Impeller imbalance monitoring device based on machine vision
By using X-axis and Y-axis adjustment brackets and fixed brackets in the impeller imbalance monitoring device, the problem of limited installation space in the nacelle is solved, enabling multi-directional position adjustment of the camera, adapting to various nacelle types, and improving the accuracy and flexibility of monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2026-04-03
AI Technical Summary
Existing impeller imbalance monitoring devices have limited installation space in the nacelle and a small adjustment range, making them difficult to adapt to different models and accuracy requirements, resulting in inaccurate monitoring.
The camera is installed in the cabin using X-axis adjustment brackets, Y-axis adjustment brackets, and fixed brackets, enabling multi-directional position adjustment, expanding the adjustment range, and adapting to various cabin types.
It enables the camera to be adjusted in multiple directions, increasing the adjustment range, adapting to different cabin types, and improving the accuracy and flexibility of monitoring.
Smart Images
Figure CN224079259U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind turbine monitoring technology, and in particular to a rotor imbalance monitoring device based on machine vision. Background Technology
[0002] The safe and reliable operation of wind turbines is a primary concern for the entire wind power industry. The rotor is a crucial component of a wind turbine, converting the kinetic energy of the air into mechanical energy to drive the generator. With the rapid development of the wind power industry, the rated power of wind turbines and parameters such as blade length, chord length, and weight are increasing, as are the tower heights, rising from the initial 70m to the current 150m. Consequently, the number of wind turbine failures is also increasing. As the power source of the wind turbine, aerodynamic imbalance in the rotor will generate additional loads or load imbalances in the unit, reducing power generation efficiency and the wind turbine's power curve. It will also damage critical components such as the pitch system and drivetrain yaw system. In pursuit of lower power generation costs, wind turbine stability is increasingly sensitive to the precision of blade manufacturing, installation, and control. These factors ultimately manifest as aerodynamic imbalances in the impact on turbine vibration, load, and power generation.
[0003] Rotor imbalance monitoring is particularly important in the current environment. Currently, machine vision can be used to acquire images of the wind turbine tower and blades. Image processing techniques can then be used to monitor blade clearance, thereby detecting and issuing early warnings for rotor imbalance. For example, patent CN219327595U discloses a wind turbine clearance monitoring installation and adjustment device. This device mounts a blade clearance monitor (such as a video or laser device) onto the nacelle structure to monitor blade clearance. Furthermore, the device can adjust the spatial position of the blade clearance monitor, addressing installation differences caused by variations in wind turbine manufacturers, models, and precision, ensuring the accuracy of the blade clearance monitoring. However, due to limited installation space within the nacelle, the adjustment range of this device is small, limiting its applicability to a limited range of nacelles. Summary of the Invention
[0004] This invention provides a machine vision-based impeller imbalance monitoring device. The device uses an X-axis adjustment bracket, a Y-axis adjustment bracket, and a fixed bracket to install a camera within a limited area inside the nacelle. It can also adjust the position of the camera in multiple directions with a large adjustment range, making it adaptable to various nacelle types.
