Infrared thermal wave wind power blade internal defect detection technology

Abstract

The invention relates to the technical field of wind power blade detection, in particular to an infrared thermal wave wind power blade internal defect detection technology which comprises a detection unmanned aerial vehicle body, a detection assembly is arranged at the bottom of the detection unmanned aerial vehicle body, and the detection assembly comprises a task platform. According to the infrared thermal wave wind power blade internal defect detection technology, a detection assembly is installed, a detection unmanned aerial vehicle body is firstly controlled to move to the top of a wind power blade, then a micro motor I is utilized to drive an adjusting shaft to rotate, and then the detection unmanned aerial vehicle body is controlled to move downwards; at the moment, the pulse flash lamp in the windshield can be used for instantly heating the surface of the blade, meanwhile, the thermal infrared imager is started to record the surface temperature cooling process of the wind power blade, and due to the fact that the heat conductivity of a defect area is poor, the area with the low cooling speed is the defect area; and in the detection process, a detection area can be located in a closed space by utilizing the windproof cover and the fitting pad, so that the detection area is not influenced by external wind, and the detection result is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade detection, specifically to the internal defect detection technology of infrared thermal wave for wind turbine blades. Background Technique

[0002] Wind turbine blades are the core components of wind turbines, responsible for converting the natural wind energy into electrical energy. The design, materials, and manufacturing technology of wind turbine blades directly affect the power generation efficiency and economic benefits of wind turbines. Wind turbine blades usually consist of blade profiles and hubs, and their working principle is based on the principle of aerodynamics. When the wind blows over the blades, different air flow velocities and air pressure distributions are generated on the curved surfaces of the blades, thus generating a forward aerodynamic force on the blades, causing the blades to start rotating. This rotation drives the rotation of the wind turbine rotor, and then generates electrical energy.

[0003] In order to ensure the safety and reliability of the operation of wind turbine blades, it is usually necessary to detect the internal defects of wind turbine blades. Most of the common methods are to detect the inside of wind turbine blades using thermal imaging. However, since thermal imaging detection has high requirements for the environment, it is easily affected by the external wind, and the volume of wind turbine blades is large, making it difficult to transport them to a windless environment for detection, thus easily affecting the detection results. Therefore, it is necessary to provide the internal defect detection technology of infrared thermal wave for wind turbine blades. Summary of the Invention

[0004] The object of the present invention is to provide an infrared thermal wave internal defect detection technology for wind turbine blades, so as to solve the problems raised in the above-mentioned background technology. Since thermal imaging detection has high requirements for the environment, it is easily affected by external wind, and the volume of wind turbine blades is large, making it difficult to transport them to a windless environment for detection, which is likely to affect the detection results. To achieve the above object, the present invention provides the following technical solution: an infrared thermal wave internal defect detection technology for wind turbine blades, including a detection drone body. A detection component is provided at the bottom of the detection drone body. The detection component includes a task platform. The task platform is fixedly connected to the bottom of the detection drone body. A driving motor is fixedly connected to one side of the task platform. The transmission end of the driving motor is fixedly connected to a threaded rod. A limiting groove is opened at the bottom of the task platform. A limiting block is slidably connected to the inner wall of the limiting groove. The threaded rod is threadedly connected to the inside of the limiting block. A connecting plate is fixedly connected to the bottom of the limiting block. A first micro motor is fixedly connected to one side of the connecting plate. The transmission end of the first micro motor is fixedly connected to an adjusting shaft. The adjusting shaft is movably connected to the inside of the connecting plate. A connecting frame is fixedly connected to the side surface of the adjusting shaft. An active block is fixedly connected to the bottom of the connecting frame. An active shaft is movably connected to the inside of the active block. A connecting piece is movably connected to the side surface of the active shaft. A windproof cover is fixedly connected to the bottom of the connecting piece. A fitting pad is fixedly connected to the bottom of the windproof cover. An infrared thermal imager is fixedly connected to the inner wall of the windproof cover. A first electric push rod is fixedly connected to the inner wall of the windproof cover. A pulsed flash lamp is fixedly connected to the bottom of the first electric push rod. By installing the detection component, when detecting the internal defects of the wind turbine blade, the detection drone body can be first controlled to move to the top of the wind turbine blade, and then the first micro motor is used to drive the adjusting shaft to rotate, so that the bottom connecting frame and the windproof cover can be vertically downward. Then, the detection drone body is controlled to move downward until the windproof cover and the fitting pad can be attached to the surface of the wind turbine blade. At this time, the pulsed flash lamp inside the windproof cover can be used to instantaneously heat the surface of the blade, and at the same time, the infrared thermal imager is started to record the cooling process of the surface temperature of the wind turbine blade. Since the heat conductivity of the defect area is poor, the area with a slow cooling speed is the defect area. At the same time, the driving motor is used to drive the threaded rod to rotate, so that the bottom infrared thermal imager can detect an area. And during the detection process, the windproof cover and the fitting pad can make the detection area in a closed space, so it will not be affected by external wind, making the detection result more accurate and improving the practicability of the device.

