Seed vigor detection and grading integrated equipment

Abstract

The invention discloses seed vigor detection and grading integrated equipment. The equipment comprises an operation table, a conveying belt, a spectrum detector, a negative pressure adsorption mechanism, a displacement mechanism and a controller, grid lines are arranged on the surface of the conveying belt to assist in seed positioning, a spectrum detector collects seed spectrum data, and the vigor is judged by a controller; the displacement mechanism drives the negative pressure adsorption mechanism to accurately translate and lift through an inverted U-shaped supporting frame, a guide rail, a motor and a lifting driving cylinder; the negative-pressure adsorption mechanism comprises a contraction and expansion assembly and an adsorption assembly, and the contraction and expansion assembly realizes the interval between adsorption pipes to adapt to the seed placement interval by virtue of a telescopic cylinder and a guide chute; the adsorption assembly realizes lossless adsorption and separation of the inactive seeds through an elastic adsorption nozzle, an electromagnetic valve assembly and an ejector pin; and material storage boxes are arranged below the conveying belt and the negative pressure adsorption mechanism and are used for respectively collecting vigor seeds and invigor seeds. The problems that in the prior art, detection grading is disjointed, universality is poor, and seeds are prone to damage are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seed detection, and particularly relates to a seed vitality detection and grading integrated equipment. BACKGROUND

[0002] In the links of seed production, processing, storage and sowing, accurate evaluation of seed vitality is of great significance to guarantee the safety of agricultural production and improve planting efficiency. Traditional seed vitality detection methods mainly include germination test, respiratory intensity determination, conductivity detection, tetrazolium chloride (TTC) staining, etc. Although these methods can reflect the activity state of seeds to some extent, they have defects such as long time consumption, strong destructiveness, great influence of human factors, etc., and are difficult to meet the urgent needs of modern agriculture for efficient, non-destructive and intelligent seed quality control.

[0003] In recent years, with the development of modern sensing technology and image processing technology, non-destructive detection technology of seeds based on spectral analysis, machine vision and artificial intelligence has gradually emerged. Spectral non-destructive detection has become a hot research and application direction due to its high sensitivity and non-destructiveness to the internal composition and physiological state of seeds. Chinese patent CN110291869B discloses a seed vitality non-destructive detection and grading system, which can detect and grade seeds, but it can only detect and grade single seeds each time, and the detection and grading of the next seed can be carried out again after the detection and grading of one seed is completed, so that the detection and grading process is not continuous, thereby limiting the efficiency of seed vitality detection and grading, and being not conducive to the detection and grading of large quantities of seeds. In addition, the existing mechanical separation equipment mostly adopts fixed-interval adsorption or screening structure, which cannot adapt to seeds of different sizes and different placement intervals, and has poor universality. SUMMARY

[0004] The purpose of the present application is to provide a seed vitality detection and grading integrated equipment which can be batch processed and has strong universality.

[0005] Technical scheme: The seed vitality detection and grading integrated equipment provided by the present application comprises an operation table, a conveying belt arranged on the operation table and used for conveying seeds, a spectral detector arranged above the conveying belt and used for detecting seed vitality, a negative pressure adsorption mechanism arranged on the operation table and used for separating seeds without vitality from the conveying belt, a displacement mechanism capable of driving the negative pressure adsorption mechanism to translate and lift, and a controller arranged on the operation table and electrically connected with each mechanism. The negative pressure adsorption mechanism comprises a plurality of vertically arranged adsorption assemblies and a contraction and expansion assembly used for adjusting the interval of the adsorption assemblies according to the placement interval of the seeds on the conveying belt, and the adsorption assemblies are used for corresponding suction of the seeds without vitality on the conveying belt.

[0006] Further, the surface of the conveying belt is provided with grid lines equally divided along the width, which are used to assist positioning the seeds on the conveying belt.

