Seed selection device for crop seed germination rate based on conductivity sensing

Abstract

The application discloses a crop seed germination rate selecting device based on conductivity sensing, and relates to the technical field of intelligent agricultural machinery, and comprises a feeding unit, wherein the feeding unit comprises a spiral feeder and a stepped feeder; a stepped track in a spiral ascending shape is arranged in the spiral feeder; a stepped groove is arranged in the stepped track; and a plurality of anti-rolling flanges are arranged on the stepped groove and are used for preventing seeds from rolling away and stacking; the stepped groove with a certain interval is formed on the spiral feeder; the anti-rolling flanges are arranged at the edges of the stepped groove; the anti-rolling flanges adopt a two-piece arc welding structure; a closing gap with an inner inclination angle of 5° is formed; when the mutually stacked seeds impact the flanges, asymmetric shearing force is generated; the upper seeds are forced to rebound to the hopper in the reverse direction due to symmetric shearing force; meanwhile, the inner inclination angle of the flanges limits the rolling deviation of the seeds in the groove; the directional screening and active separation of single seeds are realized; the seed sorting efficiency is improved; and intermittent uniform-speed discharging is realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of intelligent agricultural machinery, in particular to a crop seed germination rate sorting device based on conductivity sensing. BACKGROUND

[0002] High germination rate seeds: cell membrane structure is complete, electrolyte (such as potassium ion, sugar) leakage is small, and conductivity between electrodes is low (or in a specific stable interval).

[0003] Low germination rate seeds: cell membrane is damaged (such as aging, mold), electrolyte leaks a lot, and conductivity between electrodes is significantly increased (or deviates from the standard interval).

[0004] Chinese patent application No. CN109197014A discloses a crop seed sorting machine, which comprises a cylinder, a feed inlet fixedly installed on the cylinder, a blower fixedly installed on the cylinder, a specific gravity meter placing box fixedly installed on the cylinder, the cylinder being fixedly installed on a base, a motor fixedly installed on the base, the base being fixedly connected with a base through damping springs, a discharge port fixedly installed at the bottom of the cylinder, the application can not only screen seeds, but also remove impurities such as straws and rhizomes in the seeds, and clean the seeds, so that the screened seeds are cleaner and the seed germination rate after soaking is higher.

[0005] In agricultural planting, the seed germination rate directly affects the planting density, yield and quality of crops. Traditional seed germination rate detection methods mostly rely on laboratory culture, which is time-consuming and laborious, and is difficult to meet the demand of large-scale seed selection. Although there are some preliminary screening methods based on physical characteristics, there are limitations in accuracy and efficiency. However, due to the small size of seeds, the existing seed selection equipment in intelligent agricultural machinery is either complex in structure and high in cost, or lacks detection accuracy, and some directly use naked eye observation and manual screening, which is time-consuming and inefficient, and has not been widely applied in actual agricultural production.

[0006] Therefore, the application provides a crop seed germination rate sorting device based on conductivity sensing to solve the above problems. SUMMARY

[0007] In view of the problems existing in the prior art, the application is proposed.

[0008] To solve the above technical problems, the application provides the following technical scheme: a crop seed germination rate sorting device based on conductivity sensing, which comprises a feeding unit, a conductivity detection unit, a processor, a displacement supplementing unit and a sorting unit:

[0009] The feeding unit comprises a screw type feeder and a stepped type feeder.

[0010] The spiral feeder is internally provided with a ladder-shaped track in a spiral ascending shape, the ladder-shaped track is internally provided with a ladder-shaped groove, and a plurality of anti-rolling flanges are installed on the ladder-shaped groove to prevent the seeds from rolling away and stacking.

[0011] The ladder-type feeder comprises a segmented feeding track, a driving structure for driving the segmented feeding track, and a frame structure, the segmented feeding track runs along the guide of the frame structure and the driving of the driving structure, the segmented feeding track is provided with a special-shaped groove, and the special-shaped groove is provided in a V-shaped groove, and a semicircular groove is formed in one side of the V-shaped groove.

[0012] The conductivity detection unit detects the seed conductivity value in real time, the processor determines the seed vigor grade in combination with a preset vigor threshold value, and generates a corresponding execution signal to control the displacement supplement unit and the sorting unit to perform seed sorting.

[0013] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing described in the application, the anti-rolling flanges are arranged on both sides of the ladder-shaped groove and are provided with an inner inclination angle of 5°, so that the two anti-rolling flanges form a closing structure; the anti-rolling flanges are arranged in a two-piece arc shape, and the opening direction of the anti-rolling flanges is towards the entering and flying direction of the seeds.

[0014] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing described in the application, the seed directional running speed in the spiral feeder is consistent with the running speed of the ladder-type feeder, and the distance between adjacent special-shaped grooves is the distance between adjacent ladder-shaped grooves.

