Unmanned aerial vehicle fan blade multi-angle grounding resistance detection suspension mechanism

Abstract

The application discloses a kind of unmanned aerial vehicle fan blade multi-angle grounding resistance detection suspension mechanisms, belong to detection technical field.Mainly including unmanned aerial vehicle, the middle position of the unmanned aerial vehicle is provided with mounting bracket, and unmanned aerial vehicle is provided with detection mechanism, while the lower end of mounting bracket is provided with extension rod, and the lower end of extension rod is provided with suspension mechanism, the suspension mechanism includes the winch of being set in the lower end of extension rod, while steel wire is provided on winch.The unmanned aerial vehicle fan blade multi-angle grounding resistance detection suspension mechanism of the application is set by setting detection mechanism and suspension mechanism, reaches the effect that unmanned aerial vehicle can be self-adaptively aligned and stably clamped different angle blade lightning arrester under complex wind condition.

Description

Technical Field

[0001] This application relates to the field of testing technology, specifically a suspension mechanism for detecting the multi-angle grounding resistance of unmanned aerial vehicle (UAV) wind turbine blades. Background Technology

[0002] Large wind turbines are typically installed in open areas, mountainous regions, or offshore areas rich in wind resources. Their blades are key components for capturing wind energy. To protect against lightning strikes, the blade tips are usually equipped with lightning rods (lightning arresters), which conduct the current to the ground via down conductors. Grounding resistance is a crucial parameter for evaluating the performance of a lightning protection system. Excessive resistance can lead to poor discharge of lightning current, causing equipment damage or even fire. Therefore, regularly testing the grounding resistance of the lightning rods on the wind turbine blades is an important maintenance step to ensure the safe operation of wind turbines.

[0003] Currently, the traditional method for detecting the grounding resistance of the lightning arrester on wind turbine blades mainly relies on manual operation. Operators need to use equipment such as elevators and baskets, or directly climb towers that are tens or even hundreds of meters high to get close to the blades located high in the air to make measurements.

[0004] However, this method has significant drawbacks: First, it is extremely unsafe, with high-altitude operations posing a high risk and being greatly affected by wind conditions, seriously threatening the personal safety of workers; second, it is inefficient, with cumbersome preparation work, time-consuming ascent process, and repeated relocation required for inspecting the three blades of a single wind turbine, resulting in a short working window and high costs; third, it is greatly affected by weather, making it impossible to carry out operations in strong winds or rain and snow, which may lead to delays in maintenance plans.

[0005] Therefore, it is necessary to provide a suspension mechanism for detecting the grounding resistance of UAV wind turbine blades at multiple angles to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a suspension mechanism for detecting the grounding resistance of UAV wind turbine blades at multiple angles, which solves the technical problem that UAVs are difficult to stably and accurately connect to lightning arresters at different angles of blades under complex wind conditions, as well as the technical problem that inaccurate measurements and easy damage to equipment caused by shaking.

[0008] The technical solution adopted by this application to solve its technical problem is: a suspension mechanism for detecting the grounding resistance of a UAV wind turbine blade at multiple angles, comprising:

[0009] Drones;

[0010] Mounting bracket, which is positioned in the middle of the drone;

[0011] The testing facility, which is installed on the UAV, is used to hold the lightning rod of the wind turbine blade and measure its grounding resistance.

[0012] An extension rod is provided at the lower end of the mounting bracket;

[0013] A suspension mechanism, disposed at the lower end of the extension rod, is used to adjust the spatial angle of the detection mechanism. The suspension mechanism includes:

[0014] A winch is located at the lower end of the extension rod;

[0015] The steel wire is mounted on the winch.

[0016] Furthermore, the testing institution includes:

[0017] Multiple sets of springs, one end of which is fixed to the mounting bracket;

[0018] A crossbeam, the spring being fixedly connected to the other end of the spring;

[0019] A guide rod, which is fixedly installed between the two sets of crossbeams;

[0020] A clamping plate, which is slidably disposed on the guide rod;

[0021] A transmission mechanism, which is mounted on the crossbeam, is used to drive the clamping plate to move along the guide rod to achieve clamping or releasing actions.

