A fan blade mold closing surface state monitoring method, system, device and medium

Abstract

The application discloses a kind of fan blade die face state monitoring method, system, device and medium, it is related to wind power technology field, to timely monitor the state of fan blade die face, lay ladder resistance network on die face, and ladder resistance network is made of several resistors, if the state of fan blade die face is normal, all resistors in current ladder resistance network are parallel, so as to monitor whether the state of fan blade die face is normal, the current total resistance value of current parallel resistor in each resistor needs to be determined, and whether the state of fan blade die face is normal is judged by judging whether current total resistance value after parallel satisfies preset condition, the state of fan blade die face can be timely and accurately judged by measuring the current total resistance value of current parallel resistor in each resistor on ladder resistance network, realizes the real-time monitoring of the state of fan blade die face.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, and in particular to a method, system, device and medium for monitoring the condition of the molded surface of wind turbine blades. Background Technology

[0002] Currently, my country's installed capacity of renewable energy has surpassed that of coal-fired power generation. Among these, wind power, as a crucial development direction for new energy power construction, has seen its installed capacity and unit capacity continuously increase. Wind turbine generators convert wind energy into mechanical energy through massive rotors, with the turbine blades playing a vital role in this process.

[0003] Wind turbine blades are subjected to centrifugal force during rotation and are exposed to the natural environment for extended periods, resulting in a high probability of damage. If damage to wind turbine blades is not addressed promptly and the damage continues to escalate, it can damage the tower, transmission components, and other parts of the wind turbine unit. In severe cases, it can even lead to major accidents such as wind turbine fires or tower collapses. Therefore, early monitoring of wind turbine blade damage is one of the crucial means to ensure the safe operation of wind turbine units.

[0004] A summary and analysis of wind turbine blade damage accidents in recent years revealed that cracking of the molded surface of wind turbine blades is one of the main manifestations of wind turbine blade damage. However, there is no existing technology that can accurately monitor the cracking of the molded surface of wind turbine blades, i.e., the condition of the molded surface of wind turbine blades. Summary of the Invention

[0005] The purpose of this invention is to provide a method, system, device and medium for monitoring the state of the wind turbine blade mating surface. This solution can make timely and accurate judgments on the state of the wind turbine blade mating surface by measuring the current total resistance value of the resistors currently connected in parallel in each resistor of the ladder-shaped resistor network, thus realizing real-time monitoring of the state of the wind turbine blade mating surface.

[0006] To solve the above technical problems, the present invention provides a method for monitoring the condition of the molded surface of a wind turbine blade, applied to the processor of a wind turbine blade molded surface condition monitoring device. The wind turbine blade molded surface condition monitoring device further includes: a ladder-shaped resistor network comprising a plurality of resistors laid on the molded surface of the wind turbine blade, wherein the resistors are connected in parallel with each other; the method includes:

[0007] Determine the current total resistance of the resistors currently connected in parallel among the aforementioned resistors;

[0008] Determine whether the current total resistance value meets the preset conditions;

[0009] If the current total resistance value meets the preset conditions, then the state of the mold parting surface is determined to be normal.

[0010] If the current total resistance does not meet the preset conditions, the state of the mold parting surface is determined to be abnormal.

[0011] Optionally, before determining the current total resistance of the resistors currently connected in parallel among the resistors, the method further includes:

[0012] Determine the length of the mold parting surface;

[0013] The standard number of each resistor is determined based on the length and the correspondence between the length of the mold surface and the number of resistors;

[0014] Determine the resistance value corresponding to each of the resistors;

[0015] The standard total resistance value after the resistors are connected in parallel is determined based on the number of standards and the resistance value corresponding to each resistor.

[0016] The preset conditions are determined based on the standard total resistance value.