[0015] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing described in the application, according to the conveying direction of the segmented feeding track, the segmented feeding track is divided into a feeding section track, a climbing section track, and a discharging section track, the bending parts of the feeding section track, the climbing section track, and the discharging section track are pressed by a pressing assembly, and under the guidance of the pressing assembly and the frame structure, the segmented feeding track is bent at different angles.

[0016] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing described in the application, the semicircular groove of the special-shaped groove in the climbing section track is horizontally placed.

[0017] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing method, two sets of correction plates are fixed on the surface of the feeding section track, the two sets of correction plates are symmetrical and have a preset distance, and the end of the correction plate is provided in a V-shaped hook shape, which is used to correct the seeds scattered on the surface of the segmented feeding track into the special-shaped groove.

[0018] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing method, the device further comprises a transition track, the transition track comprises a front transition track and a rear transition track, the front transition track is arranged between the spiral feeder and the stepped feeder, and the rear transition track is arranged between the stepped feeder and the conductivity detection unit.

[0019] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing method, the rear transition track comprises an arc-shaped track and a linear track connected to the tail of the arc-shaped track, the rear transition track comprises a bottom plate and two side plates, the bottom plate is arranged in an arc shape and has a gradually narrowing width, the two side plates are arranged along the side edges of the bottom plate, the linear track is formed by extending the narrow end of the arc-shaped track, and the gap between the linear tracks is 1.2 times the thickness of the seeds, so that the seeds are conveyed to the conductivity detection unit in a preset direction.

[0020] As a preferred scheme of the crop seed germination rate selection device based on the conductivity sensing method, two specially designed electrode plates are arranged on the linear track in a parallel upper and lower distribution, and one end of the specially designed electrode plate away from the rear transition track is connected with a high-friction resistance plate.

[0021] The processor comprises an intelligent computing system, the intelligent computing system comprises a signal acquisition module, a signal processing module, a data analysis module, and a processing module; the signal acquisition module comprises a conductivity sensor and a digital converter, the conductivity sensor is connected with the two sets of specially designed electrode plates, is used to capture the conductivity change caused by the seeds passing through the gap between the electrode plates in real time to form current II and voltage VV signals, and converts the analog signals into digital signals through the analog-to-digital converter; the signal processing module performs signal amplification and linearization correction processing on the digital signals; the data analysis module is configured with a seed conductivity threshold , ; the data analysis module obtains the seed conductivity , compares the obtained seed conductivity with the seed conductivity threshold, and generates an execution signal, and the signal processing module controls the displacement supplement unit and the sorting unit to perform actions based on the execution signal.

[0022] As a preferred scheme of the crop seed germination rate selecting device based on the conductivity sensing method, the sorting unit comprises a high-speed electromagnetic air valve, a sorting slide and a collection box.

[0023] The application has the following beneficial effects: the stepped grooves with certain intervals are formed on the spiral feeder, and the anti-rolling flanges are arranged at the edges of the stepped grooves, the anti-rolling flanges adopt a two-piece arc welding structure, and form a 5° inward inclination "close end", when the seeds stacked on each other impact the flanges, asymmetric shearing force is generated, and the upper layer of seeds is forced to rebound to the hopper in the opposite direction, meanwhile, the inward inclination of the flanges limits the rolling deviation of the seeds in the grooves, so that the directional screening and active separation of single seeds are realized, the seed sorting efficiency is improved, and intermittent uniform discharge is realized; secondly, the special-shaped grooves are formed on the spiral feeder, so that the seeds are continuously and stably transferred from the stepped grooves to the special-shaped grooves, "zero interval" relay conveying is realized, the recess on one side of the special-shaped groove is in a semicircular groove shape, and is used for accurately receiving the seeds, and the other side of the special-shaped groove is in a V-shaped groove, the seeds repeatedly entering the special-shaped groove impact the V-shaped groove surface of the special-shaped groove and rebound out of the special-shaped groove, so that the difficult-to-separate seeds in the detection process are realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the crop seed germination rate selecting device based on the conductivity sensing method;

[0026] Figure 2 It is an enlarged view of the A part structure in the application; Figure 1

[0027] Figure 3 It is a schematic diagram of the overall structure of the spiral feeder in the application;

[0028] Figure 4 It is a schematic diagram of the overall structure of the stepped feeder in the application;

[0029] Figure 5 It is an enlarged view of the B part structure in the application; Figure 4

[0030] Figure 6 ​​Fig. 1 is a schematic diagram of the structure of the present application; Figure 4 Fig. 2 is a schematic diagram of the structure of the present application;

[0031] Figure 7 Fig. 3 is a schematic diagram of the structure of the present application; Figure 4 Fig. 4 is a schematic diagram of the structure of the present application;

[0032] Figure 8 Fig. 5 is a schematic diagram of the structure of the present application;

[0033] Figure 9 Fig. 6 is a schematic diagram of the structure of the present application;

[0034] Figure 10 Fig. 7 is a schematic diagram of the structure of the present application; Figure 9 Fig. 8 is a schematic diagram of the structure of the present application;

[0035] Figure 11 Fig. 9 is a schematic diagram of the structure of the present application.

