Road dangerous case warning device and road dangerous case warning method

Through the road hazard warning device distributed along the road on the expressway, the warning area is automatically built using identity identification and wireless communication technology, which solves the problem of difficult to effectively alert dangerous situations after car accidents on the expressway and improves road safety.

CN119992877AInactive Publication Date: 2025-05-13HANGZHOU ENTROPY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510239565.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-03
Publication Date
2025-05-13
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

After a car accident on the highway, it is difficult to effectively warn of dangerous situations on the accident section, resulting in a secondary accident in the vehicle behind it due to short braking distance.

Method used

Design a road hazard warning device, including a hazard warning device distributed along the road, and each device has a built-in control unit, communication module, storage module and acousto-optical output module. Through identity identification and wireless communication, the device can automatically build a warning area when an accident occurs and issue a warning to the vehicle behind.

Benefits of technology

It effectively expands the warning area of ​​the accident section, reduces the risk of accidents caused by short braking distances in the rear vehicles, and improves road safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a road dangerous case warning device and a road dangerous case warning method, the road dangerous case warning device comprises road dangerous case warning devices which are distributed at intervals along a road advancing direction, and the inside of each road dangerous case warning device is provided with identity information and direction information corresponding to a road where the road dangerous case warning device is located, and serial numbers which are sequentially arranged on the road. The road dangerous case warning devices can be in communication connection, and any road dangerous case warning device can send out a starting signal to drive the corresponding road dangerous case warning device to work after being started. The road dangerous case warning device can establish a warning area according to warning requirements under the condition that any road dangerous case warning device is started on the basis of own communication capability and identity recognition capability, is not restricted by long-distance communication requirements, can be flexibly configured on various roads, conveniently constructs the warning area for the roads, and improves the road safety. The safety driving degree of other vehicles on an accident road section is greatly improved, and accident expansion is avoided.
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Description

Technical Field

[0001] The present invention relates to a road hazard warning technology, and in particular to a road hazard warning device and a road hazard warning method. Background Art

[0002] On the highway, although the traffic conditions are relatively simple, there is no interference from pedestrians and non-motor vehicles, and the speed is relatively fast, once a car accident occurs, the consequences are often more serious. The difficulty of rescue in car accidents on highways is also relatively large, because the accident site may be far away from the city, and it takes longer for rescue personnel to arrive. Before the arrival of rescue, the dangerous situation of the accident section needs to be effectively warned. In actual traffic activities, the dangerous situation of the accident section will only be transmitted to the high-speed vehicles behind by the situation that the vehicles heading to the accident site slow down and queue up. If the driver of the vehicle behind the accident does not judge the slow-moving convoy or stopped vehicle in front, the travel distance within the line of sight may not be enough for the rear vehicle to implement effective braking operations, and the rear vehicle will have an accident due to the short braking distance. Such a warning process has a small range of action and is prone to secondary traffic accidents. Summary of the invention

[0003] The technical problem to be solved by the present invention is how to construct a warning area on an accident road, thereby providing a road danger warning device.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: the road hazard warning device includes road hazard warning devices distributed at intervals along the direction of road travel, the road hazard warning device includes a shell, a control unit, a power supply unit, a communication module, a storage module, a manual input module, and an acoustic and optical output module, the control unit, the power supply unit, the communication module, the storage module, the manual input module, and the acoustic and optical output module are all located in the shell, the power supply unit, the communication module, the storage module, the manual input module, and the acoustic and optical output module are all connected to the control unit and controlled by the control unit, the control unit, the communication module, the storage module, the manual input module, and the acoustic and optical output module are all connected to the power supply unit and provided by the power supply unit power supply, the communication module is at least used for communication connection with the communication modules of other road danger warning devices, and the communication module can also be used for communication connection with network equipment, the storage module is provided with the main road section identity, the main road travel direction, the main road travel sequence number, the secondary road section identity, the secondary road travel direction, and the secondary road travel sequence number, the main road section identity or the secondary road section identity of the adjacent road danger warning device is the same, the main road travel direction or the secondary road travel direction of the adjacent road danger warning device is the same, and the main road travel sequence number or the secondary road travel sequence number of the adjacent road danger warning device is sequentially arranged in the road travel direction, the manual input module is used for manually starting or manually deactivating the road danger warning device, and the sound and light output module is used for issuing warning content in a sound and light manner.

