Torque testing method, device and equipment of wind driven generator tower drum and medium

Abstract

The invention provides a torque testing method, device and equipment for a wind driven generator tower and a medium, which are applied to an offshore wind driven generator tower, the offshore wind driven generator tower is provided with a torque testing system, the torque testing system comprises a plurality of groups of strain sensors and a data processing system, and the data processing system is connected with the strain sensors. The strain sensor is provided with a torque test circuit, the torque test circuit comprises a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal, the plurality of strain gauges are connected with the first welding terminal and the second welding terminal, and the first welding terminal and the second welding terminal are connected with the third welding terminal; the method comprises the following steps: acquiring strain values of a plurality of strain gauges through a data processing system; and calculating a measured torque according to the strain values, eliminating abnormal torque data, sending target torque data to a remote monitoring platform, and determining a target maximum torque value within a preset time according to the maximum torque values measured by the plurality of groups of strain sensors.

Description

Technical Field

[0001] The invention relates to the field of wind turbine towers, and in particular to a torque testing method, device, equipment and medium for a wind turbine tower. Background Art

[0002] The offshore wind turbine tower serves as a load transfer structure between the wind turbine foundation and the upper tower. In real marine environments, the upper load of the wind turbine is transferred to the tower, and then to the jacket foundation through the tower. Therefore, the actual load size at the connection between the jacket and the tower is crucial to the design. There are a total of six degrees of freedom loads at this position, including horizontal loads in two directions perpendicular to each other, one vertical axial force, horizontal bending moments in two directions perpendicular to each other, and one torque.

[0003] When testing the tower torque, the torque value is usually obtained by arranging strain sensors on the tower surface. The strain gauges of the strain sensors are easily affected by temperature changes, tension and bending moment, which affect the accuracy of the torque test results. In addition, the measurement range of existing strain sensors is small and the measurement accuracy is low. At the same time, when measuring torque, the relevant technology measures a single cross-section and does not monitor the torque load of the structure under various working conditions for a long time. It is impossible to determine the weak section of the structure, thereby strengthening the torsion-resistant design of the weak section. Summary of the invention

[0004] In view of the above problems, a method, device, equipment and medium for testing the torque of a wind turbine tower is proposed to overcome the above problems or at least partially solve the above problems, including:

[0005] In a first aspect, an embodiment of the present invention provides a torque testing method for a wind turbine tower, which is applied to an offshore wind turbine tower. The offshore wind turbine tower is provided with a torque testing system, and the torque testing system includes multiple groups of strain sensors and a data processing system. The multiple groups of strain sensors are arranged at different heights on the surface of the offshore wind turbine tower, and the data processing system is connected to the multiple groups of strain sensors; wherein the multiple groups of strain sensors are provided with a torque testing circuit; the torque testing circuit includes multiple strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the multiple strain gauges are connected to the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal and the third welding terminal are connected; the method includes:

[0006] Acquiring, by the data processing system, voltage change values ​​when the multiple strain gauges of the strain sensor generate strain;

[0007] Obtaining resistance change values ​​of the plurality of strain gauges according to the voltage change values ​​of the plurality of strain gauges;

[0008] Obtaining target measurement strain values ​​of the plurality of strain gauges according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges;

[0009] Calculating the measured torque of the offshore wind turbine tower according to the target measured strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower;

[0010] Identify and eliminate abnormal measured torque data through the data processing system to obtain target torque data;

[0011] Sending the target torque data to a remote monitoring platform;

[0012] Determine the maximum torque value within the first preset time period measured by each group of strain sensors according to the target torque data under various working conditions within the first preset time period acquired by the remote monitoring platform;

[0013] The target maximum torque value of the offshore wind turbine tower within the first preset time period is determined according to the maximum torque value within the first preset time period measured by each group of strain sensors.

[0014] Optionally, the plurality of strain gauges have terminal blocks, and the plurality of strain gauges are connected to the first welding terminal and the second welding terminal through the terminal blocks, and the connection method is:

[0015] The first terminal of the first strain gauge is connected to the first welding point of the first welding terminal;

[0016] The second terminal of the first strain gauge is connected to the second welding point of the first welding terminal;

[0017] The first terminal of the second strain gauge is connected to the third welding point of the first welding terminal;

[0018] The second terminal of the second strain gauge is connected to the fourth welding point of the first welding terminal;

[0019] The first terminal of the third strain gauge is connected to the first welding point of the second welding terminal;

[0020] The second terminal of the third strain gauge is connected to the second welding point of the second welding terminal;

[0021] The first terminal of the fourth strain gauge is connected to the third welding point of the second welding terminal;

[0022] The second terminal of the fourth strain gauge is connected to the fourth welding point of the second welding terminal.

[0023] Optionally, the first welding terminal, the second welding terminal and the third welding terminal are connected in the following manner:

[0024] The first welding point of the first welding terminal and the first welding point of the second welding terminal are connected to the second welding point of the third welding terminal;

[0025] The second welding point of the first welding terminal and the third welding point of the first welding terminal are connected to the first welding point of the third welding terminal;

[0026] The fourth welding point of the first welding terminal and the fourth welding point of the second welding terminal are connected to the fourth welding point of the third welding terminal;

[0027] The second welding point of the second welding terminal and the third welding point of the second welding terminal are connected to the third welding point of the third welding terminal.

[0028] Optionally, the data processing system is connected to the strain sensor and includes:

[0029] The first welding point of the third welding terminal is respectively connected to the excitation voltage positive and the sensing lead positive of the data processing system through two wires;

[0030] The second welding point of the third welding terminal is positively connected to the signal of the data processing system through a wire;

[0031] The third welding point of the third welding terminal is respectively connected to the negative excitation voltage and the negative induction lead of the data processing system through two wires;

[0032] The fourth welding point of the third welding terminal is connected to the signal negative of the data processing system through a wire.