[0022] Furthermore, the transmission mechanism includes a belt and a slide fixed to the belt, the slide being fixedly connected to the clamping plate.

[0023] Furthermore, a copper mesh is provided between the crossbeams.

[0024] Furthermore, a testing platform is provided at the lower end of the crossbeam, and a testing head is provided on the testing platform.

[0025] Furthermore, the upper end of the crossbeam is provided with protective cotton and forms an opening for guiding the lightning arrester in.

[0026] The beneficial effects of this application are: the multi-angle grounding resistance detection suspension mechanism for UAV wind turbine blades provided by this application, by setting up a detection mechanism and a suspension mechanism, achieves the effect of enabling the UAV to adaptively align with and stably clamp the lightning arrester of blades at different angles under complex wind conditions.

[0027] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is an overall schematic diagram of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade according to this application;

[0030] Figure 2 This is a partial schematic diagram of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade according to this application;

[0031] Figure 3 This is a partial explosion diagram of a suspension mechanism for detecting the grounding resistance of a UAV wind turbine blade in this application;

[0032] Figure 4 This is a schematic diagram of the upward detection of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade in this application.

[0033] Figure 5 This is a schematic diagram of the left tilt detection of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade in this application.

[0034] Figure 6 This is a schematic diagram of the left tilt detection of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade in this application.

[0035] Figure 7 This is a schematic diagram of the right tilt detection of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade in this application.

[0036] Figure 8 This is a schematic diagram of the downward detection of a suspension mechanism for detecting the multi-angle grounding resistance of a UAV wind turbine blade in this application.

[0037] The following are the labeling elements in the figure:

[0038] 1. Unmanned Aerial Vehicle (UAV); 2. Mounting Frame; 3. Testing Device; 30. Spring; 31. Crossbeam; 32. Transmission Mechanism; 320. Belt; 321. Slide Table; 33. Guide Rod; 34. Clamping Plate; 35. Copper Mesh; 36. Testing Table; 38. Protective Cotton; 39. Extension Rod; 391. Mounting Plate; 392. Battery Pack; 4. Suspension Mechanism; 40. Winch; 41. Steel Wire. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0041] like Figures 1-3 As shown, this application provides a suspension mechanism for detecting the grounding resistance of wind turbine blades from a drone. This mechanism is mainly used to be installed under the drone to detect the grounding resistance of the lightning arrester on the wind turbine blades through suspension. Specifically, the mechanism includes a drone 1, which is an industrial-grade drone with a wind resistance of not less than 12m / s and integrates a high-precision RTK positioning module and a visual recognition system. It can achieve centimeter-level hovering positioning under complex wind conditions and accurately locate the lightning arrester on the blades through image recognition.

[0042] Example 1:

[0043] In order to test the vertically downward blade lightning arrester, a mounting frame 2 is set in the middle of the body of the UAV 1, and a testing mechanism 3 is set on the mounting frame 2 for directly docking with the blade lightning arrester and measuring its resistance. The testing mechanism 3 includes multiple sets of springs 30 fixedly set on both sides of the mounting frame 2. The other end of the springs 30 is fixedly connected to a crossbeam 31 to provide buffering and self-adaptive capabilities during the testing process, so as to absorb the impact caused by the shaking of the UAV 1 during the docking process and maintain relative stillness with the lightning arrester.

[0044] Furthermore, a guide rod 33 is fixedly installed between the two ends of the two sets of crossbeams 31, and two sets of clamping plates 34 are slidably installed on the guide rod 33. The clamping plates 34 can slide along the guide rod 33 to move closer or further away, thereby achieving the clamping or release of the lightning arrester.