[0005] The road hazard warning device is set up according to the road, and it consists of multiple road hazard warning devices. The road hazard warning device serves the traffic function of a road. The road hazard warning device is internally provided with identity information corresponding to the road, direction information, and a sequence number of the order in which it is arranged on the road. The road hazard warning devices can be connected for communication, and any road hazard warning device can send out an activation signal to drive the corresponding road hazard warning device to work after being activated. In this way, by activating a road hazard warning device in the accident section, other road hazard warning devices serving the road can be prompted to enter the state of issuing warning content, and the road hazard warning device that issues the warning content constructs a warning area on the road.

[0006] Since the response relationship between road hazard warning devices on the same road is not subject to the online central control mode, that is, it is constrained by the server, that is, it does not rely on a single control center, but benefits from the local autonomous control method of the road hazard warning device to actively identify the identity, direction, and serial number. The road hazard warning device can be deployed in remote areas with poor communication conditions that cannot access the Internet or are inconvenient to access the management platform, and can be used to build warning areas on temporary roads.

[0007] In addition to being used on roads, especially highways, the road hazard warning device of the present invention can also provide hazard warnings for industrial plants and internal passages of buildings, especially in the corridors of office buildings with relatively closed spaces. Based on the road hazard warning device of the present invention, a precise and flexibly arranged warning area can be constructed.

[0008] The road hazard warning device is manually activated or deactivated. In order to allow the area where the road hazard warning device is controlled to intersect with the area where the road hazard warning device issues warning content, the manual input module is provided with an activation button and a cancel button, and the sound and light output module is provided with a warning light and a speaker. The activation button and the cancel button are both located on the same side of the shell, and the warning light and the speaker are distributed on the edge of the shell.

[0009] In addition to being triggered by the manual input module, the road hazard warning device can also be triggered by responding to a work request of a local operation through wireless communication, and can also be triggered by responding to a work request of a remote operation through wireless communication.

[0010] The shutdown or startup operation of the road danger warning device is independent of the aforementioned manual operation of issuing the warning content, so as to avoid misoperation or improper operation. The power supply unit is provided with a switch button, which is located directly below the housing. The switch button is away from the enable button and the cancel button.

[0011] The road hazard warning device can be operated in a local autonomous control mode, with flexible layout and precise control, and can also obtain a larger and more precise warning area through grouping. To this end, the present invention provides a method for operating the above-mentioned road hazard warning device.

[0012] In the road danger warning method, road danger warning devices are distributed at intervals along the road travel direction, each road danger warning device is internally configured with information of the main road segment identity, the main road travel direction, the main road travel sequence number, the secondary road segment identity, the secondary road travel direction, and the secondary road travel sequence number, the main road travel sequence numbers of adjacent road danger warning devices on the same road are sequentially arranged, the main road travel sequence number of the road danger warning device located at the position where the secondary road merges into the main road is arranged according to the arrangement position sequence of the road danger warning device on the main road, and the secondary road travel sequence number is arranged according to the last position sequence of the road danger warning device on the secondary road,

[0013] In the first step, when the road danger warning device is triggered, an activation signal and a warning content are issued, and the road danger warning device that issues the activation signal is recorded as the calling road danger warning device. The activation signal includes the main road section identity, the main road travel direction, the main road travel sequence number, the secondary road section identity, the secondary road travel direction, and the secondary road travel sequence number.

[0014] In the second step, after the other road danger warning devices receive the activation signal, when the main road segment identity of the other road danger warning devices is different from the main road segment identity or the secondary road segment identity of the calling road danger warning device, the other road danger warning devices maintain a silent state and execute the sixth step.

[0015] When the main road segment identity of the other road danger warning devices is the same as the main road segment identity or the secondary road segment identity of the calling road danger warning device, the next step is executed.

[0016] Step 3: When the main road direction of other road danger warning devices is different from the main road direction or the secondary road direction of the calling road danger warning device, the other road danger warning devices remain silent.

[0017] When the main road direction of the other road danger warning devices is the same as the main road direction or the secondary road direction of the calling road danger warning device, the next step is executed.

