Unmanned aerial vehicle kite

Abstract

The unmanned aerial vehicle kite comprises a framework, a flexible wing surface, a plurality of rotor wing structures, an unmanned aerial vehicle body and a kite line device, the bottom of the framework is covered with the flexible wing surface, and a flexible screen is fixed to the bottom of the flexible wing surface; the rotor wing structures are uniformly arranged on the edge of the framework, the unmanned aerial vehicle body is fixedly connected with the framework and the wing surface and electrically connected with the rotor wing structures and the flexible screen, an aerovane is installed on the top of the unmanned aerial vehicle body, and the kite line device comprises a moving frame, an adjusting motor, a mobile power source, a line wheel assembly, a tensioning electric cylinder and a wireless signal controller. A rotating disc driven by an adjusting motor is rotationally arranged in the moving frame, the wire wheel assembly and the tensioning electric cylinder are arranged at the top of the rotating disc, and the wireless signal controller communicates with the unmanned aerial vehicle body. According to the invention, the unpowered lifting force of the kite is combined with the active control of the unmanned aerial vehicle, the posture is automatically adjusted according to the environmental data to obtain the optimal lifting force, air-ground cooperative closed-loop control is realized, and the cruising ability and the working efficiency are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of unmanned aerial vehicle (UAV) technology and relates to an unmanned aerial vehicle (UAV) kite. Background Technology

[0002] Unmanned aerial vehicles (UAVs) are unmanned aircraft controlled by radio remote control equipment and their own program control devices, or operated autonomously by an onboard computer, either completely or intermittently. They are generally used for agricultural planting, image acquisition, environmental data collection, and aerial performances.

[0003] Patent document CN215851931U discloses an anti-interference drone hovering device, including a drone body. A multi-mode signal receiver is provided at the top of the drone body. A diffuser is provided on the side of the drone body away from the multi-mode signal receiver. A fill light is provided inside the diffuser. A servo motor is fixedly installed on the side wall of the drone body. A propeller is installed on the output shaft of the servo motor. A connector is provided on the side wall of the diffuser. The connector is fixedly connected to the drone body. A camera is installed on the side of the connector away from the drone body.

[0004] However, the aforementioned existing technologies still have the following problems: Limited by current airborne energy technology, drones have short flight time per flight. When performing tasks that require long-term continuous operation (such as large-area image projection), the mission must be frequently interrupted, the drone must land and replace the battery or recharge. This not only significantly reduces operational efficiency and increases operational complexity, but also makes drones unsuitable for application scenarios that require ultra-long flight time or uninterrupted flight, severely restricting their technical performance and application scope. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a drone kite to solve the technical problem mentioned in the background art that existing drones have weak endurance and cannot adapt to long-term aerial photography scenarios.

[0006] The objective of this invention can be achieved through the following technical solutions: A drone kite, comprising: The skeleton is a frame structure. The flexible wing surface is laid on the bottom of the frame, and a flexible screen is fixedly installed at its bottom. Several rotor structures are evenly arranged along the edge of the frame; The main body of the drone is connected to the frame on the side wall and fixed to the wing surface at the bottom. The main body of the drone is connected to the rotor structure and flexible screen and controls its operation. A wind direction and anemometer is installed on the top of the main body of the drone. The kite line device, which is connected to the frame via the kite line, includes a moving frame, an adjusting motor, a mobile power supply, a reel assembly for reeling in and out the kite line, a tensioning cylinder, and a wireless signal controller. The mobile power supply is connected to the main body of the drone via a power supply line. A turntable is rotatably mounted inside the moving frame. The adjusting motor is fixed inside the moving frame, and its output end is connected to the bottom of the turntable. The reel assembly is slidably mounted on the top of the turntable, and one end of the kite line is wound around the reel assembly. The tensioning cylinder is fixed on the top of the turntable, and its telescopic end is connected to one end of the reel assembly. The wireless signal controller is mounted on the moving frame and is signal-connected to the adjusting motor, the tensioning cylinder, and the reel assembly, and communicates with the main body of the drone. The mobile power supply is mounted on the moving frame and is electrically connected to the adjusting motor, the tensioning cylinder, the reel assembly, and the wireless signal controller.

[0007] The main body of the drone controls the rotor structure to adjust the attitude of the drone kite to gain lift by facing the wind, based on the wind direction and wind speed data detected by the wind direction and wind speed instrument. It also controls the adjustment motor to rotate to change the direction of the reel assembly, and controls the tensioning cylinder to drive the reel assembly to slide to maintain the tension of the kite line. By combining the unpowered lift characteristics of traditional kites with the active control technology of drones, the device can maintain flight by relying on the aerodynamic lift generated by the wing surface when there is sufficient wind, while the drone rotor operates at reduced power or shuts down, effectively increasing the duration of a single flight. The drone automatically controls its rotor structure to adjust its attitude to gain optimal lift by sensing real-time environmental data from wind direction and speed sensors, avoiding the lag and inaccuracy of manual control. Simultaneously, a wireless signal controller instructs the ground kite line device to automatically adjust the line release direction and maintain line tension, achieving closed-loop control between the air and ground. This automatic adjustment mechanism not only significantly reduces labor costs but also further extends flight time by consistently maintaining optimal windward conditions.

[0008] Furthermore, the reel assembly includes a mounting frame, a winding reel, a drive motor, and a locking cylinder. Two symmetrically arranged slide rails are fixed to the top of the turntable, and sliders are slidably arranged on the slide rails. The tops of the two sliders are fixed to the bottom of the mounting frame. The winding reel is rotatably installed inside the mounting frame, and one end of the kite line is wound around the winding reel. An annular block is fixed to the bottom of the turntable, and an annular groove for the annular block to be embedded is opened in the inner wall of the movable frame.

