An ultrasonic levitation chilli seed sower and method

Abstract

The application discloses an ultrasonic suspended chilli seed sowing device and method, and relates to the technical field of sowing. The device comprises a reset device, a launching device and a seed separating and suspending device. The output end of the reset device is connected with the launching device, and the output end of the launching device is communicated with the seed separating and suspending device. The reset device is used for pushing the launching device to work and resetting the launching device. The launching device is used for launching the seeds to the seed separating and suspending device. The seed separating and suspending device makes the seeds suspended by the acoustic suspension force, and then makes the seeds continuously and individually sowed along the seed outlet pipe under the action of gravity. According to the ultrasonic suspension principle, the chilli seeds are captured by the ultrasonic suspension device after being launched at a certain initial speed. The chilli seeds are suspended on the standing wave node formed by the transducer. The duty cycle of the PWM wave is changed, so that the seeds move along the axial direction, and finally, the seeds are discharged from the seed outlet pipe. The device can realize the seed sowing in a continuous and individual seed manner, and the sowing efficiency and the seed utilization rate are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sowing, in particular to an ultrasonic suspension chilli seed sower and method. BACKGROUND

[0002] Chilli is a vegetable used in daily life and a seasoning necessary for cooking at home. The planting area of chilli is also gradually expanding. The planting and sowing technology of chilli seeds becomes one of the key problems. Since the chilli seeds are very hot, they will cause physical discomfort to the sower, and the chilli seeds are of different sizes and shapes, so it is difficult to evenly and stably control the quantity of chilli seed sowing during sowing, causing unnecessary waste. Although the existing sowing machinery can reduce labor, it needs manual assistance and is inconvenient to operate. Therefore, there is an urgent need for a chilli seed sower to realize quantitative, efficient and labor-saving sowing, thereby reducing the sowing cost. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides an ultrasonic suspension chilli seed sower which utilizes the principle of ultrasonic suspension. After the chilli seeds are launched at a certain initial speed, they will be captured by the ultrasonic suspension device. The chilli seeds are suspended on the standing wave node formed by the transducer. The duty cycle of the PWM wave is changed to make the seeds move along the axial direction. Finally, the seeds are discharged from the seed discharge pipe. The device can realize continuous single seed discharge, improving the sowing efficiency and seed utilization rate.

[0004] The present application achieves the above technical purpose through the following technical means.

[0005] An ultrasonic suspension chilli seed sower includes a reset device, a launching device and a seed separation suspension device. The output end of the reset device is connected to the launching device. The output end of the launching device is communicated with the seed separation suspension device. The reset device is used to push the launching device to work and reset the launching device. The launching device is used to launch the seeds to the seed separation suspension device. The seed separation suspension device makes the seeds suspended by acoustic suspension force and then makes the seeds continuously sowed in single grain along the seed discharge pipe under the action of gravity.

[0006] In the above scheme, the power source of the reset device is gas. The reset device includes a reset spring, a piston rod and a cylinder wall. One end of the piston rod is provided with a buffer piston, and the other end extends out of the cylinder rear cover to the launching device. A limiting spring is sleeved on the piston rod, one end of the limiting spring is close to a first buffer pad, and the first buffer pad is arranged on the piston rod and close to the cylinder rear cover.

[0007] In the scheme, the transmitting device comprises a seed inlet, a seed storage bin, a clamping module and a limiting module; the seed storage bin is arranged in a tubular track, a hole is formed above the tubular track, the hole is communicated with the seed inlet; the clamping module is arranged near the hole; the clamping module is symmetrically arranged above and below; the seed storage bin is a conical opening structure towards the seed distribution suspension device, and the conical opening structure is clamped by the clamping module at the initial position; the seed storage bin is pushed to move along the tubular track by a piston rod in the reset device; the limiting module is arranged at the outlet end of the tubular track, and the limiting module is used to move the seed storage bin to the seed distribution suspension device.

[0008] In the scheme, a photoelectric sensor is further arranged in the seed storage bin, and the photoelectric sensor is used to detect the seed quantity in the seed storage bin.

[0009] In the scheme, the conical opening structure is hinged to the seed storage bin; the conical opening structure comprises a clamping plate and a shell; the shell is arranged outside the clamping plate; the clamping plate and the shell are connected by a first spring and a connecting rod mechanism; the clamping plate and the shell are both two-piece type and symmetrically arranged with the tubular track axis as the center.

