Distributed testing system and method for axial force of offshore wind power structural component

Abstract

The embodiment of the invention provides a distributed testing system and method for the axial force of an offshore wind power structural member, the structural member is provided with a plurality of measurement sections perpendicular to the axial direction, and the distributed testing system for the axial force of the offshore wind power structural member comprises a plurality of sets of strain sensors symmetrically arranged on the measurement sections; each group of strain sensors comprises two strain gauges, and the mounting directions of the two strain gauges are vertical and adjacent to each other; the welding terminal piece is connected with the multiple groups of strain sensors; and the data acquisition instrument is connected with the welding terminal piece through a six-wire system and is used for acquiring data of the strain sensor of each measurement cross section and testing the axial load of the structural piece according to the data of the strain sensor of each measurement cross section. According to the embodiment of the invention, a symmetrical multi-point distributed axial force measurement mode is adopted, so that the average axial force is formed, the precision is higher, the considered position is more comprehensive, and the situation that the accuracy of the axial force of the whole section is influenced by an inaccurate local test result is avoided; and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy offshore wind power technology, and in particular to a distributed testing system for axial force of offshore wind power structural components, a distributed testing method for axial force of offshore wind power structural components, an electronic device and a storage medium. Background Art

[0002] For example, offshore wind turbine towers and other structural parts serve as load transfer structures between the wind turbine foundation and the upper tower. In real marine environments, the wind turbine upper load 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. The current tower structure diameter is at least 7 meters, and the size of high-flexible towers entering the deep sea will increase in the future. However, the current test accuracy of the axial load calculation test method for offshore wind turbine towers and other structural parts is insufficient. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a distributed testing system for the axial force of an offshore wind power structure, a distributed testing method for the axial force of an offshore wind power structure, an electronic device and a storage medium that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, in a first aspect of the present invention, an embodiment of the present invention discloses a distributed testing system for the axial force of an offshore wind power structure, wherein the structure has a plurality of measuring sections perpendicular to the axial direction, and the distributed testing system for the axial force of the offshore wind power structure comprises:

[0005] A plurality of groups of strain sensors are symmetrically arranged on the measuring cross section; the corresponding strain sensors on the plurality of measuring cross sections are aligned along the same vertical line;

[0006] Each set of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and close to each other; the strain gauges include a first interface and a second interface, the first interface and the second interface are respectively connected to different welding points of the welding terminal;

[0007] Welding terminal pieces to connect with multiple sets of strain sensors;

[0008] A data acquisition instrument is connected to the welding terminal piece through a six-wire system, and is used to collect data from the strain sensor of each measuring section, and to test the axial load of the structural member based on the data from the strain sensor of each measuring section.

[0009] Optionally, the multiple groups of strain sensors are four groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0010] Optionally, the two mutually symmetrical groups of strain sensors are the first target strain sensor group, and the welding terminal piece includes a first welding point, a second welding point, a third welding point and a fourth welding point.

[0011] Optionally, for a first target strain sensor group and one of the welding terminal pieces,

[0012] A first interface of a circumferential strain gauge of one of the strain sensors of the first target strain sensor group is connected to the first welding point;

[0013] The second interface of the circumferential strain gauge of one of the strain sensors of the first target strain sensor group and the first interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0014] The second interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0015] Optionally, a first interface of a vertical strain gauge of one of the strain sensors of the target strain sensor group is connected to the first welding point;

[0016] The second interface of the vertical strain gauge of one strain sensor of the first target strain sensor group and the first interface of the vertical strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0017] The second interface of the vertical strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0018] Optionally, one of the welding terminals is a main welding terminal.

[0019] The first welding point of the total welding terminal is connected to the positive electrode of the excitation voltage of the collector and the positive electrode of the sensing lead respectively;

[0020] The second welding point of the main welding terminal is connected to the positive electrode of the signal of the collector;

[0021] The third welding point of the main welding terminal is respectively connected to the negative electrode of the excitation voltage of the collector and the negative electrode of the sensing lead;

[0022] The fourth welding point of the main welding terminal is connected to the signal cathode of the collector.

[0023] Optionally, the multiple groups of strain sensors are eight groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0024] Optionally, the four groups of strain sensors arranged at intervals are divided into a second target strain sensor group and a third target strain sensor group;

[0025] The welding terminal comprises a first welding point, a second welding point, a third welding point and a fourth welding point.