[0009] Furthermore, a shaft hole is formed at the central shaft of the winding wheel, and a linkage shaft is embedded in the shaft hole. The linkage shaft has a rectangular hole that penetrates it, and an annular limiting groove is formed on the inner wall of the shaft hole. Several locking holes that connect to the rectangular hole are formed on the linkage shaft. A locking block is slidably installed in the locking hole. One end of the locking block passes through the locking hole and is embedded in the limiting groove. Guide grooves are formed on both sides of the inner wall of the locking hole. A guide post is fixed in the guide groove. Guide blocks are fixed at both ends of the locking block. The guide block is slidably disposed in the guide groove, and the guide block has a guide hole for the guide post to pass through. A spring is fixed on the inner wall of the guide groove, and the spring is sleeved on the guide post.

[0010] Furthermore, the drive motor is fixed on one side of the mounting bracket, and its output end is connected to one end of the linkage shaft extending outside the mounting bracket via a coupling. The locking electric cylinder is fixed on the other side of the mounting bracket. A locking rod is slidably disposed in the rectangular hole. One end of the locking rod has a groove. The telescopic end of the locking electric cylinder is sleeved and fixed with a first bearing, which is embedded in the groove. The locking rod can rotate relative to the locking electric cylinder. One end of the locking block extending into the rectangular hole has an inclined portion that can cooperate with the locking rod.

[0011] When the locking rod is inserted into the rectangular hole under the drive of the locking electric cylinder, it pushes the locking block to move radially through the inclined part, so that one end of the locking block abuts against the inner wall of the limiting groove, thereby realizing the circumferential locking of the linkage shaft and the winding wheel. At this time, the drive motor can drive the winding wheel to rotate for winding and unwinding. When the locking rod retracts, the locking block no longer has the abutting force against the inner wall of the limiting groove, so that the linkage shaft is disconnected from the winding wheel, and the winding wheel can rotate freely.

[0012] This allows for quick and reliable automatic control of the connection and disconnection between the drive motor and the winding reel. It maintains the connection when precise control of winding and unwinding is required, and immediately disconnects when the winding reel needs to rotate freely. This ensures the accuracy of routine operation while providing safety redundancy for dealing with emergencies (such as sudden changes in wind speed requiring rapid unwinding), preventing the drive motor from being forcibly driven and damaged.

[0013] Furthermore, a dustproof component is fixed to the bottom of the flexible wing surface. The dustproof component includes a dustproof frame and a dustproof cloth. The dustproof frame is fixed to the bottom of the flexible wing surface, and the flexible screen is located inside the dustproof frame. Two symmetrically arranged take-up shafts are fixed inside the dustproof frame, and two take-up motors are fixed on the dustproof frame. The output ends of the two take-up motors are respectively connected to the corresponding two take-up shafts. One end of the dustproof cloth is wound and fixed to one of the take-up shafts, and the other end of the dustproof cloth is fixed to two adjusting take-up ropes. One end of the two adjusting take-up ropes is wound and fixed to the other take-up shaft.

[0014] Furthermore, the frame includes two horizontal bars, two vertical bars, and four L-shaped support rods. First mounting sleeves are fitted at both ends of the horizontal bars, and second mounting sleeves are fixedly fitted at the end of the vertical bars away from the drone body. Both the first and second mounting sleeves are fixed to the top of the wing surface. One end of each of the four support rods is fixed to the side wall of the drone body. Four sets of connecting components, each corresponding to one of the four support rods, are fixed to the bottom of the wing surface. Each connecting component includes hook-and-loop fasteners, telescopic straps, and loop fasteners. One end of the hook-and-loop fastener and one end of the telescopic strap are fixed to the top of the wing surface. The hook-and-loop fasteners and telescopic straps are symmetrically arranged relative to their corresponding support rods. The loop fastener is fixed to the other end of the telescopic strap, which bends around the corresponding support rod to fix the loop fastener to the corresponding hook-and-loop fastener. Mounting cylinders are fixed to both sides of the drone body, and the other end of each vertical bar is embedded in one of the mounting cylinders.

[0015] Furthermore, the power supply line is placed inside the movable frame, with one end of the power supply line passing through the movable frame. A take-up and release assembly is fixed on the movable frame. The take-up and release assembly includes a first support frame and a second support frame. A drive wheel is rotatably mounted on the first support frame, and a take-up and release motor is fixed on the first support frame. The output end of the take-up and release motor is connected to the rotating shaft at one end of the drive wheel. An adjusting wheel is rotatably mounted on the second support frame. The second support frame has two symmetrically arranged adjusting grooves. Bearing seats are slidably arranged in the adjusting grooves. The rotating shafts at both ends of the adjusting wheel are respectively connected to two corresponding bearing seats. An adjusting spring is fixed between the bearing seats and the adjusting grooves. The drive wheel has an annular groove. The power supply line passes between the drive wheel and the adjusting wheel and contacts the groove and the peripheral wall of the adjusting wheel.

[0016] Furthermore, the other end of the kite line is connected to an anti-twist line assembly, which includes a first connecting block and a second connecting block. A connecting post is fixed to the bottom of the second connecting block, and a connecting bearing is sleeved and fixed on the connecting post. A connecting groove is opened on the top of the first connecting block, and the connecting bearing is embedded in the connecting groove. A main hanging ring is fixed to the bottom of the first connecting block, and one end of the kite line is fixedly connected to the main hanging ring. Two symmetrically arranged kite auxiliary lines are fixed on the horizontal bar, and one kite auxiliary line is fixed on the vertical bar. Six auxiliary hanging rings are fixed to the top of the second connecting block, and the six kite auxiliary lines are fixedly connected to the corresponding six auxiliary hanging rings one by one.

