Photovoltaic flexible support global dynamic sensing system and service life prediction method

Abstract

The invention discloses a photovoltaic flexible support global dynamic sensing system and a life prediction method. The photovoltaic flexible support global dynamic sensing system is composed of a magnetic flux sensor array, a bionic packaging structure, a piezoelectric self-powered module, a four-dimensional correlation analysis module and a digital twin life prediction system. The magnetic flux sensor monitors cable force, strain and vibration in real time, and data are transmitted to the digital twin system for building a database. The bionic structure monitors strain and wind load and protects the sensor. The piezoelectric module uses vibration to generate power for the sensor, and transmits vibration data. And the four-dimensional analysis module associates multi-source data and optimizes equation parameters. The digital twin system monitors cable force overrun, traces data of adjacent sensors, positions damage in combination with vibration spectrum, and achieves life prediction. According to the invention, automation of the whole process from data acquisition and processing to analysis and prediction is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy structure safety monitoring, and specifically relates to a photovoltaic flexible bracket full-area dynamic perception system and a life prediction method. Background Art

[0002] There are three major bottlenecks in the current photovoltaic flexible support monitoring technology:

[0003] 1) Sensors are imported: Traditional vibrating-wire sensors are susceptible to electromagnetic interference and have poor long-term stability, and cannot adapt to the continuous dynamic deformation of flexible brackets;

[0004] 2) Data silos are serious: multiple parameters such as cable force, vibration, and strain are collected independently, lacking global mechanical correlation analysis;

[0005] Life prediction gap: There is no support remaining life assessment model based on actual working conditions, and operation and maintenance decisions lack data support.

[0006] 3) Although existing technologies such as CN202411685088.5 propose a multi-sensor fusion solution, they do not solve the data drift problem under continuous deformation of flexible bodies and do not involve life prediction. Summary of the Invention

[0007] The present invention provides a full-area dynamic perception system and life prediction method for a photovoltaic flexible bracket, aiming to solve the problems existing in the current monitoring of photovoltaic flexible brackets.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A photovoltaic flexible support full-area dynamic sensing system, comprising:

[0010] The magnetic flux sensor array is used to monitor the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmit the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area;

[0011] Bionic packaging structure for flexible bracket strain, wind load monitoring and magnetic flux sensor life protection;

[0012] A piezoelectric self-powered module is used for flexible bracket vibration monitoring and vibration monitoring result transmission, and the piezoelectric self-powered module utilizes the flexible bracket vibration to generate electricity for the magnetic flux sensor;

[0013] The four-dimensional correlation analysis module is used to perform correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establish the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time through the improved particle swarm algorithm to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module;

[0014] The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces back to the data of three adjacent magnetic flux sensors and locates the damage position in combination with vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible brackets.

[0015] A further improvement of the present invention is that the deployment density of the magnetic flux sensor array is 5 per meter, and a magnetic permeability-rope force nonlinear calibration curve is used to verify and correct the consistency between the magnetic flux sensor array and the rope force measurement. The rope force measurement error is controlled within ±2%, and the formula is: F = α·ΔB2+β·ΔB+γ, where F is the rope force; ΔB is the displacement or deformation change of the rope; α and β reflect the coupling effect of material properties and the environment; γ is the initial installation tension.

[0016] A further improvement of the present invention is that α=0.032, β=-1.28, and γ=15.6.

[0017] A further improvement of the present invention is that the bionic packaging structure can enable the magnetic flux sensor to maintain an accuracy attenuation rate of <3% under conditions of a wind speed of 15 m / s and a dust concentration of 200 mg / m3.

[0018] A further improvement of the present invention is that the digital twin life prediction system includes a full-area three-dimensional real scene of the flexible photovoltaic power station and a four-dimensional real-time monitoring and simulation prediction process based on "wind load-cable force-vibration-strain"; a modified Miner criterion is introduced in the simulation prediction process.

[0019] A further improvement of the present invention is that the global dynamic perception system supports AR visualization, and operation and maintenance personnel view real-time stress cloud maps through Hololens glasses.

[0020] A further improvement of the present invention is that the vibration spectrum analysis adopts a resolution of 0.1 Hz.