[0036] 100, feeding unit; 110, spiral feeder; 111, hopper; 112, base plate; 113, stepped track; 114, stepped groove; 115, anti-rolling flange; 120, stepped feeder; 121, sectional feeding track; 122, driving structure; 1221, driving motor; 1222, guide roller; 1223, connecting shaft; 123, frame structure; 1231, guide track plate; 1232, guide short plate; 124, special-shaped groove; 1241, semicircular groove; 125, pressing assembly; 1251, bent plate; 1252, rotating roller; 1253, pressing wheel; 126, guide strip; 127, correcting plate; 128, square groove; 200, conductivity detection unit; 210, special electrode plate; 220, high-friction barrier plate; 300, transition track; 310, front transition track; 320, rear transition track; 321, arc-shaped track; 322, linear track; 400, displacement supplement unit; 410, transverse moving unit; 420, longitudinal displacement unit; 430, V-shaped plate; 500, sorting unit; 510, high-speed electromagnetic air valve; 520, sorting slide; 530, collection box; 600, support frame; 700, recovery box. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the drawings.

[0038] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0040] like Figures 1-11 As shown, an intelligent seed selection device for crop seeds with conductivity sensing consists of a feeding unit 100, a conductivity detection unit 200, a transition track 300, a displacement supplement unit 400, a sorting unit 500, a processor, a support frame 600, and a recycling bin 700.

[0041] The feeding unit 100 includes a spiral feeder 110 and a stepped feeder 120. The spiral feeder 110 is composed of a hopper 111, a chassis 112, and a vibration source. The hopper 111 is placed on the upper end of the chassis 112 and is used to store loose seeds to be sorted. The vibration source is placed in the inner cavity of the chassis 112 and uses an electromagnet or piezoelectric ceramic as a power source. The vibration source generates high-frequency micro-amplitude vibration and transmits it to the hopper 111 to cause the material in the hopper 111 to move in a directional manner. The stepped feeder 120 is connected to the outlet of the hopper 111, receives the seeds conveyed by the hopper 111, and conveys them in a directional manner to the conductivity detection unit 200.

[0042] Reference Figure 3 As shown, a spiral-shaped stepped track 113 is provided inside the hopper 111, which extends from the bottom of the hopper 111 to the discharge port of the spiral feeder 110. Multiple stepped grooves 114 are provided inside the stepped track 113, and the multiple stepped grooves 114 are distributed at equal intervals along the spiral track for staged screening and directional seed selection.

[0043] For example, the groove depth of the stepped groove 114 is 0.6-1.2 times the seed thickness, and the groove spacing of the stepped groove 114 is 1.5-2 times the seed diameter. The stepped groove depth of 0.6-1.5 times the seed thickness is used to achieve single seed retention, and the stepped groove spacing of 1.5-2 times the groove spacing is used to prevent multiple seeds from sticking together. This avoids the stepped groove spacing being too small, which could cause seeds to cross the boundary and enter the same stepped groove 114 due to vibration, and also avoids the stepped groove spacing being too large, which would reduce the seed conveying efficiency.

[0044] Exemplarily, the stepped groove 114 is a U-shaped groove, which is arranged to fit the round seeds and limit the rolling. The groove width of the stepped groove 114 is 1.1 times the thickness of the seeds, and the groove depth is 0.6 times the thickness of the seeds. The stepped groove 114 is additionally provided with a plurality of anti-rolling flanges 115, which correspond to the stepped groove 114 and are arranged at the groove opening of the stepped groove 114. The anti-rolling flanges 115 and the two sides of the groove opening of the stepped groove 114 form a 5° inwardly inclined flange. The anti-rolling flanges 115 are used to prevent the seeds in the stepped groove 114 from rolling away and to prevent the stacking of multiple seeds. Specifically, each group of anti-rolling flanges 115 with a 5° inwardly inclined angle forms a “closed” structure. When the stacked seeds hit the anti-rolling flanges 115 or the seeds in the stepped groove 114, a lateral contact force is generated, and then the anti-rolling flanges 115 with a 5° inwardly inclined angle exert an asymmetric shear force on the stacked seeds, forcing one of the seeds to bounce back to the hopper 111, thereby actively separating the multiple seeds.

[0045] Exemplarily, the anti-rolling flanges 115 are arranged in a two-piece arc shape and are welded.

[0046] Referring to Figures 4-10 As shown, the stepped feeder 120 includes a segmented feeder track 121, a driving structure 122 for driving the segmented feeder track 121, and a frame structure 123. The segmented feeder track 121 is arranged in a belt shape and is folded at different angles under the guidance of the frame structure 123. According to the conveying direction of the segmented feeder track 121, the segmented feeder track 121 is divided into an inlet section track, a climbing section track, and an outlet section track. The bending portions of the inlet section track and the climbing section track, and the bending portions of the climbing section track and the outlet section track are all pressed by a pressing assembly 125. Under the guidance of the pressing assembly 125 and the frame structure 123, the segmented feeder track 121 is folded at different angles.