[0017] Optionally, determining the current total resistance value of the resistors currently connected in parallel among the resistors includes:

[0018] Determine the number of resistors currently connected in parallel among the aforementioned resistors;

[0019] Determine the resistance value corresponding to each of the resistors currently connected in parallel;

[0020] The current total resistance of the resistors currently connected in parallel is determined based on the number of resistors currently connected in parallel in each resistor and the resistance values ​​corresponding to the resistors currently connected in parallel in each resistor.

[0021] Optionally, the wind turbine blade mold surface status monitoring device further includes: a display screen; and after determining the current total resistance value of the resistors currently connected in parallel among the resistors, it further includes:

[0022] Control the display screen to display the current total resistance value.

[0023] Optionally, determining the preset conditions based on the standard total resistance includes:

[0024] Determine the normal resistance range based on the aforementioned standard total resistance value;

[0025] The normal resistance range is used as the preset condition;

[0026] Accordingly, determining whether the current total resistance value meets the preset conditions includes:

[0027] Determine whether the current total resistance value is within the normal resistance range;

[0028] If the current total resistance value is within the normal resistance value range, then the current total resistance value is determined to meet the preset condition;

[0029] If the current total resistance value is not within the normal resistance value range, then the current total resistance value is determined to not meet the preset conditions.

[0030] Optionally, after stating that the current total resistance value is not within the normal resistance value range, the method further includes:

[0031] The warning range is determined based on the aforementioned standard total resistance value;

[0032] Determine whether the current total resistance value is within the warning range, where the warning range includes the normal resistance value range;

[0033] If the current total resistance value is within the warning range, then the current total resistance value is determined not to meet the warning conditions.

[0034] If the current total resistance value is not within the warning range, then the current total resistance value is determined to meet the warning condition.

[0035] Optionally, after stating that the current total resistance value is not within the warning range, the method further includes:

[0036] The alarm range is determined based on the standard total resistance value;

[0037] Determine whether the current total resistance value is within the alarm range, where the alarm range includes the warning range;

[0038] If the current total resistance value is within the alarm range, then the current total resistance value is determined not to meet the alarm conditions.

[0039] If the current total resistance value is not within the alarm range, then the current total resistance value is determined to meet the alarm conditions.

[0040] To address the aforementioned technical problems, this invention also provides a wind turbine blade mating surface condition monitoring system, applied to a processor of a wind turbine blade mating surface condition monitoring device. The wind turbine blade mating surface condition monitoring device further includes: a ladder-shaped resistor network comprising several resistors laid on the mating surface of the wind turbine blade, wherein each resistor is connected in parallel. The system includes:

[0041] A determining unit is used to determine the current total resistance value of the resistors currently connected in parallel among the resistors;

[0042] The judgment unit is used to determine whether the current total resistance value meets the preset conditions;

[0043] The first determination unit is used to determine that the state of the mold parting surface is normal when the current total resistance value meets the preset conditions.

[0044] The second determination unit is used to determine that the state of the mold parting surface is abnormal when the current total resistance value does not meet the preset conditions.

[0045] To address the aforementioned technical problems, the present invention also provides a device for monitoring the condition of the molded surface of a wind turbine blade, comprising:

[0046] A ladder-shaped resistor network comprising several resistors is laid on the mating surface of the wind turbine blades, and the resistors are connected in parallel with each other;

[0047] A processor, connected to the ladder-shaped resistor network, is used to execute a computer program to implement the steps of the wind turbine blade mold surface condition monitoring method as described above.

[0048] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the steps of the wind turbine blade mold surface state monitoring method described above.

