Device for rapidly collecting web gaps before wind power blade bonding and using method

Abstract

The invention relates to a device for rapidly collecting web gaps before wind power blade bonding and a using method, and the device comprises an electrolyte bag which is made of a cylindrical plastic material, is filled with electrolyte, and is embedded with electrodes at two ends, and the electrodes are respectively connected with an electrolyte solution and an external wire, and can deform after being pressed; the top plate cushion leather and the bottom plate cushion leather are provided with bag embedding clamping grooves for fixing the electrolyte bags, the bottoms of the clamping grooves are electrically connected with the electrodes through an integrated circuit, and the clamping grooves of the top plate cushion leather and the bottom plate cushion leather are arranged in a grouping manner according to a preset interval; the sensor is electrically connected with the top plate cushion leather and the bottom plate cushion leather and is used for acquiring resistance change signals between the electrodes; the control unit is connected with the sensor and is used for amplifying, filtering and converting the electric signal; and the data acquisition computer is connected with the control unit and internally provided with data analysis software to generate web gap data reports and graphs. The device is easy and convenient to use and operate, high in automation degree and accurate in data collection, plasticine laying by personnel is reduced, and the accuracy of data measurement is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade manufacturing, and in particular to a device for quickly collecting web gaps before bonding a wind turbine blade and a method for using the device. Background Art

[0002] With the booming wind power industry, wind turbine blades, as core components of wind turbines, have a significant impact on power generation efficiency and stability. With the continuous advancement of wind power technology, large wind blades are becoming increasingly common. During blade manufacturing, the quality of the bonding between the web and the blade shell is crucial. Accurately capturing web gap data before bonding is crucial to ensuring bonding quality.

[0003] Before bonding large wind blades, traditional methods commonly involve laying out a large amount of plasticine for trial molding, then measuring the plasticine shape to obtain web clearance data. However, this method has numerous drawbacks. First, plasticine is soft and prone to irregular deformation when under pressure, resulting in large measurement errors. Furthermore, to ensure measurement accuracy, a large amount of plasticine must be laid out, which not only consumes a significant amount of manpower and time, increasing production costs, but also easily introduces further errors due to human operational differences, increasing the risk of blade quality issues.

[0004] In the prior art, there are some patented technologies for detecting the bonding gap of wind turbine blades. For example, patent CN119289827A provides a method for efficiently and accurately detecting the bonding gap of wind turbine blades. It uses materials with the ability to deform under stress and determines the qualified area by the color change of the test strip, which improves the detection efficiency to a certain extent. However, these patented technologies still have limitations. In the modular production process of large blades, most of them can only identify abnormal gap areas and cannot comprehensively and accurately collect detailed gap data. For gap fluctuation areas, it is difficult to accurately control the amount of adhesive used, which can easily cause bonding defects and affect the overall performance and service life of the blade.

[0005] In summary, the development of a device and method for collecting the gap between the front webs of wind turbine blades with simple operation, high degree of automation and accurate data collection has important practical significance for improving the manufacturing quality of wind turbine blades and reducing production costs. Summary of the Invention

[0006] The purpose of the present invention is to provide a device for quickly collecting the web gap of a wind turbine blade before bonding, and a method for quickly collecting the web gap of a wind turbine blade before bonding, so as to solve the problems existing in the prior art such as large measurement errors, high labor costs, and inability to accurately obtain gap data, so as to realize the rapid and accurate collection of the web gap data of the wind turbine blade, and improve the blade bonding quality and production efficiency.