[0047] Exemplarily, the inlet section track, the climbing section track, and the outlet section track are all provided with profiled grooves 124 with consistent distance and shape. The distance between adjacent profiled grooves 124 is the same as the distance between adjacent stepped grooves 114.

[0048] Exemplarily, the profiled groove 124 is a V-shaped groove, one side of which is concave to form a semicircular groove 1241. The semicircular groove 1241 is arranged on one side of the inlet section track close to the stepped track 113, and the groove width of the semicircular groove 1241 is 1.2 times the thickness of the seeds.

[0049] Exemplarily, the outlet section track and the inlet section track are both arranged horizontally.

[0050] Exemplarily, the semicircular groove 1241 of the special-shaped groove 124 on the climbing track is horizontally placed, the seeds enter the semicircular groove 1241 and then enter the climbing track and the discharging track in turn, the seeds are discharged through the special-shaped groove 124 on the discharging track, and the seeds fall under the action of gravity.

[0051] As shown in Figure 9 and Figure 10 , the frame structure 123 includes two groups of parallel guide rail plates 1231, and the two groups of guide rail plates 1231 are supported and fixed by the support frame 600. The opposite surfaces of the two guide rail plates 1231 are provided with guide short plates 1232 for guiding the segmented feeding track 121.

[0052] Exemplarily, the driving structure 122 includes a driving motor 1221 and a driving assembly, the driving assembly includes a guide roller shaft 1222 and a connecting thin shaft 1223, the driving motor 1221 is fixed to the side surface of the guide rail plate 1231, the number of the guide roller shaft 1222 is two, the two guide roller shafts 1222 are connected through the connecting thin shaft 1223 and realize synchronous operation through the connecting thin shaft 1223; wherein the two guide roller shafts 1222 rotate and are clamped on the two guide rail plates 1231, and the output end of the driving motor 1221 is connected to one guide roller shaft 1222 to drive the guide roller shaft 1222 and the connecting thin shaft 1223 to rotate synchronously.

[0053] A group of driving assemblies are also arranged at the bottom end of the segmented feeding track 121, and the two groups of driving assemblies are close to the segmented feeding track 121 to drive the segmented feeding track 121 to rotate and convey the seeds.

[0054] Exemplarily, the segmented feeding track 121 is provided with two parallel guide strips 126, the guide strips 126 are laid along the surface of the segmented feeding track 121, and the guide strips 126 are clamped in the compression assembly 125 to accurately segment the segmented feeding track 121.

[0055] As shown in Figure 4 and Figure 7 , the number of the compression assembly 125 is multiple, and each group of the compression assembly 125 is arranged at different bending positions of the segmented feeding track 121. The number of each group of the compression assembly 125 is two, and each group of the compression assembly 125 is arranged on the two sides of the segmented feeding track 121. The compression assembly 125 includes a bending plate 1251, a rotating roller 1252 and a compression wheel 1253, the compression wheel 1253 is fixedly provided with a ball bearing, the ball bearing is rotatably installed at the end of the rotating roller 1252, the rotating roller 1252 is fixedly installed on the bending plate 1251, and the bending plate 1251 supports the rotating roller 1252 and the compression wheel 1253. The bending plate 1251 is fixed to the guide rail plate 1231 by bolts.

[0056] As shown in Figure 4 and Figure 6 The surfaces of the two groups of guide rail plates 1231 are fixed with two groups of alignment plates 127, the two groups of alignment plates 127 are symmetrical and a certain distance apart, the alignment plates 127 are arranged in a V-shaped hook away from the guide rail plates 1231, which are used to align the scattered seeds on the surface of the segmented feeding rail 121 into the special-shaped grooves 124.

[0057] Exemplarily, the segmented feeding rail 121 is provided with square grooves 128 on both sides of the special-shaped grooves 124.

[0058] Exemplarily, a recycling box 700 is arranged at the bottom of the segmented feeding rail 121, which is used to recycle the seeds rolled down by the feeding section rail or the climbing section rail.

[0059] Exemplarily, the transition rail 300 includes a front transition rail 310 and a rear transition rail 320, the front transition rail 310 is arranged between the spiral feeder 110 and the stepped feeder 120, and is used to transport the seeds discharged from the discharge port of the spiral feeder 110 into the feeding port of the stepped feeder 120. The rear transition rail 320 is arranged between the stepped feeder 120 and the electrical conductivity detection unit 200.

[0060] The transition rail is used to receive the seeds discharged from the discharge section rail of the stepped feeder 120, and guide the seeds to the electrical conductivity detection unit 200 by the rear transition rail 320.

