Strain signal acquisition system of offshore wind power component

Abstract

The embodiment of the invention provides a strain signal acquisition system for an offshore wind power component, and the system comprises one or more strain gauges which are disposed on a tower of an offshore wind power generation device and are used for collecting a strain signal corresponding to the stress generated by the tower; the signal acquisition equipment is connected with the first terminal through at least six wires, one end of the first terminal is connected with the signal acquisition equipment, the other end of the first terminal is connected with the strain gauge, the signal acquisition equipment is used for receiving and processing a strain signal, and the signal acquisition equipment is internally provided with a signal output end connected with the first terminal through a first wire and a second wire; the voltage generator is connected with the first terminal through a third wire and a fourth wire; the signal comparator is connected with the first terminal through a fifth wire and a sixth wire; the signal comparator is used for adjusting the voltage generated by the voltage generator according to the comparison result of the power supply voltage and the preset voltage. According to the embodiment of the invention, the acquisition precision of the strain signal of the offshore wind power component can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of signal acquisition and transmission, and in particular to a strain signal acquisition system for offshore wind power components. Background Art

[0002] With the advancement of technology and the reduction of costs, offshore wind power generation is becoming one of the important directions of global renewable energy development.

[0003] An offshore wind turbine is a facility that uses offshore wind energy resources to generate electricity. In actual marine environments, the load on the upper part of the wind turbine of the turbine is transmitted to the tower, and then transmitted to the lower jacket foundation through the tower. Therefore, the actual load size at the connection between the jacket and the tower affects the overall stability of the device. Collecting the relevant signals of the tower load is of great reference value for the optimal design of the turbine, such as collecting the strain signal of the tower.

[0004] However, due to the oversized components of the tower, the wires for transmitting signals are too long, resulting in a large resistance in the wires themselves. The wires are also easily affected by factors such as temperature changes, making it easy for inaccurate and unstable signal collection to occur. Summary of the invention

[0005] In view of the above problems, a strain signal acquisition system for offshore wind power components is proposed to overcome the above problems or at least partially solve the above problems, including:

[0006] A strain signal acquisition system for an offshore wind power component is applied to an offshore wind power generation device. The strain signal acquisition system for an offshore wind power component comprises:

[0007] One or more strain gauges 2, wherein the strain gauges 2 are arranged on the tower of the offshore wind power generation device and are used to collect strain signals corresponding to the stress generated by the tower;

[0008] The signal acquisition device 6 is connected to the first terminal 4 through at least six wires, one end of the first terminal 4 is connected to the signal acquisition device 6, and the other end is connected to the strain gauge 2. The signal acquisition device 6 is used to receive and process the strain signal. The signal acquisition device 6 is internally provided with:

[0009] A signal output terminal, the signal output terminal is connected to the first terminal 4 through a first wire 603 and a second wire 606;

[0010] A voltage generator 702, wherein the voltage generator 702 is connected to the first terminal 4 via a third wire 601 and a fourth wire 604;

[0011] A signal comparator 703, wherein the signal comparator 703 is connected to the first terminal 4 via a fifth wire 602 and a sixth wire 605; wherein the signal comparator 703 is used to compare the supply voltage of the strain gauge 2 with a preset voltage, and adjust the voltage generated by the voltage generator 702 according to the comparison result between the supply voltage and the preset voltage.

[0012] Optionally, comparing the supply voltage of the strain gauge 2 with a preset voltage, and adjusting the voltage generated by the voltage generator 702 according to the comparison result between the supply voltage and the preset voltage, includes:

[0013] If the supply voltage is less than the preset voltage, the voltage generator 702 is adjusted to increase the generated voltage so that the supply voltage is equal to the preset voltage.

[0014] Optionally, the first wire 603 is a positive signal wire, and the second wire 606 is a negative signal wire.

[0015] Optionally, the third wire 601 is a positive excitation voltage wire, and the fourth wire 604 is a negative excitation voltage wire.