[0021] A life prediction method for a photovoltaic flexible bracket global dynamic sensing system, comprising:

[0022] The magnetic flux sensor array monitors the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmits the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area;

[0023] Bionic packaging structure protects flexible bracket strain, wind load monitoring and magnetic flux sensor life;

[0024] The piezoelectric self-powered module transmits the vibration monitoring and vibration monitoring results of the flexible bracket, and uses the vibration of the flexible bracket to generate electricity for the magnetic flux sensor;

[0025] The four-dimensional correlation analysis module performs correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establishes the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and uses the improved particle swarm algorithm to optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module;

[0026] The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces back to the data of the three adjacent magnetic flux sensors and locates the damage position in combination with vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible brackets.

[0027] A further improvement of the present invention is that the magnetic flux sensor array uses a magnetic permeability-cable force nonlinear calibration curve to verify and correct the consistency of the magnetic flux sensor array and the cable force measurement, so that the cable force measurement error is controlled within ±2%.

[0028] A further improvement of the present invention is that the bionic packaging structure enables the magnetic flux sensor to maintain an accuracy attenuation rate of <3% under conditions of a wind speed of 15 m / s and a dust concentration of 200 mg / m3.

[0029] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0030] The present invention provides a full-area dynamic perception system and life prediction method for a photovoltaic flexible support, which uses a magnetic flux sensor array to perform real-time monitoring of the cable force distribution, strain and vibration spectrum of the photovoltaic flexible support in the entire area, ensuring the comprehensiveness and accuracy of the monitoring. The bionic packaging structure is not only used to monitor the strain and wind load of the flexible support, but also protects the life of the magnetic flux sensor, thereby improving the reliability and durability of the system. The piezoelectric self-powered module uses the vibration of the flexible support to generate electricity and provide energy for the magnetic flux sensor, thereby achieving energy self-sufficiency and reducing the operating cost of the system. This self-powered mode also reduces the demand for external power supply, improves the independence and portability of the system. The four-dimensional correlation analysis module performs correlation analysis on the database of cable force distribution in the entire area of the flexible support and the wind load data, and establishes a four-dimensional correlation equation of "wind load-cable force-vibration-strain". The parameters of the correlation equation are optimized in real time through the improved particle swarm algorithm, thereby improving the accuracy and efficiency of data analysis. Based on the four-dimensional correlation analysis module, the digital twin life prediction system can automatically trace the adjacent sensor data of the over-limit cable force point, and locate the damage position in combination with vibration spectrum analysis. This intelligent lifespan prediction and damage location function significantly improves the maintenance efficiency and safety of photovoltaic flexible supports. This invention integrates multiple functional modules to achieve full automation from data acquisition and processing to analysis and prediction. It can adapt to photovoltaic flexible supports of varying sizes and complexities, demonstrating excellent adaptability. Furthermore, this invention is scalable, allowing for the addition of additional sensors or functional modules based on actual needs.

[0031] In summary, this invention is the first to apply bridge magnetic flux sensing technology to the photovoltaic sector. Combining biomimetic design with aviation life models, this technology, unavailable in China, fills a gap in the field of global monitoring and life prediction for flexible photovoltaic supports. Furthermore, the system is priced at 800,000 yuan per unit, a 60% reduction in cost compared to imported solutions. The market for this system in wind power and bridge monitoring is expected to exceed 2 billion yuan by 2030. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 Schematic diagram of the distributed deployment of magnetic flux sensor arrays on steel cables.

[0034] Figure 2 It is a cross-sectional view of the honeycomb packaging structure. DETAILED DESCRIPTION

[0035] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0036] In the description of the present invention, it should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0039] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0040] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] Example 1

[0042] The present invention provides a photovoltaic flexible support full-area dynamic sensing system, comprising:

[0043] The magnetic flux sensor array is used to monitor the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmit the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area;

[0044] Bionic packaging structure for flexible bracket strain, wind load monitoring and magnetic flux sensor life protection;

[0045] The piezoelectric self-powered module is used for flexible bracket vibration monitoring and vibration monitoring result transmission. The piezoelectric self-powered module uses the flexible bracket vibration to generate electricity for the magnetic flux sensor. Therefore, the magnetic flux sensor does not need an additional power supply system and is maintenance-free for life.