[0061] Exemplarily, the front transition rail 310 and the rear transition rail 320 are consistent in shape, referring to Figure 8 and Figure 9 The rear transition rail 320 includes an arc-shaped rail 321 and a linear rail 322 connected to the tail of the arc-shaped rail 321, and the rear transition rail 320 includes a bottom plate and two side plates, the bottom plate is arranged in an arc shape and gradually narrows in width, the two side plates are laid along the side edges of the bottom plate, the linear rail 322 is formed by extending from the narrow end of the arc-shaped rail 321, the gap between the linear rails 322 is 1.2 times the thickness of the seeds, and the linear rail 322 is used to transport the seeds into the electrical conductivity detection unit 200 in a certain direction.

[0062] Exemplarily, the front transition rail 310 and the rear transition rail 320 are both supported by the support frame 600, and the number of the support frame 600 is multiple groups, which are distributed at different positions of the electrical conductivity sensing crop seed intelligent seed selection device.

[0063] Referring to Figure 1As shown, the conductivity detection unit 200 includes two sets of special electrode plates 210, which are made of corrosion-resistant titanium alloy material and have a uniform rough texture on the surface through micro-nano processing to enhance the contact effect with the seeds. The distance between the two sets of special electrode plates 210 is controlled to be 1.3 times the thickness of the seeds to ensure that the seeds form a closed loop between the two electrode plates.

[0064] As an example, the conductivity detection unit 200 further includes a high-friction resistance plate 220 connected to the tail end of the special electrode plate 210, through which the seeds slide and stay on the high-friction resistance plate 220.

[0065] As an example, the high-friction resistance plate 220 gives the seeds a larger friction force, and the seeds stop after sliding a certain distance from the high-friction resistance plate 220.

[0066] As shown, Figure 1 The support frame 600 supports the two sets of special electrode plates 210, and the support frame 600 here is made of alumina ceramic material for fixing and insulating the two sets of special electrode plates 210. The two sets of special electrode plates 210 are arranged in parallel under the support of the support frame 600.

[0067] As an example, the processor includes an intelligent computing system, which includes a signal acquisition module, a signal processing module, a data analysis module, and a processing module. The signal acquisition module includes a conductivity sensor and a digital converter, the conductivity sensor is connected to the two sets of special electrode plates 210, and is used to capture the conductivity change caused by the seeds passing through the electrode plate gap in real time to form current II and voltage VV signals, and to convert analog signals into digital signals through an analog-to-digital converter; the signal processing module performs signal amplification and linearization correction processing on the digital signal; the data analysis module is configured with a seed conductivity threshold (G , ); the data analysis module obtains the seed conductivity , compares the obtained seed conductivity with the seed conductivity threshold, and generates an execution signal, and the processing module controls the displacement supplement unit 400 and the sorting unit 500 to perform actions based on the execution signal.

[0068] Among them, the above is the electrode geometric constant, which is determined by calibration, is the current and voltage ratio formed when the seed passes through the electrode plate gap.

[0069] The displacement supplement unit 400 is arranged on one side of the high-friction resistance plate 220 with a certain gap distance from the high-friction resistance plate 220, and is used to adjust the seeds staying on the high-friction resistance plate 220.

[0070] As shown in Figure 1 , Figure 11 , the sorting unit 500 includes three groups of high-speed electromagnetic air valves 510, sorting slides 520 and collection boxes 530. The three groups of high-speed electromagnetic air valves 510 are arranged in parallel and have air outlets facing the same direction. The three groups of high-speed electromagnetic air valves 510 are located on the side of the high-friction resistance plate 220 away from the displacement supplement unit 400. The sorting slides 520 are arranged on the surface of the high-friction resistance plate 220 along the direction of the air jet of the high-speed electromagnetic air valves 510. The collection boxes 530 are located on the same side of the high-friction resistance plate 220 close to the displacement supplement unit 400 and are located below the discharge port of the sorting slides 520.

[0071] For example, the sorting slides 520 are made of smooth polycarbonate material and have a low friction coefficient to ensure smooth sliding of the seeds.

[0072] The three groups of high-speed electromagnetic air valves 510 are internally equipped with controllers for receiving execution signals to trigger air jet. The three groups of high-speed electromagnetic air valves 510 are respectively a first electromagnetic air valve, a second electromagnetic air valve and a third electromagnetic air valve.

[0073] For example, the three groups of collection boxes 530 are respectively a high germination rate seed box, a low germination rate seed box and a seed box for re-inspection. The three groups of sorting slides 520 are respectively a first slide, a second slide and a third slide. The gas blown by the first electromagnetic air valve blows the seeds on the surface of the first slide, and the seeds are affected by the gas to fall into the high germination rate seed box. The gas blown by the second electromagnetic air valve blows the seeds on the surface of the second slide, and the seeds are affected by the gas to fall into the low germination rate seed box. The gas blown by the third electromagnetic air valve blows the seeds on the surface of the third slide, and the seeds are affected by the gas to fall into the seed box for re-inspection.