[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0006] An impeller imbalance monitoring device based on machine vision, at least including a camera installed in the nacelle, the lens of the camera facing the tower barrel and the blade, and real-time acquiring video image information of the tower barrel and the blade. The camera is installed in the nacelle through an installation adjustment module, and the installation adjustment module includes:
[0007] An X-direction adjustment bracket, which is integrally connected by a first X-direction adjustment plate, a connecting plate, and a second X-direction adjustment plate in sequence to form a stepped structure, and the first X-direction adjustment plate and the second X-direction adjustment plate are arranged in parallel. Along the X direction on the first X-direction adjustment plate, multiple groups of first mounting holes are distributed. The camera is fixedly connected to any group of first mounting holes on the first X-direction adjustment plate through bolts; on the second X-direction adjustment plate, there is a first fixing hole and multiple first adjustment holes, and the multiple first adjustment holes are evenly distributed on the circumference with the first fixing hole as the center of the circle;
[0008] A Y-direction adjustment bracket, which is integrally in a U-shaped structure, and is integrally connected by a Y-direction fixing plate and two adjustment side plates located on both sides of the Y-direction fixing plate. On the Y-direction fixing plate, there is a second fixing hole and multiple X-direction adjustment arc holes, and the multiple X-direction adjustment arc holes are evenly distributed on the circumference with the second fixing hole as the center of the circle, and the second fixing hole and the multiple X-direction adjustment arc holes respectively correspond to the first fixing hole and the multiple first adjustment holes on the second X-direction adjustment plate and are respectively fixedly connected through bolts, so that the camera is located between the two adjustment side plates; on both of the two adjustment side plates, multiple second adjustment holes are arranged in a matrix distribution;
[0009] A fixing bracket, which includes a fixing frame and two fixing supports installed on the fixing frame. The fixing frame is fixed in the nacelle and is located at the opening at the bottom of the nacelle. The two fixing supports are respectively fixed on the two side surfaces of the fixing frame along the Y direction. On both of the two fixing supports, there are a third fixing hole and Y-direction adjustment arc holes, and the Y-direction adjustment arc holes are distributed along the circumference with the third fixing hole as the center of the circle, and the third fixing hole and the Y-direction adjustment arc holes of the two fixing supports are respectively fixedly connected to any two adjacent second adjustment holes on the two adjustment side plates through bolts, so that the entire Y-direction adjustment bracket is located within the fixing frame, thereby installing the camera in the nacelle and realizing the position adjustment of the camera in multiple directions.
[0010] There are five groups of first mounting holes on the first X-direction adjustment plate, and each group of first mounting holes includes two first mounting holes arranged along the Z direction.
[0011] The position heights of the five groups of first mounting holes in the Z direction are different. When adjusting the installation position of the camera, the position adjustments in the X direction and the Z direction can be carried out simultaneously.
[0012] There are three first adjustment holes, and three X-direction adjustment arc holes are correspondingly arranged.
[0013] Each adjustment side plate has 4×4 second adjustment holes.
[0014] The fixed frame has a rectangular frame structure and includes a support plate, two mounting side plates connected to both sides of the support plate, and a support strip connected between the two mounting side plates. The mounting side plates are fixedly connected to the cabin, thereby fixing the entire fixed frame inside the cabin.
[0015] The two fixed supports on the fixed bracket are fixed to the two mounting side plates.
[0016] The upper part of the fixed bracket is connected to a protective cover, and the camera, X-axis adjustment bracket, and Y-axis adjustment bracket are all located inside the protective cover.
[0017] The camera is equipped with a water tank, which is fixed inside the cabin and connected to the heat dissipation pipes arranged around the camera. The water in the water tank is driven by a circulation pump to circulate through the heat dissipation pipes to dissipate heat from the camera.
[0018] A cable guide plate is connected to the fixed frame of the fixed bracket. The cable guide plate is provided with wire holes that connect the inside and outside of the fixed frame. The power cord of the circulating pump is led out to the outside of the fixed frame through the wire holes to obtain power.
