Vehicle accident warning system based on synchronous broadcast

Abstract

The embodiment of the utility model discloses a vehicle accident warning system based on synchronous broadcast. In one specific embodiment, the system comprises a broadcast control terminal, a first communication component and a plurality of controllers arranged along the roadside of a tunnel, the controller is connected with a first horn loudspeaker, an alarm indicating lamp and a traffic incident detector, and the traffic incident detector is connected with a camera. According to the embodiment, the traffic condition in the tunnel can be monitored in real time through the traffic event detector, and the alarm mechanism is triggered immediately when the abnormal event is detected. The accident response time is obviously shortened, and the safety of tunnel traffic is improved. The horn loudspeaker and the alarm indicating lamp are combined for use, so that sound and visual double warning is provided for vehicles and people in the tunnel. The double warning mode improves the efficiency of information transmission, and ensures the accurate transmission of information. Modularized design is adopted in the assembly, and installation, maintenance and replacement are convenient.

Description

Technical Field

[0001] The utility model relates to the field of tunnel broadcasting, and more specifically, to a vehicle accident warning system based on synchronous broadcasting. Background Art

[0002] Currently, wired tunnel broadcast systems are crucial communications facilities in highway tunnels, primarily used to transmit information to vehicles and personnel within the tunnel in emergency situations, ensuring smooth and safe traffic. my country boasts numerous highway and urban tunnels, some stretching over ten kilometers. Once a vehicle enters a tunnel, it loses connection to the external network, preventing users from obtaining real-time information about the tunnel's status. Furthermore, if an accident occurs within the tunnel, vehicles traveling through it cannot access this information, potentially causing significant secondary damage.

[0003] In existing technology, accidents in tunnels aren't immediately announced. Instead, personnel at the monitoring center must manually notify the tunnel's public address system after discovering the incident, resulting in a long response time. Furthermore, existing tunnel warnings typically rely solely on loudspeaker broadcasts. However, due to factors such as masking, weather conditions, and tunnel noise, broadcasting alone can sometimes struggle to accurately deliver warning information to vehicles within the tunnel. Utility Model Content

[0004] The purpose of the present utility model is to provide a vehicle accident warning system based on synchronous broadcasting, so as to solve at least one of the problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a vehicle accident warning system based on synchronous broadcasting, comprising:

[0007] A broadcast control terminal, a first communication component, and a plurality of controllers arranged along the roadside of the tunnel;

[0008] The first control output end of the controller is connected to a plurality of first horn speakers, and the second control output end is connected to at least one warning indicator light; the first horn speakers are arranged along both sides of the tunnel road; the warning indicator light is arranged at the top of the tunnel;

[0009] The first acquisition terminal of the controller is connected to a traffic event detector; the signal output terminal of the traffic event detector is connected to the first acquisition terminal of the controller, and the video acquisition terminal of the traffic event detector is connected to a camera; the camera is arranged on the top of the tunnel and the image acquisition lens of the camera faces the middle of the tunnel;

[0010] The broadcast control terminal is connected to the communication terminal of each controller through the first communication component;

[0011] The first communication component is configured so that the communication ends of the controllers are communicatively connected to each other through the first communication component.

[0012] Furthermore, the controller includes a control module, a second communication component and a power amplifier;

[0013] The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component and the second communication component in sequence;

[0014] The first driving output end of the power amplifier is connected to each first horn loudspeaker respectively;

[0015] The first communication component is configured so that the control modules are communicatively connected to each other via the second communication component and the first communication component;

[0016] The first acquisition end of the control module is connected to the signal output end of the traffic event detector, and the second control output end is connected to the alarm indicator light.

[0017] Furthermore, the second communication component includes an optical network unit and a first optical switch;

[0018] The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component, the optical network unit and the first optical switch in sequence;

[0019] The first communication component is configured so that the communication ends of the control modules are sequentially connected to each other through the optical network unit and the first optical switch and through the first communication component.

