Blade integrity monitoring system and method

Abstract

The present invention proposes a blade integrity monitoring system and method, the system includes: blades, pressure sensors, wind farm centralized control center and alarm, the method includes: obtaining pressure information of the blades through the pressure sensor; determining the pressure state level of the blades according to the pressure information; sending integrity warning prompt instructions to the alarm according to the pressure state level. In this way, blade damage can be discovered in time and maintenance personnel can be reminded to perform maintenance.

Description

Technical Field

[0001] The present invention relates to the field of blade status monitoring, and in particular to a blade integrity monitoring system and method. Background Art

[0002] When the blades of existing wind turbines are in operation, they will generate a large centrifugal force due to their long length. If microcracks appear on the blades and are not treated in time, penetrating cracks will gradually form until the blades break. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to a certain extent.

[0004] To this end, the present invention proposes a blade integrity monitoring system and method. By applying the blade integrity monitoring system and method, early microcracks in the blade can be discovered in time for easy processing, thereby reducing blade losses.

[0005] The present invention provides a blade integrity monitoring system, comprising:

[0006] A blade, wherein the blade is in a positive pressure state;

[0007] a pressure sensor mounted on an inner side wall of the blade;

[0008] A wind farm centralized control center, wherein the wind farm centralized control center is wirelessly connected to the pressure sensor, and a data output end of the wind farm centralized control center is connected to an alarm.

[0009] In some embodiments, the pressure sensor is installed at a preset installation point on the inner wall of the blade, wherein the preset installation point is determined based on a location in the blade where microcracks are prone to occur; and the measuring range of the pressure sensor includes a preset pressure range.

[0010] In some embodiments, the system further includes a blade root flange and a hollow structure, wherein the blade root flange is sealingly connected to the hollow structure to form a closed space in the blade.

[0011] In some embodiments, the system further includes a temperature compensation module, a pressure regulation module, a blade state determination module, and a pressure data transmission module, wherein:

[0012] The temperature compensation module is connected to the pressure sensor;

[0013] One end of the pressure regulating module is connected to the blade root flange, and the other end is connected to the pressure sensor;

[0014] The pressure data transmission module is respectively connected to the pressure sensor, the temperature compensation module and the pressure regulating module;

[0015] The blade state determination module is installed in the wind farm centralized control center, and is wirelessly connected to the temperature compensation module, the pressure regulation module and the pressure sensor through the pressure data transmission module.

[0016] In some embodiments, the system further includes an exhaust valve and an air charging valve, wherein the exhaust valve is connected to the pressure regulating module via a blade root flange; and the air charging valve is mounted on the blade root flange and communicates with the enclosed space.

[0017] In some embodiments, the hollow structure has a mesh space that can withstand the maximum pressure within the preset pressure range.

[0018] The present invention provides a blade integrity monitoring method, comprising:

[0019] Acquiring pressure information of the blade through the pressure sensor;

[0020] Determining the pressure state level of the blade according to the pressure information;

[0021] According to the pressure state level, an integrity warning prompt instruction is sent to the alarm.

[0022] In some embodiments, determining the pressure state level of the blade according to the pressure information includes:

[0023] Obtaining the intra-blade pressure difference percentage of each blade;

[0024] Determining the pressure difference level of each blade according to the pressure difference percentage within the blade;

[0025] According to the pressure difference level, obtaining the blade pressure of the blade;

[0026] The pressure state level of the blade is determined according to the blade pressure.

[0027] In some embodiments, determining the pressure difference level of each blade according to the pressure difference percentage within the blade includes:

[0028] Determining a blade pressure difference percentage level range according to the blade internal pressure difference percentage;

[0029] The pressure difference level of the blade is determined according to the blade pressure difference percentage level range.

[0030] In some embodiments, determining the pressure state level of the blade according to the blade pressure includes:

[0031] According to the blade pressure, determining a blade pressure level range;

[0032] The pressure state level of the blade is determined according to the blade pressure level range.

[0033] In some embodiments, if the pressure difference level is the second level, an integrity warning prompt instruction is sent to the alarm.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A structural diagram of a blade integrity monitoring system provided by an embodiment of the present invention;

[0036] Figure 2 A flowchart of a blade integrity monitoring method provided by an embodiment of the present invention;

[0037] Figure 3 A pressure trend curve diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0039] A blade integrity monitoring system and method according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0040] In the related technology, the blades of wind turbines are basically made of glass fiber and epoxy resin and are produced by micro-vacuum infusion. The inside of the blade is a hollow structure. If micro-cracks appear on the blade during operation and are not treated in time, they will gradually develop into small cracks, or even large cracks, until the blade breaks. When micro-cracks appear on the blade, if they can be discovered and stopped for treatment in time, the probability of blade damage can be reduced.

