Bridge collapse accident flexible water curtain blocking system based on Beidou automatic monitoring

Abstract

The invention discloses a bridge collapse accident flexible water curtain blocking system based on Beidou automatic monitoring, which comprises an intelligent control terminal, a base, a water curtain device mounted on the base, a high-brightness laser projection device, a tweeter and a detection device, the water curtain device, the high-brightness laser projection device, the tweeter and the detection device are connected with the intelligent control terminal, and the intelligent control terminal receives accident warning information sent by the bridge monitoring and early warning system based on Beidou automatic monitoring and controls the water curtain device to form a water curtain barrier at a bridge entrance. The high-brightness laser projection device projects high-brightness laser displaying accident warning information on the water curtain barrier, meanwhile, the tweeter gives out alarm sound to prevent vehicles from entering the bridge, and the detection device collects bridge running state information and vehicle information in the bridge and uploads the information in real time. According to the invention, the barrier-free flexible blocking effect which is clear and visible from a long distance in all weathers in daytime or sunny days is realized, and the effect of effectively blocking vehicles at the bridge entrance is realized.

Description

Technical Field

[0001] This invention belongs to the field of bridge operation safety and intelligent emergency prevention and control technology, specifically referring to a flexible water curtain barrier system for bridge collapse accidents based on Beidou automated monitoring. Background Technology

[0002] With the rapid expansion of transportation networks, bridges have become crucial links connecting various regions. Currently, influenced by numerous complex external factors, bridge-related safety accidents occur frequently. For example, for bridges spanning rivers, the increasing size and speed of shipping vessels and the continuous increase in vessel traffic have exacerbated the conflict between bridges and passing ships. The risk of heavy sand and gravel ships colliding with bridge beams and columns, leading to bridge deck fractures or even complete collapse, is increasing. Overpasses also face the risk of collisions from heavily loaded trucks veering off course, often resulting in varying degrees of damage to their piers and other critical structures. Even more serious is the fact that existing bridge accident monitoring methods are inadequate in the face of these complex and variable deformation conditions. Currently, the main methods for dynamic displacement monitoring of bridges both domestically and internationally include manual monitoring, accelerometers, and GNSS. Manual monitoring struggles to meet the requirements for high precision and real-time monitoring; accelerometers are effective at monitoring high-frequency vibrations of bridges, but less effective at monitoring low-frequency dynamic effects, and data transmission relies on cables, resulting in high installation costs and time consumption.

[0003] Furthermore, existing technologies are insufficient to provide timely and effective emergency warnings to vehicles and pedestrians outside the bridge. This allows vehicles and pedestrians to continue entering the bridge after an accident, potentially blocking escape routes, increasing the risk of people being trapped, and even leading to chain reactions such as cars falling off the bridge, causing more serious traffic accidents and resulting in greater casualties and property damage. Additionally, in the event of a sudden emergency, there is a lack of effective vehicle blocking measures at bridge entrances. Currently, traditional methods such as information boards, cones, and water-filled barriers are commonly used, but these methods have many shortcomings in practical application. While information boards can provide some information, they are easily overlooked due to their location, extreme weather conditions such as heavy fog, or driver inattention, thus failing to fully realize their intended purpose. Cones and water-filled barriers are often inconspicuous, lack strong warning effects, and are usually placed close to the accident scene, meaning drivers often don't have enough time to react when they see them, increasing the risk of secondary accidents. Some bridges have installed physical barriers such as barrier gates at the entrances, but these can easily collide with high-speed vehicles when the barriers are activated, causing serious accidents. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible water curtain barrier system for bridge collapse accidents based on Beidou automated monitoring, which can effectively block vehicles.

[0005] The objective of this invention is achieved through the following technical measures: a flexible water curtain barrier system for bridge collapse accidents based on BeiDou automated monitoring, characterized in that it includes an intelligent control terminal, a base, a water curtain device installed on the base, a high-brightness laser projection device, a loudspeaker, and a detection device. The water curtain device, high-brightness laser projection device, loudspeaker, and detection device are respectively connected to the intelligent control terminal. The intelligent control terminal receives accident warning information from the bridge monitoring and early warning system based on BeiDou automated monitoring and controls the water curtain device to form a water curtain barrier at the bridge entrance. The high-brightness laser projection device projects the accident warning information onto the water curtain barrier with a high-brightness laser, while the loudspeaker emits an alarm sound to prevent vehicles from entering the bridge. The detection device collects the bridge's operating status information and vehicle information within the bridge and uploads the information in real time.

