A lightning protection grounding test device for wind turbine blades based on an unmanned aerial vehicle

Abstract

The present invention relates to a lightning protection grounding test device for the blades of a wind turbine based on an unmanned aerial vehicle. It includes an unmanned aerial vehicle, a robotic arm arranged on the bottom surface of the unmanned aerial vehicle, an adsorption device arranged on the unmanned aerial vehicle and the robotic arm, a water spraying device arranged on the unmanned aerial vehicle and the robotic arm, and a controller. A wire for grounding test is connected to the adsorption device, and the controller is respectively connected to the unmanned aerial vehicle, the robotic arm, the adsorption device, and the water spraying device in a signal connection. The controller can control the unmanned aerial vehicle to approach the lightning arrester through a camera, control the robotic arm to make the bottom end of the robotic arm approach the lightning arrester, the water spraying device sprays water at the lightning arrester, a pneumatic grinding machine grinds the water spraying area, and the adsorption device can connect the wire to the lightning arrester.

Description

Technical Field

[0001] The present invention relates to a lightning protection grounding test device for wind turbine blades based on an unmanned aerial vehicle (UAV). Background Art

[0002] Since the wind turbine blades are located at high altitudes and are prone to being struck by lightning during thunderstorms, lightning protection arresters are provided on the blades. When conducting the lightning protection grounding test of the blades, the operators reach the lightning arrester on the blade in the form of "spidermen" or by using an aerial work platform basket, grind the metal oxide layer on the surface of the arrester with a file and then connect the wires to measure the resistance, which is somewhat dangerous.

[0003] Existing document CN201820123731.9, a wind turbine blade conductivity test device, includes a blade and a measuring device. A detection line is arranged inside the blade, a connecting line is arranged in parallel on the detection line, a lightning arrester is arranged at a connection point of the detection line and the connecting line, the detection line and the connecting line are respectively connected to the measuring device, and a hub internal grounding system connection point is arranged at one end of the blade.

[0004] Adopting this method, when there is a problem with the detection line, the operator still needs to reach the lightning arrester on the blade to conduct the wiring test.

[0005] Existing document CN202011209661.7, a new modular lightning protection grounding test point device, includes a test point wire box for realizing the quick embedded installation of the test point wire box and a reserved wall hole for grounding test or artificial earthing electrode access; a ferrule connection device for realizing the quick and reliable connection with the lead wire of the natural earthing body of the building; and a wire for connecting the test point wire box and the ferrule connection device.

[0006] Adopting this method, the operator still needs to reach the lightning arrester on the blade to conduct the wiring test. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a remotely controllable lightning protection grounding test device for wind turbine blades based on an unmanned aerial vehicle (UAV).

[0008] The present invention adopts the following technical scheme:

[0009] The present invention is used for resistance wiring of the lightning arrester attached to the blade surface, and includes an unmanned aerial vehicle (UAV), a robotic arm arranged on the bottom surface of the UAV, an adsorption device arranged on the UAV and the robotic arm, a water spraying device arranged on the UAV and the robotic arm, and a controller. A wire for grounding test is connected to the adsorption device, and the controller is respectively in signal connection with the UAV, the robotic arm, the adsorption device, and the water spraying device.

[0010] The robotic arm of the present invention includes a rotating arm, a swinging arm, and a telescopic arm. A rotating shaft motor is provided at the connection between the upper end of the rotating arm and the bottom surface of the drone. The upper end of the swinging arm is located inside the lower end of the rotating arm. A motor sleeve is provided at the connection between the rotating arm and the swinging arm, and the motor sleeve is located inside the swinging arm.