[0019] Compared with the prior art, the beneficial effects of this utility model are: the impeller imbalance monitoring device based on machine vision provided by this utility model can install the camera in a limited area inside the cabin through the X-axis adjustment bracket, Y-axis adjustment bracket and fixed bracket, and at the same time realize the position adjustment of the camera in multiple directions, and the adjustment range is large, which can adapt to various cabin types. Attached Figure Description
[0020] Figure 1 A schematic diagram of the external structure of the machine vision-based impeller imbalance monitoring device provided by this utility model;
[0021] Figure 2 A schematic diagram of the internal structure of the machine vision-based impeller imbalance monitoring device provided by this utility model;
[0022] Figure 3 This is a schematic diagram of the X-axis adjustment bracket in this utility model;
[0023] Figure 4 This is a schematic diagram of the Y-axis adjustment bracket in this utility model;
[0024] Figure 5 This is a schematic diagram showing the connection between the X-axis adjustment bracket and the Y-axis adjustment bracket in this utility model;
[0025] Figure 6 This is a schematic diagram of the structure of the fixed bracket in this utility model;
[0026] Figure 7 This is a schematic diagram showing the connection between the Y-axis adjustment bracket and the fixed bracket in this utility model;
[0027] In the diagram, 1-camera, 2-X-direction adjustment bracket, 21-first X-direction adjustment plate, 22-connecting plate, 23-second X-direction adjustment plate, 24-first mounting hole, 25-first fixing hole, 26-first adjustment hole, 3-Y-direction adjustment bracket, 31-Y-direction fixing plate, 32-adjustment side plate, 33-second fixing hole, 34-X-direction adjustment arc hole, 35-second adjustment hole, 4-fixed bracket, 41-support plate, 42-mounting side plate, 43-support bar, 44-fixed support, 45-third fixing hole, 46-Y-direction adjustment arc hole, 5-protective cover, 6-water tank, 7-wiring plate. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] The overall structure of the machine vision-based impeller imbalance monitoring device provided in this embodiment is as follows: Figure 1 As shown, it includes at least a camera 1 installed in the nacelle. The camera lens is directed towards the tower and blades to acquire video image information of the tower and blades in real time. The acquired image information is used to monitor impeller imbalance. Currently, there are many technologies related to machine vision monitoring of impeller imbalance. The principle of these technologies will not be described in detail in this application. The focus of this utility model is on the improvement of the camera installation.
[0030] In this embodiment, the camera is installed inside the cabin via an adjustment module. Specifically, an opening is made at the bottom of the cabin, and the camera lens faces the opening at the bottom of the cabin. The adjustment module includes an X-axis adjustment bracket 2, a Y-axis adjustment bracket 3, and a fixed bracket 4, as shown below. Figure 1 and Figure 2 As shown.
[0031] The X-axis adjustment bracket consists of a stepped structure formed by the integrally connected first X-axis adjustment plate 21, connecting plate 22, and second X-axis adjustment plate 23. Figure 3As shown, the first X-direction adjustment plate and the second X-direction adjustment plate are arranged in parallel. Multiple groups of first mounting holes 24 are arranged along the X direction on the first X-direction adjustment plate. The camera is fixedly connected to any group of first mounting holes on the first X-direction adjustment plate through bolts. By fixing the camera to different groups of first mounting holes, the mounting position of the camera in the X direction is adjusted. Specifically, five groups of first mounting holes are provided on the first X-direction adjustment plate, and each group of first mounting holes includes two first mounting holes arranged along the Z direction. Further, the positions of the five groups of first mounting holes in the Z direction are different. When adjusting the mounting position of the camera on the first X-direction adjustment plate, the position adjustment in both the X direction and the Z direction can be performed simultaneously. One first fixing hole 25 and multiple first adjustment holes 26 are provided on the second X-direction adjustment plate, and the multiple first adjustment holes are evenly distributed on the circumference with the first fixing hole as the center; specifically, three first adjustment holes are provided. [[ID=I]]
[0032] The Y-direction adjustment bracket is integrally in a U shape, and is integrally connected by a Y-direction fixing plate 31 and two adjustment side plates 32 located on both sides of the Y-direction fixing plate, as Figure 4 shown. One second fixing hole 33 and multiple X-direction adjustment arc holes 34 are provided on the Y-direction fixing plate, and the multiple X-direction adjustment arc holes are evenly distributed on the circumference with the second fixing hole as the center, and the second fixing hole and the multiple X-direction adjustment arc holes respectively correspond to the first fixing hole and the multiple first adjustment holes on the second X-direction adjustment plate and are respectively fixedly connected by bolts, as Figure 5 shown, so that the camera is located between the two adjustment side plates. By adjusting the locking position of the bolts on the X-direction adjustment arc holes, the mounting position of the second X-direction adjustment plate in the X direction is adjusted, thereby performing a secondary adjustment on the X-direction position of the camera and expanding the X-direction position adjustment range of the camera. Specifically, three X-direction adjustment arc holes are correspondingly provided. In this embodiment, multiple second adjustment holes 35 are arranged in a matrix on both of the two adjustment side plates; specifically, 4×4 second adjustment holes are distributed on each adjustment side plate.