[0005] Further preferably, a cleaning component is provided at the bottom of the detection UAV body. The cleaning component includes an electric push rod II, which is arranged at the bottom of the detection UAV body. A fixing piece is fixedly connected to the bottom of the electric push rod II. A micro motor II is fixedly connected to the bottom of the fixing piece. The driving end of the micro motor II is fixedly connected to a cleaning disc. A flexible cleaning block is arranged at the bottom of the cleaning disc. By installing the cleaning component, before detecting the wind power blade, the electric push rod II can be used to drive the cleaning disc at the bottom to move downward until the flexible cleaning block fits the surface of the wind power blade. Then, the micro motor II can be used to drive the flexible cleaning block to rotate, so as to clean the surface of the wind power blade. Then, the defect detection can be directly carried out on the cleaned area to ensure that the detected area is free of dirt, avoid the thermal reflection difference caused by surface unevenness, and improve the practicability of the device.

[0006] Further preferably, a reinforcing piece is fixedly connected to the top of the electric push rod II. A connecting rod is fixedly connected to the bottom of the reinforcing piece. The other end of the connecting rod is fixedly connected to a connecting ring, and the connecting ring is fixedly connected to the other side of the task platform.

[0007] Further preferably, a reinforcing ring is fixedly connected to one side of the detection UAV body, and a connecting shaft is fixedly connected to the inner wall of the reinforcing ring.

[0008] Further preferably, the other end of the connecting shaft is fixedly connected to a rotary motor, and the driving end of the rotary motor is fixedly connected to a propeller. By installing the rotary motor, the rotary motor can be used to drive the propeller to rotate, so that lift is generated when the propeller rotates, enabling the detection UAV body to achieve various flight states such as hovering, climbing, descending, turning, and horizontal movement, and improving the practicability of the device.

[0009] Further preferably, a connecting block is fixedly connected to one side of the task platform, and a landing gear is fixedly connected to the other side of the connecting block.

[0010] Further preferably, a support plate is fixedly connected to the other side of the landing gear, and a stabilizing pad is fixedly connected to the bottom of the support plate. By installing the stabilizing pad, when the detection UAV body lands after the flight, the stabilizing pad at the bottom of the landing gear can make the detection UAV body stop more stably, avoiding situations such as tipping over, and improving the practicability of the device.

[0011] Further preferably, a camera is fixedly connected to one side of the detection UAV body, and a machine cover is fixedly connected to the top of the detection UAV body. By installing the camera, during the flight of the detection UAV body, the external environment can be observed in real time by using the camera, avoiding some accidents such as collisions, and improving the practicability of the device.

[0012] Advantages of the present invention compared with the prior art: In the present invention, by installing a detection component, when detecting internal defects of a wind turbine blade, the detection UAV body can be first controlled to move to the top of the wind turbine blade, and then the micro motor 1 drives the adjusting shaft to rotate, so that the bottom connecting frame, wind shield, etc. can be vertically downward. Then, the detection UAV body is controlled to move downward until the wind shield and the fitting pad can fit on the surface of the wind turbine blade. At this time, the pulsed flash lamp inside the wind shield can be used to instantaneously heat the surface of the blade, and the infrared thermal imager is started to record the cooling process of the surface temperature of the wind turbine blade. Since the heat conductivity of the defect area is poor, the area with a slow cooling speed is the defect area. At the same time, the driving motor drives the threaded rod to rotate, so that the bottom infrared thermal imager can detect an area. And during the detection process, the wind shield and the fitting pad can make the detection area in a closed space, so that it will not be affected by the external wind, making the detection result more accurate and improving the practicability of the device.