[0006] When this invention receives an accident warning message from a bridge monitoring and early warning system based on BeiDou automated monitoring, it will form a dynamic water curtain at the bridge entrance and project the accident warning message onto the vehicle-facing surface at the bridge entrance using a high-brightness laser. This will create a virtual three-dimensional space, achieving an unobstructed and flexible barrier effect that is clearly visible from a distance, regardless of day or night. This effectively blocks vehicles at the bridge entrance, thus preventing serious consequences such as blocked escape routes, casualties, and property damage caused by vehicles and pedestrians still being able to enter the bridge after an accident.

[0007] The water curtain device, high-brightness laser projection device, loudspeaker, and detection device described in this invention are connected to the urban bridge information supervision platform via an intelligent control terminal to achieve one-click linkage.

[0008] The base of this invention is a gantry frame type. The water curtain device includes a water curtain generating device, a water pump, a water tank, and a wastewater recycling tank. The high-brightness laser projection device and the water curtain generating device are both located at the top of the base. The high-volume speaker and the detection device are located on the vertical support column of the base. The water pump's inlet end is connected to the water tank, and its outlet end is connected to the water curtain generating device. The wastewater recycling tank is located below the water curtain generating device and is used to receive the falling water and circulate it back to the water tank. A heater is provided inside the water tank.

[0009] The bridge monitoring and early warning system of this invention includes a base station, a data transmission system, multiple positioning monitoring points installed on the bridge, monitoring point data collectors, and a deformation monitoring platform. The monitoring point data collectors are connected to each positioning monitoring point through the data transmission system. The base station receives data transmitted from the BeiDou satellite and transmits the received data and its own coordinates to the monitoring point data collectors after correction. Each positioning monitoring point transmits the collected bridge data to the monitoring point data collectors. The monitoring point data collectors perform relative differential processing on the data transmitted from the BeiDou satellite and the coordinate data of the base station to obtain the deformation data of the positioning monitoring point relative to the base station, and transmit the deformation data to the deformation monitoring platform for analysis and display.

[0010] This invention relates to a bridge monitoring and early warning system based on BeiDou automated monitoring. Utilizing the BeiDou satellite navigation system and the BeiDou ground-based augmentation system, it can achieve real-time, millimeter-level monitoring of bridge deformation. Therefore, upon receiving information about emergency events such as bridge deck fractures or bridge collapses, this invention can promptly detect, respond to, and trigger on-site alarms. Based on my country's independently developed global satellite navigation system, this invention has advantages such as minimal weather-related impacts and low monitoring costs, while simultaneously meeting the accuracy requirements of both high-frequency and low-frequency measurements. This invention can provide rapid emergency response to monitoring data, improve the accuracy of disaster monitoring, and promptly issue red alerts when limits are exceeded, ensuring road traffic safety.

[0011] When the number of reference stations is sufficient, the bridge monitoring and early warning system of this invention achieves millimeter-level accuracy monitoring of bridge deformation by relying on the reference stations; when the number of reference stations is insufficient, the bridge monitoring and early warning system simulates virtual reference stations based on existing reference stations, and achieves millimeter-level accuracy monitoring of bridge deformation based on the virtual reference stations and differential algorithms.

[0012] The monitoring platform of the present invention includes an observation data processor, a deformation analyzer, and a display terminal. The display terminal displays the deformation status of the bridge in the form of graphs or tables for users to view, and automatically analyzes and judges the displacement of the bridge and adopts graded early warning.