[0033] Optionally, the first strain gauge and the second strain gauge are arranged on one side of the offshore wind turbine tower, and the third strain gauge and the fourth strain gauge are arranged on a side opposite to the first strain gauge and the second strain gauge.

[0034] Optionally, the data processing system sets a sampling frequency, and collects the strain signal of the strain sensor according to the sampling frequency.

[0035] Optionally, the torque calculation formula of the offshore wind turbine tower is:

[0036] T=W·τ,

[0037] τ=G·γ,

[0038]

[0039] γ=2ε,

[0040]

[0041] Wherein, T is the measured torque of the offshore wind turbine tower; W is the torsional section coefficient of the offshore wind turbine tower; τ is the cross-sectional shear stress of the offshore wind turbine tower; G is the shear modulus of the offshore wind turbine tower; γ is the shear strain of the offshore wind turbine tower; υ is the material Poisson's ratio of the offshore wind turbine tower; ε is the torsional strain; E is the elastic modulus of the offshore wind turbine tower; A is the bridge arm coefficient of the circuit; ε 测 is the measured strain value of the multiple strain gauges.

[0042] Optionally, the method further comprises:

[0043] measuring original measured strain values ​​and initial strain values ​​of the plurality of strain gauges;

[0044] The target measured strain value is calculated according to the original measured strain values ​​and the initial strain values ​​of the plurality of strain gauges, and the calculation formula is:

[0045] ε 测 =ε′ 测 -ε0,

[0046] Among them, ε′ 测 is the original measured strain value of the multiple strain gauges; ε0 is the initial strain value of the multiple strain gauges.

[0047] Optionally, the initial strain value of the multiple strain gauges is an average value of the absolute value of the strain measured within a second preset time period when the average wind speed is within a preset wind speed range.

[0048] Optionally, the method further comprises:

[0049] The parameters of the offshore wind turbine tower are obtained through a data processing system.

[0050] Optionally, the data processing system is provided with a torque calculation module, and the torque calculation module is used to calculate the torque of the offshore wind turbine tower.

[0051] Optionally, calculating the torque of the offshore wind turbine tower according to the strain values ​​of the plurality of strain gauges includes:

[0052] The torque calculation module calculates the torque of the offshore wind turbine tower according to the target measured strain value and the parameters of the offshore wind turbine tower.

[0053] In a second aspect of the present invention, a torque test device for a wind turbine tower is provided, which is applied to an offshore wind turbine tower. The offshore wind turbine tower is provided with a torque test system, which includes a strain sensor and a data processing system. The strain sensor is provided on the surface of the offshore wind turbine tower, and the data processing system is connected to the strain sensor; wherein the strain sensor is provided with a torque test circuit; the torque test circuit includes a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the plurality of strain gauges are connected to the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal and the third welding terminal are connected; the device includes:

[0054] A signal acquisition module, used for acquiring, through the data processing system, voltage change values ​​when the multiple strain gauges of the strain sensor generate strain;

[0055] a resistance change value calculation module, used for obtaining the resistance change values ​​of the plurality of strain gauges according to the voltage change values ​​of the plurality of strain gauges;

[0056] A strain value calculation module, used for obtaining target measurement strain values ​​of the plurality of strain gauges according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges;

[0057] A measurement torque calculation module, used for calculating the measurement torque of the offshore wind turbine tower according to the target measurement strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower;

[0058] A target torque acquisition module, used for identifying and eliminating abnormal torque data through the data processing system to obtain target torque data;

[0059] A target torque data sending module, used for sending the target torque data to a remote monitoring platform;

[0060] a maximum torque value determination module, configured to determine the maximum torque value within the first preset time period measured by each group of strain sensors according to the target torque data under various working conditions within the first preset time period acquired by the remote monitoring platform;

[0061] The target maximum torque value determination module is used to determine the target maximum torque value of the offshore wind turbine tower within the first preset time period according to the maximum torque value within the first preset time period measured by each group of strain sensors.

[0062] In the third aspect of the implementation of the present invention, there is also provided an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a torque testing method for a wind turbine tower as described above is implemented.

[0063] In a fourth aspect of the present invention, there is further provided a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-described torque testing methods for a wind turbine tower.

[0064] The embodiments of the present invention have the following advantages:

[0065] In the embodiment of the present invention, the torque test circuit can eliminate the influence of tensile and compressive deformation and bending deformation, obtain accurate torsional strain of the tower structure, form the mutual temperature compensation effect of strain gauges, avoid the additional influence of ambient temperature changes on the test results of the strain gauge body, and the torque test circuit composed of multiple strain gauges is suitable for large-scale, high-precision stress and strain measurement. The voltage change of the offshore wind turbine tower under load is transmitted to the data processing system through the torque test circuit, and the abnormal measured torque data is identified and eliminated by the data processing system, which reduces the interference of abnormal data, and finally obtains the real torque value of the offshore wind turbine tower that eliminates the influence of tensile and compressive deformation, bending deformation and temperature change. At the same time, the target torque data is sent to the remote monitoring platform, and the torsion condition of the structure can be remotely monitored. Multiple sets of strain sensors are set to monitor the torsion strain data of multiple sections at the same time, determine the maximum torque value under various working conditions within a certain period of time, and then determine the location of the section with the largest torque value, thereby strengthening the torsion-resistant design of the weak section with the largest torque and improving the force-bearing performance of the structure.

[0066] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0068] Figure 1 is a flowchart of steps of a torque testing method for a wind turbine tower provided by some embodiments of the present invention;

[0069] Figure 2 It is a schematic diagram of the layout of wind turbine tower torque load measurement sensors provided by some embodiments of the present invention;

[0070] Figure 3 is a schematic diagram of strain gauge circuit connection provided by some embodiments of the present invention;

[0071] Figure 4 It is a structural block diagram of a torque testing device for a wind turbine tower provided in some embodiments of the present invention.