[0011] The motor sleeve includes a sleeve body located inside the swinging arm, a quadrangular prism fixedly provided on the left side of the sleeve body, a cylinder fixedly provided on the left side of the quadrangular prism, and a groove provided on the right side of the sleeve body. A swinging shaft motor is provided in the groove. The width of the quadrangular prism is greater than the diameter of the cylinder. The cylinder penetrates through the left side of the rotating arm, the quadrangular prism is clamped on the left side of the swinging arm, the right side of the sleeve body sequentially penetrates through the right side of the swinging arm and the right side of the rotating arm. The output shaft located on the left side of the swinging shaft motor is fixedly connected to the sleeve body. A cover plate is connected to the right side of the swinging shaft motor, and the cover plate is located on the right side surface of the rotating arm and fixedly connected to the right side surface of the rotating arm.

[0012] A lead screw motor is fixedly provided inside the swinging arm. The lead screw on the lead screw motor penetrates downward through the bottom end of the swinging arm and the upper end of the telescopic arm and reaches the inside of the telescopic arm. The connection between the lead screw and the telescopic arm is a threaded connection. Two guide rods parallel to the lead screw are fixedly provided inside the swinging arm. The guide rods penetrate downward through the bottom end of the swinging arm and the upper end of the telescopic arm and reach the inside of the telescopic arm. A limit ring is provided at the bottom end of the guide rod.

[0013] The rotating shaft motor, the swinging shaft motor, and the lead screw motor are respectively signal-connected to a controller.

[0014] The water spraying device of the present invention includes a liquid compression tank provided on the drone, a water spraying port fixedly provided at the bottom end of the telescopic arm, a water pipe communicating between the liquid compression tank and the water spraying port, and an electromagnetic valve provided on the water pipe. The electromagnetic valve is signal-connected to the controller.

[0015] The adsorption device of the present invention includes a vacuum generator provided on the drone, a shock absorption device provided at the bottom end of the telescopic arm, an air pipe communicating between the vacuum generator and the shock absorption device, a suction cup provided below the shock absorption device, and a thin metal sheet provided inside the suction cup. A wire is fixedly provided on the suction cup and connected to the thin metal sheet. The vacuum generator is signal-connected to the controller.

[0016] The shock absorption device of the present invention includes a suction seat A fixedly arranged at the lower end of the telescopic arm, a guide air hole A arranged inside the suction seat A, a guide air pipe sleeved on the upper part inside the guide air hole A, a suction seat B fixedly arranged at the bottom end of the guide air pipe, two magnets A respectively arranged on both sides of the bottom end of the suction seat A, and two magnets B respectively arranged on both sides of the top end of the suction seat B and oppositely arranged with respect to the magnets A. The upper end of the guide air hole A is communicated with an air pipe, the guide air pipe is fixedly connected with the suction seat B, the guide air pipe penetrates through the suction seat B and the lower end is communicated with a suction cup, and the polarities of the magnets A are opposite to and in contact with the polarities of the opposite magnets B.

[0017] A guide frame is arranged below the drone of the present invention, and guide pulleys are arranged on the guide frame, and the wire is arranged on the guide pulleys.

[0018] A protective cover is fixedly arranged on the drone of the present invention, and the protective cover is located at the edge of the wing.

[0019] A camera and a pneumatic grinding machine are further arranged at the bottom end of the telescopic arm of the present invention. The pneumatic grinding machine is communicated with a vacuum generator, and the camera is signal-connected to a controller.

[0020] A foldable landing gear is arranged at the lower end of the drone of the present invention.

[0021] The positive effects of the present invention are as follows:

[0022] 1. The controller can control the drone to approach the lightning arrester through the camera, control the robotic arm, make the bottom end of the robotic arm approach the lightning arrester, the water spraying device sprays water at the lightning arrester, and the pneumatic grinding machine grinds the water spraying place, and the adsorption device can connect the wire with the lightning arrester.

[0023] 2. The controller can control the rotation shaft motor to rotate, and the motor sleeve and the swing shaft motor can make the swing arm and the rotating arm swing relatively. The controller controls the lead screw motor, and the telescopic arm can complete the telescopic action driven by the lead screw and the guide rod.