[0016] Optionally, the fifth wire 602 is a positive sensing lead, and the sixth wire 605 is a negative sensing lead.

[0017] Optionally, the first terminal 4 is provided with at least four welding points, and the at least four welding points include:

[0018] A first welding point 307, wherein the first welding point 307 is used for welding the first wire 603;

[0019] A second welding point 305, wherein the second welding point 305 is used for welding the second wire 606;

[0020] A third welding point 306, wherein the third welding point 306 is used to weld the fourth wire 604 and the sixth wire 605;

[0021] The fourth welding point 304 is used to weld the third wire 601 and the fifth wire 602 .

[0022] Optionally, the signal output end is provided with a signal amplifier 700, and the signal amplifier 700 is used to amplify the strain signal to obtain a target strain signal.

[0023] Optionally, the signal amplifier 700 is connected to an electric meter 701 , and the electric meter 701 is used to measure the target strain signal.

[0024] Optionally, when there are multiple strain gauges 2, the multiple strain gauges 2 are symmetrically arranged in two groups on the tower, and the multiple strain gauges 2 form a full-bridge circuit.

[0025] Optionally, the strain gauge 2 is connected to the first terminal 4 via a second terminal.

[0026] Optionally, the signal acquisition device (6) is provided with a sampling frequency, and the signal acquisition device (6) receives the strain signal via the sampling frequency.

[0027] Optionally, the electric meter (701) includes an ammeter or a voltmeter.

[0028] Optionally, the positive excitation voltage wire is responsible for providing a positive voltage of the power supply, and the negative excitation voltage wire is responsible for providing a negative voltage of the power supply.

[0029] Optionally, the positive sensing lead is used to transmit the positive voltage portion of the supply voltage signal, and the negative sensing lead is used to transmit the negative voltage portion of the supply voltage signal.

[0030] An offshore wind power generation device comprises the strain signal acquisition system for offshore wind power components as described above.

[0031] The embodiment of the present invention has the following advantages: the strain signal acquisition system for offshore wind power components provided by the embodiment of the present invention includes: one or more strain gauges, which are arranged on the tower of the offshore wind power generation device and are used to collect strain signals corresponding to the stress generated by the tower; a signal acquisition device, which is connected to the first terminal through at least six wires, one end of the first terminal is connected to the signal acquisition device, and the other end is connected to the strain gauge, the signal acquisition device is used to receive and process the strain signal, and is internally provided with: a signal output terminal, which is connected to the first terminal through a first wire and a second wire; a voltage generator, which is connected to the first terminal through a third wire and a fourth wire; a signal comparator, which is connected to the first terminal through a fifth wire and a sixth wire; wherein the signal comparator is used to adjust the voltage generated by the voltage generator according to the comparison result between the power supply voltage and the preset voltage, and the voltage generated by the voltage generator is adjusted by the signal comparator, so that the power supply voltage of the strain gauge is maintained at a normal level, thereby making the transmission of the strain signal collected by the strain gauge more stable and more accurate, and reducing the adverse effects of factors such as wire resistance or temperature changes on the accuracy of strain signal acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 It is a schematic diagram of the arrangement of a strain signal collection system for an offshore wind power component on a tower provided by an embodiment of the present invention;

[0034] Figure 2 is a circuit connection relationship diagram of a signal acquisition device and a first terminal provided by an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of the distribution of welding points of a first terminal provided by an embodiment of the present invention;

[0036] Figure 4 It is a wiring diagram of a strain gauge connected to a first terminal via a second terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] With the advancement of technology and the reduction of costs, offshore wind power generation is becoming one of the important directions of global renewable energy development.

