Visual detection device for wind power blade
Through the wind turbine blade visual detection device, two industrial cameras and software are used to perform real-time calculations, which solves the problem of low detection accuracy and efficiency of wind turbine blades in the existing technology, and achieves blade position measurement with higher accuracy and stability.
Patent Information
- Application Number
- CN202420347097.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The existing methods of spatial displacement detection of wind power blades mainly rely on displacement sensors, and there are problems such as inaccurate measurement, limited measurement range and installation methods affecting accuracy.
Design a visual inspection device for wind turbine blades, which uses two industrial cameras to collect video images in real time and combines it with software to perform real-time calculations for measuring the three-dimensional displacement, deformation, trajectory and attitude of large structures.
It improves the accuracy and work efficiency of spatial position measurement of wind turbine blades, reduces measurement time and labor costs, and enhances the stability of detection.
Smart Images
Figure CN222379011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wind turbine blade detection, in particular to a wind turbine blade visual detection device. Background Art
[0002] Wind power is of great significance in alleviating energy supply, improving energy structure, and protecting the environment. In recent years, wind turbines have been widely installed and used in my country. Since wind turbines are usually located in the wild, the environmental conditions are harsh, and they are prone to failure. Maintenance consumes a lot of manpower and material resources, and the reliability requirements for wind turbines are getting higher and higher. In order to meet the design requirements of stable operation and service life of wind turbine blades at different wind speeds, the blades need to have sufficient static strength to ensure that the blade structure is not damaged under extreme wind loads. For this reason, it is necessary to accurately grasp the blade's extreme load and its response parameters under static load during design, and optimize the blade structure accordingly.
[0003] Existing wind turbine blade spatial displacement detection methods are mainly based on displacement sensors. The displacement electrical signal is converted into length data through a data acquisition device, and then the length data is displayed in a graphical form through a graphic software. After analyzing the graphic, the state of the blade during the test can be judged. Generally, the blade displacement is only detected through a few points on the blade. Each point corresponds to a group of displacement sensors. Each group consists of 3 sensors, representing the three directions of XYZ in space. The spatial displacement of this point is synthesized by the data of the three sensors. However, the existing methods have the following defects:
[0004] 1. The displacement sensor needs to go through a lot of calculations to get the three-dimensional coordinates of the laboratory, and then use a ruler to measure the specific position and then place it. At the same time, a calibration test is required before each use of the sensor, which is time-consuming and laborious. In actual tests, the sensor string often interferes with other signal lines, resulting in inaccurate data measurement.
[0005] 2. The sensor’s measurement range is limited and cannot meet all testing requirements.
[0006] 3. The measurement accuracy of the sensor is greatly affected by the installation method, and the same method may result in installation differences when different personnel install the sensor. Therefore, we propose a wind turbine blade visual inspection device to solve the above problems. Utility Model Content
[0007] The purpose of the utility model is to provide a wind turbine blade visual inspection device to solve the problems raised in the above background technology.
[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0009] A wind turbine blade visual inspection device comprises a first tripod, a second tripod, a calibration device and a carrier plate, wherein an adjustment seat is fixedly mounted on the upper surface of the first tripod, an adjustment groove is provided on the upper surface of the adjustment seat, two adjustment blocks are slidably connected to the inner wall of the adjustment groove, an industrial camera is fixedly mounted on the upper surface of the two adjustment blocks, a control box is fixedly mounted on the bottom surface of the carrier plate, and a computer is placed on the upper surface of the carrier plate.
[0010] As a preferred technical solution of the present application, the inner bottom wall of the adjustment groove is provided with two strip holes, the bottom surfaces of the two adjustment blocks are fixedly connected with two locking screws, and the bottom ends of the two locking screws pass through the strip holes and extend to the bottom of the strip holes.
[0011] As a preferred technical solution of the present application, the outer surfaces of the two locking screws are threadedly connected with locking rings, and the upper surfaces of the two locking rings are in close contact with the bottom surface of the adjustment seat.
