An offshore wind turbine tower deformation measurement device and method

Abstract

The present invention discloses a device and method for measuring the deformation of an off - shore wind turbine tower, which relates to the technical field of intelligent monitoring of ocean structure engineering. It includes: a lateral displacement monitoring module is fixedly installed on the top outside the nacelle, and a laser monitoring module is adaptively installed inside the tower. The lateral displacement monitoring module and the laser monitoring module are both signal - connected to the monitoring unit, and the monitoring unit aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to calculate the deformation of the off - shore wind turbine tower. The present invention simultaneously obtains the lateral displacement of the tower by using two monitoring means, compares and analyzes the displacement values obtained by the two means, takes into account the calculation errors of the two methods, finally calculates a monitoring result of the lateral displacement of the tower, and gives an alarm in time for the over - limit result. The present invention uses two means to conduct real - time comparative monitoring of the tower deformation, greatly improving the accuracy of the monitoring result and avoiding errors and interference.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent monitoring of ocean structure engineering, and more specifically, to a device and method for measuring the deformation of an off - shore wind turbine tower barrel. Background Art

[0002] Wind energy is formed due to the uneven heating of the earth's surface by solar radiation. It is a green energy source. Wind power generation can effectively utilize wind energy without damaging the natural environment while obtaining energy. As an important part of green energy, off - shore wind turbines have broad development prospects in terms of market demand, technical characteristics, policy support, etc. Compared with land, the ocean has a vast area and rich wind energy resources, especially in the deep - sea and far - sea areas, the wind energy resources are even more abundant.

[0003] The tower barrel of a wind turbine is a load - bearing component in the wind power generation unit, mainly playing a supporting role in the wind power generation unit and absorbing the vibration of the unit at the same time. The wind speed at sea is often higher than that on land, and the wind direction changes frequently. This unstable wind load causes the tower barrel to bear continuous dynamic stress, resulting in a certain degree of swaying and twisting deformation of the tower barrel during the operation of the wind power generation unit. Excessive deformation of the tower barrel will affect the normal operation of the wind power generation unit, and in severe cases, it will even cause safety accidents. Therefore, it is necessary to monitor the deformation of the tower barrel in real - time.

[0004] At present, the deformation monitoring of off - shore wind turbine tower barrels mainly relies on traditional automated monitoring systems. The core component, the sensor, due to its own limitations, installation errors or insufficient calibration and other factors, limits the accuracy of the collected data. This kind of error has a tendency to gradually amplify with the accumulation of time, weakening the reliability of the monitoring results. In addition, in the actual application of the automated monitoring system, adverse factors such as electromagnetic field interference and environmental noise in the external environmental conditions may further weaken the stability of the measurement results, leading to deviations or distortions in the monitoring data.

[0005] Therefore, how to propose a device and method for measuring the deformation of an off - shore wind turbine tower barrel, reduce the problem of the difference between the analytical calculation result of the lateral displacement and the actual situation while reducing the error of laser monitoring data, improve the accuracy of the monitoring results, and avoid the deviation or distortion of the monitoring data caused by external environmental conditions is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a device and method for measuring the deformation of an off - shore wind turbine tower barrel, which can reduce the problem of the difference between the analytical calculation result of the lateral displacement and the actual situation while reducing the error of laser monitoring data, improve the accuracy of the monitoring results, and avoid the deviation or distortion of the monitoring data caused by external environmental conditions. To achieve the above - mentioned purpose, the present invention adopts the following technical solutions:

[0007] A device for measuring the deformation of an offshore wind turbine tower, comprising:

[0008] A lateral displacement monitoring module, a laser monitoring module, a monitoring unit and a wind turbine tower. The wind turbine tower includes a nacelle, a tower and a working platform which are hermetically connected. The lateral displacement monitoring module is fixedly installed on the outer top of the nacelle. The laser monitoring module is adaptively installed inside the tower. The lateral displacement monitoring module and the laser monitoring module are both signal-connected to the monitoring unit. The monitoring unit aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to measure the deformation of the offshore wind turbine tower.

