Wind turbine tower monitoring system and method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUANENG GUANGDONG SHANTOU OFFSHORE WIND POWER CO LTD
- Filing Date
- 2025-02-07
- Publication Date
- 2026-08-07
AI Technical Summary
塔筒过大的倾斜变形会影响风力发电机组的正常运行，严重的还会产生安全事故
[0004]本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
Smart Images
Figure CN122523221A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wind turbine tower measurement technology, specifically to a wind turbine tower monitoring system and method. Background Technology
[0002] The wind turbine tower is the support structure of a wind turbine generator, primarily serving a supporting role while absorbing vibrations. The tower bears complex and variable loads such as thrust, bending moment, and torque, causing it to sway and twist during operation. Furthermore, the tower is also susceptible to tilting due to material deformation, component failure, and ground settlement. Excessive tilting can disrupt the normal operation of the wind turbine generator and, in severe cases, lead to safety accidents.
[0003] In related technologies, when measuring the tilt deformation of a tower, it is necessary to determine the static deformation of the tower under static wind load, the quasi-static deformation under quasi-static wind load, and the dynamic deformation under rapidly changing wind load. Then, the deformation equation of the tower is determined, and the deformation curve of the tower is obtained. However, the tower tilt deformation measurement system requires the construction of complex static and quasi-static deformation equations and dynamic deformation equations. In addition, tilt sensors and acceleration sensors are also required. The system is complex and the algorithm is complicated, resulting in high measurement costs. Summary of the Invention
[0004] The present invention aims to at least partially solve one of the technical problems in the related art.
[0005] To address this, this invention proposes a wind turbine tower monitoring system. This system can quickly acquire the vertical tilt of the tower, thereby determining whether the tower is tilted. The monitoring system is easy to deploy and has a low cost.
[0006] This invention also proposes a method for monitoring the tower of a wind turbine.
[0007] The wind turbine tower monitoring system of this invention includes:
[0008] Tower;
[0009] The measuring unit includes a liquid reservoir, a float plate, a positioning plate, and a distance measuring instrument. The liquid reservoir includes a first pipe and multiple branch pipes. The first pipe is a loop pipe connected end to end, located inside the tower and parallel to the end face of the tower. The branch pipes are arranged in pairs, with multiple branch pipes equally spaced along the circumference of the first pipe. The branch pipes extend along the extension direction of the tower and communicate with the first pipe. Liquid is stored in the first pipe and the branch pipes. The float plate corresponds to each branch pipe and is used to float within the branch pipe. The positioning plate is located corresponding to the liquid reservoir. The distance measuring instrument is located on the positioning plate corresponding to each branch pipe and is used to measure the distance between the float plate and the positioning plate.
[0010] The processor is electrically connected to the rangefinder and is used to collect the values measured by the rangefinder to obtain the vertical offset of the tower and determine whether the tower is tilted.
[0011] The wind turbine tower monitoring system of this invention can quickly obtain the vertical tilt of the tower and thus determine whether the tower is tilted. The monitoring system is easy to deploy and has a low cost.
[0012] In some embodiments, the end of the branch pipe away from the first pipe is sealed to the positioning plate, the liquid reservoir includes a second pipe, the second pipe is arranged parallel between the first pipe and the positioning plate, the second pipe is a ring pipe and communicates with a plurality of the branch pipes, and the distance between the second pipe and the positioning plate is less than the distance between the float plate and the positioning plate.
[0013] In some embodiments, a replenishment unit is included, which includes a replenishment tank, a replenishment pump, and a replenishment tube. The replenishment pump is disposed inside the replenishment tank, and the two ends of the replenishment tube are respectively connected to the replenishment pump and the reservoir for replenishing liquid into the first tube.
[0014] In some embodiments, a memory and a controller are included. The memory is electrically connected to the processor and stores a first liquid level warning value and a second liquid level warning value, wherein the first liquid level warning value is greater than the second liquid level warning value. The controller is electrically connected to the processor and to the replenishment pump. The controller is configured to control the replenishment pump to start operating when the maximum value measured by the rangefinder is equal to the first liquid level warning value, and to control the replenishment pump to stop operating when the minimum value measured by the rangefinder is equal to the second liquid level warning value.
