driving the cleaning brush to move up and down along the guide groove. This causes the cleaning brush to move upward and the bristles to contact the second conveying channel on the bottom surface of the transparent belt, thus achieving real-time cleaning of the second conveying channel during the operation of the transparent belt.

[0061] Of course, the surface cleaning device 8 in the utility model can also adopt a fan suction mode, a main pipeline connected with a fan suction port is arranged, a plurality of suction nozzles corresponding to the second conveying channels on the lower side of the transparent belt are arranged on the main pipeline, and the cleaning of the second conveying channels can be realized through the suction effect of the suction nozzles.

[0062] The unmentioned parts of the utility model are applicable to the prior art.

[0063] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A visual inspection and sorting system for fresh soybeans, comprising a control device (10) and a vibration sorting device, a belt conveyor, a visual acquisition device, and an airflow nozzle (9) electrically connected to the control device (10), wherein the vibration sorting device is disposed at the feed end of the belt conveyor, and the airflow nozzle (9) is disposed at the output end of the belt conveyor, characterized in that, The vibration sorting device includes a corrugated plate (3), on which multiple first conveying channels (31) are provided along the conveying direction; the belt conveyor includes an annular transparent belt (6), on which multiple annular spacers (62) are provided longitudinally arranged on the conveying surface of the transparent belt (6), and a second conveying channel (61) is formed between two adjacent spacers (62). The width of the second conveying channel (61) is slightly larger than the widest dimension of the pod, and the first conveying channel (31) and the second conveying channel (61) correspond one-to-one; the lower rotating part of the transparent belt (6) is provided for cleaning the second conveying channel. (61) A surface cleaning device (8) is electrically connected to the control device (10); a supplementary light and a first visual acquisition device (11) are provided above the output end of the transparent belt (6); a second visual acquisition device (14) is provided inside the annular space enclosed by the transparent belt (6); the first visual acquisition device (11) and the second visual acquisition device (14) simultaneously acquire information on the upper and lower surfaces of the fresh soybeans and transmit the acquired information to the control device (10); the control device (10) classifies the fresh soybeans by controlling the airflow nozzle (9) according to the acquired information.

2. The visual inspection and sorting system for fresh soybeans according to claim 1, characterized in that, The first visual acquisition device (11) and the second visual acquisition device (14) are arranged vertically opposite each other, and simultaneously acquire information from the upper and lower surfaces of the same fresh soybean, and transmit it to the control device (10) for processing.

3. The visual inspection and sorting system for fresh soybeans according to claim 2, characterized in that, Multiple sets of first visual acquisition devices (11) arranged in a front-to-back manner are arranged along the conveying direction of the transparent belt (6). At the same time, multiple sets of second visual acquisition devices (14) arranged in a front-to-back manner are arranged in the annular space formed by the transparent belt (6). The multiple sets of first visual acquisition devices (11) and multiple sets of second visual acquisition devices (14) are arranged in a one-to-one correspondence or staggered arrangement.

4. The visual inspection and sorting system for fresh soybeans according to claim 1, characterized in that, The spacer (62) is a transparent spacer with a herringbone cross-section.

5. The visual inspection and sorting system for fresh soybeans according to claim 1, characterized in that, The airflow nozzle (9) includes a nozzle body (91). One end face of the nozzle body (91) is provided with a plurality of air inlets (a), and the other end face is provided with a plurality of air outlets (b) arranged in a line and corresponding one-to-one with the second conveying channel (61). The air jet direction of the air outlets (b) is at 30° to 90° with the soybean throwing path (c). The air inlets (a) and the air outlets (b) are connected one-to-one by a smooth airflow channel (92). The front end of the airflow channel (92) is provided with a contraction tube (921), a throat tube (922) and a diffuser tube (923) in sequence along the airflow direction. The two ends of the throat tube (922) are rounded to the contraction tube (921) and the diffuser tube (923). The outlet end of the diffuser tube (923) extends to the air outlet (b) with a uniform inner diameter.

6. The visual inspection and sorting system for fresh soybeans according to claim 5, characterized in that, The airflow nozzles (9) are arranged in two parallel groups along the soybean throwing path (c), and a dividing plate (13) is provided below the soybean throwing path (c). The two groups of airflow nozzles (9) are located on both sides of the dividing plate (13).

7. The visual inspection and sorting system for fresh soybeans according to claim 5, characterized in that, The inner diameter of the throat tube (922) is 1 mm, the length of the throat tube (922) is 0.5 to 1 times the inner diameter of the throat tube (922), the length of the constriction tube (921) is 3 to 5 times the inner diameter of the throat tube (922), the constriction angle of the constriction tube (921) is 30° to 45°, and the expansion angle of the expansion tube (923) is 8° to 12°.

8. The visual inspection and sorting system for fresh soybeans according to claim 7, characterized in that, The inner diameter of the air inlet (a) is 4 mm, and the inner diameter of the air outlet (b) is 2-3 mm.

9. The visual inspection and sorting system for fresh soybeans according to claim 7, characterized in that, The nozzle body (91) has two rows of air inlets (a) arranged in an alternating pattern on its air inlet end face.

10. The visual inspection and sorting system for fresh soybeans according to any one of claims 1-9, wherein the surface cleaning device (8) comprises a dust-removing brush (81), a support rod (82), a guide groove (83), a first crank (84), a second crank (85), and a rotating servo motor (86), wherein the dust-removing brush (81) is provided with bristles (811) corresponding one-to-one with the second conveying channel (61) on the transparent belt (6), and the support rod (82) is vertically arranged on the lower end face of the dust-removing brush (81) and is positioned vertically. The guide groove (83) runs through the transparent belt (6) and is vertically fixed below it. One end of the first crank (84) is hinged to the lower outer side of the support rod (82). The other end of the first crank (84) is hinged to one end of the second crank (85). The other end of the second crank (85) is rotatably connected to the rotating servo (86). The rotating servo (86), the first crank (84), the second crank (85) and the support rod (82) form a crank-connecting rod mechanism.

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