[0007] In order to solve the above technical problems, this application provides the following technical solutions:

[0008] The present invention provides a device for quickly collecting web gaps before bonding a wind turbine blade, comprising:

[0009] The electrolyte capsule (5) is made of cylindrical plastic material, is filled with electrolyte (6), and has electrodes (4) embedded at both ends. The electrodes (4) are connected to the electrolyte solution and external wires respectively, and can be deformed when subjected to pressure;

[0010] The top plate pad (3) and the bottom plate pad (7) are both provided with a capsule embedding slot (42) for fixing the electrolyte capsule (5); the bottom of the slot is electrically connected to the electrode (4) via an integrated circuit (41); the slots of the top plate pad (3) and the bottom plate pad (7) are arranged in groups according to a preset spacing;

[0011] The sensor (1) is electrically connected to the top plate pad (3) and the bottom plate pad (7) and is used to collect resistance change signals between the electrodes (4);

[0012] a control unit (8), connected to the sensor (1), for amplifying, filtering and converting the electrical signal;

[0013] The data acquisition computer (9) is connected to the control unit (8) and has built-in data analysis software to generate web gap data reports and graphics.

[0014] A method for collecting gaps between webs of wind turbine blades, comprising the following steps:

[0015] 1) Preparation step: Lay the device on the main beam area (15) of the wind turbine blade SS surface, and obtain initial resistance data after calibration;

[0016] 2) Pressure application step: applying pressure to the web (18) through a blade flipper, causing the electrolyte capsule (5) to be deformed under pressure, and the distance between the electrodes (4) to change, resulting in a change in resistance;

[0017] 3) Data acquisition step: the sensor (1) acquires the resistance signal in real time, which is filtered, amplified and converted into analog to digital by the control unit (8) and then transmitted to the data acquisition computer (9);

[0018] 4) Data generation step: The data analysis software converts the resistance data into gap values, generates gap distribution cloud maps and reports, and triggers an alarm when the gap is ≥5mm;

[0019] 5) Device recovery step: release the blade lock, recover the device after the electrolyte capsule (5) rebounds, and check for damage to the electrolyte capsule, deformation of the pad skin, and circuit connection status.

[0020] Among them, the preferred ones are:

[0021] The cylindrical diameter, initial height and compressed height of the electrolyte capsule (5) are 10 mm, 25 mm and 2 mm respectively.

[0022] The electrolyte capsule (2) may be made of polyurethane. The electrolyte capsule (2) may be made of polyurethane.

[0023] The slots of the top plate pad (3) and the bottom plate pad (7) are arranged in groups of 4, with an intra-group spacing of 10 mm, an axial group spacing of 50 mm, and a chordal group spacing of 20 mm.

[0024] The plastic shell of the electrolyte capsule (5) is flexible and conductive, and can stably transmit electrical signals when deformed by pressure.

[0025] The plastic material hardness of the top plate pad (3) and the bottom plate pad (7) is greater than or equal to Shore hardness 80A, and a wear-resistant coating is provided on the surface.

[0026] The sensor (1) is a high-precision resistance sensor with a resolution of ≤0.1Ω and a sampling frequency of ≥100Hz, and is capable of accurately collecting minute changes in the resistance between the electrodes of the electrolyte capsule.

[0027] The control unit (8) comprises a signal amplifier and an analog-to-digital converter, the signal amplification factor is ≥1000 times, and the analog-to-digital conversion accuracy is ≥16 bits.

[0028] Before the preparation step, the device is calibrated and initialized, and initial data of the device is obtained through a data acquisition computer.

[0029] During the pressure application step, the blade flipping speed is 0.5° / s and the locking torque is 450N·m. During the data generation step, the data analysis software monitors and issues warnings on the generated web gap data in real time, and issues an alarm when the gap data exceeds a preset range.

[0030] The original signal is processed using a moving average filtering algorithm (window width 5). In the data acquisition step, the control unit filters the collected signal to remove interference signals and improve data accuracy.

[0031] Compared with the prior art, the device and method for quickly collecting the gap between the webs of wind turbine blades before bonding in the present invention have at least the following beneficial effects:

[0032] 1. High measurement accuracy: By adopting the principle that the resistance of the electrolyte capsule changes when it is compressed and deformed, combined with high-precision sensors and advanced data analysis software, it can accurately collect web gap data, effectively avoiding the errors of traditional plasticine measurement methods, greatly improving measurement accuracy, providing reliable data support for blade bonding, and helping to improve blade bonding quality.