[0010] In the scheme, the limiting module comprises a third spring and a second buffer pad; one end of the third spring is arranged on the tubular track, and the other end is arranged on the second buffer pad, wherein the second buffer pad is perpendicular to the tubular track; a hole is formed in the center of the second buffer pad.

[0011] In the scheme, the clamping module comprises a second spring, a movable clamping core and a clamping shell; the clamping shell is a U-shaped hollow structure, the second spring is arranged in the clamping shell, the movable clamping core is arranged in the clamping shell and connected to one end of the second spring, and under the action of elastic restoring force, the movable clamping core can move along the inner wall of the clamping shell to clamp the conical opening structure.

[0012] In the scheme, the seed distribution suspension device comprises a transducer, a concave spherical shell, a control board, a driving board, a seed outlet pipe and an adjustable stabilized power supply; the concave spherical shell is connected by a connecting plate at both ends; a horizontal seed inlet is formed in the concave spherical shell, and the horizontal seed inlet is matched with the pipeline track port; a plurality of transducers are uniformly distributed in the concave spherical shell; the seed outlet pipe is arranged on the connecting plate; the transducers are connected with the driving board through wires; the plurality of transducers are connected in parallel; the driving board is connected with the adjustable stabilized power supply; the control board controls the adjustable stabilized power supply, so that the adjustable stabilized power supply generates and outputs a 40KHz PWM wave.

[0013] In the scheme, the radius of the concave spherical shell is 50mm, the distance between the vertices of the two concave spherical shells is 138mm, and the concave spherical curvature radius is 60mm.

[0014] The method comprises the following steps: the seeds enter the seed storage bin through the seed inlet, when the photoelectric sensor detects that the seeds enter the seed storage bin, the compressed air of the air pump is discharged from the electromagnetic valve to push the seed storage bin to move rightward, the shell at the outlet end of the seed storage bin is opened, the seeds are emitted through the transverse seed inlet of the concave spherical shell at a certain initial speed, two groups of ultrasonic beams generated by the transducer array meet and superimpose to form a standing wave, the seeds are affected by the sound pressure radiation at the standing wave node, the acoustic suspension force is generated to make the seeds suspended at the wave node position, the seeds are captured by different standing wave nodes due to different initial speeds when the seeds are emitted, and the seeds are axially moved by changing the PWM wave duty cycle of the transducer; when the seeds reach the right half of the concave spherical shell, the seeds cannot be suspended due to insufficient acoustic suspension force caused by the decrease of the sound pressure, and the seeds are discharged along the seed outlet pipe under the action of gravity, so that the continuous single-seed sowing is realized, and the seed storage bin is clamped by the clamping module again to realize the reset under the action of the reset spring.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The concave spherical surface focuses more concentratedly than the plane design, so that the acoustic suspension force provided is larger. The acoustic field energy generated by the double emission end is larger than that of the single emission end, and the acoustic suspension force is larger. The duty cycle of the PWM wave in the controller is accurately controlled, so that the standing wave node is controlled, and the suspension and movement of the seeds in the axial position are realized.

[0017] 2. The seed storage bin is emitted from the clamping module and reaches the limiting device, and can be quickly reset under the action of the air cylinder. Moreover, the outlet end of the seed storage bin is tightly closed under the clamping of the clamping module with appropriate force, and then the seed storage bin is separated from the clamping module under the action of the air cylinder, the internal clamping plate of the seed storage bin is quickly opened, and the chili seeds obtain the initial speed to enter the seed separation and suspension device.

[0018] 3. Since the chili seeds are very small, the device can realize the continuous sowing of single seeds, can fully utilize the number of chili seeds, and can uniformly distribute the chili seeds in the planting area, so that the over-concentration and waste are avoided. Moreover, the sowing efficiency is improved under the combined action of the emission device, the reset device and the suspension device, the manual operation is reduced, and the accuracy and uniformity of sowing are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the ultrasonic suspension chili seed sower.

[0020] Figure 2 It is a schematic diagram of the structure of the reset device.

[0021] Figure 3 It is a schematic diagram of the structure of the emission device.