[0039] An offshore wind turbine is a facility that uses offshore wind energy resources to generate electricity. In actual marine environments, the upper load of the wind turbine of the turbine is transmitted to the tower, and then transmitted to the lower conductor frame foundation through the tower. Therefore, the actual load size at the connection between the conductor frame and the tower affects the overall stability of the device. There are 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. Collecting the relevant signals of the tower load is of great reference value for the optimal design of the power generation device, such as collecting the strain signal of the tower.

[0040] However, due to the oversized components of the tower, the wires for transmitting signals are too long, resulting in a large resistance in the wires themselves. The wires are also easily affected by factors such as temperature changes, making it easy for inaccurate and unstable signal collection to occur.

[0041] An embodiment of the present invention provides a strain signal acquisition system for an offshore wind power component, which is applied to an offshore wind power generation device. The strain signal acquisition system for an offshore wind power component includes:

[0042] One or more strain gauges 2, wherein the strain gauges 2 are arranged on the tower of the offshore wind power generation device and are used to collect strain signals corresponding to the stress generated by the tower;

[0043] A strain gauge is a sensor used to measure the strain of an object. Strain refers to the deformation of an object due to the action of an external object, usually expressed as a percentage change in length. When an object generates stress, the strain gauge can collect corresponding strain signals, such as resistance signals, voltage signals, etc., to reflect the size of the strain generated by the object through the size of these strain signals.

[0044] In a specific implementation, the section of the tower of an offshore wind power generation device can be selected as the measurement section, and the strain gauge 2 can be set according to the torque direction of the tower. As an example, Figure 1 As shown, the cross section of the tower 1 is a circular ring structure, and a plurality of strain gauges 2 can be arranged on both sides of the tower according to the torque direction 3 of the tower and along the measuring cross section.

[0045] In some embodiments of the present invention, when there are multiple strain gauges 2, the multiple strain gauges 2 are symmetrically arranged in two groups on the tower, and the multiple strain gauges 2 form a full-bridge circuit.

[0046] A full-bridge circuit is a circuit consisting of four bridge arms, each of which is composed of a controllable switch tube and a diode in parallel. Every two bridge arms are connected in series, and then the two series bridge arms are connected in parallel. The input end is connected to the two ends of the series bridge arm, and the output end is the midpoint of the two series bridge arms. The load is connected between the midpoints of the two series bridge arms like a bridge, hence the name full-bridge circuit.

[0047] In the specific implementation, Figure 1 As shown, the four strain gauges 2 can be divided into two groups, each group of two strain gauges, which are symmetrically arranged on both sides of the tower of the offshore wind power generation device. Furthermore, the four strain gauges form a full-bridge circuit, in which the resistance of two strain gauges increases when they are pulled, and the resistance of the other two strain gauges decreases when they are compressed. This setting makes the output voltage of the bridge proportional to the change of strain, which can improve the sensitivity of collecting strain signals.

[0048] The signal acquisition device 6 is connected to the first terminal 4 through at least six wires, one end of the first terminal 4 is connected to the signal acquisition device 6, and the other end is connected to the strain gauge 2. The signal acquisition device 6 is used to receive and process the strain signal. The signal acquisition device 6 is internally provided with:

[0049] A signal output terminal, the signal output terminal is connected to the first terminal 4 through a first wire 603 and a second wire 606;

[0050] A voltage generator 702, wherein the voltage generator 702 is connected to the first terminal 4 via a third wire 601 and a fourth wire 604;

[0051] A signal comparator 703, wherein the signal comparator 703 is connected to the first terminal 4 via a fifth wire 602 and a sixth wire 605; wherein the signal comparator 703 is used to compare the supply voltage of the strain gauge 2 with a preset voltage, and adjust the voltage generated by the voltage generator 702 according to the comparison result between the supply voltage and the preset voltage.

[0052] In this embodiment, as an example, the signal acquisition device 6 can be arranged in the tower as follows: Figure 1 As shown, in Figure 1 In the example, the signal acquisition device 6 is connected via six wires ( Figure 1 The six wires numbered 5 in the figure are connected to the first terminal 4, the first terminal 4 is connected to the strain gauge 2, and the wires connected between the first terminal 4 and the strain gauge 2 are connected to the first terminal 4. Figure 1 Not shown in the figure.