[0026] Optionally, the four circumferential strain gauges of the second target strain sensor group are connected in series, and the first ends of the four circumferential strain gauges connected in series are connected to the first welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the second welding point;

[0027] The four vertical strain gauges of the second target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the second welding point, and the second ends of the four vertical strain gauges connected in series are connected to the third welding point;

[0028] The four circumferential strain gauges of the third target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the third welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the fourth welding point;

[0029] The four vertical strain gauges of the third target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the first welding point, and the second ends of the four vertical strain gauges connected in series are connected to the fourth welding point.

[0030] Optionally, the plurality of groups of strain sensors are an even number of groups.

[0031] In a second aspect of the present invention, an embodiment of the present invention discloses a distributed testing method for the axial force of an offshore wind power structure, which is applied to a data acquisition instrument, and the data acquisition instrument is applied to the distributed testing system for the axial force of an offshore wind power structure as described above, and the method comprises:

[0032] The data of the strain sensor is collected, and the axial load of the structural component is tested according to the data of the strain sensor.

[0033] Optionally, the step of collecting data from the strain sensor and testing the axial load of the structural member according to the data from the strain sensor includes:

[0034] The axial load is determined using a load calculation formula based on the data of the strain sensor.

[0035] Optionally, the load calculation formula is:

[0036]

[0037] Among them, F Z is the axial load, A is the bridge arm coefficient, which is equal to (1+υ); υ is the Poisson's ratio of the elastic element being measured, E is the elastic modulus of the structural part, and S is the measured cross-sectional area.

[0038] In the third aspect of the present invention, an embodiment of the present invention discloses an electronic device, including a processor and a storage medium, wherein the storage medium stores a computer program executable by the processor, and when the electronic device is running, the processor executes the computer program to implement the distributed testing method for the axial force of offshore wind power structures as described above.

[0039] In a fourth aspect of the present invention, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the distributed testing method for the axial force of an offshore wind power structure as described above is implemented.

[0040] The embodiments of the present invention include the following advantages:

[0041] The embodiment of the present invention is to symmetrically arrange multiple groups of strain sensors on the measuring section; the corresponding strain sensors on the multiple measuring sections are aligned along the same vertical line; each group of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and adjacent; the strain gauge includes a first interface and a second interface, the first interface and the second interface are respectively connected to different welding points of the welding terminal; the welding terminal is connected to multiple groups of strain sensors; a data acquisition instrument is connected to the welding terminal through a six-wire system, and is used to collect data from the strain sensor of each measuring section, and the axial load of the structural member is tested based on the data of the strain sensor of each measuring section. The embodiment of the present invention adopts a symmetrically arranged multi-point distributed axial force measurement method, which can measure the actual operating load of key sections such as wind turbine towers in real time, form an average axial force, with higher accuracy, smaller error, more comprehensive consideration of position, and deducting the influence of bending deformation on axial force testing; avoid the situation where inaccurate local test results affect the accuracy of the axial force of the entire section, and improve the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of an embodiment of a distributed testing system for axial force of an offshore wind power structure of the present invention;

[0043] Figure 2 is a schematic diagram of a strain gauge of the present invention;

[0044] Figure 3 is a schematic diagram of an arrangement of four sets of strain sensors according to the present invention;

[0045] Figure 4It is a schematic diagram of a welding terminal of the present invention;

[0046] Figure 5 This is a schematic diagram of connecting four groups of strain sensors of the present invention;

[0047] Figure 6 is a schematic diagram of an arrangement of eight groups of strain sensors according to the present invention;

[0048] Figure 7 This is a schematic diagram of connecting four groups of strain sensors of the present invention;

[0049] Figure 8 It is a flow chart of steps of an embodiment of a distributed testing method for axial force of an offshore wind power structure of the present invention;

[0050] Fig. 9 is a structural block diagram of an electronic device provided by an embodiment of the present invention;

[0051] Fig.10 It is a structural block diagram of a storage medium provided by an embodiment of the present invention.

[0052] Description of reference numerals:

[0053] 1-structural part, 2-axial load direction, 10-strain sensor, 101-circumferential strain gauge R1, 102-circumferential strain gauge R2, 103-circumferential strain gauge R3, 104-circumferential strain gauge R4, 105-vertical strain gauge W1, 106-vertical strain gauge W2, 107-vertical strain gauge W3, 108-vertical strain gauge W4, 201-first interface, 202-second interface, 301-welding terminal part 1, 30 2-welding terminal piece two, 303-welding terminal piece three, 304-welding terminal piece four, 305-total welding terminal piece, 501-first welding point, 502-second welding point, 503-third welding point, 504-fourth welding point, 601-excitation voltage positive wire, 602-sensing lead positive wire, 603-signal positive wire, 604-excitation voltage negative wire, 605-sensing lead negative conductor wire, 606-signal negative conductor wire. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Reference Figure 1 , showing a schematic diagram of an embodiment of a distributed testing system for axial force of an offshore wind power structure of the present invention; the structure has a plurality of measuring sections perpendicular to the axial direction, and the distributed testing system for axial force of the offshore wind power structure comprises:

