Wind turbine generator blade detection device and detection method

Abstract

The invention provides a wind turbine generator blade detection device and detection method, and belongs to the technical field of blade detection equipment. The device comprises a support; the take-up and pay-off mechanism is rotationally arranged on the support and used for taking up and paying off a cable, and the fixed end of the cable is fixed to the take-up and pay-off mechanism; the distance detection mechanism is arranged on the take-up and pay-off mechanism and used for detecting the pay-off length of the cable; the shooting mechanism is connected with the take-up and pay-off end of the cable and used for shooting an image in the leaf; and the controller is in communication connection with the fixed end of the cable and is used for adjusting the rotation angle of the shooting mechanism based on the received angle control instruction and receiving an image shot by the shooting mechanism. The device is simple in structure and convenient to use, can shoot an image of a small space in the blade, achieves the monitoring of the blade, and improves the operation safety of a wind turbine generator.

Description

Technical Field

[0001] The present invention relates to the technical field of blade detection equipment, and in particular to a wind turbine blade detection device and a wind turbine blade detection method. Background Art

[0002] With the continuous expansion of the capacity of wind turbines, blades, as one of the core components of wind turbines, account for 20% of the cost of the entire machine. Once an accident occurs, the loss will be heavy. In the production process, due to the deformation of tooling and molds, component deformation, manufacturing process and human factors, the blades will inevitably have defects such as pores, cracks, delamination, and lack of glue. During transportation, hoisting and operation, the blade structure will also be damaged due to accidental impacts, shedding of protective layers, etc. However, due to the lack of effective methods and means for detecting small spaces in blades, the inner cavity of the blade that cannot be entered by personnel cannot be detected, resulting in blindness and lag in the small spaces of the blades.

[0003] At present, the conventional inspection devices in the wind turbine blade industry are: manual inspection or endoscope robot inspection. Among them, the manual inspection method is: the maintenance personnel use a flashlight to enter the inner cavity to take pictures and inspect, which is inconvenient to operate and has a high safety risk; the wind turbine blade internal inspection robot method is: the internal inspection robot enters the blade to inspect, and performs endoscope inspection on defects such as bulges, wrinkles, degumming, cracks, etc. inside the blade, obtains detailed images and data inside the blade, and helps inspectors accurately identify and evaluate potential defects and damages. However, due to the large size of the existing blade internal inspection robot, it is impossible to enter a small space for inspection, and the inspection is not comprehensive. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a wind turbine blade detection device and detection method to solve the above-mentioned manual detection method, which is inconvenient to operate and has a high safety risk, and the method of using a wind turbine blade internal inspection robot for detection, because the robot itself is large in size, it cannot enter a small space for detection, and the detection is not comprehensive.

[0005] In order to achieve the above object, an embodiment of the present invention provides a wind turbine blade detection device, the device comprising: Bracket; A wire-retracting and -releasing mechanism is rotatably arranged on the bracket and is used for retracting and -releasing the cable, and a fixed end of the cable is fixed on the wire-retracting and -releasing mechanism; A distance detection mechanism, arranged on the cable retracting and releasing mechanism, for detecting the cable pay-off length; A shooting mechanism, connected to the retractable end of the cable, for shooting images of the interior of the blade; The controller is communicatively connected to the fixed end of the cable, and is used to adjust the rotation angle of the shooting mechanism based on the received angle control instruction, and receive the image shot by the shooting mechanism.

[0006] Optionally, the device further comprises: The display terminal is connected to the controller for displaying the received image.

[0007] Optionally, the device further comprises: The remote controller is connected to the controller for generating the angle control instruction according to an external input signal and sending the instruction to the controller.

[0008] Optionally, the bracket includes: Frame type support frame; A U-shaped handle, arranged at the top of the frame-type support frame; Two support rods are arranged opposite to each other at the bottom ends of the frame-type support frame and are used to keep the frame-type support frame stable during the detection process.

[0009] Optionally, a roller is arranged opposite to the bottom end of the bracket.

[0010] Optionally, the distance detection mechanism is an encoder.

[0011] Optionally, the device further comprises: A hollow wire management cylinder is arranged on the bracket and located above the wire retracting and releasing mechanism, and the retracting and releasing end of the cable passes through the wire management cylinder.

[0012] Optionally, the wire retracting and releasing mechanism includes: A winding drum is rotatably arranged on the bracket via a rotating shaft; A handle is arranged on the winding drum.

[0013] Optionally, the shooting mechanism includes: A base, wherein a driving mechanism is disposed in the base; A rotating block is rotatably disposed on the base, connected to the power output end of the driving mechanism, and is used to generate rotation under the action of the driving force; A camera, arranged on the rotating block, for taking images; The light source is arranged on the rotating block and is used for supplementary lighting during the shooting process of the camera.

