Large-span flexible photovoltaic support cable force deformation on-line monitoring system

Abstract

The invention discloses an on-line monitoring system for cable force deformation of a large-span flexible photovoltaic support. The on-line monitoring system comprises a field data information acquisition layer, a data processing and communication layer and a man-machine interaction layer, the field data information acquisition layer comprises a first data acquisition module arranged on the flexible photovoltaic support; the second data acquisition module is arranged on a meteorological station; the industrial area-array camera is arranged on one side of the flexible photovoltaic support; the data processing and communication layer is in communication connection with the field data information acquisition layer; and the man-machine interaction layer is in communication connection with the data processing and communication layer. According to the on-line monitoring system, real-time on-line monitoring of all parts of the flexible photovoltaic support is achieved, the safety of a power station is guaranteed, the operation and maintenance efficiency is improved, the power generation income is increased, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic support monitoring technology, and in particular to an online monitoring system for cable force and deformation of a large-span flexible photovoltaic support. Background Technology

[0002] Flexible photovoltaic (PV) support systems utilize flexible components such as high-strength, low-relaxation prestressed galvanized steel strands and wire ropes, rather than traditional rigid steel structures, as the primary load-bearing and support structure. Their core feature is the use of prestressing technology, where high-strength, low-relaxation prestressed galvanized steel strands are tensioned to form a stable spatial cable net structure, thereby fixing and installing PV modules. They can be widely applied in various complex and unfavorable terrains such as deserts, fishponds, orchards, Gobi deserts, tidal flats, and saline-alkali land, enabling multi-scenario applications such as agricultural-photovoltaic integration, forestry-photovoltaic integration, and fishery-photovoltaic integration. They have broad application prospects in both centralized and distributed PV power plants, alleviating the problem of dwindling available land resources for PV applications.

[0003] However, during the operation and maintenance of flexible photovoltaic (PV) systems, it has been found that they are susceptible to external loads (wind, snow, rain, earthquakes, etc.) and natural environmental factors (temperature, humidity, radiation, etc.), leading to problems such as stress relaxation in the steel strands, wind-induced vibration response of PV modules, stress deformation of steel beams, and foundation settlement and tilting. These issues can further result in accidents such as microcracks in PV modules, reduced power generation of PV power plants, collapse of flexible PV system foundations, and safety hazards during system operation and maintenance. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide an online monitoring system for cable stress and deformation of large-span flexible photovoltaic support, which realizes real-time online monitoring of various parts of the flexible photovoltaic support, ensures power plant safety, improves operation and maintenance efficiency, increases power generation revenue and extends equipment life.

[0005] The present invention provides an online monitoring system for cable force and deformation of a large-span flexible photovoltaic support, comprising a field data information acquisition layer, a data processing and communication layer, and a human-computer interaction layer; The on-site data acquisition layer includes: The first data acquisition module is installed on the flexible photovoltaic support and is used to collect the cable force, deflection deformation and vibration amplitude during the operation of the flexible photovoltaic support. The second data acquisition module is located on the weather station and is used to collect meteorological information; An industrial area array camera is installed on one side of the flexible photovoltaic support to acquire image information of the flexible photovoltaic support; The data processing and communication layer is communicatively connected to the field data information acquisition layer, and is used to receive and upload the data collected by the field data information acquisition layer. The human-computer interaction layer is connected to the data processing and communication layer to store and analyze the received data and visualize it.

[0006] Furthermore, the flexible photovoltaic support includes parallel main cables, with end piles at both ends of the main cables, and end steel beams fixedly installed at the top of the end piles. The two ends of the main cables are connected to the end steel beams by prestressing tension. Several intermediate steel beams are fixedly connected to the main cables along their length, and intermediate piles are fixedly installed at the bottom of the intermediate steel beams. The adjacent end steel beams and middle steel beams, as well as the adjacent middle steel beams, are respectively connected by prestressed tensioning with stabilizing cables. Several triangular trusses are respectively set between the adjacent end steel beams and middle steel beams, as well as between the adjacent middle steel beams. The top of the triangular truss is fixedly connected to the main cable, and the bottom is fixedly connected to the stabilizing cable. An inclined tie pile is provided on the outer side of the end pile, and a steel structure foundation is fixedly provided on the top of the inclined tie pile. The steel structure foundation and the corresponding end steel beam are connected by a prestressed inclined cable.