[0007] Preferably, the displacement mechanism comprises an inverted U-shaped support frame transversely arranged on the conveying belt, a guide rail arranged along the support frame, a translation slide seat slidingly installed on the guide rail, a motor installed on the support frame and driving the translation slide seat, a lifting slide seat installed on one side of the translation slide seat, and a lifting driving cylinder installed on the top of the translation slide seat and having an extension end connected to the lifting slide seat, and the contraction and expansion assembly is fixedly installed below the lifting slide seat.

[0008] Further, the contraction and expansion assembly comprises a rectangular bracket connected to the lifting slide seat at the top end, an optical axis guide rail transversely penetrating the rectangular bracket, a plurality of sliding seats slidingly installed on the optical axis guide rail and connected to the adsorption assembly, and a telescopic driving unit arranged in the rectangular bracket. The telescopic driving unit can make the sliding seats contract or expand along the optical axis guide rail, so that the interval between the sliding seats is adapted to the interval of the seeds.

[0009] Further, the telescopic driving unit comprises a slide rail vertically arranged on the inner side wall of the rectangular bracket, a sliding plate slidingly installed in the slide rail, a telescopic cylinder fixedly installed above the rectangular bracket and capable of driving the sliding plate to move up and down in the slide rail, a guide inclined slot opened in the sliding plate and corresponding to the sliding seats, and a sliding guide block clamped in the guide inclined slot; the distance between adjacent guide inclined slots gradually increases from top to bottom.

[0010] Further, the adsorption assembly comprises an adsorption tube fixedly installed on the sliding seat, a gas source interface arranged on one side of the adsorption tube and in communication with a negative pressure gas source, and a valve assembly for controlling the on-off of the gas source interface, and the bottom of the adsorption tube is provided with an elastic adsorption nozzle; the inside of the adsorption tube is provided with a flow guide port, which is arranged below the gas source interface. The valve assembly is arranged in an outer shell at the top of the adsorption tube, a magnetic core is arranged above the inner wall of the outer shell, and an electromagnetic coil is sleeved on the magnetic core; the bottom of the magnetic core is connected to a sliding block, the bottom of the sliding block is connected to a valve rod, the bottom end of the valve rod extends above the flow guide port and is fixedly installed with a valve core, and the size of the valve core is adapted to the flow guide port; the bottom end of the valve core is fixedly installed with a ejector pin, which can make the seed smoothly separate from the adsorption tube, and the bottom end of the ejector pin extends downward into the inside of the elastic adsorption nozzle. The upper end of the valve rod is sleeved with a return spring abutting against the bottom surface of the sliding block.

[0011] Beneficial effects: compared with the prior art, the present application has the following remarkable advantages: (1) the distance between the same column of seeds can be adjusted according to the seed type and shape and size, so as to prevent interference between adjacent seeds; the interval of the adsorption assembly can be flexibly adjusted through the contraction and expansion assembly, so as to ensure that each adsorption tube can adsorb the corresponding seed, adapt to seeds of different sizes and different placement intervals, and have strong versatility; (2) multiple seeds are placed on the conveying belt at the same time, through the cooperation of various mechanisms, the seeds can be continuously transported, vitality detected and graded and sorted at a fast pace, so as to realize batch processing; (3) the elastic adsorption nozzle cooperates with the thimble structure, which not only ensures firm adsorption, but also ensures that the seed can smoothly separate from the adsorption tube, so that the assembly line operation is more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a side structure schematic diagram of the present application;

[0013] Figure 2 is a front structure schematic diagram of the present application;

[0014] Figure 3 is a partial enlarged schematic diagram of A in the present application Figure 1 .

[0015] Figure 4 is a partial enlarged schematic diagram of B in the present application Figure 2 .

[0016] Figure 5 is a structure schematic diagram of the negative pressure adsorption mechanism in the present application;

[0017] Figure 6 is a structure schematic diagram of the telescopic driving unit in the present application;

[0018] Figure 7 is a sectional view of the adsorption tube at C in the present application Figure 5 . DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be further described below in combination with the drawings.

