Lightweight pneumatic-assisted drilling unmanned aerial vehicle

Abstract

The invention discloses a lightweight pneumatic-assisted drilling unmanned aerial vehicle, which belongs to the technical field of agricultural aviation and comprises an unmanned aerial vehicle main body, the unmanned aerial vehicle main body comprises a rack, a head mounted at the head of the rack and a tail mounted at the tail of the rack, a material box is arranged on the rack, a discharging mechanism is arranged in the material box, and a drilling guide mechanism is arranged below the material box; the discharging mechanism comprises a discharging roller arranged in the material box, a roller motor used for driving the discharging roller to rotate is arranged on the outer side of the material box, and a plurality of sets of array type material holes are formed in the surface of the discharging roller at equal intervals. According to the invention, the distribution uniformity of different materials among a plurality of sowing pipelines is ensured, the accurate dynamic control of the discharging speed is realized, independent negative pressure suction and pneumatic acceleration are carried out on each sowing pipeline through the micro air pump, the sowing effect and the adaptability to different materials and working environments are improved, and the sowing efficiency is improved. Rapid full-automatic folding and unfolding of the drill seeding device are achieved, and the convenience and safety of taking-off, landing, transportation and storage of the unmanned aerial vehicle are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural aviation technology, and in particular to a lightweight pneumatically assisted seeding drone. Background Art

[0002] In modern precision agriculture, drones, with their high efficiency and flexibility, have shown great potential in drill seeding operations and are gaining increasing popularity. Currently, most drone-based drill seeding systems utilize pneumatic conveying, using airflow generated by a fan to transport agricultural materials such as seeds or fertilizer from a feed bin to a discharge port and spread them along a predetermined path. However, existing drone-based pneumatic drill seeding systems still face numerous challenges and technical bottlenecks in practical application:

[0003] Complex Structure: To ensure adequate material transport capacity, traditional pneumatic seeding systems often require high-power, large-scale centrifugal or axial fans, supplemented by complex converging and diverging air duct structures. This results in a bulky and heavy seeding system, increasing the flight load of the drone, limiting its payload, and placing higher demands on the drone platform, hindering the trend towards miniaturization and lightweighting.

[0004] Low energy efficiency: To overcome resistance in multi-channel, long-distance pipelines and ensure smooth material transport within complex flow paths, existing drill seeding systems often require fans to operate continuously at high power, resulting in high overall system energy consumption. This high energy consumption directly reduces the drone's single-operation endurance and the area it can cover per unit time, significantly impacting overall operational efficiency and economic efficiency.

[0005] Inadequate discharge accuracy and uniformity: Existing drill seeding systems, such as the common open-groove design, struggle to ensure precise, consistent, and stable discharge rates across each drill pipe when handling materials with varying physical properties. Furthermore, existing drill seeding systems generally lack real-time, closed-loop feedback control of the discharge process, leading to significant deviations between actual discharge rates and preset target values. This makes it difficult to achieve truly precise, variable-rate operation, impacting crop growth uniformity, resource utilization efficiency, and ultimately yield.

[0006] Poor drill performance and environmental adaptability: Most existing pneumatic drill systems rely on a relatively constant or only roughly adjustable overall airflow generated by a fan to transport and spread materials. This single or fixed airflow pattern is difficult to precisely adapt to the characteristics of materials of varying types, sizes, and weights. It also cannot effectively cope with external environmental interference, such as the complex downwash generated by drone rotors during flight. This can easily lead to problems such as uneven material distribution along the drill path, inconsistent soil penetration depth, increased drift losses, and unstable seeding width, directly impacting drill quality and crop survival rates.

[0007] Therefore, developing a UAV seeding device with a lightweight structure, low energy consumption, precise and uniform material discharge, controllable seeding effect and strong adaptability is of great significance to promoting the development of precision agricultural aviation technology. Summary of the Invention

[0008] The object of the present invention is to provide a lightweight pneumatically assisted seeding drone to solve the problems raised in the above-mentioned background technology.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a lightweight pneumatic-assisted seeding drone, comprising a drone body, the drone body comprising a frame, a head mounted on the head of the frame, and a tail mounted on the rear of the frame, a material box being provided on the frame, a material discharge mechanism being provided in the material box, and a seeding guide mechanism being provided below the material box;

[0010] The discharge mechanism includes a discharge roller arranged in the material box, a roller motor for driving the discharge roller to rotate is provided on the outside of the material box, and a plurality of array-type material holes are opened on the surface of the discharge roller at equal intervals;

[0011] A plurality of partitions are provided above and below the discharge drum at equal intervals, and the partitions divide the array-type material holes into equal intervals. A scraper tangent to the discharge drum is provided on one side of the discharge drum. The upper partition and the lower partition cooperate with the scraper to divide the interior of the material box into a guided feeding area with equal intervals above the discharge drum and a guided discharging area with equal intervals below the discharge drum.

