An unmanned aerial vehicle based fan blade conductive test device and test method

Abstract

The application relates to a fan blade conduction test device and a test method based on a UAV, and belongs to the technical field of wind power generation equipment. The test device comprises a UAV, a test device main body and a test execution assembly. The test execution assembly is mounted on the UAV and connected with the test device main body through a cable. The test execution assembly comprises a connecting pipe and a polishing pipe. The end of the connecting pipe is in plug-in cooperation with the end of the polishing pipe. The other end of the polishing pipe can be in plug-in cooperation with a lightning arrester on a fan blade. The connecting pipe is internally provided with a conductive block capable of abutting against the lightning arrester. The conductive block is in conduction with the cable on the test device main body. A remote-controllable driving unit and a clamping unit are further mounted on the UAV. The driving unit is used for driving the polishing pipe to rotate relative to the connecting pipe, so that the polishing of an oxide layer on the lightning arrester is realized. The clamping unit is used for realizing the connection between the connecting pipe and the UAV. The application has the effects of shortening the hovering time of the UAV and improving the test efficiency.

Description

Technical Field

[0001] This application relates to the field of wind power generation equipment, and in particular to a wind turbine blade continuity testing device and testing method based on a drone. Background Technology

[0002] Wind power generation is one of the main ways to convert wind power into electricity. Since wind turbine blades are usually made of composite materials (such as glass fiber or carbon fiber), they do not have electrical conductivity. Therefore, if the pre-designed lightning protection path cannot be used due to breakage or corrosion, the blades are prone to being damaged by lightning. Therefore, it is necessary to conduct continuity tests on wind turbine blades regularly.

[0003] Continuity testing typically requires connecting the cables on the testing instrument to the lightning arresters at various locations such as the end and middle of the wind turbine blade, while the other end of the cables is connected to the grounding system. This creates a path between the lightning arresters and the testing instrument, allowing the measurement of the resistance values ​​of the lightning arresters at various locations within the lightning protection path inside the wind turbine blade, and determining whether they meet the requirements.

[0004] In existing technologies, to avoid the dangers of manual operation, continuity testing is typically performed using drones to connect cables to lightning arresters. Specifically, a drone equipped with a robotic arm polishes the lightning arrester before connecting the cable to the arrester, removing its surface oxide layer to ensure the accuracy of subsequent test results. The cable is then connected to the arrester to perform the continuity test. However, this approach involves separate polishing and connection processes, and the drone needs to remain airborne during the continuity test to maintain the connection between the robotic arm and the arrester. Therefore, the drone's airborne time is relatively long in a single continuity test, resulting in a smaller number of blades that can be tested per unit of flight time, leading to low efficiency. Summary of the Invention

[0005] In order to shorten the flight time of the UAV in a single conduction test and thus improve the test efficiency, this application provides a wind turbine blade conduction test device based on a UAV.

[0006] The wind turbine blade continuity testing device based on a drone provided in this application adopts the following technical solution: The system includes a drone, a main testing device, and a testing execution component. The testing execution component is mounted on the drone and connected to the main testing device via cables. The testing execution component includes a connecting tube and a grinding tube. The end of the connecting tube and the end of the grinding tube are inserted into each other, and the other end of the grinding tube can be inserted into the lightning arrester on the wind turbine blade. The connecting tube has a built-in conductive block that can abut against the lightning arrester. The conductive block is connected to the cables on the main testing device. The drone is also equipped with a remotely controlled drive unit and a clamping unit. The drive unit is used to drive the grinding tube to rotate relative to the connecting tube to achieve the grinding of the oxide layer on the lightning arrester. The clamping unit is used to control whether the connecting tube is connected to the drone.

[0007] By adopting the above technical solution, when the UAV, carrying the connecting pipe and the polishing tube on the connecting pipe, flies to the lightning arrester on the blade and prepares to connect the conductive block to the lightning arrester, the drive unit is remotely activated to make the polishing tube rotate relative to the connecting pipe. During the connection process, the polishing tube polishes the oxide layer on the side wall of the lightning arrester until the polished part of the lightning arrester enters the connecting pipe and abuts against the conductive block inside the connecting pipe. Then, a continuity test can be performed. During the continuity test, the clamping unit is remotely released from the connecting pipe, and the UAV can fly back. In the whole process, the UAV only needs to complete the connection between the connecting pipe and the lightning arrester, without having to stay in the air for a long time to wait for the power-on test to be completed. Afterwards, the UAV can retrieve the connecting pipe from the lightning arrester to perform a continuity test on the next wind turbine blade. This reduces the UAV's flight time and improves the efficiency of continuity testing within a fixed flight time.