[0020] Furthermore, the second acquisition end of the control module is connected to a microwave vehicle detector, and the microwave vehicle detector is arranged on the side of the tunnel road.

[0021] Furthermore, the first communication component includes a second optical switch, an optical line terminal, and an optical fiber splitter;

[0022] The broadcast control terminal is connected to the first communication end of the optical line terminal through the second optical switch;

[0023] The second communication end of the optical line terminal is connected to the main connection end of the optical fiber splitter;

[0024] The optical network unit of each controller is connected to the branch connection end of the optical fiber splitter respectively;

[0025] The optical line terminal is configured such that the communication ends of the control modules are sequentially connected to each other through the optical network unit, the first optical switch and the optical fiber splitter and through the optical line terminal;

[0026] The broadcast control terminal is connected to the communication input end of the power amplifier and the first communication end of the control module through the second optical switch, the optical line terminal, the optical fiber splitter, the optical network unit and the first optical switch in sequence.

[0027] Furthermore, the control module also includes a touch display module;

[0028] The communication end of the touch display module is connected to the second communication end of the control module.

[0029] Furthermore, the control module includes a programmable logic controller and / or an Ethernet switch.

[0030] Furthermore, the tunnel entrance is provided with at least one second horn speaker with the sound signal output end facing the side away from the tunnel entrance; the input end of the second horn speaker is connected to the second driving output end of the power amplifier of the controller close to the corresponding tunnel entrance.

[0031] Furthermore, the effective sound transmission distance of the second horn loudspeaker is greater than 100m.

[0032] Furthermore, the controller further comprises a plurality of sound detectors for detecting sound pressure, wherein the sound detectors are respectively arranged at the audio output ends of each of the first horn speakers and each of the second horn speakers;

[0033] The third collection end of the control module is connected to the output end of the sound detector.

[0034] The beneficial effects of the utility model are as follows:

[0035] First, the present invention uses a traffic incident detector to monitor tunnel traffic conditions in real time and immediately trigger an alarm mechanism when an abnormal event (such as a traffic accident) is detected. This instant response and automated processing capability significantly shortens incident response time, reduces the risk of secondary injuries, and improves tunnel traffic safety.

[0036] Secondly, the combined use of a horn speaker and warning indicator lights provides both audible and visual warnings to vehicles and personnel within the tunnel. The horn speaker's powerful sound penetration and coverage ensure clear transmission of information even in the noisy tunnel environment; while the warning indicator lights visually attract the driver's attention, enhancing the intuitiveness and effectiveness of information delivery. This dual warning method improves the efficiency of information transmission and ensures accurate communication.

[0037] Thirdly, the modular design of the controller, horn speaker, and alarm indicator components facilitates installation, maintenance, and replacement. Furthermore, the broadcast control terminal connects to each controller via communication components, forming a flexible and scalable communication network. This design allows the system to be flexibly configured and expanded based on actual needs, meeting the application requirements of various tunnel scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Figure 1 A diagram showing an exemplary system architecture in which an embodiment of the present invention can be applied.

[0040] Figure 2 A schematic structural diagram showing signal connections between controllers provided by an embodiment of the present invention is shown.

[0041] Figure 3 A schematic structural diagram of a controller provided by an embodiment of the present utility model is shown.

[0042] Figure 4 A schematic structural diagram of a second communication component provided by an embodiment of the present utility model is shown.

[0043] Figure 5 A schematic structural diagram of a first communication component provided by an embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the following detailed description is illustrative rather than restrictive and should not be used to limit the scope of protection of the present invention.