[0053] In practical applications, a sampling frequency may be set for the signal acquisition device 6 so that the signal acquisition device 6 acquires strain signals based on the sampling frequency.

[0054] In this embodiment, the first wire 603 and the second wire 606 are wires used to transmit the strain signal collected by the strain gauge 2. The strain signal is transmitted to the signal acquisition device 6 through the first wire 603 and the second wire 606, and then output through the signal output end of the signal acquisition device 6; the third wire 601 and the fourth wire 604 are wires used to power the strain gauge 2 and provide a power supply voltage.

[0055] In practical applications, although the third wire 601 and the fourth wire 604 are also connected to the voltage loop where the first wire 603 and the second wire 606 are located, the circuit has resistance but no current (the potentiometer does not use current during measurement and the internal resistance is considered to be infinite), so the resistance of the third wire 601 and the fourth wire 604 themselves has no effect on the measurement of the strain signal.

[0056] In a specific implementation, the wire connection relationship between the signal acquisition device 6 and the first terminal 4 can be as follows: Figure 2 As shown, in Figure 2In the figure, the signal output terminal inside the signal acquisition device 6 is connected through the first wire 603 and the first terminal 4 of the second wire 606. The first wire 603 and the second wire 606 transmit the strain signal collected by the strain gauge 2 to the signal output terminal, that is, the measured voltage V0. The wire resistance corresponding to the first wire 603 is RL6, that is, the resistance 503, and the wire resistance corresponding to the second wire 606 is RL3, that is, the resistance 506; the voltage generator 702 ( Figure 2 The voltage generator 702 can generate a voltage VG. The third wire 601 and the fourth wire 604 provide a supply voltage Vs for the strain gauge. The wire resistance corresponding to the third wire 601 is RL1, that is, resistance 501. The wire resistance corresponding to the fourth wire 604 is RL4, that is, resistance 504. The signal comparator 703 ( Figure 2 The fifth wire 602 corresponds to a wire resistance RL2, that is, resistance 502, and the sixth wire 605 corresponds to a wire resistance RL1, that is, resistance 501.

[0057] In this embodiment, since the third wire 601 and the fourth wire 604 used to supply power to the strain gauge 2 have a certain resistance, and due to factors such as temperature changes, their resistance may further increase, resulting in the strain gauge 2 may obtain a smaller supply voltage, which in turn leads to unstable strain signal transmission and reduced accuracy of the strain signal. The signal comparator 703 can compare the supply voltage with the preset voltage. If the supply voltage is equal to the preset voltage, no current passes through the fifth wire 602 and the sixth wire 605, and the wire resistance corresponding to the fifth wire 602 and the wire resistance corresponding to the sixth wire 605 are not adversely affected, indicating that the strain signal transmission is normal; if the supply voltage deviates from the preset voltage, it means that the strain signal transmission is affected, which will cause the accuracy of the strain signal to decrease. At this time, the signal comparator 703 adjusts the voltage generated by the voltage generator 702 to maintain the supply voltage in the same circuit at a normal level, ensuring the stability of the strain signal transmission and the accuracy of the strain signal.

[0058] As an example, Figure 2 As shown, whenever the signal comparator 703 detects that the supply voltage Vs deviates from the reference voltage Vref (ie, Figure 2 When the preset voltage 704 in the input signal is reached, the signal comparator 703 automatically adjusts the voltage VG generated by the voltage generator 702, so that the adverse factors are corrected in real time, thereby maintaining the supply voltage Vs at a normal level. The strain signal V0 corresponds to the actual measurement value at any time point, effectively improving the accuracy of the strain signal.