[0046] The four-dimensional correlation analysis module is used to perform correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establish the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time through the improved particle swarm algorithm to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module;

[0047] The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces back to the data of three adjacent magnetic flux sensors and locates the damage position in combination with vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible brackets.

[0048] In this embodiment, if Figure 1 As shown, the magnetic flux sensor array is deployed at a density of 5 per meter. A nonlinear calibration curve based on magnetic permeability and cable force is used to verify and correct the consistency between the magnetic flux sensor array and cable force measurements, keeping the cable force measurement error within ±2%. The formula is: F = α·ΔB² + β·ΔB + γ, where F is the cable force; ΔB is the displacement or deformation of the cable; α and β reflect the coupling effect between material properties and the environment; and γ is the initial installation tension. α = 0.032, β = -1.28, and γ = 15.6.

[0049] Among them, the working principle of the magnetic flux sensor is based on the magnetoelastic effect of ferromagnetic materials, that is, when the ferromagnetic material is subjected to changes in external mechanical load, its internal magnetization intensity (magnetic permeability) will also change accordingly. By measuring the change in the magnetic permeability of a component made of ferromagnetic material, the stress to which the component is subjected can be accurately determined. There are many types of magnetic flux sensors, including but not limited to: Hall effect sensor: Using the Hall effect principle, the influence of the magnetic field on the current in the semiconductor material is measured to determine the strength of the magnetic field. Magnetoresistive sensor: Based on the magnetoresistive effect, when a magnetic field acts on a conductor, the resistance of the conductor changes, and the strength of the magnetic field is determined by measuring the change in resistance. Fluxgate sensor: Using the fluxgate principle, the strength of the magnetic field is determined by measuring the influence of the magnetic field on an oscillating circuit of a specific frequency. Fluxgate sensors can detect very weak magnetic fields and are suitable for special applications such as scientific experiments, military, and traffic monitoring.

[0050] In this embodiment, the bionic packaging structure enables the magnetic flux sensor to maintain an accuracy attenuation rate of <3% under conditions of a wind speed of 15 m / s and a dust concentration of 200 mg / m 3 .

[0051] In this embodiment, the digital twin life prediction system includes a full-scale 3D visualization of the flexible photovoltaic power station and a four-dimensional real-time monitoring and simulation prediction process based on wind load, cable force, vibration, and strain. This simulation and prediction process incorporates a modified Miner criterion. This modified Miner criterion incorporates a loading sequence factor to adjust damage calculations based on the loading sequence at different stress levels. It is assumed that damage accumulation is faster at high stress levels and slower at low stress levels.

[0052] In this embodiment, the global dynamic perception system supports AR visualization, allowing operators to view real-time stress cloud maps through HoloLens glasses. The global dynamic perception system is an advanced system that integrates multiple sensors and data analysis technologies, capable of real-time monitoring and perception of various physical quantities such as stress, temperature, and vibration. When combined with augmented reality (AR) technology, this system provides operators with an unprecedented visualization experience, particularly for viewing real-time stress cloud maps.

[0053] In this embodiment, the vibration spectrum analysis adopts a resolution of 0.1 Hz.

[0054] Example 2

[0055] like Figure 2 As shown, the present invention provides a photovoltaic flexible bracket full-area dynamic sensing system, comprising:

[0056] 1. Magnetic flux-bionic coupling sensing device (the first set of equipment in China)

[0057] Magnetic flux cable tension dynamic calibration technology: Based on the magnetic flux principle used in bridge cable monitoring, this innovatively designed miniaturized magnetoelastic sensor array (size ≤ 5cm3) is embedded and installed at 20cm intervals along the cable axis. This technology uses changes in magnetic permeability to invert the global cable tension distribution in real time (accuracy ±0.5kN), breaking through the limitations of traditional point-based measurement.

[0058] Bionic anti-interference packaging: The honeycomb titanium alloy shell (bionic design) is embedded with an electromagnetic shielding layer and a self-cleaning coating, which enables the sensor to maintain an accuracy attenuation rate of <3% under conditions of wind speed of 15m / s and dust concentration of 200mg / m3.

