Early warning control system for culvert water accumulation vehicle and control method of early warning control system

Abstract

The invention discloses a culvert water accumulation vehicle early warning control system and a control method thereof, and relates to the related field of traffic safety, the culvert water accumulation vehicle early warning control system comprises a road end module and a vehicle end module, the road end module is installed in a culvert, and the vehicle end module is installed in a vehicle; the road end module comprises a road end control unit, and an environment monitoring unit, an information display unit, a road end communication unit and a power supply unit which are connected with the road end control unit; the road end communication unit is used for performing wireless information interaction with the vehicle end module; and the power supply unit is used for providing power support for the road end module. According to the culvert ponding vehicle early warning control system and the control method thereof, accurate and real-time control of the culvert ponding depth and the rainfall state is realized through the environment monitoring unit, and the monitoring efficiency is improved in combination with the dynamically adjusted monitoring frequency; meanwhile, automatic drainage control and main and standby power supply guarantee are supplemented, the vehicle passing risk caused by water accumulation in the culvert is comprehensively reduced, and driving safety and road smoothness are effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of traffic safety technology, specifically to a vehicle early warning and control system and its control method for flooded culverts. Background Art

[0002] During extreme weather events such as heavy rain, tunnels, overpasses, and other low-lying roads are prone to flooding due to poor drainage or insufficient drainage capacity. These phenomena can range from minor traffic congestion to serious safety hazards to passing vehicles and pedestrians. Therefore, when cars pass through underpasses and culverts, they need to use vehicle warning and control systems to warn of and control the accumulation of water in the underpasses and culverts.

[0003] The water level in culverts is mainly estimated manually based on experience, which is inaccurate and prone to errors, leading to irreparable losses. To overcome these problems, an automatic monitoring and early warning device for water accumulation in sunken traffic culverts can be referenced (Chinese patent application number CN202323292048.8, application date 2023-12-05). This device automatically and accurately measures the water level in sunken traffic culverts when it reaches a certain height and displays the measurement results in real time, solving the problems of insufficient manual observation time and inaccurate estimation. Alternatively, a highway culvert water accumulation monitoring system can be referenced (Chinese patent application number CN201821703948.3, application date 2018-10-19). This monitoring system detects water accumulation in sunken culverts crossing highways caused by heavy rainfall. In cases of deep water accumulation, early warning information should be quickly sent to pedestrians, vehicles, and culvert managers to facilitate timely emergency measures. Finally, a prior art (Chinese patent application number CN202120187366.X, application date 2021-01-22) discloses an automatic monitoring device for culvert water accumulation. This device uses a monitoring computer, microcontroller, level sensor, vehicle barrier, pumping equipment, and display screen to achieve real-time monitoring of water accumulation in low-lying areas of roads such as culverts, urban depressions, and underpasses. When the level sensor detects that the water accumulation in a low-lying area of ​​the culvert has reached the warning level, the microcontroller controls the vehicle barrier to automatically lower, prohibiting vehicles from entering the culvert and preventing danger to pedestrians and vehicles. The device also displays a warning on the display screen via text or other means (such as warning lights). Then, the pumping equipment promptly drains the water from the low-lying areas, achieving real-time monitoring and effective handling of water accumulation in low-lying areas.

[0004] While the aforementioned existing technologies can address the issues with culverts, other problems remain during use. When the water depth exceeds 30cm, the water pressure can breach the sealing threshold of the engine's intake system, causing the engine to stall due to water ingress and potentially leading to cylinder scoring. Furthermore, when electrical systems are submerged, the probability of short circuits in wiring harness connectors increases by over 80%, and precision components such as the ECU are prone to failure due to electrolytic corrosion. Submerged chassis components experience a 5-8 times faster rate of corrosion in bearings or drive shafts, resulting in significant property damage.