[0012] As a preferred technical solution of the present application, a telescopic tube is fixedly installed on the upper surface of the second tripod, a telescopic rod is slidably connected to the inner ring of the telescopic tube, a light source is fixedly installed on the top of the telescopic rod, and a fixing screw is threadedly connected to the inner wall of the telescopic tube.
[0013] As a preferred technical solution of the present application, a base is provided below the calibration device, and two support frames are fixedly mounted on the outer surface of the base, and ends of the two support frames close to each other are fixedly connected to the outer surface of the calibration device.
[0014] As a preferred technical solution of the present application, two supporting legs are provided below the carrier plate, and the upper surfaces of the two supporting legs are fixedly connected to the bottom surface of the carrier plate.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] This device consists of hardware and software. The hardware mainly includes two industrial cameras for real-time acquisition of video images, and the software performs real-time calculations. The system is mainly used for real-time measurement of three-dimensional displacement deformation, trajectory and posture of various large structures. Since the visual inspection device only uses two cameras for detection, multiple measurement points in the test area can be tested synchronously, which greatly improves work efficiency and makes the spatial position measurement of wind turbine blades more accurate and more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the front view of the first tripod in the wind turbine blade visual inspection device.
[0018] Figure 2It is a schematic diagram of the three-dimensional structure of the front view of the second tripod in the wind turbine blade visual inspection device.
[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the bottom view of the adjustment seat in the wind turbine blade visual inspection device.
[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the front view of the calibration device in the wind turbine blade visual inspection device.
[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the bottom view of the carrier plate in the wind turbine blade visual inspection device.
[0022] Figure 6 This is the visual inspection principle diagram of the wind turbine blade visual inspection device.
[0023] In the figure: 1. first tripod; 2. adjustment seat; 3. adjustment slot; 4. adjustment block; 5. industrial camera; 6. bar hole; 7. locking ring; 8. locking screw; 9. second tripod; 10. telescopic tube; 11. telescopic rod; 12. light source; 13. fixing screw; 14. base; 15. support frame; 16. calibration device; 17. carrier plate; 18. support leg; 19. control box; 20. computer. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-6 In the utility model, a wind turbine blade visual inspection device includes a first tripod 1, a second tripod 9, a calibration device 16 and a carrier plate 17. An adjustment seat 2 is fixedly installed on the upper surface of the first tripod 1. An adjustment groove 3 is opened on the upper surface of the adjustment seat 2. Two adjustment blocks 4 are slidably connected to the inner wall of the adjustment groove 3. Industrial cameras 5 are fixedly installed on the upper surfaces of the two adjustment blocks 4. A control box 19 is fixedly installed on the bottom surface of the carrier plate 17. A computer 20 is placed on the upper surface of the carrier plate 17.
[0026] Two strip holes 6 are provided on the inner bottom wall of the adjustment groove 3, and two locking screws 8 are fixedly connected to the bottom surfaces of the two adjustment blocks 4. The bottom ends of the two locking screws 8 pass through the strip holes 6 and extend to the bottom of the strip holes 6. The outer surfaces of the two locking screws 8 are threadedly connected with locking rings 7. The upper surfaces of the two locking rings 7 are in close contact with the bottom surface of the adjustment seat 2. Through the strip holes 6 and the locking screws 8, and in cooperation with the locking rings 7, it is convenient to adjust the distance between the two industrial cameras 5, which will be more flexible in visual inspection of wind turbine blades.
[0027] A telescopic cylinder 10 is fixedly installed on the upper surface of the second tripod 9, and a telescopic rod 11 is slidably connected to the inner ring of the telescopic cylinder 10, and a light source 12 is fixedly installed on the top of the telescopic rod 11. A fixing screw 13 is threadedly connected to the inner wall of the telescopic cylinder 10. A base 14 is provided below the calibration device 16, and two supporting frames 15 are fixedly installed on the outer surface of the base 14. The ends of the two supporting frames 15 that are close to each other are fixedly connected to the outer surface of the calibration device 16. Two supporting legs 18 are provided below the carrier plate 17, and the upper surfaces of the two supporting legs 18 are fixedly connected to the bottom surface of the carrier plate 17. Through the cooperation of the telescopic cylinder 10 and the telescopic rod 11, and with the fixing screw 13, the height of the light source 12 can be adjusted to improve the flexibility when filling light, and the cooperation of the base 14 and the supporting frame 15 can stably support the calibration device 16.