[0009] Optionally, the laser monitoring module includes a laser emitting unit and a photoelectric receiving unit. The laser emitting unit is fixedly installed at the top of the inner wall of the tower, near the connection between the nacelle and the tower. The photoelectric receiving unit is fixedly installed on the working platform at the bottom inside the tower. The laser emitted by the laser emitting unit is projected onto the center of the photoelectric receiving unit.

[0010] Optionally, the lateral displacement monitoring module includes a wind speed sensing unit, and the wind speed sensing unit is signal-connected to the monitoring unit.

[0011] Optionally, it further includes an offshore wind power monitoring center, and the monitoring unit is placed in the offshore wind power monitoring center.

[0012] Optionally, the laser emitting unit, the photoelectric receiving unit and the wind speed sensing unit are all data-connected to the monitoring unit in the offshore wind power monitoring center through submarine optical fiber cables.

[0013] Optionally, the monitoring unit is built with MATLAB software. In the MATLAB software, a lateral displacement analysis calculation formula is loaded, and the material data and dimensions of the tower are imported as the pre-input parameters in the lateral displacement analysis calculation process for subsequent lateral displacement analysis calculation.

[0014] Optionally, the receiving component of the photoelectric receiving unit is in the shape of a disc, and a circular warning line is provided on the disc. The diameter of the circular warning line is determined according to the tower deformation specification, and the diameter of the disc is n times the diameter of the circular warning line.

[0015] Optionally, it further includes an over-limit alarm system. According to the calculated displacement data, the tower displacement response during the construction stage of the offshore wind turbine and the law of horizontal displacement change of the tower under the normal working state of the offshore wind turbine are obtained. An alarm is given according to the received signal of the tower deformation exceeding the limit.

[0016] Optionally, a method for measuring the deformation of an offshore wind turbine tower, which is applied to any one of the above-mentioned devices for measuring the deformation of an offshore wind turbine tower, includes:

[0017] Measure the wind force data through the wind speed sensing unit, transmit the wind force data to the monitoring unit, and then the monitoring unit equivalentizes the transmitted wind force data into the bending moment and shear force applied to the tower barrel. The monitoring unit respectively imports the equivalent bending moment and shear force into the calculation formula carried by the MATLAB software for calculation to obtain the real-time lateral displacement at different heights of the tower barrel.

[0018] Based on the laser emission unit installed at the top of the inner wall of the tower barrel and the photoelectric receiving unit installed at the bottom of the tower barrel, when the tower barrel deforms, the laser projection position changes and is received by the area around the center point of the photoelectric receiving unit, so as to calculate the distance from the receiving point to the center point, and this distance is the displacement that occurs at the top of the tower barrel.

[0019] Compare the numerical values of the two results. If the difference between the numerical values of the two results does not exceed 20% of the smaller value of the numerical values of the two results, the final result takes the average value of the two results as the real-time lateral displacement of the tower barrel.

[0020] If the difference between the numerical values of the two results is greater than 20% of the smaller value of the numerical values of the two results, it is considered that the error of the laser monitoring method is too large, and the final result selects the result based on the analytical calculation of the lateral displacement as the real-time lateral displacement of the tower barrel.

[0021] Optionally, it further includes: when the monitoring results of both monitoring methods exceed the warning line, the monitoring unit gives an alarm; when the monitoring result of the laser monitoring method exceeds the warning line, but the calculation result of the analytical calculation of the lateral displacement does not exceed the warning line, then compare whether the difference between the numerical values of the two results does not exceed 20% of the smaller value of the numerical values of the two results. If it does not exceed 20%, it is necessary to compare whether the average value of the two results exceeds the lateral deformation limit value; if it is greater than 20%, it is considered that the error of the laser monitoring method is too large, and the final result selects the result based on the analytical calculation of the lateral displacement as the real-time lateral displacement of the tower barrel; when the calculation result of the analytical calculation of the lateral displacement exceeds the warning line, but the monitoring result of the laser monitoring method does not exceed the warning line, the monitoring unit gives an alarm.