[0005] Therefore, we propose a vehicle early warning and control system and its control method for culvert flooding to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a vehicle early warning control system and control method for culvert flooding, in order to solve the problem mentioned in the background art that current early warning devices on the market cannot effectively remind vehicles and personnel about to pass through culverts and ensure their safety.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vehicle early warning and control system for culvert flooding, comprising a road-end module and a vehicle-end module, wherein the road-end module is installed inside the culvert, and the vehicle-end module is installed inside a vehicle; the road-end module includes a road-end control unit, and an environmental monitoring unit, an information display unit, a road-end communication unit, and a power supply unit connected to the road-end control unit; the environmental monitoring unit is used to monitor the culvert flooding depth and rainfall status; the information display unit is used to display flooding-related early warning information to passing vehicles; the road-end communication unit is used to wirelessly interact with the vehicle-end module; and the power supply unit is used to provide power support to the road-end module; The vehicle-mounted module includes an onboard control unit, and a positioning sensor, an onboard communication unit, and a voice broadcasting unit connected to the onboard control unit; the positioning sensor is used to acquire the real-time location and driving direction of the vehicle; the onboard communication unit is used to establish a communication connection with the roadside communication unit to receive early warning information; the voice broadcasting unit is used to issue a water accumulation warning to the occupants of the vehicle. The roadside control unit can generate early warning information based on the monitoring data of the environmental monitoring unit, display it through the information display unit, and send the early warning information to the vehicle-side module through the roadside communication unit; after receiving the early warning information, the vehicle-mounted control unit controls the voice broadcast unit to perform the early warning operation.

[0008] Preferably, the environmental monitoring unit includes a water accumulation monitoring subunit and a rainfall monitoring subunit; the water accumulation monitoring subunit includes a visual sensor and a water level sensor, the visual sensor is installed on the side wall at the lowest point of the culvert, and the water level sensor is arranged on the low-lying ground on both sides of the culvert; the visual sensor and the water level sensor respectively send water accumulation depth data to the road end control unit to achieve redundant monitoring; the rainfall monitoring subunit includes a raindrop sensor; the raindrop sensor is used to collect rainfall status data.

[0009] Preferably, the power supply unit includes a main power supply module and an emergency power supply module; the main power supply module is connected to the power grid and uses 220V AC power supply; the emergency power supply module includes a solar panel and an emergency battery, the solar panel is used to charge the emergency battery, and the emergency battery supplies power to the roadside module when the main power supply module loses power.

[0010] Preferably, the information display unit is an LED display screen installed at both ends of the culvert entrance, and the LED display screen can display a water accumulation warning, a speed limit warning, or a no-entry warning.

[0011] Preferably, the road end module further includes a drainage control unit, which is connected to the road end control unit and includes at least one drainage pump. The road end control unit can control the start, stop and speed of the drainage pump according to the water depth monitored by the environmental monitoring unit. The greater the water depth, the higher the speed of the drainage pump: when the water depth > 0, the drainage pump starts; the greater the water depth, the higher the speed of the drainage pump; when the water depth ≤ 0, the drainage pump stops.

[0012] Preferably, the vehicle control unit is the control core of the vehicle module. The vehicle control unit is connected to the vehicle communication unit, positioning sensor, and voice broadcast unit via wires and is connected to the vehicle power supply. The vehicle control unit, vehicle communication unit, positioning sensor, and voice broadcast unit are all installed in a sealed box under the seat.

[0013] A vehicle flood warning and control system for culverts is disclosed, along with a control method for issuing warnings of vehicles flooding culverts, as detailed below: S1. Environmental monitoring initialization: During the initial installation, environmental data of the culvert under the condition of no water accumulation is collected through the environmental monitoring unit as a benchmark for water depth identification; S2. Real-time monitoring and early warning adjustment: If the rainfall monitoring subunit detects no rainfall, the environmental monitoring unit monitors the water depth at the first frequency; if water accumulation is detected, it switches to the second frequency and controls the LED display to issue a water accumulation warning. When 0 < water depth ≤ 0.7 × safety threshold, the control information display unit issues a water accumulation and slow-moving warning. Calculate the maximum safe passage speed v when 0.7 × safety threshold < water depth < safety threshold. max The system controls the LED display to show speed limit reminders and sends speed limit information to the vehicle module via the roadside communication unit, triggering the voice broadcast unit to broadcast the speed limit reminders. When the water depth is greater than or equal to the safety threshold, the LED display screen will issue a no-entry warning, the no-entry information will be sent to the vehicle module through the roadside communication unit, the voice broadcast unit will be triggered to broadcast the no-entry warning, and an emergency repair reminder will be sent to the road administration department at the same time. If the rainfall monitoring subunit detects rainfall, the environmental monitoring unit monitors the water depth at the third frequency; if water accumulation is detected, it switches to the fourth frequency and generates corresponding early warning information based on the comparison between the water depth and the safety threshold.