[0074] It should be noted that the area where the seeds slide on the surface of the high-friction resistance plate 220 is called a stable zone. The first slide, the second slide and the third slide are all arranged behind the stable zone. The displacement supplement unit 400 starts to sweep from the starting section of the stable zone and then sweeps the seeds to the corresponding area.

[0075] For example, based on the execution signal, the displacement supplement unit 400 moves the seeds sliding and staying on the high-friction resistance plate 220 to the area where the first slide, the second slide or the third slide is located. The first electromagnetic air valve, the second electromagnetic air valve or the third electromagnetic air valve is opened to blow high-pressure gas to blow the seeds to slide on the sorting slide 520 to the corresponding collection box 530.

[0076] As shown in Figure 11As shown, the displacement supplement unit 400 includes a transverse movement unit 410 and a longitudinal displacement unit 420 connected to the transverse movement unit 410 to achieve coordinated displacement in the transverse and longitudinal directions, and a V-shaped plate 430 connected to the bottom end of the longitudinal displacement unit 420, which pushes the seeds to move on the high-friction resistance plate 220 through a pushing force, and the seeds are guided and offset to the center groove of the V-shaped plate 430 by the high-friction resistance plate 220 and the V-shaped plate 430 to adjust the position of the seeds.

[0077] The transverse movement unit 410 is provided in a linear guide rail sliding table module, the longitudinal displacement unit 420 includes a frame body and an electric cylinder, the V-shaped plate 430 is connected to the bottom of the frame body, and the electric cylinder is used to drive the frame body to move up and down.

[0078] Working principle: The scattered seeds in the hopper 111 are guided to move directionally along the spiral ascending stepped track 113 under the catalysis of high-frequency micro-amplitude vibration generated by the electromagnet or piezoelectric ceramic vibration source in the bottom disc 112. The stepped track 113 is designed in a spiral shape, the stepped groove 114 has a depth of 0.6-1.2 times the thickness of the seeds, and the groove spacing is 1.5-2 times the diameter of the seeds, so as to ensure the residence of single seeds.

[0079] The stepped groove 114 is provided with a 5° inwardly inclined anti-rolling stop edge 115 on both sides to form a “closed” structure. When multiple seeds are stacked into the stepped groove 114, the upper seeds impact the stepped groove 114 to generate a lateral shearing force, forcing one of the seeds to bounce back to the hopper 111, thereby achieving active separation.

[0080] The seeds are intermittently discharged from the stepped track 113 through the discharge port, slide and jump into the special-shaped groove 124 of the segmented feeding track 121 via the front transition track 310, the segmented feeding track 121 is divided into a feeding section track, a climbing section track and a discharge section track, each of which is provided with a special-shaped groove 124, and the distance between adjacent special-shaped grooves 124 is the same as the distance between adjacent stepped grooves 114, and the running speed of the segmented feeding track 121 is consistent with the directional movement speed of the seeds in the spiral feeder 110.

[0081] The seeds enter the special-shaped groove 124 of the feeding section track from the outlet of the spiral feeder 110 via the front transition track 310, the semicircular sink 1241 receives the seeds and limits the rolling, the driving motor 1221 drives another guide roller shaft 1222 to rotate through the guide roller shaft 1222 and the connecting shaft 1223, and drives the segmented feeding track 121 to rotate. The compression assembly 125 applies pressure at the track bending part to prevent the track from deforming.

[0082] The seeds enter the special-shaped groove 124 of the feeding section track from the outlet of the spiral feeder 110 through the front transition track 310, and the special-shaped groove 124 is arranged in a V-shaped groove, one side of the V-shaped groove is concave to form a semicircular groove 1241, and the groove width of the semicircular groove 1241 is 1.2 times the thickness of the seed. The seed jumps into the V-shaped groove and is bounced back by the end of the V-shaped groove wall, and then enters the semicircular groove 1241, which accurately matches the shape of the seed and contains a single seed, giving the seed a certain space for movement and avoiding the seed from bouncing out of the special-shaped groove 124. Secondly, in the climbing section track, the semicircular groove 1241 of the special-shaped groove 124 is horizontally placed, and when the seed reaches the climbing section track along with the operation of the segmented feeding track 121, the seed can be stably placed in the semicircular groove 1241 due to the horizontal state of the semicircular groove 1241 side, and will not roll or slide due to the inclination of the track. This ensures the stability of the seed during the climbing process, prevents the seed from being effectively transported due to the vibration of the driving motor 1221, and lays a solid foundation for the subsequent accurate entry into the discharging section track and smooth discharging.

[0083] Among them, the seed bounced out of the special-shaped groove 124 in the feeding section track stays in the segmented feeding track 121, and is guided to the correct position by the resistance of the correcting plate 127 along with the operation of the segmented feeding track 121, and stays at the V-shaped hook structure of the correcting plate 127 to push the seed into the special-shaped groove 124; the seed that does not enter the special-shaped groove 124 falls from the square groove 128 on both sides of the segmented feeding track 121 to the bottom recovery box 700, realizing the recovery of the seed.