[0049] The purpose of this invention is to provide a method, system, device, and medium for monitoring the state of the wind turbine blade's molded surface. To monitor the state of the wind turbine blade's molded surface in a timely manner, a ladder-shaped resistor network is laid on the molded surface. This ladder-shaped resistor network consists of several resistors. If the state of the wind turbine blade's molded surface is normal, all resistors in the current ladder-shaped resistor network are connected in parallel. Therefore, to monitor whether the state of the wind turbine blade's molded surface is normal, it is necessary to determine the current total resistance value of the resistors currently connected in parallel. The state of the wind turbine blade's molded surface is then judged by whether the current total resistance value meets a preset condition. This solution can timely and accurately judge the state of the wind turbine blade's molded surface by measuring the current total resistance value of the resistors currently connected in parallel in the ladder-shaped resistor network, thus achieving real-time monitoring of the state of the wind turbine blade's molded surface. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 A process flow diagram of a method for monitoring the condition of the molded surface of a wind turbine blade provided by the present invention;

[0052] Figure 2 This is a schematic diagram of the monitoring system provided by the present invention;

[0053] Figure 3This is a schematic diagram of the structure of a wind turbine blade mold surface condition monitoring system provided by the present invention. Detailed Implementation

[0054] The core of this invention is to provide a method, system, device and medium for monitoring the state of the wind turbine blade mating surface. This solution can make timely and accurate judgments on the state of the wind turbine blade mating surface by measuring the current total resistance value of the resistors currently connected in parallel in each resistor of the ladder resistor network, thus realizing real-time monitoring of the state of the wind turbine blade mating surface.

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Please refer to Figure 1 , Figure 1 This invention provides a process flowchart for a method to monitor the condition of a wind turbine blade's molded surface. The processor of the wind turbine blade molded surface condition monitoring device further includes: a ladder-shaped resistor network comprising several resistors laid on the molded surface of the wind turbine blade, with each resistor connected in parallel. The method includes:

[0057] S11: Determine the current total resistance of the resistors currently connected in parallel among all resistors;

[0058] S12: Determine whether the current total resistance value meets the preset conditions;

[0059] S13: If the current total resistance meets the preset conditions, the state of the mold parting surface is determined to be normal.

[0060] S14: If the current total resistance does not meet the preset conditions, the state of the mold parting surface is determined to be abnormal.

[0061] In this invention, to monitor the cracking status of the molded surface of a wind turbine blade, a ladder-shaped resistor network comprising several resistors is installed on the molded surface of the wind turbine blade. The resistors on the ladder-shaped resistor network are connected in parallel. If the molded surface cracks or is in an abnormal state, the number of resistors connected in parallel will change, meaning the total resistance of the currently connected resistors will change. Therefore, by first determining the total resistance of the currently connected resistors in parallel, and then judging whether the total resistance meets a preset condition, the state of the molded surface can be determined. If the total resistance meets the preset condition, it proves that the molded surface is in a normal state, i.e., it is not cracked; if the total resistance does not meet the preset condition, it proves that the molded surface is in an abnormal state, i.e., it is cracked. By measuring the total resistance of the currently connected resistors in parallel on the ladder-shaped resistor network, the state of the wind turbine blade molded surface can be judged in a timely and accurate manner, achieving real-time monitoring of the state of the wind turbine blade molded surface.

[0062] It should be noted that the wind turbine blade mold surface condition monitoring device also includes: a resistance monitoring device and a signal conversion box. The ladder-shaped resistor network consists of metal laying wires, metal film resistors, and resistance connecting wires. The two ends of the metal film resistors are connected to the metal laying wires through the resistance connecting wires, and the connection method is resistance spot welding. Two adjacent metal film resistors are parallel to each other and equidistant. When the ladder-shaped resistor network is laid, it spans across the mold surface. A thin layer of insulating resin is manually coated on the surface of the ladder-shaped resistor network.

[0063] It should also be noted that, to increase the accuracy of the alarm, the resistance values ​​of all the metal film resistors forming the ladder-shaped resistor network are consistent, and the resistance of a single metal film resistor is 100 times the number of metal film resistors. The number of metal film resistors can vary depending on the blade length, meaning that this monitoring device can adapt to blades of different lengths and different monitoring requirements. The ladder-shaped resistor network is installed inside the wind turbine blades, and its length and the number of metal film resistors can be adjusted according to the blade length and monitoring needs, exhibiting excellent engineering adaptability, economy, and monitoring reliability.

