Wind vibration monitor and directional accurate monitoring, perception and early warning system for wind-induced vibration of cable-stayed bridges

Abstract

The present invention belongs to the field of bridge engineering, and specifically relates to a wind vibration monitor and a precise, directional monitoring, perception, and early warning system for wind-induced vibrations in cable-stayed bridges. The system comprises two sets of cable mounting members, two sets of mounting brackets, two sets of first magnets, and a piezoelectric patch. The two sets of cable mounting members are spaced apart along the axial direction of the cables, the two sets of mounting brackets are respectively mounted on the two sets of cable mounting members and are arranged oppositely along the axial direction of the cables, the two sets of first magnets are respectively connected to the two sets of mounting brackets and are arranged oppositely along the radial direction of the cables, the piezoelectric patch is located between the two sets of first magnets and between the two sets of mounting brackets, springs are respectively provided between the piezoelectric patch and the corresponding mounting brackets on either side of the piezoelectric patch along the axial direction of the cables, and a set of second magnets is respectively provided on either side of the piezoelectric patch along the radial direction of the cables. Based on signal recognition, the piezoelectric effect, and cloud computing technologies, the present invention improves the monitoring accuracy of bridges under the influence of wind loads and enables cluster monitoring and linkage feedback of cable-stayed bridges through a cloud computing monitoring platform.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering, and in particular relates to a wind vibration monitor and a directional and precise monitoring, perception and early warning system for wind-induced vibration of a cable-stayed bridge. Background Art

[0002] With rapid economic and social development, the need to bridge barriers like bays and straits is increasing, and bridge construction is expanding from inland to offshore. However, compared to inland bridges, offshore bridges face complex and severe wind environments. Wind effects on bridges are constrained by the natural characteristics of the wind, the structural dynamics, and the interaction between the wind and the structure. Due to the undulating terrain and the influence of various buildings, the speed, direction, and spatial distribution of near-surface winds are both time-varying and random. When this pulsating wind flows over non-streamlined bridge structures, it generates vortices and flow separation, creating complex aerodynamic forces. These forces can cause bridge vibrations, which in turn alter the flow field. This interactive mechanism further complicates the problem. Wind loads can pose a significant structural risk to cable-stayed bridges, making it imperative to develop technologies to monitor the effects of wind loads on bridges.

[0003] The piezoelectric effect refers to the phenomenon in which certain dielectrics, when deformed by an external force in a certain direction, undergo internal polarization, resulting in the appearance of opposite charges on their two opposing surfaces. Therefore, piezoelectric patches can be used to monitor the deformation of cables in cable-stayed bridges, and thus the degree of wind load.

[0004] Cloud computing technology is a form of distributed computing that involves breaking down massive data processing programs into countless smaller programs via a network called the "cloud." These programs are then processed and analyzed by a system of multiple servers, generating results that are then returned to the user. The core concept of cloud computing is to provide fast and secure cloud computing services and data storage on a website, centered around the internet. This allows anyone with internet access to the vast computing resources and data centers available online. In this application, the cloud computing platform can enable the aggregation of early warning data and interactive feedback for the cable-stayed bridge cluster.

[0005] Current technologies for monitoring wind-induced vibrations in cable-stayed bridges include GPS and spatial displacement and vibration monitoring. However, these technologies still require improvement. GPS uses satellite cloud images to detect wind conditions near cable-stayed bridges and issues early warnings based on parameters such as wind speed and direction. However, this technology suffers from inaccurate positioning of the bridge relative to the wind field and slow real-time updates. Spatial displacement and vibration monitoring technologies place sensors on the bridge deck or main beam, making it difficult to distinguish between vehicle-induced and wind-induced vibrations.