[0045] In order to drive the clamping plate 34 to move, a transmission mechanism 32 is provided between the two sets of crossbeams 31 and on the upper and lower sides of the guide rod 33. The transmission mechanism 32 is a belt slide disclosed in CN205274526U. The transmission mechanism 32 has a belt 320 and a slide 321 fixed on the belt 320. After the transmission mechanism 32 is started, the slide 321 can be driven to reciprocate by driving the belt 320.

[0046] It should be noted that the two sides of the clamping plate 34 are fixedly connected to the two side slides 321 respectively, so that the clamping plate 34 is driven to move along the guide rod 33 through the transmission mechanism 32 to realize the operation of clamping or releasing the lightning arrester.

[0047] Meanwhile, a copper mesh 35 is also provided between the two sets of crossbeams 31. The copper mesh 35 is used to provide a current conduction path when clamping the lightning arrester and forms a dual feedback loop with the detection mechanism to ensure the accuracy of resistance measurement.

[0048] Furthermore, a detection platform 36 is fixedly installed at the lower end of the crossbeam 31. The detection platform 36 is equipped with a detection head (not shown in the figure). The detection head is used to directly contact the lightning arrester and measure the resistance value. The detection head is connected to the data acquisition system of the UAV through a wire to realize real-time data feedback.

[0049] Meanwhile, a protective cotton 38 is provided at the upper end of the crossbeam 31, forming an open structure, which is used to protect the surface of the lightning arrester during docking and prevent scratches or damage.

[0050] When testing is required, the UAV 1, guided by the vision system, first guides the blade tip lightning arrester into the upper opening of the protective cotton 38. At this time, the protective cotton 38 plays a preliminary protective and guiding role to prevent hard contact from damaging the equipment or the blade coating. Once the lightning arrester slides into place, a positioning signal is triggered, and the transmission mechanism 32 is immediately started, driving the two clamping plates 34 to move rapidly towards each other along the guide rod 33, firmly clamping the lightning arrester in the middle.

[0051] While clamping, the lightning arrester makes full contact with the copper mesh 35 in the detection mechanism 3 and the detection head on the detection platform 36. The detection head directly presses against the lightning arrester and passes in the detection current. At this time, the instrument in the detection platform 36 calculates the grounding resistance value by measuring the voltage drop in the circuit. The copper mesh 35 and the clamping mechanism together form a dual feedback mechanism to ensure good current contact and accurate and reliable data.

[0052] After the measurement is completed, the transmission mechanism 32 rotates in reverse, driving the clamping plate 34 to quickly move away from the lightning arrester and release it;

[0053] It should be noted that, in order to provide stable power support and structural extension, an extension rod 39 is fixedly installed at the lower end of the mounting frame 2, and a mounting plate 391 is fixed at the end of the extension rod 39. A battery pack 392 is installed on the mounting plate 391. The battery pack 392 provides an independent power supply for the detection mechanism 3, avoiding the occupation of the main power supply of the UAV 1 and improving the system's endurance and stability.

[0054] Example 2:

[0055] To achieve the ability to perform multi-angle detection on multiple blades, such as Figures 1-8As shown, a suspension mechanism 4 is provided at the lower end of the mounting plate 391. The suspension mechanism 4 includes multiple sets of winches 40 fixedly installed at the lower end of the mounting plate 391. The winches 40 are the winches disclosed in publication number CN212639782U. A steel wire 41 is wound on the winch 40. In this embodiment, the detection mechanism 3 is suspended from the end of the steel wire 41 by a buckle. Thus, by controlling the winch 40 to wind up and unwind the steel wire 41, the pitch and tilt angles of the detection mechanism 3 can be adjusted to adapt to different positions and angles of the blade.

[0056] It should be noted that the suspension mechanism 4, in conjunction with the visual positioning system of the UAV 1, can achieve autonomous docking and release quickly after the inspection is completed, thus avoiding mechanical jamming.