[0013] The tiered early warning system described in this invention is a three-level system, with warning thresholds for each level as follows: Level 1 warning threshold Δ1m, Level 2 warning threshold Δ2m, and Level 3 warning threshold Δ3m. Warning indicators include main beam deflection deformation, main beam horizontal deformation, bridge tower deformation, natural frequency change, and cable deformation. The real-time monitoring value Δ0 of the warning indicators is used. When Δ0 < Δ1m, it is in a normal state, and a green warning is issued to the user. When Δ1m ≤ Δ0 < Δ2m, it is in a Level 1 warning state, at which point the monitoring frequency is automatically increased, and a yellow warning is issued to the user. When Δ2m ≤ Δ0 < Δ3m, it is in a Level 2 warning state, and an orange warning is issued to the user, who should inspect the structural components and perform stress analysis. When Δ0 ≥ Δ3m, it is in a Level 3 warning state, and a red warning is issued to the user, who must immediately take emergency control measures for the bridge.

[0014] The bridge monitoring and early warning system described in this invention connects to a remote service center via a local area network, and simultaneously connects all devices supporting network ports to the urban bridge information monitoring system in various locations through a switch to achieve both manual and remote control.

[0015] Compared with the prior art, the present invention has the following significant effects:

[0016] (1) When the present invention receives an accident warning information from a bridge monitoring and early warning system based on Beidou automated monitoring, it will form a dynamic water curtain at the bridge entrance and project the accident warning information onto the vehicle-facing surface at the bridge entrance to form a virtual three-dimensional space. This can achieve an unobstructed and flexible barrier effect that is clearly visible from a distance, regardless of day or night, and effectively block vehicles at the bridge entrance. This avoids the consequences of blocked escape routes, casualties, and property damage caused by vehicles and pedestrians still being able to enter the bridge after an accident.

[0017] (2) The bridge monitoring and early warning system based on Beidou automated monitoring relies on my country's independently developed global satellite navigation system. It can perform multi-point measurements, is flexible in setting up measurement points, has low monitoring costs, is less affected by weather, and can perform measurements in severe weather conditions such as heavy rain and fog. It can also meet the requirements for high-frequency and low-frequency measurement accuracy.

[0018] (3) The bridge monitoring and early warning system of the present invention relies on the Beidou satellite navigation system and the Beidou ground-based augmentation system to realize real-time millimeter-level monitoring of bridge deformation. Therefore, when the present invention receives information on emergency events such as bridge deck fracture and bridge collapse, it can promptly detect, respond to and trigger on-site alarms.

[0019] (4) The bridge monitoring and early warning system based on BeiDou automated monitoring of this invention will realize remote control function of the service center by constructing a local area network. At the same time, the switch can integrate all devices supporting network ports with the currently popular urban bridge information supervision system platforms in various provinces and cities to realize integrated management and control of the emergency control system, and improve the speed, effectiveness and intelligent management and control level of safety management. It can also display the basic information status of the bridge emergency safety active prevention and control system, including the status of the equipment and the on / off status of each device. Managers can selectively operate according to the status of the equipment, obtain on-site alarm information in time, and take emergency plans immediately, thereby improving the infrastructure disaster monitoring, early warning and safety assurance capabilities.

[0020] (5) In the event of a serious emergency safety accident such as bridge deck fracture or even overall collapse, this invention can promptly detect, respond to and trigger a red alarm on site, forming a continuous water curtain barrier in the lateral space on the front side of the vehicle. Combined with other safety warning information such as loudspeakers, it has a strong warning effect and will not cause rigid collisions to block vehicles. Especially for high-speed vehicles, at the beginning of the device's activation, it uses a flexible approach to control passing vehicles and pedestrians to protect them. Even if a vehicle does not have time to stop and passes through the area, there will be no secondary accidents such as collisions.

[0021] (6) All facilities of this invention can be integrated on the mounting base. The base can be installed using an integrated cabinet method or a gantry method. The water curtain equipment uses a water pump, spray holes, and suction holes to form a dynamic water curtain. At the same time, a virtual three-dimensional space is formed on the oncoming surface at the bridge entrance through high-brightness laser projection, achieving an unobstructed flexible barrier effect that is clearly visible from a distance, regardless of day or night. It is also equipped with a wastewater recycling tank heating device, which is not limited by the climate in the north and south. The water circulation continuously meets the needs of the water curtain operation, saving resources, being green and environmentally friendly, and having no adverse impact on the road surface and the environment.