[0015] In some embodiments, an alarm is included that is electrically connected to the controller, the memory stores an offset warning value for the vertical offset, and the controller is configured to control the alarm to issue an alarm signal when the vertical offset reaches the offset warning value.
[0016] In some embodiments, a display electrically connected to the processor is included, the display being used to display in real time the values measured by the plurality of rangefinders and the vertical offset.
[0017] In some embodiments, the tower includes multiple tower sections, and the measuring unit is provided in multiple ways and is arranged in a one-to-one correspondence with each tower section.
[0018] The wind turbine tower monitoring method of this invention includes the wind turbine tower monitoring system of any of the above embodiments, and includes the following steps:
[0019] S1: Number multiple rangefinders sequentially along the axial direction as 1, 2...n, n+1, n+2...2n, and record the distances between the floating board and the positioning board measured by the corresponding rangefinders as L1, L2...L... n L n+1 L n+2 ......L 2n ;
[0020] S2: Connect two rangefinders set in pairs and numbered i and n+i, and define the extension direction of the connecting line as A. i The tower is at A i The vertical offset in the direction is: X i =|L i -L n+i | / 2, where i is an integer and n≥i≥1;
[0021] S3: Record the vertical offsets corresponding to the n directions;
[0022] S4: The processor compares the vertical offsets in n directions with 0. If at least one of the n vertical offsets satisfies: X i If X > 0, then the tower has an offset. If all n vertical offsets satisfy: X i =0, then the tower has no offset.
[0023] In some embodiments, the system includes a replenishment unit, a memory, and a controller. The memory contains a first liquid level warning value and a second liquid level warning value. The first liquid level warning value is greater than the second liquid level warning value. When the maximum value measured by multiple rangefinders is equal to the first liquid level warning value, the controller controls the replenishment unit to start replenishment operations. When the minimum value measured by multiple rangefinders is equal to the second liquid level warning value, the controller controls the replenishment unit to stop replenishment operations.
[0024] In some embodiments, an alarm electrically connected to the controller is included, and an offset warning value is stored in the memory. When the vertical offset is greater than 0 and less than the offset warning value, the controller controls the alarm to issue a first alarm signal; when the vertical offset is equal to the offset warning value, the controller controls the alarm to issue a second alarm signal. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of the wind turbine tower monitoring system according to an embodiment of the present invention.
[0026] Figure 2 This is a schematic diagram showing the connection between the measurement unit and the tower in the wind turbine tower monitoring system of this invention.
[0027] Figure 3 This is a schematic diagram of the structure of the measurement unit in the wind turbine tower monitoring system according to an embodiment of the present invention.
[0028] Figure 4 This is a cross-sectional view of the measurement unit in the wind turbine tower monitoring system according to an embodiment of the present invention.
[0029] Figure label:
[0030] Tower 1; Measuring unit 2; Liquid reservoir 21; First pipe 211; Branch pipe 212; Second pipe 213; Floating plate 22; Positioning plate 23; Rangefinder 24; Processor 3; Memory 4; Controller 5; Alarm 6; Display 7. Detailed Implementation
[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the wind turbine tower monitoring system of this embodiment includes a tower 1, a measuring unit 2, and a processor 3. The measuring unit 2 includes a liquid reservoir 21, a floating plate 22, a positioning plate 23, and a rangefinder 24. The liquid reservoir 21 includes a first pipe 211 and multiple branch pipes 212. The first pipe 211 is a loop pipe connected end to end. The first pipe 211 is located inside the tower 1 and parallel to the end face of the tower 1. The branch pipes 212 are arranged in pairs, and multiple branch pipes 212 are equally spaced along the circumference of the first pipe 211. The branch pipes 212 extend along the extension direction of the tower 1. The first pipe 211 and the branch pipe 212 are connected to each other. Liquid is stored in the first pipe 211 and the branch pipe 212. The floating plate 22 corresponds to the branch pipe 212 and is used to float in the branch pipe 212. The positioning plate 23 is set in relation to the liquid reservoir 21. The rangefinder 24 is set on the positioning plate 23 in relation to the branch pipe 212. The rangefinder 24 is used to measure the distance between the floating plate 22 and the positioning plate 23. The processor 3 is electrically connected to the rangefinder 24. The processor 3 is used to collect the values measured by the rangefinder 24 to obtain the vertical offset of the tower 1 and to determine whether the tower 1 is tilted.