[0059] In some embodiments of the present invention, comparing the supply voltage of the strain gauge 2 with a preset voltage, and adjusting the voltage generated by the voltage generator 702 according to the comparison result between the supply voltage and the preset voltage, includes:

[0060] If the supply voltage is less than the preset voltage, the voltage generator 702 is adjusted to increase the generated voltage so that the supply voltage is equal to the preset voltage.

[0061] In this embodiment, if the signal comparator 703 detects that the supply voltage of the strain gauge 2 is less than a preset voltage, such as a reference voltage of a circuit, the voltage generated by the voltage generator 702 can be increased so that the supply voltage is equal to the preset voltage, and the required voltage is normally supplied to the strain gauge 2, thereby ensuring the stability of the strain signal transmission and the accuracy of the strain signal.

[0062] In some embodiments of the present invention, the first wire 603 is a positive signal wire, and the second wire 606 is a negative signal wire.

[0063] In this embodiment, the positive signal wire connects the positive pole of the signal source to the signal receiving device or load in the circuit, and correspondingly, the negative signal wire connects the negative pole of the signal source to the signal receiving device or load. The positive signal wire and the negative signal wire work together to transmit the strain signal.

[0064] In some embodiments of the present invention, the third wire 601 is a positive excitation voltage wire, and the fourth wire 604 is a negative excitation voltage wire.

[0065] The excitation voltage is used to activate the power supply of the sensor or measuring element so that it can work normally and generate an output signal.

[0066] In this embodiment, the positive excitation voltage wire is responsible for providing the positive voltage part of the power supply, and the negative excitation voltage wire is responsible for providing the negative voltage part of the power supply. The positive excitation voltage wire and the negative excitation voltage wire work together to ensure that the strain gauge 2 can work normally.

[0067] In some embodiments of the present invention, the fifth wire 602 is a positive sensing lead, and the sixth wire 605 is a negative sensing lead.

[0068] In this embodiment, the positive sensing lead is used to transmit the positive voltage portion of the supply voltage signal, and the negative sensing lead is used to transmit the negative voltage portion of the supply voltage signal. The positive sensing lead and the negative sensing lead work together to transmit the supply voltage signal to the signal comparator 703, so that the signal comparator 703 compares the supply voltage with a preset voltage.

[0069] In some embodiments of the present invention, the first terminal 4 is provided with at least four welding points, and the at least four welding points include:

[0070] A first welding point 307, wherein the first welding point 307 is used for welding the first wire 603;

[0071] A second welding point 305, wherein the second welding point 305 is used for welding the second wire 606;

[0072] A third welding point 306, wherein the third welding point 306 is used to weld the fourth wire 604 and the sixth wire 605;

[0073] The fourth welding point 304 is used to weld the third wire 601 and the fifth wire 602 .

[0074] In this embodiment, the arrangement of the welding point of the first terminal 4 is as follows: Figure 3 As shown, at least four welding points are included, namely a fourth welding point 304 , a second welding point 305 , a third welding point 306 , and a first welding point 307 .

[0075] As an example, the welding relationship between the welding point and the wire can be as follows: Figure 2 As shown, in Figure 2 In the figure, the first wire 603 is welded to the first terminal 4 through the first welding point 307, the second wire 606 is welded to the first terminal 4 through the second welding point 305, the fourth wire 604 and the sixth wire 605 are welded to the first terminal 4 through the third welding point 306, and the third wire 601 and the fifth wire 602 are welded to the first terminal 4 through the fourth welding point 304. It should be noted that in order to intuitively display the relationship between the wires in the circuit, Figure 2 The positions of the first welding point 307 and the third welding point 306 are swapped, and the actual welding point sequence should be the fourth welding point 304, the second welding point 305, the third welding point 306, and the first welding point 307.

[0076] In practical applications, the welding relationship between the first wire 603, the second wire 606, the third wire 601, the fourth wire 604, the fifth wire 602, the sixth wire 605 and the first terminal 4 can be as follows: Figure 4 shown.

