A tower and tower foundation monitoring system and monitoring method

Abstract

The application provides a tower drum, a tower drum foundation monitoring system and a monitoring method, the monitoring system comprises a sensor monitoring module, an acquisition module and an edge computing module connected in sequence, the sensor monitoring module comprises a load sensor arranged at a concrete tower drum segment, a double-axis inclination sensor arranged on a tower drum bottom connecting flange or a tower bottom foundation surface and a stay wire sensor arranged at a transverse joint and a longitudinal joint of the concrete tower drum and embedded in a top of the tower drum foundation, the edge computing module is connected with a fan main control, data analysis results are fed back to the fan main control, and the fan main control performs remote alarm on dangerous information. The monitoring system monitors tower drum load, tower bottom settlement, tower drum foundation cracking and transverse and longitudinal joints of the concrete tower drum, and establishes a review relationship between various monitoring data, the monitoring result has high accuracy, can timely early warning and early manual intervention, and ensures safe operation of the unit.

Description

Technical Field

[0001] This invention relates to the field of monitoring technology for the concrete section of a concrete tower, specifically to a tower and tower foundation monitoring system and monitoring method. Background Technology

[0002] As a crucial component of new energy sources, wind turbine generators have experienced rapid development. With the deepening of wind resource development and the expansion of Class III and VI wind zones, the height of wind turbine towers is continuously increasing. Due to the advantages of hybrid towers, such as stable power generation, no need for dampers, low maintenance costs, and good unit stability, hybrid towers are being used more and more widely. The segmented concrete tower sections in hybrid towers are produced through on-site casting or prefabrication, effectively reducing transportation and procurement costs. The continuous increase in tower height and turbine capacity leads to a continuous increase in the dynamic load transmitted from the blades to the tower, which is then transmitted downwards along the wind turbine tower until it reaches the foundation. During this process, the tower base and frame bear the final load, and changes and anomalies in the unit load are primarily reflected in changes in the tower load. When the load exceeds the design range, phenomena such as tower tilting and foundation settlement may occur, posing a significant risk to the safe operation of the unit.

[0003] Segmented concrete towers are constructed by splicing multiple concrete tower sections together, with each section consisting of two or more pieces. This results in numerous joints and a tower height exceeding 180m. When the turbine load exceeds the tower's bearing capacity or local defects occur, the effects are particularly noticeable at the joints. Therefore, monitoring the concrete sections of the tower and its foundation is crucial for the safe operation of the turbine. Traditional monitoring methods involve manual observation of the turbine foundation settlement points and the condition of the concrete sections. However, this method is susceptible to variations in geographical location, weather conditions, and human factors, leading to untimely or inaccurate observations. Patent CN116517788A discloses an online health monitoring system for concrete tower structures of wind turbines, including a data acquisition module, a data transmission module, a data processing module, and a user interface. The data acquisition module includes tilt sensors, acceleration sensors, strain sensors, and a data processing module. The tilt sensors collect tilt angle information at the top and bottom of the concrete tower; the acceleration sensors collect vibration information of the concrete tower; and the strain sensors collect deformation information of the steel strands in the concrete tower structure. The system collects monitoring data from various parts of the concrete tower and generates a real-time overall health status of the concrete tower based on the health status of each part. This allows for the timely detection of structural anomalies, preventing serious accidents and improving structural safety. However, the online monitoring system still has the following problems: (1) It does not monitor the joints of the concrete sections of the concrete tower, and cannot intuitively reflect the abnormal situation at the joints; (2) Only after the tower tilts and the steel strands deform can the changes in tilt and strain data be detected, and then the health status of the tower can be judged. Therefore, the monitoring of tilt and strain data is lagging and insensitive, and cannot intervene and protect in a timely manner. Summary of the Invention

[0004] This invention provides a tower and tower foundation monitoring system and method. The monitoring system monitors tower load, tower base settlement, tower foundation cracking, and transverse and longitudinal joints of concrete tower. It also establishes a verification relationship between various monitoring data, resulting in high accuracy of monitoring results. It can provide timely warnings and allow for early manual intervention to ensure the safe operation of the unit.