[0008] Optionally, the clamping unit includes a connecting seat, a first driving member, and clamping blocks. The connecting seat is disposed on the UAV. There are two first driving members arranged opposite to each other. The number of clamping blocks corresponds one-to-one with the number of first driving members. The clamping blocks are disposed on the first driving members, and a clamping space for clamping the connecting tube is formed between the two clamping blocks. The driving unit is disposed on the connecting seat for driving the grinding tube to rotate relative to the connecting tube.

[0009] By adopting the above technical solution, when the two opposing first driving components drive the clamping blocks to move closer to each other, the connecting pipe can be clamped; when the two first driving components drive the clamping blocks to move away from each other, the clamping of the connecting pipe can be released. This allows the UAV to detach from the connection with the connecting pipe at high altitude and return to base during the conduction test, reducing the loss of its internal power source.

[0010] Optionally, the drive unit includes a second drive member and a drive wheel disposed on the second drive member. The second drive member is disposed on a connecting seat, and the drive wheel abuts against the outer wall of the grinding tube.

[0011] By adopting the above technical solution, after the second driving component is started, the driving wheel can drive the grinding tube to rotate relative to the connecting tube. This allows the grinding tube to grind the oxide layer on the lightning arrester as it is inserted into the lightning arrester and moves along its axis, making the data in the subsequent continuity test more accurate and achieving the effect of improving the test quality.

[0012] Optionally, the outer wall of the grinding tube is circumferentially spaced with multiple first transmission parts, and the outer wall of the drive wheel is circumferentially spaced with multiple second transmission parts, wherein the first transmission parts can mesh with the second transmission parts.

[0013] By adopting the above technical solution, the meshing between the first transmission part and the second transmission part enables the drive wheel to smoothly drive the grinding tube to rotate relative to the connecting tube when it rotates. At the same time, due to the meshing between the first transmission part and the second transmission part, the drive wheel will not easily slip relative to the grinding tube when it rotates, thus improving the transmission stability.

[0014] Optionally, a guide surface is provided at the end of the first transmission unit near the connecting pipe, and the distance between the guide surfaces on two adjacent first transmission units gradually decreases from the end near the connecting pipe toward the direction away from the connecting pipe.

[0015] By adopting the above technical solution, since the connecting pipe needs to be re-clamped after the UAV returns, a guide surface is provided on the first transmission part in order to enable the drive wheel to smoothly dock with the connecting and grinding pipe during the clamping process. This prevents the second transmission part on the drive wheel from easily interfering with the first transmission part when it enters the two adjacent first transmission parts vertically.

[0016] Optionally, two sets of limiting rods are hinged to the outer wall of the connecting tube by a torsion spring and mirror-distributed with the axis of the connecting tube as the axis of symmetry. The limiting rods swing relative to the connecting tube by the abutment of the clamping block. When the clamping block no longer abuts the limiting rods, both limiting rods abut against the lightning arrester, and the distance between the two limiting rods gradually increases from the direction of the connecting tube to the grinding tube.

[0017] By adopting the above technical solution, and by setting insulated limiting rods on the connecting pipe, when the connecting pipe is clamped, the two limiting rods can maintain a state where their length is parallel to the axis of the connecting pipe due to the abutment of the clamping block. This allows the connecting pipe to be smoothly inserted and fitted into the lightning arrester. When the drone flies back, under the action of the torsion spring, the end of the limiting rod always abuts against the side wall of the lightning arrester, thereby reducing the probability of the connecting pipe falling off the lightning arrester under its own weight and the weight of the cable, thus achieving the effect of ensuring the stability of the continuity test.

[0018] Optionally, the grinding tube includes a tube body, a connector, and a grinding part. The connector has a protrusion, and the inner wall of the end of the connecting tube has an annular groove that matches the protrusion. When the connector is inserted into the end of the connecting tube, the protrusion is located in the annular groove. The grinding part is located on the inner wall of the tube body, and the first transmission part is located on the outer wall of the tube body.

