CN214621657U - Non-contact dynamic measurement system for offshore wind turbine vibration and erosion test - Google Patents
Non-contact dynamic measurement system for offshore wind turbine vibration and erosion test Download PDFInfo
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- CN214621657U CN214621657U CN202120434200.3U CN202120434200U CN214621657U CN 214621657 U CN214621657 U CN 214621657U CN 202120434200 U CN202120434200 U CN 202120434200U CN 214621657 U CN214621657 U CN 214621657U
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Abstract
The utility model provides a non-contact developments system of measurationing for offshore wind turbine vibration and scouring test has realized all kinds of medium motion accurate measurements under the effect of complicated ocean load. The non-contact dynamic measurement system is supplemented with light through a high-power non-stroboscopic light source so as to ensure the shooting effect of the high-speed camera. And respectively marking the fan structure, the seawater and the soil around the pile by adopting a fixed target point, a high-brightness suspension ball and mixed colored sand. The non-contact dynamic measurement system takes pictures by adopting a high-speed camera, monitors the motion characteristics of all marked objects in the field of view of the camera, and finally obtains the vibration characteristics of a fan structure, the hydrodynamic characteristics of waves and tides, the dynamic characteristics of scouring and suspension migration of soil around a pile and the like by adopting an image analysis technology.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering, especially, relate to a non-contact developments system of measurationing for offshore wind turbine vibration and scouring test.
Background
Vibration monitoring and pile circumference hydrodynamic scouring research of offshore wind turbines under test conditions are very important. However, the current monitoring means mostly adopt contact acceleration and displacement sensors, the sensors are equivalent to the additional mass of the fan structure, the transmission cable can obstruct the free vibration of the fan, and the measurement result is not in accordance with the reality.
In addition, the hydrodynamic environment is complex, waves and tides are unstable turbulence and turbulent flow, the flow velocity is variable, and the test measurement is difficult. The scouring condition of the soil around the pile under the complex hydrodynamic force environment can only be measured after the test is finished, and the dynamic measurement of the process is difficult.
Therefore, it is desirable to provide a non-contact dynamic measurement system for offshore wind turbine vibration and erosion test.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a non-contact developments system of measurationing that is used for offshore wind turbine vibration and scouring test to the not enough of existence among the prior art.
To this end, the above object of the present invention is achieved by the following technical solutions:
a non-contact dynamic measurement system for offshore wind turbine vibration and erosion tests is characterized in that: the non-contact dynamic measurement system for the offshore wind turbine vibration and scouring test comprises a marine environment load simulation system, an illumination system, a high-speed photogrammetry system and a motion marking system;
the marine environment load simulation system comprises a marine environment model groove, water enters and exits from the marine environment model groove, a wave generator, a submersible pump, seawater and a stratum are arranged in the marine environment model groove, the foundation of the marine fan is inserted into the stratum, and the marine environment model groove is made of transparent glass;
the lighting system is used for providing light intensity in the test process;
the motion marking system is a marking object which is respectively arranged in an offshore wind turbine foundation, seawater and a stratum where the wind turbine foundation is located;
the high speed photogrammetry system is used for monitoring the motion characteristics of the marked objects of all the motion marking systems in the field of view of the high speed photogrammetry system.
When adopting above-mentioned technical scheme, the utility model discloses can also adopt or make up and adopt following technical scheme:
as the utility model discloses a preferred technical scheme: and a wave dissipation plate is also arranged in the marine environment model groove and used for eliminating the reflection of waves generated by the wave maker.
As the utility model discloses a preferred technical scheme: the wave making machine comprises a wave making machine connecting arm and a wave making plate, wherein one end of the wave making machine connecting arm is connected to the wave making plate, and the other end of the wave making machine connecting arm is connected with the motor.
As the utility model discloses a preferred technical scheme: the foundation of the offshore wind turbine is a single pile or a pile group.
As the utility model discloses a preferred technical scheme: the marine environment model groove is internally provided with a water inlet tank and a water outlet tank, the water inlet tank and the water outlet tank can be interchanged with each other, and the water level in the water outlet tank is slightly higher than the water level in the water inlet tank during water flow circulation.
As the utility model discloses a preferred technical scheme: the marine environment load simulation system further comprises an electromagnetic wind load simulation device, and the electromagnetic wind load simulation device is matched with magnets arranged in the fan cabin to drive the fan blades.
As the utility model discloses a preferred technical scheme: the lighting system is a high-power stroboflash-free light source.
As the utility model discloses a preferred technical scheme: the motion marking system comprises a fixed marking target point, a high-brightness suspension ball and mixed color sand, wherein the fixed marking target point is fixed to an offshore wind turbine foundation, the high-brightness suspension ball is suspended in seawater, and the mixed color sand is arranged in a stratum where the wind turbine foundation is located.
As the utility model discloses a preferred technical scheme: the high speed photogrammetry system comprises a high speed camera for taking pictures within its field of view and a host for controlling the high speed camera.