[0018] Step 4: When the main road sequence number or the secondary road sequence number of the calling road danger warning device is greater than the main road sequence number of other road danger warning devices, and the difference between the main road sequence number or the secondary road sequence number of the calling road danger warning device and the main road sequence number of other road danger warning devices is less than or equal to N, the other road danger warning devices issue warning content.

[0019] When the main road sequence number of the calling road danger warning device is smaller than the main road sequence number of other road danger warning devices, the other road danger warning devices remain silent and execute the next step.

[0020] Step 5: When the other road danger warning device that has issued the warning content contains the identity of the secondary road section, the other road danger warning device that has issued the warning content sends a call-in signal, and the call-in signal includes the identity of the secondary road section, the secondary road travel direction, and the secondary road travel sequence number.

[0021] Step 6: If other road danger warning devices do not receive the call-in signal within the specified time, other road danger warning devices remain silent.

[0022] When the main road segment identity of other road danger warning devices that receive the call-in signal within the specified time is consistent with the secondary road segment identity of the call-in signal, the main road travel direction of the other road danger warning devices is consistent with the secondary road travel direction of the call-in signal, the main road travel sequence number of the other road danger warning devices is less than the secondary road travel sequence number of the call-in signal, and the difference between the secondary road travel sequence number of the call-in signal and the main road travel sequence number of the other road danger warning devices is less than or equal to M, the other road danger warning devices issue a warning content, where M is equal to N minus the difference between the main road travel sequence number of the calling road danger warning device and the main road travel sequence number of the other road danger warning device that issues the call-in signal, and M is less than N.

[0023] Here, N and M are both natural numbers. N means that there are N number of road danger warning devices, including the calling road danger warning device and the road danger warning device located upstream of the road danger warning device in the direction of travel, that need to issue warning content. M means that there are M number of road danger warning devices on the secondary road merging into the main road that need to issue warning content.

[0024] The operation of the road danger warning device based on the above method can meet the danger warning requirements of the main road, the secondary road and the road structure where the secondary road merges into the main road. The warning area can cover a single road and an intersecting road, thereby significantly improving the range and accuracy of the warning area of ​​the road danger warning device.

[0025] The initialization rules of the road danger warning device are set based on the general operating habits. After the calling road danger warning device is turned off, the road danger warning device that issued the warning content returns to the silent state. In this way, the turning off operation and the initialization operation are combined, making the use of the road danger warning device consistent with the general operating habits of the public, so that anyone can easily get started.

[0026] In order to facilitate information management, the road danger warning method can also establish a more extensive warning effect based on network communication conditions. Therefore, a danger processing server with a receiving address for receiving danger warning information can be configured for the road danger warning device, the calling road danger warning device is connected to the danger processing server for communication, the calling road danger warning device uploads an activation signal to the danger processing server, and the danger processing server sends the danger warning information according to the preset receiving address for receiving danger warning information.

[0027] The present invention adopts the above-mentioned technical solution: the road hazard warning device can establish a warning area according to the warning needs based on its own communication capability and identity recognition capability when any road hazard warning device is enabled. It is not constrained by long-distance communication requirements and can be flexibly configured on various roads. It can conveniently build a warning area for the road, greatly improve the safe driving level of other vehicles on the accident section, and avoid the expansion of the accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Figure 1 A circuit function diagram of the road danger warning device of the present invention;

[0030] Figure 2 A three-dimensional diagram of the road danger warning device of the present invention;

[0031] Figure 3 The figure is a schematic diagram of the use of the road danger warning device of the present invention. DETAILED DESCRIPTION

[0032] The road danger warning device comprises a plurality of road danger warning devices, and the road danger warning devices are distributed at intervals along the traveling direction of the road.