[0022] (7) This invention is a bridge monitoring and early warning system based on BeiDou automated monitoring. The deformation status of the bridge can be displayed intuitively for users to view through graphs, tables, etc. At the same time, it can automatically analyze and determine whether there is any displacement of the bridge, conduct real-time monitoring, and adopt graded early warning. When a red emergency safety accident such as bridge deck fracture or bridge collapse is received, all devices can achieve one-click linkage. It can be integrated with the urban bridge information supervision system platform that is currently being popularized in various provinces and cities to achieve integrated and intelligent management of the emergency control system. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1This is a structural schematic diagram of the flexible water curtain barrier system for bridge collapse accidents of the present invention;

[0025] Figure 2 This is a schematic diagram of the flexible water curtain barrier system for bridge collapse accidents of the present invention;

[0026] Figure 3 This is a structural diagram of the bridge monitoring and early warning system of the present invention;

[0027] Figure 4 This is a schematic diagram of the graded early warning system of the present invention.

[0028] In the diagram: 1-base, 2-water curtain device, 3-high-brightness laser projection device, 4-high-volume speaker, 5-detection device; 6-light curtain. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the embodiments and accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative effort without departing from the inventive concept of the present invention are within the scope of protection of the present invention.

[0030] like Figure 1 , Figure 2 As shown, this invention discloses a flexible water curtain barrier system for bridge collapse accidents based on BeiDou automated monitoring. The system includes an intelligent control terminal, a base 1, a water curtain device 2 installed on the base 1, a high-brightness laser projection device 3, a loudspeaker 4, and a detection device 5. The water curtain device 2, high-brightness laser projection device 3, loudspeaker 4, and detection device 5 are all connected to the intelligent control terminal. The intelligent control terminal receives accident warning information from the bridge monitoring and early warning system based on BeiDou automated monitoring and controls the water curtain device 2 to form a water curtain barrier at the bridge entrance. The high-brightness laser projection device 3 projects the accident warning information onto the water curtain barrier, while the loudspeaker 4 emits an alarm sound to prevent vehicles from entering the bridge. The detection device 5 monitors the bridge's operating status and vehicle information within the bridge and uploads the information in real time.

[0031] The base 1 is a gantry type. The water curtain device includes a water curtain generator, a water pump, a water tank, and a wastewater recycling tank. Both the high-brightness laser projection device 3 and the water curtain generator are located at the top of the base 1. A loudspeaker 4 and a detection device 5 are mounted on the vertical support columns of the base 1. The water pump's inlet is connected to the water tank, and its outlet is connected to the water curtain generator. The wastewater recycling tank, located below the water curtain generator, receives the falling water and circulates it back to the water tank. A heater is installed inside the water tank, allowing the invention to operate regardless of climate. Furthermore, the water circulation continuously meets the needs of the water curtain operation, saving resources and being environmentally friendly, with no adverse effects on the road surface or the environment. The water curtain generator forms a water curtain barrier with relatively small water consumption, producing a mist-like effect. The water curtain device is placed at the bridgehead, posing no safety hazard to the bridge structure.

[0032] The water curtain device 2, high-brightness laser projection device 3, loudspeaker 4, and detection device 5 are connected to the urban bridge information monitoring platform via an intelligent control terminal to achieve one-click linkage. When a red-level emergency safety accident is triggered, all devices on the base 1 of this flexible water curtain barrier system are connected to the terminal of the urban bridge information monitoring platform to achieve one-click linkage, forming a virtual three-dimensional water curtain barrier in the lateral space area on the vehicle-facing side at the bridge entrance, and acquiring real-time status information inside the bridge. Accident warning information is projected onto the water curtain through the high-brightness laser projection device to prohibit vehicles from entering the bridge.