[0012] The strip sowing guide mechanism includes a plurality of strip sowing pipes extending into the guided material discharging area and corresponding to the guided material discharging area one by one. The main body of the drone is provided with an adjustment mechanism for folding or unfolding the plurality of strip sowing pipes.

[0013] The tail ends of the plurality of groups of seeding pipes are each connected to a micro air pump.

[0014] In a further embodiment, a plurality of weighing sensors are provided at the connection between the material box and the frame, and the weighing sensors are used to monitor the total weight change of the material in the material box in real time and continuously. The main body of the drone is provided with a spreading control unit electrically connected to the weighing sensors, and the spreading control unit has a built-in control algorithm with preset parameters for different materials;

[0015] When the operation starts, the sowing control unit dynamically adjusts the speed of the drum motor through closed-loop control based on the real-time material consumption rate fed back by the weighing sensor, combined with the current flight speed of the drone body and the preset sowing amount per unit area.

[0016] In a further embodiment, the strip sowing pipeline includes an upper feed part, a lower discharge part and a hose connected to the feed part and the discharge part, a feed port is provided at the top of the feed part, the feed port is located in the corresponding guided discharge area, and a discharge port is provided at the bottom of the discharge part.

[0017] In a further embodiment, the inner diameter of the feed portion located in the feed port area is thickened, and the hose is an enhanced flexible bellows with a smooth inner wall.

[0018] In a further embodiment, the micro air pump is provided with an outlet connected to the atmosphere, the micro air pump is provided with an air inlet, the air inlet is provided with a short air inlet pipe, the short air inlet pipe is connected to the feed part of the corresponding sowing pipe, and a high-density filter is provided in the short air inlet pipe at the connection position with the feed part.

[0019] In a further embodiment, the adjustment mechanism includes a connecting rod motor provided at the bottom of the tail, a plurality of groups of the sowing pipes are connected by a fixing plate, a connecting rod is provided on the fixing plate, and an output end of the connecting rod motor is connected to one end of the connecting rod;

[0020] The connecting rod motor drives the connecting rod to rise or fall, so that the hose can be extended or bent.

[0021] In a further embodiment, a drum flange is provided at one end of the discharge drum, and the output end of the drum motor is connected to the drum flange.

[0022] In a further embodiment, a tank cover is provided on the top of the tank.

[0023] In a further embodiment, the nose is integrated with a flight control module and a remote communication module, and the tail is integrated with a high-precision RTK positioning module and an inertial navigation unit.

[0024] In a further embodiment, a battery compartment is provided on the frame, and a lithium battery pack is accommodated in the battery compartment.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The structural combination and coordinated operation of the array-type discharge drum, partitions, and scrapers ensures uniform distribution of different materials across multiple seeding pipes. Combined with real-time weight data feedback from the weighing sensor, a closed-loop control system for the drum motor speed is established, achieving precise dynamic control of the discharge speed.

[0027] 2. A micro air pump provides independent negative pressure suction and pneumatic acceleration for each sowing pipe, replacing the traditional bulky, energy-intensive centralized high-power blower. The power of each micro air pump can be independently and finely adjusted via a PWM signal, enabling personalized and precise control of airflow parameters and material ejection parameters within each sowing pipe, significantly improving sowing results and adaptability to different materials and operating environments.

[0028] 3. The sowing strip pipeline adopts a structure with a specially designed flexible bending section, and cooperates with a connecting rod mechanism driven by a connecting rod motor to achieve rapid and fully automatic folding and unfolding of the sowing strip device, greatly improving the convenience and safety of drone take-off and landing, transportation, and storage. At the same time, it ensures the smooth transportation of materials during operation through the flexible bending section, taking into account both functionality and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is an overall bottom view of the present invention;

[0031] Figure 3 This is a schematic diagram of the present invention's drill pipe in a folded state;

[0032] Figure 4 This is a schematic diagram of the installation structure of the material box and the discharge roller of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the discharge drum of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the drill pipe of the present invention;

[0035] Figure 7 It is a schematic structural diagram of a micro air pump of the present invention;