[0033] Each road hazard warning device is an independent individual, such as Figure 1 , 2As shown, it includes a housing 1 and a control unit 2, a power supply unit 3, a communication module 4, a storage module 5, a manual input module 6, and an audio-visual output module 7 arranged in the housing 1. The power supply unit 3, the communication module 4, the storage module 5, the manual input module 6, and the audio-visual output module 7 are all connected to the control unit 2 and controlled by the control unit 2. The control unit 2, the communication module 4, the storage module 5, the manual input module 6, and the audio-visual output module 7 are all connected to the power supply unit 3 and are powered by the power supply unit 3; the power supply unit 3 is provided with a switch button 12, and the road danger warning device can be turned off or on by pressing the switch button 12, and the switch button 12 is located directly below the housing 1. The communication module 4 can be used to communicate with the communication modules 4 of other road danger warning devices to realize the communication connection between the road danger warning devices. The storage module 5 is provided with the main road segment identity, main road travel direction, main road travel sequence number, secondary road segment identity, secondary road travel direction, and secondary road travel sequence number; the main road segment identity or secondary road segment identity of the adjacent road danger warning device is the same, the main road travel direction or secondary road travel direction of the adjacent road danger warning device is the same, and the main road travel sequence number or secondary road travel sequence number of the adjacent road danger warning device is sequentially arranged in the road travel direction. Figure 2 As shown, the manual input module 6 is provided with an activation button 8 and a cancel button 9. Pressing the activation button 8 activates the road danger warning device to issue a warning content and an activation signal, and pressing the cancel button 9 deactivates the road danger warning device to stop issuing the warning content. The manual input module 6 is used to manually activate or manually deactivate the road danger warning device. The sound and light output module 7 is provided with a warning light 10 and a speaker 11. The warning light 10 can work in a flashing mode, and the speaker 11 can issue a warning sound. The sound and light output module 7 is used to issue the warning content in a sound and light mode. The activation button 8 and the cancel button 9 are both located on the same side of the housing 1, and the warning light 10 and the speaker 11 are distributed on the edge of the housing 1.

[0034] After the road hazard warning devices are arranged along the road, the main road section identity, main road travel direction, main road travel sequence number, secondary road section identity, secondary road travel direction, and secondary road travel sequence number of each road hazard warning device need to be configured.

[0035] The main road travel numbers of adjacent road hazard warning devices on the same road are set in sequence, the main road travel numbers of road hazard warning devices located at the position where the secondary road merges into the main road are set according to the arrangement position sequence of the road hazard warning devices on the main road, and the secondary road travel numbers are set according to the last position sequence of the road hazard warning devices on the secondary road.

[0036] In the present technical solution, the identification rules of the main road segment identity and the secondary road segment identity are that any road itself is recorded as the main road segment identity, and any other road that merges into the road is recorded as the secondary road segment identity. For example, if road B merges into road A in the direction of travel, then the main road segment identity of the road hazard warning device distributed on road A is recorded as "Road A"; if the road hazard warning device distributed on road A happens to be located at the intersection where road B merges into road A, the road hazard warning device has not only the main road segment identity but also the secondary road segment identity. This road segment identity corresponds to road B and is recorded as "Road B". The main road travel direction and the secondary road travel direction refer to the directions of travel allowed for the vehicle on the road, which can be set using the direction of the destination, such as heading towards location C. The sequential setting of the main road travel sequence number and the secondary road travel sequence number means that the sequence number changes in an incremental manner in the direction of travel. Such as Figure 3 As shown, the main road is provided with road hazard warning devices M201, M202, and M203 at intervals, and the secondary road is provided with road hazard warning device S19. When configuring the initialization information, the main road segment identity, main road travel direction, main road travel sequence number, secondary road segment identity, secondary road travel direction, and secondary road travel sequence number of the road hazard warning device M201 are respectively "Road A", "Driving to Location C", "201", "None", "None", and "None"; the main road segment identity, main road travel direction, main road travel sequence number, secondary road segment identity, secondary road travel direction, and secondary road travel sequence number of the road hazard warning device M202 are respectively "Road A", "Driving to Location C", "202", "Road B", "Driving to Location C", "203", "Road B", "Driving to Location C", "204", "Road B", "Driving to Location C", "205", "Road B", "Driving to Location C", "206", "Road B", "Driving to Location C", "207", "Road B", "Driving to Location C", "208", "Road B", "Driving to Location C", "209", "Road B", "Driving to Location C", "201", "None", "None", and "None". The information of the main road section identity, main road traveling direction, main road traveling sequence number, secondary road section identity, secondary road traveling direction, and secondary road traveling sequence number of the road hazard warning device M203 are "Road A", "Driving to Location C", "203", "None", "None", and "None" respectively; the information of the main road section identity, main road traveling direction, main road traveling sequence number, secondary road section identity, secondary road traveling direction, and secondary road traveling sequence number of the road hazard warning device S19 are "Road B", "Driving to Location C", "19", "None", "None", and "None" respectively.