[0084] The seed is discharged from the discharging section track and falls into the arc-shaped track 321 of the rear transition track 320, the bottom plate width of the arc-shaped track 321 gradually narrows, and the distance between the side plates gradually decreases to 1.2 times, forcing the seeds to arrange in a single column. The end of the linear track 322 is aligned with the entrance of the electrical conductivity detection unit 200, ensuring that the seed enters the detection area in a stable posture.

[0085] The conductivity sensor detects the current II and voltage VV signals formed by the seed entering the detection area in real time, and converts them into digital signals through an analog-to-digital converter. The signal processing module performs amplification and linearization correction to eliminate noise interference. The data analysis module compares the conductivity value with the preset vitality threshold value to generate an execution signal.

[0086] Specifically, the electrolyte concentration of the seed itself reflects the cell membrane integrity, the cell membrane of high-vigor seeds is complete, the ion exudation is less, the conductivity is low, the higher the germination rate, the stronger the vitality, and the seed conductivity Compared with the seed conductivity threshold value, if ≤ , generate the first execution signal, based on the first execution signal, trigger the displacement supplement unit 400 to push the seeds to the first sorting slide, start the first electromagnetic valve to spray, and the seeds enter the high vigor box;

[0087] The acquired seed conductivity Compared with the seed conductivity threshold, if , generate the second execution signal, based on the second execution signal, trigger the displacement supplement unit 400 to push the seeds to the second sorting slide, start the second electromagnetic valve to spray, and the seeds enter the low germination rate seed box;

[0088] The acquired seed conductivity Compared with the seed conductivity threshold, if <σ≤ , generate the third execution signal, based on the third execution signal, trigger the displacement supplement unit 400 to push the seeds to the third sorting slide, start the third electromagnetic valve to spray, and the seeds enter the re-inspection seed box.

[0089] The lateral movement unit 410 drives the longitudinal displacement unit 420 to move along the high-friction resistance plate 220 to the connection between the high-friction resistance plate 220 and the special electrode plate 210. When starting, the longitudinal displacement unit 420 is pressed to contact the high-friction resistance plate 220. Based on the execution signal, the lateral movement unit 410 drives the longitudinal displacement unit 420 and the V-shaped plate 430 to move towards the seeds. The V-shaped plate 430 pushes the seeds on the high-friction resistance plate 220 through the pushing force. The guiding effect of the high-friction resistance plate 220 and the V-shaped plate 430 makes the seeds deviate to the center groove of the V-shaped plate 430, so as to accurately adjust the position of the seeds and make them align with the corresponding sorting slide 520.

[0090] A method for accelerating germination: using a crop seed germination rate selection device based on conductivity sensing to sort the same batch of seeds, after screening, into a high germination rate seed tank, a low germination rate seed tank, and a seed tank to be rechecked, and then selecting 200-300 seeds from the high germination rate seed tank, the low germination rate seed tank, and the seed tank to be rechecked as experimental samples, then conducting standardized germination experiments on the high, low, and recheck groups of seeds after sorting, laying sterile filter paper in a constant temperature and humidity incubator, recording the number of germinated seeds with radicle breaking through seed coat >=2mm at regular intervals every day, observing continuously until the 7th day, and verifying the threshold effectiveness through germination rate data; if the germination rate of the low germination rate tank approaches zero and the recheck tank has some germinated seeds, then dynamically narrow the conductivity threshold range through linear regression or machine learning algorithm, and classify the actually germinable seeds in the recheck tank into the high germination rate tank, while updating the threshold parameters of the sorting system, forming a closed-loop optimization system of "detection-sorting-germination verification-threshold iteration". During the process, regular electrode calibration, optical attitude sensor assisted removal of abnormal contact seeds, high-speed piezoelectric ceramic valve precise blowing, and other optimization measures are required to ensure the stability of the sorting.

[0091] Of course, the above only describes preferred embodiments of the present application and should not be considered as limiting the scope of the embodiments of the present application. The present application is also not limited to the above examples, and equivalent changes and improvements made by those skilled in the art within the spirit and principles of the present application should be included in the scope of the present application.