[0007] Furthermore, clamps are fixedly installed on the end piles and the middle piles respectively, and the clamps on adjacent end piles and the clamps on adjacent middle piles are fixedly connected by diagonal tie rods respectively.

[0008] Furthermore, the first data acquisition module includes a magnetic flux cable force sensor, a dual-axis tilt sensor, a laser displacement sensor, a wireless vibration acceleration sensor, a surface strain gauge, a fiber optic displacement sensor, a differential pressure hydrostatic level, and a vibrating wire anchor stress gauge. The magnetic flux cable force sensors are symmetrically installed at both ends of the main cable anchoring tensioning; the dual-axis tilt sensor, laser displacement sensor and wireless vibration acceleration sensor are installed on the main cable; The magnetic flux cable force sensors are symmetrically installed at both ends of the stabilizing cable anchoring tension; the dual-axis tilt sensor, laser displacement sensor and wireless vibration acceleration sensor are installed on the stabilizing cable; The vibrating wire anchor stress gauges are symmetrically installed at both ends of the stay cable anchoring tensioning; the dual-axis tilt sensor, laser displacement sensor and wireless vibration acceleration sensor are installed on the stay cable; The surface strain gauge, biaxial tilt sensor and fiber optic displacement sensor are installed on both the end steel beam and the middle steel beam. The upper parts of the end piles, middle piles, and inclined piles are all equipped with the dual-axis tilt sensor, laser displacement sensor, wireless vibration acceleration sensor, and differential pressure hydrostatic level. The wireless vibration acceleration sensor is installed at the connection nodes of the stabilizing cable and the triangular truss, the connection points of the stay cable and the steel structure foundation, and the cantilever positions of the end steel beam and the middle steel beam.

[0009] Furthermore, the weather station is located on one side of the flexible photovoltaic support and includes a base; the base is fixedly installed on a concrete foundation by anchor bolts; a communication box is fixedly installed on the base; an installation rod is fixedly installed on the top of the base; a bent connector is fixedly installed on the installation rod; a communication antenna is fixedly installed on the bent connector; and an installation plate is fixedly installed on the top of the installation rod.

[0010] Furthermore, the second data acquisition module includes an anemometer, a solar radiation meter, and an ambient temperature and humidity meter; The anemometer is fixedly installed at one end of the mounting plate; the solar radiation meter is fixedly installed at the top of the mounting plate; the ambient temperature and humidity meter is fixedly installed at the top of the mounting plate; a lightning rod is fixedly installed at the top of the mounting plate and is electrically connected to the ground.

[0011] Furthermore, the industrial area array camera is mounted on one side of the triangular truss and fixedly supported by an independently configured support frame, and is used to acquire image information of the triangular truss.

[0012] Furthermore, the data processing and communication layer includes: The dynamic data acquisition and analysis system is communicatively connected to the field data information acquisition layer and is used to receive data acquired by the field data information acquisition layer. The high-speed industrial Internet of Things system communicates with the dynamic data acquisition and analysis system to upload data.

[0013] Furthermore, the human-computer interaction layer includes: A database server, which is communicatively connected to the data processing and communication layer, is used to store data; The computer center is connected in communication with the database server for data processing and analysis. Configuration software, installed in the computer center, is used to convert data into intuitive graphics, animations, curves, or reports.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention monitors the cable force, steel strand deflection and deformation, component wind-induced vibration frequency and amplitude, steel beam stress and displacement deformation, foundation settlement and meteorological information data in real time through the field data information acquisition layer. It comprehensively identifies all parameters of flexible photovoltaic support operation, and provides timely early warning and intervention when data is abnormal. It changes passive repair to active prevention, significantly reduces the risk of instability or even collapse of flexible support structure caused by wind vibration, etc., and makes the operation of large flexible photovoltaic power station safer and more controllable. (2) This invention realizes the precise implementation of online monitoring of flexible photovoltaic support, which not only reduces the reliance on large-scale manual inspections and optimizes the status of flexible support in a timely manner, thus improving power generation efficiency; but also provides remote and continuous real-time data for operation and maintenance personnel, providing a scientific basis for their decision-making, promoting the transformation of photovoltaic power station operation and maintenance from "human wave tactics" to intelligent, refined and scientific, and greatly improving management efficiency; (3) This invention collects and retains complete data of the entire life cycle of flexible photovoltaic brackets, and uses it for power generation trend prediction and traceability analysis of large flexible bracket photovoltaic power plants, providing long-term protection for the operation of photovoltaic power plants; based on data analysis, precise maintenance can effectively extend the service life of flexible photovoltaic brackets, significantly reduce the cost per kilowatt-hour of their entire life cycle, and significantly improve the economic benefits of photovoltaic power plants.