[0014] Preferably, the method further includes a vehicle identification and communication pairing step: 1. The vehicle-mounted communication unit of the vehicle-side module searches for signals from roadside communication units within a preset range in real time; 2. If a signal is detected, the vehicle positioning sensor collects the vehicle's position and direction of travel, and the vehicle control unit determines whether to pass through the culvert based on the vehicle's position, direction of travel, and road information. 3. If it is determined that the vehicle will pass through, when the distance between the vehicle and the culvert is less than or equal to the preset distance, the vehicle communication unit will pair with the roadside control unit to receive the warning information.

[0015] Preferably, the preset range is 1000 meters and the preset distance is 300 meters.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: The culvert flooding vehicle early warning control system and its control method achieve precise and real-time control of culvert flooding depth and rainfall status through an environmental monitoring unit, and improve monitoring efficiency by dynamically adjusting the monitoring frequency; through a multi-dimensional early warning method using roadside LED displays and vehicle-side voice broadcasts, combined with vehicle identification and communication pairing, the early warning information is ensured to reach the target audience accurately; and with the assistance of automatic drainage control and main / backup power supply, the risks to vehicle passage caused by culvert flooding are comprehensively reduced, effectively ensuring driving safety and smooth traffic flow. Specific details are as follows: 1. The environmental monitoring unit adopts a redundant monitoring design with both visual sensors and water level sensors to collect water depth data. This effectively reduces monitoring errors caused by the failure of a single sensor, improves the accuracy and reliability of water depth judgment, and provides precise data support for subsequent early warning decisions.

[0017] 2. The power supply unit adopts a combination of main power supply module and emergency power supply module, which can not only ensure the stable power supply of the system on a daily basis, but also automatically switch to emergency power supply when the main power supply is interrupted, ensuring that the monitoring and early warning functions are not interrupted and improving the system's risk resistance capability.

[0018] 3. The control method dynamically adjusts the monitoring frequency of the visual sensor according to the rainfall status and water accumulation, so as to ensure the monitoring accuracy while avoiding unnecessary high-frequency monitoring energy consumption, thereby optimizing resource allocation and reducing system operating costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the vehicle early warning and control process for culvert flooding according to the present invention; Figure 2 This is a schematic diagram of the vehicle identification process through the culvert according to the present invention; Figure 3 This is a schematic diagram of the main structure of the road end module of the present invention; Figure 4 This is a top view of the vehicle-end module of the present invention; Figure 5 This is a schematic diagram of the main structure of the vehicle-side module of the present invention.

[0020] In the diagram: 1. Roadside control unit; 2. Vision sensor; 3. Water level sensor; 4. Raindrop sensor; 5. LED display screen; 6. Vehicle control unit; 7. Positioning sensor; 8. Vehicle communication unit; 9. Voice broadcasting unit; 10. Vehicle power supply. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please see Figures 1-5 The present invention provides the following technical solution: a vehicle early warning and control system for culvert water accumulation.

[0023] The system includes a roadside module and a vehicle-side module. The roadside module is installed inside the culvert, and the vehicle-side module is installed inside the vehicle. The roadside module includes a roadside control unit 1, and an environmental monitoring unit, an information display unit, a roadside communication unit, and a power supply unit connected to the roadside control unit 1. The environmental monitoring unit is used to monitor the water depth and rainfall status of the culvert. The information display unit is used to display water accumulation-related warning information to passing vehicles. The roadside communication unit is used for wireless information interaction with the vehicle-side module. The power supply unit is used to provide power support to the roadside module. The vehicle-side module includes an onboard control unit 6, and a positioning sensor 7, an onboard communication unit 8, and a voice broadcast unit 9 connected to the onboard control unit 6. The positioning sensor 7 is used to obtain vehicle location data. The system monitors the location and direction of travel; the vehicle-mounted communication unit 8 establishes a communication connection with the roadside communication unit to receive warning information; the voice broadcast unit 9 issues a water accumulation warning to the occupants of the vehicle; the roadside control unit 1 generates warning information based on the monitoring data of the environmental monitoring unit, displays it through the information display unit, and sends the warning information to the vehicle-mounted module through the roadside communication unit; after receiving the warning information, the vehicle-mounted control unit 6 controls the voice broadcast unit 9 to perform the warning operation; the environmental monitoring unit includes a water accumulation monitoring subunit and a rainfall monitoring subunit; the water accumulation monitoring subunit includes a visual sensor 2 and a water level sensor 3, the visual sensor 2 is installed on the side wall at the lowest point of the culvert, and the water level sensor 3 is arranged on both sides of the culvert at low elevations. The culvert features a low-lying area; visual sensor 2 and water level sensor 3 send water depth data to the roadside control unit 1 for redundant monitoring; a rainfall monitoring subunit includes a raindrop sensor 4 for collecting rainfall data; a power supply unit includes a main power supply module and an emergency power supply module; the main power supply module is connected to the power grid and uses 220V AC power; the emergency power supply module includes a solar panel and an emergency battery, the solar panel charges the emergency battery, and the emergency battery powers the roadside module when the main power supply module fails; an information display unit is an LED display screen 5 installed at both ends of the culvert entrance, which displays water accumulation warnings, speed limit warnings, or no-entry warnings; the roadside module also includes a drainage control unit. The unit includes a drainage control unit connected to the roadside control unit 1, and includes at least one drainage pump. The roadside control unit 1 can control the start, stop, and speed of the drainage pump according to the water depth monitored by the environmental monitoring unit. The greater the water depth, the higher the speed of the drainage pump: when the water depth > 0, the drainage pump starts; the greater the water depth, the higher the speed of the drainage pump; when the water depth ≤ 0, the drainage pump stops. The vehicle control unit 6 is the control core of the vehicle module. The vehicle control unit 6 is connected to the vehicle communication unit 8, the positioning sensor 7, and the voice broadcast unit 9 through wires and is connected to the vehicle power supply 10. The vehicle control unit 6, the vehicle communication unit 8, the positioning sensor 7, and the voice broadcast unit 9 are all installed in a sealed box under the seat.