[0022] Figure 4Structure diagram of seed sorting suspension device;

[0023] Figure 5 Structure diagram of seed storage bin;

[0024] Figure 6 Structure diagram of clamping module;

[0025] Figure 7 Axial standing wave pressure distribution diagram;

[0026] Figure 8 Schematic diagram of seed under the action of acoustic levitation force Figure 1 ;

[0027] Figure 9 Schematic diagram of seed under the action of acoustic levitation force Figure 2 ;

[0028] Figure 10 Schematic diagram of seed storage bin under the action of air pump.

[0029] The reference signs are as follows:

[0030] 1-seed inlet; 2-photoelectric sensor; 3-first buffer pad; 4-reset spring; 5-guide ring; 6-first air pipe joint; 7-sealing pad; 8-cylinder end cover; 9-piston rod; 10-cylinder wall; 11-solenoid valve; 12-air pump; 13-air pressure sensor; 14-connection frame; 15-seed storage bin; 1501-first spring; 1502-linkage mechanism; 1503-clamping plate; 1504-housing; 16-transducer; 17-concave spherical housing; 18-control board; 19-driving board; 20-seed outlet pipe; 21-adjusting screw; 22-buffer piston; 23-sealing piston; 24-clamping module; 2401-second spring; 2402-movable clamping core; 2403-clamping shell; 25-limiting module; 2501-third spring; 2502-second buffer pad; 26-adjustable stabilized power supply; 30-tubular track; 31-transverse seed inlet. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] An ultrasonic suspended chilli seed sower comprises a reset device, a launching device and a seed separating and suspending device. The reset device comprises a reset spring 4, a first buffer pad 3, a cylinder wall 10, a sealing piston 23, a buffer piston 22, a guide ring 5, a cylinder end cover 8, an adjusting screw 21, a piston rod 9 and a first air pipe joint 6. The piston rod 9 is located inside the cylinder wall 10, one end of which is provided with the first buffer pad 3 and extends out of the cylinder rear end cover to be connected to a seed storage bin 15, and the other end is connected with the buffer piston 22. The sealing piston 23 is provided with the buffer piston 22 at both ends, and a sealing pad 7 is installed between the sealing piston 23 and the piston rod 9. The cylinder wall 10 is provided with the first air pipe joint 6 at one end. The reset spring 4 is sleeved on the piston rod 9 and located between the first buffer pad 3 and the buffer piston 22. The guide ring 5 is arranged between the sealing piston 23 and the cylinder wall 10. The guide ring 5 is used for guiding and positioning the piston rod 9. The cylinder end face 8, the cylinder rear end cover and the cylinder wall 10 form a sealing structure. The gas is introduced into the sealing structure through the first air pipe joint 6, and the gas is generated by a gas pump 12.

[0035] The launching device includes an electromagnetic valve 11, an air pump 12, a photoelectric sensor 2, a seed inlet 1 and an air pressure sensor 13. The electromagnetic valve 11 is connected with the air pump 12, the seed inlet 1 is in the shape of a circular truncated cone, the seed inlet 1 is arranged above a tubular track 30, a seed storage bin 15 is arranged in the tubular track 30, the photoelectric sensor 2 is arranged in the seed storage bin 15, the photoelectric sensor 2 is connected with a control board 18, a limiting module 25 is arranged around the shell 1504 at the outlet end of the seed storage bin 15, and is used for limiting axial displacement. The air pump 12 is provided with the air pressure sensor 13 at the bottom.

[0036] The seed storage bin 15 is arranged in the tubular track 30, a hole is formed above the tubular track 30, the hole is communicated with the seed inlet 1; the seed storage bin 15 is in a conical opening structure towards the seed separation and suspension device, the conical opening structure is clamped by a clamping module 24 at the initial position; the seed storage bin 15 is pushed to move along the tubular track 30 by a piston rod 9 in a reset device; a limiting module 25 is arranged at the outlet end of the tubular track 30, and is used for moving the seed storage bin 15 to the seed separation and suspension device; the conical opening structure is hinged on the seed storage bin 15; the conical opening structure includes a clamping plate 1503 and a shell 1504; the shell 1504 is arranged outside the clamping plate 1503; the clamping plate 1503 and the shell 1504 are connected through a first spring 1501 and a connecting rod mechanism 1502; the clamping plate 1503 and the shell 1504 are both two-piece type and are symmetrically arranged with the tubular track 30 as the center axis.