[0019] By adopting the above technical solution, when the grinding tube and the connecting tube are inserted and mated, the protrusion on the insertion part engages with the annular groove inside the connecting tube. This prevents the insertion and mating between the grinding tube and the connecting tube from easily breaking. The surface of the grinding part that abuts against the outer wall of the lightning arrester is flush with the inner wall of the connecting tube. This allows the lightning arrester, after being ground by the grinding part, to smoothly enter the connecting tube and abut against the conductive block, thus achieving a continuity test.

[0020] Optionally, the grinding section is provided with a chip removal groove whose extension direction is consistent with the length direction of the tube body, the inner wall of the connecting tube is provided with a through groove that can communicate with the chip removal groove, and an air inlet pipe is provided on the connecting tube at the position corresponding to the through groove.

[0021] By adopting the above technical solution, the oxide layer debris ground off the grinding section can enter the chip removal groove as the grinding tube rotates. As the grinding tube rotates, the airflow enters the chip removal groove through the through groove, thereby blowing out the oxide layer debris in the chip removal groove, reducing the probability of oxide layer debris adhering to the lightning detector and causing the detection results to be distorted.

[0022] Optionally, the conductive block is provided with an insulating part and a conductive part. The insulating part is used to abut against the tip of the lightning arrester, and the conductive part is used to abut against the side wall of the lightning arrester that has been polished by the polishing tube.

[0023] By adopting the above technical solution, the insulating part is used to contact the part of the lightning arrester that has not been polished by the polishing tube, while the conductive part contacts the part of the lightning arrester that has been polished by the polishing tube, which plays a role in improving the measurement accuracy.

[0024] On the other hand, this application also provides a method for conducting continuity tests on wind turbine blades based on unmanned aerial vehicles (UAVs), which employs the aforementioned UAV-based wind turbine blade continuity testing device and includes the following steps: S100: Stop the rotation of the fan blades and lock their position; S200: The connecting pipe is fixed by the clamping unit on the drone. At the same time, the drone is taken off and flies towards the lightning arrester at the tip of the wind turbine blade. S300: Corrects the attitude and position of the drone so that the grinding tube and the lightning arrester are aligned as much as possible; S400: Connects the lightning arrester and the polishing tube, and simultaneously remotely starts the drive unit to drive the polishing tube to rotate relative to the connecting tube, polishing the oxide layer on the lightning arrester before it comes into contact with the conductive block. S500: After the lightning arrester comes into contact with the conductive block, the polishing tube and the connecting tube are inserted and matched with the lightning arrester. Release the clamp on the connecting tube, the drone flies back, and after the continuity test is completed, use the drone to remove the connecting tube and the polishing tube from the lightning arrester.

[0025] In summary, this application includes at least the following beneficial technical effects: 1. This application, by setting a grinding tube on the connecting pipe and a drive unit on the drone to drive the grinding tube to rotate, enables the grinding tube to grind the oxide layer on the lightning arrester during the connection process between the connecting pipe and the lightning arrester without step-by-step operation. Furthermore, the connection between the drone and the connecting pipe can be disconnected by the clamping unit, allowing the drone to return to its home position during the continuity test. By shortening the drone's loiter time, the energy consumption of the drone flight is reduced, enabling the drone to perform continuity tests on more blades within a unit of flight time, thereby improving the testing efficiency.