[0036] The figures are marked as: tail 1, connecting rod 2, strip sowing pipe 3, fixing plate 4, micro air pump 5, drum motor 6, frame 7, head 8, weighing sensor 9, material box 10, material box cover 11, lithium battery pack 12, connecting rod motor 13, discharge drum 14, array material hole 15, partition 16, scraper 17, drum flange 18, feed port 19, hose 20, discharge port 21, high-density filter 22, air inlet short pipe 23, air inlet 24, air outlet 25. DETAILED DESCRIPTION

[0037] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0038] See also Figure 1-Figure 7 The present invention provides a technical solution: a lightweight pneumatic-assisted seeding drone, including a drone body, the drone body including a frame 7, a nose 8 mounted on the head of the frame 7, and a tail 1 mounted on the rear of the frame 7, wherein the frame 7 is precision-machined from aviation-grade aluminum alloy and provides structural support for the entire drone system, a material box 10 is provided on the frame 7, a material discharge mechanism is provided in the material box 10, and a seeding guide mechanism is provided below the material box 10;

[0039] The discharge mechanism includes a discharge roller 14 disposed in the material box 10. A roller motor 6 is provided outside the material box 10 for driving the discharge roller 14 to rotate. A plurality of array-type material holes 15 are formed on the surface of the discharge roller 14 at equal intervals.

[0040] A plurality of partitions 16 are evenly spaced above and below the discharge drum 14. The partitions 16 divide the array-type material holes 15 into equal intervals. A scraper 17 tangential to the discharge drum 14 is provided on one side of the discharge drum 14. The upper partition 16 and the lower partition 16 cooperate with the scraper 17 to divide the interior of the material box 10 into a guided feeding area with equal spacing above the discharge drum 14 and a guided discharging area with equal spacing below the discharge drum 14.

[0041] The strip sowing guide mechanism includes a plurality of strip sowing pipes 3 extending into the guided material discharging area and corresponding to the guided material discharging area one by one. The main body of the drone is provided with an adjustment mechanism for folding or unfolding the plurality of strip sowing pipes 3.

[0042] The tail ends of the plurality of groups of seeding pipes 3 are each connected to a micro air pump 5 .

[0043] Through the above technical solution, the partition 16 divides the interior of the material box 10 into multiple independent guided feeding areas and guided discharging areas corresponding to the respective sowing pipes 3 below. The material in the material box 10 enters the guided feeding area and then enters the guided discharging area through the discharge roller 14, ensuring that the material can be evenly and independently guided to the corresponding segmented area of the discharge roller 14 under the action of gravity, avoiding the lateral flow and uneven accumulation of the material in the material box 10. Interference with the discharge amount of each channel, the aperture, depth and arrangement density of the array-type material holes 15 have been targeted and optimized. It is compatible with materials with different physical properties within a certain range, and the scraper 17 maintains micro-pressure contact with the surface of the discharge drum 14. During the rotation of the discharge drum 14, it ensures that each array-type material hole 15 is uniformly filled with material, and accurately scrapes off excess material exceeding the volume of the material hole. Through the effective separation of the partition 16, the quantitative material extraction of the array-type material hole 15 and the precise scraping of the scraper 17, it ensures that even if there are differences in fluidity and density of the materials, the discharge amount in each operating section of the discharge drum 14 is almost the same, thereby ensuring that the amount of material delivered to each sowing pipe 3 is highly consistent.

[0044] In a further embodiment, a plurality of weighing sensors 9 are provided at the connection between the material box 10 and the frame 7. The weighing sensors 9 are used to monitor the total weight change of the material in the material box 10 in real time and continuously. The main body of the drone is provided with a spreading control unit electrically connected to the weighing sensors 9. The spreading control unit has a built-in control algorithm for preset parameters for different materials.

[0045] When the operation starts, the sowing control unit dynamically adjusts the speed of the drum motor 6 through closed-loop control based on the real-time material consumption rate fed back by the weighing sensor 9, combined with the current flight speed of the drone body and the preset sowing amount per unit area.

[0046] Through the above technical solution, the dynamic speed regulation mechanism based on real-time weight feedback ensures accurate discharge speed control and precise control of the total amount for different material characteristics, thereby effectively realizing precise row seeding.

[0047] In a further embodiment, the sowing pipe 3 includes an upper feed part, a lower discharge part and a hose 20 connected to the feed part and the discharge part. A feed port 19 is provided at the top of the feed part, and the feed port 19 is located in the corresponding guided discharge area. A discharge port 21 is provided at the bottom of the discharge part.