[0020] As Figure 1 , Figure 2As shown, the present application provides a kind of seed vigor detection and grading integrated equipment, including operation platform 1, conveying belt 2, spectrum detector 3, negative pressure adsorption mechanism 4, displacement mechanism 5 and controller 6.Operation platform 1 provides installation reference for other mechanism, conveying belt 2 is horizontally arranged on the top of operation platform 1, for continuous conveying seed to be detected.Conveying belt 2 surface is equipped with grid line equally divided along width direction, auxiliary positioning seed placement position and interval, ensure the precision correspondence of detection and separation, in addition to this positioning method, other ways can also be used to realize auxiliary positioning.When seed is wheat seed this kind of seed with relatively small volume, one grid can correspond one seed;When seed is corn seed this kind of seed with relatively large volume, interval grid can be placed, ensure that adjacent seeds do not interfere with each other during detection and grading, improve separation accuracy.Controller 6 controls contraction and expansion assembly 42 movement according to seed placement interval, so that the interval of adsorption assembly 41 is adapted to seed interval.

[0021] Spectrum detector 3 is connected across conveying belt 2, and its detection probe is directed to the surface of conveying belt 2, for real-time acquisition of seed spectrum data, separation of seeds into viable seeds and non-viable seeds, and transmission to controller 6.Controller 6 can realize man-machine interaction, built-in spectrum analysis algorithm, determine whether the seed has vitality by comparing the seed spectrum with the standard vitality threshold, and mark the position coordinates of the non-viable seed.The detected and graded seeds are continuously conveyed by conveying belt 2, and when the seeds are conveyed under negative pressure adsorption mechanism 4, displacement mechanism 5 drives negative pressure adsorption mechanism 4 to translate downward, so that negative pressure adsorption mechanism 4 is aligned above conveying belt 2, the valve assembly in the adsorption assembly 41 corresponding to the non-viable seed is turned on, the non-viable seed is adsorbed and conveyed to the outside of conveying belt 2.A storage tank 7 is arranged below conveying belt 2 and below negative pressure adsorption mechanism 4, respectively for collecting viable seeds and non-viable seeds.

[0022] As shown in Figures 1-3 Displacement mechanism 5 is used to drive negative pressure adsorption mechanism 4 to translate and lift, so that negative pressure adsorption mechanism 4 is just located above conveying belt 2.A reverse U-shaped support frame 51 is horizontally arranged above conveying belt 2, and the two support feet of the support frame are fixed on the table top of operation platform 1.A guide rail 52 is horizontally arranged along support frame 51, a translation slide 53 is slidingly installed on guide rail 52, a motor 54 is fixed on the end of support frame 51, and the output shaft of the motor is connected with translation slide 53 through a lead screw or a synchronous belt, to drive translation slide to reciprocatingly translate along guide rail 52.A lifting slide 55 is slidingly connected to the front side of translation slide 53, and a lifting drive cylinder 56 is installed on the top of translation slide 53, with its telescopic end fixedly connected with lifting slide 55 vertically downward, to drive lifting slide to lift along vertical direction.

[0023] When sorting, first, the translation slide 53 is driven by the motor 54 to move along the guide rail 52 to the direction of the conveying belt 2, so that the translation slide 53 drives the lifting slide 55 and the negative pressure suction mechanism 4 to move to the directly above of the conveying belt 2, and at this time, each suction assembly in the negative pressure suction mechanism 4 is located directly above the corresponding seed respectively, then the lifting driving cylinder 56 drives the lifting slide and the suction assembly to move downward, so that the suction assembly adsorbs and fixes the detected inactivity seed, then the lifting driving cylinder 56 drives the lifting slide 55 and the suction assembly to move upward to reset, so that the suction assembly removes the adsorbed inactivity seed from the surface of the conveying belt 2, and then the motor 54 drives the translation slide 53 to move along the guide rail 52 to the outside of the conveying belt 2, moves the suction assembly and the adsorbed inactivity seed to the outside of the conveying belt 2.