[0022] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a device and method for measuring the deformation of an offshore wind turbine tower barrel, which has the following beneficial effects:

[0023] The present invention proposes a device for measuring the deformation of an offshore wind turbine tower barrel, including: a lateral displacement monitoring module, a laser monitoring module, a monitoring unit and a wind turbine tower barrel. The wind turbine tower barrel includes a nacelle, a tower barrel and a working platform that are hermetically connected. The lateral displacement monitoring module is fixedly installed on the outer top of the nacelle, the laser monitoring module is adaptively installed inside the tower barrel, the lateral displacement monitoring module and the laser monitoring module are both signal-connected to the monitoring unit, and the monitoring unit aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to measure the deformation of the offshore wind turbine tower barrel.

[0024] The present invention is monitored by two different monitoring methods simultaneously, and the two methods are compared for monitoring. The monitoring results have high accuracy. While reducing the error of laser monitoring data, the problem that the analytical calculation result of the lateral displacement is different from the actual situation is reduced; except for the wind speed sensing unit, other units of the measuring device are placed inside the tower barrel, avoiding damage to the device caused by the harsh marine environment and increasing the service life of each unit. It has fewer components, is easy to install, and has low cost. Compared with the traditional automatic monitoring system that needs to be installed during the construction process of the tower barrel, it only needs to be installed after the construction of the tower barrel is completed, and can even be installed inside the tower barrel of an offshore wind turbine that has already been put into use; the transmitted data is simple, which is convenient for the monitoring unit to sort out and record, and can provide data reference for the construction of other offshore wind turbines; it can measure the deformation of the tower barrel during the construction of the offshore wind turbine in real time and accurately, as well as the displacement generated by the tower barrel under the normal working state of the offshore wind turbine; when it is detected that the tower barrel has irreversible deformation, the monitoring unit will give an alarm in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0026] Figure 1 It is a schematic structural diagram of a device for measuring the deformation of an offshore wind turbine tower barrel provided by the present invention.

[0027] Figure 2 It is a schematic flow diagram of a method for measuring the deformation of an offshore wind turbine tower barrel provided by the present invention.

[0028] Among them, 1. Tower barrel; 2. Working platform; 3. Sea level; 4. Laser emitting unit; 5. Photoelectric receiving unit; 6. Submarine optical fiber cable; 7. Monitoring unit; 8. Wind speed sensing unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] An embodiment of the present invention discloses a device for measuring the deformation of an offshore wind turbine tower barrel, as Figure 1 shown, including:

[0031] A lateral displacement monitoring module, a laser monitoring module, a monitoring unit 7 and a wind turbine tower. The wind turbine tower includes a nacelle, a tower 1 and a working platform 2 which are hermetically connected. The lateral displacement monitoring module is fixedly installed on the outer top of the nacelle. The laser monitoring module is adaptively installed inside the tower 1. The lateral displacement monitoring module and the laser monitoring module are both signal-connected to the monitoring unit 7. The monitoring unit 7 aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to calculate the deformation of the offshore wind turbine tower.

[0032] Furthermore, the laser monitoring module includes a laser emitting unit 4 and a photoelectric receiving unit 5. The laser emitting unit 4 is fixedly installed at the top inner wall of the tower 1, near the connection between the nacelle and the tower 1. The photoelectric receiving unit 5 is fixedly installed on the working platform 2 at the bottom inside the tower 1. The laser emitted by the laser emitting unit 4 is projected onto the center of the photoelectric receiving unit 5. The tower 1 is a hollow structure.

[0033] Specifically, the laser emitting unit 4 is in a vertical state with the horizontal plane, fixed to the inner wall at the top of the tower, near the bottom of the connection between the nacelle of the wind turbine and the tower 1, and not connected to the rotating track of the power generation device. The photoelectric receiving unit 5 is parallel to the horizontal plane, fixed on the working platform 2 at the bottom inside the tower 1. The laser emitted by the laser emitting unit 4 is projected onto the center of the photoelectric receiving unit 5. The wind speed sensing unit 8 is placed on the outer top of the offshore wind turbine.

[0034] Furthermore, the lateral displacement monitoring module includes a wind speed sensing unit 8, and the wind speed sensing unit 8 is signal-connected to the monitoring unit 7.

[0035] Furthermore, it further includes an offshore wind power monitoring center, and the monitoring unit 7 is placed in the offshore wind power monitoring center.