[0005] The technical solution adopted to achieve the above-mentioned objectives of this invention is as follows:

[0006] A tower and tower foundation monitoring system, installed on a segmented concrete tower and tower foundation, includes a sensor monitoring module, a data acquisition module, and an edge computing module connected in sequence. The sensor monitoring module includes:

[0007] The load sensors are arranged in multiple circumferentially on the side wall of each concrete tower section, and one of the load sensors in each concrete tower section is installed in the direction with the most wind direction distribution throughout the year.

[0008] Two biaxial tilt sensors are arranged on the connecting flange at the bottom of the tower or on the foundation surface of the tower. The arrangement of the two biaxial tilt sensors meets the following conditions: a1. Both biaxial tilt sensors are located on the circumference with the center of the tower as the center, and the included angle between them is 90°; a2. Both biaxial tilt sensors monitor the tilt angle values ​​in the horizontal X and Y directions; a3. One of the monitoring directions of one of the biaxial tilt sensors faces the direction with the most frequent wind direction distribution throughout the year.

[0009] The wire sensor includes a conductive sensing wire and a continuity monitoring unit. The conductive sensing wire is arranged at the transverse and longitudinal joints of the concrete tower and at the top of the tower foundation. The continuity monitoring unit is connected to the conductive sensing wire and monitors the continuity of the conductive sensing wire. The continuity monitoring module is connected to the acquisition module.

[0010] The edge computing module is connected to the wind turbine main controller and feeds back the data analysis results to the wind turbine main controller, which then remotely alarms for dangerous information.

[0011] The conductive sensing lines at the transverse and longitudinal joints are distributed in a serpentine pattern along both sides of the joint. The conductive sensing lines pre-embedded in the tower foundation include circumferential sensing lines and radial sensing lines. Multiple circumferential sensing lines are distributed and buried with the center of the tower foundation as the center, and the radial sensing lines are laid in a bend along the radial direction of the tower foundation.

[0012] The conductive sensing line is an enameled wire or a stainless steel wire.

[0013] During the concrete pouring process of the tower foundation, circumferential and radial sensing lines are pre-embedded at the top, or after the tower foundation is completed, circumferential and radial sensing lines are pre-embedded and sealed with homogeneous concrete material.

[0014] The acquisition module is a multi-serial port acquisition instrument that enables the access of various sensors; the edge computing module is integrated in the tower base cabinet, which supplies power to the entire tower and tower foundation monitoring system.

[0015] The present invention also provides a monitoring method for a tower and tower foundation monitoring system, comprising the following steps:

[0016] S1. Load sensors, biaxial tilt sensors and guy wire sensors are arranged on the concrete tower and tower foundation. Each sensor is connected to the acquisition module and the acquisition module is connected to the edge computing module.

[0017] S2. Load sensors monitor load data in all directions during unit operation; dual-axis tilt sensors monitor tilt data in the horizontal and vertical directions; and wire sensors monitor the continuity signals of conductive sensing wires at transverse and longitudinal joints and within the tower foundation.

[0018] S3. The acquisition module collects monitoring data from each sensor and transmits the data to the edge computing module. The edge computing module analyzes and processes the monitoring data to generate feedback on whether the unit is operating safely. The specific steps are as follows:

[0019] S31. The edge computing module analyzes and processes the load data, determines whether the load threshold is exceeded and provides feedback. If the threshold is exceeded, the wind turbine main controller takes load reduction measures to reduce the load below the threshold.

[0020] S32. The edge computing module analyzes and processes the tilt angle data, calculates the tower tilt angle and settlement, determines whether the settlement and tilt value thresholds are exceeded and provides feedback. If the thresholds are exceeded, the wind turbine main control will issue a remote alarm. At the same time, the tilt angle data and load data will be reviewed to further remotely determine the safety of the unit and allow for early human intervention.

[0021] S33. The edge computing module receives and feeds back the on / off signals at the horizontal and vertical joints. If a breakage signal is fed back, the main control of the fan will remotely alarm. At the same time, it will verify the on / off signals at the horizontal and vertical joints with the feedback from the load sensor to determine whether to stop the machine and intervene manually in advance.