[0026] 2. By installing insulated limiting rods on the connecting pipe, when the connecting pipe is clamped, the two limiting rods can maintain a parallel length to the axis of the connecting pipe due to the abutment of the clamping block. This allows the connecting pipe to be smoothly inserted and fitted into the lightning arrester. When the drone flies back, under the action of the torsion spring, the end of the limiting rod always abuts against the side wall of the lightning arrester, thereby reducing the probability of the connecting pipe falling off the lightning arrester under its own weight and the weight of the cable, thus achieving the effect of ensuring the stability of the continuity test. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a wind turbine blade continuity testing device based on an unmanned aerial vehicle (UAV) according to Embodiment 1 of this application; Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure from another perspective; Figure 3 yes Figure 2 A three-dimensional structural diagram of the connecting tube and the grinding tube (the upper limit rod of the connecting tube is not clamped by the clamping block at this time). Figure 4 hour Figure 3 Schematic diagram of the internal structure of the connecting pipe; Figure 5 This is a schematic diagram of the structure after the grinding tube is installed on the connecting tube and inserted into the lightning arrester (at this time, the limit rod swings to the state after being clamped by the clamping block). Figure 6 This is a flowchart illustrating a method for conducting wind turbine blade continuity tests based on a drone, as described in Embodiment 2 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. UAV; 2. Main body of the test device; 3. Test execution component; 4. Connecting pipe; 5. Grinding pipe; 6. Conductive block; 7. Drive unit; 8. Clamping unit; 9. Connecting seat; 10. First drive component; 11. Clamping block; 12. Second drive component; 13. Drive wheel; 14. First transmission part; 15. Second transmission part; 16. Guide surface; 17. Limiting rod; 18. Pipe body; 19. Insertion part; 20. Grinding part; 21. Chip removal groove; 22. Through groove; 23. Air inlet pipe; 24. Insulation part; 25. Conducting part; 26. Protrusion; 27. Annular groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] Example 1 This application discloses a wind turbine blade continuity testing device based on a drone, referring to... Figures 1-5 The device includes a drone 1, a test device body 2, and a test execution component 3 mounted on the drone 1 and connected to the test device body 2 via a cable. The test execution component 3 includes a connecting pipe 4 and a grinding pipe 5 coaxially inserted into the end of the connecting pipe 4. The drone 1 is equipped with a remotely controlled clamping unit 8 and a drive unit 7 that drives the grinding pipe 5 to rotate on the connecting pipe 4 with the axis of the connecting pipe 4 as the rotation axis.

[0031] The clamping unit 8 includes a connecting seat 9, a first driving member 10, and clamping blocks 11. The connecting seat 9 is fixed below the drone 1 by bolts, and the first driving member 10 is an electric push rod. The first driving member 10 obtains power from the drone 1 to push the clamping blocks 11. There are two first driving members 10, which are arranged opposite each other on the connecting seat 9. Correspondingly, there are also two clamping blocks 11, which are installed on different first driving members 10. On the opposite side of the two clamping blocks 11, there is a groove that can fit with the outer wall of the connecting pipe 4. This allows the two clamping blocks 11 to clamp the connecting pipe 4 when the two first driving members 10 are started simultaneously and move the two clamping blocks 11 closer to each other, thereby realizing the connection between the connecting pipe 4 and the drone 1. When the two first driving members 10 move the clamping blocks 11 away from each other, the connection between the connecting pipe 4 and the drone 1 is disconnected.

[0032] The grinding tube 5 includes a connector 19, a tube body 18, and a grinding part 20. The outer wall of the connector 19 is provided with a protrusion, and the inner wall of the end where the connecting tube 4 and the grinding tube 5 are inserted is provided with an annular groove 27. After the connector 19 and the connecting tube 4 are inserted, the protrusion is located in the annular groove 27, which prevents the tube body 18 from easily detaching from the connecting tube 4 along the axial direction of the connecting tube 4. It is worth mentioning that both the tube body 18 and the connector 19 are made of plastic, which allows the connector 19 to have slight deformation, thus facilitating the insertion of the connector 19 with the protrusion into the connecting tube 4. The grinding part 20 is located on the inner wall of the tube body 18 away from the connecting tube 4, which allows the grinding part 20 to grind the side wall of the lightning arrester along the axial direction when the tube body 18 is inserted into the lightning arrester.

[0033] To improve the polishing quality, a drive unit 7 is provided on the connecting seat 9. The drive unit 7 includes a second drive component 12 and a drive wheel 13. The second drive component 12 is a small stepper motor. The output shaft of the second drive component 12 is connected to the drive wheel 13 to drive the drive wheel 13 to rotate. On the outer wall of the tube body 18, there is a first transmission part 14 in the shape of a protrusion 26 extending along its axial direction. Multiple first transmission parts 14 are provided and distributed circumferentially along the outer wall of the tube body 18. On the outer wall of the drive wheel 13, there are multiple second transmission parts 15 extending in a direction parallel to the first transmission parts 14. The first transmission parts 14 and the second transmission parts 15 mesh with each other to form a gear-like structure. This allows the polishing tube 5 to rotate relative to the connecting tube 4 under the action of the drive wheel 13 when the second drive component 12 is started. This increases the circumferential rotation of the polishing tube 5 during the insertion of the lightning arrester and the polishing tube 5, thereby improving the polishing quality.