[0017] The anti-twist line component effectively prevents excessive torque on the kite line when the kite spins in the air, thus avoiding damage to the kite line. At the same time, it effectively prevents multiple kite sublines from getting tangled and twisted together, ensuring flight safety and smooth control.

[0018] Furthermore, the rotor structure includes a protective cover, a propeller, and a rotary actuator. The protective cover is fixed to the end of the support rod away from the main body of the drone. The rotary actuator is fixed inside the protective cover. The propeller is fixed to the output shaft of the rotary actuator. Four rectangular casters with brakes are installed at the bottom of the moving frame.

[0019] Furthermore, the wing surface is a hexagonal structure arranged symmetrically on both sides.

[0020] The main technical effects of this invention are reflected in the following aspects: 1. This invention solves the core technical problem of short flight time of existing drones by organically combining drones and kites. The drone body controls the rotor structure to adjust the attitude of the entire device based on real-time wind direction and speed data detected by an anemometer. This allows it to generate aerodynamic lift like a traditional kite. With sufficient wind, the rotor structure can operate at reduced power or even shut down completely, using the aerodynamic lift generated by the wing surface to maintain flight altitude. This significantly increases the single flight time of the entire device, avoiding the problem of deployment interruptions caused by frequent charging or battery replacements, and improving the audience experience.

[0021] 2. Due to its ultra-long flight endurance, this invention eliminates the need for frequent mission interruptions and battery changes required by traditional drones when performing long-duration, continuous image projection missions. Operators can launch the drone once and broadcast images continuously for several hours, significantly improving operational efficiency. Simultaneously, operational complexity is greatly reduced, eliminating the need for repeated takeoffs and landings, carrying large quantities of spare batteries, and recharging in the field. This allows a single person to complete long-duration monitoring tasks that previously required multiple personnel and drones.

[0022] 3. The main body of the UAV of this invention automatically controls the rotor structure to adjust its attitude to obtain the best lift by facing the wind based on the environmental data sensed in real time by the wind direction and speed instrument, avoiding the lag and inaccuracy of manual operation; at the same time, the ground kite line device is instructed by the wireless signal controller to automatically adjust the direction of line release and maintain line tension, realizing closed-loop control of air and ground coordination. This automatic adjustment mechanism not only saves a lot of labor costs, but also extends the endurance by always maintaining the best wind-facing state, and effectively avoids the problem of kite loss of control due to sudden wind changes or improper operation. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the skeleton, wing surface and UAV body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the thread reel assembly according to an embodiment of the present invention; Figure 4This is a cross-sectional view of the winding shaft and the winding wheel of the spool assembly in an embodiment of the present invention when they are not locked. Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged view of point A in the middle; Figure 6 This is an embodiment of the present invention. Figure 4 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the locking block according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the assembly structure of the linkage shaft, several locking blocks and locking rod according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the wing surface structure according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the assembly structure of the UAV body, support rod, and rotor structure according to an embodiment of the present invention; Figure 11 This is an exploded structural diagram of the anti-twisting wire assembly according to an embodiment of the present invention; Figure 12 This is an exploded structural diagram of the kite string device according to an embodiment of the present invention; Figure 13 This is a cross-sectional view of the winding shaft of the spool assembly in an embodiment of the present invention when locked to the winding wheel; Figure 14 This is a cross-sectional view of the winding reel according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the structure of the retracting component according to an embodiment of the present invention; Figure 16 This is a cross-sectional view of the second support frame according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached diagram: 1. Frame; 11. Horizontal bar; 12. Vertical bar; 13. Support bar; 2. Wing surface; 21. First mounting sleeve; 22. Second mounting sleeve; 23. Hook and loop fastener; 24. Telescopic belt; 25. Loose hook and loop fastener; 26. Dustproof frame; 261. Dustproof cloth; 262. Rewinding shaft; 263. Rewinding motor; 264. Rewinding rope; 3. Drone body; 31. Flexible screen; 32. Wind vane and anemometer; 33. Mounting cylinder; 34. Protective cover; 35. Propeller; 36. Rotary actuator; 4. Moving frame; 41. Adjusting motor; 42. Tensioning cylinder; 43. Wireless signal controller; 44. Turntable; 441. Slide rail; 442. Slider; 443. Annular block; 45. Annular groove; 46. Universal wheel with brake; 47. Portable power supply; 471. Power supply line; 48. First support frame; 481. Drive wheel; 482. Receiving and discharging motor; 483. Cable groove; 49. Second support frame; 491. Adjusting wheel; 492. Adjusting groove; 493. Bearing seat; 494. Adjusting spring; 5. Mounting bracket; 51. Winding reel; 511. Shaft hole; 512. Limiting groove; 52. Drive motor; 53. Locking electric cylinder; 6. Linkage shaft; 61. Rectangular hole; 62. Locking hole; 63. Guide groove; 631. Guide post; 632. Spring; 7. Locking block; 71. Guide block; 72. Inclined part; 8. Locking rod; 81. Groove; 82. First bearing; 9. First connecting block; 91. Second connecting block; 92. Connecting post; 93. Connecting bearing; 94. Connecting groove; 95. Main hanging ring; 96. Secondary hanging ring; 97. Kite line; 98. Kite secondary line. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1-3 As shown, a drone kite is characterized by comprising: Skeleton 1 is a frame structure; The flexible wing surface 2 is laid on the bottom of the frame 1, and a flexible screen 31 is fixedly installed on its bottom. The wing surface 2 is a hexagonal structure arranged symmetrically on the left and right. The wing surface 2 with the hexagonal structure arranged symmetrically on the left and right can be the head or tail at both ends when adjusting the windward side of the wing surface 2 in the future, so that the angle of the wing surface 2 when rotating horizontally is reduced, the adjustment efficiency is improved, and energy consumption is saved. Several rotor structures are evenly arranged along the edge of the frame 1, and the wing surface 2 is located between the frame 1 and the rotor structure. The main body 3 of the drone is connected to the frame 1 on the side wall and fixed to the wing surface 2 on the top. The flexible screen 31 is connected to the main body 3 of the drone via wires. A wind direction and speed meter 32 is installed on the top of the main body 3 of the drone. The main body 3 of the drone is electrically connected to the rotor structure and the flexible screen 31 and controls their operation. The wind direction and speed meter is essentially a multi-sensor fusion system. It does not require the drone to be absolutely horizontal. Instead, it turns the drone into a dynamic meteorological probe by using mathematical methods such as "measuring its own motion, measuring relative airflow, and vector subtraction". This allows it to calculate the accurate absolute wind direction and speed under any attitude of the aircraft.