[0064] It should also be noted that the ladder-shaped resistor network has two metal laying wires, the diameter of which is larger than that of the resistance connection wire. During installation, the two metal laying wires are laid on the blade shells on both sides of the mold mating surface. One end of the ladder-shaped resistor network is connected to a resistance measuring device, which is powered by an independent power supply. This power supply is connected to a separate small UPS (Uninterruptible Power Supply) device in the wind turbine pitch control cabinet to ensure stable power supply.

[0065] It should also be noted that the wind turbine blade mold surface status monitoring device involved in this invention can control the resistance measuring device. The main control parameters include measurement time and measurement frequency, so as to realize uninterrupted and timed resistance measurement alarm of the measuring device and transmit the measured value to the signal conversion box. At the same time, the resistance measuring device is equipped with a resistance display, which can display the resistance measurement value in real time.

[0066] It should also be noted that the monitoring method provided by the present invention can also be as follows: Step 1: Lay the ladder-shaped resistor network involved in the wind turbine blade mold surface condition monitoring device provided by the present invention on the mold surface part inside the wind turbine blade. After the laying is completed, manually coat a thin layer of insulating resin on the metal laying line of the ladder-shaped resistor network.

[0067] Step 2: Insulate and protect the end of the ladder-shaped resistor network near the tip of the wind turbine blades, and extend the end near the hub to the vicinity of the blade root, with a flexible wire that has sufficient slack to connect to the hub.

[0068] Step 3: The resistance measuring device is fixed on the pitch control cabinet bracket and connected to the resistance measuring device by a flexible wire.

[0069] Step 4: Connect the resistance measuring device to the resistance monitoring and control device, and connect the control device to the electrical signal conversion device, i.e., the signal conversion box;

[0070] Step 5: The converted measured electrical signal is connected to the monitoring PLC (Programmable Logic Controller) in the wind turbine pitch control cabinet. Simultaneously, a resistance change alarm is set. The signal is also synchronized from the wind turbine pitch control cabinet to the main wind turbine control cabinet, and further transmitted to the site's centralized control center (remote control center) for remote alarm monitoring. The overall monitoring system structure is as follows: Figure 2 As shown.

[0071] Step 6: In the alarm response logic, set the normal resistance range, upper and lower warning values, and upper and lower alarm values. The normal resistance range is based on the total resistance of the ladder resistor network, with the upper limit slightly less than the total resistance of the ladder resistor network when one metal film resistor is removed, and the lower limit being the total resistance of the ladder resistor network when one metal film resistor is added. The warning value is based on the total resistance of the ladder resistor network, with the upper limit being the total resistance of the ladder resistor network when two metal film resistors are removed, and the lower limit being the upper limit of the normal resistance range of the ladder resistor network. The alarm value is based on the total resistance of the ladder resistor network, with the upper limit being the resistance value of a single resistor in the ladder resistor network, and the lower limit being the upper limit of the warning value of the ladder resistor network. This invention sets the lower limit to prioritize response.

[0072] The purpose of this embodiment is to provide a method for monitoring the state of the wind turbine blade's molded surface. In order to monitor the state of the wind turbine blade's molded surface in a timely manner, a ladder-shaped resistor network is laid on the molded surface, and the ladder-shaped resistor network is composed of several resistors. If the state of the wind turbine blade's molded surface is normal, all resistors in the current ladder-shaped resistor network are connected in parallel. Therefore, in order to monitor whether the state of the wind turbine blade's molded surface is normal, it is necessary to determine the current total resistance value of the resistors currently connected in parallel among the resistors, and to determine whether the state of the wind turbine blade's molded surface is normal by judging whether the current total resistance value after parallel connection meets the preset conditions. This solution can make timely and accurate judgments on the state of the wind turbine blade's molded surface by measuring the current total resistance value of the resistors currently connected in parallel among the resistors in the ladder-shaped resistor network, thus realizing real-time monitoring of the state of the wind turbine blade's molded surface.