[0024] 3. The controller controls the liquid compression tank to convey liquid into the water spraying port through the solenoid valve and spray it on the lightning arrester, and then grinds the spraying place through the pneumatic grinding machine.

[0025] 4. The vacuum generator can generate positive pressure and negative pressure on the suction cup through the shock absorption device. When negative pressure is generated in the suction cup, the suction cup closely adheres to the position of the lightning arrester on the blade, so that the thin metal sheet is connected with the lightning arrester to complete the wiring test; the vacuum generator also provides positive pressure for the pneumatic grinding machine to make the pneumatic grinding machine in a working state.

[0026] 5. The suction cup is closely attached to the position of the lightning arrester on the blade through the air guide hole A and the air guide pipe. When it shakes due to external factors, the magnet A can be separated from the magnet B, and the air guide pipe slides in the air guide hole A, thus preventing the suction cup from detaching from the blade. Under the action of magnetic force, the magnet A and the magnet B resume the contact state.

[0027] 6. The guide frame and the guide pulley can prevent the wire from contacting the wing of the drone.

[0028] 7. The protective cover can protect the wing of the drone.

[0029] 8. The foldable landing gear can support the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the present invention;

[0031] Figure 2 is a schematic diagram of the position of the thin metal sheet of the present invention;

[0032] Figure 3 is a schematic diagram of the position of the guide frame of the present invention;

[0033] Figure 4 is a schematic structural diagram of the robotic arm of the present invention;

[0034] Figure 5 is a schematic diagram of the position of the cover plate of the present invention;

[0035] Figure 6 is a schematic structural diagram of the adsorption device of the present invention;

[0036] Figure 7 is a schematic structural diagram of the motor sleeve of the present invention;

[0037] Figure 8 is a schematic diagram of the position of the groove of the present invention;

[0038] Figure 9 is a schematic diagram of the position of the solenoid valve of the present invention.

[0039] In the accompanying drawings: 1, unmanned aerial vehicle; 2, wire; 3, rotating arm; 4, swinging arm; 5, telescopic arm; 6, rotating shaft motor; 7, motor sleeve; 8, sleeve body; 9, quadrangular prism; 10, cylinder; 11, groove; 12, swinging shaft motor; 13, lead screw motor; 14, guide rod; 15, limit ring; 16, liquid compression tank; 17, water spray nozzle; 18, water pipe; 19, solenoid valve; 20, vacuum generator; 21, air pipe; 22, suction cup; 23, thin metal sheet; 24, suction seat A; 25, air guide hole A; 26, air duct; 27, suction seat B; 28, magnet A; 29, magnet B; 30, guide frame; 31, guide pulley; 32, protective cover; 33, camera; 34, pneumatic grinding machine; 35, foldable landing gear; 36, cover plate. Detailed implementation manners

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0041] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, top, bottom, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0044] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0045] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0046] Embodiment 1

[0047] As shown in Figure 1 —9, the present invention is used for resistive wiring of a lightning arrester attached to the surface of a blade, and includes a drone 1, a robotic arm provided on the bottom surface of the drone 1, an adsorption device provided on the drone 1 and the robotic arm, a water spraying device provided on the drone 1 and the robotic arm, and a controller. A wire 2 for grounding test is connected to the adsorption device, and the controller is respectively in signal connection with the drone 1, the robotic arm, the adsorption device, and the water spraying device. The controller can control the drone 1 to approach the lightning arrester through a camera 33, control the robotic arm to make the bottom end of the robotic arm approach the lightning arrester, the water spraying device sprays water at the lightning arrester, and a pneumatic grinder 34 grinds the water spraying area. The adsorption device can connect the wire 2 to the lightning arrester.