[0033] 2. High degree of automation: The entire data collection process is automated, from sensor signal acquisition to data acquisition computer generation of gap data reports and graphics, without the need for a large amount of manual intervention, reducing the impact of human factors on measurement results, while improving work efficiency and reducing labor costs.

[0034] 3. Easy to operate: The device has a simple structure and is easy to install and use. The operator only needs to lay the device in the designated position and start the blade flipper to apply pressure to complete data collection. There is no need for complicated operation procedures, which reduces the operator's skill requirements.

[0035] 4. Comprehensive data collection: Unlike the existing methods that can only identify abnormal gap areas, the present invention can comprehensively collect detailed gap data, including data on gap fluctuation areas, providing a basis for precise control of adhesive dosage, effectively reducing the occurrence of bonding defects, and improving the overall quality and reliability of the blade.

[0036] 5. Reusable: After completing a measurement, the device can be recycled and reused after inspection and maintenance, which reduces production costs and meets the requirements of sustainable development.

[0037] The following further describes the device for quickly collecting the gap between the webs of wind turbine blades before bonding and the method for using the device according to the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a layout diagram and a partial enlarged diagram of a device for quickly collecting web gaps before bonding a wind turbine blade according to the present invention;

[0039] Figure 2 This is a data transmission line arrangement diagram of a device for quickly collecting web gaps before bonding a wind turbine blade according to the present invention;

[0040] Figure 3 This is a schematic diagram of the electrolyte capsule structure of a device for quickly collecting web gaps before bonding a wind turbine blade according to the present invention;

[0041] Figure 4 This is a schematic diagram of the top plate / bottom plate pad structure of a device for quickly collecting web gaps before bonding a wind turbine blade according to the present invention.

[0042] 1 sensor, 2 sensing circuit, 3 top plate gasket, 4 electrode, 5 electrolyte capsule, 6 electrolyte, 7 bottom plate gasket, 8 control unit, 9 data acquisition computer; 41 integrated circuit, 42 capsule slot; 11 windward shell, 12 web-web gap, 13 gap measuring device, 14 leeward shell, 15 leeward main beam, 16 unpressurized area electrolyte capsule, 17 pressurized area electrolyte capsule, 18 web. DETAILED DESCRIPTION

[0043] like Figure 1-4 As shown, the present invention provides a device for quickly collecting the web gap before bonding a wind turbine blade, which mainly comprises: 5 electrolyte capsules, 3 top plate pads and 7 bottom plate pads, 1 sensor, 8 control units, and 9 data acquisition computers.

[0044] 1) See Figures 2 to 3 The electrolyte capsule 5 is a cylindrical plastic material filled with electrolyte 6. Electrodes 4 are embedded at both ends of the cylinder. Electrode 4 is connected to the electrolyte solution inside and to the wire outside. In this specific embodiment, the electrolyte capsule 5 has a cylindrical diameter of 10 mm and a height of 25 mm. It can be compressed to a height of 2 mm when under pressure.

[0045] 2) The top and bottom plate gaskets 3 and 7 are made of plastic and feature capsule slots 42 for securing the electrolyte capsules 5. The bottoms of these slots are connected to integrated circuits 41, which connect to the electrodes 4 of the electrolyte capsules 5 and output electrical signals. In this embodiment, the top and bottom plate gaskets 3 and 7 are arranged in groups of four capsule slots 42, with 10 mm spacing within each group. The axial spacing within each group is 50 mm, and the chordal spacing is 20 mm, to prevent the capsules from rupturing under pressure.