[0045] like Figure 1 The present invention provides a vehicle accident warning system based on synchronous broadcasting, comprising:

[0046] A broadcast control terminal, a first communication component, and a plurality of controllers arranged along the roadside of the tunnel;

[0047] The first control output end of the controller is connected to a plurality of first horn speakers, and the second control output end is connected to at least one warning indicator light; the first horn speakers are arranged along both sides of the tunnel road; the warning indicator light is arranged at the top of the tunnel;

[0048] The first acquisition terminal of the controller is connected to a traffic event detector; the signal output terminal of the traffic event detector is connected to the first acquisition terminal of the controller, and the video acquisition terminal of the traffic event detector is connected to a camera; the camera is arranged on the top of the tunnel and the image acquisition lens of the camera faces the middle of the tunnel;

[0049] like Figure 2 As shown, the broadcast control terminal is connected to the communication end of each controller through the first communication component;

[0050] The first communication component is configured so that the communication ends of the controllers are communicatively connected to each other through the first communication component.

[0051] First, the present invention uses a traffic incident detector to monitor tunnel traffic conditions in real time and immediately trigger an alarm mechanism when an abnormal event (such as a traffic accident) is detected. This instant response and automated processing significantly shortens incident response time, reduces the risk of secondary injuries, and improves tunnel traffic safety.

[0052] Secondly, the combined use of a horn speaker and warning indicator lights provides both audible and visual warnings to vehicles and personnel within the tunnel. The horn speaker's powerful sound penetration and coverage ensure clear transmission of information even in the noisy tunnel environment; while the warning indicator lights visually attract the driver's attention, enhancing the intuitiveness and effectiveness of information delivery. This dual warning method improves the efficiency of information transmission and ensures accurate communication.

[0053] Thirdly, the modular design of the controller, horn speaker, and alarm indicator components facilitates installation, maintenance, and replacement. Furthermore, the broadcast control terminal connects to each controller via communication components, forming a flexible and scalable communication network. This design allows the system to be flexibly configured and expanded based on actual needs, meeting the application requirements of various tunnel scenarios.

[0054] In one possible implementation, Figure 3 As shown, the controller includes a control module, a second communication component and a power amplifier;

[0055] The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component and the second communication component in sequence;

[0056] The first driving output end of the power amplifier is connected to each first horn loudspeaker respectively;

[0057] The first communication component is configured so that the control modules are communicatively connected to each other via the second communication component and the first communication component;

[0058] The first acquisition end of the control module is connected to the signal output end of the traffic event detector, and the second control output end is connected to the alarm indicator light.

[0059] In one possible implementation, Figure 4 As shown, the second communication component includes an optical network unit and a first optical switch;

[0060] The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component, the optical network unit and the first optical switch in sequence;

[0061] The first communication component is configured so that the communication ends of the control modules are sequentially connected to each other through the optical network unit and the first optical switch and through the first communication component.

[0062] In a possible implementation, the second acquisition end of the control module is connected to a microwave vehicle detector, and the microwave vehicle detector is arranged on the side of the tunnel.

[0063] In one possible implementation, Figure 5 As shown, the first communication component includes a second optical switch, an optical line terminal and a fiber splitter;

[0064] The broadcast control terminal is connected to the first communication end of the optical line terminal through the second optical switch;

[0065] The second communication end of the optical line terminal is connected to the main connection end of the optical fiber splitter;

[0066] The optical network unit of each controller is connected to the branch connection end of the optical fiber splitter respectively;

[0067] The optical line terminal is configured such that the communication ends of the control modules are sequentially connected to each other through the optical network unit, the first optical switch and the optical fiber splitter and through the optical line terminal;

[0068] The broadcast control terminal is connected to the communication input end of the power amplifier and the first communication end of the control module through the second optical switch, the optical line terminal, the optical fiber splitter, the optical network unit and the first optical switch in sequence.

[0069] In one possible implementation, the control module further includes a touch display module;

[0070] The communication end of the touch display module is connected to the second communication end of the control module.

[0071] In one possible implementation, the control module includes a programmable logic controller (PLC) and / or an Ethernet switch. In a specific embodiment, the PLC is connected to a communication port of the Ethernet switch. To expand the network ports when the PLC has insufficient network ports, an Ethernet switch is provided in this embodiment. The PLC is signal-connected to devices such as the optical network unit and the first optical switch via the Ethernet switch.