[0056] A plurality of groups of strain sensors 10 are symmetrically arranged on the measuring cross section; the corresponding strain sensors 10 on the plurality of measuring cross sections are aligned along the same vertical line;

[0057] Each set of strain sensors 10 includes: two strain gauges, the installation directions of the two strain gauges are vertical and adjacent; the strain gauges include a first interface 201 and a second interface 202, the first interface 201 and the second interface 202 are respectively connected to different welding points of the welding terminal.

[0058] Welding terminal pieces (not shown in the figure) connected to multiple groups of strain sensors;

[0059] A data acquisition instrument (not shown in the figure) is connected to the welding terminal through a six-wire system, and is used to collect data from the strain sensors of each measuring section, and test the axial load of the structural member based on the data from the strain sensors of each measuring section.

[0060] In an embodiment of the present invention, the measuring section of a structural member such as a tower can be determined first, and the measuring section is perpendicular to the axial direction of the structural member. A distributed test system for the axial force of an offshore wind power structural member includes a strain sensor, a welding terminal and a data acquisition instrument. Multiple groups of strain sensors are symmetrically arranged on both sides of the measuring section of the structure; the multiple groups of strain sensors are even arrays, that is, the number of strain sensors is an even number. Each group of strain sensors, that is, the strain sensors on each side, is 2 strain gauges, and the installation directions of the two strain gauges are vertical and adjacent. According to the size of structural members such as wind power towers, an even-numbered symmetrical arrangement of 4 groups, 8 groups, etc. of bilaterally symmetrical strain sensors is reasonably set to measure the average dynamic axial load of the section, and the embodiment of the present invention does not make specific limitations on this.

[0061] Multiple groups of strain sensors are connected to the welding terminal pieces respectively, and the welding terminal pieces are connected to the data acquisition instrument through a six-wire system. The data acquisition instrument can collect the data of the strain sensors through the welding terminal pieces, and test the axial load of the structural parts according to the data of the strain sensors.

[0062] Furthermore, there may be multiple measuring cross sections, and the corresponding strain sensors on the multiple measuring cross sections are aligned along the same vertical line;

[0063] The data acquisition instrument is used to collect data of the strain sensor of each measuring section, and the axial load of the structural member is tested according to the data of the strain sensor of each measuring section.

[0064] When there are multiple measurement sections, the strain gauges between the sections are aligned along the same vertical line, and the orientation of the strain sensors in the measurement section is independent of the wind direction. The measurement section can be determined based on the requirements of the structural design and safety requirements, such as determining the dangerous section as the measurement section, etc., and the embodiment of the present invention does not specifically limit this.

[0065] Specifically, please refer to Figure 2 The strain gauge includes a first interface 201 and a second interface 202 , and the first interface 201 and the second interface 202 are respectively connected to different welding points of the welding terminal.

[0066] In one example of the present invention, referring to Figure 3 The multiple groups of strain sensors are four groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0067] Further, the two mutually symmetrical groups of strain sensors are the first target strain sensor group, and the welding terminal piece includes a first welding point 501 , a second welding point 502 , a third welding point 503 and a fourth welding point 504 .

[0068] For welding terminals, please refer to Figure 4 , from left to right, they are the first welding point 501 , the second welding point 502 , the third welding point 503 and the fourth welding point 504 .

[0069] You can refer to Figure 5 , for a first target strain sensor group and one of the welding terminal pieces,

[0070] A first interface of a circumferential strain gauge of one of the strain sensors of the first target strain sensor group is connected to the first welding point;

[0071] The second interface of the circumferential strain gauge of one of the strain sensors of the first target strain sensor group and the first interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0072] The second interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0073] A first interface of a vertical strain gauge of one of the strain sensors of the target strain sensor group is connected to the first welding point;

[0074] The second interface of the vertical strain gauge of one strain sensor of the first target strain sensor group and the first interface of the vertical strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0075] The second interface of the vertical strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0076] One of the welding terminals is a main welding terminal.

[0077] The first welding point of the total welding terminal is connected to the positive electrode of the excitation voltage of the collector and the positive electrode of the sensing lead respectively;

[0078] The second welding point of the main welding terminal is connected to the positive electrode of the signal of the collector;

[0079] The third welding point of the main welding terminal is respectively connected to the negative electrode of the excitation voltage of the collector and the negative electrode of the sensing lead;

[0080] The fourth welding point of the main welding terminal is connected to the signal cathode of the collector.