[0037] The clamping plate 1503 and the shell 1504 are designed in a two-piece type, at the initial position, the clamping plate 1503 and the shell 1504 are matched with each other through clamping by the clamping module 24, after leaving the initial position, the restoring force of the first spring 1501 between the clamping plate 1503 and the shell 1504 makes the clamping plate 1503 and the shell 1504 separate, and the connecting rod mechanism 1502 inside is used for limiting to prevent excessive separation.

[0038] The seed separation and suspension device includes a concave spherical shell 17, a transducer 16, a connecting frame 14, a driving board 19 and a control board 18. The number of the transducer 16 is 72, the transducer 16 array is fixed on the inner surfaces of two concave spherical shells 17 in a ring shape, the two concave spherical shells 17 are fixed through the connecting frame 14, the driving board 19 and the control board 18 are arranged at one end of the concave spherical shell 17, and are connected in parallel with the transducer 16 array through wires to form a passage.

[0039] The driving plate 19 is built-in driving module, the driving module is L298N, and is connected with the transducer 16 array by wire. The output PWM wave with the same amplitude as the adjustable voltage stabilizer 26 is given to the transducer 16 array. The control board (ATMEGA328P) is externally connected with the adjustable voltage stabilizer 26, generates and outputs 40KHz PWM wave, the radius of the concave spherical shell is 50mm, the distance between the two concave spherical shell vertexes is 138mm, and the concave spherical curvature radius is 60mm.

[0040] The limiting device includes a third spring 2501 and a second buffer pad 2502, which are installed at the outlet of the tubular track 30. One end of the third spring 2501 is connected with the tubular track 30, and the other end is connected with the second buffer pad 2502. The second buffer pad 2502 is perpendicular to the tubular track 30, and a hole is formed in the center of the second buffer pad 2502. The hole is used to pass through the shell 1504 at the end of the seed storage bin 15, and simultaneously plays a buffering role.

[0041] The clamping module is two, wherein the clamping module 24 includes a second spring 2401, a clamping shell 2403 and a movable clamping core 2402; the clamping shell 2403 is a U-shaped hollow structure, the second spring 2401 is arranged in the clamping shell 2403, and the movable clamping core 2402 is arranged in the clamping shell 2403 and connected to one end of the second spring 2401. Under the action of the elastic restoring force, the movable clamping core 2402 can move along the inner wall of the clamping shell 2403 to clamp the shell 1504 at the end of the seed storage bin 15.

[0042] The sound pressure p generated by the nth transducer at the point r n , which can be expressed as

[0043] P0 is the amplitude constant of the transducer output power; A is the amplitude of the excitation signal; k is the wave number, k = 2π / λ, λ is the wavelength; d n is the distance from the transducer to the point r; is the phase of the emission source; D f is the far-field directivity function with respect to the angle θ. Then the superimposed sound field pressure generated by N transducers is

[0044] When the air pressure sensor 13 detects that the air pump pressure is 0.01Pa, the air pump provides a force of 1μN to the piston, so that the seed generates an acceleration of 12.5cm / s 2 , and the pepper seeds are discharged at an initial speed of 5cm / s-7cm / s.

[0045] The weight of the pepper seeds is 0.045g-0.056g. Since the sound pressure generated by the concave spherical array is large in the middle and small at both ends, the maximum sound pressure is 44.8kPa and the minimum sound pressure is 5kPa at 35mm-105mm. According to the formula , wherein prms p is the measured sound pressure ref p0 is the reference sound pressure, 2 x 10 -5 Pa. The maximum sound pressure level is 187 dB, and the minimum sound pressure level is 168 dB, according to the formula where U is the acoustic potential energy. The maximum acoustic levitation force is 642 μN, and the minimum acoustic levitation force is 423 μN, so when the pepper seeds are suspended to the right concave spherical surface, the pepper seeds will sink into the seed outlet pipe 20 due to the gravity being greater than the levitation force.

[0046] The first spring 1501 and the connecting rod mechanism 1502 are arranged between the housing of the outlet end of the seed storage bin 15 and the internal clamping plate 1503. When the seed storage bin 15 is at the starting point position, the first spring 1501 is compressed by the clamping module 24, and the clamping plate 1503 is closed. When the seed storage bin 15 is at the end position, the first spring 1501 is restored to its original length by the limiting module 25, and the clamping plate 1503 is opened.