[0073] Based on the above embodiments:

[0074] As an optional embodiment, before determining the current total resistance of the resistors currently connected in parallel among the resistors, the method further includes:

[0075] Determine the length of the mold parting surface;

[0076] The standard number of each resistor is determined based on the correspondence between the length and the length of the mold parting surface and the number of resistors;

[0077] Determine the resistance value of each resistor;

[0078] The standard total resistance value after the resistors are connected in parallel is determined based on the number of standard resistors and the resistance value of each resistor.

[0079] Preset conditions are determined based on the standard total resistance value.

[0080] In this invention, before determining the current total resistance value of the resistors currently connected in parallel, preset conditions are determined. The method for determining these conditions is as follows: first, the length of the molded surface is determined; then, based on the correspondence between the length of the molded surface and the number of resistors, the standard number of each resistor is determined, i.e., the number of resistors connected in parallel in the entire ladder-shaped resistor network; then, the resistance value corresponding to each resistor is determined; finally, based on the standard number of resistors and the resistance value corresponding to each resistor, the standard total resistance value after the resistors are connected in parallel is determined, and the preset conditions are determined based on the standard total resistance value. The preset conditions are accurately determined, which improves the reliability of the solution.

[0081] It should be noted that determining the standard number of each resistor is actually to measure the specific number of each resistor in the ladder-shaped resistor network when it is not broken, and then obtain the standard total resistance value.

[0082] As an optional embodiment, determining the current total resistance of the resistors currently connected in parallel includes:

[0083] Determine the number of resistors currently connected in parallel in each resistor group;

[0084] Determine the resistance value of each resistor currently connected in parallel;

[0085] The current total resistance of each resistor is determined based on the number of resistors currently connected in parallel and the resistance values ​​of each resistor currently connected in parallel.

[0086] In this invention, by determining the number of resistors currently connected in parallel in each resistor and the resistance value corresponding to each resistor currently connected in parallel in each resistor, the current total resistance value of the resistors currently connected in parallel in each resistor can be determined, thus accurately obtaining the current total resistance value of the resistors currently connected in parallel in each resistor.

[0087] As an optional embodiment, the wind turbine blade mold surface status monitoring device further includes: a display screen; and after determining the current total resistance value of the resistors currently connected in parallel among the resistors, it further includes:

[0088] The control display shows the current total resistance value.

[0089] In this invention, the wind turbine blade mold surface status monitoring device also includes a display screen. Therefore, after determining the current total resistance value of the resistors currently connected in parallel among the resistors, the processor will also control the display screen to display the current total resistance value, so that the user can view the current total resistance value.

[0090] As an optional embodiment, determining preset conditions based on the standard total resistance includes:

[0091] Determine the normal resistance range based on the standard total resistance value;

[0092] Use the normal resistance range as the preset condition;

[0093] Accordingly, it is determined whether the current total resistance meets the preset conditions, including:

[0094] Determine whether the current total resistance is within the normal resistance range;

[0095] If the current total resistance is within the normal resistance range, then the current total resistance is determined to meet the preset conditions.

[0096] If the current total resistance is not within the normal resistance range, then the current total resistance is determined not to meet the preset conditions.

[0097] In this invention, the normal resistance range is determined based on the standard total resistance value, and then it is determined whether the current total resistance value is within the normal resistance range. If the current total resistance value is within the normal resistance range, it proves that the current total resistance value meets the preset condition; if the current total resistance value is not within the normal resistance range, it proves that the current total resistance value does not meet the preset condition. By using the normal range as the preset condition, the invention accurately determines whether the current total resistance value meets the preset condition.

[0098] As an optional embodiment, after the current total resistance value is not within the normal resistance range, the method further includes:

[0099] The warning range is determined based on the standard total resistance value;

[0100] Determine whether the current total resistance is within the warning range, which includes the normal resistance range;

[0101] If the current total resistance is within the warning range, then the current total resistance does not meet the warning conditions.

[0102] If the current total resistance is not within the warning range, then the current total resistance is determined to meet the warning conditions.