[0081] First, perform force analysis to determine whether the strain gauge is positive or negative. Now define the strain gauge as the positive direction when it is subjected to tensile strain and the negative direction when it is subjected to compressive strain. For four sets of strain sensors, that is, the 8-piece method, Figure 3 As shown, the strain values ​​of the circumferential strain gauges R1 (101), R2 (102), R3 (103), and R4 (104) in the strain gauges are positive, and the strain values ​​of the vertical strain gauges W1 (106), W2 (107), W3 (108), and W4 (109) in the strain gauges are negative. Figure 5 As shown, each strain gauge has two terminal ends, and the welding terminal pieces include welding terminal piece 1 301 , welding terminal piece 2 302 , welding terminal piece 3 303 , welding terminal piece 4 and a total welding terminal piece 305 .

[0082] Connect the first terminal 201 of the strain gauge R1 to the first welding point 501 of the equipped welding terminal piece 1 301, connect the second terminal 202 of the strain gauge R1 and the first terminal 201 of the strain gauge R3 to the second welding point 502 of the equipped first welding terminal 301 at the same time, and connect the second terminal 202 of the strain gauge R3 to the fourth welding point 504 of the equipped first welding terminal 301; W1 and W3, R2 and R4, W2 and W4 use similar connection methods to complete the first step of connection. The first welding point 501 of the welding terminal 301 and the first welding point 504 of the welding terminal 4 304 are simultaneously connected to the first welding point 501 of the total welding terminal piece 305, and the others are connected in the same way in sequence to the welding terminal 2 302 and the welding terminal 3 303, and finally complete the connection of 8 strain gauges.

[0083] The connection between the main welding terminal 305 and the data acquisition instrument is as follows: connect the welding terminal 305 to the data acquisition instrument, set the sampling frequency, and perform strain data acquisition. The wires can be connected in a 6-wire system, the first welding point of the welding terminal 305 is connected to 2 wires, which are respectively connected to the positive pole of the excitation voltage of the acquisition instrument and the positive pole of the sensing lead, the second welding point is connected to 1 wire, which is connected to the positive pole of the signal of the data acquisition instrument, the third welding point is connected to 2 wires, which are respectively connected to the negative pole of the excitation voltage of the acquisition instrument and the negative pole of the sensing lead, and the fourth welding point is connected to 1 wire, which is connected to the negative pole of the signal of the acquisition instrument.

[0084] In an example of the present invention, the multiple groups of strain sensors are eight groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0085] The four groups of strain sensors arranged at intervals are divided into a second target strain sensor group and a third target strain sensor group;

[0086] The welding terminal comprises a first welding point, a second welding point, a third welding point and a fourth welding point.

[0087] The four circumferential strain gauges of the second target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the first welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the second welding point;

[0088] The four vertical strain gauges of the second target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the second welding point, and the second ends of the four vertical strain gauges connected in series are connected to the third welding point;

[0089] The four circumferential strain gauges of the third target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the third welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the fourth welding point;

[0090] The four vertical strain gauges of the third target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the first welding point, and the second ends of the four vertical strain gauges connected in series are connected to the fourth welding point.

[0091] You can refer to Figure 6 and Figure 7 , for eight groups of strain sensors, i.e., the 16-gauge method, the strain values ​​of the circumferential strain gauges R1, R2, R3, R4, R5, R6, R7, and R8 in the strain gauges are positive, and the vertical strain gauges W1, W2, W3, W4, W5, W6, W7, and W8 in the strain gauges are negative. Connect the four strain gauges R1, R3, R5, and R7 in series, then connect the four strain gauges W1, W3, W5, and W7 in series, then connect the four strain gauges R2, R4, R6, and R8 in series, and then connect the four strain gauges W2, W4, W6, and W8 in series. Finally, connect the circuit in a similar way.

[0092] The embodiment of the present invention has multiple groups of strain sensors symmetrically arranged on the measuring section; each group of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and adjacent; welding terminal pieces, connected to the multiple groups of strain sensors; a data acquisition instrument, connected to the welding terminal pieces through a six-wire system, for collecting data from the strain sensors, and testing the axial load of the structural member based on the data from the strain sensors. The embodiment of the present invention adopts a symmetrically arranged multi-point distributed axial force measurement method, which can measure the actual operating load of key sections such as wind turbine towers in real time, forming an average axial force with higher accuracy, smaller error, more comprehensive position consideration, and deducting the influence of bending deformation on the axial force test; avoiding the situation where inaccurate local test results affect the accuracy of the axial force of the entire section, thereby improving the accuracy of detection.

