A spreader for uniform spreading and a control method thereof

Abstract

This invention discloses a uniformly spreading spreader and its control method. The spreader includes a hand-push vehicle body, a material feeding control mechanism, a spreading mechanism, and a travel speed measuring mechanism. The hand-push vehicle body is equipped with a controller and a hopper for loading materials, with a material discharge port at the bottom of the hopper. The material feeding control mechanism adjusts the material feeding rate from the discharge port. The spreading mechanism, located below the material feeding control mechanism, spreads the material discharged from the discharge port onto the ground. The travel speed measuring mechanism measures the travel speed of the hand-push vehicle body. The travel speed measuring mechanism is signal-connected to the controller, and the material feeding control mechanism is electrically connected to the controller to automatically adjust the material feeding rate based on the travel speed detected by the travel speed measuring mechanism. This invention can automatically adjust the material feeding rate according to the travel speed, thereby achieving precise spreading.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a seeder that spreads seeds evenly and its control method. Background Technology

[0002] With the rapid development of automation, the shift from manual to automated production in agricultural planting is an inevitable trend. Traditional manual sowing has many disadvantages, such as high labor costs, uneven sowing per unit area, and low sowing efficiency. Later, sowing machines gradually emerged, which can effectively improve sowing efficiency and reduce labor costs.

[0003] Most current seeding machinery is mechanical, with a typical structure being a hand-push seeder. These seeders rely on simple mechanical principles to drive the seeding box. The machine is manually pushed, and the wheels at the bottom rotate the seeding disc via gears. Simultaneously, material from the upper hopper falls into the seeding disc through the discharge port, and the disc's rotation spreads the material evenly. This type of mechanical seeder relies on ground wheels to drive the seeding box. If the ground wheels cannot rotate at a uniform speed due to friction or terrain factors, the seeding box will not spread the material evenly, significantly reducing seeding accuracy. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a uniformly spreading seeder and its control method to achieve precision spreading.

[0005] The technical solution to achieve the objective of this invention is: A uniformly spreading spreader includes a hand-push vehicle body with a controller and a hopper for loading materials, the bottom of which has a discharge port for discharging materials; The material feeding control mechanism is used to adjust the material feeding amount from the feeding port; The material spreading mechanism, located below the material feeding control mechanism, is used to spread the material discharged from the feeding port onto the ground. Walking speed measuring mechanism, used to measure the walking speed of a hand-pushed vehicle; The walking speed measuring mechanism is signal-connected to the controller, and the material feeding control mechanism is electrically connected to the controller to automatically adjust the material feeding amount according to the walking speed detected by the walking speed measuring mechanism.

[0006] Furthermore, the feeding mechanism includes a feeding disc and a feeding motor that is connected to the feeding disc and adapted to drive its rotation. The controller is electrically connected to the feeding motor to obtain the rotational speed of the feeding motor.

[0007] Furthermore, the feeding quantity control mechanism includes a feeding motor and a feeding disc that is connected to the feeding motor and is adapted to rotate under the drive of the feeding motor. The feeding disc is provided with a discharge port located on the same circumferential surface as the feeding port, and the discharge port and the feeding port form a feeding channel.

[0008] Furthermore, it also includes a stirring assembly, which includes a stirring shaft rotatably mounted on the side of the discharge port and a stirring paddle coaxially fixed on the top of the stirring shaft. The lower end of the stirring shaft passes through the hopper and is drivenly connected to the feeding motor. The discharge plate is coaxially rotatably mounted on the stirring shaft.

[0009] Furthermore, it also includes an adjustment mechanism located at the bottom of the hopper. The feeding mechanism also includes a feeding shaft. The feeding disc is coaxially fixed on the feeding shaft. The upper end of the feeding shaft is flexibly connected to the stirring shaft, and the lower end is connected to the feeding motor via a gear assembly. The feeding motor is mounted on the adjustment mechanism and is adapted to be rotatable under the drive of the adjustment mechanism to change the angle between the feeding shaft and the stirring shaft.