[0027] The kite string device, which is connected to the frame 1 via the kite string 97, includes a moving frame 4, an adjusting motor 41, a mobile power supply 47, a reel assembly for reeling in and out of the kite string 97, a tensioning cylinder 42, and a wireless signal controller 43. The mobile power supply 47 is connected to the main body 3 of the drone via a power supply line 471. A turntable 44 is rotatably mounted inside the movable frame 4. The adjusting motor 41 is fixed inside the movable frame 4, and its output end is connected to the bottom of the turntable 44. The reel assembly is slidably mounted on the top of the turntable 44, and one end of the kite line 97 is wound around the reel assembly. The tensioning cylinder 42 is fixed on the top of the turntable 44, and its telescopic end is connected to one end of the reel assembly. The wireless signal controller 43 is mounted on the movable frame 4 and is connected to the adjusting motor 41, the tensioning cylinder 42, and the reel assembly. It also communicates with the main body of the drone 3. The adjusting motor 41 and the tensioning cylinder 42 are equipped with wireless Bluetooth modules that are wirelessly connected to the wireless signal controller 43. The power supply 47 is mounted on the movable frame 4 and is electrically connected to the adjusting motor 41, the tensioning cylinder 42, the reel assembly, and the wireless signal controller 43.

[0028] The tensioning cylinder 42 is a modular product that integrates a servo motor and a lead screw. It converts the rotary motion of the servo motor into linear motion, and the tensioning cylinder 42 can drive the thread pulley assembly to reciprocate along a straight line.

[0029] The main body of the drone 3 controls the rotor structure to adjust the attitude of the drone kite to gain lift by facing the wind, based on the wind direction and speed data detected by the wind direction and speed meter 32. It also controls the adjustment motor 41 to rotate to change the direction of the reel assembly, and controls the tensioning cylinder 42 to drive the reel assembly to slide to maintain the tension of the kite line 97.

[0030] like Figure 3-8As shown in Figures 12-14, the reel assembly includes a mounting frame 5, a winding reel 51, a drive motor 52, and a locking cylinder 53. Both the drive motor 52 and the locking cylinder 53 are electrically connected to a power supply 47 via wires. Two symmetrically arranged slide rails 441 are fixed to the top of the turntable 44. Sliding blocks 442 are slidably mounted on the slide rails 441. The tops of the two sliding blocks 442 are fixed to the bottom of the mounting frame 5. The winding reel 51 is rotatably mounted within the mounting frame 5. One end of the kite line 97 is wound around the winding reel 51. A shaft hole 511 is opened at the central axis of the winding reel 51, and a linkage shaft 6 is embedded within the shaft hole 511. The linkage shaft 6 has a rectangular hole 6 penetrating through it. 1. The inner wall of the shaft hole 511 has an annular limiting groove 512. The linkage shaft 6 has a plurality of locking holes 62 that are connected to rectangular holes 61. A locking block 7 is slidably installed in the locking hole 62. One end of the locking block 7 passes through the locking hole 62 and is embedded in the limiting groove 512. The inner side walls of the locking hole 62 have guide grooves 63. A guide post 631 is fixed in the guide groove 63. Guide blocks 71 are fixed at both ends of the locking block 7. The guide blocks 71 are slidably disposed in the guide groove 63, and the guide blocks 71 have guide holes for the guide post 631 to pass through. A spring 632 is fixed in the inner wall of the guide groove 63. The spring 632 is sleeved on the guide post 631.

[0031] The drive motor 52 is fixed on one side of the mounting bracket 5, and its output end is connected to the end of the linkage shaft 6 extending outside the mounting bracket 5 via a coupling. The locking electric cylinder 53 is fixed on the other side of the mounting bracket 5. A locking rod 8 is slidably disposed in the rectangular hole 61. A groove 81 is opened at one end of the locking rod 8. A first bearing 82 is sleeved and fixed at the telescopic end of the locking electric cylinder 53. The first bearing 82 is embedded in the groove 81. The locking rod 8 can rotate relative to the locking electric cylinder 53. The locking block 7 has an inclined part 72 that can cooperate with the locking rod 8 at one end extending into the rectangular hole 61. An annular block 443 is fixed at the bottom of the turntable 44. An annular groove 45 for the annular block 443 to be embedded is opened in the inner wall of the moving frame 4. A wireless Bluetooth module that is wirelessly connected to the wireless signal controller 43 is installed on the drive motor 52 and the locking electric cylinder 53.

[0032] A switchable linkage mechanism is formed by the cooperation of the linkage shaft 6, locking block 7, locking rod 8, spring 632, and guide post 631. When the locking rod 8 is inserted into the rectangular hole 61 under the drive of the locking electric cylinder 53, it pushes the locking block 7 to move radially through the inclined part 72, so that one end of the locking block 7 is embedded in the limiting groove 512 of the shaft hole 511 of the winding wheel 51, thereby realizing the circumferential locking of the linkage shaft 6 and the winding wheel 51. At this time, the drive motor 52 can drive the winding wheel 51 to rotate for winding and unwinding. When the locking rod 8 retracts, the locking block 7 does not abut against the inner wall of the limiting groove 512, and the abutment between the locking block 7 and the inner wall of the limiting groove 512 disappears, so that the linkage shaft 6 is disconnected from the winding wheel 51, and the winding wheel 51 can rotate freely.