[0093] Reference Figure 8 , shows a flow chart of steps of an embodiment of a distributed test method for the axial force of an offshore wind power structure of the present invention, the distributed test method for the axial force of an offshore wind power structure is applied to a data acquisition instrument, and the data acquisition instrument is applied to the distributed test system for the axial force of an offshore wind power structure as described above. The distributed test system for the axial force of an offshore wind power structure can refer to the above embodiment.

[0094] The distributed testing method for the axial force of an offshore wind power structure may specifically include the following steps:

[0095] Step 801 : collecting data from the strain sensor, and testing the axial load of the structural component based on the data from the strain sensor.

[0096] In the embodiment of the present invention, the axial load of the structural member is determined by directly collecting the data of the strain sensor and calculating the axial load (force) using the data of the strain sensor. By comparing the axial load of the structural member with the rated safe axial load, it is determined whether the axial load of the super-large-sized offshore wind power structural member such as the wind turbine tower meets the requirements.

[0097] Specifically, the step of collecting data from the strain sensor and testing the axial load of the structural component according to the data from the strain sensor includes: determining the axial load by using a load calculation formula according to the data from the strain sensor.

[0098] Furthermore, the load calculation formula is:

[0099]

[0100] Among them, F Z is the axial load, A is the bridge arm coefficient, which is equal to (1+υ); υ is the Poisson's ratio of the elastic element being measured, E is the elastic modulus of the structural component, and S is the measured cross-sectional area; ε 测 The data of the strain sensor.

[0101] The strain obtained by measuring the data from the strain sensor is substituted into the load calculation formula, and then the outgoing load is determined in combination with the material mechanical parameters of the structural component itself.

[0102] The embodiments of the present invention can measure the actual operating load of key sections such as wind turbine towers in real time, specifically the axial load of components such as towers. Especially for components such as oversized towers, due to their large size, a small number of sensors cannot meet the strain measurement requirements of various control points in a circle around them. Therefore, a multi-point layout and connection method is adopted to form an average signal, which can capture the average axial force with higher accuracy and make the measurement signal more comprehensive. For offshore wind turbines, measuring the maximum load borne by the wind turbine tower is of great significance to the optimization design and simulation model verification of the wind turbine under various working conditions.

[0103] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0104] Reference Fig. 9 , an embodiment of the present invention further provides an electronic device, including:

[0105] A processor 901 and a storage medium 902, wherein the storage medium 902 stores a computer program executable by the processor 901, and when the electronic device is running, the processor 901 executes the computer program to implement a distributed testing method for the axial force of an offshore wind power structure as described in any one of the embodiments of the present invention.

[0106] The distributed testing method for the axial force of an offshore wind power structure is applied to a data acquisition instrument, and the data acquisition instrument is applied to the distributed testing system for the axial force of an offshore wind power structure as described above. The distributed testing method for the axial force of an offshore wind power structure includes:

[0107] The data of the strain sensor is collected, and the axial load of the structural component is tested according to the data of the strain sensor.

[0108] Optionally, the step of collecting data from the strain sensor and testing the axial load of the structural member according to the data from the strain sensor includes:

[0109] The axial load is determined using a load calculation formula based on the data of the strain sensor.

[0110] Optionally, the load calculation formula is:

[0111]

[0112] Among them, F Z is the axial load, A is the bridge arm coefficient, which is equal to (1+υ); υ is the Poisson's ratio of the elastic element being measured, E is the elastic modulus of the structural part, and S is the measured cross-sectional area.

[0113] Specifically, for a distributed testing system for axial force of an offshore wind power structure, the structure has a plurality of measuring sections perpendicular to the axial direction, and the distributed testing system for axial force of an offshore wind power structure comprises:

[0114] A plurality of groups of strain sensors are symmetrically arranged on the measuring cross section; the corresponding strain sensors on the plurality of measuring cross sections are aligned along the same vertical line;

[0115] Each set of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and close to each other; the strain gauges include a first interface and a second interface, the first interface and the second interface are respectively connected to different welding points of the welding terminal;

[0116] Welding terminal pieces to connect with multiple sets of strain sensors;

[0117] A data acquisition instrument is connected to the welding terminal piece through a six-wire system, and is used to collect data from the strain sensor of each measuring section, and to test the axial load of the structural member based on the data from the strain sensor of each measuring section.