[0024] As Figures 4-7As shown, the negative pressure suction mechanism 4 includes a suction assembly 41 and a contraction and expansion assembly 42 for precisely sucking and separating the non-viable seeds. The contraction and expansion assembly 42 is fixedly installed below the lifting slide 55 and is used to adjust the spacing of the suction assembly 41 to adapt to the placement spacing of the seeds on the conveying belt 2. The specific structure of the contraction and expansion assembly is that the top end of the rectangular support 421 is fixedly connected with the lifting slide 55, the optical axis guide rail 422 transversely penetrates through the rectangular support 421 and extends in the horizontal direction, a plurality of sliding seats 423 are slidingly sleeved on the optical axis guide rail 422, one suction assembly 41 is correspondingly connected below each sliding seat 423, a positioning sleeve 438 is fixedly installed on the front side of the sliding seat, and the suction assembly is fixedly installed in the corresponding positioning sleeve. A telescopic driving unit is arranged in the rectangular support 421 and includes a sliding rail 424, a sliding plate 425, a telescopic cylinder 426, a guide inclined groove 427 and a sliding guide block 428. The sliding rail 424 is vertically arranged on the inner side wall of the rectangular support 421, and the sliding plate 425 is slidingly embedded in the sliding rail 424. The telescopic cylinder 426 is fixedly arranged above the rectangular support, the telescopic end of the telescopic cylinder is connected with the top of the sliding plate 425, and the sliding plate is driven to move up and down along the sliding rail. The guide inclined groove 427 is arranged on the sliding plate in one-to-one correspondence with the sliding seat 423, and the sliding guide block 428 is fixedly connected with the sliding seat at one end and is clamped in the guide inclined groove at the other end. The distance between adjacent guide inclined grooves gradually increases from top to bottom, and when the sliding plate moves up and down, the guide inclined groove drives the sliding seat to contract or expand along the optical axis guide rail through the sliding guide block, so that the spacing of the suction assembly is consistent with the placement spacing of the seeds. When it is necessary to adjust and increase the distance between adjacent suction assemblies according to the arrangement of the seeds, the sliding plate 425 is driven to slide upward along the sliding rail 424 by the telescopic cylinder 426, at this time the sliding guide block 428 moves downward relative to the guide inclined groove 427 on the sliding plate, so that the sliding guide block is outwardly abutted and expanded by the guide inclined groove arranged outwardly from top to bottom, and then the sliding guide block drives the corresponding sliding seat 423 and the suction assembly to outwardly expand along the optical axis guide rail 422, so as to adjust and increase the distance between adjacent suction assemblies, so that the distance between the suction assemblies is the same as the distance between the seeds, so that the suction assembly can correspond to the corresponding seeds when it moves downward. Correspondingly, when it is necessary to adjust and reduce the distance between adjacent suction assemblies according to the arrangement of the seeds, the sliding plate 425 is driven to slide downward along the sliding rail 424 by the telescopic cylinder 426.

