A device for testing wind resistance of a drone

Abstract

The utility model provides a kind of unmanned aerial vehicle wind resistance testing device, including base, wind production piece is installed on the upper surface of base, support is installed on the upper surface of base, the upper end of support is provided with jack, adjusting rod is inserted in jack, adjusting rod keeps relative position fixed by positioning screw and support, the upper end of hanging rope keeps relative position unchanged with adjusting rod one end, unmanned aerial vehicle is installed in the lower end of hanging rope by supporting piece, the utility model has the beneficial effects as follows: deformation, fracture caused by collision are avoided to fuselage, wing, rotor, equipment maintenance cost is reduced, ensure that test process is continuously carried out, and test is interrupted due to equipment damage is avoided.

Description

Technical Field

[0001] This utility model is a device for testing the wind resistance of unmanned aerial vehicles (UAVs), belonging to the field of UAV technology. Background Technology

[0002] Wind resistance is a core performance indicator for drones, measuring their flight stability, mission continuity, and safety controllability under airflow interference. It directly determines whether a drone can operate reliably in complex outdoor environments (such as high-altitude operations, maritime inspections, and emergency rescue). Wind resistance testing requires "simulating real wind field environments + quantifying performance parameters" to comprehensively evaluate the drone's flight attitude, control response, and load adaptability under different wind speeds and directions, providing data support for drone design optimization, scenario adaptation, and safe use. In drone wind resistance testing (especially in low-cost testing scenarios for small and medium-sized drones), wind turbines have become commonly used equipment for simulating real wind field environments due to their advantages of "easy operation, controllable cost, and flexible wind speed adjustment." The core testing logic is: by generating directional airflow through wind turbine operation, the drone, which is hovering or flying at low speed, is placed within the airflow coverage area. Then, by adjusting the wind turbine power to change the airflow speed (e.g., gradually increasing from a light breeze to a strong wind), the changes in the drone's flight attitude under different wind speeds and airflow are observed and recorded. This provides a preliminary assessment of the drone's wind resistance response capability and is widely used in small-scale laboratory tests or simple outdoor wind resistance verification scenarios.

[0003] This wind farm simulation method, which relies on wind turbines, has significant safety risks and limitations in application scenarios. Among these, the most prominent problem is damage caused by uncontrolled drone falls. From the perspective of airflow characteristics, when the airflow velocity exceeds the drone's wind resistance threshold, the drone's flight control system may not be able to adjust the motor speed and control surface angle in time to balance the airflow impact, leading to loss of attitude control. Once the drone loses control, it will instantly lose lift balance and fall vertically from its flight altitude. The drone's fuselage, wings, rotor, and other components will deform or break due to the violent impact, increasing equipment maintenance costs, interrupting the testing process, and affecting testing efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for testing the wind resistance of drones, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a device for testing the wind resistance of unmanned aerial vehicles (UAVs), comprising:

[0006] Base;

[0007] The air-generating component is installed on the upper surface of the base;

[0008] A support column is installed on the upper surface of the base, and an insertion hole is provided at the upper end of the support column;

[0009] An adjusting rod is inserted into a socket, and the adjusting rod is fixed in a relative position to the support column by a positioning screw;

[0010] The upper end of the suspension rope remains in a constant relative position with one end of the adjusting rod.

[0011] The drone is mounted on the lower end of the suspension rope via a support structure.

[0012] Furthermore, the air-generating component includes a variable frequency motor. The variable frequency motor is installed on the side of the upper surface of the base away from the support column. A first pulley is installed on the output shaft of the variable frequency motor. A bushing is installed on the upper surface of the base. A transmission shaft is rotatably installed inside the bushing. Multiple fan blades are installed in a ring at equal intervals at one end of the transmission shaft. A second pulley is installed at the end of the transmission shaft away from the fan blades. The first pulley is connected to the second pulley through a transmission belt.

[0013] Furthermore, the support includes a cross, the lower end of the suspension rope is fitted with a cross, and the upper surface of the drone is connected to a frame via multiple connecting rods, with the cross hooked to the frame.

[0014] Furthermore, a hook is installed at the bottom center of the cross, and a hanging ring is installed at the center of the frame, with the hook and the hanging ring being connected.

[0015] Furthermore, a blind hole is formed by a recess in the middle of the upper surface of the cross, and the lower end of the suspension rope is glued into the blind hole.

[0016] Furthermore, both ends of the connecting rod are machined with external threads. The lower end of the connecting rod is threadedly connected to the UAV. A circular hole is provided at the position where the connecting rod is installed on the frame. The upper end of the connecting rod passes through the circular hole. Nuts are provided on both the upper and lower sides of the circular hole, and the nuts are threadedly connected to the connecting rod.

[0017] Furthermore, the cross-section of the socket is rectangular, and the cross-section of the adjusting rod is rectangular.

[0018] Furthermore, the upper surface of the support column is machined with a threaded hole, which communicates with the insertion hole. The positioning screw is threaded into the threaded hole, and one end of the positioning screw is in contact with the adjusting rod.