[0010] Furthermore, the bottom of the hopper is symmetrically provided with downwardly extending mounting plates, and the adjustment mechanism includes an adjustment motor electrically connected to the controller and an L-shaped connecting seat composed of a first base plate and a side plate. The feeding motor is fixedly mounted on the first base plate, and the two sides of the side plate are symmetrically provided with rotating shafts that rotate through the mounting plate. The output end of the adjustment motor is connected to any one of the rotating shafts to drive its rotation.

[0011] Furthermore, at least two first connecting claws are evenly provided circumferentially at the bottom of the stirring shaft, and the top of the feeding shaft or feeding disc is provided with the same number of second connecting claws as the first connecting claws. The second connecting claws are intermittently inserted into the gap between two adjacent first connecting claws to form a flexible transmission connection.

[0012] Furthermore, the bottom of the hand-push vehicle body is provided with a walking mechanism, the walking mechanism includes a rotatable ground wheel, and the walking speed measuring mechanism is an encoder installed on the ground wheel or an optical speed measuring instrument installed on the hand-push vehicle body.

[0013] Furthermore, the hand-push type vehicle body includes a hand-push frame and a front support and a rear support arranged in a cross pattern at the lower end of the hand-push frame. The top of the front support is connected to the hand-push frame, and the top of the rear support extends horizontally forward to form a mounting platform. The hopper is detachably mounted on the mounting platform. The traveling mechanism also includes a pair of support wheels with brakes. The ground wheels have a pair symmetrically arranged at the two free ends of the front support, and the two support wheels are symmetrically arranged at the two free ends of the rear support.

[0014] Furthermore, the hopper includes a second bottom plate and a baffle disposed above the second bottom plate, the baffle being foldable and having its bottom connected to the second bottom plate.

[0015] A method for controlling the spreading of a uniformly spreading spreader as described above includes the following steps: Step S1. Obtain the target seeding parameters set by the user, wherein the target seeding parameters include the target seeding density and the preset seeding width; Step S2. Obtain the average walking speed of the hand-pushed vehicle per unit time through the walking speed measuring mechanism, and send the data to the controller; Step S3. The controller obtains the discharge rate per unit time based on the average traveling speed, preset spreading width, and target spreading density. The controller calculates and outputs a control signal to control the operating state of the discharge rate control mechanism, so that the actual spreading rate matches the target spreading parameters.

[0016] Furthermore, in step S3, when the walking speed of the hand-pushed vehicle is detected to be zero, the controller controls the material feeding control mechanism to close the feeding port.

[0017] Furthermore, a spreading density model is established, and the controller controls the feeding control mechanism according to the preset spreading density model. The spreading density model satisfies the following formula: V / t = vwD Where V is the discharge volume per unit time, t is the preset unit time, v is the average travel speed of the hand-pushed vehicle per unit time, w is the preset spreading width, and D is the target spreading density, wherein the preset spreading width w is determined by the inherent parameters of the spreading mechanism.

[0018] Furthermore, the inherent parameters of the spreading mechanism include the rotational speed and angle of the spreading disc, and the position and geometric settings of the baffles on the side of the spreading disc.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The present invention optimizes the existing fully mechanical hand-push spreader into a machine consisting of three independent working mechanisms. The feeding amount control mechanism is dynamically adjusted according to the speed of the walking mechanism to achieve the adjustment of the feeding amount, thereby achieving precise spreading and improving the uniformity of spreading.

[0020] (2) The control method of the seeder of the present invention obtains the seeding area through the seeding mechanism, collects the walking speed of the walking mechanism, controls the action of the feeding motor according to the walking speed, realizes the adjustment of the feeding amount, thereby accurately controls the seeding amount and ensures that the seeding amount is not affected by the pushing speed. Attached Figure Description

[0021] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a perspective view of the seeding machine of the present invention; Figure 2 This is another perspective view of the seeding machine of the present invention; Figure 3 This is a cross-sectional structural diagram of the seeding machine of the present invention; Figure 4 This is a schematic diagram of the folded state of the hopper of the present invention; Figure 5 This is a schematic diagram of the feeding tray of the present invention; Figure 6 This is a schematic diagram of the flexible connection structure between the feeding shaft and the stirring shaft of the present invention; Figure 7 This is a schematic diagram of the feeding mechanism of the present invention.