[0103] In this invention, after determining that the current total resistance is not within the normal resistance range, a warning range is further established based on the standard total resistance, and it is then determined whether the current total resistance is within the warning range. The warning range includes the normal resistance range. If the current total resistance is within the warning range, it proves that the current total resistance does not meet the warning condition; if the current total resistance is not within the warning range, it proves that the current total resistance meets the warning condition. A more specific judgment is made for the current total resistance that is not within the normal resistance range.

[0104] It should be noted that if the current total resistance meets the warning conditions, the resistance monitoring and control device will output a warning signal.

[0105] As an optional embodiment, after the current total resistance value is not within the warning range, the method further includes:

[0106] Determine the alarm range based on the standard total resistance value;

[0107] Determine whether the current total resistance value is within the alarm range, which includes the warning range;

[0108] If the current total resistance is within the alarm range, then the current total resistance does not meet the alarm conditions.

[0109] If the current total resistance is not within the alarm range, then the current total resistance is determined to meet the alarm conditions.

[0110] In this invention, after determining that the current total resistance value is not within the warning range, an alarm range is further established based on the standard total resistance value. The invention then determines whether the current total resistance value is within this alarm range, where the alarm range includes the warning range. If the current total resistance value is within the alarm range, it indicates that the current total resistance value does not meet the alarm conditions; if the current total resistance value is not within the alarm range, it indicates that the current total resistance value meets the alarm conditions. A more specific determination is made for the current total resistance value that is not within the warning range.

[0111] It should be noted that if the current total resistance meets the alarm conditions, the resistance monitoring and control device will continuously output an alarm signal.

[0112] It should also be noted that if the blade length of the wind turbine blade monitoring section to be tested is 55m, and the distance between two adjacent resistors in the ladder-shaped resistor network is 0.5m, and there are 110 resistors with the same resistance value in the ladder-shaped resistor network, with a single resistor value of 11,000 ohms and a total resistance value of 100 ohms; then the normal resistance range in the alarm response logic should be set to 99.2 to 100.8 ohms; the lower limit of the warning range should be 100.8 ohms, and the upper limit of the warning range should be 101.9 ohms; the lower limit of the alarm range should be 101.9 ohms, and the upper limit of the alarm range should be 11,000 ohms.

[0113] It should also be noted that if the blade length of the wind turbine blade monitoring section to be tested is 70m, the distance between two adjacent resistors in the ladder-shaped resistor network is 0.7m, there are 100 resistors with the same resistance value in the ladder-shaped resistor network, the resistance value of a single resistor is 10000 ohms, and the total resistance value of the ladder-shaped resistor network is 100 ohms; then the normal resistance range in the alarm response logic should be set to 99.0 to 101.0 ohms; the lower limit of the warning range is 101.0 ohms, the upper limit of the warning range is 102.0 ohms; the lower limit of the alarm range is 102.0 ohms, and the upper limit of the alarm range is 10000 ohms.

[0114] It should also be noted that if the blade length of the wind turbine blade monitoring section to be tested is 60m, the distance between two adjacent resistors in the ladder-shaped resistor network is 1.0m, there are 60 resistors with the same resistance value in the ladder-shaped resistor network, the resistance value of a single resistor is 6000 ohms, and the total resistance value of the ladder-shaped resistor network is 100 ohms; then the normal resistance range in the alarm response logic should be set to 98.3 to 101.6 ohms; the lower limit of the warning range is 101.6 ohms, the upper limit of the warning range is 103.4 ohms; the lower limit of the alarm range is 103.4 ohms, and the upper limit of the alarm range is 6000 ohms.