[0015] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0016] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural block diagram of an online monitoring system for cable stress and deformation of large-span flexible photovoltaic supports. Figure 2 This is a schematic diagram of the flexible photovoltaic support structure; Figure 3 This is a schematic diagram showing the sensor distribution at the top of the end pile; Figure 4 This is a schematic diagram showing the sensor distribution at the top of the central pile; Figure 5 This is a schematic diagram showing the sensor distribution at the top of the inclined cable pile; Figure 6 This is a schematic diagram of the structure of a weather station.

[0017] The diagram is labeled as follows: 1. On-site data acquisition layer; 2. Data processing and communication layer; 3. Human-computer interaction layer; 4. Flexible photovoltaic support structure; 5. Weather station; 6. Photovoltaic module; 11. Magnetic flux cable force sensor; 12. Dual-axis tilt sensor; 13. Laser displacement sensor; 14. Wireless vibration acceleration sensor; 15. Surface strain gauge; 16. Fiber optic grating displacement sensor; 17. Differential pressure hydrostatic level; 18. Vibrating wire anchor stress gauge; 19. Anemometer; 110. Solar radiation meter; 111. Ambient temperature and humidity meter; 41. Main cable; 42. End pile; 43. End steel beam; 44. Middle steel beam; 45. Middle pile; 46. Stabilizing cable; 47. Triangular truss; 48. Cable-stayed pile; 49. Steel structure foundation; 410. Cable-stayed cable; 411. Clamp; 412. Cable-stayed rod; 51. Base; 52. Communication box; 53. Mounting rod; 54. Bending connector; 55. Communication antenna; 56. Mounting plate; 57. Lightning rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figures 1-6 The present invention provides an online monitoring system for cable force deformation of a large-span flexible photovoltaic support, comprising a field data information acquisition layer 1, a data processing and communication layer 2, and a human-computer interaction layer 3; The on-site data acquisition layer includes: The first data acquisition module is installed on the flexible photovoltaic support 4 and is used to collect the cable force, deflection deformation and vibration amplitude during the operation of the flexible photovoltaic support 4. The second data acquisition module is located on weather station 5 and is used to collect meteorological information; An industrial area array camera is installed on one side of the flexible photovoltaic support 4 to acquire image information of the flexible photovoltaic support 4; Among them, the flexible photovoltaic support 4 includes a main cable 41 arranged in parallel, with end piles 42 set at both ends of the main cable 41, and an end steel beam 43 fixedly set at the top of the end piles 42. The two ends of the main cable 41 are connected to the end steel beam 43 by prestressing tension. Several intermediate steel beams 44 are fixedly connected to the main cable 41 along its length direction, and intermediate piles 45 are fixedly set at the bottom of the intermediate steel beams 44. Stabilizing cables 46 are prestressed and tensioned between adjacent end steel beams 43 and middle steel beams 44, as well as between adjacent middle steel beams 44. Several triangular trusses 47 are provided between adjacent end steel beams 43 and middle steel beams 44, as well as between adjacent middle steel beams 44. The top of the triangular truss 47 is fixedly connected to the main cable 41, and the bottom is fixedly connected to the stabilizing cable 46. An inclined tie pile 48 is provided on the outside of the end pile 42. A steel structure pier 49 is fixedly provided on the top of the inclined tie pile 48. An inclined cable 410 is prestressed between the steel structure pier 49 and the corresponding end steel beam 43. Clamps 411 are fixedly installed on the end piles 42 and the middle piles 45 respectively. The clamps 411 on adjacent end piles 42 and the clamps 411 on adjacent middle piles 45 are fixedly connected by diagonal tie rods 412 respectively. Preferably, the end piles 42, the middle piles 45 and the diagonal tie piles 48 are prestressed concrete PHC pipe piles. The first data acquisition module includes a magnetic flux cable force sensor 11, a dual-axis tilt sensor 12, a laser displacement sensor 13, a wireless vibration acceleration sensor 14, a surface strain gauge 15, a fiber optic grating displacement sensor 16, a differential pressure hydrostatic level 17, and a vibrating wire anchor cable stress gauge 18. Magnetic flux cable force sensors 11 are symmetrically installed at both ends of the main cable 41 for real-time online monitoring of the stress state and cable force of the main cable 41; a dual-axis tilt sensor 12 and a laser displacement sensor 13 are installed on the main cable 41 for real-time online monitoring of the tilt angle and deflection deformation of the main cable 41; a wireless vibration acceleration sensor 14 is installed on the main cable 41 for real-time online monitoring of the wind-induced vibration frequency and response amplitude of the main cable 41 under wind load. Magnetic flux cable force sensors 11 are symmetrically installed at both ends of the anchoring tension of the stabilizing cable 46 for real-time online monitoring of the stress state and cable force of the stabilizing cable 46; a dual-axis tilt sensor 12 and a laser displacement sensor 13 are installed on the stabilizing cable 46 for real-time online monitoring of the tilt angle and deflection deformation of the stabilizing cable 46; a wireless vibration acceleration sensor 14 is installed on the stabilizing cable 46 for real-time online monitoring of the wind-induced vibration frequency and response amplitude of the stabilizing cable 46 under wind load. Symmetrical vibrating wire