[0033] The working principle of the wind turbine tower monitoring system in this embodiment of the invention is as follows: The liquid reservoir 21 forms a communicating vessel through a first pipe 211 and multiple branch pipes 212. When the liquid reservoir 21 is in a horizontal or tilted state, the liquid levels in the multiple branch pipes 212 are all at the same horizontal height. During the initial installation of the tower 1, it is in a vertical state, and the distance from the liquid level in each branch pipe 212 to the position plate 23 is equal. At this time, the distance values measured by the multiple rangefinders 24 are equal. When the tower 1 tilts, the liquid reservoir 21 tilts simultaneously, and the distance from the liquid level in each branch pipe 212 to the position plate 23 changes. The multiple branch pipes 212... The first pipe 211 is paired and equally spaced, that is, there are two symmetrically arranged branch pipes 212 in the radial direction of the tower 1. The two symmetrical branch pipes 212 are connected, and the corresponding two distance measuring instruments 24 measure the distance between the changed liquid level and the positioning plate 23 through the float plate 22. Half of the difference between the two distance values is the vertical offset in the direction of the corresponding connection. Repeat the above steps to calculate and analyze the data measured by multiple pairs of distance measuring instruments 24 to obtain multiple vertical offset values. If the values of multiple vertical offset values are 0, no tilting occurs. If one of the values of multiple vertical offset values is not 0, the tower 1 tilts.
[0034] The wind turbine tower monitoring system of this invention can quickly obtain the vertical tilt of the tower 1, thereby determining whether the tower 1 is tilted and the tilt direction. The monitoring system is easy to deploy and has a low cost.
[0035] Optionally, the rangefinder 24 is a laser infrared rangefinder 24, and the processor 3 and the rangefinder 24 are connected to the built-in power storage module of the wind turbine.
[0036] Optionally, the liquid stored in the reservoir 21 is water.
[0037] In some embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, the end of the branch pipe 212 away from the first pipe 211 is sealed and connected to the positioning plate 23. The reservoir 21 includes a second pipe 213, which is arranged parallel between the first pipe 211 and the positioning plate 23. The second pipe 213 is a ring pipe and is connected to multiple branch pipes 212. The distance between the second pipe 213 and the positioning plate 23 is less than the distance between the float plate 22 and the positioning plate 23.
[0038] Specifically, the top of the branch pipe 212 is bonded to the positioning pipe with sealant to prevent the liquid in the first pipe 211 and the branch pipe 212 from vaporizing and escaping from the end of the branch pipe 212 away from the first pipe 211. This avoids the liquid level in the reservoir 21 from failing to meet the measurement requirements after the system has been running for a period of time. At the same time, a second pipe 213 is set and its height relative to the first pipe 211 is restricted. Multiple branch pipes 212 are connected through the second pipe 213 to ensure the airflow between multiple branch pipes 212 and to make the air pressure in each branch pipe 212 equal. When the reservoir 21 tilts with the tower 1, it avoids the formation of a sealed air cavity between the top of the liquid level in the branch pipe 212 and the positioning plate 23, which would interfere with the flow of liquid and prevent the formation of a communicating vessel. This ensures the authenticity of the liquid level in the branch pipe 212 and the measurement accuracy of the rangefinder 24.
[0039] In some embodiments, a replenishment unit is included, which includes a replenishment tank, a replenishment pump, and a replenishment pipe. The replenishment pump is located inside the replenishment tank, and the two ends of the replenishment pipe are respectively connected to the replenishment pump and the reservoir 21 for replenishing liquid into the first pipe 211.