[0024] After the system starts up, the roadside module and the vehicle-side module operate in coordination. In the roadside module, the power supply unit provides normal power to the system through the 220V AC power supply in the main power supply module. If the main power supply is interrupted, the emergency power supply module, which is an emergency battery charging the solar panels, automatically switches the power supply to ensure the continuous operation of the system. The raindrop sensor 4 continuously collects rainfall data, and the vision sensor 2, installed on the lowest side wall of the culvert, and the water level sensor 3, arranged on the low-lying ground on both sides of the culvert, work together to monitor the water depth. Both send data to the roadside control unit 1 to form redundant monitoring and ensure the accuracy of the water depth data.

[0025] On the one hand, the monitoring frequency of the visual sensor 2 is dynamically adjusted according to the rainfall and water accumulation conditions. For example, the monitoring frequency is low when there is no rain or water accumulation, and the frequency is increased when there is rain or water accumulation. On the other hand, the corresponding warning information is generated by combining the comparison results of water accumulation depth and safety threshold. The warning information is displayed on the LED display screens 5 installed at both ends of the culvert entrance, indicating water accumulation, speed limit, or no-entry warning. The warning information is also sent to the vehicle module through the roadside communication unit. At the same time, the roadside control unit 1 links with the drainage control unit to control the drainage pump according to the water accumulation depth: the drainage pump is started when the water accumulation depth is >0, and the speed is higher as the water accumulation is deeper; the drainage pump is stopped when the water accumulation depth is ≤0, thus actively reducing water accumulation.

[0026] In the vehicle-side module, the on-board control unit 6 is the primary operator: the positioning sensor 7 acquires the vehicle's position and direction of travel in real time, and the on-board communication unit 8 searches for signals from roadside communication units within a preset range; when it is determined that the vehicle is about to pass through a culvert and the distance is ≤ a preset distance, the on-board communication unit 8 establishes pairing with the roadside communication unit and receives warning information; after receiving the information, the on-board control unit 6 controls the voice broadcasting unit 9 to issue corresponding speed limit or no-entry voice prompts to the occupants of the vehicle, realizing vehicle-road cooperative warning. A vehicle flood warning and control system for culverts is disclosed, along with a control method for issuing warnings of vehicles flooding culverts, as detailed below: S1. Environmental monitoring initialization: During the initial installation, environmental data of the culvert under the condition of no water accumulation is collected through the environmental monitoring unit as a benchmark for water depth identification; S2. Real-time monitoring and early warning adjustment: If the rainfall monitoring subunit detects no rainfall, the environmental monitoring unit monitors the water depth at the first frequency; if water accumulation is detected, it switches to the second frequency, which is higher than the first frequency, and controls the LED display 5 to issue a water accumulation warning. When visual sensor 2 is first installed, it takes pictures of the road environment when there is no water accumulation in the culvert, which serves as the basis for water depth identification. Rain sensor 4 measures whether it is raining in real time and sends the signal to the roadside control unit 1. If there is no rain, visual sensor 2 sends the collected signal to the roadside control unit 1, which calculates the water depth and then makes a judgment and process: if there is no water accumulation (water depth is 0), the original monitoring frequency of culvert water accumulation is maintained, once every 3 hours; if there is water accumulation, the monitoring frequency is increased to once every 1 hour, and... The system sends a command to LED display screen 5, reminding oncoming vehicles that there is water accumulation in the underpass and to proceed slowly. If it is raining, the roadside control unit 1 sends a command to vision sensor 2 to increase the monitoring frequency to once every 10 minutes and sends the collected signals back to the roadside control unit 1. The roadside control unit 1 calculates the water depth and then makes a judgment and takes action: if there is no water accumulation, it continues monitoring; if there is water accumulation, the roadside control unit 1 sends a command to vision sensor 2 to increase the monitoring frequency to once every 1 minute and then compares the water depth with the safety threshold.