anchor stress gauges 18 are installed at both ends of the stay cable 410 for real-time online monitoring of the stress state and cable force of the stay cable 410; a dual-axis tilt sensor 12 and a laser displacement sensor 13 are installed on the stay cable 410 for real-time online monitoring of the tilt angle and deflection deformation of the stay cable 410; a wireless vibration acceleration sensor 14 is installed on the stay cable 410 for real-time online monitoring of the wind-induced vibration frequency and response amplitude of the stay cable 410 under wind load. Surface strain gauges 15 are installed on both the end steel beam 43 and the middle steel beam 44 for real-time online monitoring of the strain and stress magnitude of the end steel beam 43 and the middle steel beam 44; biaxial tilt sensors 12 and fiber optic displacement sensors 16 are installed on both the end steel beam 43 and the middle steel beam 44 for real-time online monitoring of the stress deformation and displacement of the end steel beam 43 and the middle steel beam 44. The upper parts of the end piles 42, middle piles 45, and inclined tie piles 48 are all equipped with a dual-axis tilt sensor 12, a laser displacement sensor 13, a wireless vibration acceleration sensor 14, and a differential pressure static level 17. The dual-axis tilt sensor 12 and the laser displacement sensor 13 are used for real-time online monitoring of the tilt angle and lateral displacement of the end piles 42, middle piles 45, and inclined tie piles 48. The wireless vibration acceleration sensor 14 is used for real-time online monitoring of the vibration of the end piles 42, middle piles 45, and inclined tie piles 48 under the support load. The differential pressure static level 17 is used for real-time online monitoring of the settlement of the end piles 42, middle piles 45, and inclined tie piles 48. Wireless vibration acceleration sensors 14 are installed at the connection nodes of the stabilizing cable 46 and the triangular truss 47, the connection parts of the stay cable 410 and the steel structure pier 49, and the cantilever positions of the end steel beam 43 and the middle steel beam 44, for real-time online monitoring of the frequency and response amplitude of wind-induced vibration under wind load. The weather station 5 is located on one side of the flexible photovoltaic support 4 and includes a base 51. The base 51 is fixedly installed on the concrete foundation by anchor bolts. A communication box 52 is fixedly installed on the base 51. An installation rod 53 is fixedly installed on the top of the base 51. A bent connector 54 is fixedly installed on the installation rod 53. A communication antenna 55 is fixedly installed on the bent connector 54 for transmitting the key operating parameters of the flexible photovoltaic support 4 collected by the communication box 52 to the human-machine interface layer 3 and for receiving control commands from the human-machine interface layer 3. An installation plate 56 is fixedly installed on the top of the installation rod 53. The second data acquisition module includes an anemometer 19, a solar radiation meter 110, and an ambient temperature and humidity meter 111; An anemometer 19 is fixedly mounted on one end of the mounting plate 56 and is used to monitor the source direction and wind speed of wind load in real time online. The solar radiation meter 110 is fixedly installed on the top of the mounting plate 56 for real-time online monitoring of solar irradiance. An ambient temperature and humidity meter 111 is fixedly installed on the top of the mounting plate 56 for real-time online monitoring of ambient temperature and humidity; A lightning rod 57 is fixedly installed on the top of the mounting plate 56. The lightning rod 57 is electrically connected to the ground. Due to the high height of the meteorological station 5, the lightning current is actively guided to safely discharge into the ground through the lightning rod 57 to avoid damage to the equipment from lightning strikes. An industrial area array camera is mounted on one side of the triangular truss 47 and is fixedly supported by an independently set support frame, and is used to acquire image information of the triangular truss 47; An industrial area array camera takes high-speed photos of the triangular truss 47 to analyze the displacement response time history of the triangular truss 47 under wind load excitation, thereby obtaining the excitation frequency, period, and damping ratio of the flexible photovoltaic support 4 and the triangular truss 47, and comparing them with the vibration characteristic parameters such as the natural frequency of the flexible photovoltaic support 4. If the excitation frequency of the flexible photovoltaic support 4 is close to its natural frequency under pulsating wind load, the flexible photovoltaic support 4 has a risk of resonance failure, and the system issues an early warning to the operation and maintenance personnel. The data processing and communication layer 2 communicates with the field data acquisition layer 1, including: The dynamic data acquisition and analysis system is connected to the field data information acquisition layer 1 and is used to receive data acquired by the field data information acquisition layer 1. A high-speed industrial IoT system communicates with a dynamic data acquisition and analysis system to upload data; The human-computer interaction layer 3 communicates with the data processing and communication layer 2, including: The database server, which communicates with the data processing and communication layer 2, is used to store data; The computer center communicates with the database server for data processing and analysis. Configuration software, installed in a computer center, is used to convert data into intuitive graphics, animations, curves, or reports.