[0033] The fixing bracket includes a fixing frame and two fixing supports 44 mounted on the fixing frame, as Figure 6As shown, the fixing frame is fixed inside the nacelle and located at the opening at the bottom of the nacelle. Specifically, the fixing frame has a rectangular frame structure, including a support plate 41, two mounting side plates 42 connected to both sides of the support plate, and a support strip 43 connected between the two mounting side plates. Each mounting side plate is connected to a lug plate, which is fixed to the nacelle via the lug plates and bolts, thus fixing the entire fixing frame inside the nacelle. The opening at the bottom of the nacelle is located through the fixing frame opening. Two fixing supports are respectively fixed to the two sides of the fixing frame along the Y direction. Specifically, the two fixing supports are fixed to the two mounting side plates. Each fixing support is provided with a third fixing hole 45 and a Y-direction adjustment arc hole 46. The Y-direction adjustment arc holes are distributed along a circle centered on the third fixing hole, and the radius distance between the Y-direction adjustment arc hole and the third fixing hole is equal to the distance between two adjacent second adjustment holes on the adjustment side plate. Two adjustment side plates on the Y-direction adjustment bracket are respectively connected to the two fixing supports, so that the entire Y-direction adjustment bracket is located inside the fixing frame, as shown. Figure 7 As shown, specifically, the third fixing holes and Y-axis adjustment arc holes of the two fixed supports are fixedly connected to any two adjacent second adjustment holes on the adjustment side plate by bolts. By fixing the third fixing holes and Y-axis adjustment arc holes to two adjacent second adjustment holes at different positions on the adjustment side plate, the installation position of the entire Y-axis adjustment bracket in the Z-axis can be adjusted. At the same time, by adjusting the locking position of the bolts in the Y-axis adjustment arc holes, the installation position of the entire Y-axis adjustment bracket in the Y-axis can be adjusted, thereby adjusting the Y-axis and Z-axis installation positions of the camera.
[0034] In this embodiment, a protective cover 5 is connected to the upper part of the fixed bracket. The camera, X-axis adjustment bracket and Y-axis adjustment bracket are all located inside the protective cover to protect them and prevent scattered parts in the cabin from affecting or damaging them.
[0035] In this embodiment, the camera is equipped with a water tank 6, which is fixed inside the camera compartment and connected to a heat dissipation pipe (not shown in the figure) arranged around the camera. A circulation pump inside the water tank drives the water to circulate through the heat dissipation pipe, thus cooling the camera. Specifically, the water tank is mounted and fixed on a protective cover. A cable guide plate 7 is connected to the fixing frame of the mounting bracket. The cable guide plate has wire holes connecting the inside and outside of the fixing frame, through which the power cable of the circulation pump is led out to the outside of the fixing frame for power. Specifically, a through hole is provided on the support plate of the fixing frame, and the cable guide plate is fixed to the fixing frame and located on the through hole.
[0036] In this invention, the camera is installed within a limited area inside the cabin by means of an X-axis adjustment bracket, a Y-axis adjustment bracket, and a fixed bracket. At the same time, the position of the camera can be adjusted in multiple directions, including the X, Y, and Z axes, and the adjustment range is large, which can adapt to various cabin types.