The utility model provides a non-contact developments system of measurationing for offshore wind turbine vibration and scouring test has realized all kinds of medium motion accurate measurements under the effect of complicated ocean load. The non-contact dynamic measurement system is supplemented with light through a high-power non-stroboscopic light source so as to ensure the shooting effect of the high-speed camera. And respectively marking the fan structure, the seawater and the soil around the pile by adopting a fixed target point, a high-brightness suspension ball and mixed colored sand. The non-contact dynamic measurement system takes pictures by adopting a high-speed camera, monitors the motion characteristics of all marked objects in the field of view of the camera, and finally obtains the vibration characteristics of a fan structure, the hydrodynamic characteristics of waves and tides, the dynamic characteristics of scouring and suspension migration of soil around a pile and the like by adopting an image analysis technology.
Drawings
FIG. 1 is a schematic view of an overall marine environmental load application and non-contact dynamic measurement system;
FIG. 2 is a top view of a marine environmental load application and non-contact dynamic measurement system;
FIG. 3 is a schematic diagram of structural load simulation and structural vibration marking of a fan;
FIG. 4 is a schematic view of water flow and soil movement marks around the pile;
reference numbers in the figures: 1-marine environment model groove, 2-water inlet tank, 3-wave dissipation plate, 4-wave making machine, 5-transparent glass, 6-simulated seawater and stratum, 7-fan blade, 8-fan cabin, 9-fan tower, 10-fan transition section, 11-fan foundation, 12-electromagnetic wind load simulation device, 13-submersible pump; 14-water outlet tank, 15-high power non-stroboscopic light source; 16-is a wave generator connecting arm, 17-is a wave generating plate, 18-is a fan base plane position, 19-is a high-speed camera, and 20-is a control host; 21-strong magnet, 22-fixed marked target spot, 23-highlight suspension ball and 24-mixed color sand.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an overall schematic diagram of a marine environment load application and non-contact dynamic measurement system, a water inlet tank 2 and a water outlet tank 14 are respectively arranged at two ends of a marine environment model groove 1, the water inlet tank and the water outlet tank are determined according to the tidal current direction, and the water level of the water outlet tank is slightly higher than that of the water inlet tank during water flow circulation. The wave eliminating plate 3 is arranged in the marine environment model groove 1 to eliminate the reflection of waves generated by the wave making machine 4. The front side surface of the marine environment model groove 1 is made of transparent glass 5, so that the conditions of simulating a fan structure and simulating seawater and a stratum 6 can be well observed. The offshore wind turbine comprises a wind turbine blade 7, a wind turbine cabin 8, a wind turbine tower 9, a wind turbine transition section 10 and a wind turbine foundation 11. Wind load is applied through an electromagnetic wind load simulation device 12, and tide simulation pushes water flow to circulate through a submersible pump 13. The whole testing device supplements light intensity through the high-power stroboflash-free light source 15, and the image post-processing analysis effect is guaranteed.
Fig. 2 is a top view of the marine environment load application and non-contact dynamic measurement system, in which the wave generator 4 drives the wave generator connecting arm 16 to move up and down through the servo motor, and waves are generated through the wave generating plate 17 with a certain included angle with the horizontal plane. The wind turbine foundation plane location 18 may be selected from a single pile or a pile group based on the actual wind turbine foundation. The number of the submersible pumps 13 is selected according to the calculated tidal current flow speed and flow. The high-power non-stroboscopic light source 15 determines the position according to the reflection law of light, so that light spots are prevented from being formed in the visual field of the high-speed camera 19, and the high-speed camera 19 is controlled through the host 20, wherein the control comprises frame rate setting, visual field size setting and the like.
Fig. 3 is a schematic diagram of structural load simulation and structural vibration marking of the wind turbine, and a powerful magnet 21 is placed inside a wind turbine cabin 8 to act with an electromagnetic wind load simulation device 12. The vibration of the fan structure is obtained by capturing the spatial position of the stationary marker target 22.
Fig. 4 is a schematic diagram of water flow and pile periphery soil motion marking, a fixed marking target point 22 is used for marking a fan structure, a highlight suspension ball 23 is used for marking tidal current motion, and mixed color sand 24 is used for marking the pile periphery scoured soil. The high-brightness suspension ball 23 has the same density as water, and the size of the high-brightness suspension ball is smaller than the aperture of the wave dissipation plate 3, so that the high-brightness suspension ball can circulate along with water flow.
The specific test process of the non-contact dynamic measurement system for the vibration and scouring test of the offshore wind turbine is as follows:
1) designing a model groove according to actual sea conditions, then placing a seabed stratum, seawater and an offshore wind turbine into the model groove, wherein the wind turbine model is required to accord with the bending rigidity equivalence principle, and then placing the wind turbine model in the middle of the model groove in a pressing-in or driving-in mode.