[0022] The labels in the attached diagram are: 1. Hand-push type vehicle body, 1-1. Hand-push frame, 1-2. Front support, 1-3. Rear support, 1-4. Support assembly, 2. Material discharge control mechanism, 2-1. Material discharge plate, 2-1-1. Material discharge port, 2-2. Material discharge motor, 2-3. Friction head, 3. Material feeding mechanism, 3-1. Material feeding plate, 3-2. Material feeding motor, 3-3. Material feeding shaft, 3-3. Second connecting claw, 3-3-1. Walking mechanism, 4. Ground wheel, 4-1. Support wheel, 4-3. Drive rod, 4-4. Transmission box, 4-5. Controller, 5. Hopper, 6. Material discharge port, 6-1. Second base plate, 6-2. Enclosure, 6-3. Crease, 6-3-1. Material collection trough, 6-4. Mounting plate, 6-5. Mixing assembly, 7. Mixing shaft, 7-1. Mixing paddle, 7-2. First connecting claw, 7-1-1. Adjustment mechanism, 8. L-shaped connecting seat, 8-1. Detailed Implementation

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figures 1 to 7The spreader shown includes a hand-push trolley 1, a material feeding control mechanism 2, a spreading mechanism 3, and a traveling mechanism 4. The hand-push trolley 1 is equipped with a battery, a controller 5, and a hopper 6 for loading materials. The bottom of the hopper 6 has a discharge port 6-1. The material feeding control mechanism 2 is located below the hopper 6 and includes a feeding disc 2-1 and a feeding motor 2-2 that is drively connected to and adapted to drive the feeding disc 2-1. The feeding disc 2-1 has a discharge port 2-1-1 located on the same circumferential surface as the discharge port 6-1, forming a feeding channel with the discharge port 6-1. The spreading mechanism 3 is located below the material feeding control mechanism 2 and includes a spreading disc 3. -1 and a feeding motor 3-2 that is connected to the feeding disc 3-1 and is suitable for driving its rotation; the walking mechanism 4 is located at the bottom of the hand-push type vehicle body 1, including ground wheels 4-1 symmetrically arranged on both sides of the hand-push type vehicle body 1; the battery is electrically connected to the controller 5 to power the whole machine, the ground wheels 4-1 are signal connected to the controller, and the feeding motor 2-2 and the feeding motor 3-2 are both electrically connected to the controller 5 to automatically adjust the diameter of the feeding channel according to the rotation speed of the ground wheels and the rotation speed of the feeding disc, thereby realizing the adjustment of the spreading speed, and thus realizing precise spreading and improving the uniformity of spreading.

[0025] Specifically, the hand-push type vehicle body 1 includes a hand-push frame 1-1 and a front support 1-2 and a rear support 1-3 arranged crosswise at the lower end of the hand-push frame 1-1. The top of the front support 1-2 is detachably connected to the hand-push frame 1-1 by locking bolts. The top of the rear support 1-3 extends horizontally forward to form a mounting platform, and the hopper 6 is detachably mounted on the mounting platform by locking bolts. The front support 1-2 and the rear support 1-3 are hinged together by bolts and are detachably connected to a support assembly 1-4. The support assembly 1-4 includes a pair of limiting plates, one end of which is hinged to the front support 1-2, and the other end is bolted to the rear support 1-3, thereby forming a stable three-point support between the front and rear supports. The front support 1-2 and the rear support 1-3 are kept in a crosswise state by the support assembly 1-4. By setting the multiple components of the hand-push type vehicle body 1 to be detachably connected, the vehicle body can be divided into multiple parts for storage or transportation, saving space and reducing transportation costs.

[0026] To further save storage space, this embodiment also sets the hopper 6 as a foldable structure. Specifically, the hopper 6 includes a second base plate 6-2 and a retaining wall 6-3 disposed above the second base plate 6-2. The retaining wall can be a top-to-bottom folding structure, a sidewall folding structure, or a rotationally folding structure, with its bottom connected to the second base plate 6-2. Considering ease of storage, the retaining wall in this embodiment is preferably a top-to-bottom folding structure, such as... Figure 4As shown, the enclosure 6-3 is wider at the top and narrower at the bottom, and has several creases 6-3-1. The creases 6-3-1 are distributed along the top and bottom of the enclosure 6-3, and each crease 6-3-1 is U-shaped. By pressing down on the enclosure 6-3, the enclosure 6-3 folds over from top to bottom through the creases 6-3-1 to the second base plate 6-2, thus achieving folding. When storing, the hopper 6 can be completely folded to reduce its volume; when in use, it can be fully opened or partially folded as needed to adjust the depth of the hopper 6, making it more flexible to use.