[0014] On the other hand, an embodiment of the present invention further provides a wind turbine blade detection method, which is used to perform internal detection of wind turbine blades using the above-mentioned wind turbine blade detection device, and the method includes: Remove the cover plate on the wheel hub; Adjust the blade posture so that the blade to be tested is in a vertical downward state and locked; The shooting mechanism is placed into the blade through the space of the hub to shoot the blade pattern, and at the same time the wire-reeling mechanism is controlled to start wire-reeling, so that the shooting mechanism moves downward along the blade under the action of gravity, and the wire-reeling length is detected by the distance detection mechanism until the blade detection is completed.

[0015] This technical solution uses a cable retracting and releasing mechanism to retract and release the cable and adjust the shooting angle of the shooting mechanism to obtain images of different positions and different areas inside the blade. The overall structure is simple and easy to use. It can be applied to small internal space areas to achieve comprehensive shooting of the internal image of the blade, realize comprehensive monitoring of the blade, and improve the operating safety of the wind turbine set.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 is a front view of the wind turbine blade detection device provided by the present invention; Figure 2 This is a measurement diagram of the wind turbine blade detection device provided by the present invention; Figure 3 It is a structural schematic diagram of the shooting mechanism provided by the present invention; Figure 4 The present invention is a flow chart of a method for detecting blades of a wind turbine generator set.

[0018] Description of Reference Numerals 1- bracket; 2- wire retracting and releasing mechanism; 3- cable; 4- distance detection mechanism; 5- shooting mechanism; 6-controller; 7-display terminal; 8-remote controller; 9-cable management drum; 11-frame support frame; 12-U-shaped handle; 13-support rod; 14-roller; 21-reel; 22-handle; 51-base; 52-driving mechanism; 53-rotating block; 54-camera; 55-light source. DETAILED DESCRIPTION

[0019] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0020] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0021] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0022] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0023] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Figure 1 is a front view of the wind turbine blade detection device provided by the present invention; Figure 2 This is a measurement diagram of the wind turbine blade detection device provided by the present invention; Figure 3 It is a structural schematic diagram of the shooting mechanism provided by the present invention; Figure 4 The present invention is a flow chart of a method for detecting blades of a wind turbine generator set.

[0027] like Figure 1-2As shown, this embodiment provides a wind turbine blade detection device, the device comprising: Bracket 1; A wire-retracting and -releasing mechanism 2 is rotatably arranged on the bracket 1 and is used for retracting and -releasing a cable 3, and a fixed end of the cable 3 is fixed on the wire-retracting and -releasing mechanism 2; A distance detection mechanism 4 is provided on the wire-reeling mechanism 2 and is used to detect the wire-reeling length of the cable 3; A shooting mechanism 5, connected to the retractable end of the cable 3, for shooting an image of the interior of the blade; The controller 6 is communicatively connected to the fixed end of the cable 3 , and is used to adjust the rotation angle of the photographing mechanism 5 based on the received angle control instruction, and receive the image photographed by the photographing mechanism 5 .

[0028] Specifically, in this embodiment, in order to ensure the ease of use of the device, a bracket 1 is first provided to carry the other components; and a retractable wire mechanism 2 is provided on the bracket. The retractable wire mechanism 2 can rotate itself under the action of an external force to achieve the retraction and release of the cable 3, thereby driving the shooting mechanism 5 provided at the retractable end of the cable 3 to move, so as to achieve the shooting of images of blades at different lengths; at the same time, a distance detection mechanism 4 is provided on the retractable wire mechanism 2, which is used to detect the pay-off length of the cable 3 and accurately determine the position of the corresponding blade when an abnormal image exists; in addition, the shooting mechanism 5 is provided as an angle-adjustable camera, and the rotation angle of the shooting mechanism 5 is adjusted to ensure that the blades can be fully detected.

[0029] More specifically, the cable 3 uses a 90 steel cable, which not only transmits signals but also has a certain structural strength. It serves as a fixed cable to carry the shooting mechanism 5. In order to facilitate wiring installation, power supply and signal transmission, the controller 6 is arranged on the retractable mechanism 2 so that the controller 6 rotates with the retractable mechanism 2. More specifically, a power supply is arranged on the retractable mechanism 2 to supply power to the shooting mechanism 5 to meet long-term shooting requirements.

[0030] Furthermore, the device also includes: The display terminal 7 is connected to the controller 6 for displaying the received image.

[0031] Specifically, the display terminal 7 is provided with a display screen for displaying images, and can be a mobile terminal such as a mobile phone, or a tablet, a computer, or other device for displaying images.

[0032] Furthermore, the device also includes: The remote controller 8 is connected to the controller 6 for generating the angle control instruction according to an external input signal and sending the instruction to the controller 6 .