[0072] Reference numerals:

[0073] 2-wind turbine tower, 201-first strain gauge, 202-second strain gauge, 203-third strain gauge, 204-fourth strain gauge, 301-first welding terminal, 302-second welding terminal, 303-third welding terminal. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are proposed in order to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other without contradiction.

[0075] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] The tower of an offshore wind turbine can transfer the load between the foundation of the wind turbine and the upper tower. The load generated by the wind turbine during operation will be transferred to the tower, and then transferred to the foundation of the conductor frame through the tower. Therefore, the actual load size at the connection between the conductor frame and the tower is crucial to the design.

[0077] Reference Figure 1 , shows a flow chart of the steps of a torque testing method for a wind turbine tower provided by some embodiments of the present invention, which may specifically include the following steps:

[0078] Step 101: obtaining, by the data processing system, voltage change values ​​when the plurality of strain gauges of the strain sensor generate strain.

[0079] In order to measure the torque of the tower, some embodiments of the present invention are provided with a torque testing system for measuring the torque of the offshore wind turbine tower. The torque testing system includes multiple sets of strain sensors and a data processing system. The multiple sets of strain sensors are arranged at different heights on the surface of the offshore wind turbine tower. The data processing system is connected to the multiple sets of strain sensors; wherein the multiple sets of strain sensors are provided with a torque testing circuit; the torque testing circuit includes multiple strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the multiple strain gauges are connected to the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal and the third welding terminal are connected.

[0080] Specifically, when measuring the torque of an offshore wind turbine tower, it is necessary to select the measurement section of the offshore wind turbine tower structure. The tower section is circular, and strain sensors are symmetrically arranged on both sides of the tower.

[0081] The strain sensor is provided with a torque test circuit, which consists of a strain gauge and a welding terminal. The strain gauge is usually made of a very thin metal foil or conductive material and is pasted on the surface of the object to be measured. The welding terminal is an electrical connection component used to fix wires or other conductive components together by welding to achieve electrical connection. When pasting the strain gauge, first grind the inner wall of the tower until the silver steel body is exposed. The grinding range is larger than the area of ​​the strain gauge. Then use a polishing machine to polish the steel surface to facilitate the strain gauge to fit tightly. According to the pasting plan, use a steel needle to mark the center point of the strain gauge at this position. According to the top position marks around the surface of the strain gauge, mark the positioning auxiliary lines of other positions, clean it with alcohol, and then glue the strain gauge to the inner wall of the tower in turn, and paste the welding terminal to complete the pasting work.

[0082] Further, refer to Figure 2 , showing a schematic diagram of the layout of wind turbine tower torque load measurement sensors provided by some embodiments of the present invention, Figure 2 Only one set of sensors is shown. In actual application, in order to obtain the weak section of the wind turbine tower, multiple sets of sensors can be arranged from bottom to bottom along the surface of the wind turbine tower, and each set of sensors corresponds to a measurement section. The strain gauge may include a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge. The first strain gauge and the second strain gauge are arranged on one side of the offshore wind turbine tower, and the third strain gauge and the fourth strain gauge are arranged on the side opposite to the first strain gauge and the second strain gauge.

[0083] The first strain gauge and the second strain gauge are grouped together, and the third strain gauge and the fourth strain gauge are grouped together. The strain gauges on each side are arranged in a V shape, and the axis of each group of strain gauges forms an angle of 45 degrees with the vertical direction of the wind turbine tower. The two groups of strain gauges are symmetrically arranged on both sides of the wind turbine tower, that is, the positions of the first strain gauge and the third strain gauge are symmetrical, and the positions of the second strain gauge and the third strain gauge are symmetrical.

[0084] It should be noted that since the maximum torsional shear stress of the circular cross-section of the offshore wind turbine tower occurs at various points around the cross-section, the location of the strain gauge has nothing to do with the wind direction, and the strain sensor can be installed in any direction.

[0085] After the strain gauge is connected to the welding terminal to form a torque test circuit, the welding terminal needs to be connected to the data processing system. When measuring the tower torque, the distance between the strain gauge and the acquisition system is usually large, that is, the wire connecting the strain gauge and the welding terminal will be longer, and the strain gauge itself is small, and the resistance value is smaller than the resistance of the wire connecting the strain gauge and the welding terminal. Therefore, the longer wire will affect the resistance change result of the measured strain gauge.

[0086] In some embodiments of the present invention, there may be multiple strain gauges, and the strain gauges may be divided into two groups. The two groups of strain gauges are first connected to the first welding terminal and the second welding terminal which are closer to the strain gauges, respectively, and then the first welding terminal and the second welding terminal are connected to the third welding terminal respectively. Since the strain gauge is closer to the first welding terminal and the second welding terminal, the connecting wire is also shorter, which can reduce the influence of the wire resistance on the measurement result.

[0087] Further, refer to Figure 3 , shows a schematic diagram of strain gauge circuit connection provided by some embodiments of the present invention, wherein the multiple strain gauges include a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge; the multiple strain gauges have terminal heads, and the multiple strain gauges are connected to the first welding terminal and the second welding terminal through the terminal heads, and the connection method is: the first terminal head of the first strain gauge is connected to the first welding point of the first welding terminal; the second terminal head of the first strain gauge is connected to the second welding point of the first welding terminal; the first terminal head of the second strain gauge is connected to the third welding point of the first welding terminal; the second terminal head of the second strain gauge is connected to the fourth welding point of the first welding terminal; the first terminal head of the third strain gauge is connected to the first welding point of the second welding terminal; the second terminal head of the third strain gauge is connected to the second welding point of the second welding terminal; the first terminal head of the fourth strain gauge is connected to the third welding point of the second welding terminal; the second terminal head of the fourth strain gauge is connected to the fourth welding point of the second welding terminal.