[0033] This allows for quick and reliable automatic control of the connection and disconnection between the drive motor 52 and the winding wheel 51. The connection is maintained when precise control of winding and unwinding is required, and the connection is immediately disconnected when the winding wheel 51 needs to rotate freely. This ensures the accuracy of routine operation and provides a safety redundancy for dealing with emergencies (such as sudden changes in wind force requiring rapid unwinding), preventing the drive motor 52 from being forcibly driven and damaged.

[0034] like Figure 1 , 2 As shown in Figure 10, a dustproof component is fixed to the bottom of the flexible wing surface 2. The dustproof component includes a dustproof frame 26 and a dustproof cloth 261. The dustproof frame 26 is fixed to the bottom of the flexible wing surface 2. The flexible screen 31 is located inside the dustproof frame 26. Two symmetrically arranged take-up shafts 262 are fixed inside the dustproof frame 26. Two take-up motors 263 are fixed on the dustproof frame 26. The output ends of the two take-up motors 263 are respectively connected to the corresponding two take-up shafts 262. One end of the dustproof cloth 261 is wrapped and fixed to one of the take-up shafts 262. The other end of the dustproof cloth 261 is fixed with two adjusting take-up ropes 264. One end of the two adjusting take-up ropes 264 is wrapped and fixed to the other take-up shaft 262.

[0035] Both take-up motors 263 are electrically connected to the UAV body 3 via wires. When the flexible screen 31 is not in use, that is, during the ascent and descent of the wing surface 2, both take-up motors 263 can be driven to rotate clockwise at the same time. One take-up motor 263 drives the corresponding take-up shaft 262 to release the dustproof cloth 261, and the other take-up motor 263 drives the corresponding take-up shaft 262 to wind up the take-up rope 264, thereby enabling the dustproof cloth 261 and the dustproof frame 26 to cooperate and cover the flexible screen 31. When the flexible screen 31 is used, two winding motors 263 are driven to rotate counterclockwise at the same time. One winding motor 263 drives the corresponding winding shaft 262 to wind up the dustproof cloth 261, and the other winding motor 263 drives the corresponding winding shaft 262 to release the winding rope 264. During the winding and releasing of the dustproof cloth 261, the edges of the winding rope 264 and the dustproof cloth 261 are located inside the dustproof frame 26.

[0036] like Figure 1 , 2 As shown in Figures 9 and 10, the frame 1 includes two horizontal bars 11, two vertical bars 12, and four L-shaped support rods 13. First mounting sleeves 21 are fitted at both ends of the horizontal bars 11, and second mounting sleeves 22 are fixedly fitted at the ends of the vertical bars 12 away from the main body 3 of the drone. Both the first and second mounting sleeves 21 are fixed to the top of the wing surface 2. One end of each of the four support rods 13 is fixed to the side wall of the main body 3 of the drone. Four sets of connecting components, each corresponding to one of the four support rods 13, are fixed to the bottom of the wing surface 2. These connecting components include hook-and-loop fasteners. 23. Telescopic strap 24 and hook and loop fastener 25. One end of hook and loop fastener 23 and one end of telescopic strap 24 are fixed to the top of wing surface 2. Hook and loop fastener 23 and telescopic strap 24 are symmetrically arranged with respect to the corresponding support rod 13. Hook and loop fastener 25 is fixed to the other end of telescopic strap 24. Telescopic strap 24 is bent around the corresponding support rod 13 so that hook and loop fastener 25 is fixed to the corresponding hook and loop fastener 23. Mounting cylinders 33 are fixed on both sides of the UAV body 3. The other end of the vertical rod 12 is embedded in the mounting cylinder 33.

[0037] The wire of the winding motor 263 passes through the hole in the wing surface 2. A cavity for placing the wire is provided in the support rod 13. The wire passes through the support rod 13 and is connected to the main body of the drone 3 along the direction of the cavity.

[0038] like Figure 1 , 2 As shown in Figure 11, the other end of the kite line 97 is connected to an anti-twist line assembly. The anti-twist line assembly includes a first connecting block 9 and a second connecting block 91. A connecting post 92 is fixed at the bottom of the second connecting block 91, and a connecting bearing 93 is sleeved and fixed on the connecting post 92. A connecting groove 94 is opened at the top of the first connecting block 9, and the connecting bearing 93 is embedded in the connecting groove 94. A main hanging ring 95 is fixed at the bottom of the first connecting block 9, and one end of the kite line 97 is fixedly connected to the main hanging ring 95. Two symmetrically arranged kite sub-lines 98 are fixed on the horizontal bar 11, and one kite sub-line 98 is fixed on the vertical bar 12. Six auxiliary hanging rings 96 are fixed at the top of the second connecting block 91, and the six kite sub-lines 98 are fixedly connected to the corresponding six auxiliary hanging rings 96 one by one.

[0039] like Figure 1 ,10 As shown in Figure 16, the rotor structure includes a protective cover 34, a propeller 35, and a rotary actuator 36. The protective cover 34 is fixed to the end of the support rod 13 away from the main body 3 of the UAV. The rotary actuator 36 is fixed inside the protective cover 34. The propeller 35 is fixed on the output shaft of the rotary actuator 36. Four rectangular universal wheels 46 with brakes are installed at the bottom of the moving frame 4.