[0034] Furthermore, guide surfaces 16 are provided on both sides of the end of the first transmission part 14. The distance between the two opposing guide surfaces 16 on the two adjacent first transmission parts 14 gradually decreases from the direction closer to the connecting pipe 4 to the direction farther away from the connecting pipe 4. This ensures that when the UAV 1 flies back and needs to re-clamp the connecting pipe 4, the second transmission part 15 on the drive wheel 13 will not easily interfere with the first transmission part 14 when it enters the two adjacent first transmission parts 14 along the axial direction.

[0035] In addition, it should be noted that a chip removal groove 21 extending in the same direction as the length of the tube 18 should be provided at the grinding section 20. Multiple chip removal grooves 21 are provided and distributed circumferentially at the grinding section 20. This allows the oxide scale debris after grinding to enter the chip removal groove 21 and not easily enter the connecting tube 4, which would reduce the accuracy of subsequent tests. In this embodiment, the grinding section 20 is provided with fine sandpaper by adhesive bonding, and the fine sandpaper part should be located in the chip removal groove 21 so that the oxide layer debris can be discharged.

[0036] Furthermore, a through groove 22 is provided on the connecting pipe 4, which can communicate with any chip removal groove 21, and an air inlet pipe 23 is provided on the connecting pipe 4, which connects to the through groove 22. This allows external air to be delivered into the through groove 22 and then blown to the chip removal groove 21, thereby discharging the oxide layer debris from the pipe body 18.

[0037] It is worth mentioning that the intake pipe 23 can be fixed by binding it to the cable with cable ties, thereby reducing the probability of poor air intake performance caused by the intake pipe 23 getting tangled with the cable.

[0038] Furthermore, at the positions corresponding to the two clamping blocks 11 on the connecting tube 4, there are insulated limiting rods 17 hinged by torsion springs. The limiting rods 17 are hinged to the side wall of the connecting tube 4 by torsion springs. When the connecting tube 4 is not clamped, the end of the limiting rod 17 does not abut against the clamping block 11, while the other end of the limiting rod 17 is located inside the connecting tube 4. At this time, the distance between the two limiting rods 17 gradually increases from the connecting tube 4 toward the grinding tube 5. This ensures that when the drone 1 flies back, the limiting rod 17 can always abut against the side wall of the lightning arrester under the action of the torsion spring, so that the connection between the connecting tube 4 and the lightning arrester will not easily fail. When the drone 1 needs to reconnect to the connecting tube 4, under the abutment action of the clamping block 11, the limiting rod 17 swings relative to the connecting rod, so that the limiting rod 17 is in a state parallel to the axis of the connecting tube 4, so that the connecting tube 4 can be smoothly pulled out from the lightning arrester.

[0039] Furthermore, a rubber anti-slip layer can be provided on the end of the limiting rod 17 that abuts against the lightning arrester. The anti-slip layer increases the friction between the lightning arrester and the limiting rod 17, thereby improving the abutment stability between the limiting rod 17 and the lightning arrester.

[0040] A conductive block 6 is also fixedly installed inside the connecting tube 4. The conductive block 6 is connected to the cable on the main body 2 of the test device. The conductive block 6 is a cylindrical copper block with a groove inside. An insulating part 24 and a conductive part 25 are provided in the groove on the conductive block 6. An insulating layer is provided on the outside of the groove where the insulating part 24 is located. When the lightning arrester is inserted into the conductive block 6, the unpolished tip of the lightning arrester is inserted into the insulating part 24, while the part polished by the polishing tube 5 is in contact with the conductive part 25. It is worth noting that the inner wall of the groove on the conductive block 6 should be flush with the inner wall of the connecting tube 4. This allows the conductive part 25 to smoothly contact the polished side wall of the lightning arrester, thereby performing a continuity test.

[0041] It should be noted that in Embodiment 1 of this application, the drone 1 should also be equipped with a nozzle capable of spraying conductive and anti-corrosion coatings, such as graphene conductive paint, onto the lightning arrester, as well as a container (not shown in the figure) capable of holding at least enough for one spraying volume. This is used to protect the polished part of the lightning arrester after the continuity test is completed. Since the drone 1 is equipped with a robotic arm to perform continuity tests, it also needs to polish and spray paint. This is prior art, so it will not be described in detail.

[0042] It should be noted that in Embodiment 1 of this application, both the grinding tube 5 and the connecting tube 4 are made of insulating materials, such as PVC. After the lightning arrester passes through the grinding tube 5 and the connecting tube 4, it should only be connected to the conductive part 25 on the conductive block 6.