[0027] The walking mechanism 4 also includes a pair of support wheels 4-3 with brakes. The ground wheels 4-1 are symmetrically located at the two free ends of the front support 1-2, and the two support wheels 4-3 are symmetrically located at the two free ends of the rear support 1-3, achieving four-wheel support and improving the overall stability of the machine. A drive rod 4-4, rotatably mounted near the bottom of the front support 1-2, is coaxially fixed between the two ground wheels 4-1. A transmission box 4-5, fixed to the hand-push type body 1, is rotatably mounted on the drive rod 4-4. The walking motor 4-2 is fixed to the transmission box 4-5, and its output end is connected to the drive rod 4-4 via a gear assembly or synchronous belt assembly, realizing a front-drive self-propelled spreader. In this embodiment, a gear assembly is preferred for transmission, providing high transmission accuracy and reducing slippage. The battery is a lithium battery, which serves as the power source, is lightweight, and has a longer range.

[0028] To ensure smooth material discharge, this embodiment also includes a mixing assembly 7. The mixing assembly 7 includes a mixing shaft 7-1 rotatably mounted on the side of the discharge port 6-1 and a mixing paddle 7-2 coaxially fixed to the top of the mixing shaft 7-1. The lower end of the mixing shaft 7-1 passes through the hopper 6 and is driven by the feeding motor 3-2. The feeding disc 2-1 is coaxially rotatably mounted on the mixing shaft 7-1. The feeding motor 3-2 drives the mixing assembly to rotate while driving the feeding disc, so that the spreader can stir the material in the hopper 6 in real time during spreading, preventing the discharge port 6-1 from getting blocked and ensuring that the material can be discharged more smoothly from the discharge channel.

[0029] The inner bottom of the material bin 6 is provided with a downwardly recessed material collection groove 6-4. The discharge port 6-1 is located inside the material collection groove 6-4, and the connecting surface between the material collection groove 6-4 and the side wall of the material bin 1 is inclined, so that the material can be gathered at the discharge port 6-1 for better discharge. The discharge port 6-1 includes multiple fan-shaped arc-shaped channels evenly distributed along the circumference. The arc length between adjacent fan-shaped arc-shaped channels is not less than the arc length of a single fan-shaped arc-shaped channel. The discharge port 2-1-1 has the same structure as the discharge port 6-1 and corresponds one-to-one, thereby forming multiple discharge points at the bottom, making the material drop more uniform. The discharge motor 2-2 is fixedly mounted at the bottom of the material bin 6. The output shaft is horizontally set and fixedly connected to the friction head 2-3. The bottom surface of the discharge plate 2-1 is a non-smooth surface and is in contact with the friction head 2-3. The feeding motor 2-2 drives the friction head 2-3 to rotate, which in turn drives the feeding disc 2-1 to rotate, thereby adjusting the relative position of the discharge port 2-1-1 and the feeding port 6-1, thus adjusting the diameter of the feeding channel and changing the feeding amount.