[0033] The working process of the flexible water curtain barrier system for bridge collapse accidents of this invention is as follows: When the system receives a red emergency incident information sent by the urban bridge information monitoring system platform, all devices on the base 1 are connected to the intelligent control terminal to achieve one-click linkage. The water curtain device 2 forms a continuous water curtain distribution in the lateral space area on the front of the vehicle; at the same time, the high-brightness laser projection device 3 is used to project warning information onto the water curtain to achieve a high-brightness red light curtain that can be identified from a distance. A higher-brightness prohibition pattern, such as a prohibition shape pattern ("×" pattern) or prohibition text pattern, is formed in the light curtain area 6. In the three-dimensional space on the front of the vehicle, a light barrier system is formed with the high-brightness red light curtain as the carrier and the higher-brightness red prohibition pattern as the clear information display. In addition, when the system is turned on, the high-decibel alarm 4 installed on the base 1 emits a high-decibel alarm. The sound is used to stop or slow down vehicles; the detection device 5 monitors and collects the bridge's operational status information in real time (such as whether the bridge has been hit by a ship and whether there has been a large deformation or even a break, which seriously affects the bridge's operation) and vehicle information within the bridge. This information is then transmitted to the urban bridge information monitoring platform for analysis. The system counts the number of vehicles passing through the water curtain barrier system and analyzes the number of vehicles entering the bridge after the system is activated. This not only evaluates the barrier effect of the system but also provides information on trapped vehicles on-site for evacuation and rescue within the bridge, providing decision-making data for evacuation and rescue.

[0034] like Figure 3 As shown, the bridge monitoring and early warning system includes a base station, a data transmission system, multiple positioning monitoring points installed on the bridge, monitoring point data collectors, and a deformation monitoring platform. The monitoring point data collectors are connected to each positioning monitoring point through the data transmission system. The base station receives data from the BeiDou satellite and transmits the received data and its own coordinates to the monitoring point data collectors after correction. Each positioning monitoring point transmits the collected bridge data to the monitoring point data collectors. The monitoring point data collectors perform relative differential processing on the data transmitted by the BeiDou satellite and the coordinate data of the base station to obtain the deformation data of the positioning monitoring point relative to the base station, and transmit the deformation data to the deformation monitoring platform for analysis and display.

[0035] The role of the base station is to receive signals from BeiDou satellites and transmit the received data and its own coordinates to the data acquisition device at the monitoring point after correction.

[0036] The positioning monitoring point is fixedly installed on the bridge. The monitoring point data acquisition device simultaneously receives information from the Beidou satellite and the base station. Then, it performs relative differential processing on the information collected from the two to obtain the deformation data of the positioning monitoring point relative to the base station, and transmits this data to the deformation monitoring platform.

[0037] The deformation monitoring platform receives data from monitoring point data acquisition devices and, relying on the BeiDou satellite navigation system and BeiDou ground-based augmentation system, achieves real-time millimeter-level monitoring of bridge deformation. When the number of reference stations is sufficient, millimeter-level accuracy is achieved by fully utilizing these stations; when the number of reference stations is insufficient, virtual reference stations are simulated based on existing stations, and millimeter-level accuracy is achieved using the virtual reference stations and differential algorithms. The deformation monitoring platform can display a 3D model of the structure, on-site images, displacement data curves, tables, etc., and can analyze historical and current data to provide a preliminary analysis and assessment of the structural displacement development for user review.

[0038] The deformation monitoring platform consists of an observation data processor, a deformation analyzer, and a display terminal. The display terminal visually displays the bridge's deformation status for user viewing and automatically analyzes and judges the bridge's displacement, providing real-time monitoring and tiered early warning systems. Figure 4 As shown, the tiered early warning system is divided into three levels, with warning values ​​of Δ1m, Δ2m, and Δ3m respectively. The warning indicators include main beam deflection deformation, main beam horizontal deformation, bridge tower deformation, natural frequency change, and cable deformation. The real-time monitoring value of the warning indicators is Δ0. When Δ0 < Δ1m, it is in a normal state; when Δ1m ≤ Δ0 < Δ2m, it is in a level one warning state, at which point the monitoring frequency is automatically increased; when Δ2m ≤ Δ0 < Δ3m, it is in a level two warning state; and when Δ0 ≥ Δ3m, it is in a level three warning state.