[0033] Specifically, in this embodiment, buttons and handles are provided on the remote control 8. The operator inputs external input signals by pressing the buttons and handles. The remote control 8 generates an angle control instruction for controlling the rotation angle of the shooting mechanism 5 according to the input model, and sends the instruction to the controller 6 to realize the control of the shooting mechanism 5.

[0034] In another embodiment, the remote controller 8 can be replaced by a touch screen or the like.

[0035] More specifically, the display terminal 7 and the remote controller 8 and the controller 6 are connected to each other through a wireless communication module.

[0036] Furthermore, the support 1 comprises: Frame type support frame 11; A U-shaped handle 12, arranged at the top of the frame-type support frame 11; Two support rods 13 are arranged opposite to each other at the bottom ends of the frame-type support frame 11 to keep the frame-type support frame 11 stable during the detection process.

[0037] Specifically, in this embodiment, the bracket 1 is made of aluminum alloy, which can not only reduce its own weight but also ensure sufficient structural strength; the bracket 1 is configured to include a frame-type support frame 11, which can ensure the overall structural strength; at the same time, a U-shaped handle 12 is provided at the top of the frame-type support frame 11, and the U-shaped handle 12 is used to realize the movement of the entire device; secondly, two support rods 13 are relatively arranged at the bottom end of the frame-type support frame 11 to ensure that during use, the bracket 1 is in a vertical and stable state, not easy to tip over, and convenient for the retraction and release of the cable 3.

[0038] Furthermore, a roller 14 is disposed opposite to the bottom end of the bracket 1 .

[0039] Specifically, in this embodiment, when the device is moved over a long distance, since the device itself has a certain weight, two rollers 14 are provided at the bottom end of the bracket 1 to achieve movement by dragging, thereby saving manpower.

[0040] Furthermore, the distance detection mechanism 4 is an encoder.

[0041] Specifically, in this embodiment, in order to accurately monitor the position of the shooting mechanism 5 when shooting an image, an encoder is set on the reeling mechanism 2. When the reeling mechanism 2 rotates, the encoder can obtain the corresponding angle signal, and because the reeling mechanism 2 is fixed, the length of the reeling under the corresponding angle is obtained. In addition, in order to ensure the accuracy of the collected length data, the length can be corrected according to the number of turns of the reeling mechanism 2 (for example: since the diameter of the reeling will increase after the cable is wound, when the cable is just being reeled in, the length of the cable released by the reeling mechanism 2 rotating one circle is greater than the length of the cable after the reeling mechanism 2 rotates multiple times).

[0042] Furthermore, the device also includes: A wire management barrel 9 with a hollow interior is disposed on the bracket 1 and is located above the wire retracting and releasing mechanism 2 . The retracting and releasing ends of the cables 3 pass through the wire management barrel 9 .

[0043] In this embodiment, a wire management barrel 9 with a hollow interior is provided, and the cable passes through the wire management barrel 9, so that the cable 3 is limited in position during the wire laying process.

[0044] Furthermore, the wire-retracting and -releasing mechanism 2 comprises: The winding drum 21 is rotatably arranged on the bracket 1 via a rotating shaft; The handle 22 is disposed on the winding drum 21 .

[0045] Specifically, in this embodiment, the winding drum 21 is rotatably arranged on the bracket 1 via a rotating shaft (bearing), and the cable is wound and released by the rotation of the winding drum 21. At the same time, in order to facilitate the rotation of the winding drum 21, a handle 22 is provided on the winding drum 21, and an external force is applied to the handle 22 to promote the rotation of the winding drum 21.

[0046] Furthermore, if Figure 3 As shown, the shooting mechanism 5 includes: A base 51, wherein a driving mechanism 52 is disposed in the base 51; The rotating block 53 is rotatably disposed on the base 51 and connected to the power output end of the driving mechanism 52, and is used to generate rotation under the action of the driving force; A camera 54, disposed on the rotating block 53, for capturing images; The light source 55 is disposed on the rotating block 53 and is used for supplementary lighting during the shooting process of the camera 54 .

[0047] Specifically, in this embodiment, first, a base 51 is set, and a limit ring is set on the base 51 to fix the base 51 with the winding end of the cable 3, so that the base 51 can be dragged by the cable, and then the inside of the base 51 is set as a hollow structure, and a driving mechanism 52 is set in the hollow inside, and the driving mechanism 52 is connected to the cable 3, and can generate drive through the electric energy transmitted by the cable 3; and a rotating block 53 is rotatably set on the base 51, and a camera 54 is set on the rotating block 53, and the rotating block 53 is connected to the power output end of the driving mechanism 52, which is used to rotate under the action of the driving force, so as to adjust the shooting angle of the camera 54; in addition, since the inside of the blade is in a dark environment, in order to ensure the quality of the captured image. A light source 55 is set on the rotating block 53, and moves synchronously with the camera 54 during the shooting process of the camera 54 to provide fill light.