[0013] In the present invention, by installing a cleaning component, before detecting the wind turbine blade, the electric push rod 2 can be used to drive the cleaning disc at the bottom to move downward until the flexible cleaning block fits on the surface of the wind turbine blade. Then, the micro motor 2 drives the flexible cleaning block to rotate, so that the surface of the wind turbine blade can be cleaned. Then, the defect detection can be directly carried out on the cleaned area to ensure that the detected area is free of dirt, avoid the thermal reflection difference caused by surface unevenness, and improve the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic three-dimensional structure of the present invention Figure 1 ; Figure 2 is a schematic partial three-dimensional structure of the present invention Figure 1 ; Figure 3 is a schematic partial three-dimensional structure of the present invention Figure 2 ; Figure 4 is a schematic partial three-dimensional structure of the present invention Figure 3 ; Figure 5 is a schematic partial three-dimensional structure of the present invention Figure 4 ; Figure 6 is a schematic three-dimensional structure diagram of the present invention.

[0015] In the figure: 1, detection UAV body; 2, detection component; 3, cleaning component; 4, reinforcement ring; 5, connecting shaft; 6, rotating motor; 7, propeller; 8, connecting block; 9, landing gear; 10, support plate; 11, stabilizing pad; 12, camera; 13, machine cover; 201, mission platform; 202, driving motor; 203, threaded rod; 204, limiting groove; 205, limiting block; 206, connecting plate; 207, micro-motor 1; 208, adjusting shaft; 209, connecting frame; 210, movable block; 211, movable shaft; 212, connecting piece; 213, wind shield; 214, fitting pad; 215, infrared thermal imager; 216, electric push rod 1; 217, pulse flash lamp; 301, electric push rod 2; 302, fixing piece; 303, micro-motor 2; 304, cleaning disc; 305, flexible cleaning block; 306, reinforcement piece; 307, connecting rod; 308, connecting ring. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1 - Figure 6, the present invention provides a technical solution: an infrared thermal wave internal defect detection technology for wind turbine blades, including a detection UAV body 1. A detection component 2 is provided at the bottom of the detection UAV body 1. The detection component 2 includes a task platform 201. The task platform 201 is fixedly connected to the bottom of the detection UAV body 1. A driving motor 202 is fixedly connected to one side of the task platform 201. The transmission end of the driving motor 202 is fixedly connected to a threaded rod 203. A limiting groove 204 is formed at the bottom of the task platform 201. A limiting block 205 is slidably connected to the inner wall of the limiting groove 204. The threaded rod 203 is threadedly connected to the inside of the limiting block 205. A connecting plate 206 is fixedly connected to the bottom of the limiting block 205. A first micro motor 207 is fixedly connected to one side of the connecting plate 206. The transmission end of the first micro motor 207 is fixedly connected to an adjusting shaft 208. The adjusting shaft 208 is movably connected to the inside of the connecting plate 206. A connecting frame 209 is fixedly connected to the side surface of the adjusting shaft 208. A movable block 210 is fixedly connected to the bottom of the connecting frame 209. A movable shaft 211 is movably connected to the inside of the movable block 210. A connecting piece 212 is movably connected to the side surface of the movable shaft 211. A windproof cover 213 is fixedly connected to the bottom of the connecting piece 212. A fitting pad 214 is fixedly connected to the bottom of the windproof cover 213. An infrared thermal imager 215 is fixedly connected to the inner wall of the windproof cover 213. An electric push rod 216 is fixedly connected to the inner wall of the windproof cover 213. A pulsed flash lamp 217 is fixedly connected to the bottom of the electric push rod 216. By installing the detection component 2, when detecting the internal defects of the wind turbine blade, the detection UAV body 1 can be first controlled to move to the top of the wind turbine blade, and then the first micro motor 207 is used to drive the adjusting shaft 208 to rotate, so that the bottom connecting frame 209 and the windproof cover 213 can be vertically downward. Then, the detection UAV body 1 is controlled to move downward until the windproof cover 213 and the fitting pad 214 can be attached to the surface of the wind turbine blade. At this time, the pulsed flash lamp 217 inside the windproof cover 213 can be used to instantaneously heat the surface of the blade, and at the same time, the infrared thermal imager 215 is started to record the cooling process of the surface temperature of the wind turbine blade. Since the heat conductivity of the defect area is poor, the area with a slow cooling speed is the defect area. At the same time, the driving motor 202 is used to drive the threaded rod 203 to rotate, so that the bottom infrared thermal imager 215 can detect an area, and during the detection process, the detection area can be in a closed space by using the windproof cover 213 and the fitting pad 214, so as not to be affected by the external wind.