[0006] Compared with the existing wind-induced vibration monitoring technology for cable-stayed bridges, the present invention focuses on improving the monitoring accuracy of wind-induced vibrations and realizing the linkage feedback of cable-stayed bridge clusters. The present invention designs a new structure to install piezoelectric patches, which reduces the axial deformation of the piezoelectric patches and retains the lateral deformation of the piezoelectric patches. The present invention writes the vehicle-bridge coupling equation in the data analysis chip, calculates the voltage signal caused by the vehicle-induced vibration, and separates the vehicle-induced voltage signal from the collected voltage signal in the data revision chip, which can realize the function of improving the wind-induced vibration monitoring accuracy. Multiple sensors on multiple cables can comprehensively and completely calculate the impact of wind loads on cable-stayed bridges. Based on the cloud computing monitoring platform and the wireless signal transmission of 5G communication base stations, the high-timeliness transmission of bridge monitoring signals can be realized, so that feedback can be made in time, effectively improving the efficiency of early warning and maintenance. Based on the photovoltaic panels outside the wind vibration monitor and the batteries inside the wind vibration monitor, the wind vibration detector can be self-sufficient in electricity. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution for a wind vibration monitor and a directional and precise monitoring, perception and early warning system for wind-induced vibrations of a cable-stayed bridge.

[0008] The present invention provides a wind vibration monitor, which is installed on a cable and includes two groups of cable mounting parts, two groups of mounting brackets, two groups of first magnets and piezoelectric patches. The two groups of cable mounting parts are arranged at intervals along the axial direction of the cable, and the two groups of mounting brackets are respectively arranged on the two groups of cable mounting parts and arranged opposite to each other along the axial direction of the cable. The two groups of first magnets are respectively connected to the two groups of mounting brackets and arranged opposite to each other along the radial direction of the cable. The piezoelectric patch is located between the two groups of first magnets and between the two groups of mounting brackets. Springs are respectively arranged between the piezoelectric patch and the corresponding mounting brackets on both sides of the axial direction of the cable. A group of second magnets are respectively arranged on both sides of the piezoelectric patch along the radial direction of the cable. The second magnets are arranged opposite to the first magnets on the corresponding side, and the opposite first magnets and second magnets repel each other. The piezoelectric patch converts the deformation caused by the vibration of the cable into a voltage signal.

[0009] Furthermore, it also includes a shell component that covers the cable mounting part, the mounting bracket, the first magnet and the piezoelectric patch.

[0010] Furthermore, the cable mounting piece is a clamp structure.

[0011] Furthermore, the mounting bracket is an L-shaped structure, which includes an axial portion corresponding to the axial direction of the cable and a radial portion corresponding to the radial direction of the cable, and the first magnet is connected to the axial portion of the mounting bracket.

[0012] Furthermore, the wind vibration monitor also includes a photovoltaic panel and a battery. The photovoltaic panel converts solar energy into electrical energy, and the battery stores the electrical energy converted by the photovoltaic panel.

[0013] The present invention also provides a directional and precise monitoring, perception and early warning system for wind-induced vibration of a cable-stayed bridge, comprising a data acquisition unit, a data analysis unit, a data revision unit, a cloud computing monitoring platform, an alarm and the wind-induced vibration monitor as described above;

[0014] The data acquisition unit collects the voltage signal generated by the piezoelectric patch and transmits it to the data analysis unit;

[0015] The data analysis unit analyzes and processes the voltage signal and transmits the analyzed voltage signal to the data revision unit;

[0016] The data revision unit sets a threshold value according to the voltage signal;

[0017] The cloud computing monitoring platform determines whether there is danger based on the relationship between the voltage signal and the threshold, monitors the safety of the cable-stayed bridge cluster, and arranges vehicle diversion and maintenance tasks in advance;

[0018] The alarm device issues an alarm according to the instruction of the data revision unit.

[0019] Furthermore, it also includes a vehicle monitoring device, which collects parameter data of the vehicle and transmits it to the data analysis unit. The parameter data includes one or more of vehicle speed, displacement, and mass.

[0020] Furthermore, it also includes a communication base station, which transmits the parameter data collected by the vehicle monitoring device to the data analysis unit and also transmits the alarm instruction to the alarm device.