[0030] Considering that the sowing environment is generally in a relatively open field, seeds with small particles are easily affected by wind direction, leading to uneven sowing. Therefore, this embodiment adds an adjustment mechanism 8 to adjust the tilt angle of the sowing disc 3-1, allowing it to tilt at a small angle to overcome the influence of wind on sowing. Specifically, the sowing mechanism 3 also includes a sowing shaft 3-3, with the sowing disc 3-1 coaxially fixed on it. The bottom of the stirring shaft 7-1 has a pair of first connecting claws 7-1-1, and the top of the sowing shaft 3-3 has a pair of second connecting claws 3-3-1 that are adapted to the first connecting claws 7-1-1. The second connecting claws 3-3-1 are interposed in the gap between the two first connecting claws 7-1-1, forming a flexible transmission connection. The bottom of the hopper 6 is symmetrically provided with downwardly extending mounting plates 6-5. The adjustment mechanism 8 includes an adjustment motor electrically connected to the controller 5 and an L-shaped connecting seat 8-1 composed of a first base plate and side plates. The feeding motor 3-2 is fixedly mounted on the first base plate. The two sides of the side plates are symmetrically provided with rotating shafts that rotate through the mounting plate 6-5. The output end of the adjustment motor is connected to any one of the rotating shafts to drive its rotation, thereby realizing the electric adjustment of the feeding motor 3-2 mounted on the L-shaped connecting seat 8-1 at a small angle. The lower end of the feeding shaft 3-3 is connected to the feeding motor 3-2 through a gear assembly, thereby changing the angle between the feeding shaft 3-3 and the stirring shaft 7-1. Since the feeding shaft 3-3 and the stirring shaft 7-1 are flexibly connected, the two pairs of connecting claws can both realize transmission and have a certain amount of play, thereby compensating for the displacement difference generated at the connection between the two shafts when the angle of the feeding shaft 3-3 is adjusted. In other embodiments, the connecting seat 8-1 can be rotated manually, eliminating the need for an adjustment motor and reducing manufacturing costs. Only a locking structure needs to be set between the connecting seat and the mounting seat to ensure that the connecting seat remains unchanged when adjusted to a suitable angle. The structure is simple and will not be described in detail here.

[0031] The ground wheel 4-1, the spreading tray 3-1, and the unloading tray 2-1 are all equipped with encoders that are connected to the controller 5 to monitor the operating parameters of the spreader in real time. Among them, the encoder on the ground wheel 4-1 is the walking speed measuring mechanism in this embodiment. In some embodiments, an optical speed measuring instrument can also be installed on the frame to detect the moving speed relative to the ground by sending a signal to the ground and using the reflected signal.

[0032] This embodiment also provides a method for controlling the spreading of a uniformly spreading spreader as described above, including the following steps: Step S1. Obtain the target seeding parameters set by the user. The target seeding parameters include the target seeding density and the preset seeding width. Step S2. Obtain the average walking speed of the hand-pushed vehicle 1 per unit time through the walking speed measuring mechanism, and send the data to the controller 5; Step S3. Based on the average traveling speed per unit time, the preset spreading width, and the target spreading density, the controller 5 obtains the discharge rate per unit time. The controller 5 calculates and outputs a control signal to control the operating state of the discharge rate control mechanism 2, so that the actual spreading rate matches the target spreading parameters. When the traveling speed of the hand-push cart is detected to be zero, the controller controls the discharge rate control mechanism to close the discharge port.

[0033] Specifically, a spreading density model is established, and controller 5 controls the feeding quantity control mechanism 2 according to the preset spreading density model. The spreading density model satisfies the following formula. V / t = vwD Where V is the discharge volume per unit time, t is the preset unit time, v is the average travel speed of the hand-push vehicle 1 per unit time, w is the preset spreading width, and D is the target spreading density. The preset spreading width w is determined by the inherent parameters of the spreading mechanism 3. The inherent parameters of the spreading mechanism include the rotational speed and angle of the spreading disc, the position and geometric settings of the baffles on the side of the spreading disc, and the geometric settings include the shape of the baffles, the opening shape of the spray nozzle, and other mechanical structures that can affect the spreading width. For example, if other inherent parameters are fixed, and the speed of the spreading disc is constant, the spreading width is theoretically a fixed value. If the speed of the spreading disc is adjustable, such as with multiple speed settings, the spreading width can also be obtained according to the rotational speed of each speed setting.

[0034] The encoder collects the real-time rotation speed of the ground wheel and sends the signal to the controller. The controller then obtains the actual travel speed of the ground wheel in real time and dynamically adjusts the rotation of the feeding motor in conjunction with the spreading width to compensate for the travel speed deviation caused by changes in ground resistance. This dynamic adjustment achieves the desired seeding rate to meet the target spreading density.