[0025] The adsorption assembly 41 is used to absorb inactive seeds. The adsorption tube 411 is vertically fixed below the sliding seat 423, and has an elastic adsorption nozzle 414 at the bottom. The elastic adsorption nozzle is made of silicone, which can conform to the seed surface and avoid damaging the seed. Different sizes of elastic adsorption nozzles can be replaced according to the size of the seed to prevent the seed from being accidentally sucked into the air source interface 412 due to size mismatch. The air source interface 412 is located on one side of the adsorption tube 411 and is connected to an external negative pressure air source through an air pipe. The valve assembly is located in the outer shell 431 at the top of the adsorption tube 411 and is used to control the opening and closing of the air source interface 412. It specifically includes a magnetic core 432, an electromagnetic coil, a slider 433, a valve stem 434, a valve core 435, and a return spring 436. The magnetic core 432 is fixed to the upper part of the inner wall of the outer casing, and the electromagnetic coil is sleeved on the outside of the magnetic core. The slider 433 is connected to the bottom of the magnetic core, and the valve stem 434 extends vertically through the slider and downwards, with the valve core 435 fixedly installed at the bottom. The size of the valve core is adapted to the guide port 413 inside the adsorption tube. The reset spring 436 is sleeved on the upper end of the valve stem 434 and abuts against and supports the bottom surface of the slider to achieve the reset and sealing of the valve core. The ejector pin 437 is fixedly installed at the bottom end of the valve core 435 and extends downwards into the interior of the elastic adsorption nozzle 414. When the valve assembly closes the negative pressure, the ejector pin can push the seed out of the adsorption nozzle, ensuring that the seed detaches smoothly.

[0026] The negative pressure air source is an air pump, which is connected to the air source interface 412. It can continuously provide negative pressure suction to the adsorption tube 411. When the adsorption tube moves downward to the surface of the conveyor belt 2 under the drive of the displacement mechanism 5, the elastic adsorption nozzle 414 abuts against the top surface of the corresponding seed. At this time, if the seed is a non-viable seed that needs to be separated, the valve assembly on the adsorption tube is opened, the electromagnetic coil is not energized, and the slider 433 moves upward under the support force of the return spring 436, thereby driving the valve stem 434 and the valve core 435 upward, so that the valve core separates from the guide port. At this time, the guide port is in the open state, so that the air source interface and the elastic adsorption nozzle are in the conductive state. At this time, the elastic adsorption nozzle can adsorb and fix the seed through negative pressure to facilitate the subsequent conveying and separation of non-viable seeds. If the seeds are viable, the valve assembly closes, the electromagnetic coil is energized to generate a magnetic field, and the electromagnetic coil drives the central magnetic core downward through the electromagnetic field. This causes the magnetic core 432 to drive the slider 433, valve stem, and valve core to move downward synchronously, opening the valve assembly. The valve core then seals the guide port, isolating the air source interface from the elastic adsorption nozzle, preventing the elastic adsorption nozzle from being affected by the negative pressure inside the adsorption tube and thus preventing the adsorption and fixation of the seeds. The displacement mechanism 5 moves the negative pressure adsorption mechanism 4 above the storage box 7. When inactive seeds need to be placed into the storage box, the controller controls the previously unenergized electromagnetic coil to become energized. The reset spring 436 pushes the valve core 435 downward to close the guide port, allowing the previously adsorbed inactive seeds to fall downward under their own gravity. At this time, the bottom end of the ejector pin 437 pushes against the top of the seed to assist in separating the seed from the elastic adsorption nozzle, preventing the seed from adhering to the elastic adsorption nozzle and ensuring smooth seed detachment. The conveyor belt 2 continuously transports the seeds, repeating the above detection and separation steps to achieve continuous automated operation of seed viability detection and grading.

Claims

1. A seed vigor detection and grading integrated device, comprising an operating table (1), a conveyor belt (2) disposed on the operating table for transporting seeds, and a spectrometer (3) bridging the conveyor belt (2) for detecting seed vigor, characterized in that, It also includes a negative pressure adsorption mechanism (4) set on the operating table (1) for separating inactive seeds from the conveyor belt (2), a displacement mechanism (5) that can drive the negative pressure adsorption mechanism (4) to move horizontally and vertically, and a controller (6) set on the operating table (1) and electrically connected to each mechanism. The negative pressure adsorption mechanism (4) includes multiple vertically arranged adsorption components (41) and a shrinking and expanding component (42) that adjusts the spacing of the adsorption components (41) according to the seed placement spacing on the conveyor belt (2). The adsorption components (41) are used to correspondingly absorb inactive seeds on the conveyor belt.