[0046] 3) See also Figure 1 After the top plate gasket 3, electrolyte capsule 5, bottom plate gasket 7, and sensor 1 are assembled and connected, data acquisition computer 9 collects data to obtain initial data. After the blade web 18 is bonded to the PS surface shell (i.e., the windward surface shell 11), the gap measurement device 13 is placed in the SS surface main beam area (i.e., the area where the leeward main beam 15 is located). The blade flipper causes the web 18 to press against the gap measurement device 13. The spacing between the electrodes 4 of the electrolyte capsule 5 within the device changes according to the pressure and remains stable after the blade is locked. At this time, the data acquisition computer 9 outputs the resistance between the electrodes 4 of each capsule through the sensor 1, which is converted into web-to-web gap 12 data.

[0047] in:

[0048] Electrolyte capsule 5: Made of cylindrical plastic material, filled with electrolyte 6, with electrodes 4 embedded at both ends. Metal electrodes are embedded at both ends of the cylinder, which are connected to the electrolyte solution inside and connected to wires outside. This structural design causes the distribution of electrolyte inside the electrolyte capsule 5 to change when it is under pressure, thereby causing a change in the resistance between the electrodes. The cylindrical diameter of the electrolyte capsule 5 can be set to 10mm and the height to 25mm. It can be compressed to 2mm high after being compressed. This size design can not only ensure the effective measurement of resistance changes in a smaller space, but also produce obvious resistance changes within a certain pressure range, ensuring significant resistance changes in the blade gap and improving the measurement sensitivity.

[0049] The top plate pad 3 and the bottom plate pad 7: The electrolyte capsule 5 is fixed through the capsule slot 42, and the bottom integrated circuit 41 is connected to the electrode 4 to output the electrical signal. They are all made of plastic material, and are provided with a capsule slot inside for embedding and fixing the electrolyte capsule. The bottom of the slot is connected to the pad integrated circuit, which is used to connect with the electrolyte capsule electrode to achieve stable output of the electrical signal. The top plate and bottom plate pads are arranged in groups of 4 slots, and the spacing within the group is set to 10 mm. Such a spacing can not only ensure the tightness of the electrolyte capsule installation, but also avoid mutual interference. The spacing between each group is 50 mm in the axial direction and 20 mm in the chord direction. This reasonable spacing setting ensures that the electrolyte capsule will not rupture due to mutual squeezing when under pressure, and at the same time ensures that data can be collected evenly at different positions of the blade.

[0050] Sensor 1: A high-precision resistance sensor connected to integrated circuit 41 on top and bottom plate pads 3 and 7, capturing resistance changes in the electrolyte capsule 5 in real time. This high-precision sensor can detect minute resistance changes, ensuring the accuracy of the collected data.

[0051] Control unit 8: Connected to the sensor, this unit includes a signal amplifier and a signal converter. The signal converter converts the amplified electrical signal into a digital signal suitable for processing by the data acquisition computer, enabling efficient signal transmission and processing. It amplifies the weak electrical signal collected by sensor 1 and converts it into a digital signal, which is then transmitted to data acquisition computer 9.

[0052] Data acquisition computer 9: Connected to the control unit, it receives the processed signals. The data acquisition computer is equipped with specialized data analysis software that rapidly processes and analyzes the collected resistance data, converting the resistance signals into web-to-web gap data. The software then generates reports and graphs (such as gap distribution cloud maps) to facilitate operators' intuitive understanding of web gap conditions. This software supports real-time monitoring and early warning capabilities.

[0053] The present invention is based on the characteristics of the wind turbine blade mold bonding method. Its working process is as follows: after the web 18 is bonded to the windward shell 11, the gap measuring device 13 is laid on the leeward main beam 15 area (SS surface). The blade flipper is started to press the web 18 toward the device, and the electrolyte capsule 5 is deformed by pressure (such as Figure 1 The pressured area is shown as electrolyte capsule 17, while the unpressured area is shown as electrolyte capsule 16. The change in the distance between electrodes 4 causes a change in resistance. Sensor 1 collects signals, which are processed by control unit 8. Data acquisition computer 9 then outputs data on the web-to-web gap 12, providing accurate information for the bonding process.