[0048] Through the above technical solution, the material released from the guided discharge area is guided through the strip sowing pipe 3.

[0049] In a further embodiment, the inner diameter of the feed portion in the area of the feed port 19 is thickened, and the hose 20 is a reinforced flexible bellows with a smooth inner wall.

[0050] Through the above technical solution, the inner diameter of the feed port 19 is thickened to form a small buffer and diversion area, ensuring that the material falling from the material box 10 can smoothly enter the sowing pipe 3, effectively preventing possible blockage in the initial feeding stage. The reinforced flexible corrugated pipe with a smooth inner wall can realize its expansion and contraction and bending functions without affecting the sowing operation effect;

[0051] The inner wall of the flexible bellows is made of a smooth material with a low friction coefficient, and the resistance is small when the material passes through. Its corrugated structure enables it to perform axial expansion and contraction and large-angle bending within a certain range. The bending radius can meet the folding requirements without producing dead bends. Even at a large bending angle, the effective flow cross-sectional area of the pipeline will not be significantly reduced, avoiding the formation of bottlenecks that may cause material accumulation or blockage.

[0052] In a further embodiment, the micro air pump 5 is provided with an air outlet 25 connected to the atmosphere, the micro air pump 5 is provided with an air inlet 24, the air inlet 24 is provided with an air inlet short pipe 23, the air inlet short pipe 23 is connected to the feed part of the corresponding sowing pipe 3, and a high-density filter screen 22 is provided in the air inlet short pipe 23 at the connection position with the feed part.

[0053] Through the above technical solution, when working, after each independently controlled micro air pump 5 is started, a controllable negative pressure field is established at its air inlet 2 and the connected sowing pipe 3. The negative pressure field can quickly suck the material released from the guided discharge area into the main channel of the sowing pipe 3, and continuously apply aerodynamic drag to the material during the downward transportation of the material along the sowing pipe 3, so that it obtains significant secondary acceleration in the sowing pipe 3. Therefore, when the material leaves the discharge port 21, it has a higher initial outlet velocity, thereby enhancing its ability to resist external interference such as the downwash wind field of the drone and natural side wind, which can effectively reduce material drift and improve landing accuracy. In addition, the higher initial velocity can also enable the material to overcome soil resistance and achieve a more ideal soil penetration depth, thereby optimizing the seed germination environment or the root zone effectiveness of the fertilizer, and comprehensively improving the effect of the sowing operation. Through the setting of the high-density filter 22, it can effectively prevent material particles, dust and field impurities from being sucked into the micro air pump 5 with the air flow, thereby avoiding wear, blockage or failure of the micro air pump 5 and ensuring the long-term stable operation of the system.

[0054] Through the drone's row sowing control unit, the driving voltage of each micro air pump 5 can be adjusted independently, in real time, and with high precision based on pulse width modulation technology. The autonomous control algorithm can dynamically adjust the negative pressure intensity, air flow rate, and material ejection speed and angle in each row sowing pipe 3 according to real-time operation requirements and sensor feedback, thereby achieving personalized and optimized control of row sowing uniformity and operation results.

[0055] In a further embodiment, the adjustment mechanism includes a connecting rod motor 13 provided at the bottom of the tail 1, a plurality of sets of sowing pipes 3 are connected by a fixing plate 4, a connecting rod 2 is provided on the fixing plate 4, and an output end of the connecting rod motor 13 is connected to one end of the connecting rod 2;

[0056] The connecting rod motor 13 drives the connecting rod 2 to rise or fall, so that the hose 20 can be extended or bent.

[0057] Through the above technical solution, the connecting rod 2 is driven by the connecting rod motor 13, so that the bending degree of the hose 20 can be accurately controlled, thereby fine-tuning the sowing angle of the discharge port 21 to adapt to different crops, working heights or wind field conditions. In a non-working environment, this flexible section allows the entire sowing pipe 3 unit to bend upward and retract above the landing gear, greatly reducing the overall outline size of the UAV, facilitating ground preparation before takeoff, recovery after landing, and daily transportation and storage of the UAV.

[0058] In a further embodiment, a drum flange 18 is provided at one end of the discharge drum 14 , and the output end of the drum motor 6 is connected to the drum flange 18 .

[0059] Through the above technical solution, the drum motor 6 drives the drum flange 18 to rotate, thereby driving the discharge drum 14 to rotate.

[0060] In a further embodiment, a tank cover 11 is provided on the top of the tank 10 .

[0061] Through the above technical solution, the material in the material box 10 can be stored conveniently through the material box cover 11.