[0092] Finally, it should be noted that in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0093] Secondly: the drawings of the disclosed embodiments of the present application only involve the structures involved in the disclosed embodiments of the present application, other structures can refer to the usual design, and in the case of no conflict, the same embodiments and different embodiments of the present application can be combined with each other;

[0094] Finally: the above is only the preferred embodiments of the present application and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A device for selecting seeds of a crop based on the germination rate of the seeds using conductivity sensing, characterized in that, The application relates to a seed sorting device, which comprises a feeding unit (100), an electric conductivity detection unit (200), a processor, a displacement supplementing unit (400) and a sorting unit (500). The feeding unit (100) comprises a spiral feeder (110) and a stepped feeder (120); The stepped feeder (120) comprises a segmented feeding track (121), a driving structure (122) for driving the segmented feeding track (121) and a frame structure (123), the segmented feeding track (121) runs along a track under the guidance of the frame structure (123) and the driving of the driving structure (122), the segmented feeding track (121) is provided with a special-shaped groove (124), and the special-shaped groove (124) is provided in a V-shaped groove mode, one side of the V-shaped groove is concave to form a semicircular groove (1241). The electric conductivity detection unit (200) detects the seed electric conductivity value in real time, the processor determines the seed vitality grade in combination with a preset vitality threshold value, and generates a corresponding execution signal to control the displacement supplementing unit (400) and the sorting unit (500) to execute seed sorting. The anti-rolling flanges (115) are arranged on both sides of the stepped groove (114) and are provided with an inner inclination angle of 5 DEG, so that the two anti-rolling flanges (115) form a closing structure; the anti-rolling flanges (115) are arranged in a two-piece arc-shaped piece welding mode, and the opening direction of the anti-rolling flanges (115) is towards the entering and flying direction of the seeds. The seed directional running speed in the spiral feeder (110) is consistent with the running speed of the stepped feeder (120), and the distance between adjacent special-shaped grooves (124) is equal to the distance between adjacent stepped grooves (114). According to the conveying direction of the segmented feeding track (121), the segmented feeding track (121) is divided into a feeding section track, a climbing section track and a discharging section track, and the bending parts of the feeding section track, the climbing section track and the discharging section track are pressed by pressing assemblies (125), and the segmented feeding track (121) is bent at different angles under the guidance of the pressing assemblies (125) and the frame structure (123). The semicircular groove (1241) of the special-shaped groove (124) located in the climbing section track is horizontally arranged. Two groups of normalizing plates (127) are fixed on the surface of the feeding section track, the two groups of normalizing plates (127) are symmetrical and are apart from each other by a preset distance, and the end part of the normalizing plate (127) is arranged in a V-shaped hook mode, which is used for normalizing the seeds scattered on the surface of the segmented feeding track (121) and entering the special-shaped groove (124). The application further comprises 2. The electrical conductivity sensor based crop seed germination percentage seed sorting device as claimed in claim 1, wherein, ​ Transition track (300), the transition track (300) includes front transition track (310) and rear transition track (320), the front transition track (310) is arranged between spiral feeder (110) and ladder feeder (120), the rear transition track (320) is arranged between ladder feeder (120) and conductivity detection unit (200).

3. The electrical conductivity sensor based crop seed germination rate seed sorting device as claimed in claim 2, wherein: The rear transition track (320) includes arc-shaped track (321) and linear track (322) connected to the tail of the arc-shaped track (321), the rear transition track (320) includes a bottom plate and two side plates, the bottom plate is arranged in an arc shape and gradually narrows in width, the two side plates are laid along the side edges of the bottom plate, the linear track (322) is formed by extending from the narrow end of the arc-shaped track (321), the slot gap between the linear track (322) is 1.2 times the thickness of the seed, so that the seed is transported in a preset direction into the conductivity detection unit (200).

4. The electrical conductivity sensor based crop seed germination rate seed selecting apparatus as claimed in claim 3, wherein: Two special electrode plates (210) are arranged on the linear track (322) and are distributed in parallel in an up-down manner, one end of the special electrode plate (210) away from the rear transition track (320) is connected with a high-friction resistance plate (220); The processor comprises an intelligent computing system, which comprises a signal acquisition module, a signal processing module, a data analysis module and a processing module; the signal acquisition module comprises an electrical conductivity sensor and a digital converter, the electrical conductivity sensor is connected with two groups of special electrode plates (210), is used for capturing the electrical conductivity change caused by the seed passing through the electrode plate gap in real time to form current and voltage signals, and converts the analog signal into a digital signal through an analog-to-digital converter; the signal processing module carries out signal amplification and linearization correction processing on the digital signal; the data analysis module is configured with a seed conductivity threshold , ; the data analysis module acquires the seed conductivity , compares the acquired seed conductivity with the seed conductivity threshold, and generates an execution signal, and the processing module controls the displacement supplement unit (400) and the sorting unit (500) to execute actions based on the execution signal.

5. The electrical conductivity sensor based crop seed germination rate seed sorting apparatus as claimed in claim 4, wherein: The sorting unit (500) includes a high-speed electromagnetic air valve (510), a sorting slide (520) and a collection box (530), the sorting slide (520) is laid on the surface of the high-friction resistance plate (220) along the jet direction of the high-speed electromagnetic air valve (510), and the collection box (530) is located on the side of the high-friction resistance plate (220) away from the high-speed electromagnetic air valve (510), and the collection box (530) is located below the discharge port of the sorting slide (520).

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