[0040] The power supply cable 471 is placed inside the movable frame 4, with one end of the power supply cable 471 passing through the movable frame 4. A take-up and release assembly is fixed to the movable frame 4. The take-up and release assembly includes a first support frame 48 and a second support frame 49. A drive wheel 481 is rotatably mounted on the first support frame 48, and a take-up / release motor 482 is fixed to the first support frame 48. The output end of the take-up / release motor 482 is connected to the shaft at one end of the drive wheel 481. An adjusting wheel 491 is rotatably mounted on the second support frame 49. The second support frame 49 has two symmetrically arranged adjustment slots 492, and bearing seats 493 are slidably arranged within the adjustment slots 492. The rotating shafts at both ends of the adjustment wheel 491 are respectively connected to the two corresponding bearing seats 493. An adjustment spring 494 is fixed between the bearing seats 493 and the adjustment slots 492. The drive wheel 481 has an annular groove 483. The power supply line 471 passes between the drive wheel 481 and the adjustment wheel 491 and contacts the groove 483 and the peripheral wall of the adjustment wheel 491. The receiver / discharger 482 is electrically connected to the mobile power supply 47 via a wire, and the forward and reverse rotation of the receiver / discharger 482 is controlled by a wireless signal controller 43.

[0041] When the kite rises to a higher altitude: the wireless signal controller 43 controls the receiver 482 to rotate forward, driving the drive wheel 481 to rotate. Under the action of the adjusting spring 494, the adjusting wheel 491 slides along the adjusting groove 492 through the bearing seat 493, always pressing the power supply line 471 tightly in the line groove 483. The drive wheel 481 sends the power supply line 471 out towards the kite through the friction between the line groove 483, the adjusting wheel 491 and the power supply line 471. When the kite descends: the wireless signal controller 43 controls the retractor 482 to reverse, driving the drive wheel 481 to rotate in the opposite direction, retracting the power line 471 from the kite end and sending it into the moving frame 4.

[0042] The specific operation method of this invention is as follows: Place the kite string device at a suitable location on the ground, connect the kite body to the reel assembly via the kite string 97, start the UAV body 3 and its flexible screen 31 and wind direction and speed meter 32, and establish a communication link between the UAV body 3 and the ground wireless signal controller 43.

[0043] The operator sends a takeoff command to the main body of the drone 3 via a remote controller or ground station. The main body of the drone 3 then activates each rotor structure to generate sufficient lift, causing the entire drone kite to rise vertically to the predetermined altitude.

[0044] Adjusting the horizontal orientation of the wing surface 2: The wind direction and speed sensor 32 at the bottom of the UAV body 3 detects the wind direction and speed data of the current environment in real time and transmits the information to the flight control system of the UAV body 3. The UAV body 3 controls the speed difference of each rotor structure according to the wind direction data, so that the entire frame 1 and the wing surface 2 rotate in the horizontal plane. Since the wing surface 2 adopts a left-right symmetrical hexagonal structure, both ends can be used as the head or tail. Therefore, only a small rotation angle is needed to make the wing surface 2 face the wind, which effectively reduces the adjustment energy consumption and improves the response efficiency.

[0045] Adjusting the tilt angle of wing surface 2: The main body 3 of the UAV further controls the rotor structure and adjusts the tilt angle (i.e., angle of attack) of wing surface 2 relative to the horizontal plane, so that the airflow generates sufficient aerodynamic lift on wing surface 2. When the wind speed is suitable, the lift generated by wing surface 2 is sufficient to support the weight of the entire device. At this time, the output power of the rotor structure can be gradually reduced, or even some or all rotors can be shut down, relying solely on the aerodynamic lift of wing surface 2 to maintain flight, thereby greatly saving energy and extending the endurance time.

[0046] Automatic ground device adjustment: During flight, the UAV body 3 sends instructions to the ground kite line device in real time through the wireless signal controller 43. The adjustment motor 41 drives the turntable 44 to rotate according to the instructions, so that the direction of the line wheel assembly is always aligned with the current position of the kite body, preventing the kite line 97 from deviating from the direction of force. At the same time, the tensioning cylinder 42 drives the line wheel assembly to slide along the slide rail 441 according to the tension feedback of the kite line 97, dynamically adjusting the tension of the kite line 97 to ensure that the line tension is always within the optimal range, preventing the kite from becoming unstable or breaking due to excessive tension, or the kite from drifting due to insufficient tension.

[0047] When the ambient wind direction changes, the present invention performs the following adaptive adjustment process: The wind direction and speed meter 32 detects a change in wind direction. The main body of the UAV 3 acquires new wind direction data. The main body of the UAV 3 first commands the ground kite line device to make an initial response through the wireless signal controller 43. The locking cylinder 53 pushes the locking rod 8 to insert. The inclined part 72 of the locking block 7 pushes the locking block 7 to abut against the inner wall of the limiting groove 512. The drive motor 52 is started to drive the winding wheel 51 to rotate and wind up the kite line 97, thereby ensuring the lift of the wing surface 2 and the tension of the kite line 97, and preventing the kite from falling uncontrollably due to the slack line. The main body of the drone 3 controls the rotor structure to appropriately increase power, temporarily restoring the kite body to a horizontal hovering state, i.e., the wing surface 2 is in a horizontal position, and the lift is mainly provided by the rotor. According to the new wind direction, the main body of the drone 3 controls the rotor structure again to rotate the wing surface 2 in the horizontal plane until the axis of symmetry of the wing surface 2 is parallel to the new wind direction. The main body of the drone 3 adjusts the tilt angle of the wing surface 2 to regain optimal aerodynamic lift. Subsequently, the rotor power can be reduced again to enter the energy-saving flight mode. While the kite body completes its attitude adjustment, the adjustment motor 41 of the ground kite line device precisely adjusts the angle of the turntable 44 according to the instructions of the UAV body 3, so that the line output direction of the reel assembly is completely consistent with the new force direction of the kite. Throughout the process, the tensioning cylinder 42 works continuously to ensure a smooth transition of the kite line tension 97.