[0115] It should also be noted that if the blade length of the wind turbine blade monitoring section to be tested is 80m, and the distance between two adjacent resistors in the ladder-shaped resistor network is 0.5m, there are 160 resistors with the same resistance value in the ladder-shaped resistor network, the resistance value of a single resistor is 16000 ohms, and the total resistance value of the ladder-shaped resistor network is 100 ohms; then the normal resistance range in the alarm response logic should be set to 99.3 to 100.6 ohms; the lower limit of the warning range is 100.6 ohms, and the upper limit of the warning range is 101.2 ohms; the lower limit of the alarm range is 101.2 ohms, and the upper limit of the alarm range is 6000 ohms.

[0116] It should also be noted that after laying the equipment according to the above four parameter requirements, an alarm value test is conducted by manually disconnecting several resistors in the ladder-shaped resistor network. After manually disconnecting one resistor, the remote online monitoring device issues a warning signal; after manually disconnecting two resistors, the resistance monitoring and control device issues an alarm signal; as the number of disconnected resistors continues to increase, the resistance monitoring and control device continues to output alarm signals.

[0117] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a wind turbine blade mold surface condition monitoring system provided by the present invention. The processor is applied to the wind turbine blade mold surface condition monitoring device. The wind turbine blade mold surface condition monitoring device further includes: a ladder-shaped resistor network comprising several resistors laid on the mold surface of the wind turbine blade, wherein the resistors are connected in parallel; the system includes:

[0118] Determining unit 11 is used to determine the current total resistance value of the resistors currently connected in parallel among the resistors;

[0119] Judgment unit 12 is used to determine whether the current total resistance value meets the preset conditions;

[0120] The first determination unit 13 is used to determine that the state of the mold parting surface is normal when the current total resistance value meets the preset conditions.

[0121] The second determination unit 14 is used to determine that the state of the mold parting surface is abnormal when the current total resistance value does not meet the preset conditions.

[0122] The wind turbine blade mold surface condition monitoring system provided in this embodiment corresponds to the above method, and therefore has the same beneficial effects as the above method. Therefore, for the embodiment of the wind turbine blade mold surface condition monitoring system, please refer to the description of the embodiment in the method section, which will not be repeated here.

[0123] The present invention also provides an embodiment of a wind turbine blade mold surface condition monitoring device, comprising:

[0124] A ladder-shaped resistor network, comprising several resistors, is laid on the mating surface of the fan blades, with each resistor connected in parallel.

[0125] The processor, connected to a ladder-shaped resistor network, is used to execute a computer program to implement the steps of the wind turbine blade mold surface condition monitoring method described above.

[0126] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor may also include a main processor and coprocessors. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessors are low-power processors used to process data in the standby state. In some embodiments, the processor may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0127] The wind turbine blade mold surface condition monitoring device provided in this embodiment corresponds to the above method, and therefore has the same beneficial effects as the above method. Therefore, for the embodiment of the wind turbine blade mold surface condition monitoring device, please refer to the description of the embodiment in the method section, which will not be repeated here.

[0128] The present invention also provides an embodiment corresponding to a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the steps of the wind turbine blade mold surface state monitoring method described above.

[0129] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0130] The computer-readable storage medium provided in this embodiment corresponds to the method described above, and therefore has the same beneficial effects as the method described above. Therefore, for the embodiments of the computer-readable storage medium, please refer to the description of the embodiments in the method section, which will not be repeated here.

[0131] It should be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0132] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of monitoring the condition of a wind turbine blade mould line, characterised by, The application is applied to a processor of a fan blade mold surface state monitoring device, the fan blade mold surface state monitoring device further comprises: a ladder-shaped resistance network including a plurality of resistors laid on a mold surface of a blade of a fan, each of the resistors is parallel to each other; the method comprises: determining a current total resistance value of the resistors currently in parallel; judging whether the current total resistance value meets a preset condition; if the current total resistance value meets the preset condition, determining that the state of the mold surface is a normal state; if the current total resistance value does not meet the preset condition, determining that the state of the mold surface is an abnormal state; the determination of the current total resistance value of the resistors currently in parallel comprises: determining the number of the resistors currently in parallel; determining the resistance value corresponding to each of the resistors currently in parallel; determining the current total resistance value of the resistors currently in parallel based on the number of the resistors currently in parallel and the resistance value corresponding to each of the resistors currently in parallel.