[0047] The upper end of the seed outlet pipe 20 is in the shape of a horn, and the lower end is in the shape of a cylinder, and is fixed to the right side of the connecting frame.

[0048] The first air pipe joint 6 is arranged on the right side of the first buffer pad 3, and is connected to the electromagnetic valve 11, and the electromagnetic valve 11 is connected to the air pump 12.

[0049] The adjustable voltage stabilizing power supply 26 provides an amplification power source for the driving module, and the excitation voltage is 20 V.

[0050] The application will be further described in combination with the drawings:

[0051] The application will be further described in combination with the drawings: Figure 1 The ultrasonic levitation pepper seed sower shown in the drawings comprises a reset device, a launching device, and a seed separation and levitation device. The reset device comprises a reset spring 4, a first buffer pad 3, a cylinder wall 10, a sealing piston 23, a buffer piston 22, a guide ring 5, a cylinder end cover 8, an adjusting screw 21, a piston rod 9, and a first air pipe joint 6. The launching device comprises the first air pipe joint 6, an electromagnetic valve 11, an air pump 12, a photoelectric sensor 2, a seed inlet 1, and an air pressure sensor 13. The seed separation and levitation device comprises a concave spherical housing 17, a transducer 16, a connecting frame 14, a driving plate 19, and a control plate 18.

[0052] The application will be further described in combination with the drawings: Figure 2As shown, the piston rod 9 is located inside the cylinder wall 10, one end is provided with the first buffer pad 3, the other end is connected with the buffer piston 22, reducing the impact force of the piston on the cylinder end cover 8. The sealing piston 23 is provided with the buffer piston 22 at both ends, and the first gas pipe joint 6 is opened at one end of the cylinder wall 10. The sealing pad 7 is installed between the sealing piston 23 and the piston rod 9, which ensures the air tightness of the cylinder. The reset spring 4 is sleeved on the piston rod 9, and is located between the first buffer pad 3 and the buffer piston 22. The guide ring 5 is arranged between the sealing piston 23 and the cylinder wall 10, which ensures that the cylinder wall 10 is not damaged by the piston rod 9. The adjusting screw 21 is arranged at one end of the cylinder end cover 8.

[0053] Combined with the Figure 3 As shown, the electromagnetic valve 11 is connected with the air pump 12, the seed inlet 1 is circular table shape, the seed storage bin 15 is installed below the seed inlet 1, the photoelectric sensor 2 is arranged inside the seed storage bin 15, the limiting module 25 is installed around the shell 1504 of the outlet end of the seed storage bin 15, which is used to limit the axial displacement. The air pressure sensor 13 is installed at the bottom of the air pump 12.

[0054] Combined with the Figure 4 As shown, the number of transducers 16 is 72, the transducer 16 array is fixed on the inner surface of the two concave spherical shells 17 in a ring arrangement, the two concave spherical shells 17 are fixed through the connecting frame 14, the drive board 19 and the control board 18 are arranged at one end of the concave spherical shell 17, and are connected in parallel with the transducer 16 array through wires to form a passage. The drive module 19 is L298N, which is connected with the transducer 16 array through wires, and outputs the same amplitude PWM wave as the adjustable voltage stabilizer 26 to the transducer 16 array. The control module (ATMEGA328P) is externally connected with the adjustable voltage stabilizer 26, generates and outputs 40KHz PWM wave, the radius of the concave spherical surface is 50mm, the distance between the two concave spherical apexes is 138mm, and the curvature radius of the concave spherical surface is 60mm.

[0055] Combined with the Figure 5 As shown, the first spring 1501 and the connecting rod mechanism 1502 are arranged between the shell of the seed storage bin outlet end and the internal clamping plate, and the first spring 1501 is in compression state when the clamping module 24 clamps the outlet end shell.

[0056] Combined with the Figure 6 As shown, the second spring 2401 is arranged in the clamping shell 2403 in the clamping module, the lower end of the second spring 2401 is connected with the movable clamping core 2402, and a gap is formed between the movable clamping core 2402 and the inner wall of the clamping shell 2403.

[0057] Combined with the Figure 7 As shown, the standing wave sound field when the radius of the concave spherical array is 50mm, the standing wave sound pressure is high in the middle and low on both sides, that is, the suspension ability is strong in the middle and weak on both sides.