[0048] When the wind speed and direction meter 32 detects a sudden decrease in wind force: the locking cylinder 53 pushes the locking rod 8 into place, and through the inclined part 72 of the locking block 7, pushes the locking block 7 to abut against the inner wall of the limiting groove 512, and starts the drive motor 52 to drive the winding wheel 51 to rotate, winding the kite line 97. The tensioning cylinder 42 drives the winding wheel assembly to slide along the slide rail 441 according to the tension feedback of the kite line 97, dynamically adjusting the tension of the kite line 97 to ensure that the line tension is always in the optimal range, thereby ensuring the lift of the wing surface 2 and the tension of the kite line 97, and preventing the kite from falling uncontrollably due to the slack line. When the anemometer 32 detects a sudden increase in wind force: the locking cylinder 53 quickly actuates, causing the locking rod 8 to disengage from the locking block 7, and the locking block 7 to be in a loose state (unlocked state). The linkage shaft 6 is disconnected from the winding wheel 51, and the winding wheel 51 becomes a free-rotating state. At this time, the kite line 97 can be quickly released from the winding wheel 51, avoiding breakage or damage to the kite structure due to excessive tension. The tensioning cylinder 42 drives the winding wheel assembly to slide along the slide rail 441 according to the tension feedback of the kite line 97, dynamically adjusting the tension of the kite line 97 to ensure that the line tension is always within the optimal range. After the wind force returns to normal, the locking cylinder 53 pushes the locking rod 8 back in, and pushes the locking block 7 to abut against the inner wall of the limiting groove 512 through the inclined part 72 of the locking block 7, restoring the locking of the linkage shaft 6 and the winding wheel 51. The drive motor 52 then takes over the line winding and releasing control again.

[0049] Active line reel landing: The operator issues a landing command. The UAV main body 3 controls the rotor structure to increase power, giving the kite body sufficient momentum, while the drive motor 52 of the ground reel assembly begins reeling in the line. The UAV main body 3 works in conjunction with the ground device, reeling in the line while decreasing the flight altitude until the kite body lands safely on the ground.

[0050] Through the above-described operation method, this invention realizes intelligent and automated flight control of drone kites. It can not only stay in the air for a long time by utilizing wind power like traditional kites, but also flexibly adjust its attitude and cope with changes in wind direction like drones, significantly improving endurance and operational efficiency. It can be widely used in fields such as long-duration aerial photography, environmental monitoring, and aerial image projection.

[0051] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A drone kite, characterized in that, include: The skeleton (1) is a frame structure; A flexible wing surface (2) is laid on the bottom of the frame (1), and a flexible screen (31) is fixedly installed on its bottom. Several rotor structures are evenly arranged along the edge of the frame (1); The main body (3) of the drone is connected to the frame (1) on the side wall and fixed to the wing surface (2) at the bottom. The main body (3) of the drone is electrically connected to the rotor structure and the flexible screen (31) and controls its operation. A wind direction and anemometer is installed on the top of the main body (3). The kite string device is connected to the frame (1) via the kite string (97) and includes a moving frame (4), an adjusting motor (41), a mobile power supply (47), a reel assembly for reeling in and out of the kite string (97), a tensioning cylinder (42), and a wireless signal controller (43). The mobile power supply (47) is connected to the main body of the drone (3) via a power supply line (471). A turntable (44) is rotatably installed inside the movable frame (4). The regulating motor (41) is fixed inside the movable frame (4), and its output end is connected to the bottom of the turntable (44). The reel assembly is slidably set on the top of the turntable (44), and one end of the kite line (97) is wound around the reel assembly. The tensioning cylinder (42) is fixed on the top of the turntable (44), and its telescopic end is connected to one end of the reel assembly. The wireless signal controller (43) is installed on the movable frame (4) and is connected to the regulating motor (41), the tensioning cylinder (42), and the reel assembly, and communicates with the main body of the drone (3). The mobile power supply (47) is installed on the movable frame (4) and is electrically connected to the regulating motor (41), the tensioning cylinder (42), the reel assembly, and the wireless signal controller (43).

2. The drone kite according to claim 1, characterized in that, The reel assembly includes a mounting frame (5), a winding reel (51), a drive motor (52), and a locking cylinder (53). Two symmetrically arranged slide rails (441) are fixed on the top of the turntable (44). Slider blocks (442) are slidably arranged on the slide rails (441). The tops of the two sliders (442) are fixed to the bottom of the mounting frame (5). The winding reel (51) is rotatably installed in the mounting frame (5). One end of the kite line (97) is wound on the winding reel (51). An annular block (443) is fixed at the bottom of the turntable (44). An annular groove (45) for the annular block (443) to be embedded is opened on the inner wall of the moving frame (4).

3. The drone kite according to claim 2, characterized in that, The winding reel (51) has a shaft hole (511) at its central shaft. A linkage shaft (6) is embedded in the shaft hole (511). The linkage shaft (6) has a rectangular hole (61) that passes through it. An annular limiting groove (512) is formed on the inner wall of the shaft hole (511). Several locking holes (62) that connect to the rectangular hole (61) are formed on the linkage shaft (6). A locking block (7) is slidably installed in the locking hole (62). One end of the locking block (7) passes through the locking hole (62) and is embedded in the limiting groove. Inside the groove (512), guide grooves (63) are opened on both sides of the locking hole (62). A guide post (631) is fixed inside the guide groove (63). Guide blocks (71) are fixed at both ends of the locking block (7). The guide blocks (71) are slidably arranged in the guide groove (63), and the guide blocks (71) have guide holes (72) for the guide post (631) to pass through. A spring (632) is fixed on the inner wall of the guide groove (63), and the spring (632) is sleeved on the guide post (631).