[0021] Furthermore, the data acquisition unit, the data analysis unit and the data revision unit are all arranged in the wind vibration monitor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Based on signal recognition, the piezoelectric effect, and cloud computing technologies, the present invention improves the monitoring accuracy of bridges affected by wind loads, as well as the monitoring and coordinated feedback functions of cable-stayed bridge clusters through a cloud computing monitoring platform. Compared with existing wind-induced vibration monitoring technologies for cable-stayed bridges, the present invention focuses on improving the monitoring accuracy of wind-induced vibrations and achieving coordinated feedback for cable-stayed bridge clusters. The present invention designs a novel structure for mounting piezoelectric patches, minimizing the axial deformation of the piezoelectric patches while retaining the deformation of the piezoelectric patches in the vertical direction of the cables. The present invention compiles vehicle-bridge coupling equations in the data analysis unit to calculate the voltage signal caused by vehicle-induced vibrations, and then removes the vehicle-induced voltage signal from the collected voltage signal in the data revision unit, thereby improving the accuracy of wind-induced vibration monitoring. Wireless signal transmission based on the cloud computing monitoring platform and communication base stations enables the timely transmission of bridge monitoring signals, enabling timely feedback and effectively improving the efficiency of early warning and maintenance. The wind vibration monitor's external photovoltaic panels and internal batteries enable the wind vibration detector to be self-sufficient in electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a directional and precise monitoring, perception and early warning system for wind-induced vibrations of a cable-stayed bridge according to the present invention;

[0025] Figure 2 This is a circuit diagram of a wind vibration monitor in a directional and precise monitoring, perception and early warning system for wind-induced vibrations of a cable-stayed bridge according to the present invention;

[0026] Figure 3 This is a cross-sectional view of a wind-induced vibration monitor in a directional and precise monitoring, perception, and early warning system for wind-induced vibrations of a cable-stayed bridge according to the present invention;

[0027] Figure 4 This is a schematic diagram of the installation structure of a piezoelectric patch in a directional and precise monitoring, perception and early warning system for wind-induced vibrations of a cable-stayed bridge according to the present invention;

[0028] Figure 5 This is a schematic diagram of the operation of a cable-stayed bridge wind-induced vibration directional accurate monitoring, perception and early warning system according to the present invention when a vehicle passes through the cable-stayed bridge;

[0029] Figure 6 This is a schematic diagram of the operation of a cable-stayed bridge wind-induced vibration directional accurate monitoring, perception and early warning system according to the present invention when no vehicle is passing through the cable-stayed bridge;

[0030] Figure 7 This is a circuit diagram of a directional and precise monitoring, perception and early warning system for wind-induced vibrations of a cable-stayed bridge according to the present invention.

[0031] In the figure: 1-cable; 2-upper unit; 3-lower unit; 4-photovoltaic panel; 5-communication base station; 6-warning device; 7-vehicle monitoring device; 8-data acquisition unit; 9-data analysis unit; 10-data revision unit; 11-piezoelectric patch; 12-battery; 13-mounting bracket; 14-first magnet; 15-second magnet; 16-spring; 17-cable mounting part; 18-cloud computing monitoring platform. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

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

[0034] See also Figure 1-7 A directional and precise monitoring, perception and early warning system for wind-induced vibration of a cable-stayed bridge includes a communication base station 5, a vehicle monitoring device 7, a data acquisition unit 8, a data analysis unit 9, a data revision unit 10, a cloud computing monitoring platform 18, an alarm 6 and a wind vibration monitor.

[0035] The wind vibration monitor is installed on the cable 1, which includes two cable mounting parts 17, two mounting brackets 13, two first magnets 14 and a piezoelectric patch 11. The two cable mounting parts 17 are arranged at intervals along the axial direction of the cable 1. The cable mounting part 17 is a clamp structure, which is clamped on the cable 1 by bolts. The two mounting brackets 13 are respectively arranged on two groups of cable mounting parts 17 and are arranged opposite to each other along the axial direction of the cable 1. The two first magnets 14 are both square plate-shaped permanent magnets, which are respectively connected to the two mounting brackets 13 and are radially opposite to each other along the cable 1. For the setting, the piezoelectric patch 11 is located between the two first magnets 14 and between the two mounting brackets 13. A spring 16 is set between the piezoelectric patch 11 and the corresponding mounting bracket 13 on both sides of the axial direction of the cable 1. A second magnet 15 is set on both sides of the piezoelectric patch 11 along the radial direction of the cable 1. The second magnet 15 is a miniature plate-shaped permanent magnet, which is arranged opposite to the first magnet 14 in pairs, and the relative first magnet 14 and second magnet 15 repel each other. The piezoelectric patch 11 converts the deformation caused by the vibration of the cable 1 into a voltage signal.