[0058] Fig. 1 shows the schematic diagram of the ultrasonic suspended pepper seed planter according to the embodiment of the present application. Figure 8 9 As shown in Fig. 1, the acoustic suspension force is directed from high pressure to low pressure, and the standing wave is formed in the continuous alternation of high and low pressure, so the acoustic suspension force in the longitudinal direction is the resultant force against gravity, and the lateral force is equal in size and opposite in direction, so that the pepper seeds are suspended. At 35mm-105mm, the maximum acoustic pressure is 44.8kPa, the minimum acoustic pressure is 5kPa, the maximum acoustic pressure level is 187dB, the minimum acoustic pressure level is 168dB, the maximum acoustic suspension force is 642μN, and the minimum acoustic suspension force is 423μN.

[0059] Fig. 2 shows the schematic diagram of the ultrasonic suspended pepper seed planter according to the embodiment of the present application. Figure 10 As shown in Fig. 2, the seed storage bin 15 is clamped by the clamping module 24 at the starting point position, and the spring a1501 is compressed and the clamping plate 1503 is closed. At the end position, the spring a1501 is restored to its original length and the clamping plate 1503 is opened.

[0060] The working process of the ultrasonic suspended pepper seed planter according to the embodiment of the present application is as follows:

[0061] The pepper seeds enter the seed storage bin 15 through the seed inlet 1, and the photoelectric sensor 2 detects the entering of the pepper seeds into the seed storage bin 15 and sends out a signal. The compressed air of the air pump 12 is discharged from the electromagnetic valve 11 to push the seed storage bin 15 to move forward at high speed. The shell 1504 at the outlet end of the seed storage bin 15 is opened, the pepper seeds are launched through the through hole of the concave spherical shell 17 into the seed distribution and suspension device, and the two groups of ultrasonic beams generated by the transducer 16 array meet and superimpose to form a standing wave. The pepper seeds are affected by the acoustic pressure radiation at the standing wave node, and the acoustic suspension force is generated to make the pepper seeds suspended at the wave node position against the gravity. Since the pepper seeds are launched at different initial speeds, they are captured by different standing wave nodes, and the PWM wave duty cycle of the transducer 16 is changed to make the pepper seeds move axially. When the seeds reach the right half of the concave spherical shell, the acoustic pressure is reduced and cannot provide enough acoustic suspension force to make the seeds suspended, and the seeds are discharged along the seed outlet pipe 20 under the action of gravity, realizing continuous single-seed planting. At the same time, the seed storage bin 15 is clamped by the clamping module 24 again under the action of the air cylinder and the return spring 4 to realize resetting.

[0062] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] ​Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the spirit and scope of the present application.

Claims

1. An ultrasonic levitating chilli seed planter characterized in that, The device comprises a reset device, a launching device and a seed separating and suspending device, the output end of the reset device is connected with the launching device, the output end of the launching device is communicated with the seed separating and suspending device; the reset device is used to push the launching device to work and reset the launching device, the launching device is used to launch the seeds to the seed separating and suspending device, the seed separating and suspending device makes the seeds suspended by the acoustic suspending force and then makes the seeds continuously single-seed sowed along the seed outlet pipe (20) under the action of gravity; the seed separating and suspending device comprises a transducer (16), a concave spherical shell (17), a control board (18), a driving board (19), a seed outlet pipe (20) and an adjustable stabilized power supply (26); the two ends of the concave spherical shell (17) are connected through a connecting plate (14); wherein, the concave spherical shell (17) is provided with a transverse seed inlet (31) at the upper portion, the transverse seed inlet (31) is matched with the port of a tubular track (30); the concave spherical shell (17) is uniformly provided with a plurality of transducers (16); the connecting plate (14) is provided with the seed outlet pipe (20); the transducer (16) is connected with the driving board (19) through a wire; the plurality of transducers (16) are connected in parallel; the driving board (19) is connected with the adjustable stabilized power supply (26); the control board (18) controls the adjustable stabilized power supply (26) to generate and output a certain hertz of PWM wave.

2. The ultrasonic levitating chilli seed planter according to claim 1, wherein, The power source of the reset device is gas, the reset device comprises a reset spring (4), a piston rod (9) and a cylinder wall (10); one end of the piston rod (9) is provided with a buffer piston (22), the other end extends out of the cylinder rear cover into the launching device; the piston rod (9) is sleeved with the reset spring (4), one end of the reset spring (4) is close to a first buffer pad (3), the first buffer pad (3) is arranged on the piston rod (9) and close to the cylinder rear cover.