[0018] In this embodiment, as Figure 5As shown in the figure, a cleaning component 3 is provided at the bottom of the detection UAV body 1. The cleaning component 3 includes an electric push rod two 301. The electric push rod two 301 is arranged at the bottom of the detection UAV body 1. A fixing piece 302 is fixedly connected to the bottom of the electric push rod two 301. A micro motor two 303 is fixedly connected to the bottom of the fixing piece 302. A transmission end of the micro motor two 303 is fixedly connected to a cleaning disc 304. A flexible cleaning block 305 is arranged at the bottom of the cleaning disc 304. By installing the cleaning component 3, before detecting the wind power blade, the electric push rod two 301 can be used to drive the cleaning disc 304 at the bottom to move downward until the flexible cleaning block 305 fits the surface of the wind power blade. Then, the micro motor two 303 can be used to drive the flexible cleaning block 305 to rotate, so as to clean the surface of the wind power blade. Then, the defect detection can be directly carried out on the cleaned area to ensure that the detected area is free of dirt.

[0019] In this embodiment, as Figure 5 shown, a reinforcing piece 306 is fixedly connected to the top of the electric push rod two 301. A connecting rod 307 is fixedly connected to the bottom of the reinforcing piece 306. The other end of the connecting rod 307 is fixedly connected to a connecting ring 308. The connecting ring 308 is fixedly connected to the other side of the task platform 201.

[0020] In this embodiment, as Figure 6 shown, a reinforcing ring 4 is fixedly connected to one side of the detection UAV body 1. A connecting shaft 5 is fixedly connected to the inner wall of the reinforcing ring 4.

[0021] In this embodiment, as Figure 6 shown, the other end of the connecting shaft 5 is fixedly connected to a rotating motor 6. A transmission end of the rotating motor 6 is fixedly connected to a propeller 7. By installing the rotating motor 6, the rotating motor 6 can be used to drive the propeller 7 to rotate. Thus, when the propeller 7 rotates, lift is generated, enabling the detection UAV body 1 to achieve various flight states such as hovering, climbing, descending, turning, and horizontal movement.

[0022] In this embodiment, as Figure 1 shown, a connecting block 8 is fixedly connected to one side of the task platform 201. A landing gear 9 is fixedly connected to the other side of the connecting block 8.

[0023] In this embodiment, as Figure 1 shown, a support plate 10 is fixedly connected to the other side of the landing gear 9. A stabilizing pad 11 is fixedly connected to the bottom of the support plate 10. By installing the stabilizing pad 11, when the detection UAV body 1 lands after the flight, the stabilizing pad 11 at the bottom of the landing gear 9 can make the detection UAV body 1 stop more stably.

[0024] In this embodiment, as Figure 1As shown, a camera 12 is fixedly connected to one side of the detection UAV body 1, and a machine cover 13 is fixedly connected to the top of the detection UAV body 1. By installing the camera 12, during the flight of the detection UAV body 1, the external environment can be observed in real time using the camera 12.

[0025] The usage method and advantages of the present invention: The internal defect detection technology of infrared thermal wave for wind turbine blades, when in use, the working process is as follows: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, before detecting the wind turbine blade, the electric push rod two 301 can be used to drive the cleaning plate 304 at the bottom to move downward until the flexible cleaning block 305 fits on the surface of the wind turbine blade. Then, the micro motor two 303 can be used to drive the flexible cleaning block 305 to rotate, so as to clean the surface of the wind turbine blade. Then, the defect detection can be directly carried out on the cleaned area to ensure that the detected area is free of dirt. When detecting the internal defects of the wind turbine blade, the detection UAV body 1 can be first controlled to move to the top of the wind turbine blade, and then the micro motor one 207 can be used to drive the adjusting shaft 208 to rotate, so that the connecting frame 209 and the windproof cover 213 at the bottom can be vertically downward. Then, control the detection UAV body 1 to move downward until the windproof cover 213 and the fitting pad 214 can fit on the surface of the wind turbine blade. At this time, the pulsed flash lamp 217 inside the windproof cover 213 can be used to instantaneously heat the surface of the blade, and at the same time, start the infrared thermal imager 215 to record the cooling process of the surface temperature of the wind turbine blade. Since the thermal conductivity of the defect area is poor, the area with a slow cooling speed is the defect area. At the same time, the driving motor 202 can be used to drive the threaded rod 203 to rotate, so that the infrared thermal imager 215 at the bottom can detect an area. And during the detection process, the windproof cover 213 and the fitting pad 214 can make the detection area in a closed space, so as not to be affected by the external wind. At the same time, the rotating motor 6 can be used to drive the propeller 7 to rotate, so that when the propeller 7 rotates, lift is generated, enabling the detection UAV body 1 to achieve various flight states such as hovering, climbing, descending, turning, and horizontal movement. When the detection UAV body 1 lands after the flight ends, the stable pad 11 at the bottom of the landing gear 9 can make the detection UAV body 1 stop more stably.