[0039] Bridge structures are complex systems, and it is difficult to evaluate the health status of a bridge directly using monitoring values ​​without addressing numerous early warning indicators. Therefore, a comprehensive indicator early warning strategy should be adopted as the early warning method for bridge structures. Early warning indicators can be acquired in real time through the BeiDou bridge monitoring system. These indicators mainly include main girder deflection deformation, main girder horizontal deformation, bridge tower deformation, natural frequency changes, and cable deformation. Main girder deflection deformation, as an early warning indicator of bridge alignment, can be obtained by monitoring points deployed at the mid-span, 1 / 4 section, and 3 / 4 section of the main girder. Main girder horizontal deformation is divided into longitudinal displacement and lateral displacement. Longitudinal displacement affects the working state of expansion joints and beam end dampers, while lateral deformation affects the working state of supports. This type of indicator can be obtained by monitoring points deployed at the beam ends. Bridge tower deformation mainly includes horizontal displacement and tower tilting, which can be obtained by monitoring points deployed at the top of the main tower. The natural frequency change of the bridge can serve as an early warning indicator of the overall vibration characteristics of the entire bridge, and its value can be obtained from bridge vibration monitoring data. Cable deformation includes the deformation of the main cable and the stay cables. Cable deformation can serve as an early warning indicator of the overall stress on the bridge, and its value can be obtained through monitoring points set up on the cables.

[0040] Early warning thresholds can be established based on national or relevant local standards, theoretical formulas, and regional data statistics. The setting of these thresholds is crucial for the monitoring system to promptly detect structural stress anomalies and issue warning signals. The early warning system has three levels of warnings, with thresholds Δ1m, Δ2m, and Δ3m for each level. Users set these thresholds based on the response values ​​of various bridge structures under unfavorable loads. The warning level is determined by comparing the real-time monitoring value Δ0 with the warning threshold Δm. In the normal state (green), the monitored value and the warning threshold should satisfy: Δ0 < Δ1m, meaning all monitored values ​​are less than the first-level warning threshold, and the bridge structure is in a safe operating condition with no safety hazards. In the first-level warning state (yellow), the monitored value and the warning threshold should satisfy: Δ1m ≤ Δ0 < Δ2m, meaning the Beidou bridge monitoring system has detected a potential hazard affecting the safe operation of the bridge structure, with deformation values ​​deviating from normal values. The system will automatically increase the monitoring frequency and issue a yellow warning, providing feedback to the user through various means. Under Level 2 warning (orange), the monitored value and the warning threshold should satisfy the following condition: Δ2m ≤ Δ0 < Δ3m. This means that if the BeiDou bridge monitoring system detects one or more values ​​exceeding the Level 2 warning threshold, affecting structural safety, the system will issue an orange warning to the user. The user should then inspect the structural components and perform stress analysis. Under Level 3 warning (red), the monitored value and the warning threshold should satisfy the following condition: Δ0 ≥ Δ3m. This means that if the BeiDou bridge monitoring system detects one or more values ​​exceeding the Level 3 warning threshold, indicating bridge deck fracture or even complete collapse, the user must immediately take emergency prevention and control measures for the bridge.

[0041] The bridge monitoring and early warning system realizes the remote control function of the service center by building a local area network. At the same time, with the help of a switch, all devices supporting network ports can be connected to the urban bridge information management systems being popularized in various provinces and cities for linkage, so as to achieve dual control of manual and remote operations. Once the connection is completed, the urban bridge information management platform will intuitively display various basic status information of the bridge emergency safety active prevention and control system, including the status of devices and the on / off status of each device. Managers can perform selective operations according to the status of the devices, obtain on-site alarm information in a timely manner, immediately take emergency plans, and improve the disaster monitoring, early warning and safety guarantee capabilities of infrastructure.

Claims

1. A flexible water curtain barrier system for bridge collapse accidents based on BeiDou automated monitoring, characterized in that: The system includes an intelligent control terminal, a base, a water curtain device mounted on the base, a high-brightness laser projection device, a loudspeaker, and a detection device. The water curtain device, high-brightness laser projection device, loudspeaker, and detection device are all connected to the intelligent control terminal. The intelligent control terminal receives accident warning information from a bridge monitoring and early warning system based on BeiDou automated monitoring and controls the water curtain device to form a water curtain barrier at the bridge entrance. The high-brightness laser projection device projects the accident warning information onto the water curtain barrier, while the loudspeaker emits an alarm sound to prevent vehicles from entering the bridge. The detection device collects the bridge's operating status information and vehicle information within the bridge and uploads the information in real time.