2. The integrated seed vigor detection and grading device according to claim 1, characterized in that, Storage boxes (7) are provided below the conveyor belt (2) and below the negative pressure adsorption mechanism (4).

3. The integrated seed vigor detection and grading device according to claim 1, characterized in that, The surface of the conveyor belt (2) is provided with grid lines that are equally spaced along the width. The grid lines are used to help position the seeds on the conveyor belt (2) and at intervals.

4. The integrated seed vigor detection and grading device according to claim 1, characterized in that, The displacement mechanism (5) includes an inverted U-shaped support frame (51) that spans across the conveyor belt (2), a guide rail (52) that runs along the support frame, a translation slide (53) that slides on the guide rail (52), a motor (54) that is mounted on the support frame and drives the translation slide (53), a lifting slide (55) that is mounted on one side of the translation slide (53), and a lifting drive cylinder (56) that is mounted on the top of the translation slide (53) and whose telescopic end is connected to the lifting slide (55). The contraction and expansion assembly (42) is fixedly mounted below the lifting slide (55).

5. The integrated seed vigor detection and grading device according to claim 1, characterized in that, The shrinking and expanding assembly (42) includes a rectangular bracket (421) connected to the top of the lifting slide (55), an optical axis guide rail (422) that runs horizontally through the rectangular bracket, a plurality of sliding seats (423) that are slidably mounted on the optical axis guide rail and connected to the adsorption assembly (41), and a telescopic drive unit located in the rectangular bracket (421). The telescopic drive unit can cause the sliding seats (423) to shrink and close or expand and unfold along the optical axis guide rail (422), so that the interval between the sliding seats is adapted to the seed placement interval.

6. The integrated seed vigor detection and grading device according to claim 5, characterized in that, The telescopic drive unit includes a slide rail (424) vertically mounted on the inner wall of a rectangular support, a slide plate (425) slidably mounted in the slide rail (424), a telescopic cylinder (426) fixedly mounted above the rectangular support (421) and capable of driving the slide plate to move up and down in the slide rail, and guide grooves (427) opened on the slide plate (425) and corresponding one-to-one with the sliding seat (423). The sliding guide block (428) is engaged in the guide groove (427); the distance between adjacent guide grooves (427) gradually increases from top to bottom.

7. The integrated seed vigor detection and grading device according to claim 1, characterized in that, The adsorption assembly (41) includes an adsorption tube (411) fixedly installed on a sliding seat (423), a gas source interface (412) located on one side of the adsorption tube (411) and connected to a negative pressure gas source, and a valve assembly for controlling the opening and closing of the gas source interface (412). The adsorption tube (411) is provided with a flow guide (413) inside, which is located below the gas source interface (413).

8. The integrated seed vigor detection and grading device according to claim 7, characterized in that, The valve assembly is located inside the outer shell (431) at the top of the adsorption tube (411). A magnetic core (432) is provided on the upper part of the inner wall of the outer shell (431), and an electromagnetic coil is sleeved on the magnetic core. The bottom of the magnetic core (432) is connected to the slider (433), and the bottom of the slider (433) is connected to the valve stem (434). The bottom end of the valve stem (434) extends to the top of the guide port (413) and a valve core (435) is fixedly installed. The size of the valve core (435) is adapted to the guide port (413). The upper end of the valve stem (434) is sleeved with a return spring (436) that abuts against and supports the bottom surface of the slider.

9. The integrated seed vigor detection and grading device according to claim 7, characterized in that, The bottom of the adsorption tube (411) is provided with an elastic adsorption nozzle (414).

10. The integrated seed vigor detection and grading device according to claim 8, characterized in that, The bottom end of the valve core (435) is fixedly installed with a pin (437) that allows the seeds to be easily removed from the adsorption tube, and the bottom end of the pin extends downward into the interior of the elastic adsorption nozzle (414).

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