[0040] Specifically, the replenishment pipe passes through and connects to the positioning plate 23. One end of the replenishment pipe passes through the replenishment tank and connects to the outlet of the replenishment pump. The other end of the replenishment pipe extends into the corresponding branch pipe 212. It should be noted that the replenishment pipe is fixedly connected to the side wall of the branch pipe 212. Regardless of whether the storage tank is in a vertical or inclined state, the replenishment pipe will not interfere with the measurement of the rangefinder 24. By replenishing the liquid in the branch pipe 212 and the first pipe 211, the accurate display of the water level by the float plate 22 is ensured, thus ensuring the accuracy of the measurement by the rangefinder 24.
[0041] In some embodiments, such as Figure 1As shown, the system includes a memory 4 and a controller 5. The memory 4 is electrically connected to the processor 3 and stores a first liquid level warning value and a second liquid level warning value. The first liquid level warning value is greater than the second liquid level warning value. The controller 5 is electrically connected to the processor 3 and to the replenishment pump. The controller 5 is used to control the replenishment pump to start operating when the maximum value measured by the rangefinder 24 is equal to the first liquid level warning value, and to control the replenishment pump to stop operating when the minimum value measured by the rangefinder 24 is equal to the second liquid level warning value.
[0042] Specifically, the length of the portion of branch pipe 212 located between the first pipe 211 and the second pipe 213 is defined as the first value, the distance from the marker position represented by the first liquid level warning value to the first pipe 211 is defined as the second value, and the distance from the marker position represented by the second liquid level warning value to the second pipe 213 is defined as the third value. The second value must be less than the third value, and the second value must be no less than one-third and no greater than two-thirds of the first value. The third value must be no less than one-third and no greater than two-thirds of the first value. During system operation, the processor 3 and controller 5 monitor the position of the float plate 22. When the measured value reaches the first liquid level warning value, i.e., the distance from the water level in the corresponding branch pipe 212 to the first pipe 211 reaches the first value, the controller 5 controls the replenishment pump to deliver water into the main pipe. When the measured value reaches the second liquid level warning value, i.e., the distance from the corresponding water level in the corresponding branch pipe 212 to the first pipe 211 reaches the second value, and the water level after replenishment meets the measurement requirements, the controller 5 controls the replenishment pump to stop operating.
[0043] Optionally, the length of the branch pipe 212 located between the first pipe 211 and the second pipe 213 is 45cm. The position corresponding to the first warning value on the branch pipe 212 is set at a distance of 15cm from the first pipe 211, and the position corresponding to the second warning value on the branch pipe 212 is set at a distance of 30cm from the first pipe 211.
[0044] In some embodiments, such as Figure 1 As shown, the device includes an alarm 6 electrically connected to the controller 5. The memory 4 stores the offset warning value of the vertical offset. The controller 5 is used to control the alarm 6 to issue an alarm signal when the vertical offset reaches the offset warning value.
[0045] An alarm 6 is set up to compare the vertical offset obtained by the rangefinder 24 with the offset warning value. When the vertical offset is too large and reaches the offset warning value, an alarm is issued so that personnel can stop the wind turbine operation in time and carry out maintenance on the tower 1 to ensure the safe operation of the wind turbine.
[0046] In some embodiments, such as Figure 1As shown, it includes a display 7 electrically connected to the processor 3. The display 7 is used to display the values and vertical offsets measured by multiple rangefinders 24 in real time. By setting the display 7, the position changes of the floating plate 22 in the branch pipe 212 corresponding to multiple rangefinders 24 and the corresponding offsets in multiple directions can be observed in the branch pipe 212, which is convenient for personnel to conduct technical observation.
[0047] In some embodiments, the tower 1 includes multiple tower sections, and the measuring unit 2 is provided with multiple units, each corresponding to one tower section. By monitoring each tower section separately, the vertical offsets of the multiple tower sections can be compared to determine the inclination consistency between the multiple tower sections. If there are unequal vertical offsets, there is a fault at the connection of the tower sections, which facilitates quick maintenance by personnel.