[0077] In some embodiments of the present invention, the signal output end is provided with a signal amplifier 700, and the signal amplifier 700 is used to amplify the strain signal to obtain a target strain signal.

[0078] In the specific implementation, Figure 2As shown, the signal amplifier 700 is arranged at the signal output end where the first wire 603 and the second wire 606 are connected. The signal amplifier 700 can amplify the strain signal output by the strain gauge and output a more stable and reliable signal to facilitate signal acquisition; and the signal amplifier 700 has an extremely high internal impedance and does not absorb current, so it has no effect on the current passing through the first wire 603 and the second wire 606. In addition, the voltage drop caused by the first wire 603 and the second wire 606 in the current loop is not within the measurement range, so the wire resistance 503 corresponding to the first wire 603 and the wire resistance 506 corresponding to the second wire 606 have no effect on the result of measuring the strain signal.

[0079] In some embodiments of the present invention, the signal amplifier 700 is connected to an electric meter 701, and the electric meter 701 is used to measure the target strain signal.

[0080] In the specific implementation, Figure 2 As shown, the signal amplifier 700 is also connected to an electric meter 701, which is used to read the target strain signal obtained by signal amplification to reflect the strain condition of the tower. The electric meter 701 can be a measuring instrument such as an ammeter or a voltmeter.

[0081] In some embodiments of the present invention, the strain gauge 2 is connected to the first terminal 4 via a second terminal.

[0082] In the specific implementation, Figure 4 As shown, the strain gauge 2 is first connected to the second terminal through a plurality of wires, and then a plurality of wires are led out from the second terminal to be connected to the first terminal 4.

[0083] An embodiment of the present invention further provides an offshore wind power generation device, wherein the offshore wind power generation device comprises the strain signal acquisition system for offshore wind power components as described above.

[0084] The embodiment of the present invention has the following advantages: the strain signal acquisition system for offshore wind power components provided by the embodiment of the present invention includes: one or more strain gauges, which are arranged on the tower of the offshore wind power generation device and are used to collect strain signals corresponding to the stress generated by the tower; a signal acquisition device, which is connected to the first terminal through at least six wires, one end of the first terminal is connected to the signal acquisition device, and the other end is connected to the strain gauge, the signal acquisition device is used to receive and process the strain signal, and is internally provided with: a signal output terminal, which is connected to the first terminal through a first wire and a second wire; a voltage generator, which is connected to the first terminal through a third wire and a fourth wire; a signal comparator, which is connected to the first terminal through a fifth wire and a sixth wire; wherein the signal comparator is used to adjust the voltage generated by the voltage generator according to the comparison result between the power supply voltage and the preset voltage, and the voltage generated by the voltage generator is adjusted by the signal comparator, so that the power supply voltage of the strain gauge is maintained at a normal level, thereby making the transmission of the strain signal collected by the strain gauge more stable and more accurate, and reducing the adverse effects of factors such as wire resistance or temperature changes on the accuracy of strain signal acquisition.

[0085] 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 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 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 device including the elements.

[0086] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0087] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system 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.

[0088] The strain signal acquisition system for an offshore wind power component provided is 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 general technicians in this field, 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 strain signal acquisition system for offshore wind power components, characterized in that: Applied to an offshore wind power generation device, the strain signal acquisition system of the offshore wind power component comprises: One or more strain gauges (2), wherein the strain gauges (2) are arranged on the tower of the offshore wind power generation device and are used to collect strain signals corresponding to the stress generated by the tower; A signal acquisition device (6), the signal acquisition device (6) being connected to the first terminal (4) via at least six wires, one end of the first terminal (4) being connected to the signal acquisition device (6), and the other end of the first terminal (4) being connected to the strain gauge (2), the signal acquisition device (6) being used to receive and process the strain signal, and the signal acquisition device (6) being internally provided with: A signal output end, the signal output end being connected to the first terminal (4) via a first wire (603) and a second wire (606); A voltage generator (702), the voltage generator (702) being connected to the first terminal (4) via a third wire (601) and a fourth wire (604); A signal comparator (703), the signal comparator (703) being connected to the first terminal (4) via a fifth wire (602) and a sixth wire (605); wherein the signal comparator (703) is used to compare the supply voltage of the strain gauge (2) with a preset voltage, and to adjust the voltage generated by the voltage generator (702) according to the comparison result between the supply voltage and the preset voltage.