[0021] In this embodiment, the online monitoring system consists of a field data acquisition layer 1, a data processing and communication layer 2, and a human-machine interaction layer 3. The field data acquisition layer 1 uses various types of sensors to measure parameters such as cable force, deflection deformation, and vibration amplitude during the operation of the flexible photovoltaic support 4. Then, the system acquires and summarizes the above key operating data through a dynamic data acquisition and analysis system, and transmits it to a database server and computer center for storage and analysis through a high-speed industrial Internet of Things system. The system then uses configuration software to visualize the above key operating data for maintenance personnel, making it easier for them to monitor the operation of the flexible photovoltaic support 4 using the online monitoring system. This reduces the reliance on large-scale manual inspections and improves power generation efficiency by optimizing the status of the flexible photovoltaic support 4. It provides maintenance personnel with remote, continuous, real-time data, providing a scientific basis for their decision-making, and promoting the transformation of photovoltaic power plant operation and maintenance from a "human wave" approach to intelligent, refined, and scientific management, significantly improving management efficiency. The online monitoring system of this application is an essential system for realizing intelligent operation and maintenance of photovoltaic power plants, especially large-scale flexible photovoltaic support power plants.

[0022] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An online monitoring system for cable force and deformation of a large-span flexible photovoltaic support, characterized in that, It includes a field data information acquisition layer (1), a data processing and communication layer (2), and a human-computer interaction layer (3); The on-site data information acquisition layer (1) includes: The first data acquisition module is set on the flexible photovoltaic support (4) and is used to collect the cable force, deflection deformation and vibration amplitude during the operation of the flexible photovoltaic support (4); The second data acquisition module is installed on the meteorological station (5) and is used to collect meteorological information; An industrial area array camera is installed on one side of the flexible photovoltaic bracket (4) to collect image information of the flexible photovoltaic bracket (4); The data processing and communication layer (2) is communicatively connected to the field data information acquisition layer (1) and is used to receive and upload the data collected by the field data information acquisition layer (1). The human-computer interaction layer (3) is connected to the data processing and communication layer (2) for storing and analyzing the received data and displaying it visually.

2. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 1, characterized in that, The flexible photovoltaic support (4) includes parallel main cables (41), with end piles (42) at both ends of the main cables (41), and end steel beams (43) fixedly installed at the top of the end piles (42). The two ends of the main cables (41) are connected to the end steel beams (43) by prestressing tension. Several intermediate steel beams (44) are fixedly connected to the main cables (41) along their length direction, and intermediate piles (45) are fixedly installed at the bottom of the intermediate steel beams (44). Stabilizing cables (46) are prestressed and tensioned between adjacent end steel beams (43) and middle steel beams (44), and between adjacent middle steel beams (44). Several triangular trusses (47) are provided between adjacent end steel beams (43) and middle steel beams (44), and between adjacent middle steel beams (44). The top of the triangular truss (47) is fixedly connected to the main cable (41), and the bottom is fixedly connected to the stabilizing cable (46). An inclined tie pile (48) is provided on the outside of the end pile (42), and a steel structure pier (49) is fixedly provided on the top of the inclined tie pile (48). The steel structure pier (49) and the corresponding end steel beam (43) are connected by a prestressed inclined cable (410).