[0088] In order to reduce the resistance influence of the long wire between the strain gauge and the welding terminal, the two sets of strain gauges can be connected to the first welding terminal and the second welding terminal which are closer to the strain gauge. Each strain gauge has two terminals, and each terminal of the first strain gauge and the second strain gauge can be connected to the welding point of the first welding terminal one by one. Similarly, each terminal of the third strain gauge and the fourth strain gauge can be connected to the welding point of the second welding terminal one by one.

[0089] Further, refer to Figure 3 , shows a schematic diagram of strain gauge circuit connection provided by some embodiments of the present invention, wherein the first welding terminal, the second welding terminal and the third welding terminal are connected, and the connection method is: the first welding point of the first welding terminal and the first welding point of the second welding terminal are connected to the second welding point of the third welding terminal; the second welding point of the first welding terminal and the third welding point of the first welding terminal are connected to the first welding point of the third welding terminal; the fourth welding point of the first welding terminal and the fourth welding point of the second welding terminal are connected to the fourth welding point of the third welding terminal; the second welding point of the second welding terminal and the third welding point of the second welding terminal are connected to the third welding point of the third welding terminal.

[0090] By connecting the first welding point of the first welding terminal and the first welding point of the second welding terminal to the second welding point of the third welding terminal; connecting the second welding point of the first welding terminal and the third welding point of the first welding terminal to the first welding point of the third welding terminal; connecting the fourth welding point of the first welding terminal and the fourth welding point of the second welding terminal to the fourth welding point of the third welding terminal; and connecting the second welding point of the second welding terminal and the third welding point of the second welding terminal to the third welding point of the third welding terminal, a torque test circuit is formed to eliminate the influence of temperature changes, tensile and compressive deformations and bending deformations.

[0091] Specifically, the force direction of the test position is first determined, and the strain gauge can be defined as the positive direction when it is subjected to tensile strain and the negative direction when it is subjected to compressive strain. Assuming that the torque direction of the tower is clockwise, the first strain gauge is judged to be tensile, and the strain value is positive, the second strain gauge is compressive, and the strain value is negative, the third strain gauge is compressive, and the strain value is negative, and the fourth strain gauge is tensile, and the strain value is positive.

[0092] When the wind turbine tower is subjected to the combined force and temperature, the strains of the four strain gauges are:

[0093] ε1=ε 扭 -ε 弯 +ε 拉 +ε t (1)

[0094] ε2=-ε扭 -ε 弯 +ε 拉 +ε t (2)

[0095] ε3=-ε 扭 +ε 弯 +ε 拉 +ε t (3)

[0096] ε4=ε 扭 +ε 弯 +ε 拉 +ε t (4)

[0097] Among them, ε1, ε2, ε3, and ε4 are the strains of the first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge, respectively. 扭 , ε 弯 , ε 拉 , ε t They are the strains caused by torsion, bending, tension and temperature respectively.

[0098] According to the torque test circuit connection in the embodiment of the present invention, the output voltage U0 can be expressed as:

[0099] U0=1 / [4*UK(ε1-ε2-ε3+ε4)]=1 / (4*UK*ε 扭 ) (5)

[0100] Among them, U is the power supply voltage and K is the bridge sensitivity coefficient.

[0101] It can be seen from formula (5) that the output voltage is only related to the strain caused by torsion, and bending, stretching and temperature are all offset. Therefore, the test circuit in the embodiment of the present invention can eliminate the influence of temperature change, tensile and compressive deformation and bending deformation, and measure the real strain value.

[0102] After the arrangement of the strain sensor is completed, the strain sensor needs to be connected to the data processing system. In the embodiment of the present invention, the first welding point of the third welding terminal is connected to the positive excitation voltage and the positive induction lead of the data processing system through two wires; the second welding point of the third welding terminal is connected to the positive signal of the data processing system through a wire; the third welding point of the third welding terminal is connected to the negative excitation voltage and the negative induction lead of the data processing system through two wires; the fourth welding point of the third welding terminal is connected to the negative signal of the data processing system through a wire. The change of the wire resistance can be compensated to ensure that the excitation voltage of the bridge is not affected by the wire resistance, thereby improving the accuracy of the measurement, reducing the signal drift caused by the change of the wire resistance, thereby improving the stability and repeatability of the signal, and providing higher measurement accuracy.

[0103] The strain sensor can transmit the signal when the offshore wind turbine tower is deformed by force to the data processing system, and the data processing system can collect the voltage change value when the strain gauge sends the strain. When the offshore wind turbine tower is subjected to load, the strain gauge will be strained, and the strain of the strain gauge will cause the voltage of the strain sensor to change. The acquisition system can collect the voltage change value of the strain sensor.

[0104] Furthermore, in some embodiments of the present invention, step 101 further includes the following sub-steps:

[0105] Sub-step 11: The data processing system sets a sampling frequency, and collects the strain signal of the strain sensor according to the sampling frequency.

[0106] Since the strain sensor needs to monitor the strain signal for a long time to dynamically obtain strain data, the strain acquisition sets the sampling frequency. The strain signal of the strain sensor can be regularly collected according to the sampling frequency to obtain multiple groups of data and monitor the strain data in real time.

[0107] Step 102: Obtain resistance change values ​​of the plurality of strain gauges according to the voltage change values ​​of the plurality of strain gauges.