[0118] Optionally, the multiple groups of strain sensors are four groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0119] Optionally, the two mutually symmetrical groups of strain sensors are the first target strain sensor group, and the welding terminal piece includes a first welding point, a second welding point, a third welding point and a fourth welding point.

[0120] Optionally, for a first target strain sensor group and one of the welding terminal pieces,

[0121] A first interface of a circumferential strain gauge of one of the strain sensors of the first target strain sensor group is connected to the first welding point;

[0122] The second interface of the circumferential strain gauge of one of the strain sensors of the first target strain sensor group and the first interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0123] The second interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0124] Optionally, a first interface of a vertical strain gauge of one of the strain sensors of the target strain sensor group is connected to the first welding point;

[0125] The second interface of the vertical strain gauge of one strain sensor of the first target strain sensor group and the first interface of the vertical strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0126] The second interface of the vertical strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0127] Optionally, one of the welding terminals is a main welding terminal.

[0128] The first welding point of the total welding terminal is connected to the positive electrode of the excitation voltage of the collector and the positive electrode of the sensing lead respectively;

[0129] The second welding point of the main welding terminal is connected to the positive electrode of the signal of the collector;

[0130] The third welding point of the main welding terminal is respectively connected to the negative electrode of the excitation voltage of the collector and the negative electrode of the sensing lead;

[0131] The fourth welding point of the main welding terminal is connected to the signal cathode of the collector.

[0132] Optionally, the multiple groups of strain sensors are eight groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0133] Optionally, the four groups of strain sensors arranged at intervals are divided into a second target strain sensor group and a third target strain sensor group;

[0134] The welding terminal comprises a first welding point, a second welding point, a third welding point and a fourth welding point.

[0135] Optionally, the four circumferential strain gauges of the second target strain sensor group are connected in series, and the first ends of the four circumferential strain gauges connected in series are connected to the first welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the second welding point;

[0136] The four vertical strain gauges of the second target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the second welding point, and the second ends of the four vertical strain gauges connected in series are connected to the third welding point;

[0137] The four circumferential strain gauges of the third target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the third welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the fourth welding point;

[0138] The four vertical strain gauges of the third target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the first welding point, and the second ends of the four vertical strain gauges connected in series are connected to the fourth welding point.

[0139] Optionally, the plurality of groups of strain sensors are an even number of groups.

[0140] The embodiment of the present invention has multiple groups of strain sensors symmetrically arranged on the measuring section; each group of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and adjacent; welding terminal pieces, connected to the multiple groups of strain sensors; a data acquisition instrument, connected to the welding terminal pieces through a six-wire system, for collecting data from the strain sensors, and testing the axial load of the structural member based on the data from the strain sensors. The embodiment of the present invention adopts a symmetrically arranged multi-point distributed axial force measurement method, which can measure the actual operating load of key sections such as wind turbine towers in real time, forming an average axial force with higher accuracy, smaller error, more comprehensive position consideration, and deducting the influence of bending deformation on the axial force test; avoiding the situation where inaccurate local test results affect the accuracy of the axial force of the entire section, thereby improving the accuracy of detection.

[0141] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the processor.

[0142] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0143] Reference Fig.10 An embodiment of the present invention further provides a computer-readable storage medium 1001, on which a computer program is stored. When the computer program is executed by a processor, a distributed testing method for the axial force of an offshore wind power structure as described in any one of the embodiments of the present invention is executed.

[0144] The distributed testing method for the axial force of an offshore wind power structure is applied to a data acquisition instrument, and the data acquisition instrument is applied to the distributed testing system for the axial force of an offshore wind power structure as described above. The distributed testing method for the axial force of an offshore wind power structure includes:

[0145] The data of the strain sensor is collected, and the axial load of the structural component is tested according to the data of the strain sensor.

[0146] Optionally, the step of collecting data from the strain sensor and testing the axial load of the structural member according to the data from the strain sensor includes:

[0147] The axial load is determined using a load calculation formula based on the data of the strain sensor.

[0148] Optionally, the load calculation formula is:

[0149]

[0150] Among them, F Z is the axial load, A is the bridge arm coefficient, which is equal to (1+υ); υ is the Poisson's ratio of the elastic element being measured, E is the elastic modulus of the structural part, and S is the measured cross-sectional area.