[0054] The device is easy to use and operate, has a high degree of automation, collects data accurately, reduces the number of people laying plasticine, ensures the accuracy of data measurement, and is of great benefit to improving the quality and efficiency of blades.

[0055] Implementation steps:

[0056] 1. Preparation step: Lay the gap measurement device 13 on the leeward main beam 15 area (SS surface), calibrate the device and obtain initial data through the data acquisition computer 9. Provide a benchmark for subsequent measurements.

[0057] 2. Pressure Application Step: The blade flipper squeezes the web 18 against the device, causing the electrolyte capsule 5 to deform under pressure and the electrodes 4 to shift, changing their resistance. Under pressure, the electrolyte capsule inside the device deforms, causing the upper and lower electrodes to shift, thus changing the resistance between the two electrodes. As pressure increases, the electrolyte capsule becomes more compressed, and the resistance change between the electrodes increases accordingly. This resistance change correlates with the pressure and the gap between the webs.

[0058] 3. Data acquisition step: After the blades are locked, the sensor 1 collects the resistance signal in real time, which is filtered, amplified and converted by the control unit 8 and then transmitted to the data acquisition computer 9.

[0059] The control unit removes clutter signals caused by external interference and improves data accuracy.

[0060] 4. Data generation steps: The data analysis software converts the resistance data into web gap 12 data, generates reports and graphs, and the over-limit data triggers an alarm.

[0061] The data acquisition computer receives the digital signals from the control unit and performs calculations and analysis using built-in data analysis software. Based on a preset algorithm, the software converts the resistance data into web gap data and generates detailed reports and intuitive graphs, such as gap distribution curves. Simultaneously, the data analysis software monitors the generated web gap data in real time. When the gap data exceeds the preset range, an alarm is immediately issued, allowing operators to take timely action. Data processing can include moving average filtering (window 5) and defect warning algorithms (five consecutive data points > 5mm trigger an alarm).

[0062] 5. Device recovery steps: Release the blade lock, recover the device after rebounding, check the electrolyte capsule 5, top plate pad 3, bottom plate pad 7, sensor 1 and circuit connection, and reuse it after maintenance.

[0063] After releasing the blade lock and flipping it open, the electrolyte capsule rebounds to its original shape. The device is then recovered and inspected and maintained, including checking for damage to the electrolyte capsule, deformation of the pad assembly, and proper sensor and circuit connections, to ensure it can be used again.

[0064] The following is a detailed description with reference to a specific embodiment and a comparative embodiment.

[0065] Example 1:

[0066] 1. Device installation and preparation: At a large-scale wind turbine blade production base, a wind turbine blade that is about to undergo the web and shell bonding process is selected. This blade is a large offshore wind turbine blade with a length of 80 meters, and the accuracy of the web gap is extremely high. First, check whether the various components of the wind turbine blade web gap acquisition device described in the present invention are intact. After confirming that they are correct, carefully lay the device in the SS surface main beam area. During the laying process, adjust the position of the device in strict accordance with the design requirements to ensure that the electrolyte capsule, top plate / bottom plate pads and other components are placed correctly and that the connections between the components are tight. After the laying is completed, the device is calibrated and initialized through the data acquisition computer to obtain the initial data of the device to provide a benchmark for subsequent measurements.

[0067] 2. Data acquisition process: Start the blade flipper and apply pressure to the web at a constant speed. As the pressure gradually increases, the electrolyte capsule inside the device begins to deform, and the upper and lower electrodes are displaced, causing the resistance between the electrodes to change. High-precision sensors capture these resistance change signals in real time and transmit them to the control unit. After receiving the signal, the control unit first filters the signal to remove external interference signals, then amplifies the weak electrical signal through a signal amplifier, and then converts it into a digital signal through a signal converter and sends it to the data acquisition computer. The data analysis software in the data acquisition computer quickly processes the received digital signal, converts the resistance data into web gap data according to the preset algorithm, and generates detailed reports and intuitive gap distribution graphs.