[0072] In one possible implementation, the tunnel entrance is provided with at least one second horn speaker with the sound signal output end facing the side away from the tunnel entrance; the input end of the second horn speaker is connected to the second driving output end of the power amplifier of the controller close to the corresponding tunnel entrance.

[0073] In one possible implementation, the effective sound transmission distance of the second horn loudspeaker is greater than 100 m.

[0074] In one possible implementation, the controller further includes a plurality of sound detectors for detecting sound pressure, wherein the sound detectors are respectively provided at audio output ends of each of the first horn speakers and each of the second horn speakers;

[0075] The third collection end of the control module is connected to the output end of the sound detector.

[0076] In a specific embodiment, the embodiments of the present invention are as follows:

[0077] Example 1

[0078] In this embodiment, a traffic incident detector is used to detect traffic accidents in a tunnel. The traffic incident detector acquires a video signal from a camera and, upon detecting an accident, outputs accident warning data (which may be a switch signal or other digital signal, without limitation herein) to a control module. The control module, in response to the accident warning data, outputs a first warning signal and transmits the signal to a broadcast control terminal via a first communication component. The broadcast control terminal, in response to the first warning signal, transmits preset first broadcast data (the data content may be, "An accident has occurred in the tunnel; please slow down and avoid the accident vehicle") to a power amplifier in each controller. The power amplifier drives the first broadcast data to be broadcast via a first horn speaker and a second horn speaker.

[0079] In this embodiment, the alarm indicator light is a three-color alarm indicator light of red, bright, and green. The control module also responds to the accident alarm data, controls the three-color alarm indicator light of red, bright, and green to light up red, and at the same time sends the accident alarm data to the control modules of other controllers through the optical line terminal; so that the control modules of other controllers respond to the accident alarm data and control the three-color alarm indicator light of red, bright, and green to light up red.

[0080] Example 2

[0081] In this embodiment, the microwave vehicle detector is mainly used to read the traffic volume and traffic speed data of each vehicle in the tunnel; when the traffic volume detected by the microwave vehicle detector is greater than the preset traffic volume value and the traffic speed is less than the preset traffic speed value, the control module outputs a second alarm signal to the broadcast control terminal. In response to the second alarm signal, the broadcast control terminal sends preset second broadcast data (the data content may be "vehicle congestion in the tunnel, please slow down") to the power amplifier in each control module. The power amplifier broadcasts the first broadcast data through the first horn speaker and the second horn speaker.

[0082] In this embodiment, the alarm indicator light is a red, bright green, and three-color alarm indicator light. When the vehicle flow detected by the microwave vehicle detector is greater than the preset flow value and the vehicle flow speed is less than the preset flow speed value, the control module controls the red, bright green, and three-color alarm indicator light to light up yellow and outputs a second alarm signal to the control module of other controllers through the optical line terminal. The other control modules respond to the second alarm signal and control the connected red, bright green, and three-color alarm indicator light to light up yellow.

[0083] This utility model uses microwave vehicle detectors to monitor the volume and speed of traffic in the tunnel in real time. It immediately triggers an early warning mechanism when it detects abnormal traffic volume (e.g., excessive traffic volume) or abnormal speed (e.g., too slow traffic). This provides timely warnings to vehicles traveling inside and outside the tunnel, reducing the likelihood of accidents.

[0084] When both the accident warning data in Example 1 and the traffic flow anomaly in Example 2 are present, the control module prioritizes responding to the accident warning data. When there is no accident warning data or traffic flow anomaly and neither the first warning signal nor the second warning signal is received, the control module controls the red and green tri-color indicator light to light green.

[0085] Example 3

[0086] In this embodiment, the first and second horn speakers should be installed on both sides of the tunnel. Evenly distributing the speakers on both sides of the tunnel ensures more uniform sound coverage within the tunnel. Drivers and passengers can hear clear and consistent audio content regardless of their location in the tunnel. This helps provide a consistent information delivery and listening experience.

[0087] Example 4

[0088] In this embodiment, the power of the second horn loudspeaker at the tunnel entrance should be greater than the power of the first horn loudspeaker.