Claims
1. A machine vision-based impeller imbalance monitoring device, comprising at least a camera (1) installed in the nacelle, the lens of the camera (1) facing the tower and blades, for real-time acquisition of video image information of the tower and blades, characterized in that: The camera (1) is installed in the engine room through an installation and adjustment module, and the installation and adjustment module includes: An X-direction adjustment bracket (2), which is formed by sequentially connecting a first X-direction adjustment plate (21), a connecting plate (22), and a second X-direction adjustment plate (23) in an integrated manner into a stepped structure, and the first X-direction adjustment plate (21) and the second X-direction adjustment plate (23) are arranged in parallel. Multiple groups of first mounting holes (24) are distributed along the X direction on the first X-direction adjustment plate (21), and the camera (1) is fixedly connected to any one group of first mounting holes (24) on the first X-direction adjustment plate (21) by bolts; a first fixing hole (25) and multiple first adjustment holes (26) are provided on the second X-direction adjustment plate (23), and the multiple first adjustment holes (26) are evenly distributed on the circumference with the first fixing hole (25) as the center; A Y-direction adjustment bracket (3), which is integrally in a U-shaped structure and is formed by integrally connecting a Y-direction fixing plate (31) and two adjustment side plates (32) located on both sides of the Y-direction fixing plate (31). A second fixing hole (33) and multiple X-direction adjustment arc holes (34) are provided on the Y-direction fixing plate (31), and the multiple X-direction adjustment arc holes (34) are evenly distributed on the circumference with the second fixing hole (33) as the center, and the second fixing hole (33) and the multiple X-direction adjustment arc holes (34) respectively correspond to the first fixing hole (25) and the multiple first adjustment holes (26) on the second X-direction adjustment plate (23) and are respectively fixedly connected by bolts, so that the camera (1) is located between the two adjustment side plates (32); multiple second adjustment holes (35) are arranged in a matrix on both of the two adjustment side plates (32); A fixing bracket (4), which includes a fixing frame and two fixing supports (44) installed on the fixing frame. The fixing frame is fixed in the engine room and is located at the opening at the bottom of the engine room. The two fixing supports (44) are respectively fixed on the two side surfaces of the fixing frame along the Y direction. A third fixing hole (45) and a Y-direction adjustment arc hole (46) are provided on each of the two fixing supports (44), and the Y-direction adjustment arc hole (46) is distributed along the circumference with the third fixing hole (45) as the center. The third fixing holes (45) and the Y-direction adjustment arc holes (46) of the two fixing supports (44) are respectively fixedly connected to any two adjacent second adjustment holes (35) on the two adjustment side plates (32) by bolts, so that the entire Y-direction adjustment bracket (3) is located within the fixing frame, thereby installing the camera (1) in the engine room and realizing the position adjustment of the camera (1) in multiple directions.
2. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: Five groups of first mounting holes (24) are provided on the first X-direction adjustment plate (21), and each group of first mounting holes (24) includes two first mounting holes (24) arranged along the Z direction.
3. The impeller imbalance monitoring device based on machine vision according to claim 2, characterized in that: The five groups of first mounting holes (24) have different position heights in the Z direction. When adjusting the installation position of the camera (1), the position adjustments in the X direction and the Z direction can be carried out simultaneously.
4. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: Three first adjustment holes (26) are provided, and three X-direction adjustment arc holes (34) are correspondingly provided.
5. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: 4×4 second adjustment holes (35) are distributed on each adjustment side plate (32).
6. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: The fixed frame is a rectangular frame structure, including a support plate (41), two mounting side plates (42) connected to both sides of the support plate (41), and a support strip (43) connected between the two mounting side plates (42). The mounting side plates (42) are fixedly connected to the cabin, thereby fixing the entire fixed frame inside the cabin.
7. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: The two fixed supports (44) on the fixed bracket (4) are fixed to the two mounting side plates (42).
8. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: The upper part of the fixed bracket (4) is connected to a protective cover (5), and the camera (1), the X-axis adjustment bracket (2), and the Y-axis adjustment bracket (3) are all located inside the protective cover (5).
9. The impeller imbalance monitoring device based on machine vision according to claim 1, characterized in that: The camera (1) is equipped with a water tank (6), which is fixed inside the cabin and connected to the heat dissipation pipes arranged around the camera (1). The water in the water tank (6) is driven by a circulation pump in the water tank (6) to circulate in the heat dissipation pipes to dissipate heat for the camera (1).
10. The impeller imbalance monitoring device based on machine vision according to claim 9, characterized in that: The fixed frame of the fixed bracket (4) is connected to a wire guide plate (7). The wire guide plate (7) is provided with wire holes that connect the inside and outside of the fixed frame. The power cord of the circulating pump is led out through the wire holes to the outside of the fixed frame for power supply.