[0022] S34. The edge computing module receives and feeds back the on / off signals within the tower foundation. If a breakage signal is fed back, the wind turbine main controller will issue a remote alarm. At the same time, it will verify the on / off signals within the tower foundation with the feedback from the dual-axis tilt sensors to determine whether to shut down the machine and intervene manually in advance.

[0023] The edge computing module acquires wind parameters and unit operating parameters collected by the wind turbine main control unit, and combines them with monitoring data for analysis.

[0024] The specific steps for verifying the tilt angle data and load data in step S32 are as follows: if the load threshold ≤ the maximum load value ≤ 1.1 times the load threshold, and the duration exceeds the set duration t1, then an alarm is triggered again; if the maximum load value > 1.1 times the load threshold, and the duration exceeds the set duration t2, the wind turbine main controller takes load reduction measures to reduce the maximum load value below the threshold.

[0025] The specific steps in step S33 for verifying the on / off signals and load sensor feedback at the joints and longitudinal joints are as follows: check the tower load value and unit operating parameters. If the unit is simultaneously at the load threshold ≤ maximum load ≤ 1.1 times the load threshold when the breakage signal is fed back, then the unit should be feathered and shut down in time.

[0026] The specific steps in step S34 of verifying the on / off signal within the tower foundation with the feedback from the dual-axis tilt sensor are as follows: check the tilt monitoring value of the dual-axis tilt sensor; if the tilt monitoring value increases significantly or the tilt monitoring value is greater than or equal to the tilt threshold, stop the machine immediately.

[0027] Compared with existing technologies, the beneficial effects of the tower and tower foundation monitoring system and method provided by this invention are as follows: 1. The tower and tower foundation monitoring system provided by this invention remotely monitors tower load, tower base settlement, tower foundation cracking, and transverse and longitudinal joints of the concrete tower, ensuring the safe operation of the unit. Tower foundation cracking and the transverse and longitudinal joints of the concrete tower are monitored using guy wire sensors. Once any abnormality occurs at the joints or in the tower foundation, a fracture signal can be promptly fed back, allowing for early manual intervention.

[0028] 2. In this invention, the tilt angle data is verified with the load data, the on / off signals at the transverse and longitudinal joints are verified with the feedback from the load sensor, and the on / off signals within the tower foundation are verified with the feedback from the dual-axial tilt angle sensor. This establishes a verification relationship between the various monitoring data, resulting in high accuracy of the monitoring results. It can provide timely warnings and allow for early manual intervention, ensuring the safe operation of the unit throughout its entire life cycle.

[0029] 3. In this invention, the edge computing module is connected to the wind turbine main control. If the load monitored by the feedback load sensor exceeds the threshold, the wind turbine main control will take proactive load reduction measures to control the tower load and ensure the safe operation of the unit. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the layout of the tower and tower foundation monitoring system provided in this invention;

[0031] Figure 2 This is a layout diagram of the tower and tower foundation monitoring system provided in this invention;

[0032] In the diagram: 1-segmented concrete tower, 11-transverse joint, 12-longitudinal joint, 2-tower foundation, 3-multi-serial port data acquisition device, 4-tower base cabinet, 5-load sensor, 6-dual-axial tilt sensor, 71-conductive sensing line at the transverse and longitudinal joints, 72-circumferential sensing line, 73-radial sensing line. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] The layout diagram of the tower and tower foundation monitoring system provided in this embodiment is as follows: Figure 1As shown, the tower and tower foundation monitoring system is installed on the segmented concrete tower 1 and tower foundation 2. The segmented concrete tower is composed of multiple concrete tower sections spliced ​​together vertically, and each concrete tower section is composed of two or more precast concrete pieces. Therefore, monitoring at the concrete tower sections and at the transverse joints 11 (including the concrete tower sections) and longitudinal joints 12 between the precast concrete pieces are important parts of the tower monitoring.