[0036] Furthermore, the laser emitting unit 4, the photoelectric receiving unit 5 and the wind speed sensing unit 8 are all data-connected to the monitoring unit 7 in the offshore wind power monitoring center through a submarine optical fiber cable 6 to transmit data in real time.

[0037] Furthermore, the monitoring unit 7 is built-in with MATLAB software. A program for lateral displacement analysis and calculation is loaded in the MATLAB software. The material data and dimensions of the tower are imported as the pre-input parameters in the process of lateral displacement analysis and calculation for subsequent lateral displacement analysis and calculation. The monitoring unit converts the transmitted real-time wind force data into the bending moment and shear force applied to the tower and imports them into the lateral displacement analysis calculation formula loaded in the MATLAB software to calculate the real-time lateral displacement at different heights. At the same time, the monitoring unit 7 needs to set limit values and an over-limit alarm system, and its limit values are determined based on the relevant specifications of tower deformation.

[0038] In the specific implementation manner, the formula used by the lateral displacement analysis and calculation program is as follows:

[0039] ;

[0040] ;

[0041] ;

[0042] ;

[0043] ;

[0044] ;

[0045] ;

[0046] Among them, formula (1) is the general solution of the dynamic control equation , cosh(x) and sinh(x) are hyperbolic functions, O 1 、O 2 、O 3 、O 4 、 are undetermined coefficients; i is the imaginary unit; is the elastic modulus of the tower barrel material; is the complex elastic modulus of the tower barrel material; is the hysteretic damping of the tower barrel material; is the moment of inertia of the cross-section of the tower barrel structure; is the mass per unit length of the tower barrel; Z is the height of the tower barrel; is the height at any point of the tower barrel; are the bending moment, shear force, and load frequency applied to the tower barrel respectively.

[0047] Furthermore, the shape of the receiving component of the photoelectric receiving unit 5 is a disc, and a circular warning line is provided on the disc. The diameter of the circular warning line is determined according to the tower barrel deformation specification, and the diameter of the disc is n times the diameter of the circular warning line, preferably 1.5 times.

[0048] Furthermore, a limit value of the lateral displacement and an over-limit alarm system are set in the monitoring unit 7. This limit value It is determined by the relevant specifications for tower barrel deformation. The over-limit alarm system obtains the tower barrel displacement response during the construction stage of the offshore wind turbine and the variation law of the horizontal displacement of the tower barrel under the normal working state of the offshore wind turbine based on the calculated displacement data; and gives an alarm according to the received signal of the over-limit deformation of the tower barrel.

[0049] In a specific implementation manner, a method for measuring the deformation of an offshore wind turbine tower barrel is applied to any one of the described devices for measuring the deformation of an offshore wind turbine tower barrel, as Figure 2 shown, and includes:

[0050] Step 1: Arrangement of the monitoring unit 7 and settings for the analytical calculation of the lateral displacement: The monitoring unit 7 is placed in the offshore monitoring center; the software for the analytical calculation of the lateral displacement is MATLAB software, and a program for the analytical calculation of the lateral displacement is written in the MATLAB software; collect the material properties and structural dimensions of the offshore wind turbine tower barrel, and import these data into the displacement calculation program written in the MATLAB software; finally, set the limit value of the lateral displacement and the over-limit alarm system in the monitoring unit 7, and this limit value is determined by the relevant specifications for tower barrel deformation;

[0051] Step 2: Determine the relevant data of the receiving component of the photoelectric receiving unit 5: The shape of the receiving component of the photoelectric receiving unit 5 is a disc, and a circular warning line is provided on the disc. The diameter of the circular warning line is determined based on the relevant specifications for tower barrel deformation, and the diameter of the disc is set to 1.5 times the diameter of the circular warning line;

[0052] Step 3: Arrangement of the laser emitting unit 4, the photoelectric receiving unit 5 and the wind speed sensing unit 8: The laser emitting unit 4 is installed at the topmost part of the inner wall of the tower barrel, at the bottom of the connection with the nacelle of the wind turbine, and is attached to the inner wall of the tower barrel 1; according to the position of the laser emitting unit 4, the photoelectric receiving unit 5 is installed at the bottom inside the tower barrel 1 to ensure that in the initial state of the tower barrel 1, the laser emitted by the laser emitting unit 4 falls on the center of the photoelectric receiving unit 5, and thus the initial state of the monitoring device is determined; the wind speed sensing unit 8 is placed at the top outside the offshore wind turbine; the laser emitting unit 4, the photoelectric receiving unit 5 and the wind speed sensing unit 8 are connected to the monitoring unit 7 in the offshore monitoring center through the submarine optical fiber cable 6 to form a monitoring system;