[0048] The robotic arm includes a rotating arm 3, a swinging arm 4, and a telescopic arm 5. A rotating shaft motor 6 is provided at the connection between the upper end of the rotating arm 3 and the bottom surface of the drone 1. The upper end of the swinging arm 4 is located inside the lower end of the rotating arm 3. A motor sleeve 7 is provided at the connection between the rotating arm 3 and the swinging arm 4, and the motor sleeve 7 is located inside the swinging arm 4;

[0049] The motor sleeve 7 includes a sleeve body 8 located inside the swinging arm 4, a quadrangular prism 9 fixedly provided on the left side of the sleeve body 8, a cylinder 10 fixedly provided on the left side of the quadrangular prism 9, and a groove 11 provided on the right side of the sleeve body 8. A swinging shaft motor 12 is provided in the groove 11. The width of the quadrangular prism 9 is greater than the diameter of the cylinder 10. The cylinder 10 penetrates through the left side of the rotating arm 3, and the quadrangular prism 9 is clamped on the left side of the swinging arm 4. The right side of the sleeve body 8 sequentially penetrates through the right side of the swinging arm 4 and the right side of the rotating arm 3. The output shaft on the left side of the swinging shaft motor 12 is fixedly connected to the sleeve body 8. A cover plate 36 is connected to the right side of the swinging shaft motor 12, and the cover plate 36 is located on the right side surface of the rotating arm 3 and is fixedly connected to the right side surface of the rotating arm 3;

[0050] A lead screw motor 13 is fixedly provided inside the swinging arm 4. The lead screw on the lead screw motor 13 penetrates downward through the bottom end of the swinging arm 4 and the upper end of the telescopic arm 5 and extends to the inside of the telescopic arm 5. The connection between the lead screw and the telescopic arm 5 is a threaded connection. Two guide rods 14 parallel to the lead screw are fixedly provided inside the swinging arm 4. The guide rods 14 penetrate downward through the bottom end of the swinging arm 4 and the upper end of the telescopic arm 5 and extend to the inside of the telescopic arm 5. A limit ring 15 is provided at the bottom end of the guide rod 14;

[0051] The rotating shaft motor 6, the swinging shaft motor 12, and the lead screw motor 13 are respectively signal-connected to the controller.

[0052] The controller can control the rotating shaft motor 6 to rotate. The motor sleeve 7 and the swinging shaft motor 12 can cause relative swinging between the swinging arm 4 and the rotating arm 3. By controlling the lead screw motor 13 with the controller, the telescopic arm 5 can complete the telescopic action driven by the lead screw and the guide rods 14.

[0053] The water spraying device includes a liquid compression tank 16 provided on the drone 1, a water spraying port 17 fixedly provided at the bottom end of the telescopic arm 5, a water pipe 18 connected between the liquid compression tank 16 and the water spraying port 17, and an electromagnetic valve 19 provided on the water pipe 18. The electromagnetic valve 19 is signal-connected to the controller. The controller controls the liquid compression tank 16 to deliver liquid into the water spraying port 17 through the electromagnetic valve 19 and spray it on the lightning arrester, and then grinds the sprayed area with a pneumatic grinding machine 34.

[0054] The adsorption device includes a vacuum generator 20 arranged on the drone 1, a shock absorption device arranged at the bottom end of the telescopic arm 5, an air pipe 21 connected between the vacuum generator 20 and the shock absorption device, a suction cup 22 arranged below the shock absorption device, and a thin metal sheet 23 arranged inside the suction cup 22. The wire 2 is fixedly arranged on the suction cup 22 and connected to the thin metal sheet 23. The vacuum generator 20 is signal-connected to the controller. The vacuum generator 20 can generate positive pressure and negative pressure on the suction cup 22 through the shock absorption device. When negative pressure is generated inside the suction cup 22, the suction cup 22 closely adheres to the position of the lightning arrester on the blade, and then the thin metal sheet 23 is connected to the lightning arrester to complete the wiring test. The vacuum generator 20 also provides positive pressure for the pneumatic grinder 34 to make the pneumatic grinder 34 in a working state.