[0108] When a strain gauge is subjected to an external load, its structure undergoes a slight deformation, i.e., strain. This deformation causes the size and shape of the resistance wire or conductive material inside the strain gauge to change, which in turn causes a change in resistance. The data processing system can indirectly monitor the resistance change of the strain gauge by detecting the voltage change at the output of the bridge. When the resistance of the strain gauge changes, the equilibrium state of the bridge is broken, resulting in a voltage difference on the diagonal of the bridge. This voltage difference is proportional to the resistance change of the strain gauge. By measuring this voltage difference and combining it with the circuit parameters of the bridge, the resistance change value of the strain gauge can be calculated.

[0109] It should be noted that, in the embodiment of the present invention, the output voltage is four times the output voltage of the single-arm bridge, which can adapt to large-scale, high-precision stress and strain measurement.

[0110] Step 103 : obtaining target measurement strain values ​​of the plurality of strain gauges according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges.

[0111] The resistance change value of each strain gauge is obtained through the data processing system. Each strain gauge has a specific sensitivity coefficient, which describes the relationship between the resistance change of the strain gauge and the strain. The sensitivity coefficient is a constant. According to the resistance change value of the strain gauge and its corresponding sensitivity coefficient, the target measurement strain value of the strain gauge can be calculated. The calculation formula is usually as follows:

[0112] Strain value = resistance change value / (sensitivity coefficient * initial resistance value) (6)

[0113] The resistance change value is the actual change in the resistance of the strain gauge, and the initial resistance value is the resistance value of the strain gauge when it is not strained.

[0114] Step 104 : calculating the measured torque of the offshore wind turbine tower according to the target measured strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower.

[0115] The target measured strain value of the strain gauge can be measured and combined with the parameters of the offshore wind turbine tower to perform torque calculation to obtain the measured torque value of the offshore wind turbine tower.

[0116] In some embodiments of the present invention, step 104 further includes:

[0117] Sub-step 22: The torque calculation formula of the offshore wind turbine tower is:

[0118] T=W·τ (7)

[0119] τ=G·γ(8)

[0120]

[0121] γ=2ε(10)

[0122]

[0123] Wherein, T is the measured torque of the offshore wind turbine tower; W is the torsional section coefficient of the offshore wind turbine tower; τ is the cross-sectional shear stress of the offshore wind turbine tower; G is the shear modulus of the offshore wind turbine tower; γ is the shear strain of the offshore wind turbine tower; υ is the material Poisson's ratio of the offshore wind turbine tower; ε is the torsional strain; E is the elastic modulus of the offshore wind turbine tower; A is the bridge arm coefficient of the circuit; ε 测 is the measured strain value of the multiple strain gauges.

[0124] In some embodiments of the present invention, sub-step 22 further includes the following sub-steps:

[0125] Sub-step 221: measuring original measured strain values ​​and initial strain values ​​of the plurality of strain gauges;

[0126] The target measured strain value is calculated according to the original measured strain values ​​and the initial strain values ​​of the plurality of strain gauges, and the calculation formula is:

[0127] ε 测 =ε′ 测 -ε0(12)

[0128] Among them, ε′ 测 is the original measured strain value of the multiple strain gauges; ε0 is the initial strain value of the multiple strain gauges.

[0129] The original measured strain value is the strain value obtained by direct measurement. The original measured strain value contains the initial strain value. The initial strain value refers to the inherent strain caused by prestress, temperature change, manufacturing process or other factors in the structure when there is no external load. In strain measurement, the initial strain value is an important reference point that can help distinguish between strain caused by external loads and strain caused by other factors. In order to obtain the true strain value, the influence of the initial strain needs to be considered.

[0130] In the embodiment of the present invention, the initial strain value of the plurality of strain gauges is an average value of the absolute values ​​of the strains measured within a preset time period when the average wind speed is within a preset wind speed range.

[0131] You can select a period of time when the wind speed is low to measure the strain. For example, when the wind speed is less than 3m / s, measure the strain value within 1 minute and calculate the average value of the strain. Since torsional strain has two directions, the average value of the absolute value of the strain can be taken for calculation.

[0132] In some embodiments of the present invention, step 104 further includes:

[0133] Sub-step 23: Acquire the parameters of the offshore wind turbine tower through a data processing system.

[0134] When calculating the torque of the offshore wind turbine tower, it is necessary to combine the parameters of the offshore wind turbine tower. Therefore, the data processing system can obtain the parameters of the offshore wind turbine tower.

[0135] Furthermore, the data processing system is provided with a torque calculation module, and the torque calculation module is used to calculate the torque of the offshore wind turbine tower.

[0136] A torque calculation module can be configured in the data processing system, and the torque calculation module can obtain the target measured strain value and the parameters of the offshore wind turbine tower, and pre-set relevant calculation formulas.

[0137] Furthermore, the torque calculation module calculates the torque of the offshore wind turbine tower according to the measured strain value and the parameters of the offshore wind turbine tower.

[0138] The target measured strain value and the parameters of the offshore wind turbine tower obtained by the data processing system are substituted into a preset calculation formula to automatically calculate the torque value. The torque value can be calculated in real time during the torque monitoring of the offshore wind turbine tower.

[0139] It should be noted that the torque calculation module can calculate the result of each sampling according to the set sampling frequency, or can sample the sampling results at intervals. The calculation results can be stored and a statistical table can be generated. A torque value threshold can also be preset. When the calculated torque value is greater than the preset torque threshold, an alarm message is generated. The alarm message can be sent to the communication terminal to prompt the business personnel that the torque of the offshore wind turbine tower is too large so that the business personnel can take countermeasures.