[0048] The following describes a wind turbine tower monitoring method according to an embodiment of the present invention.
[0049] The wind turbine tower monitoring method of this invention includes the following steps, as described in any of the above-described wind turbine tower monitoring systems:
[0050] S1: Number multiple rangefinders sequentially along the axial direction as 1, 2...n, n+1, n+2...2n, and record the distances between the floating board and the positioning board measured by the corresponding rangefinders as L1, L2...L... n L n+1 L n+2 ......L 2n ;
[0051] S2: Connect two rangefinders set in pairs and numbered i and n+i, and define the extension direction of the connecting line as A. i The tower is at A i The vertical offset in the direction is: X i =|L i -L n+i | / 2, where i is an integer and n≥i≥1;
[0052] For example, if two rangefinders are connected in pairs and numbered 1 and n+1, and the extension direction of the connecting line is defined as A1, the vertical offset of the tower in the A1 direction is: X1 = |L1 - L n+1 | / 2, connect two rangefinders set in pairs and numbered 2 and n+2, and define the extension direction of the connection line as A2. The vertical offset of the tower in the A2 direction is: X2=|L2-L n+2 | / 2...... Connect two rangefinders set up in pairs and numbered n and 2n, and define the extension direction of the connecting line as A. n The tower is at A n The vertical offset in the direction is: Xn =|L n -L 2n | / 2.
[0053] S3: Record the vertical offsets corresponding to the n directions;
[0054] S4: The processor compares the vertical offsets in n directions with 0. If at least one of the n vertical offsets satisfies: X i If X > 0, then the tower has an offset. If all n vertical offsets satisfy: X i =0, then the tower has no offset.
[0055] The wind turbine tower monitoring method of this invention is simple to operate, can quickly obtain the vertical offset of the tower, is convenient and efficient, can determine the tilt direction of the tower, is safe and reliable, and reduces the cost of tower monitoring.
[0056] In some embodiments, the system includes a replenishment unit, a memory, and a controller. The memory contains a first liquid level warning value and a second liquid level warning value. When the first liquid level warning value is greater than the second liquid level warning value, and the maximum value measured by multiple rangefinders is equal to the first liquid level warning value, the controller controls the replenishment unit to start replenishment operations. When the minimum value measured by multiple rangefinders is equal to the second liquid level warning value, the controller controls the replenishment unit to stop replenishment operations.
[0057] By setting a replenishment unit, a first liquid level warning value, and a second liquid level warning value, it is convenient to monitor and replenish the liquid in the branch pipe, ensuring the effective movement distance of the float plate and ensuring the accuracy of the values measured by the rangefinder.
[0058] In some embodiments, an alarm electrically connected to the controller is included, and an offset warning value is stored in the memory. When the vertical offset is greater than 0 and less than the offset warning value, the controller controls the alarm to issue a first alarm signal; when the vertical offset is equal to the offset warning value, the controller controls the alarm to issue a second alarm signal.
[0059] The first and second alarm signals from the first alarm device allow personnel to quickly assess the tilt of the tower, enabling timely and appropriate measures to be taken, ensuring safety and reliability.
[0060] Optionally, the first alarm signal uses a yellow warning light and a voice alarm saying "The tower is tilting," and the second alarm signal uses a red warning light and a voice alarm saying "The tower needs maintenance."
[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A wind turbine tower monitoring system, characterized in that, include: Tower; The measuring unit includes a liquid reservoir, a float plate, a positioning plate, and a distance measuring instrument. The liquid reservoir includes a first pipe and multiple branch pipes. The first pipe is a loop pipe connected end to end, located inside the tower and parallel to the end face of the tower. The branch pipes are arranged in pairs, with multiple branch pipes equally spaced along the circumference of the first pipe. The branch pipes extend along the extension direction of the tower and communicate with the first pipe. Liquid is stored in the first pipe and the branch pipes. The float plate corresponds to each branch pipe and is used to float within the branch pipe. The positioning plate is located corresponding to the liquid reservoir. The distance measuring instrument is located on the positioning plate corresponding to each branch pipe and is used to measure the distance between the float plate and the positioning plate. The processor is electrically connected to the rangefinder and is used to collect the values measured by the rangefinder to obtain the vertical offset of the tower and determine whether the tower is tilted.