[0036] The wind vibration monitor also includes a shell assembly that covers the cable mounting, mounting bracket, first magnet and piezoelectric patch. The shell assembly is divided into an upper unit 2 and a lower unit 3, both of which are made of special engineering plastic materials. The upper unit 2 and the lower unit 3 are fixed to the cable 1 with bolts, and a hollow design is adopted between the two.

[0037] Both mounting brackets 13 are L-shaped, comprising an axial portion corresponding to the axial direction of the cable 1 and a radial portion corresponding to the radial direction of the cable 1. The first magnet 14 is connected to the axial portion of the mounting bracket 13. The left and right mounting brackets 13 and the two first magnets 14 form a rectangular frame that encloses the piezoelectric patch 11.

[0038] Two pairs of first magnets 14 and second magnets 15, perpendicular to the cable 1, interact to position the piezoelectric patch 11 in the center of the structure. Spring 16 acts as a buffer for the piezoelectric patch 11 when the cable 1 vibrates axially, reducing axial deformation of the piezoelectric patch 11. Cable mounting member 17 is secured to the cable 1 with screws and is made of plastic. Mounting bracket 13 is secured to the first magnet 14 with threads and screws and is made of plastic. Second magnets 15 are secured to both sides of the piezoelectric patch 11.

[0039] The wind vibration monitor also includes an electrically connected photovoltaic panel 4 and a battery 12. The photovoltaic panel 4 converts solar energy into electrical energy, and the battery 12 stores the electrical energy converted by the photovoltaic panel 4. The photovoltaic panel 4 is arranged outside the shell assembly, and the battery 12 is installed in the hollow part of the shell assembly.

[0040] The data acquisition unit 8, the data analysis unit 9 and the data revision unit 10 are all arranged in the hollow portion of the housing assembly.

[0041] The data acquisition unit 8 collects the voltage signal generated by the piezoelectric patch 11 and transmits it to the data analysis unit 9 .

[0042] The data analysis unit 9 analyzes and processes the voltage signal and transmits it to the data revision unit 10. The data analysis unit 9 can also calculate the vehicle-induced voltage signal based on the vehicle-bridge coupling equation. The vehicle-induced voltage signal obtained by the data analysis unit 9 is transmitted to the data revision unit 10 via wired transmission.

[0043] The data revision unit 10 revises the voltage signal and time image, evaluates the threshold, constructs the revised data of multiple wind vibration monitors on multiple cables 1 into a wind vibration model of the cable bridge, and transmits the obtained integrated voltage signal to the cloud computing monitoring platform 18.

[0044] The cloud computing monitoring platform 18 determines whether there is danger based on the relationship between the voltage signal and the threshold, monitors the safety of the cable-stayed bridge cluster, and arranges vehicle diversion and maintenance tasks in advance.

[0045] The alarm device 6 issues an alarm according to the instruction of the data revising unit 10 .

[0046] Vehicle monitoring device 7 is well-known in the art and primarily comprises a speed camera and a load cell mounted on the bridge surface. When a vehicle is about to enter the bridge, it collects vehicle parameter data, including speed and mass, and transmits it to data analysis unit 9. Specifically, an archway is installed on the cable-stayed bridge, upon which the warning device 6 and the main body of vehicle monitoring device 7 are mounted.

[0047] The communication base station 5 is installed on the cable-stayed bridge, which transmits the parameter data collected by the vehicle monitoring device 7 to the data analysis unit 9, and also transmits the alarm instruction to the alarm device 6, thereby realizing the early warning and linkage feedback of the bridge cluster.

[0048] Among them, the piezoelectric patch 11, the data acquisition unit 8, the data analysis unit 9 and the data revision unit 10 are electrically connected in sequence. The data acquisition unit 8, the data analysis unit 9 and the data revision unit 10 are all chip structures. The vehicle monitoring device 7 and the data revision unit 10 respectively realize wireless communication with the communication base station 5 through wireless communication technology, which can be specifically a 4G chip or a 5G chip.