[0055] The shock absorption device includes a suction seat A24 fixedly arranged at the lower end of the telescopic arm 5, a guide air hole A25 arranged inside the suction seat A24, a guide air pipe 26 sleeved on the upper part of the guide air hole A25, a suction seat B27 fixedly arranged at the bottom end of the guide air pipe 26, two magnets A28 respectively arranged on both sides of the bottom end of the suction seat A24, and two magnets B29 respectively arranged on both sides of the top end of the suction seat B27 and arranged opposite to the magnets A28. The upper end of the guide air hole A25 is communicated with the air pipe 21. The guide air pipe 26 is fixedly connected to the suction seat B27. The guide air pipe 26 penetrates through the suction seat B27 and the lower end is communicated with the suction cup 22. The polarities of the magnets A28 are opposite to those of the opposite magnets B29 and are in contact. The suction cup 22 closely adheres to the position of the lightning arrester on the blade through the guide air hole A25 and the guide air pipe 26. When shaking occurs due to external factors, the magnet A28 can be separated from the magnet B29, and the guide air pipe 26 slides in the guide air hole A25, thereby preventing the suction cup 22 from detaching from the blade. Under the action of magnetic force, the magnet A28 and the magnet B29 resume the contact state.

[0056] Embodiment 2

[0057] As shown in Figure 1 —9, based on Embodiment 1, a guide frame 30 is arranged below the drone 1. A guide pulley 31 is arranged on the guide frame 30. The wire 2 is arranged on the guide pulley 31. The guide frame 30 and the guide pulley 31 can prevent the wire 2 from contacting the wing of the drone 1.

[0058] A protective cover 32 is fixedly arranged on the drone 1. The protective cover 32 is located at the edge of the wing. The protective cover 32 can protect the wing of the drone 1.

[0059] Embodiment 3

[0060] As shown in Figure 1As shown in FIGS. 1-9, based on Embodiment 1 and Embodiment 2, a camera 33 and a pneumatic grinder 34 are further provided at the bottom end of the telescopic arm 5. The pneumatic grinder 34 is communicated with a vacuum generator 20, and the camera 33 is signal-connected to a controller.

[0061] A foldable landing gear 35 is provided at the lower end of the drone 1. The foldable landing gear 35 can support the drone 1.

[0062] At present, the technical solution of the present application has been piloted, that is, small-scale experiments before large-scale mass production of the product; after the pilot test is completed, user usage research has been carried out on a small scale, and the research results show that the user satisfaction is relatively high; now it has started to prepare for the formal production and industrialization of the product (including research on intellectual property risk early warning).