2. The wind turbine tower monitoring system according to claim 1, characterized in that, The end of the branch pipe away from the first pipe is sealed to the positioning plate. The liquid reservoir includes a second pipe, which is arranged parallel between the first pipe and the positioning plate. The second pipe is a ring pipe and communicates with multiple branch pipes. The distance between the second pipe and the positioning plate is less than the distance between the float plate and the positioning plate.
3. The wind turbine tower monitoring system according to claim 1 or 2, characterized in that, The system includes a replenishment unit, which comprises a replenishment tank, a replenishment pump, and a replenishment tube. The replenishment pump is located inside the replenishment tank, and the two ends of the replenishment tube are connected to the replenishment pump and the reservoir, respectively, for replenishing liquid into the first tube.
4. The wind turbine tower monitoring system according to claim 3, characterized in that, The system includes a memory and a controller. The memory is electrically connected to the processor and stores a first liquid level warning value and a second liquid level warning value, wherein the first liquid level warning value is greater than the second liquid level warning value. The controller is electrically connected to the processor and to the replenishment pump. The controller is used to control the replenishment pump to start operating when the maximum value measured by the rangefinder is equal to the first liquid level warning value, and to control the replenishment pump to stop operating when the minimum value measured by the rangefinder is equal to the second liquid level warning value.
5. The wind turbine tower monitoring system according to claim 4, characterized in that, The system includes an alarm that is electrically connected to the controller. The memory stores an offset warning value for the vertical offset. The controller is used to control the alarm to issue an alarm signal when the vertical offset reaches the offset warning value.
6. The wind turbine tower monitoring system according to claim 1, characterized in that, Includes a display electrically connected to the processor, the display being used to display in real time the values measured by the plurality of rangefinders and the vertical offset.
7. The wind turbine tower monitoring system according to claim 1, characterized in that, The tower comprises multiple tower sections, and the measuring unit is provided in multiple ways, each corresponding to one of the tower sections.
8. A method for monitoring the tower of a wind turbine, characterized in that, The wind turbine tower monitoring system according to any one of claims 1-7 includes the following steps: S1: Number multiple rangefinders sequentially along the axial direction as 1, 2...n, n+1, n+2...2n, and record the distances between the floating board and the positioning board measured by the corresponding rangefinders as L1, L2...L... n L n+1 L n+2 ......L 2n ; S2: Connect two rangefinders set in pairs and numbered i and n+i, and define the extension direction of the connecting line as A. i The tower is at A i The vertical offset in the direction is: X i =|L i -L n+i | / 2, where i is an integer and n≥i≥1; S3: Record the vertical offsets corresponding to the n directions; S4: The processor compares the vertical offsets in n directions with 0. If at least one of the n vertical offsets satisfies: X i If X > 0, then the tower has an offset. If all n vertical offsets satisfy: X i =0, then the tower has no offset.
9. The wind turbine tower monitoring method according to claim 8, characterized in that, It includes a liquid replenishment unit, a memory, and a controller. The memory contains a first liquid level warning value and a second liquid level warning value. When the first liquid level warning value is greater than the second liquid level warning value, and the maximum value measured by multiple rangefinders is equal to the first liquid level warning value, the controller controls the liquid replenishment unit to start the liquid replenishment operation. When the minimum value measured by multiple rangefinders is equal to the second liquid level warning value, the controller controls the liquid replenishment unit to stop the liquid replenishment operation.
10. The wind turbine tower monitoring method according to claim 9, characterized in that, The system includes an alarm that is electrically connected to the controller. The memory stores an offset warning value. When the vertical offset is greater than 0 and less than the offset warning value, the controller controls the alarm to issue a first alarm signal. When the vertical offset is equal to the offset warning value, the controller controls the alarm to issue a second alarm signal.