[0035] The tower and tower foundation monitoring system includes a sensor monitoring module, a data acquisition module, and an edge computing module connected in sequence. The sensor monitoring module monitors the tower and tower foundation. The data acquisition module collects the monitoring data and transmits it to the edge computing module. In this embodiment, the data acquisition module is a multi-serial port data acquisition unit 3, which can connect multiple sets of sensors. The edge computing module analyzes and processes the monitoring data, generating feedback on whether the unit is operating safely. The edge computing module is integrated into the tower base cabinet 4, which supplies power to the entire tower and tower foundation monitoring system. The multi-serial port data acquisition unit draws power from the tower base cabinet, and each sensor is powered through the multi-serial port data acquisition unit.

[0036] In this embodiment, the sensor monitoring module includes a load sensor 5, a biaxial tilt sensor 6, and a wire sensor. Multiple load sensors are distributed circumferentially on the sidewalls of each concrete tower section, and one of the load sensors at each concrete tower section is installed in the direction with the most frequent wind direction distribution throughout the year. Figure 1 Four load sensors are installed along the circumferential direction at the section of the concrete tower to capture the magnitude of load changes in all directions during the year's operation of the unit.

[0037] Two biaxial tilt sensors are arranged on the connecting flange at the bottom of the tower or on the foundation surface. The arrangement of the two biaxial tilt sensors meets the following conditions: a1. Both biaxial tilt sensors are located on a circle centered on the center of the tower, and the included angle between them is 90°; a2. Both biaxial tilt sensors monitor the tilt angle values ​​in the horizontal X and Y directions; a3. One of the monitoring directions of one of the biaxial tilt sensors faces the direction with the most prevailing wind direction throughout the year (i.e., the prevailing wind direction). By monitoring the tilt angle values ​​of the tower in the horizontal and vertical directions using the two biaxial tilt sensors, the tower's tilt angle and settlement can be determined. Specifically, during the deployment and testing of the biaxial tilt sensor, the tilting equipment is deployed based on the completed tower foundation and tower. Therefore, the test result value is a relative value. Since the two biaxial tilt sensors are arranged vertically, that is, the tilt angle in the X direction of one biaxial tilt sensor and the tilt angle in the Y direction of the other biaxial tilt sensor are in the same direction (considering the stiffness of the tower base), in order to reduce the deployment deviation, the absolute value of the angle in the same direction is extracted and compared. If the difference between the two absolute values ​​exceeds 10%, a fault feedback is reported and the tilt angle of the biaxial tilt sensor is adjusted so that the difference between the two absolute values ​​is less than 10%.

[0038] The guy wire sensor includes a conductive sensing wire and a continuity monitoring unit. The conductive sensing wire is made of conductive material, such as enameled wire or stainless steel wire. It is placed at the transverse and longitudinal joints of the concrete tower and embedded in the top of the tower foundation. The continuity monitoring unit is connected to the conductive sensing wire and monitors its continuity. The continuity monitoring module is connected to the acquisition module. Given the low strength and poor plasticity of the conductive sensing wire, cracks in the transverse and longitudinal joints and the tower foundation will cause it to break, which will be reflected in the continuity signal detected by the continuity monitoring unit. This allows for monitoring the safety of the transverse and longitudinal joints of the concrete tower and the tower foundation. Furthermore, the continuity of the conductive sensing wire at the transverse and longitudinal joints is correlated with the load sensor value. Therefore, the continuity signals from the guy wire sensor at the transverse and longitudinal joints can be combined with the load sensor feedback to further remotely determine the safety of the tower.

[0039] In this embodiment, the conductive sensing lines 71 at the transverse and longitudinal joints are distributed in a serpentine pattern along both sides of the joint. When the ultimate load exceeds the tower's bearing capacity or the fatigue load reaches its lifespan, or when there are defects in the casting or prefabrication process, the gap at the transverse or longitudinal joint will change significantly. Once cracks appear at the transverse and longitudinal joints, the conductive sensing lines will be pulled apart, and the pull-wire sensor will output a breakage signal.