2. The fan blade closure line condition monitoring method of claim 1, wherein, Before the determination of the current total resistance value of the resistors currently in parallel, further comprising: determining the length of the mold surface; determining the standard number of the resistors based on the length and the corresponding relationship between the length of the mold surface and the number of the resistors; determining the resistance value corresponding to each of the resistors; determining the standard total resistance value after the parallel connection of the resistors based on the standard number and the resistance value corresponding to each of the resistors; determining the preset condition based on the standard total resistance value.

3. The method of claim 1, wherein The fan blade mold surface state monitoring device further comprises a display screen; after the determination of the current total resistance value of the resistors currently in parallel, further comprising: controlling the display screen to display the current total resistance value.

4. The fan blade closure line condition monitoring method of claim 2, wherein, The determination of the preset condition based on the standard total resistance value comprises: determining a normal resistance value interval based on the standard total resistance value; taking the normal resistance value interval as the preset condition; correspondingly, the judgment of whether the current total resistance value meets the preset condition comprises: judging whether the current total resistance value is located in the normal resistance value interval; if the current total resistance value is located in the normal resistance value interval, determining that the current total resistance value meets the preset condition; if the current total resistance value is not located in the normal resistance value interval, determining that the current total resistance value does not meet the preset condition.

5. A method of mould line condition monitoring of a fan blade according to claim 4, characterised in that, After the determination that the current total resistance value is not located in the normal resistance value interval, further comprising: determining an alarm interval based on the standard total resistance value; judging whether the current total resistance value is located in the alarm interval, the alarm interval containing the normal resistance value interval; if the current total resistance value is located in the alarm interval, determining that the current total resistance value does not meet an alarm condition; if the current total resistance value is not located in the alarm interval, determining that the current total resistance value meets the alarm condition.

6. The method of mould line condition monitoring of a fan blade according to claim 5, characterised in that, After the determination that the current total resistance value is not located in the alarm interval, further comprising: determining an alarm interval based on the standard total resistance value; judging whether the current total resistance value is located in the alarm interval, the alarm interval containing the normal resistance value interval; if the current total resistance value is located in the alarm interval, determining that the current total resistance value does not meet an alarm condition; If the current total resistance value is not located in the alarm interval, it is determined that the current total resistance value meets an alarm condition.

7. A wind turbine blade closure face condition monitoring system characterised in that, The processor is applied to a fan blade mold closing surface state monitoring device, and the fan blade mold closing surface state monitoring device further comprises a ladder-shaped resistance network including a plurality of resistors laid on a mold closing surface of a blade of a fan, and each of the resistors is in parallel with each other. A determination unit is configured to determine a current total resistance value of the resistors currently in parallel. A judgment unit is configured to judge whether the current total resistance value meets a preset condition. A first determination unit is configured to determine that a state of the mold closing surface is a normal state when the current total resistance value meets the preset condition. A second determination unit is configured to determine that the state of the mold closing surface is an abnormal state when the current total resistance value does not meet the preset condition. The determination unit is specifically configured to: determine a number of the resistors currently in parallel; determine resistance values respectively corresponding to the resistors currently in parallel; and determine the current total resistance value of the resistors currently in parallel based on the number of the resistors currently in parallel and the resistance values respectively corresponding to the resistors currently in parallel.

8. A wind turbine blade closure face condition monitoring device, characterised in that, The fan blade mold closing surface state monitoring device comprises: a ladder-shaped resistance network including a plurality of resistors laid on a mold closing surface of a blade of a fan, and each of the resistors is in parallel with each other. A processor connected with the ladder-shaped resistance network is configured to execute a computer program to realize steps of the fan blade mold closing surface state monitoring method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, A computer program is saved, and the computer program is executed by a processor to realize steps of the fan blade mold closing surface state monitoring method according to any one of claims 1 to 6.

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