[0053] Step 4: Measurement. Two monitoring methods are used for simultaneous calculation. One is analytical calculation. First, the wind force data measured by the wind speed sensing unit 8 is transmitted to the monitoring unit 7. Then, the monitoring unit converts the transmitted wind force data into the bending moment and shear force applied to the tower barrel. Finally, the monitoring unit 7 respectively imports the equivalent bending moment and shear force into the program written in the MATLAB software for calculation to obtain the real-time lateral displacement at different heights of the tower barrel 1. The other is laser monitoring. Based on the laser emitting unit 4 installed at the top of the inner wall of the tower barrel 1 and the photoelectric receiving unit 5 installed at the bottom inside the tower barrel, when the tower barrel 1 deforms, the laser projection position changes and is received by the area around the center point of the photoelectric receiving unit 5. Thus, the distance from the receiving point to the center point can be calculated, and this distance is the displacement occurring at the top of the tower barrel.

[0054] Step 5: Compare and determine the final result. After obtaining the lateral displacement results of the two monitoring methods for the tower barrel, the values of the two results are compared. If the difference between the two result values does not exceed 20% of the smaller value of the two result values, to improve the accuracy of the result, the final result takes the average of the two results as the real-time lateral displacement of the tower barrel 1. If the difference between the two result values is greater than 20% of the smaller value of the two result values, it is considered that the error of the laser monitoring method is too large, and the final result selects the result based on the analytical calculation of the lateral displacement as the real-time lateral displacement of the tower barrel 1.

[0055] Step 6: When U Z > , the monitoring device based on the analytical calculation of the lateral displacement will give an alarm in time; when the laser is received at a position outside the warning line of the photoelectric receiving unit, the laser monitoring device will give an alarm in time. The warning lines of the two monitoring methods are determined according to the relevant specifications of the tower barrel deformation, and the lateral deformation limits are the same. When the monitoring results of the two monitoring methods both exceed the warning line, the monitoring unit 7 will give an alarm in time. When the monitoring result of the laser monitoring method exceeds the warning line, but the calculation result U Z of the analytical calculation of the lateral displacement does not exceed the warning line, it is necessary to compare whether the difference between the two result values does not exceed 20% of the smaller value of the two result values. If it does not exceed 20%, it is necessary to compare whether the average of the two results exceeds the deformation limit. If it is greater than 20%, it is considered that the error of the laser monitoring method is too large. When the calculation result U Z > of the analytical calculation of the lateral displacement exceeds the warning line, but the monitoring result of the laser monitoring method does not exceed the warning line, the monitoring unit 7 will give an alarm in time;

[0056] Step 7: Based on the finally obtained real-time displacement data, the displacement response of the tower barrel during the construction stage of the offshore wind turbine can be obtained, as well as the variation law of the horizontal displacement of the tower barrel under the normal working state of the offshore wind turbine; at the same time, a signal of excessive deformation of the tower barrel 1 is received in time and a quick response is made.