[0040] The conductive sensing wires pre-embedded within the tower foundation include circumferential sensing wires 72 and radial sensing wires 73. Multiple circumferential sensing wires are distributed around the center of the tower foundation, while the radial sensing wires are routed radially around the tower foundation. Specifically, the circumferential and radial sensing wires are pre-embedded at the top during the concrete pouring process of the tower foundation, or they are pre-embedded after the tower foundation is completed and sealed with homogeneous concrete. When the tower foundation settles, circumferential or radial cracks may form, breaking the circumferential or radial sensing wires, and the pull-wire sensor will output a breakage signal. Therefore, the continuity signal of the circumferential or radial sensing wires can be combined with the parameter values ​​of the dual-axial tilt sensor to further confirm the safety of the tower.

[0041] In this embodiment, the edge computing module is connected to the wind turbine main controller and feeds back the data analysis results to the wind turbine main controller, which then remotely alarms for dangerous information.

[0042] The monitoring method for the tower and tower foundation monitoring system provided in this embodiment includes the following steps:

[0043] S1. Load sensors, biaxial tilt sensors and guy wire sensors are arranged on the concrete tower and tower foundation. Each sensor is connected to the acquisition module and the acquisition module is connected to the edge computing module.

[0044] S2. Load sensors monitor load data in all directions during unit operation; dual-axis tilt sensors monitor tilt data in the horizontal and vertical directions; and wire sensors monitor the continuity signals of conductive sensing wires at transverse and longitudinal joints and within the tower foundation.

[0045] S3. The data acquisition module collects monitoring data from various sensors and transmits the data to the edge computing module. The edge computing module analyzes and processes the monitoring data, generating feedback on whether the unit is operating safely, such as... Figure 2 As shown, the specific steps are as follows:

[0046] S31. The edge computing module analyzes and processes the load data, determines whether the load exceeds the load threshold (the load that the tower can withstand during the design) and provides feedback. If the threshold is exceeded, the wind turbine main control takes load reduction measures to reduce the load below the threshold, such as adjusting the pitch angle, in order to control the tower load and ensure the safe operation of the unit throughout its entire life cycle.

[0047] S32. The edge computing module analyzes and processes the tilt angle data, calculates the tower tilt angle and settlement. Specifically, it averages the two absolute values ​​in the same direction of the two biaxial tilt angle sensors, takes the square root of the arithmetic, and combines it with the tower bottom diameter value to obtain the corresponding settlement value. It then determines whether the settlement and tilt value thresholds are exceeded and provides feedback. If the thresholds are exceeded, the main control unit of the fan will issue a remote alarm.

[0048] During the unit design process, the magnitude of the tilt angle change is related not only to the settlement of the tower foundation but also directly to the load data. Theoretically, the trends of both should be consistent. Therefore, when the tilt angle exceeds a threshold, the tilt angle data and load data are reviewed to further remotely determine the unit's safety. Specifically, the maximum load value data is reviewed. If the load threshold ≤ maximum load value ≤ 1.1 times the load threshold, and the duration exceeds the set duration t1, an alarm is triggered again, and manual intervention is initiated, such as further local surveys and remedial measures. If the maximum load value > 1.1 times the load threshold, and the duration exceeds the set duration t2, the turbine main control system implements load reduction measures to lower the maximum load value below the threshold. Durations t1 and t2 are set according to the unit's characteristics.

[0049] S33. The edge computing module receives and feeds back the on / off signals at the transverse and longitudinal joints. If a breakage signal is fed back, the main control unit of the wind turbine will remotely alarm. At the same time, it will verify the on / off signals at the transverse and longitudinal joints with the feedback from the load sensor to further remotely determine the safety of the unit and intervene in advance (such as performing local detection, identifying risk locations, and carrying out emergency repairs at risk locations).

[0050] The appearance of a breakage signal at a transverse or longitudinal joint is the highest level of safety warning, and the unit is highly likely to experience serious situations such as tower collapse. Therefore, once an on / off alarm is detected, the tower load value and unit operating parameters (such as real-time wind parameters) must be checked immediately. If the unit is simultaneously at a load threshold of ≤ maximum load ≤ 1.1 times the load threshold when the breakage signal is detected, the unit should be immediately feathered and shut down, and the integrity of the segmented concrete tower should be monitored or inspected on-site.