[0059] Self-powered design: integrated piezoelectric fiber (mimicking the lateral line organ of fish) uses bracket vibration to generate electricity, making the sensor maintenance-free throughout its life.

[0060] 2. Global Dynamic Correlation Analysis Algorithm

[0061] Multi-physics coupling modeling: Establishing the four-dimensional correlation equation of "wind load-cable force-vibration-strain" and optimizing model parameters in real time through an improved particle swarm algorithm;

[0062] Abnormal tracing technology: When the cable tension at a certain point exceeds the limit, it automatically traces back to the data of three adjacent sensors and locates the damage position in combination with vibration spectrum analysis (resolution 0.1Hz), reducing the false alarm rate to less than 1%.

[0063] 3. Digital Twin-Driven Lifespan Prediction Model

[0064] Damage accumulation algorithm: Miner's linear cumulative damage theory used in the life prediction of aero-engine blades is introduced to construct the flexible bracket fatigue damage index FDI (Fatigue Damage Index). The calculation formula is:

[0065]

[0066] Where n is the actual number of cycles experienced; Δσ is the stress amplitude, m = 3.5 (flexible support material constant), N i is the number of failure cycles under the corresponding stress level (obtained from the stress-life curve); C = 2 × 10^12 (experimental calibration value);

[0067] Digital twin platform: Develop a three-dimensional bracket visualization system based on the Unity3D engine, mapping stress hotspots in real time and predicting remaining life with an error of ≤5%.

[0068] Example 3

[0069] The present invention provides a life prediction method for a photovoltaic flexible bracket global dynamic sensing system, comprising:

[0070] The magnetic flux sensor array monitors the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmits the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area;

[0071] Bionic packaging structure protects flexible bracket strain, wind load monitoring and magnetic flux sensor life;

[0072] The piezoelectric self-powered module transmits the vibration monitoring and vibration monitoring results of the flexible bracket, and uses the vibration of the flexible bracket to generate electricity for the magnetic flux sensor;

[0073] The four-dimensional correlation analysis module performs correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establishes the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and uses the improved particle swarm algorithm to optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module;

[0074] The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces back to the data of the three adjacent magnetic flux sensors and locates the damage position in combination with vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible brackets.

[0075] In this embodiment, the magnetic flux sensor array uses a magnetic permeability-cable force nonlinear calibration curve to verify and correct the consistency between the magnetic flux sensor array and the cable force measurement, so that the cable force measurement error is controlled within ±2%.

[0076] In this embodiment, the bionic packaging structure enables the magnetic flux sensor to maintain an accuracy attenuation rate of <3% under the conditions of a wind speed of 15 m / s and a dust concentration of 200 mg / m3.

[0077] Example 4

[0078] Sensor deployment

[0079] On the main cable of the flexible support with a single span length of 80m, 120 magnetic flux sensors are deployed at intervals of 20cm. Each sensor group contains an X / Y / Z three-axis detection unit with a sampling frequency of 1kHz. The data is wirelessly transmitted to the edge computing gateway via LoRa.

[0080] Lifespan prediction verification

[0081] A photovoltaic power station in a northwest wind zone was selected. After six months of continuous monitoring, the system predicted that the remaining life of a certain span was 8.2 years. After disassembly and testing, the actual remaining life was 8.5 years, with a relative error of 3.5%.

[0082] This embodiment, the first application of bridge magnetic flux sensing technology to the photovoltaic field, combines biomimetic design with aviation life models. This unmatched domestic technology fills a gap in the field of global monitoring and life prediction for photovoltaic flexible supports. Furthermore, the system is priced at 800,000 yuan per unit, a 60% reduction in cost compared to imported solutions. The market for this system in wind power and bridge monitoring is expected to exceed 2 billion yuan by 2030.