[0068] 3. Data processing and analysis: View the generated web gap data reports and graphs through the display screen of the data acquisition computer. The report clearly lists the web gap values at different locations, accurate to 0.1 mm. From the gap distribution graph, it can be intuitively seen that the web gap in the front section of the blade is relatively uniform, most of which is between 2-3 mm; while there is an area in the middle section of the blade with a slightly larger gap, reaching 4 mm. Based on these data, it can be judged that the area with a slightly larger gap may affect the bonding quality and needs to be adjusted before bonding. At this time, the subsequent process should be suspended and the web in this area should be fine-tuned to restore the gap to a reasonable range.

[0069] 4. Device Recovery and Maintenance: After completing data collection and blade adjustment, the blade locks were released and flipped open, allowing the electrolyte capsule to spring back into place. The device was carefully recovered and thoroughly inspected and maintained. Inspection revealed minor wear on some of the electrolyte capsules during the compression process, but this did not affect normal operation. The worn areas were marked for further inspection. The pad assembly, sensors, and electrical connections were also inspected to ensure proper function. After maintenance, the device was stored securely for future use.

[0070] The top plate pad (3) and the bottom plate pad (7) are made of polycarbonate, with a wear-resistant coating (Shore hardness 80A) sprayed on the surface; the signal processing circuit includes a strain gauge resistance sensor (1) and an embedded ARM processor (STM32F407); the control unit (8) is connected to a data acquisition terminal via a CAN bus (5). The resistance signal is converted into a gap value using the formula G=k·ln(R / R0)+b, where k / b is a calibration coefficient.

[0071] Example 2 (comparative test)

[0072] 1. Test plan: To further verify the advantages of the device of the present invention, a comparative test was conducted on the same batch of wind turbine blades. Two wind turbine blades with the same specifications were selected. One blade was used to collect web clearance data using the device of the present invention, and the other blade was measured using the traditional plasticine method. On the blades using the device of the present invention, data collection was performed according to the operating steps of the above-mentioned embodiment 1. For the blades measured using plasticine, a large amount of plasticine was placed according to the traditional method for trial molding, and then the shape of the plasticine was carefully measured to obtain the web clearance data.

[0073] 2. Analysis of test results: By comparing the data collected by the two methods, it was found that the data collected using the device of the present invention has significantly higher accuracy. The error of the data collected by the device of the present invention is controlled within ±0.2 mm, while the error of the traditional clay measurement method is as high as ±1 mm. In terms of data acquisition efficiency, it only takes 30 minutes to complete the web gap data collection of a blade using the device of the present invention, including device installation, data collection and processing; while the traditional clay measurement method takes 2-3 hours and has a large manpower investment. In addition, in the subsequent blade bonding process, the blade whose data was collected using the device of the present invention had good bonding quality and no obvious bonding defects; while the blade whose data was measured using clay was found to have multiple areas of weak bonding after bonding, which required rework.

[0074] The above specific embodiments can fully prove that the device and method for quickly collecting web gaps before bonding wind turbine blades of the present invention have significant advantages in practical applications, can effectively improve the accuracy and efficiency of web gap data collection during wind turbine blade manufacturing, improve blade bonding quality, reduce production costs, and have broad application prospects.

[0075] It should be noted that in step 2), the materials of the top and bottom plates are not specifically limited, and other materials with similar performance can be used to replace them to achieve the present invention. The use of the electrolyte capsule is a preferred embodiment of the present invention, and other similar products can also be used as substitutes. For example, the electrolyte capsule (2) can be replaced with silicone rubber, which has an applicable temperature range of 60°C to 120°C; and the top plate pad (3) can be replaced with glass fiber reinforced epoxy resin (FRP), which can reduce weight by 30%.