[0027] When 0 < water depth ≤ 0.7 × safety threshold, the control information display unit issues a water accumulation and slow-moving warning. Calculate the maximum safe passage speed v when 0.7 × safety threshold < water depth < safety threshold. max The system controls the LED display screen 5 to display speed limit reminders and sends speed limit information to the vehicle module through the roadside communication unit, triggering the voice broadcast unit 9 to broadcast the speed limit reminders. When the water depth is greater than or equal to the safety threshold, the LED display screen 5 is controlled to issue a no-entry warning, and the no-entry information is sent to the vehicle module through the roadside communication unit, triggering the voice broadcast unit 9 to broadcast the no-entry warning, and at the same time sending an emergency repair reminder to the road administration department; If the rainfall monitoring subunit detects rainfall, the environmental monitoring unit monitors the water depth at a third frequency, which is higher than the first frequency. If water accumulation is detected, it switches to a fourth frequency, which is higher than the third frequency, and generates corresponding warning information based on the comparison between the water depth and the safety threshold. The system also includes vehicle identification and communication pairing steps: 1. The vehicle-mounted communication unit 8 of the vehicle module searches for signals from roadside communication units within a preset range in real time; 2. If a signal is found, the vehicle positioning sensor 7 collects the vehicle's position and driving direction, and the vehicle control unit 6 determines whether the vehicle will pass through the culvert based on the vehicle's position, driving direction, and road information; 3. If the vehicle is determined to pass through, when the distance between the vehicle and the culvert is ≤ a preset distance, the vehicle-mounted communication unit 8 establishes pairing with the roadside control unit 1 to receive warning information; the preset range is 1000 meters, and the preset distance is 300 meters.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle early warning and control system for culvert water accumulation, comprising a road-end module and a vehicle-end module, wherein the road-end module is installed inside the culvert and the vehicle-end module is installed inside a vehicle; Its features are: The roadside module includes a roadside control unit (1), and an environmental monitoring unit, an information display unit, a roadside communication unit, and a power supply unit connected to the roadside control unit (1); the environmental monitoring unit is used to monitor the water depth and rainfall status of the culvert; the information display unit is used to display water accumulation-related early warning information to passing vehicles; The roadside communication unit is used to wirelessly exchange information with the vehicle-side module; the power supply unit is used to provide power support to the roadside module. The vehicle-side module includes an on-board control unit (6), a positioning sensor (7), an on-board communication unit (8), and a voice broadcasting unit (9) connected to the on-board control unit (6); the positioning sensor (7) is used to obtain the real-time location and driving direction of the vehicle; the on-board communication unit (8) is used to establish a communication connection with the roadside communication unit to receive early warning information; the voice broadcasting unit (9) is used to issue a water accumulation early warning to the people in the vehicle. The roadside control unit (1) can generate early warning information based on the monitoring data of the environmental monitoring unit, display it through the information display unit, and send the early warning information to the vehicle-side module through the roadside communication unit; after receiving the early warning information, the vehicle-mounted control unit (6) controls the voice broadcasting unit (9) to perform the early warning operation.

2. The culvert flooding vehicle early warning and control system according to claim 1, characterized in that: The environmental monitoring unit includes a water accumulation monitoring subunit and a rainfall monitoring subunit; the water accumulation monitoring subunit includes a visual sensor (2) and a water level sensor (3), the visual sensor (2) is installed on the side wall at the lowest point of the culvert, and the water level sensor (3) is arranged on the low-lying ground on both sides of the culvert; the visual sensor (2) and the water level sensor (3) respectively send water accumulation depth data to the road end control unit (1) to achieve redundant monitoring; the rainfall monitoring subunit includes a raindrop sensor (4); the raindrop sensor (4) is used to collect rainfall status data.