[0140] In an embodiment of the present invention, an offshore wind turbine tower is provided with a torque testing system, the torque testing system includes a strain sensor and a data processing system, the strain sensor is arranged on the surface of the offshore wind turbine tower, the data processing system is connected to the strain sensor, wherein the strain sensor is provided with a torque testing circuit, the torque testing circuit includes a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal, the plurality of strain gauges are connected to the first welding terminal and the second welding terminal, the first welding terminal and the second welding terminal are connected to the third welding terminal, the voltage change values ​​of the plurality of strain gauges of the strain sensor when strain is generated are obtained through the data processing system, the resistance change values ​​of the plurality of strain gauges are obtained according to the voltage change values ​​of the plurality of strain gauges, the strain values ​​of the plurality of strain gauges are obtained according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges, and the torque of the offshore wind turbine tower is calculated according to the strain values ​​of the plurality of strain gauges. The output voltage can be increased four times through the torque test circuit, and the influence of tensile and compressive deformation and bending deformation can be eliminated to obtain accurate torsional strain of the tower structure, form a mutual temperature compensation effect of strain gauges, and avoid the additional influence of ambient temperature changes on the test results of the strain gauge body. At the same time, the torque test circuit composed of multiple strain gauges is suitable for large-scale, high-precision stress and strain measurement. The voltage change of the offshore wind turbine tower under load is transmitted to the data processing system through the torque test circuit, and finally the real torque value of the offshore wind turbine tower is obtained, which eliminates the influence of tensile and compressive deformation, bending deformation and temperature change.

[0141] Step 105 , identifying and eliminating abnormal measured torque data through the data processing system to obtain target torque data.

[0142] Under normal circumstances, the measured torque data can form a smooth curve when it is counted. Due to equipment instability, human factors, etc., some sudden changes may occur, which will interfere with the torque measurement results. Therefore, these abnormal measured torque data need to be excluded. The data processing system can identify abnormal measured torque data and exclude it to obtain the target torque data.

[0143] Step 106: Send the target torque data to a remote monitoring platform.

[0144] In order to facilitate the monitoring of torque data, the target torque data can be sent to the remote monitoring platform through the data processing system, or to the mobile terminal, so that the staff can monitor the torque condition of the wind turbine tower in real time. The remote monitoring platform is a technical system that allows users to monitor and manage remote equipment, systems or processes in real time through the network.

[0145] In some embodiments of the present application, the remote monitoring platform can collect and display data from remote devices in real time, provide data analysis tools, help users understand the operating status and performance of the equipment, and when abnormalities or preset conditions are detected, the system can send alarms and notifications, store historical data, facilitate subsequent analysis and auditing, provide a friendly user interface, and facilitate operation and management. The remote monitoring platform can improve efficiency, reduce costs, and enhance the control capabilities of remote devices and processes. It should be noted that a torque limit value can be preset. When the monitored torque value is greater than the preset torque limit value, the remote monitoring platform can issue a warning to prompt the staff to take countermeasures.

[0146] Step 107 , determining the maximum torque value within the first preset time period measured by each group of strain sensors according to the target torque data under various working conditions within the first preset time period acquired by the remote monitoring platform.

[0147] Multiple sets of strain sensors are set from top to bottom on the surface of the offshore wind turbine tower. These strain sensors can work for a long time. When measuring torque, a certain time period can be preset, which can include various extreme working conditions, such as typhoons, waves, wind turbine operation, etc. Within the preset time period, the maximum target torque value measured by each set of sensors is determined as the maximum torque value. The maximum torque value reflects the maximum torque value of each section under extreme working conditions, that is, the most unfavorable condition of each section of the wind turbine being torsioned.

[0148] Step 108 , determining a target maximum torque value of the offshore wind turbine tower within the first preset time period according to the maximum torque value within the first preset time period measured by each group of strain sensors.

[0149] Within the preset time, the maximum torque value measured by each set of strain sensors is obtained, and the maximum item among all the maximum torque values ​​can be determined as the target maximum torque value. The section where the strain sensor corresponding to the target maximum torque value is located can be used as the weak section of the wind turbine tower, where the torsion is the largest and can be strengthened.

[0150] In the embodiment of the present invention, the torque test circuit can eliminate the influence of tensile and compressive deformation and bending deformation, obtain accurate torsional strain of the tower structure, form the mutual temperature compensation effect of strain gauges, avoid the additional influence of ambient temperature changes on the test results of the strain gauge body, and the torque test circuit composed of multiple strain gauges is suitable for large-scale, high-precision stress and strain measurement. The voltage change of the offshore wind turbine tower under load is transmitted to the data processing system through the torque test circuit, and the abnormal measured torque data is identified and eliminated by the data processing system, which reduces the interference of abnormal data, and finally obtains the real torque value of the offshore wind turbine tower that eliminates the influence of tensile and compressive deformation, bending deformation and temperature change. At the same time, the target torque data is sent to the remote monitoring platform, and the torsion condition of the structure can be remotely monitored. Multiple sets of strain sensors are set to monitor the torsion strain data of multiple sections at the same time, determine the maximum torque value under various working conditions within a certain period of time, and then determine the location of the section with the largest torque value, thereby strengthening the torsion-resistant design of the weak section with the largest torque and improving the force-bearing performance of the structure.