[0049] by Figure 1 , 5, 7 as examples to explain the working process of the wind-induced vibration directional precise monitoring, perception and early warning system for cable-stayed bridges when a vehicle passes by:

[0050] When a vehicle passes through a cable-stayed bridge in windy conditions, the cable 1 of the cable-stayed bridge will produce axial and lateral displacements. The first magnet 14 in the wind vibration monitor will be displaced due to the radial displacement of the cable 1, and the piezoelectric patch 11 in the wind vibration monitor will be deformed due to the unbalanced force, thereby generating a voltage signal. The effect of the axial displacement of the device on the piezoelectric patch 11 is reduced by the action of the internal spring 16. The voltage signal is collected in the data acquisition unit 8. The voltage signal is then transmitted to the data analysis unit 9 by wire. The relevant parameters of the vehicle are transmitted from the vehicle monitoring device 7 to the data analysis unit 9 through the communication base station 5. The vehicle-bridge coupling equation is combined inside the data analysis unit 9 to calculate the vehicle-induced voltage signal and transmit it to the data revision unit 10. In the data revision unit 10, the vehicle-induced voltage signal is stripped off and a threshold is set. Based on the revised data, multiple wind vibration monitors on multiple cables synthesize the voltage signal of the cable-stayed bridge affected by wind vibration and transmit it to the alarm 6 and the cloud computing monitoring platform 18 through the communication base station 5. The cloud computing monitoring platform 18 determines whether there is danger based on the relationship between the voltage signal and the threshold, monitors the safety of the cable-stayed bridge cluster, and arranges vehicle diversion and maintenance tasks in a timely manner. When the voltage is higher than the threshold, the data revision unit 10 sends an instruction to the alarm 6, and the alarm 6 issues an alarm.

[0051] by Figure 1 , 6, 7 as examples to explain the working process of the wind-induced vibration directional precise monitoring, perception and warning system for the cable-stayed bridge in the absence of a vehicle passing. The cable 1 of the cable-stayed bridge will produce lateral displacement. The first magnet 14 in the wind vibration monitor will be displaced due to the radial displacement of the cable 1, and the piezoelectric patch 11 in the wind vibration monitor will be deformed due to the unbalanced force, thereby generating a voltage signal. The voltage signal is collected in the data acquisition unit 8. The voltage signal is then transmitted to the data analysis unit 9 by wire. The data analysis unit 9 does not need to calculate the vehicle-bridge coupling equation for analysis, and directly transmits it to the data revision unit 10. In the data revision chip 10, a threshold is set. Multiple wind vibration monitors on multiple cables obtain the voltage signal of the cable-stayed bridge affected by wind vibration based on the revised data, and transmit it to the alarm 6 and the cloud computing monitoring platform 18 through the communication base station 5. The cloud computing monitoring platform 18 determines whether there is danger based on the relationship between the voltage signal and the threshold, monitors the safety of the cable-stayed bridge cluster, and arranges vehicle diversion and maintenance tasks in advance. When the voltage is higher than the threshold, the data revision unit 10 sends an instruction to the alarm 6, and the alarm 6 issues an alarm.

[0052] by Figure 2 Taking the example of a cable-stayed bridge wind-induced vibration directional precision monitoring, perception, and early warning system, the internal wiring layout is explained. The photovoltaic panels 4 and the battery 12 work together to keep the wind vibration monitor functioning properly, and the photovoltaic panels 4 can charge the battery 12.