[0062] In a further embodiment, the nose 8 is integrated with a flight control module and a remote communication module, and the tail 1 is integrated with a high-precision RTK positioning module and an inertial navigation unit.

[0063] Through the above technical solution, the flight control module and the remote communication module are responsible for the UAV's trajectory planning, flight parameter control and data interaction, and the high-precision RTK positioning module and inertial navigation unit are used to achieve precise positioning and flight attitude monitoring of the UAV.

[0064] In a further embodiment, a battery compartment is provided on the frame 7 , and a lithium battery pack 12 is accommodated in the battery compartment.

[0065] Through the above technical solution, the rationally distributed battery compartments can accommodate two sets of quickly pluggable large-capacity lithium battery packs 12. Through the lightweight design of the entire machine and the optimization of the power consumption of the row sowing system, when the drone is fully loaded, it can still ensure 30 minutes of effective operation endurance, providing a reliable energy guarantee for efficient field operations.

[0066] In a further embodiment, the drill seeding drone comprises the following steps when in operation:

[0067] S1. Pre-takeoff Preparation and System Initialization: The operator plans the operating area and sowing parameters, such as the target sowing rate, material type parameters, flight speed, and route, using the ground station software. The operator then removes the hopper lid 11, loads the material to be sown into the hopper 10, installs the lithium battery pack 12, and starts the drone. The system then performs a self-test, including checks of various sensors, such as the load cell 9, the attitude sensor, the actuators (the motors and air pump), and the communication link. At this point, the sowing pipe 3 is automatically folded and retracted, controlled by the connecting rod 2 and the connecting rod motor 13, to facilitate ground operations and takeoff.

[0068] S2. Drill seeding preparation: The drone autonomously takes off according to the planned route and, using the RTK differential positioning system, navigates to the starting point of the route in the designated operating area and reaches the preset operating altitude. Upon reaching the designated position, the drill seeding control system controls the connecting rod motor 13 according to the operating instructions to precisely rotate the connecting rod 2, synchronously unfolding the multiple folded drill seeding pipes 3 downward to the preset operating angle, so that the discharge port 21 points to the target seeding area, completing the drill seeding preparation.

[0069] S3. Operation of the precision discharging system: The UAV begins to fly at a constant speed along the predetermined route. The sowing control system calculates the target discharging rate based on the current flight speed, the preset sowing amount per unit area, and the calibrated material characteristic parameters, and starts the drum motor 6 to drive the discharging drum 14 to rotate. The material in the material box 10 enters the array material holes 15 of the discharging drum 14 under the guidance of gravity and the uniform distribution of the partition 16. As the discharging drum 14 rotates, the material is accurately scraped and leveled by the scraper 17, and then falls from the bottom outlet of the material box 10 and enters the corresponding feed port 19 of the sowing pipe 3. During the discharging process, the weighing sensor 9 monitors the total weight change of the material in the material box 10 at a high frequency and feeds this weight data stream back to the sowing control system in real time. The real-time material consumption rate is compared with the target instantaneous discharging rate through the PID-based adaptive control algorithm, and the PWM drive signal of the drum motor 6 is dynamically adjusted to accurately correct the motor speed to ensure that the actual discharging amount is consistent with the target value, realizing high-precision variable sowing and recording the total sowing amount.

[0070] S4. The pneumatically assisted seeding system works: when the discharging system starts working, the seeding control system starts all the micro air pumps 5. When each micro air pump 5 works, an adjustable negative pressure is generated in the corresponding seeding pipe 3. This negative pressure actively sucks the material discharged from the bottom of the material box 10 into the seeding pipe 3 and significantly accelerates it in the pipe. The material is finally ejected from the discharge port 21 at high speed and in a direction with high kinetic energy, forming a concentrated material flow with a certain soil penetration ability and a strong ability to resist wind field interference, ensuring that the material can be injected into the desired soil depth. When seeding is working, the working power of each micro air pump 5 can be independently and finely adjusted through the PWM signal according to different operation requirements and real-time operation effect feedback, so as to realize real-time optimization and differentiated adjustment of the negative pressure intensity and airflow in each seeding pipe 3. For example, the airflow of the edge pipe can be appropriately enhanced to counteract the influence of stronger downwash airflow, thereby ensuring the uniformity and consistency of seeding in all seeding strips;

[0071] S5. End of operation: After the row seeding operation is completed, the sowing control system automatically stops the discharge roller motor 6 and all micro air pumps 5, and the UAV autonomously flies to the preset safe return point. Before landing, the connecting rod motor 13 drives the connecting rod 2 again to retract all the row seeding pipes 3 upward to a compact folded state. Then the UAV lands smoothly and safely. The operator turns off the power and exports the operation log, which contains data such as the sowing area, amount, trajectory, etc., to complete this row seeding operation.