[0051] S34. The edge computing module receives and feeds back the on / off signals within the tower foundation. If a breakage signal is detected, the wind turbine main controller will issue a remote alarm. At the same time, the on / off signals within the tower foundation will be compared with the feedback from the dual-axis tilt sensors to further remotely determine the safety of the unit and allow for early human intervention (such as conducting flaw detection or visual inspection of the local foundation concrete structure, assessing risks, and taking remedial measures).

[0052] During normal operation, the tower tilt angle is set to a threshold value. The unit will operate normally as long as the threshold is not exceeded. If a fracture signal is detected in the tower foundation, it indicates that significant cracks have appeared in the foundation settlement, posing a serious safety risk to the unit's tower foundation. This is usually accompanied by settlement. After the guy wire sensor issues an alarm, the tilt angle monitoring value of the biaxial tilt sensor should be checked. If the tilt angle monitoring value significantly increases (exceeding its normal fluctuation range) or is greater than or equal to the tilt angle threshold, the unit should be shut down immediately for local inspection or monitoring.

[0053] In this embodiment, the edge computing module acquires wind parameters and turbine operating parameters collected by the turbine's main control unit and analyzes them in conjunction with monitoring data. Specifically, the turbine's operating parameters (wind speed and direction, pitch angle, and yaw angle) are strongly correlated with the final load transmitted from the tower to the foundation. The monitoring data from the dual-axis tilt sensor and the tower load sensor can be correlated with the turbine's operating parameters. By comparing parameters such as wind direction, wind speed, and pitch angle with the feedback values ​​from the dual-axis tilt sensor and the tower load sensor, the operational risk of the turbine can be assessed. In particular, when the guy wire sensor shows a breakage feedback, the tower and tower foundation are already at serious risk. By verifying the turbine's operating parameters with the feedback values ​​from the dual-axis tilt sensor and the tower load sensor, safety can be further confirmed, and a decision can be made on whether to shut down the turbine, thus protecting the unit.