2) The wave generator, the electromagnetic wind load simulation device and the submersible pump are arranged at corresponding positions, each load application system is started to debug, and simulated wind, wave, tidal current strength and other test control indexes are obtained through conversion according to similar relations such as hydrodynamics, aerodynamics and the like during debugging.
3) And respectively marking the fan structure, water and the soil body around the pile by using a fixed target point, a high-brightness suspension ball and mixed color sand, and adjusting the size of a marker and the color difference contrast before marking.
4) A high-power lighting system is measured and placed in the model groove, a non-stroboscopic light source is selected for testing, the uniformity and stability of light intensity are guaranteed, a high-speed camera needs to be turned on, and no reflection bright spots in a measuring visual field are guaranteed.
5) And starting the high-speed camera and the control host, and adjusting the measurement visual field to completely cover the fan structure, the offshore stratum and the marine stratum in the model groove.
6) Starting a photogrammetry program of the control host, observing the vibration and scouring characteristics of the offshore wind turbine under the working condition of the load application system, ensuring that the high-speed camera body cannot be touched in the observation process, not allowing large environmental noise around the model groove, and changing the frequency and amplitude of load application in the observation process.
7) The continuity of data storage is ensured in the test process, the shot pictures are exported in time after one working condition is finished, and images under different working conditions are stored in different folders.
8) Starting image analysis software, tracking vibration or motion conditions of the mark points to obtain physical quantities such as speed and acceleration, and mainly focusing on the natural vibration frequency and damping characteristics based on the vibration acceleration for the fan structure; for tidal action of seawater, tidal flow velocity is mainly concerned; for the scouring of the soil around the pile, the suspension and migration mechanisms of the soil around the pile at corresponding flow rates are mainly concerned.
The above-mentioned embodiments are only for explaining the preferred embodiments of the present invention, and not for limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made by the present invention fall within the protection scope of the present invention within the spirit and the protection scope of the claims.
Claims (9)
1. A non-contact dynamic measurement system for offshore wind turbine vibration and erosion tests is characterized in that: the non-contact dynamic measurement system for the offshore wind turbine vibration and scouring test comprises a marine environment load simulation system, an illumination system, a high-speed photogrammetry system and a motion marking system;
the marine environment load simulation system comprises a marine environment model groove, water enters and exits from the marine environment model groove, a wave generator, a submersible pump, seawater and a stratum are arranged in the marine environment model groove, the foundation of the marine fan is inserted into the stratum, and the marine environment model groove is made of transparent glass;
the lighting system is used for providing light intensity in the test process;
the motion marking system is a marking object which is respectively arranged in an offshore wind turbine foundation, seawater and a stratum where the wind turbine foundation is located;
the high speed photogrammetry system is used for monitoring the motion characteristics of the marked objects of all the motion marking systems in the field of view of the high speed photogrammetry system.
2. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: and a wave dissipation plate is also arranged in the marine environment model groove and used for eliminating the reflection of waves generated by the wave maker.
3. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the wave making machine comprises a wave making machine connecting arm and a wave making plate, wherein one end of the wave making machine connecting arm is connected to the wave making plate, and the other end of the wave making machine connecting arm is connected with the motor.
4. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the foundation of the offshore wind turbine is a single pile or a pile group.
5. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the marine environment model groove is internally provided with a water inlet tank and a water outlet tank, the water inlet tank and the water outlet tank can be interchanged with each other, and the water level in the water outlet tank is slightly higher than the water level in the water inlet tank during water flow circulation.
6. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the marine environment load simulation system further comprises an electromagnetic wind load simulation device, and the electromagnetic wind load simulation device is matched with magnets arranged in the fan cabin to drive the fan blades.
7. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the lighting system is a high-power stroboflash-free light source.
8. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the motion marking system comprises a fixed marking target point, a high-brightness suspension ball and mixed color sand, wherein the fixed marking target point is fixed to an offshore wind turbine foundation, the high-brightness suspension ball is suspended in seawater, and the mixed color sand is arranged in a stratum where the wind turbine foundation is located.
9. The non-contact dynamic measurement system for offshore wind turbine vibration and erosion testing according to claim 1, wherein: the high speed photogrammetry system comprises a high speed camera for taking pictures within its field of view and a host for controlling the high speed camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120434200.3U CN214621657U (en) | 2021-02-26 | 2021-02-26 | Non-contact dynamic measurement system for offshore wind turbine vibration and erosion test |
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| CN202120434200.3U CN214621657U (en) | 2021-02-26 | 2021-02-26 | Non-contact dynamic measurement system for offshore wind turbine vibration and erosion test |
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| CN214621657U true CN214621657U (en) | 2021-11-05 |
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| CN202120434200.3U Active CN214621657U (en) | 2021-02-26 | 2021-02-26 | Non-contact dynamic measurement system for offshore wind turbine vibration and erosion test |
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