[0053] by Figure 3 , 4 is used as an example to explain the internal structure and layout of the precise directional monitoring, perception and early warning system for wind-induced vibrations in cable-stayed bridges. A hollow structure is located between the upper unit 2 and the lower unit 3. On one side of the hollow structure are placed the data acquisition unit 8, data analysis unit 9, battery 12, and data revision unit 10, in sequence. These components are fixed to the structure with fixing plates, nuts, and bolts to prevent the wires from becoming tangled within the monitor. Wind vibrations on the cable 1 primarily manifest as displacements perpendicular to the cable, while vehicle-induced vibrations on the cable 1 primarily manifest as displacements along the cable. On the other side of the hollow structure is a special structure for mounting a piezoelectric patch 11. Four springs 16 are installed along the cable 1. A first magnet 14 and a second magnet 15 on the piezoelectric patch 11 face each other perpendicular to the cable 1, placing the piezoelectric patch 11 in the center of the special structure and reducing the axial deformation of the piezoelectric patch 13, thereby improving the accuracy of wind vibration monitoring.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind vibration monitor, mounted on a cable (1), characterized in that: The invention comprises two groups of cable mounting parts (17), two groups of mounting brackets (13), two groups of first magnets (14) and piezoelectric patches (11), wherein the two groups of cable mounting parts (17) are arranged at intervals along the axial direction of the cable (1), the two groups of mounting brackets (13) are respectively arranged on the two groups of cable mounting parts (17) and are arranged opposite to each other along the axial direction of the cable (1), the two groups of first magnets (14) are respectively connected to the two groups of mounting brackets (13) and are arranged opposite to each other along the radial direction of the cable (1), and the piezoelectric patches (11) are located between the two groups of first magnets (14). Between the two groups of mounting brackets (13), springs (16) are respectively arranged between the piezoelectric patch (11) and the corresponding mounting brackets (13) along the axial sides of the cable (1), and a group of second magnets (15) are respectively arranged on the piezoelectric patch (11) along the radial sides of the cable (1), the second magnets (15) are arranged opposite to the first magnets (14) on the corresponding sides, and the opposite first magnets (14) and second magnets (15) repel each other, and the piezoelectric patch (11) converts the deformation caused by the vibration of the cable (1) into a voltage signal.

2. A wind vibration monitor according to claim 1, characterized in that: It also includes a shell component that covers the cable mounting piece, the mounting bracket, the first magnet and the piezoelectric patch.

3. The wind vibration monitor according to claim 1, characterized in that: The cable mounting member (17) is a hoop structure.

4. The wind vibration monitor according to claim 1, characterized in that: The mounting bracket (13) is an L-shaped structure, comprising an axial portion corresponding to the axial direction of the cable (1) and a radial portion corresponding to the radial direction of the cable (1), and the first magnet (14) is connected to the axial portion of the mounting bracket (13).

5. The wind vibration monitor according to claim 1, characterized in that: The wind vibration monitor further comprises a photovoltaic panel (4) and a storage battery (12). The photovoltaic panel (4) converts solar energy into electrical energy, and the storage battery (12) stores the electrical energy converted by the photovoltaic panel (4).

6. A directional and precise monitoring, perception and early warning system for wind-induced vibration of cable-stayed bridges, characterized by: It comprises a data acquisition unit (8), a data analysis unit (9), a data revision unit (10), a cloud computing monitoring platform (18), an alarm (6), and the wind vibration monitor according to any one of claims 1 to 5; The data acquisition unit (8) acquires the voltage signal generated by the piezoelectric patch (11) and transmits it to the data analysis unit (9); The data analysis unit (9) analyzes and processes the voltage signal and transmits the voltage signal to the data revision unit (10); The data revision unit (10) sets a threshold value according to the voltage signal; The cloud computing monitoring platform (18) determines whether there is danger based on the relationship between the voltage signal and the threshold, monitors the safety of the cable bridge cluster, and arranges vehicle diversion and maintenance tasks in advance; The alarm device (6) issues an alarm according to the instruction of the data revision unit (10).

7. The cable-stayed bridge wind-induced vibration directional accurate monitoring, perception and early warning system according to claim 6 is characterized in that: The vehicle monitoring device (7) is also included. The vehicle monitoring device (7) collects parameter data of the vehicle and transmits it to a data analysis unit (9). The parameter data includes one or more of vehicle speed, displacement, and mass.

8. The cable-stayed bridge wind-induced vibration directional accurate monitoring, perception and early warning system according to claim 7 is characterized in that: It also includes a communication base station (5), which transmits parameter data collected by the vehicle monitoring device (7) to the data analysis unit (9) and also transmits an alarm instruction to the alarm device (6).

9. The cable-stayed bridge wind-induced vibration directional accurate monitoring, perception and early warning system according to claim 6 is characterized in that: The data acquisition unit (8), data analysis unit (9) and data revision unit (10) are all arranged in the wind vibration monitor.

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