[0057] As the drone 1 flies towards the target blade, the operator or the drone's autonomous system can control the cable winding and unwinding actions of the winch 40 at different positions according to the blade's angle, such as... Figures 5-8 As shown, when the front end of the detection mechanism 3 needs to be tilted downward to match the downward tilt angle of the lightning rod, the front wire 41 is loosened and the rear wire 41 is tightened. Through this differential adjustment, the detection mechanism 3 can produce pitch or even slight rolling motion, so that its opening plane is perfectly matched with the angle of the blade lightning rod.

[0058] When the rear end of the detection mechanism 3 needs to be tilted downward, the rear winch 40 releases the cable, while the front winch 40 retracts the cable. Then the rear steel wire 41 becomes longer, causing the rear end to sink, and the front steel wire 41 becomes shorter, pulling up the front end. This makes the detection mechanism 3 form an upward angle posture with the rear end low and the front end high, which can then be coordinated with the angle of the blade lightning arrester.

[0059] When the detection mechanism 3 needs to roll laterally, differential winding and unwinding can be achieved by controlling the left and right winches 40. Specifically, when the left side needs to be raised, the left steel wire 41 is tightened and the right steel wire 41 is loosened, so as to achieve the rolling adjustment around the longitudinal axis.

[0060] However, in actual operation, firstly, the suspension mechanism 4 adjusts the detection mechanism 3 to the optimal docking posture in advance according to the blade angle identified by the vision system. Then, the drone 1 flies smoothly close, so that the detection mechanism 3 docks with the lightning arrester at the correct angle. The subsequent clamping, measurement, and release process is the same as in Example 1. After the operation is completed, the clamping plate 34 is released, the winch 40 retracts the steel wire 41, and the drone 1 safely withdraws.

[0061] It should be noted that the suspension mechanism 4 eliminates the need for the UAV 1 to make complex and unstable drastic attitude adjustments for docking, allowing it to maintain a basic hover, which greatly reduces the difficulty and risk of operation.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A suspension mechanism for detecting the grounding resistance of a UAV wind turbine blade at multiple angles, characterized in that: include: Unmanned aerial vehicle (1); Mounting bracket (2) is located at the middle 3 position of the UAV (1); The testing mechanism (3) is installed on the UAV (1) for holding the lightning rod of the wind turbine blade and measuring its grounding resistance; An extension rod (39) is provided at the lower end of the mounting bracket (2); A suspension mechanism (4) is disposed at the lower end of the extension rod (39) and is used to adjust the spatial angle of the detection mechanism (3). The suspension mechanism (4) includes: A winch (40) is located at the lower end of the extension rod (39); A steel wire (41) is mounted on the winch (40).

2. The suspension mechanism for detecting the grounding resistance of a UAV wind turbine blades according to claim 1, characterized in that: The testing organization (3) includes: Multiple sets of springs (30), one end of which is fixed to the mounting bracket (2); A crossbeam (31), the spring (30) is fixedly connected to the other end of the spring (30); A guide rod (33) is fixedly disposed between the two sets of crossbeams (31); A clamping plate (34) is slidably disposed on the guide rod (33); A transmission mechanism (32) is provided on the crossbeam (31) for driving the clamping plate (34) to move along the guide rod (33) to achieve clamping or releasing action.

3. The suspension mechanism for detecting the grounding resistance of a UAV wind turbine blades according to claim 2, characterized in that: The transmission mechanism (32) includes a belt (320) and a slide (321) fixed on the belt (320), the slide (321) being fixedly connected to the clamping plate (34).

4. The suspension mechanism for detecting the grounding resistance of a UAV wind turbine blades according to claim 2, characterized in that: A copper mesh (35) is provided between the crossbeams (31).

5. The suspension mechanism for detecting the grounding resistance of a UAV wind turbine blades according to claim 2, characterized in that: A testing platform (36) is provided at the lower end of the crossbeam (31), and a testing head is provided on the testing platform (36).

6. The suspension mechanism for detecting the grounding resistance of a UAV wind turbine blades according to claim 2, characterized in that: The upper end of the crossbeam (31) is provided with protective cotton (38) and forms an opening for guiding the lightning arrester in.

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