[0151] Reference Figure 4 , showing a schematic structural diagram of a torque testing device for a wind turbine tower provided by some embodiments of the present invention, the torque testing method is applied to an offshore wind turbine tower, the offshore wind turbine tower is provided with a torque testing system, the torque testing system includes a strain sensor and a data processing system, the strain sensor is provided on the inner surface of the offshore wind turbine tower, the data processing system is connected to the strain sensor; wherein the strain sensor is provided with a torque testing circuit; the torque testing circuit includes a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the plurality of strain gauges are connected to the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal are connected to the third welding terminal; specifically, the following modules may be included:

[0152] A signal acquisition module 401 is used to obtain, through the data processing system, voltage change values ​​when the multiple strain gauges of the strain sensor generate strain;

[0153] A resistance change value calculation module 402, configured to obtain resistance change values ​​of the plurality of strain gauges according to voltage change values ​​of the plurality of strain gauges;

[0154] A strain value calculation module 403, configured to obtain target measurement strain values ​​of the plurality of strain gauges according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges;

[0155] A measured torque calculation module 404, configured to calculate the torque of the offshore wind turbine tower according to the target measured strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower;

[0156] A target torque acquisition module 405 is used to identify and eliminate abnormal torque data through the data processing system to obtain target torque data;

[0157] A target torque data sending module 406 is used to send the target torque data to a remote monitoring platform;

[0158] A maximum torque value determination module 407, a maximum torque value determination module, configured to determine a maximum torque value within a first preset time period measured by each group of strain sensors according to target torque data under various working conditions within a first preset time period acquired by the remote monitoring platform;

[0159] The target maximum torque value determination module 408 is a target maximum torque value determination module, which is used to determine the target maximum torque value of the offshore wind turbine tower within the first preset time period based on the maximum torque value within the first preset time measured by each group of strain sensors.

[0160] In an optional embodiment of the present invention, the signal acquisition module 401 includes:

[0161] A sampling frequency setting submodule, used to set the sampling frequency and collect the strain signal of the strain sensor according to the sampling frequency;

[0162] The tower parameter acquisition submodule is used to acquire the parameters of the offshore wind turbine tower through a data processing system.

[0163] In an optional embodiment of the present invention, the measured torque calculation module 404 includes:

[0164] The target measured strain value calculation submodule is used to measure the original measured strain values ​​and initial strain values ​​of the multiple strain gauges; and calculate the target measured strain value according to the original measured strain values ​​and initial strain values ​​of the multiple strain gauges. The calculation formula is: ε 测 =ε′ 测 -ε0, where ε′ 测 is the original measured strain value of the multiple strain gauges; ε0 is the initial strain value of the multiple strain gauges.

[0165] In the embodiment of the present invention, the torque test circuit can eliminate the influence of tensile and compressive deformation and bending deformation, obtain accurate torsional strain of the tower structure, form the mutual temperature compensation effect of strain gauges, avoid the additional influence of ambient temperature changes on the test results of the strain gauge body, and the torque test circuit composed of multiple strain gauges is suitable for large-scale, high-precision stress and strain measurement. The voltage change of the offshore wind turbine tower under load is transmitted to the data processing system through the torque test circuit, and the abnormal measured torque data is identified and eliminated by the data processing system, which reduces the interference of abnormal data, and finally obtains the real torque value of the offshore wind turbine tower that eliminates the influence of tensile and compressive deformation, bending deformation and temperature change. At the same time, the target torque data is sent to the remote monitoring platform, and the torsion condition of the structure can be remotely monitored. Multiple sets of strain sensors are set to monitor the torsion strain data of multiple sections at the same time, determine the maximum torque value under various working conditions within a certain period of time, and then determine the location of the section with the largest torque value, thereby strengthening the torsion-resistant design of the weak section with the largest torque and improving the force-bearing performance of the structure.

[0166] Some embodiments of the present invention further provide an electronic device, which may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the torque testing method for the wind turbine tower as described above is implemented.

[0167] Some embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the torque testing method for a wind turbine tower is implemented as described above.

[0168] Some embodiments of the present invention further provide a computer program product, including a computer program, which implements the above torque testing method for a wind turbine tower when executed by a processor.

[0169] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0170] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0171] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0172] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0173] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0174] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0175] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0176] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0177] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the above elements.

[0178] The torque testing method, device, equipment and medium of the wind turbine tower provided are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for testing the torque of a wind turbine tower, characterized in that: Applied to an offshore wind turbine tower, the offshore wind turbine tower is provided with a torque testing system, the torque testing system comprises a plurality of strain sensors and a data processing system, the plurality of strain sensors are arranged at different heights on the surface of the offshore wind turbine tower, and the data processing system is connected with the plurality of strain sensors; wherein the plurality of strain sensors are provided with a torque testing circuit; the torque testing circuit comprises a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the plurality of strain gauges are connected with the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal and the third welding terminal are connected; the method comprises: Acquiring, by the data processing system, voltage change values ​​when the multiple strain gauges of the strain sensor generate strain; Obtaining resistance change values ​​of the plurality of strain gauges according to the voltage change values ​​of the plurality of strain gauges; Obtaining target measurement strain values ​​of the plurality of strain gauges according to the resistance change values ​​of the plurality of strain gauges and the sensitivity coefficients of the plurality of strain gauges; Calculating the measured torque of the offshore wind turbine tower according to the target measured strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower; Identify and eliminate abnormal measured torque data through the data processing system to obtain target torque data; Sending the target torque data to a remote monitoring platform; Determine the maximum torque value within the first preset time period measured by each group of strain sensors according to the target torque data under various working conditions within the first preset time period acquired by the remote monitoring platform; The target maximum torque value of the offshore wind turbine tower within the first preset time period is determined according to the maximum torque value within the first preset time period measured by each group of strain sensors.

2. The torque testing method according to claim 1, characterized in that: The plurality of strain gauges include a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge; the plurality of strain gauges have a terminal, and the plurality of strain gauges are connected to the first welding terminal and the second welding terminal through the terminal, and the connection method is: The first terminal of the first strain gauge is connected to the first welding point of the first welding terminal; The second terminal of the first strain gauge is connected to the second welding point of the first welding terminal; The first terminal of the second strain gauge is connected to the third welding point of the first welding terminal; The second terminal of the second strain gauge is connected to the fourth welding point of the first welding terminal; The first terminal of the third strain gauge is connected to the first welding point of the second welding terminal; The second terminal of the third strain gauge is connected to the second welding point of the second welding terminal; The first terminal of the fourth strain gauge is connected to the third welding point of the second welding terminal; The second terminal of the fourth strain gauge is connected to the fourth welding point of the second welding terminal.