3. The online monitoring system for cable force and deformation of large-span flexible photovoltaic support according to claim 2, characterized in that, The end piles (42) and the middle piles (45) are respectively fixedly provided with clamps (411), and the clamps (411) on adjacent end piles (42) and the clamps (411) on adjacent middle piles (45) are respectively fixedly connected by tie rods (412).

4. The online monitoring system for cable force and deformation of large-span flexible photovoltaic support according to claim 2, characterized in that, The first data acquisition module includes a magnetic flux cable force sensor (11), a dual-axis tilt sensor (12), a laser displacement sensor (13), a wireless vibration acceleration sensor (14), a surface strain gauge (15), a fiber optic grating displacement sensor (16), a differential pressure hydrostatic level (17), and a vibrating wire anchor stress gauge (18). The magnetic flux cable force sensor (11) is symmetrically installed at both ends of the anchoring tension of the main cable (41); the dual-axis tilt sensor (12), laser displacement sensor (13) and wireless vibration acceleration sensor (14) are installed on the main cable (41); The magnetic flux cable force sensor (11) is symmetrically installed at both ends of the anchoring tension of the stabilizing cable (46); the dual-axis tilt sensor (12), laser displacement sensor (13) and wireless vibration acceleration sensor (14) are installed on the stabilizing cable (46); The two ends of the stay cable (410) anchoring tension are symmetrically equipped with the vibrating wire anchor cable stress gauge (18); the stay cable (410) is equipped with the dual-axis tilt sensor (12), laser displacement sensor (13) and wireless vibration acceleration sensor (14); The surface strain gauge (15), biaxial tilt sensor (12) and fiber optic grating displacement sensor (16) are installed on both the end steel beam (43) and the middle steel beam (44); The upper parts of the end piles (42), middle piles (45) and inclined piles (48) are all equipped with dual-axis tilt sensors (12), laser displacement sensors (13), wireless vibration acceleration sensors (14) and differential pressure static level (17); The wireless vibration acceleration sensor (14) is installed at the connection nodes of the stabilizing cable (46) and the triangular truss (47), the connection points of the stay cable (410) and the steel structure pier (49), and the cantilever positions of the end steel beam (43) and the middle steel beam (44).

5. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 1, characterized in that, The weather station (5) is located on one side of the flexible photovoltaic support (4) and includes a base (51); the base (51) is fixedly installed on the concrete foundation by anchor bolts; a communication box (52) is fixedly installed on the base (51); an installation rod (53) is fixedly installed on the top of the base; a bent connector (54) is fixedly installed on the installation rod (53); a communication antenna (55) is fixedly installed on the bent connector (54); and an installation plate (56) is fixedly installed on the top of the installation rod (53).

6. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 5, characterized in that, The second data acquisition module includes an anemometer (19), a solar radiation meter (110), and an ambient temperature and humidity meter (111); The anemometer (19) is fixedly installed at one end of the mounting plate (56); the solar radiation meter (110) is fixedly installed at the top of the mounting plate (56); the ambient temperature and humidity meter (111) is fixedly installed at the top of the mounting plate (56); a lightning rod (57) is fixedly installed at the top of the mounting plate (56), and the lightning rod (57) is electrically connected to the ground.

7. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 2, characterized in that, The industrial area array camera is set on one side of the triangular truss (47) and fixedly supported by an independently set support frame, and is used to collect image information of the triangular truss (47).

8. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 1, characterized in that, The data processing and communication layer (2) includes: The dynamic data acquisition and analysis system is communicatively connected to the field data information acquisition layer (1) and is used to receive the data acquired by the field data information acquisition layer (1); The high-speed industrial Internet of Things system communicates with the dynamic data acquisition and analysis system to upload data.

9. The online monitoring system for cable force and deformation of a large-span flexible photovoltaic support according to claim 1, characterized in that, The human-computer interaction layer (3) includes: A database server, which is connected to the data processing and communication layer (2), is used to store data; The computer center is connected in communication with the database server for data processing and analysis. Configuration software, installed in the computer center, is used to convert data into intuitive graphics, animations, curves, or reports.

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