4. The drone kite according to claim 3, characterized in that, The drive motor (52) is fixed on one side of the mounting bracket (5), and its output end is connected to the end of the linkage shaft (6) extending outside the mounting bracket (5) through a coupling. The locking electric cylinder (53) is fixed on the other side of the mounting bracket (5). A locking rod (8) is slidably arranged in the rectangular hole (61). A groove (81) is opened at one end of the locking rod (8). A first bearing (82) is sleeved and fixed at the telescopic end of the locking electric cylinder (53). The first bearing (82) is embedded in the groove (81). The locking rod (8) can rotate relative to the locking electric cylinder (53). The locking block (7) has an inclined part (72) that can cooperate with the locking rod (8) at one end extending into the rectangular hole (61).

5. The drone kite according to claim 1, characterized in that, A dustproof component is fixed to the bottom of the flexible wing surface (2). The dustproof component includes a dustproof frame (26) and a dustproof cloth (261). The dustproof frame (26) is fixed to the bottom of the flexible wing surface (2). The flexible screen (31) is located inside the dustproof frame (26). Two symmetrically arranged take-up shafts (262) are fixed inside the dustproof frame (26). Two take-up motors (263) are fixed on the dustproof frame (26). The output ends of the two take-up motors (263) are respectively connected to the corresponding two take-up shafts (262). One end of the dustproof cloth (261) is wrapped and fixed on one of the take-up shafts (262). The other end of the dustproof cloth (261) is fixed with two adjustable take-up ropes (264). One end of the two adjustable take-up ropes (264) is wrapped and fixed on the other take-up shaft (262).

6. The drone kite according to claim 2, characterized in that, The frame (1) includes two horizontal bars (11), two vertical bars (12), and four L-shaped support bars (13). The two ends of the horizontal bars (11) are fitted with first mounting sleeves (21), and the end of the vertical bars (12) away from the main body of the UAV (3) is fixedly fitted with a second mounting sleeve (22). The first mounting sleeve (21) and the second mounting sleeve (22) are both fixed to the top of the wing surface (2). One end of the four support bars (13) is fixed to the side wall of the main body of the UAV (3). The bottom of the wing surface (2) is fixed with four sets of connecting components that correspond one-to-one with the four support bars (13). The connecting components include hook and loop fasteners (23), telescopic... The strap (24) and the hook and loop fastener (25) are fixed at one end of the hook and loop fastener (23) and one end of the telescopic strap (24) to the top of the wing surface (2). The hook and loop fastener (23) and the telescopic strap (24) are symmetrically arranged relative to the corresponding support rod (13). The hook and loop fastener (25) is fixed at the other end of the telescopic strap (24). The telescopic strap (24) bends around the corresponding support rod (13) so that the hook and loop fastener (25) is fixed to the corresponding hook and loop fastener (23). The two sides of the UAV body (3) are fixed with mounting cylinders (33). The other end of the vertical rod (12) is embedded in the mounting cylinder (33).

7. A drone kite according to claim 6, characterized in that, The power supply line (471) is placed inside the movable frame (4), with one end of the power supply line (471) passing through the movable frame (4). A take-up and release assembly is fixed on the movable frame (4). The take-up and release assembly includes a first support frame (48) and a second support frame (49). A drive wheel (481) is rotatably mounted on the first support frame (48), and a take-up and release motor (482) is fixed on the first support frame (48). The output end of the take-up and release motor (482) is connected to the shaft at one end of the drive wheel (481). An adjustment wheel (491) is rotatably mounted on the second support frame (49). The second support frame (49) has two symmetrically arranged adjustment slots (492). A bearing seat (493) is slidably arranged in the adjustment slot (492). The rotating shafts at both ends of the adjustment wheel (491) are respectively connected to the two corresponding bearing seats (493). An adjustment spring (494) is fixed between the bearing seat (493) and the adjustment slot (492). The drive wheel (481) has an annular wire groove (483). The power supply line (471) passes between the drive wheel (481) and the adjustment wheel (491) and contacts the wire groove (483) and the peripheral wall of the adjustment wheel (491).

8. A drone kite according to claim 6, characterized in that, The kite line (97) is connected to an anti-twist assembly at the other end. The anti-twist assembly includes a first connecting block (9) and a second connecting block (91). A connecting post (92) is fixed at the bottom of the second connecting block (91). A connecting bearing (93) is sleeved and fixed on the connecting post (92). A connecting groove (94) is opened at the top of the first connecting block (9). The connecting bearing (93) is embedded in the connecting groove (94). A main hanging ring (95) is fixed at the bottom of the first connecting block (9). One end of the kite line (97) is fixedly connected to the main hanging ring (95). Two symmetrically arranged kite sub-lines (98) are fixed on the horizontal bar (11). One kite sub-line (98) is fixed on the vertical bar (12). Six auxiliary hanging rings (96) are fixed at the top of the second connecting block (91). The six kite sub-lines (98) are fixedly connected to the corresponding six auxiliary hanging rings (96) one by one.

9. A drone kite according to claim 6, characterized in that, The rotor structure includes a protective cover (34), a propeller (35), and a rotary actuator (36). The protective cover (34) is fixed to the end of the support rod (13) away from the main body (3) of the UAV. The rotary actuator (36) is fixed inside the protective cover (34). The propeller (35) is fixed on the output shaft of the rotary actuator (36). The bottom of the moving frame (4) is equipped with four rectangular universal wheels (46) with brakes.

10. A drone kite according to claim 1, characterized in that, The wing surface (2) is a hexagonal structure arranged symmetrically on the left and right.

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