[0151] Specifically, for a distributed testing system for axial force of an offshore wind power structure, the structure has a plurality of measuring sections perpendicular to the axial direction, and the distributed testing system for axial force of an offshore wind power structure comprises:

[0152] A plurality of groups of strain sensors are symmetrically arranged on the measuring cross section; the corresponding strain sensors on the plurality of measuring cross sections are aligned along the same vertical line;

[0153] Each set of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and close to each other; the strain gauges include a first interface and a second interface, the first interface and the second interface are respectively connected to different welding points of the welding terminal;

[0154] Welding terminal pieces to connect with multiple sets of strain sensors;

[0155] A data acquisition instrument is connected to the welding terminal piece through a six-wire system, and is used to collect data from the strain sensor of each measuring section, and to test the axial load of the structural member based on the data from the strain sensor of each measuring section.

[0156] Optionally, the multiple groups of strain sensors are four groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0157] Optionally, the two mutually symmetrical groups of strain sensors are the first target strain sensor group, and the welding terminal piece includes a first welding point, a second welding point, a third welding point and a fourth welding point.

[0158] Optionally, for a first target strain sensor group and one of the welding terminal pieces,

[0159] A first interface of a circumferential strain gauge of one of the strain sensors of the first target strain sensor group is connected to the first welding point;

[0160] The second interface of the circumferential strain gauge of one of the strain sensors of the first target strain sensor group and the first interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0161] The second interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0162] Optionally, a first interface of a vertical strain gauge of one of the strain sensors of the target strain sensor group is connected to the first welding point;

[0163] The second interface of the vertical strain gauge of one strain sensor of the first target strain sensor group and the first interface of the vertical strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point;

[0164] The second interface of the vertical strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

[0165] Optionally, one of the welding terminals is a main welding terminal.

[0166] The first welding point of the total welding terminal is connected to the positive electrode of the excitation voltage of the collector and the positive electrode of the sensing lead respectively;

[0167] The second welding point of the main welding terminal is connected to the positive electrode of the signal of the collector;

[0168] The third welding point of the main welding terminal is respectively connected to the negative electrode of the excitation voltage of the collector and the negative electrode of the sensing lead;

[0169] The fourth welding point of the main welding terminal is connected to the signal cathode of the collector.

[0170] Optionally, the multiple groups of strain sensors are eight groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

[0171] Optionally, the four groups of strain sensors arranged at intervals are divided into a second target strain sensor group and a third target strain sensor group;

[0172] The welding terminal comprises a first welding point, a second welding point, a third welding point and a fourth welding point.

[0173] Optionally, the four circumferential strain gauges of the second target strain sensor group are connected in series, and the first ends of the four circumferential strain gauges connected in series are connected to the first welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the second welding point;

[0174] The four vertical strain gauges of the second target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the second welding point, and the second ends of the four vertical strain gauges connected in series are connected to the third welding point;

[0175] The four circumferential strain gauges of the third target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the third welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the fourth welding point;

[0176] The four vertical strain gauges of the third target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the first welding point, and the second ends of the four vertical strain gauges connected in series are connected to the fourth welding point.

[0177] Optionally, the plurality of groups of strain sensors are an even number of groups.

[0178] The embodiment of the present invention has multiple groups of strain sensors symmetrically arranged on the measuring section; each group of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and adjacent; welding terminal pieces, connected to the multiple groups of strain sensors; a data acquisition instrument, connected to the welding terminal pieces through a six-wire system, for collecting data from the strain sensors, and testing the axial load of the structural member based on the data from the strain sensors. The embodiment of the present invention adopts a symmetrically arranged multi-point distributed axial force measurement method, which can measure the actual operating load of key sections such as wind turbine towers in real time, forming an average axial force with higher accuracy, smaller error, more comprehensive position consideration, and deducting the influence of bending deformation on the axial force test; avoiding the situation where inaccurate local test results affect the accuracy of the axial force of the entire section, thereby improving the accuracy of detection.

[0179] 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.

[0180] 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.

[0181] It will be appreciated by those skilled in the art 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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 "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0187] The above describes in detail a distributed testing system for the axial force of an offshore wind power structure, a distributed testing method for the axial force of an offshore wind power structure, an electronic device and a storage medium provided by the present invention. Specific examples are used herein 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 methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A distributed testing system for axial force of offshore wind power structural components, characterized in that: The structural member has a plurality of measuring sections perpendicular to the axial direction, and the distributed testing system for the axial force of the offshore wind power structural member comprises: A plurality of groups of strain sensors are symmetrically arranged on the measuring cross section; the corresponding strain sensors on the plurality of measuring cross sections are aligned along the same vertical line; Each set of strain sensors includes: two strain gauges, the installation directions of the two strain gauges are vertical and close to each other; the strain gauges include a first interface and a second interface, the first interface and the second interface are respectively connected to different welding points of the welding terminal; Welding terminal pieces to connect with multiple sets of strain sensors; A data acquisition instrument is connected to the welding terminal piece through a six-wire system, and is used to collect data from the strain sensor of each measuring section, and to test the axial load of the structural member based on the data from the strain sensor of each measuring section.