[0041] Based on this, a blade integrity monitoring system is proposed in an embodiment of the present invention, which is applied to wind turbine blades and can improve the accuracy and precision of blade status detection, help users to promptly detect early microcracks, and reduce equipment failure losses.

[0042] Figure 1 A structural diagram of a blade integrity monitoring system provided in an embodiment of the present invention.

[0043] like Figure 1As shown, the blade integrity monitoring system includes: a blade 1, which is in a positive pressure state; a pressure sensor 2, which is installed on the inner side wall of the blade 1; a wind farm control center 3, which is wirelessly connected to the pressure sensor 2, and the data output end of the wind farm control center 3 is connected to the alarm 4.

[0044] In this embodiment, before the blade 1 is operated, slightly positive pressure air is added into its chamber to form a slightly positive pressure state in the blade chamber. The so-called slightly positive pressure means that the pressure is less than or equal to 1kg / cm 2 . When cracks appear on blade 1, the integrity of the blade can be determined by monitoring the pressure state in the blade chamber. Here, pressure fluctuations in the blade chamber may also be caused by insufficient air tightness in the blade chamber, such as air leakage in the sealing structure of the blade. Since the pressure state in the blade monitored by the blade integrity monitoring system of the embodiment of the present invention is mainly used as reference data for operation and maintenance personnel to inspect and repair the equipment, when it is detected that the pressure state fluctuates due to insufficient air tightness of the blade, the operation and maintenance personnel will also shut down the blade and handle the fault. Because the blade integrity monitoring system of the embodiment of the present invention is highly sensitive to pressure fluctuations in the blade chamber, no matter what causes the pressure fluctuations in the blade, it can be displayed in a timely manner on the display device of the wind farm control center.

[0045] In this embodiment, the wind farm centralized control center 3 can be installed on the ground to collect the operating parameters and fault information of the blade 1. A wind farm centralized control center can manage multiple wind turbines at the same time, and the operation and maintenance personnel can maintain the blades in time according to the blade operation information obtained by the wind farm centralized control center.

[0046] In this embodiment, in order to promptly remind the maintenance personnel to maintain the blades, when the pressure inside the blades reaches a certain level, an early warning message will be issued through the alarm 4. The early warning message will be stored in the data of the wind farm centralized control center so that the maintenance personnel can check it according to actual needs.

[0047] As a possible implementation, the pressure sensor 2 is installed at a preset installation point on the inner wall of the blade 1, wherein the preset installation point is determined according to a position where microcracks are prone to occur in the blade; and the measuring range of the pressure sensor includes a preset pressure range.

[0048] In this embodiment, during the manufacturing process of the blade, the preset installation point of the pressure sensor 2 is determined by theoretical derivation and load simulation calculation software according to the blade load calculation results. The preset installation point is generally located near the position where microcracks are prone to appear on the blade, so that the position of the crack can be accurately and effectively found according to the feedback data of the pressure sensor 2. Here, the maximum range of the pressure sensor should be greater than or equal to the critical value of the set micro-positive pressure of 1kg / cm 2 , so that the pressure sensor 2 can continuously output a pressure trend curve.

[0049] As a possible implementation, the system further includes a blade root flange 8 and a hollow structure, and the blade root flange 8 is sealedly connected to the hollow structure to form a closed space in the blade 1.

[0050] In this embodiment, during the production of the blade, after sealing the connection between the blade root flange 8 and the hollow structure of the blade, slightly positive pressure air is added into the blade chamber for air tightness test to ensure that the hollow structure of the blade is in a sealed effect, so that the pressure sensor 2 can monitor the pressure change in the blade chamber. During the transportation of the blade, the slightly positive pressure air in the blade chamber needs to be discharged to keep the pressure inside and outside the blade consistent, so as to reduce the possibility of cracks forming on the blade during transportation. In the embodiment of the present invention, the blade chamber mainly refers to the hollow structure of the blade.

[0051] As a possible implementation, the system further includes a temperature compensation module 5, a pressure regulation module 5, a blade state determination module 11 and a pressure data transmission module 7, wherein:

[0052] The temperature compensation module 5 is connected to the pressure sensor 2; one end of the pressure regulating module 6 is connected to the blade root flange 8, and the other end is connected to the pressure sensor 2; the pressure data transmission module 7 is respectively connected to the pressure sensor 2, the temperature compensation module 5 and the pressure regulating module 6; the blade state determination module 11 is installed in the wind farm control center 3, and is wirelessly connected to the temperature compensation module 5, the pressure regulating module 6 and the pressure sensor 2 through the pressure data transmission module 7.