[0028] The working principle of the utility model is: firstly, two industrial cameras 5 are connected to the control box 19 and the computer 20 respectively through the power line and the signal line, and then before the industrial cameras 5 are placed, the field of view size is first determined, and the measuring distance and the distance between the two industrial cameras 5 are determined according to the field of view size. After the industrial cameras 5 are placed in place, the aperture and focal length of the industrial cameras 5 are adjusted so that the industrial cameras 5 can clearly capture the measured target;
[0029] Then the industrial camera 5 is calibrated by the calibration device 16. The specific calibration method is to take eight photos of different positions of the calibration device in the test area, and then calibrate the internal parameters in the computer 20. After completion, the target within the test range can be identified, and all the internal and external structural parameters of the two industrial cameras 5 can be calculated by using the software algorithm to correctly calculate the coordinates of the measurement points;
[0030] Then find at least 18 target points in the test area. Before the test, you need to post multiple targets within the test area. The target is a figure with an inner circle and an outer square, with the circle being white and the square being black. Use the industrial camera 5 to find and identify 18 such targets within the test range. Select two of the 18 identified targets, measure the distance between the two targets with a ruler and input it into the visual software to complete the calibration of the external reference. After the above three steps, the visual inspection device is configured, and the position of the wind turbine blade can be measured within the test range. Pay special attention to posting the target at the position that needs to be inspected, and be sure to keep the surface of the target flat, otherwise it will affect the accuracy of the test.
[0031] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A wind turbine blade visual inspection device, characterized in that: The device comprises a first tripod (1), a second tripod (9), a calibration device (16) and a carrier plate (17); an adjustment seat (2) is fixedly mounted on the upper surface of the first tripod (1); an adjustment groove (3) is provided on the upper surface of the adjustment seat (2); two adjustment blocks (4) are slidably connected to the inner wall of the adjustment groove (3); an industrial camera (5) is fixedly mounted on the upper surface of the two adjustment blocks (4); a control box (19) is fixedly mounted on the bottom surface of the carrier plate (17); and a computer (20) is placed on the upper surface of the carrier plate (17).
2. A wind turbine blade visual inspection device according to claim 1, characterized in that: The inner bottom wall of the adjustment groove (3) is provided with two strip-shaped holes (6), the bottom surfaces of the two adjustment blocks (4) are fixedly connected with two locking screws (8), and the bottom ends of the two locking screws (8) pass through the strip-shaped holes (6) and extend to the bottom of the strip-shaped holes (6).
3. A wind turbine blade visual inspection device according to claim 2, characterized in that: The outer surfaces of the two locking screws (8) are both threadedly connected with locking rings (7), and the upper surfaces of the two locking rings (7) are in close contact with the bottom surface of the adjustment seat (2).
4. A wind turbine blade visual inspection device according to claim 1, characterized in that: A telescopic cylinder (10) is fixedly mounted on the upper surface of the second tripod (9); a telescopic rod (11) is slidably connected to the inner ring of the telescopic cylinder (10); a light source (12) is fixedly mounted on the top of the telescopic rod (11); and a fixing screw (13) is threadedly connected to the inner wall of the telescopic cylinder (10).
5. A wind turbine blade visual inspection device according to claim 1, characterized in that: A base (14) is provided below the calibration device (16), and two support frames (15) are fixedly mounted on the outer surface of the base (14), and ends of the two support frames (15) that are close to each other are fixedly connected to the outer surface of the calibration device (16).
6. A wind turbine blade visual inspection device according to claim 1, characterized in that: Two supporting legs (18) are provided below the carrier plate (17), and the upper surfaces of the two supporting legs (18) are fixedly connected to the bottom surface of the carrier plate (17).