[0057] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, reference can be made to the description in the method section.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for measuring the deformation of an off - shore wind turbine tower, characterized in that, Including: Applying a device for measuring the deformation of an off - shore wind turbine tower, specifically: A lateral displacement monitoring module, a laser monitoring module, a monitoring unit and a wind turbine tower. The wind turbine tower includes a nacelle, a tower barrel and a working platform which are hermetically connected. The lateral displacement monitoring module is fixedly installed on the outer top of the nacelle. The laser monitoring module is adaptively installed inside the tower barrel. Both the lateral displacement monitoring module and the laser monitoring module are signal - connected to the monitoring unit. The monitoring unit aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to calculate the deformation of the off - shore wind turbine tower; The method is as follows: Measure the wind force data through a wind speed sensing unit, transmit the wind force data to the monitoring unit, and then the monitoring unit equivalentizes the transmitted wind force data into the bending moment and shear force applied to the tower barrel. The monitoring unit respectively imports the equivalent bending moment and shear force into the calculation formula carried by MATLAB software for calculation to obtain the real - time lateral displacement at different heights of the tower barrel; Based on a laser emitting unit installed at the top of the inner wall of the tower barrel and a photoelectric receiving unit installed at the bottom inside the tower barrel, when the tower barrel deforms, the laser projection position changes and is received by the area around the center point of the photoelectric receiving unit, so as to calculate the distance from the receiving point to the center point, and this distance is the displacement that occurs at the top of the tower barrel; Compare the numerical values of the two results. If the difference between the numerical values of the two results does not exceed 20% of the smaller value of the two results, the final result takes the average of the two results as the real - time lateral displacement of the tower barrel; If the difference between the numerical values of the two results is greater than 20% of the smaller value of the two results, it is considered that the error of the laser monitoring method is too large, and the final result selects the result based on the analytical calculation of the lateral displacement as the real - time lateral displacement of the tower barrel.

2. The method for measuring the deformation of an off - shore wind turbine tower barrel according to claim 1, wherein, Also including: When the monitoring results of both monitoring methods exceed the warning line, the monitoring unit gives an alarm; When the monitoring result of the laser monitoring method exceeds the warning line, but the calculation result of the lateral displacement analytical calculation does not exceed the warning line, then compare whether the difference between the numerical values of the two results does not exceed 20% of the smaller value of the two results. If it does not exceed 20%, it is necessary to compare whether the average of the two results exceeds the lateral deformation limit value; if it is greater than 20%, it is considered that the error of the laser monitoring method is too large, and the final result selects the result based on the analytical calculation of the lateral displacement as the real - time lateral displacement of the tower barrel. When the calculation result of the lateral displacement analytical calculation exceeds the warning line, but the monitoring result of the laser monitoring method does not exceed the warning line, the monitoring unit gives an alarm.

3. A method for measuring the deformation of an off - shore wind turbine tower barrel according to claim 1, characterized in that, The laser monitoring module includes a laser emitting unit and a photoelectric receiving unit. The laser emitting unit is fixedly installed at the top of the inner wall of the tower barrel; the photoelectric receiving unit is fixedly installed on the working platform at the bottom inside the tower barrel, and the laser emitted by the laser emitting unit is projected at the center of the photoelectric receiving unit.

4. A method for measuring the deformation of an offshore wind turbine tower barrel according to claim 1, characterized in that, The lateral displacement monitoring module includes a wind speed sensing unit, and the wind speed sensing unit is signal - connected to the monitoring unit.

5. A method for measuring the deformation of an offshore wind turbine tower according to claim 1, characterized in that, Also including an off - shore wind power monitoring center, and the monitoring unit is placed in the off - shore wind power monitoring center.

6. The method for measuring the deformation of an off - shore wind turbine tower according to claim 3, characterized in that, The laser emitting unit, the photoelectric receiving unit and the wind speed sensing unit are all data - connected to the monitoring unit in the off - shore wind power monitoring center through submarine fiber optic cables.

7. A method for measuring the deformation of an offshore wind turbine tower according to claim 1, characterized in that, The monitoring unit has MATLAB software built in. The MATLAB software is equipped with a calculation formula for lateral displacement analysis, and the material data and dimensions of the tower barrel are imported as pre-input parameters in the process of lateral displacement analysis calculation for subsequent lateral displacement analysis calculation.

8. A method for measuring the deformation of an offshore wind turbine tower according to claim 3, characterized in that, The receiving component of the photoelectric receiving unit is in the shape of a disc, and a circular warning line is provided on the disc. The diameter of the circular warning line is determined according to the tower barrel deformation specification, and the diameter of the disc is n times the diameter of the circular warning line.

9. A method for measuring the deformation of an off - shore wind turbine tower according to claim 1, characterized in that, It also includes an over-limit alarm system. According to the calculated displacement data, the tower barrel displacement response during the construction stage of the offshore wind turbine and the variation law of the tower barrel horizontal displacement under the normal working state of the offshore wind turbine are obtained; an alarm is given according to the signal of the tower barrel deformation exceeding the limit.

Images