[0053] In this embodiment, taking into account the influence of summer and winter temperatures, if the area where the blades are used has a large temperature difference throughout the year, a pressure regulating module 6 is provided to maintain a stable micro-positive pressure state in the blades. When the temperature difference is large throughout the year, in seasons with higher temperatures, if the system detects that the pressure of the three blades of the wind turbine increases synchronously to an over-limit pressure, a portion of the gas will be automatically discharged to maintain the pressure of the blades within a normal range if the blades are intact; if the system detects that the pressure of the three blades decreases synchronously to an over-limit pressure, the operation and maintenance personnel will be prompted to add gas to maintain the pressure of the blades within a normal range if the blades are intact. Here, the normal range of pressure in the blades is (0, 1kg / cm 2 ].

[0054] In this embodiment, the temperature compensation module 5 is generally made of nonlinear elements and is used to compensate for the zero drift and sensitivity drift in the circuit of the pressure sensor 2 .

[0055] In this embodiment, the pressure data transmission module 7 has the function of unlimited data transmission, similar to Bluetooth, and can automatically report the data in the pressure sensor 2, the temperature compensation module 5 and the pressure regulation module 6 to the wind farm centralized control center 3. Correspondingly, in the wind farm centralized control center 3, the data reported by the pressure data transmission module 7 is received through the blade state determination module 11. The blade state determination module 11 also has the function of unlimited data transmission.

[0056] It should be noted that in actual use, if the pressure sensor 2, temperature compensation module 5, pressure regulating module 6, pressure data transmission module 7, exhaust valve 9, blade status determination module 11, wind farm control center 3 and alarm 4 in the above-mentioned embodiment require power support, the blade integrity monitoring system described in the embodiment of the present invention should also have a power supply.

[0057] As a possible implementation, the system further includes an exhaust valve 9 and an air charging valve 10. The exhaust valve 9 is connected to the pressure regulating module 6 via a blade root flange 8. The air charging valve 10 is installed on the blade root flange 8 and communicates with the closed space.

[0058] In this embodiment, the exhaust valve 9 is an automated device that can automatically discharge excess gas in the blade chamber in response to the instruction of the pressure regulating module 6. The inflation valve 10 is a purely mechanical device. When the operation and maintenance personnel learn that the pressure in the blade chamber is insufficient based on the information from the wind farm centralized control center 3, the inflation valve 10 can be used to replenish gas in the blade chamber.

[0059] As a possible implementation manner, the hollow structure has a mesh space and can withstand the maximum pressure within the preset pressure range.

[0060] In this embodiment, the mesh space in the hollow structure of the blade 1 has a supporting structure design, which can support the blade to withstand the maximum pressure of the slight positive pressure inside the blade, that is, 1kg / cm 2 .

[0061] It should be noted that the wind farm centralized control center 3 described in the embodiment of the present invention can perform permission settings. Specifically, it can perform personalized settings according to the actual needs of operation and maintenance personnel and manufacturers.

[0062] In order to realize blade integrity monitoring, corresponding to the blade integrity monitoring system described in the previous embodiment of the present invention, the embodiment of the present invention further provides a blade integrity monitoring method, which is applied to the wind farm centralized control center 3 in the blade integrity monitoring system.

[0063] Figure 2 A flowchart of a blade integrity monitoring method provided by an embodiment of the present invention.

[0064] like Figure 2 As shown, the blade integrity monitoring method comprises the following steps:

[0065] Step 201: Obtain pressure information of the blade through the pressure sensor.

[0066] In this embodiment, when the blade 1 is in normal operation, the chamber of the blade 1 is in a slightly positive pressure state (pressure ≤ 1kg / cm 2 ), the chamber in the blade 1 is sealed and connected to the blade root flange 8. The pressure sensor 2 has the function of continuously outputting a pressure trend curve. When the pressure in the chamber of the blade 2 fluctuates, it will be fed back in time on the pressure trend curve. The pressure trend curve will be transmitted to the blade state determination module 11 by wireless transmission through the pressure data transmission module 7, and then the wind farm centralized control center 3 obtains the pressure trend curve from the blade state determination module 11, and performs statistical output and display to assist the operation and maintenance personnel in determining the integrity of the blade.

[0067] like Figure 3 As shown, it is a pressure trend curve diagram provided by an embodiment of the present invention, through which the pressure change trend in the three blades can be obtained in real time.