[0037] After the road hazard warning device is arranged, each road hazard warning device can be operated according to the following method.

[0038] In the first step, when the road danger warning device is triggered, an activation signal and a warning content are issued, and the road danger warning device that issued the activation signal is recorded as the calling road danger warning device, and the activation signal includes the main road segment identity, the main road travel direction, the main road travel sequence number, the secondary road segment identity, the secondary road travel direction, and the secondary road travel sequence number. In the second step, after other road danger warning devices receive the activation signal, when the main road segment identity of other road danger warning devices is different from the main road segment identity or the secondary road segment identity of the calling road danger warning device, the other road danger warning devices maintain a silent state and execute the sixth step; when the main road segment identity of other road danger warning devices is the same as the main road segment identity or the secondary road segment identity of the calling road danger warning device, the next step is executed. Step 3: When the main road travel direction of other road danger warning devices is different from the main road travel direction or the secondary road travel direction of the calling road danger warning device, the other road danger warning devices remain silent; when the main road travel direction of other road danger warning devices is the same as the main road travel direction or the secondary road travel direction of the calling road danger warning device, the next step is executed. Step 4: When the main road travel sequence number or the secondary road travel sequence number of the calling road danger warning device is greater than the main road travel sequence number of other road danger warning devices, and the difference between the main road travel sequence number or the secondary road travel sequence number of the calling road danger warning device and the main road travel sequence number of other road danger warning devices is less than or equal to N, the other road danger warning devices issue warning content; when the main road travel sequence number of the calling road danger warning device is less than the main road travel sequence number of other road danger warning devices, the other road danger warning devices remain silent and the next step is executed. In the fifth step, when the other road danger warning device that has issued the warning content contains the secondary road segment identity, the other road danger warning device that has issued the warning content sends a call-in signal, and the call-in signal includes the secondary road segment identity, the secondary road travel direction, and the secondary road travel sequence number. Step 6: When other road danger warning devices do not receive the call-in signal within the specified time, other road danger warning devices maintain a silent state; when the main road segment identity of other road danger warning devices that receive the call-in signal within the specified time is consistent with the secondary road segment identity of the call-in signal, the main road travel direction of other road danger warning devices is consistent with the secondary road travel direction of the call-in signal, the main road travel sequence number of other road danger warning devices is less than the secondary road travel sequence number of the call-in signal, and the difference between the secondary road travel sequence number of the call-in signal and the main road travel sequence number of other road danger warning devices is less than or equal to M, other road danger warning devices issue warning content, M is equal to N minus the difference between the main road travel sequence number of the calling road danger warning device and the main road travel sequence number of other road danger warning devices that issue the call-in signal, and M is less than N. The specified time here is achieved by delay setting. When the calling road danger warning device is turned off, the road danger warning device that issues the warning content returns to a silent state after failing to receive an activation signal.

[0039] In addition to the above embodiments, a more extensive warning function can also be established based on network communication conditions. For example, a road danger warning device of a road danger warning device is equipped with a danger handling server, which is placed in an office area and can be connected to all road danger warning devices. In this way, the communication module of the road danger warning device is also used to communicate with the danger handling server. Before use, a receiving address for receiving danger warning information is pre-set on the danger handling server. When the calling road danger warning device is connected to the danger handling server for communication and the calling road danger warning device uploads an activation signal to the danger handling server, the danger handling server sends the danger warning information according to the pre-set receiving address for receiving danger warning information. In this way, the situation on the scene can be transmitted to areas outside the scene and people in the area through the network.