3. The torque testing method according to claim 1, characterized in that: The first welding terminal, the second welding terminal and the third welding terminal are connected in the following manner: The first welding point of the first welding terminal and the first welding point of the second welding terminal are connected to the second welding point of the third welding terminal; The second welding point of the first welding terminal and the third welding point of the first welding terminal are connected to the first welding point of the third welding terminal; The fourth welding point of the first welding terminal and the fourth welding point of the second welding terminal are connected to the fourth welding point of the third welding terminal; The second welding point of the second welding terminal and the third welding point of the second welding terminal are connected to the third welding point of the third welding terminal.

4. The torque testing method according to claim 3, characterized in that: The data processing system is connected to the strain sensor and includes: The first welding point of the third welding terminal is respectively connected to the excitation voltage positive and the sensing lead positive of the data processing system through two wires; The second welding point of the third welding terminal is positively connected to the signal of the data processing system through a wire; The third welding point of the third welding terminal is respectively connected to the negative excitation voltage and the negative induction lead of the data processing system through two wires; The fourth welding point of the third welding terminal is connected to the signal negative of the data processing system through a wire.

5. The torque testing method according to claim 1, characterized in that: The multiple strain gauges include a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge; the first strain gauge and the second strain gauge are arranged on one side of the offshore wind turbine tower, and the third strain gauge and the fourth strain gauge are arranged on a side opposite to the first strain gauge and the second strain gauge.

6. The torque testing method according to claim 1, characterized in that: The data processing system sets a sampling frequency and collects the strain signal of the strain sensor according to the sampling frequency.

7. The torque testing method according to claim 1, characterized in that: The torque calculation formula of the offshore wind turbine tower is: T=W·τ, τ=G·γ, γ=2ε, Wherein, T is the measured torque of the offshore wind turbine tower; W is the torsional section coefficient of the offshore wind turbine tower; τ is the cross-sectional shear stress of the offshore wind turbine tower; G is the shear modulus of the offshore wind turbine tower; γ is the shear strain of the offshore wind turbine tower; υ is the material Poisson's ratio of the offshore wind turbine tower; ε is the torsional strain; E is the elastic modulus of the offshore wind turbine tower; A is the bridge arm coefficient of the circuit; ε 测 Targeted strain values ​​are measured for the plurality of strain gauges.

8. The torque testing method according to claim 7, characterized in that: The method further comprises: measuring original measured strain values ​​and initial strain values ​​of the plurality of strain gauges; The target measured strain value is calculated according to the original measured strain values ​​and the initial strain values ​​of the plurality of strain gauges, and the calculation formula is: e 测 =e′ 测 -e0, Among them, ε′ 测 is the original measured strain value of the multiple strain gauges; ε0 is the initial strain value of the multiple strain gauges.

9. The torque testing method according to claim 8, characterized in that: The initial strain value of the plurality of strain gauges is an average value of the absolute strain values ​​measured within a second preset time period when the average wind speed is within a preset wind speed range.

10. The torque testing method according to claim 1, characterized in that: The method further comprises: The parameters of the offshore wind turbine tower are obtained through a data processing system.

11. The torque testing method according to claim 10, characterized in that: The data processing system is provided with a torque calculation module, and the torque calculation module is used to calculate the torque of the offshore wind turbine tower.

12. The torque testing method according to claim 11, characterized in that: The step of calculating the torque of the offshore wind turbine tower according to the target measured strain values ​​of the plurality of strain gauges and the parameters of the offshore wind turbine tower comprises: The torque calculation module calculates the torque of the offshore wind turbine tower according to the measured strain value and the parameters of the offshore wind turbine tower.

13. A torque testing device for a wind turbine tower, characterized in that: Applied to an offshore wind turbine tower, the offshore wind turbine tower is provided with a torque testing system, the torque testing system comprises a plurality of strain sensors and a data processing system, the plurality of strain sensors are arranged at different heights on the surface of the offshore wind turbine tower, and the data processing system is connected with the plurality of strain sensors; wherein the plurality of strain sensors are provided with a torque testing circuit; the torque testing circuit comprises a plurality of strain gauges, a first welding terminal, a second welding terminal and a third welding terminal; the plurality of strain gauges are connected with the first welding terminal and the second welding terminal; the first welding terminal, the second welding terminal and the third welding terminal are connected; the device comprises: A signal acquisition module, used for acquiring, through the data processing system, voltage change values ​​when the multiple strain gauges of the strain sensor generate strain; a resistance change value calculation module, used for obtaining the resistance change values ​​of the plurality of strain gauges according to the voltage change values ​​of the plurality of strain gauges; A strain value calculation module, used to obtain the strain values ​​of the multiple strain gauges according to the resistance change values ​​of the multiple strain gauges and the sensitivity coefficients of the multiple strain gauges; A measurement torque calculation module, used for calculating the measurement torque of the offshore wind turbine tower according to the strain values ​​of the plurality of strain gauges; A target torque acquisition module, used for identifying and eliminating abnormal torque data through the data processing system to obtain target torque data; A target torque data sending module, used for sending the target torque data to a remote monitoring platform; a maximum torque value determination module, configured to determine the maximum torque value within the first preset time period measured by each group of strain sensors according to the target torque data under various working conditions within the first preset time period acquired by the remote monitoring platform; The target maximum torque value determination module is used to determine the target maximum torque value of the offshore wind turbine tower within the first preset time period according to the maximum torque value within the first preset time period measured by each group of strain sensors.

14. An electronic device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the torque testing method for a wind turbine tower according to any one of claims 1 to 12 is implemented.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the torque testing method for a wind turbine tower according to any one of claims 1 to 12 is implemented.

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