[0063] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightning protection grounding test device for wind turbine blades based on an unmanned aerial vehicle, which is used for resistance wiring of a lightning arrester attached to the blade surface, and is characterized in that: It includes a drone (1), a robotic arm arranged on the bottom surface of the drone (1), an adsorption device arranged on the drone (1) and the robotic arm, a water spraying device arranged on the drone (1) and the robotic arm, and a controller. A wire (2) for grounding test is connected to the adsorption device. The controller is respectively in signal connection with the drone (1), the robotic arm, the adsorption device, and the water spraying device; The robotic arm includes a rotating arm (3), a swinging arm (4), and a telescopic arm (5). A rotating shaft motor (6) is arranged at the connection of the upper end of the rotating arm (3) and the bottom surface of the drone (1). The upper end of the swinging arm (4) is located inside the lower end of the rotating arm (3). A motor sleeve (7) is arranged at the connection of the rotating arm (3) and the swinging arm (4). The motor sleeve (7) is located inside the swinging arm (4); The motor sleeve (7) includes a sleeve body (8) located inside the swinging arm (4), a quadrangular prism (9) fixedly arranged on the left side of the sleeve body (8), a cylinder (10) fixedly arranged on the left side of the quadrangular prism (9), and a groove (11) arranged on the right side of the sleeve body (8). A swinging shaft motor (12) is arranged in the groove (11). The width of the quadrangular prism (9) is greater than the diameter of the cylinder (10). The cylinder (10) penetrates through the left side of the rotating arm (3). The quadrangular prism (9) is clamped on the left side of the swinging arm (4). The right side of the sleeve body (8) penetrates through the right side of the swinging arm (4) and the right side of the rotating arm (3) in sequence. The output shaft on the left side of the swinging shaft motor (12) is fixedly connected to the sleeve body (8). A cover plate (36) is connected to the right side of the swinging shaft motor (12). The cover plate (36) is located on the right side surface of the rotating arm (3) and is fixedly connected to the right side surface of the rotating arm (3); A lead screw motor (13) is fixedly arranged inside the swinging arm (4). The lead screw on the lead screw motor (13) penetrates downward through the bottom end of the swinging arm (4) and the upper end of the telescopic arm (5) and reaches the inside of the telescopic arm (5). The connection between the lead screw and the telescopic arm (5) is a threaded connection. Two guide rods (14) parallel to the lead screw are fixedly arranged inside the swinging arm (4). The guide rods (14) penetrate downward through the bottom end of the swinging arm (4) and the upper end of the telescopic arm (5) and reach the inside of the telescopic arm (5). A limit ring (15) is arranged at the bottom end of the guide rod (14); The rotating shaft motor (6), the swinging shaft motor (12), and the lead screw motor (13) are respectively in signal connection with the controller; The adsorption device includes a vacuum generator (20) arranged on the drone (1), a shock absorption device arranged at the bottom end of the telescopic arm (5), an air pipe (21) communicating between the vacuum generator (20) and the shock absorption device, a suction cup (22) arranged below the shock absorption device, and a thin metal sheet (23) arranged inside the suction cup (22). The wire (2) is fixedly arranged on the suction cup (22) and is connected to the thin metal sheet (23). The vacuum generator (20) is in signal connection with the controller.

2. The lightning protection grounding test device for the blade of a wind turbine generator based on an unmanned aerial vehicle according to claim 1, characterized in that: The shock absorption device includes a suction seat A (24) fixedly arranged at the lower end of the telescopic arm (5), a guide air hole A (25) arranged inside the suction seat A (24), a guide air pipe (26) with its upper part sleeved in the guide air hole A (25), a suction seat B (27) fixedly arranged at the bottom end of the guide air pipe (26), two magnets A (28) respectively arranged on both sides of the bottom end of the suction seat A (24), and two magnets B (29) respectively arranged on both sides of the top end of the suction seat B (27) and arranged opposite to the magnets A (28). The upper end of the guide air hole A (25) is communicated with the air pipe (21). The guide air pipe (26) is fixedly connected to the suction seat B (27). The guide air pipe (26) penetrates through the suction seat B (27) and its lower end is communicated with the suction cup (22). The polarities of the magnets A (28) are opposite to those of the opposite magnets B (29) and they are in contact with each other.

3. The lightning protection grounding test device for the blades of a wind turbine generator based on an unmanned aerial vehicle according to claim 2, wherein: A guide frame (30) is arranged below the unmanned aerial vehicle (1). A guide pulley (31) is arranged on the guide frame (30). The wire (2) is arranged on the guide pulley (31).

4. The lightning protection grounding test device for the blades of a wind turbine generator based on an unmanned aerial vehicle according to claim 3, characterized in that: A protective cover (32) is fixedly arranged on the unmanned aerial vehicle (1). The protective cover (32) is located at the edge of the wing.

5. The lightning protection grounding test device for the blade of a wind turbine generator based on an unmanned aerial vehicle according to claim 4, characterized in that: A camera (33) and a pneumatic grinding machine (34) are further arranged at the bottom end of the telescopic arm (5). The pneumatic grinding machine (34) is communicated with the vacuum generator (20). The camera (33) is signal-connected to the controller.

6. The lightning protection grounding test device for the blade of a wind turbine generator based on an unmanned aerial vehicle according to claim 5, wherein: A foldable landing gear (35) is arranged at the lower end of the unmanned aerial vehicle (1).

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