3. The culvert flooding vehicle early warning control system according to claim 1, characterized in that: The power supply unit includes a main power supply module and an emergency power supply module; the main power supply module is connected to the power grid and uses 220V AC power supply; the emergency power supply module includes a solar panel and an emergency battery, the solar panel is used to charge the emergency battery, and the emergency battery supplies power to the roadside module when the main power supply module loses power.

4. The culvert flooding vehicle early warning and control system according to claim 1, characterized in that: The information display unit is an LED display screen (5) installed at both ends of the culvert entrance. The LED display screen (5) can display a water accumulation warning, a speed limit warning, or a no-entry warning.

5. The culvert flooding vehicle early warning control system according to claim 1, characterized in that: The road end module also includes a drainage control unit, which is connected to the road end control unit (1) and includes at least one drainage pump; the road end control unit (1) can control the start, stop and speed of the drainage pump according to the water depth monitored by the environmental monitoring unit. The greater the water depth, the higher the speed of the drainage pump: when the water depth > 0, the drainage pump starts. The greater the depth of the water, the higher the speed of the drainage pump. When the water depth is ≤0, the drainage pump stops.

6. The culvert flooding vehicle early warning control system according to claim 1, characterized in that: The vehicle control unit (6) is the control core of the vehicle module. The vehicle control unit (6) is connected to the vehicle communication unit (8), the positioning sensor (7), and the voice broadcast unit (9) through wires and connected to the vehicle power supply (10). The vehicle control unit (6), the vehicle communication unit (8), the positioning sensor (7), and the voice broadcast unit (9) are installed together in a sealed box under the seat.

7. The culvert flooding vehicle early warning and control system according to claim 1, characterized in that: The control method for vehicle warnings in underpass flooding was also disclosed, as detailed below: S1. Environmental monitoring initialization: During the initial installation, environmental data of the culvert under the condition of no water accumulation is collected through the environmental monitoring unit as a benchmark for water depth identification; S2. Real-time monitoring and early warning adjustment: If the rainfall monitoring subunit detects no rainfall, the environmental monitoring unit monitors the water depth at the first frequency; if water accumulation is detected, it switches to the second frequency (the second frequency is higher than the first frequency) and controls the LED display screen (5) to issue a water accumulation warning; When 0 < water depth ≤ 0.7 × safety threshold, the control information display unit issues a water accumulation and slow-moving warning. Calculate the maximum safe passage speed v when 0.7 × safety threshold < water depth < safety threshold. max The LED display screen (5) is controlled to display the speed limit reminder, and the speed limit information is sent to the vehicle module through the roadside communication unit, triggering the voice broadcast unit (9) to broadcast the speed limit reminder. When the water depth is greater than or equal to the safety threshold, the LED display screen (5) is controlled to issue a no-entry warning, and the no-entry information is sent to the vehicle module through the roadside communication unit (8), triggering the voice broadcast unit (9) to broadcast the no-entry warning, and at the same time sending a repair reminder to the road administration department; If the rainfall monitoring subunit detects rainfall, the environmental monitoring unit monitors the water depth at the third frequency (the third frequency is higher than the first frequency); if water accumulation is detected, it switches to the fourth frequency (the fourth frequency is higher than the third frequency) and generates corresponding early warning information based on the comparison between the water depth and the safety threshold.

8. The culvert flooding vehicle early warning control system according to claim 7, characterized in that: It also includes vehicle identification and communication pairing steps:

1. The vehicle-mounted communication unit (8) of the vehicle-end module searches for signals of road-end communication units within a preset range in real time; 2. If a signal is detected, the vehicle positioning sensor (7) collects the vehicle position and driving direction, and the vehicle control unit (6) determines whether to pass through the culvert based on the vehicle position, driving direction and road information.

3. If it is determined that the vehicle will pass through, when the distance between the vehicle and the culvert is less than or equal to the preset distance, the vehicle communication unit (8) and the roadside control unit (1) will establish a pairing to receive the warning information.

9. A culvert flooding vehicle early warning and control system according to claim 8, characterized in that: The preset range is 1000 meters, and the preset distance is 300 meters.

Images