[0048] More specifically, the driving mechanism 52 can be configured as a driving motor, and the driving rod of the driving motor is matched with the gears provided on the rotating block 53 through gears to achieve drive transmission.

[0049] The camera 54 may have 5 million pixels, a focal length of 3.6 mm, a diameter of 40 mm, and a length of 75 mm. The waterproof grade is IP68, and the light source 55 may have 6 3W LED lights to form a matrix array.

[0050] This embodiment also provides a wind turbine blade detection method, which is used to use the above-mentioned wind turbine blade detection device to perform internal detection of wind turbine blades, such as Figure 4 As shown, the method includes: Remove the cover plate on the wheel hub; Adjust the blade posture so that the blade to be tested is in a vertical downward state and locked; The shooting mechanism is placed into the blade through the space of the hub to shoot the blade pattern. At the same time, the retractable wire mechanism is controlled to start paying out the wire, so that the shooting mechanism moves downward along the blade under the action of gravity, and the distance detection mechanism detects the pay-out length until the blade inspection is completed. The remaining blades are inspected in the same way. After completing the inspection of the three blades of the unit, the manhole cover and the metal baffle in the hub are installed in turn, and the bolts are tightened to complete the operation process.

[0051] Specifically, in this embodiment, the blade may be locked by a manual or hydraulic mechanical lock, so that the blade will not rotate during the detection process.

[0052] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0053] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0054] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner when there is no contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations. In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A wind turbine blade detection device, characterized in that: The device comprises: Bracket (1); A wire-retracting and -releasing mechanism (2) is rotatably arranged on the support (1) and is used for retracting and -releasing a cable (3); a fixed end of the cable (3) is fixed on the wire-retracting and -releasing mechanism (2); A distance detection mechanism (4) is arranged on the wire-reeling mechanism (2) and is used to detect the wire-reeling length of the cable (3); A photographing mechanism (5) connected to the retractable end of the cable (3) and used to photograph an image of the interior of the blade; A controller (6) is communicatively connected to the fixed end of the cable (3) and is used to adjust the rotation angle of the photographing mechanism (5) based on the received angle control instruction, and to receive the image photographed by the photographing mechanism (5).

2. The wind turbine blade detection device according to claim 1, characterized in that: The device also includes: The display terminal (7) is connected to the controller (6) for displaying the received image.

3. The wind turbine blade detection device according to claim 1, characterized in that: The device also includes: A remote controller (8) is connected to the controller (6) for generating the angle control instruction according to an external input signal and sending the instruction to the controller (6).

4. The wind turbine blade detection device according to claim 1, characterized in that: The support (1) comprises: A frame type support frame (11); A U-shaped handle (12) disposed on the top of the frame-type support frame (11); Two support rods (13) are arranged opposite to each other at the bottom ends of the frame-type support frame (11) and are used to keep the frame-type support frame (11) stable during the detection process.

5. The wind turbine blade detection device according to claim 1, characterized in that: A roller (14) is arranged opposite to the bottom end of the bracket (1).

6. The wind turbine blade detection device according to claim 1, characterized in that: The distance detection mechanism (4) is an encoder.

7. The wind turbine blade detection device according to claim 1, characterized in that: The device also includes: A hollow wire management barrel (9) is arranged on the bracket (1) and is located above the wire retracting and releasing mechanism (2); the retracting and releasing ends of the cables (3) pass through the wire management barrel (9).

8. The wind turbine blade detection device according to claim 1, characterized in that: The wire-retracting and -releasing mechanism (2) comprises: A winding drum (21) rotatably arranged on the bracket (1) via a rotating shaft; A handle (22) is arranged on the winding drum (21).

9. The wind turbine blade detection device according to claim 1, characterized in that: The photographing mechanism (5) comprises: A base (51), wherein a driving mechanism (52) is disposed in the base (51); A rotating block (53) is rotatably disposed on the base (51), connected to a power output end of the driving mechanism (52), and is used to generate rotation under the action of a driving force; A camera (54), arranged on the rotating block (53) and used for capturing images; The light source (55) is arranged on the rotating block (53) and is used to provide fill light during the shooting process of the camera (54).

10. A wind turbine blade detection method, for performing internal detection of a wind turbine blade using the wind turbine blade detection device according to any one of claims 1 to 9, characterized in that: The method comprises: Remove the cover plate on the wheel hub; Adjust the blade posture so that the blade to be tested is in a vertical downward state and locked; The shooting mechanism is placed into the blade through the space of the hub to shoot the blade pattern, and at the same time the wire-reeling mechanism is controlled to start wire-reeling, so that the shooting mechanism moves downward along the blade under the action of gravity, and the wire-reeling length is detected by the distance detection mechanism until the blade detection is completed.

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