2. The strain signal acquisition system for offshore wind power components according to claim 1, characterized in that: The step of comparing the supply voltage of the strain gauge (2) with a preset voltage and adjusting the voltage generated by the voltage generator (702) according to the comparison result between the supply voltage and the preset voltage comprises: If the supply voltage is less than the preset voltage, the voltage generator (702) is adjusted to increase the generated voltage so that the supply voltage is equal to the preset voltage.

3. The strain signal acquisition system for offshore wind power components according to claim 1, characterized in that: The first wire (603) is a positive signal wire, and the second wire (606) is a negative signal wire.

4. The strain signal acquisition system for offshore wind power components according to claim 1, characterized in that: The third wire (601) is a positive excitation voltage wire, and the fourth wire (604) is a negative excitation voltage wire.

5. The strain signal acquisition system for offshore wind power components according to claim 1, characterized in that: The fifth wire (602) is a positive electrode sensing lead, and the sixth wire (605) is a negative electrode sensing lead.

6. The strain signal acquisition system for offshore wind power components according to any one of claims 1 to 4, characterized in that: The first terminal (4) is provided with at least four welding points, and the at least four welding points include: A first welding point (307), the first welding point (307) being used to weld the first wire (603); A second welding point (305), the second welding point (305) being used for welding the second wire (606); A third welding point (306), the third welding point (306) being used to weld the fourth wire (604) and the sixth wire (605); A fourth welding point (304), the fourth welding point (304) is used to weld the third wire (601) and the fifth wire (602).

7. The strain signal acquisition system for offshore wind power components according to any one of claims 1 to 4, characterized in that: The signal output end is provided with a signal amplifier (700), and the signal amplifier (700) is used to amplify the strain signal to obtain a target strain signal.

8. The strain signal acquisition system for offshore wind power components according to claim 7, characterized in that: The signal amplifier (700) is connected to an electric meter (701), and the electric meter (701) is used to measure the target strain signal.

9. The strain signal acquisition system for offshore wind power components according to any one of claims 1 to 4, characterized in that: When there are multiple strain gauges (2), the multiple strain gauges (2) are symmetrically arranged in two groups on the tower, and the multiple strain gauges (2) form a full-bridge circuit.

10. The strain signal acquisition system for offshore wind power components according to any one of claims 1 to 4, characterized in that: The strain gauge (2) is connected to the first terminal (4) via a second terminal.

11. The strain signal acquisition system for offshore wind power components according to claim 1, characterized in that: The signal acquisition device (6) is provided with a sampling frequency, and the signal acquisition device (6) receives the strain signal through the sampling frequency.

12. The strain signal acquisition system for offshore wind power components according to claim 8, characterized in that: The electric meter (701) comprises an ammeter or a voltmeter.

13. The strain signal acquisition system for offshore wind power components according to claim 4, characterized in that: The positive excitation voltage wire is responsible for providing a positive voltage of the power supply, and the negative excitation voltage wire is responsible for providing a negative voltage of the power supply.

14. The strain signal acquisition system for offshore wind power components according to claim 5, characterized in that: The positive sensing lead is used to transmit the positive voltage portion of the power supply voltage signal, and the negative sensing lead is used to transmit the negative voltage portion of the power supply voltage signal.

15. An offshore wind power generation device, characterized in that: The offshore wind power generation device comprises the strain signal acquisition system for offshore wind power components as described in any one of claims 1-14.

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