[0019] The beneficial effects of this utility model are:

[0020] The drone is suspended from the lower end of an adjustable rod by ropes and supports, forming a soft suspension constraint. When the airflow velocity exceeds the drone's wind resistance threshold, causing it to lose control, the ropes can directly bear the drone's weight, preventing it from falling vertically from the test height. Compared to the risk of loss of control and fall in traditional unconstrained wind turbine testing, this suspension structure completely avoids deformation and breakage of the fuselage, wings, and rotor caused by impact, reducing equipment maintenance costs, ensuring continuous testing, and preventing test interruptions due to equipment damage. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of a device for testing the wind resistance of a drone according to the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a schematic diagram of the assembly of the support column and the base in a device for testing the wind resistance of a drone according to this utility model.

[0025] Figure 4 This is a schematic diagram of the assembly of the cross and the drone in a device for testing the wind resistance of a drone according to this utility model.

[0026] In the picture:

[0027] 1. Bottom;

[0028] 2. Variable frequency motor; 21. First pulley; 22. Drive belt; 23. Second pulley; 24. Bushing; 25. Drive shaft; 26. Fan blade;

[0029] 3. Support column; 31. Insertion hole; 32. Threaded hole;

[0030] 4. Adjusting rod;

[0031] 5. Positioning screws;

[0032] 6. Suspension rope; 61. Cross; 62. Hook; 63. Hanging ring; 64. Nut; 65. Connecting rod; 66. Frame;

[0033] 7. Drones. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0035] Please see Figures 1-4 This utility model provides a technical solution: a device for testing the wind resistance of a drone, including a base 1. A variable frequency motor 2 is installed on the side of the upper surface of the base 1 away from the support column 3. A first pulley 21 is installed on the output shaft of the variable frequency motor 2. A bushing 24 is installed on the upper surface of the base 1. A transmission shaft 25 is rotatably installed inside the bushing 24. Multiple fan blades 26 are installed in a ring at equal intervals at one end of the transmission shaft 25. A second pulley 23 is installed on the end of the transmission shaft 25 away from the fan blades 26. The first pulley 21 is connected to the second pulley 23 through a transmission belt 22. The variable frequency motor 2 can drive the transmission shaft 25 to rotate the fan blades 26 by adjusting the output power to generate airflow at different speeds. When the variable frequency motor 2 operates at low power, the fan blades 26 rotate slowly, generating a light breeze-level airflow, which is suitable for the initial wind resistance test of the drone 7. As the power increases, the fan blades 26 rotate faster, and the airflow speed gradually increases to the strong wind level, which is suitable for the extreme wind resistance test of the drone 7. Compared to traditional fixed-speed fans, this stepless speed regulation design can more accurately simulate the gradual wind field from light breeze to strong wind, as well as the test scenario of gusts (by instantaneously adjusting the power of the variable frequency motor 2), comprehensively evaluate the attitude changes and control response of the UAV 7 under different wind speeds, and provide richer data support for the quantification of the wind resistance performance of the UAV 7.

[0036] See Figures 1-3 The support column 3 is installed on the upper surface of the base 1. The upper end of the support column 3 has a rectangular cross-section insertion hole 31. The rectangular cross-section adjustment rod 4 is inserted into the insertion hole 31. The adjustment rod 4 is fixed in relative position to the support column 3 by the positioning screw 5. The upper surface of the support column 3 is machined with a threaded hole 32, which communicates with the insertion hole 31. The positioning screw 5 is threaded into the threaded hole 32, and one end of the positioning screw 5 is in contact with the adjustment rod 4. According to the length of the suspension rope 6, the position of the adjustment rod 4 is adjusted along the insertion hole 31. At this time, the distance between the drone 7 and the fan blade 26 changes. After the positioning screw 5 restricts the relative position of the adjustment rod 4 and the support column 3, the drone 7 will not collide with the fan blade 26 when it goes out of control.

[0037] See Figures 1-4The upper end of the suspension rope 6 and one end of the adjusting rod 4 remain in a fixed relative position. A cross 61 is installed at the lower end of the suspension rope 6, with a blind hole formed by a recess in the middle of the upper surface of the cross 61. The lower end of the suspension rope 6 is glued into the blind hole. The upper surface of the drone 7 is connected to the frame 66 by multiple connecting rods 65. Both ends of the connecting rods 65 are machined with external threads. The lower end of the connecting rods 65 is threaded to the drone 7. A round hole is opened at the position where the connecting rods 65 are installed on the frame 66. The upper end of the connecting rod 65 passes through the round hole. Nuts 64 are provided on the upper and lower sides of the round hole. The nuts 64 are threaded to the connecting rods 65. The threaded connection facilitates the connection between the connecting rods 65 and the frame. 66. The disassembly of the drone 7 facilitates reuse. A hook 62 is installed at the bottom center of the cross 61, and a hanging ring 63 is installed in the center of the frame 66. The hook 62 and the hanging ring 63 are connected to complete the connection between the cross 61 and the frame 66. The cross 61 and the frame 66 work together to prevent the out-of-control drone 7 from contacting the suspension rope 6. The drone 7 is suspended from the lower end of the adjusting rod 4 by the suspension rope 6 and the support, forming a soft suspension constraint. When the airflow velocity exceeds the wind resistance threshold of the drone 7, causing the drone 7 to lose attitude control, the suspension rope 6 can directly bear the weight of the drone 7, preventing it from falling vertically from the test height. Compared with the risk of loss of control and fall in traditional unconstrained wind turbine testing, this suspension structure can completely avoid deformation and breakage of the fuselage, wings, and rotor caused by impact, reduce equipment maintenance costs, ensure the continuous operation of the testing process, and avoid interruption of testing due to equipment damage.

[0038] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

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