[0072] The preferred specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A lightweight pneumatically assisted seeding drone, comprising a drone body, wherein the drone body comprises a frame (7), a nose (8) mounted on the head of the frame (7), and a tail (1) mounted on the tail of the frame (7), characterized in that: A material box (10) is provided on the frame (7), a material discharge mechanism is provided in the material box (10), and a strip-seeding and guiding mechanism is provided below the material box (10); The discharge mechanism comprises a discharge roller (14) arranged in the material box (10), a roller motor (6) for driving the discharge roller (14) to rotate is provided on the outside of the material box (10), and a plurality of array-type material holes (15) are formed on the surface of the discharge roller (14) at equal intervals; A plurality of partitions (16) are provided at equal intervals above and below the discharge roller (14), and the partitions (16) divide the array-type material holes (15) at equal intervals. A scraper (17) tangential to the discharge roller (14) is provided on one side of the discharge roller (14). The upper partition (16) and the lower partition (16) cooperate with the scraper (17) to divide the interior of the material box (10) into a guided feeding area with equal intervals above the discharge roller (14) and a guided discharging area with equal intervals below the discharge roller (14); The strip sowing guide mechanism comprises a plurality of strip sowing pipes (3) extending into the guided material discharging area and corresponding to the guided material discharging area one by one, and the drone body is provided with an adjustment mechanism for folding or unfolding the plurality of strip sowing pipes (3); The tail ends of the plurality of groups of sowing pipes (3) are each connected to a corresponding micro air pump (5).

2. A lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: A plurality of weighing sensors (9) are provided at the connection between the material box (10) and the frame (7), and the weighing sensors (9) are used to monitor the total weight change of the material in the material box (10) in real time and continuously. A spreading control unit electrically connected to the weighing sensors (9) is provided on the main body of the drone, and the spreading control unit has a built-in control algorithm for preset parameters of different materials; When the operation starts, the spreading control unit dynamically adjusts the rotation speed of the drum motor (6) through closed-loop control based on the real-time material consumption rate fed back by the weighing sensor (9), combined with the current flight speed of the drone body and the preset spreading amount per unit area.

3. The lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: The sowing pipe (3) comprises an upper feed portion, a lower discharge portion, and a hose (20) connected to the feed portion and the discharge portion. A feed port (19) is provided at the top end of the feed portion, and the feed port (19) is located in the corresponding guided discharge area. A discharge port (21) is provided at the bottom end of the discharge portion.

4. The lightweight pneumatically assisted seeding drone according to claim 3, characterized in that: The inner diameter of the feed portion is thickened in the feed port (19) area, and the hose (20) is an enhanced flexible corrugated tube with a smooth inner wall.

5. The lightweight pneumatically assisted seeding drone according to claim 3, characterized in that: The micro air pump (5) is provided with an air outlet (25) connected to the atmosphere, and the micro air pump (5) is provided with an air inlet (24). The air inlet (24) is provided with an air inlet short pipe (23). The air inlet short pipe (23) is connected to the feed part of the corresponding sowing pipe (3). A high-density filter (22) is provided in the air inlet short pipe (23) at the connection position with the feed part.

6. The lightweight pneumatically assisted seeding drone according to claim 3, characterized in that: The regulating mechanism comprises a connecting rod motor (13) provided at the bottom of the tail (1), a plurality of groups of the sowing pipes (3) are connected via a fixing plate (4), a connecting rod (2) is provided on the fixing plate (4), and an output end of the connecting rod motor (13) is connected to one end of the connecting rod (2); The connecting rod motor (13) drives the connecting rod (2) to rise or fall, so that the hose (20) can be stretched or bent.

7. The lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: One end of the discharge drum (14) is provided with a drum flange (18), and the output end of the drum motor (6) is connected to the drum flange (18).

8. The lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: A material box cover (11) is provided on the top of the material box (10).

9. The lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: The nose (8) is integrated with a flight control module and a remote communication module, and the tail (1) is integrated with a high-precision RTK positioning module and an inertial navigation unit.

10. The lightweight pneumatically assisted seeding drone according to claim 1, characterized in that: A battery compartment is provided on the frame (7), and a lithium battery pack (12) is accommodated in the battery compartment.

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