Claims

1. A monitoring system for monitoring a tower and its foundation, wherein the tower is a segmented concrete tower, the monitoring system is installed on the segmented concrete tower and its foundation, and comprises a sensor monitoring module, a data acquisition module, and an edge computing module connected in sequence, characterized in that: The sensor monitoring module includes: The load sensors are arranged in multiple circumferentially on the side wall of each concrete tower section, and one of the load sensors in each concrete tower section is installed in the direction with the most wind direction distribution throughout the year. Two biaxial tilt sensors are arranged on the connecting flange at the bottom of the tower or on the foundation surface of the tower. The arrangement of the two biaxial tilt sensors meets the following conditions: a1. Both biaxial tilt sensors are located on the circumference with the center of the tower as the center, and the included angle between them is 90°; a2. Both biaxial tilt sensors monitor the tilt angle values ​​in the horizontal X and Y directions; a3. One of the monitoring directions of one of the biaxial tilt sensors faces the direction with the most frequent wind direction distribution throughout the year; during the arrangement and testing of the biaxial tilt sensors, the absolute values ​​of the angles in the same direction are extracted and compared. The wire sensor includes a conductive sensing wire and a continuity monitoring unit. The conductive sensing wire is arranged at the transverse and longitudinal joints of the concrete tower and at the top of the tower foundation. The continuity monitoring unit is connected to the conductive sensing wire and monitors the continuity of the conductive sensing wire. The continuity monitoring module is connected to the acquisition module. The edge computing module is connected to the wind turbine main controller and feeds back the data analysis results to the wind turbine main controller, which then remotely alarms for dangerous information. The monitoring method of the monitoring system includes the following steps: S1. Load sensors, biaxial tilt sensors and guy wire sensors are arranged on the concrete tower and tower foundation. Each sensor is connected to the acquisition module and the acquisition module is connected to the edge computing module. S2. Load sensors monitor load data in all directions during unit operation; dual-axis tilt sensors monitor tilt data in the horizontal and vertical directions; and wire sensors monitor the continuity signals of conductive sensing wires at transverse and longitudinal joints and within the tower foundation. S3. The acquisition module collects monitoring data from each sensor and transmits the data to the edge computing module. The edge computing module analyzes and processes the monitoring data to generate feedback on whether the unit is operating safely. The specific steps are as follows: S31. The edge computing module analyzes and processes the load data, determines whether the load threshold is exceeded and provides feedback. If the threshold is exceeded, the wind turbine main controller takes load reduction measures to reduce the load below the threshold. S32. The edge computing module analyzes and processes the tilt angle data, calculates the tower tilt angle and settlement, determines whether the settlement and tilt value thresholds are exceeded and provides feedback. If the thresholds are exceeded, the wind turbine main control will issue a remote alarm. At the same time, the tilt angle data and load data will be reviewed to further remotely determine the safety of the unit and allow for early human intervention. The specific method for calculating the tower tilt angle and settlement is as follows: average the two absolute values ​​in the same direction of the two biaxial tilt sensors, take the square root of the arithmetic, and combine it with the tower bottom diameter value to obtain the corresponding settlement value. The specific steps for verifying the tilt angle data and load data are as follows: If the load threshold is less than or equal to 1.1 times the load threshold and the duration exceeds the set duration t1, an alarm will be triggered again; if the load value is greater than 1.1 times the load threshold and the duration exceeds the set duration t2, the wind turbine main control will take load reduction measures to reduce the load value to below the threshold. S33. The edge computing module receives and feeds back the on / off signals at the horizontal and vertical joints. If a breakage signal is fed back, the main control of the fan will remotely alarm. At the same time, it will verify the on / off signals at the horizontal and vertical joints with the feedback from the load sensor to determine whether to stop the machine and intervene manually in advance. The specific steps for verifying the continuity signals at the transverse and longitudinal joints with the feedback from the load sensor are as follows: check the tower load value and the unit operating parameters. If the unit is simultaneously at the load threshold ≤ maximum load ≤ 1.1 times the load threshold when the breakage signal is fed back, then the unit should be shut down immediately by feathering. S34. The edge computing module receives and feeds back the on / off signal inside the tower foundation. If a breakage signal is fed back, the wind turbine main control will remotely alarm. At the same time, it will verify the on / off signal inside the tower foundation with the feedback from the dual-axis tilt sensor to determine whether to stop the machine and intervene manually in advance. The specific steps for verifying the on / off signals within the tower foundation with the feedback from the biaxial tilt sensor are as follows: check the tilt monitoring value of the biaxial tilt sensor. If the tilt monitoring value increases significantly or is greater than or equal to the tilt threshold, stop the machine immediately.

2. The monitoring system according to claim 1, characterized in that: The conductive sensing lines at the transverse and longitudinal joints are distributed in a serpentine pattern along both sides of the joint. The conductive sensing lines pre-embedded in the tower foundation include circumferential sensing lines and radial sensing lines. Multiple circumferential sensing lines are distributed and buried with the center of the tower foundation as the center, and the radial sensing lines are laid in a bend along the radial direction of the tower foundation.

3. The monitoring system according to claim 2, characterized in that: The conductive sensing line is an enameled wire or a stainless steel wire.

4. The monitoring system according to claim 2, characterized in that: During the concrete pouring process of the tower foundation, circumferential and radial sensing lines are pre-embedded at the top, or after the tower foundation is completed, circumferential and radial sensing lines are pre-embedded and sealed with homogeneous concrete material.

5. The monitoring system according to claim 1, characterized in that: The acquisition module is a multi-serial port acquisition instrument that enables the access of various sensors; the edge computing module is integrated in the cabinet at the bottom of the tower, which supplies power to the entire monitoring system.

6. The monitoring system according to claim 1, characterized in that: The edge computing module acquires wind parameters and unit operating parameters collected by the wind turbine main control unit, and combines them with monitoring data for analysis.

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