[0035] This invention optimizes the existing fully mechanical hand-push spreader into a mechanism consisting of three independent working groups that are coordinated by a controller. During spreading, the spreading width is obtained in advance and the traveling speed is collected in real time to dynamically adjust the amount of material to achieve precise spreading and improve the uniformity of spreading.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seeding machine for uniform spreading, characterized in that: include A hand-push type vehicle body (1) is provided with a controller (5) and a hopper (6) for loading materials. The bottom of the hopper (6) is provided with a discharge port (6-1) for discharging materials. The material feeding control mechanism (2) is used to adjust the material feeding amount of the feeding port (6-1); The feeding mechanism (3) is located below the feeding quantity control mechanism (2) and is used to spread the material discharged from the feeding port (6-1) onto the ground. Walking speed measuring mechanism, used to measure the walking speed of the hand-pushed vehicle body (1); The walking speed measuring mechanism is connected to the controller (5) by signal, and the feeding amount control mechanism (2) is electrically connected to the controller (5) to automatically adjust the feeding amount according to the walking speed detected by the walking speed measuring mechanism.

2. The uniformly spreading seeder according to claim 1, characterized in that: The feeding mechanism (3) includes a feeding disc (3-1) and a feeding motor (3-2) that is connected to the feeding disc (3-1) and is adapted to drive the feeding disc (3-1) to rotate. The controller (5) is electrically connected to the feeding motor (3-2) to obtain the rotation speed of the feeding motor (3-2).

3. The uniformly spreading seeding machine according to claim 1, characterized in that: The bottom of the hand-push vehicle body (1) is provided with a walking mechanism (4), the walking mechanism (4) includes a rotating ground wheel (4-1), and the walking speed measuring mechanism is an encoder installed on the ground wheel (4-1) or an optical speed measuring instrument installed on the hand-push vehicle body (1).

4. The uniformly spreading seeding machine according to claim 1, characterized in that: The hand-push type vehicle body (1) includes a hand-push frame (1-1) and a front support (1-2) and a rear support (1-3) arranged in a cross configuration at the lower end of the hand-push frame (1-1). The top of the front support (1-2) is connected to the hand-push frame (1-1), and the top of the rear support (1-3) extends horizontally forward to form a mounting platform. The hopper (6) is detachably mounted on the mounting platform. The walking mechanism (4) also includes a pair of support wheels with brakes. The ground wheel (4-1) has a pair of wheels symmetrically arranged at the two free ends of the front support (1-2), and the two support wheels are symmetrically arranged at the two free ends of the rear support (1-3).

5. A uniformly spreading seeder according to claim 1, characterized in that: The hopper (6) includes a second bottom plate (6-2) and a barrier (6-3) disposed above the second bottom plate (6-2). The barrier (6-3) is foldable and its bottom is connected to the second bottom plate (6-2).

6. A method for controlling the spreading of a uniformly spreading spreader as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step S1. Obtain the target seeding parameters set by the user, wherein the target seeding parameters include the target seeding density and the preset seeding width; Step S2. Obtain the average walking speed of the hand-pushed vehicle body (1) per unit time through the walking speed measuring mechanism, and send the data to the controller (5); Step S3. The controller (5) obtains the discharge amount per unit time based on the average walking speed, preset spreading width and target spreading density per unit time. The controller (5) calculates and outputs a control signal to control the operating state of the discharge amount control mechanism (2) so that the actual spreading amount matches the target spreading parameters.

7. The seeding control method according to claim 6, characterized in that: In step S3, when the walking speed of the hand-pushed vehicle (1) is detected to be zero, the controller (5) controls the feeding quantity control mechanism to close the feeding port (6-1).

8. The seeding control method according to claim 6, characterized in that: A spreading density model is established, and the controller (5) controls the feeding amount control mechanism (2) to operate according to the preset spreading density model. The spreading density model satisfies the following formula. V / t = vwD Wherein, V is the discharge volume per unit time, t is the preset unit time, v is the average travel speed of the hand-pushed vehicle (1) per unit time, w is the preset spreading width, and D is the target spreading density, wherein the preset spreading width w is determined by the inherent parameters of the spreading mechanism (3).

9. The seeding control method according to claim 8, characterized in that: The inherent parameters of the spreading mechanism (3) include the rotation speed and angle of the spreading disc, the position and geometric settings of the baffle on the side of the spreading disc.

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