[0043] The implementation principle of Embodiment 1 of this application is as follows: After the position of the wind turbine blade is locked, the pilot operates the drone 1 to fly to the position of the lightning arrester on the blade, carrying the connecting pipe 4 and the grinding pipe 5. At the same time, the attitude of the drone 1 is adjusted so that the grinding pipe 5 on the drone 1 can be as coaxial as possible with the lightning arrester. When the grinding pipe 5 and the lightning arrester are about to be connected, the second drive component 12 is activated by remote control. At this time, the grinding pipe 5 rotates relative to the connecting pipe 4, and the drone 1 continues to push the grinding pipe 5 so that the grinding pipe 5 grinds the side wall of the lightning arrester.

[0044] After the grinding tube 5 moves to the correct position, the ground part of the lightning arrester enters the connecting tube 4 and abuts against the conductive part 25 of the conductive block 6. Then, the first driving member 10 is driven to release the clamp on the connecting tube 4 by remote control. The limiting rod 17 swings towards the lightning arrester under the action of the torsion spring and abuts against its side wall. At this time, the drone 1 flies back, and the continuity test can be performed.

[0045] After the continuity test is completed, the drone 1 takes off again and uses remote control to make the first drive component 10 push the clamping block 11 against the limit rod 17, so that the connecting pipe 4 can be smoothly removed from the lightning arrester. Then, conductive anti-corrosion coating is sprayed onto the polished part of the lightning arrester to complete one continuity test. The above steps are repeated until all blades of the current wind turbine have completed the continuity test.

[0046] Example 2 Embodiment 2 of this application also provides a method for testing the continuity of wind turbine blades based on a drone 1, which adopts a wind turbine blade continuity testing device based on a drone 1 as described in Embodiment 1 above, and includes the following steps: S100: Stop the rotation of the fan blades and lock their position; S200: The connecting pipe 4 is fixed by the clamping unit 8 mounted on the UAV 1. At the same time, the UAV 1 is operated to take off and fly towards the lightning arrester at the tip of the wind turbine blade. S300: Corrects the attitude and position of UAV 1 so that the grinding tube 5 and the lightning arrester are aligned as much as possible; S400: Connect the lightning arrester and the polishing tube 5, and simultaneously remotely start the drive unit 7 to drive the polishing tube 5 to rotate relative to the connecting tube 4, and polish the oxide layer on the lightning arrester before the lightning arrester and the conductive block 6 come into contact. S500: After the lightning arrester comes into contact with the conductive block 6, the polishing tube 5 and the connecting tube 4 are both inserted into the lightning arrester. The clamp on the connecting tube 4 is released, the drone 1 flies back, and after the continuity test is completed, the drone 1 is used to remove the connecting tube 4 and the polishing tube 5 from the lightning arrester.

[0047] In this method, the centering and correction operation in step S300 can be performed by transmitting the relative position of the positioning point and the outline of the lightning arrester back to the ground control terminal in real time through the image acquisition module on the UAV 1. The pilot can then fine-tune the position of the UAV 1 based on the real-time image transmitted back. This is existing technology and will not be described in detail here.

[0048] By using the above method, the time required for drone 1 to remain airborne can be shortened in a single conduction test by simultaneously performing polishing and docking and by having drone 1 fly back, thus achieving the effect of saving drone 1's range.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wind turbine blade continuity testing device based on a drone, comprising a drone (1), a testing device body (2), and a testing execution component (3), wherein the testing execution component (3) is mounted on the drone (1) and connected to the testing device body (2) via a cable, characterized in that: The test execution component (3) includes a connecting tube (4) and a grinding tube (5). The end of the connecting tube (4) is inserted into the end of the grinding tube (5). The other end of the grinding tube (5) can be inserted into the lightning rod on the wind turbine blade. The connecting tube (4) has a built-in conductive block (6) that can abut against the lightning rod. The conductive block (6) is connected to the cable on the main body (2) of the test device. The drone (1) is also equipped with a remotely controlled drive unit (7) and a clamping unit (8). The drive unit (7) is used to drive the grinding tube (5) to rotate relative to the connecting tube (4) to achieve grinding on the lightning rod. The clamping unit (8) is used to determine whether the connecting tube (4) is connected to the drone (1).

2. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 1, characterized in that: The clamping unit (8) includes a connecting seat (9), a first driving member (10), and clamping blocks (11). The connecting seat (9) is disposed on the UAV (1). There are two first driving members (10) arranged opposite to each other. The number of clamping blocks (11) corresponds one-to-one with the number of first driving members (10). The clamping blocks (11) are disposed on the first driving members (10). A clamping space for clamping the connecting tube (4) is formed between the two clamping blocks (11). The driving unit (7) is disposed on the connecting seat (9) for driving the grinding tube (5) to rotate relative to the connecting tube (4).

3. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 2, characterized in that: The drive unit (7) includes a second drive member (12) and a drive wheel (13) disposed on the second drive member (12). The second drive member (12) is disposed on the connecting seat (9), and the drive wheel (13) abuts against the outer wall of the grinding tube (5).

4. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 3, characterized in that: The outer wall of the grinding tube (5) is circumferentially arranged with a plurality of first transmission parts (14), and the outer wall of the drive wheel (13) is circumferentially arranged with a plurality of second transmission parts (15). The first transmission parts (14) can mesh with the second transmission parts (15).

5. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 4, characterized in that: The first transmission part (14) is provided with a guide surface (16) at one end near the connecting pipe (4), and the distance between the guide surfaces (16) on two adjacent first transmission parts (14) gradually decreases from the end near the connecting pipe (4) toward the direction away from the connecting pipe (4).

6. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 2, characterized in that: Two sets of insulated limiting rods (17) are hinged to the outer wall of the connecting tube (4) by a torsion spring and mirrored with the axis of the connecting tube (4) as the axis of symmetry. The limiting rods (17) swing relative to the connecting tube (4) by the abutment of the clamping block (11). When the clamping block (11) no longer abuts the limiting rods (17), both limiting rods (17) abut against the lightning arrester, and the distance between the two limiting rods (17) gradually increases from the connecting tube (4) to the grinding tube (5).

7. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 4, characterized in that: The grinding tube (5) includes a tube body (18), a plug part (19), and a grinding part (20). The plug part (19) is provided with a protrusion (26). The inner wall of the end of the connecting tube (4) is provided with an annular groove (27) that matches the protrusion (26). When the plug part (19) is plugged into the connecting tube (4), the protrusion (26) is located in the annular groove (27). The grinding part (20) is provided on the inner wall of the tube body (18), and the first transmission part (14) is provided on the outer wall of the tube body (18).

8. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 7, characterized in that: The grinding section (20) is provided with a chip removal groove (21) whose extension direction is consistent with the length direction of the tube body (18). The inner wall of the connecting pipe (4) is provided with a through groove (22) that can communicate with the chip removal groove (21). An air inlet pipe (23) is provided on the connecting pipe (4) at a position corresponding to the through groove (22).

9. The unmanned aerial vehicle-based wind turbine blade continuity testing device according to claim 1, characterized in that: The conductive block (6) is provided with an insulating part (24) and a conductive part (25). The insulating part (24) is used to abut against the tip of the lightning arrester, and the conductive part (25) is used to abut against the side wall of the lightning arrester that has been polished by the polishing tube (5).

10. A method for conducting continuity testing of wind turbine blades based on unmanned aerial vehicles (UAVs), employing the UAV-based wind turbine blade continuity testing device described in any one of claims 1-9, characterized in that... The steps include the following: S100: Stop the rotation of the fan blades and lock their position; S200: The connecting pipe (4) is fixed by the clamping unit (8) mounted on the drone (1). At the same time, the drone (1) is operated to take off and fly towards the lightning arrester at the tip of the wind turbine blade. S300: Correct the attitude and position of the UAV (1) so that the grinding tube (5) and the lightning arrester are aligned as much as possible; S400: Connect the lightning arrester and the polishing tube (5), and simultaneously remotely start the drive unit (7) to drive the polishing tube (5) to rotate relative to the connecting tube (4) and polish the oxide layer on the lightning arrester before the lightning arrester and the conductive block (6) come into contact. S500: After the lightning arrester comes into contact with the conductive block (6), the polishing tube (5) and the connecting tube (4) are both inserted into the lightning arrester. The clamp on the connecting tube (4) is released, the drone (1) flies back, and after the continuity test is completed, the drone (1) is used to remove the connecting tube (4) and the polishing tube (5) from the lightning arrester.

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