3. The ultrasonically levitated pepper seed planter of claim 1, wherein, The launching device comprises a seed inlet (1), a seed storage bin (15), a clamping module (24) and a limiting module (25); the seed storage bin (15) is arranged in the tubular track (30), a hole is formed above the tubular track (30) and communicated with the seed inlet (1); the clamping module (24) is arranged near the hole; the clamping module (24) is symmetrically arranged above and below; the end of the seed storage bin (15) facing the seed separating and suspending device is a conical opening structure, in the initial position, the conical opening structure is clamped by the clamping module (24); the seed storage bin (15) is pushed to move along the tubular track (30) by the piston rod (9) in the reset device; the limiting module (25) is arranged at the outlet end of the tubular track (30), the limiting module (25) is used to limit the movement of the seed storage bin (15) to the seed separating and suspending device.

4. The ultrasonically levitated pepper seed planter of claim 3, wherein, The seed storage bin (15) is further provided with a photoelectric sensor (2), the photoelectric sensor (2) is used to detect the amount of seeds in the seed storage bin (15).

5. The ultrasonically levitated pepper seed planter of claim 3, wherein, The conical opening structure is hinged on the seed storage bin (15); the conical opening structure comprises a clamping plate (1503) and a shell (1504); the shell (1504) is arranged outside the clamping plate (1503); the clamping plate (1503) and the shell (1504) are connected through a first spring (1501) and a connecting rod mechanism (1502); the clamping plate (1503) and the shell (1504) are both two-piece symmetrical about the axis of the tubular track (30).

6. The ultrasonically levitated pepper seed planter of claim 3, wherein, The limiting module (25) comprises a third spring (2501) and a second buffer pad (2502); one end of the third spring (2501) is arranged on the tubular track (30), and the other end is arranged on the second buffer pad (2502), wherein the second buffer pad (2502) is perpendicular to the tubular track (30); a hole is formed in the center of the second buffer pad (2502).

7. The ultrasonically levitated pepper seed planter of claim 3, wherein, The clamping module (24) comprises a second spring (2401), a movable clamping core (2402) and a clamping shell (2403); the clamping shell (2403) is a U-shaped hollow structure, the second spring (2401) is arranged in the clamping shell (2403), and the movable clamping core (2402) is arranged in the clamping shell (2403) and connected to one end of the second spring (2401); under the action of the elastic force, the movable clamping core (2402) can move along the inner wall of the clamping shell (2403) to clamp the conical opening structure.

8. The ultrasonically levitating pepper seed broadcaster of claim 1, wherein, The radius of the concave spherical shell (17) is 50 mm, the distance between the vertices of the two concave spherical shells (17) is 138 mm, and the concave spherical curvature radius is 60 mm.

9. The method of claim 1 to 8, wherein, The seeds enter the seed storage bin (15) through the seed inlet (1), and when the photoelectric sensor (2) detects that the seeds enter the seed storage bin (15), a signal is transmitted, and the compressed air of the air pump (12) is discharged from the electromagnetic valve (11) to push the seed storage bin (15) to move rightward at high speed, the shell (1504) at the outlet end of the seed storage bin (15) is opened, the seeds are emitted through the transverse seed inlet (31) of the concave spherical shell (17) at a certain initial speed, two groups of ultrasonic beams generated by the transducer (16) array meet and superimpose to form a standing wave, the seeds are subjected to the action of acoustic radiation at the standing wave node, acoustic suspension force is generated, the seeds are suspended at the wave node position by overcoming the action of gravity, and due to different initial speeds of the seeds during emission, the seeds are captured by different standing wave nodes, and the PWM wave duty cycle of the transducer is changed to enable the seeds to move axially; when the seeds reach the right half concave spherical shell (17), the acoustic pressure is reduced and cannot provide sufficient acoustic suspension force to suspend the seeds, and the seeds are discharged along the seed outlet pipe (20) under the action of gravity, thereby realizing continuous single-seed seeding, and the seed storage bin (15) is clamped by the clamping module (24) again under the action of the reset spring (4) to realize resetting.

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