2. The distributed testing system for axial force of offshore wind power structural components according to claim 1 is characterized in that: The multiple groups of strain sensors are four groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

3. The distributed testing system for axial force of offshore wind power structural components according to claim 2 is characterized in that: The two mutually symmetrical groups of strain sensors are the first target strain sensor group, and the welding terminal piece includes a first welding point, a second welding point, a third welding point and a fourth welding point.

4. The distributed testing system for axial force of offshore wind power structural components according to claim 3 is characterized in that: With respect to a first target strain sensor group and one of the welding terminal pieces, A first interface of a circumferential strain gauge of one of the strain sensors of the first target strain sensor group is connected to the first welding point; The second interface of the circumferential strain gauge of one of the strain sensors of the first target strain sensor group and the first interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point; The second interface of the circumferential strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

5. The distributed testing system for axial force of offshore wind power structural components according to claim 4, characterized in that: A first interface of a vertical strain gauge of one of the strain sensors of the target strain sensor group is connected to the first welding point; The second interface of the vertical strain gauge of one strain sensor of the first target strain sensor group and the first interface of the vertical strain gauge of another strain sensor of the first target strain sensor group are connected together at the second welding point; The second interface of the vertical strain gauge of another strain sensor of the first target strain sensor group is connected to the fourth welding point.

6. The distributed testing system for axial force of offshore wind power structural components according to claim 3, characterized in that: One of the welding terminals is a main welding terminal. The first welding point of the total welding terminal is connected to the positive electrode of the excitation voltage of the collector and the positive electrode of the sensing lead respectively; The second welding point of the main welding terminal is connected to the positive electrode of the signal of the collector; The third welding point of the main welding terminal is respectively connected to the negative electrode of the excitation voltage of the collector and the negative electrode of the sensing lead; The fourth welding point of the main welding terminal is connected to the signal cathode of the collector.

7. The distributed testing system for axial force of offshore wind power structural components according to claim 1, characterized in that: The multiple groups of strain sensors are eight groups of strain sensors, and the two strain gauges of each group of strain sensors are a circumferential strain gauge and a vertical strain gauge.

8. The distributed testing system for axial force of offshore wind power structural components according to claim 7, characterized in that: The four groups of strain sensors arranged at intervals are divided into a second target strain sensor group and a third target strain sensor group; The welding terminal comprises a first welding point, a second welding point, a third welding point and a fourth welding point.

9. The distributed testing system for axial force of offshore wind power structural components according to claim 8, characterized in that: The four circumferential strain gauges of the second target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the first welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the second welding point; The four vertical strain gauges of the second target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the second welding point, and the second ends of the four vertical strain gauges connected in series are connected to the third welding point; The four circumferential strain gauges of the third target strain sensor group are connected in series, the first ends of the four circumferential strain gauges connected in series are connected to the third welding point, and the second ends of the four circumferential strain gauges connected in series are connected to the fourth welding point; The four vertical strain gauges of the third target strain sensor group are connected in series, the first ends of the four vertical strain gauges connected in series are connected to the first welding point, and the second ends of the four vertical strain gauges connected in series are connected to the fourth welding point.

10. The distributed testing system for axial force of offshore wind power structural components according to claim 1, characterized in that: The multiple groups of strain sensors are an even number of groups.

11. A distributed testing method for axial force of offshore wind power structure, characterized in that: Applied to a data acquisition instrument, the data acquisition instrument is applied to a distributed testing system for the axial force of an offshore wind power structure as claimed in any one of claims 1 to 9, the method comprising: The data of the strain sensor is collected, and the axial load of the structural component is tested according to the data of the strain sensor.

12. The method according to claim 11, characterized in that The step of collecting data from the strain sensor and testing the axial load of the structural member according to the data from the strain sensor comprises: The axial load is determined using a load calculation formula based on the data of the strain sensor.

13. The method according to claim 12, characterized in that The load calculation formula is: Among them, F Z is the axial load, A is the bridge arm coefficient, which is equal to (1+υ); υ is the Poisson's ratio of the elastic element being measured, E is the elastic modulus of the structural part, and S is the measured cross-sectional area.

14. An electronic device, characterized in that: It comprises 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 steps of the distributed testing method for the axial force of an offshore wind power structure as described in any one of claims 11 to 13 are 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 steps of the distributed testing method for the axial force of an offshore wind power structure as claimed in any one of claims 11 to 13 are implemented.

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