[0026] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. Infrared thermal wave wind turbine blade internal defect detection technology, including a detection drone body (1), characterized in that: A detection component (2) is arranged at the bottom of the detection drone body (1), and the detection component (2) comprises a task platform (201), the task platform (201) is fixedly connected to the bottom of the detection drone body (1), a drive motor (202) is fixedly connected to one side of the task platform (201), a threaded rod (203) is fixedly connected to the transmission end of the drive motor (202), a limit groove (204) is provided at the bottom of the task platform (201), a limit block (205) is slidably connected to the inner wall of the limit groove (204), the threaded rod (203) is threadedly connected to the inside of the limit block (205), a connecting plate (206) is fixedly connected to the bottom of the limit block (205), a micro motor 1 (207) is fixedly connected to one side of the connecting plate (206), and the transmission end of the micro motor 1 (207) is fixedly connected to the inner wall of the limit groove (204). An adjusting shaft (208) is connected, the adjusting shaft (208) is movably connected inside the connecting plate (206), the side surface of the adjusting shaft (208) is fixedly connected to a connecting frame (209), the bottom of the connecting frame (209) is fixedly connected to a movable block (210), the inside of the movable block (210) is movably connected to a movable shaft (211), the side surface of the movable shaft (211) is movably connected to a connecting piece (212), the bottom of the connecting piece (212) is fixedly connected to a wind shield (213), the bottom of the wind shield (213) is fixedly connected to a fitting pad (214), the inner wall of the wind shield (213) is fixedly connected to an infrared thermal imager (215), the inner wall of the wind shield (213) is fixedly connected to an electric push rod (216), and the bottom of the electric push rod (216) is fixedly connected to a pulse flash lamp (217).

2. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 1 is characterized by: A cleaning component (3) is arranged at the bottom of the detection drone body (1), and the cleaning component (3) comprises a second electric push rod (301), the second electric push rod (301) is arranged at the bottom of the detection drone body (1), a fixing plate (302) is fixedly connected to the bottom of the second electric push rod (301), a second micro motor (303) is fixedly connected to the bottom of the fixing plate (302), a cleaning disc (304) is fixedly connected to the transmission end of the second micro motor (303), and a flexible cleaning block (305) is arranged at the bottom of the cleaning disc (304).

3. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 2 is characterized by: The top of the second electric push rod (301) is fixedly connected to a reinforcement plate (306), the bottom of the reinforcement plate (306) is fixedly connected to a connecting rod (307), the other end of the connecting rod (307) is fixedly connected to a connecting ring (308), and the connecting ring (308) is fixedly connected to the other side of the task platform (201).

4. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 1 is characterized by: A reinforcement ring (4) is fixedly connected to one side of the detection drone body (1), and a connecting shaft (5) is fixedly connected to the inner wall of the reinforcement ring (4).

5. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 4 is characterized by: The other end of the connecting shaft (5) is fixedly connected to a rotating motor (6), and the transmission end of the rotating motor (6) is fixedly connected to a propeller (7).

6. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 1 is characterized by: A connection block (8) is fixedly connected to one side of the task platform (201), and a landing gear (9) is fixedly connected to the other side of the connection block (8).

7. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 6 is characterized by: A support plate (10) is fixedly connected to the other side of the landing gear (9), and a stabilizing pad (11) is fixedly connected to the bottom of the support plate (10).

8. The infrared thermal wave wind turbine blade internal defect detection technology according to claim 1 is characterized by: A camera (12) is fixedly connected to one side of the detection drone body (1), and a cover (13) is fixedly connected to the top of the detection drone body (1).

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