[0076] This invention addresses the unique characteristics of conventional wind turbine blade test mold data measurement. By attaching an electrolyte capsule to the blade surface, the pressure from the web causes the internal electrolyte capsule to deform, displacing the electrodes on the upper and lower sides of the capsule. This changes the resistance between the two electrodes and outputs it to a controller. The signal is then converted and output to a control unit, where it is collected by a computer to generate gap data. This significantly reduces measurement errors, lowers labor costs, and shortens the blade molding cycle.

[0077] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A device for quickly collecting web gaps before bonding a wind turbine blade, characterized in that: include: The electrolyte capsule (5) is made of cylindrical plastic material, is filled with electrolyte (6), and has electrodes (4) embedded at both ends. The electrodes (4) are connected to the electrolyte solution and external wires respectively, and can be deformed when subjected to pressure; The top plate pad (3) and the bottom plate pad (7) are both provided with a capsule embedding slot (42) for fixing the electrolyte capsule (5); the bottom of the slot is electrically connected to the electrode (4) via an integrated circuit (41); the slots of the top plate pad (3) and the bottom plate pad (7) are arranged in groups according to a preset spacing; The sensor (1) is electrically connected to the top plate pad (3) and the bottom plate pad (7) and is used to collect resistance change signals between the electrodes (4); a control unit (8), connected to the sensor (1), for amplifying, filtering and converting the electrical signal; The data acquisition computer (9) is connected to the control unit (8) and has built-in data analysis software to generate web gap data reports and graphics.

2. The device according to claim 1, characterized in that The cylindrical diameter, initial height and compressed height of the electrolyte capsule (5) are 10 mm, 25 mm and 2 mm respectively.

3. The device according to claim 1, characterized in that The slots of the top plate pad (3) and the bottom plate pad (7) are arranged in groups of 4, with an intra-group spacing of 10 mm, an axial group spacing of 50 mm, and a chordal group spacing of 20 mm.

4. The device according to claim 1, characterized in that The plastic shell of the electrolyte capsule (5) is flexible and conductive, and can stably transmit electrical signals when deformed by pressure.

5. The device according to claim 1, characterized in that The plastic material hardness of the top plate pad (3) and the bottom plate pad (7) is greater than or equal to Shore hardness 80A, and a wear-resistant coating is provided on the surface.

6. The device according to claim 1, characterized in that The sensor (1) is a high-precision resistance sensor with a resolution of ≤0.1Ω and a sampling frequency of ≥100Hz.

7. The device according to claim 1, characterized in that The control unit (8) comprises a signal amplifier and an analog-to-digital converter, the signal amplification factor is ≥1000 times, and the analog-to-digital conversion accuracy is ≥16 bits.

8. A method for collecting gaps between webs of wind turbine blades based on the device according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) Preparation step: Lay the device on the main beam area (15) of the wind turbine blade SS surface, and obtain initial resistance data after calibration; 2) Pressure application step: applying pressure to the web (18) through a blade flipper, causing the electrolyte capsule (5) to be deformed under pressure, and the distance between the electrodes (4) to change, resulting in a change in resistance; 3) Data acquisition step: the sensor (1) acquires the resistance signal in real time, which is filtered, amplified and converted into analog to digital by the control unit (8) and then transmitted to the data acquisition computer (9); 4) Data generation step: The data analysis software converts the resistance data into gap values, generates gap distribution cloud maps and reports, and triggers an alarm when the gap is ≥5mm; 5) Device recovery step: release the blade lock, recover the device after the electrolyte capsule (5) rebounds, and check for damage to the electrolyte capsule, deformation of the pad skin, and circuit connection status.

9. The method according to claim 8, characterized in that In the pressure application step, the blade flipping speed is 0.5° / s and the locking torque is 450 N·m.

10. The method according to claim 8, characterized in that In the data acquisition step, a moving average filtering algorithm is used to process the original signal.

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