2. The flexible water curtain barrier system for bridge collapse accidents according to claim 1, characterized in that: The water curtain device, high-brightness laser projection device, loudspeaker, and detection device are connected to the urban bridge information supervision platform through an intelligent control terminal to achieve one-click linkage.

3. The flexible water curtain barrier system for bridge collapse accidents according to claim 2, characterized in that: The base is a gantry type. The water curtain device includes a water curtain generator, a water pump, a water tank, and a wastewater recycling tank. The high-brightness laser projection device and the water curtain generator are both located at the top of the base. The loudspeaker and the detection device are located on the vertical support columns of the base. The inlet end of the water pump is connected to the water tank, and the outlet end is connected to the water curtain generator. The wastewater recycling tank is located below the water curtain generator and is used to receive the falling water and circulate it back to the water tank. A heater is provided in the water tank.

4. The flexible water curtain barrier system for bridge collapse accidents according to claim 3, characterized in that: The bridge monitoring and early warning system includes a base station, a data transmission system, multiple positioning monitoring points installed on the bridge, monitoring point data collectors, and a deformation monitoring platform. The monitoring point data collectors are connected to each positioning monitoring point through the data transmission system. The base station receives data from the BeiDou satellite and transmits the received data and its own coordinates, after correction, to the monitoring point data collectors. Each positioning monitoring point transmits the collected bridge data to the monitoring point data collectors. The monitoring point data collectors perform relative differential processing on the data transmitted by the BeiDou satellite and the coordinate data of the base station to obtain the deformation data of the positioning monitoring point relative to the base station, and transmit the deformation data to the deformation monitoring platform for analysis and display.

5. The flexible water curtain barrier system for bridge collapse accidents according to claim 4, characterized in that: When the number of reference stations is sufficient, the bridge monitoring and early warning system relies on the reference stations to achieve millimeter-level accuracy in monitoring bridge deformation; when the number of reference stations is insufficient, the bridge monitoring and early warning system simulates virtual reference stations based on existing reference stations, and achieves millimeter-level accuracy in monitoring bridge deformation based on the virtual reference stations and differential algorithms.

6. The flexible water curtain barrier system for bridge collapse accidents according to claim 5, characterized in that, The deformation monitoring platform consists of an observation data processor, a deformation analyzer, and a display terminal. The display terminal intuitively displays the deformation status of the bridge for users to view, and automatically analyzes and judges the displacement of the bridge, performing real-time monitoring while adopting graded early warning.

7. The flexible water curtain barrier system for bridge collapse accidents according to claim 6, characterized in that: The tiered early warning system is a three-level system, with the following thresholds for each level: Level 1 warning threshold Δ1m, Level 2 warning threshold Δ... 2m The secondary warning threshold is Δ3m. The warning indicators include main beam deflection deformation, main beam horizontal deformation, bridge tower deformation, natural frequency change, and cable deformation. The real-time monitoring value of the warning indicator is Δ0. When Δ0 < Δ 1m This means it is in a normal state and simultaneously issues a green alert to the user; when Δ 1m ≤Δ0<Δ 2m This indicates a Level 1 warning state, at which point the monitoring frequency is automatically increased, and a yellow warning is issued to the user; when Δ 2m ≤Δ0<Δ 3m This indicates a level-two warning status, triggering an orange warning notification to the user. The user should then inspect the structural components and conduct a stress analysis. When Δ0 ≥ Δ 3m This means the bridge is in a Level 3 warning state, and a red alert is issued to the user, who must immediately take emergency prevention and control measures.

8. The flexible water curtain barrier system for bridge collapse accidents according to claim 7, characterized in that: The bridge monitoring and early warning system is connected to the remote service center via a local area network. At the same time, it connects all devices with network ports to the urban bridge information supervision system in various locations through a switch to achieve both manual and remote control.

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