[0068] Step 202: Determine the pressure state level of the blade according to the pressure information.

[0069] As a possible implementation method, specifically, the pressure difference percentage within each blade is obtained; the pressure difference level of each blade is determined according to the pressure difference percentage within the blade; the blade pressure of the blade is obtained according to the pressure difference level; and the pressure state level of the blade is determined according to the blade pressure.

[0070] In this embodiment, since the wind turbine includes three blades, the pressure states in the three blade chambers are compared to determine the pressure difference level of each blade. Here, the pressure value at a certain moment is selected from the pressure trend curve of the three blades obtained by the wind farm centralized control center 3, and the pressure difference level is determined according to the formula Determine the percentage of pressure difference within the blade. Where, P a , P b are the pressure values ​​of blade a and blade b respectively, p a-b is the pressure difference percentage between blade a and blade b. Here, a and b are any two unequal numbers from 1, 2, and 3. The pressure difference percentage within the blades can be used to preliminarily determine a group of blades that may have problems. A group of blades can be 12 groups, 13 groups, or 23 groups.

[0071] As a possible implementation manner, specifically, according to the pressure difference percentage within the blade, a blade pressure difference percentage level range is determined; according to the blade pressure difference percentage level range, a blade pressure difference level is determined.

[0072] In this embodiment, the blade pressure difference percentage level range includes four intervals, and different intervals correspond to different pressure difference levels. As shown in Table 1, it is a blade pressure difference state level information table based on blade pressure difference percentage provided by an embodiment of the present invention.

[0073] Table 1

[0074] Serial number condition Display Status 1 <![CDATA[p a-b ≤p a-b0 ]]> First level 2 <![CDATA[p a-b0 <p a-b ≤p a-b1 ]]> Second level 3 <![CDATA[p a-b1 <p a-b ≤p a-b2 ]]> Third Level 4 <![CDATA[p a-b >p a-b2 ]]> Fourth level

[0075] In Table 1, p a-b0 、p a-b1 、p a-b2 is the percentage setting value of the pressure difference within the blades. The fault degree corresponding to the pressure difference state within the blades is: first level < second level < third level < fourth level. Here, the first level indicates that the blade group is the least damaged, and the fourth level indicates that the blade group is the most damaged. Here, the percentage setting value of the pressure difference within the blades can be set according to the climatic conditions of the area where the wind turbine is installed and the production process of the blades.

[0076] In this embodiment, after the percentage of the pressure difference within the blade is determined, the percentage of the pressure difference within the blade is compared with the four intervals in Table 1 to determine the state level of the pressure difference within the blade.

[0077] As a possible implementation method, when the pressure difference state level in the blade reaches the second level or above, it indicates that cracks have appeared in the blade, either a single blade or a group of blades.

[0078] In order to determine the specific damaged blade in the failed blade group, it is also necessary to determine the stress state level of the individual blade.

[0079] As a possible implementation manner, a blade pressure level range is determined according to the blade pressure; and a blade pressure state level is determined according to the blade pressure level range.

[0080] In this embodiment, the blade pressure level range also includes four intervals, and each interval corresponds to a pressure level. As shown in Table 2, it is a blade pressure state level information table based on blade pressure provided in an embodiment of the present invention.

[0081] Table 2

[0082] Serial number condition Display Status 1 <![CDATA[p a ≤p a0 ]]> First level 2 <![CDATA[p a0 <p a ≤p a1 ]]> Second level 3 <![CDATA[p a1 <p a ≤p a2 ]]> Third Level 4 <![CDATA[p a >p a2 ]]> Fourth level

[0083] In Table 2, p a0 、p a1 、p a2 is the blade pressure setting value, and the fault degree corresponding to the blade pressure state is: first level < second level < third level < fourth level. Here, the first level indicates that the blade is the least damaged, and the fourth level indicates that the blade is the most damaged. Similarly, the blade pressure setting value can also be set according to the climatic conditions of the wind turbine installation area and the production process of the blade.

[0084] In this embodiment, after the blade pressure is determined, the blade pressure is compared with the four intervals in Table 2 to determine the pressure state level of the blade.

[0085] When it is detected that the pressure state level in a single blade chamber of the blade group reaches the second level or above, it is considered that the blade has microcracks. Then, the blade with cracks needs to be disassembled for inspection.

[0086] Step 203: Send an integrity warning prompt instruction to the alarm according to the pressure state level.

[0087] In this embodiment, in step 202, when the pressure difference state level in the blade reaches the second level or above, the wind farm centralized control center 3 will send a command to the alarm 4 for early warning to remind the operation and maintenance personnel to promptly identify the damaged blades and disassemble and repair them. After the blades are repaired and reinstalled, the pressure difference percentages in the three blades must be re-evaluated to ensure that the pressure difference percentages in the blades are all below the second level.