[0089] Because the tunnel entrance horn speaker is located outside the tunnel, it is less susceptible to echo and needs to provide as much visibility as possible to vehicles approaching the tunnel. Therefore, it requires a higher output power. On highways, a safe distance between vehicles must be maintained at least 100 meters to ensure users have sufficient time to react to the vehicle ahead. Therefore, to ensure users have sufficient time to react to the broadcast, the effective transmission range of the second horn speaker in this embodiment is greater than 100 meters.

[0090] Example 5

[0091] In this embodiment, the audio output end of each of the first horn speakers and each of the second horn speakers is provided with a sound detector, which is used to detect the sound output by each horn speaker, wherein the greater the sound pressure, the greater the output voltage value of the sound detector; the sound detector sends the detected sound pressure output to the control module through the third acquisition end, and when the control module outputs the first alarm signal and / or the second alarm signal, when the collected sound pressure data is less than the preset sound pressure value, the corresponding horn speaker fails; wherein the preset sound pressure value is the minimum sound pressure of the corresponding horn speaker to meet the sound transmission requirements.

[0092] Example 6

[0093] The audio output direction of the first and second horn speakers faces the traffic flow to ensure that the sound is transmitted clearly into the car. The first and second horn speakers are both strong directional horn speakers.

[0094] Example 7

[0095] The broadcast control terminal and the control module, as well as the broadcast control terminal and the power amplifier, use OLT (Optical Line Terminal) and OTU (Optical Transport Unit) for communication.

[0096] More specifically, if Figure 5 As shown, the optical line terminal is configured to forward data (such as the first alarm signal or the second alarm signal) from a control module of a controller to the control modules of other controllers. Alternatively, the optical line terminal is configured to enable P2P (point-to-point) functionality or adopt VLAN (virtual local area network) technology to achieve communication between ONUs.

[0097] P2P Features:

[0098] After the P2P function is enabled on the OLT, the OLT can identify and forward data packets between ONUs on the same PON port.

[0099] This forwarding mechanism follows the Layer 2 switching forwarding mechanism, such as the forwarding mechanism for broadcast, unknown unicast, and known unicast.

[0100] The P2P function enables communication between ONUs to be more direct and efficient, but requires corresponding configuration and management on the OLT.

[0101] VLAN technology:

[0102] VLAN technology can divide a physically formed LAN into different logical subnets, and each logical subnet is a "virtual LAN".

[0103] Through VLAN technology, ONUs that need to communicate can be divided into the same VLAN, thereby achieving direct communication between them.

[0104] VLAN technology requires that both OLT and ONU support VLAN functions and perform corresponding VLAN configurations.

[0105] As the core equipment of the passive optical network (PON), the OLT provides high-bandwidth access suitable for large-scale, intensive data transmission. Therefore, in tunnels, the OLT can efficiently transmit various media data such as audio and video, ensuring the clarity and real-time nature of broadcast content.

[0106] By using passive optical splitters (ODNs), the OLT system reduces maintenance and energy consumption costs, while also lowering the failure rate. This reduces the overall operating cost of the system and improves economic benefits.

[0107] The OLT can centrally manage and configure all connected ONUs (Optical Network Units) or ONTs (Optical Network Terminals), simplifying network operations and maintenance. This helps achieve unified management and distribution of broadcast content and improves operation and maintenance efficiency.

[0108] In tunnels, OTUs ensure stable optical signal transmission, reduce signal attenuation and distortion, and improve broadcast quality. By increasing the dispersion tolerance of optical signals and overcoming the nonlinear effects of optical fibers, OTUs support longer transmission distances. This enables tunnel broadcast systems to deliver stable and clear broadcasts over longer tunnels. OTUs typically adhere to international standards and technical specifications, such as those established by the ITU-T, ensuring interoperability between equipment from different vendors. In tunnels, OTUs facilitate seamless equipment integration and replacement, simplifying system upgrades and maintenance.