[0083] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0084] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic flexible support global dynamic sensing system, characterized in that: include: The magnetic flux sensor array is used to monitor the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmit the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area; Bionic packaging structure for flexible bracket strain, wind load monitoring and magnetic flux sensor life protection; A piezoelectric self-powered module is used for flexible bracket vibration monitoring and vibration monitoring result transmission, and the piezoelectric self-powered module utilizes the flexible bracket vibration to generate electricity for the magnetic flux sensor; The four-dimensional correlation analysis module is used to perform correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establish the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time through the improved particle swarm algorithm to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module; The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces the data of three adjacent magnetic flux sensors and locates the damage position based on vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible supports.

2. A photovoltaic flexible bracket global dynamic sensing system according to claim 1, characterized in that: The deployment density of the magnetic flux sensor array is 5 per meter. The magnetic permeability-cable force nonlinear calibration curve is used to verify and correct the consistency between the magnetic flux sensor array and the cable force measurement. The cable force measurement error is controlled within ±2%. The formula is: F = α·ΔB2+β·ΔB+γ, where F is the cable force; ΔB is the displacement or deformation change of the cable; α and β reflect the coupling effect of material properties and the environment; γ is the initial installation tension.

3. A photovoltaic flexible support global dynamic sensing system according to claim 2, characterized in that: α=0.032, β=-1.28, γ=15.

6.

4. A photovoltaic flexible bracket global dynamic perception system and life prediction method according to claim 1, characterized in that: The bionic packaging structure enables the magnetic flux sensor to maintain an accuracy attenuation rate of <3% under conditions of wind speed of 15m / s and dust concentration of 200mg / m3.

5. The photovoltaic flexible support global dynamic sensing system according to claim 1, characterized in that: The digital twin life prediction system includes a full-area three-dimensional real-life view of the flexible photovoltaic power station and a four-dimensional real-time monitoring and simulation prediction process based on "wind load, cable force, vibration, and strain." A modified Miner criterion is introduced into the simulation prediction process.

6. The photovoltaic flexible support global dynamic sensing system according to claim 1, characterized in that: The global dynamic perception system supports AR visualization, and operation and maintenance personnel can view real-time stress cloud maps through Hololens glasses.

7. The photovoltaic flexible support global dynamic sensing system according to claim 1, characterized in that: The vibration spectrum analysis adopts a resolution of 0.1 Hz.

8. The life prediction method of the photovoltaic flexible support global dynamic sensing system according to claim 1 is characterized in that: include: The magnetic flux sensor array monitors the cable force distribution, strain, and vibration spectrum of the photovoltaic flexible support in real time, and transmits the monitoring results to the digital twin life prediction system in real time to form a database of the cable force distribution of the flexible support in the whole area; Bionic packaging structure protects flexible bracket strain, wind load monitoring and magnetic flux sensor life; The piezoelectric self-powered module transmits the vibration monitoring and vibration monitoring results of the flexible bracket, and uses the vibration of the flexible bracket to generate electricity for the magnetic flux sensor; The four-dimensional correlation analysis module performs correlation analysis on the flexible support global cable force distribution database and the wind load data obtained by monitoring the bionic packaging structure, establishes the "wind load-cable force-vibration-strain" four-dimensional correlation equation, and uses the improved particle swarm algorithm to optimize the parameters of the "wind load-cable force-vibration-strain" four-dimensional correlation equation in real time to obtain the "wind load-cable force-vibration-strain" four-dimensional correlation analysis module; The digital twin life prediction system is based on the four-dimensional correlation analysis module of "wind load-cable force-vibration-strain". When the system detects that the cable force at a certain point exceeds the limit, it automatically traces back to the data of three adjacent magnetic flux sensors and locates the damage position based on vibration spectrum analysis, thereby achieving the purpose of predicting the life of photovoltaic flexible supports.

9. The life prediction method of a photovoltaic flexible support global dynamic sensing system according to claim 8, characterized in that: The magnetic flux sensor array uses a magnetic permeability-cable force nonlinear calibration curve to verify and correct the consistency between the magnetic flux sensor array and the cable force measurement, so that the cable force measurement error is controlled within ±2%.

10. The life prediction method of a photovoltaic flexible support global dynamic sensing system according to claim 8, characterized in that: The bionic packaging structure enables the magnetic flux sensor to maintain an accuracy attenuation rate of less than 3% under conditions of wind speed of 15m / s and dust concentration of 200mg / m3.

Images