[0088] In this embodiment, the damage degree of the three blades as a whole is determined by the percentage of the pressure difference within the blades. Then, under the prompt of the alarm, the operation and maintenance personnel determine the damaged blade according to the pressure state of the blade and disassemble and repair it, so that the damage of the blade can be discovered in time, and at the same time, the integrity of the three blades as a whole is ensured. Here, integrity means that the percentage level of the pressure difference within the blades of the three blades and the pressure state level of a single blade are all below the second level.

[0089] As a possibility, the damage of the blade can also be judged based on the blade pressure state level alone. For example, when the blade pressure state level reaches the second level or above, although it can be known that the blade has cracks, for blades whose blade pressure state level does not reach the second level, it cannot be guaranteed that the blade will not have problems during subsequent use. Therefore, when the wind farm centralized control center sends an alarm signal, the operation and maintenance personnel need to conduct an overall assessment of the three blades, and by using the percentage level of the pressure difference within the blade, the three blades can be kept in a balanced operating state as a whole.

[0090] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "exemplary embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0094] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0095] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0096] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0097] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0098] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A blade integrity monitoring system, characterized in that: The system comprises: The blade is made of glass fiber and epoxy resin and is produced by a micro-vacuum infusion method. The blade is in a positive pressure state, and the positive pressure range is (0, 1kg / cm 2 ]; A pressure sensor, wherein the pressure sensor is mounted at a preset mounting point on the inner side wall of the blade, the preset mounting point is determined according to a position where microcracks are prone to appear in the blade, and the measuring range of the pressure sensor includes a preset pressure range; A wind farm centralized control center, the wind farm centralized control center is installed on the ground, the wind farm centralized control center is used to collect the operating parameters and fault information of the blades, the wind farm centralized control center is wirelessly connected to the pressure sensor, the data output end of the wind farm centralized control center is connected to the alarm, wherein one wind farm centralized control center can manage multiple wind turbines at the same time; A blade root flange and a hollow structure, wherein the blade root flange is sealedly connected to the hollow structure to form a closed space in the blade, wherein the hollow structure has a mesh space and can withstand the maximum pressure within the preset pressure range; The blade integrity monitoring system also includes a temperature compensation module, a pressure regulation module, a blade state determination module and a pressure data transmission module. The temperature compensation module is connected to the pressure sensor, one end of the pressure regulation module is connected to the blade root flange, and the other end of the pressure regulation module is connected to the pressure sensor. The pressure data transmission module is respectively connected to the pressure sensor, the temperature compensation module and the pressure regulation module. The blade state determination module is installed in the wind farm control center and is wirelessly connected to the temperature compensation module, the pressure regulation module and the pressure sensor through the pressure data transmission module.

2. The blade integrity monitoring system according to claim 1, further comprising an exhaust valve and an air charging valve, wherein the exhaust valve is connected to the pressure regulating module via a blade root flange; and the air charging valve is mounted on the blade root flange and communicated with the enclosed space.

3. A blade integrity monitoring method, characterized in that: The method is performed by the blade integrity monitoring system according to claim 1 or 2; Wherein, the method comprises: Acquiring pressure information of the blade through the pressure sensor; Determining the pressure state level of the blade according to the pressure information; According to the pressure state level, an integrity warning prompt instruction is sent to the alarm.

4. The blade integrity monitoring method according to claim 3, characterized in that: Determining the pressure state level of the blade according to the pressure information includes: Obtaining the intra-blade pressure difference percentage of each blade; Determining the pressure difference level of each blade according to the pressure difference percentage within the blade; According to the pressure difference level, obtaining the blade pressure of the blade; The pressure state level of the blade is determined according to the blade pressure.

5. The blade integrity monitoring method according to claim 4, characterized in that: The pressure difference level of each blade is determined according to the percentage of the pressure difference within the blade, including; Determining a blade pressure difference percentage level range according to the blade internal pressure difference percentage; The pressure difference level of the blade is determined according to the blade pressure difference percentage level range.

6. The blade integrity monitoring method according to claim 4, characterized in that: Determining the pressure state level of the blade according to the blade pressure includes: According to the blade pressure, determining a blade pressure level range; The pressure state level of the blade is determined according to the blade pressure level range.

7. The blade integrity monitoring method according to claim 4, characterized in that: If the pressure difference level is the second level, an integrity warning prompt instruction is sent to the alarm.

Images