[0109] As in Examples 1 to 7, the control module is preferably a Siemens series programmable logic controller, which has extremely strong stability and stronger environmental adaptability.

[0110] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0111] It should also be noted that, in the description of the present invention, relational terms such as first and second, etc., are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0112] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to enumerate all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A vehicle accident warning system based on synchronous broadcasting, characterized in that: include: A broadcast control terminal, a first communication component, and a plurality of controllers arranged along the roadside of the tunnel; The first control output end of the controller is connected to a plurality of first horn speakers, and the second control output end is connected to at least one warning indicator light; the first horn speakers are arranged along both sides of the tunnel road; the warning indicator light is arranged at the top of the tunnel; The first acquisition terminal of the controller is connected to a traffic event detector; the signal output terminal of the traffic event detector is connected to the first acquisition terminal of the controller, and the video acquisition terminal of the traffic event detector is connected to a camera; the camera is arranged on the top of the tunnel and the image acquisition lens of the camera faces the middle of the tunnel; The broadcast control terminal is connected to the communication terminal of each controller through the first communication component; The first communication component is configured so that the communication ends of the controllers are communicatively connected to each other through the first communication component.

2. The vehicle accident warning system according to claim 1, characterized in that: The controller includes a control module, a second communication component and a power amplifier; The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component and the second communication component in sequence; The first driving output end of the power amplifier is connected to each first horn loudspeaker respectively; The first communication component is configured so that the control modules are communicatively connected to each other via the second communication component and the first communication component; The first acquisition end of the control module is connected to the signal output end of the traffic event detector, and the second control output end is connected to the alarm indicator light.

3. The vehicle accident warning system according to claim 2, characterized in that: The second communication component includes an optical network unit and a first optical switch; The broadcast control terminal is connected to the communication input terminal of the power amplifier and the first communication terminal of the control module through the first communication component, the optical network unit and the first optical switch in sequence; The first communication component is configured so that the communication ends of the control modules are sequentially connected to each other through the optical network unit and the first optical switch and through the first communication component.

4. The vehicle accident warning system according to claim 2, characterized in that: The second acquisition end of the control module is connected to a microwave vehicle detector, and the microwave vehicle detector is arranged on the side of the tunnel road.

5. The vehicle accident warning system according to claim 3, characterized in that: The first communication component includes a second optical switch, an optical line terminal, and a fiber splitter; The broadcast control terminal is connected to the first communication end of the optical line terminal through the second optical switch; The second communication end of the optical line terminal is connected to the main connection end of the optical fiber splitter; The optical network unit of each controller is connected to the branch connection end of the optical fiber splitter respectively; The optical line terminal is configured such that the communication ends of the control modules are sequentially connected to each other through the optical network unit, the first optical switch and the optical fiber splitter and through the optical line terminal; The broadcast control terminal is connected to the communication input end of the power amplifier and the first communication end of the control module through the second optical switch, the optical line terminal, the optical fiber splitter, the optical network unit and the first optical switch in sequence.

6. The vehicle accident warning system according to claim 2, characterized in that: The controller also includes a touch display module; The communication end of the touch display module is connected to the second communication end of the control module.

7. The vehicle accident warning system according to claim 2, characterized in that: The control module includes a programmable logic controller and / or an Ethernet switch.

8. The vehicle accident warning system according to claim 2, characterized in that: At least one second horn speaker is provided at the tunnel entrance, and the sound signal output end faces the side away from the tunnel entrance; the input end of the second horn speaker is connected to the second driving output end of the power amplifier of the controller close to the corresponding tunnel entrance.

9. The vehicle accident warning system according to claim 8, characterized in that: The effective sound transmission distance of the second horn loudspeaker is greater than 100m.

10. The vehicle accident warning system according to claim 9, characterized in that: The controller further comprises a plurality of sound detectors for detecting sound pressure, wherein the sound detectors are respectively arranged at the audio output ends of each of the first horn speakers and each of the second horn speakers; The third collection end of the control module is connected to the output end of the sound detector.

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