Claims

1. A road danger warning device, characterized in that: The road danger warning device comprises road danger warning devices which are spaced apart along the direction of travel of the road. The road danger warning device comprises a housing (1), a control unit (2), a power supply unit (3), a communication module (4), a storage module (5), a manual input module (6), and an acoustic and optical output module (7). The control unit (2), the power supply unit (3), the communication module (4), the storage module (5), the manual input module (6), and the acoustic and optical output module (7) are all located in the housing (1). The power supply unit (3), the communication module (4), the storage module (5), the manual input module (6), and the acoustic and optical output module (7) are all connected to the control unit (2) and are controlled by the control unit (2). ), and the sound and light output module (7) are connected to the power supply unit (3) and are powered by the power supply unit (3); the communication module (4) is at least used for communicating with the communication modules (4) of other road danger warning devices; the storage module (5) is provided with a main road segment identity, a main road travel direction, a main road travel sequence number, a secondary road segment identity, a secondary road travel direction, and a secondary road travel sequence number; the main road segment identities or secondary road segment identities of adjacent road danger warning devices are the same, the main road travel directions or secondary road travel directions of adjacent road danger warning devices are the same, and the main road travel sequence numbers or secondary road travel sequence numbers of adjacent road danger warning devices are arranged in sequence in the road travel direction; the manual input module (6) is used for manually starting or manually stopping the road danger warning device; and the sound and light output module (7) is used for issuing warning content in a sound and light manner.

2. The road danger warning device according to claim 1, characterized in that: The manual input module (6) is provided with an activation button (8) and a cancel button (9), and the sound and light output module (7) is provided with a warning light (10) and a loudspeaker (11); the activation button (8) and the cancel button (9) are both located on the same side of the housing (1), and the warning light (10) and the loudspeaker (11) are distributed on the edge of the housing (1).

3. The road danger warning device according to claim 1 or 2, characterized in that: The power supply unit (3) is provided with a switch button (12), and the switch button (12) is located directly below the housing (1).

4. A road danger warning method, characterized in that: Road danger warning devices are distributed at intervals along the direction of travel of the road. Each road danger warning device is configured with information such as the main road segment identity, main road travel direction, main road travel sequence number, secondary road segment identity, secondary road travel direction, and secondary road travel sequence number. The main road travel sequence numbers of adjacent road danger warning devices on the same road are set in sequence. The main road travel sequence number of the road danger warning device located at the position where the secondary road merges into the main road is set in sequence according to the arrangement position of the road danger warning device on the main road, and the secondary road travel sequence number is set in sequence according to the last position of the road danger warning device on the secondary road. In the first step, when the road danger warning device is triggered, an activation signal and a warning content are issued, and the road danger warning device that issues the activation signal is recorded as the calling road danger warning device. The activation signal includes the main road section identity, the main road travel direction, the main road travel sequence number, the secondary road section identity, the secondary road travel direction, and the secondary road travel sequence number. In the second step, after the other road danger warning devices receive the activation signal, when the main road segment identity of the other road danger warning devices is different from the main road segment identity or the secondary road segment identity of the calling road danger warning device, the other road danger warning devices maintain a silent state and execute the sixth step. When the main road segment identity of the other road danger warning devices is the same as the main road segment identity or the secondary road segment identity of the calling road danger warning device, the next step is executed. Step 3: When the main road direction of other road danger warning devices is different from the main road direction or the secondary road direction of the calling road danger warning device, the other road danger warning devices remain silent. When the main road direction of the other road danger warning devices is the same as the main road direction or the secondary road direction of the calling road danger warning device, the next step is executed. Step 4: When the main road sequence number or the secondary road sequence number of the calling road danger warning device is greater than the main road sequence number of other road danger warning devices, and the difference between the main road sequence number or the secondary road sequence number of the calling road danger warning device and the main road sequence number of other road danger warning devices is less than or equal to N, the other road danger warning devices issue warning content. When the main road sequence number of the calling road danger warning device is smaller than the main road sequence number of other road danger warning devices, the other road danger warning devices remain silent and execute the next step. Step 5: When the other road danger warning device that has issued the warning content contains the identity of the secondary road section, the other road danger warning device that has issued the warning content sends a call-in signal, and the call-in signal includes the identity of the secondary road section, the secondary road travel direction, and the secondary road travel sequence number. Step 6: If other road danger warning devices do not receive the call-in signal within the specified time, other road danger warning devices remain silent. When the main road segment identity of other road danger warning devices that receive the call-in signal within the specified time is consistent with the secondary road segment identity of the call-in signal, the main road travel direction of the other road danger warning devices is consistent with the secondary road travel direction of the call-in signal, the main road travel sequence number of the other road danger warning devices is less than the secondary road travel sequence number of the call-in signal, and the difference between the secondary road travel sequence number of the call-in signal and the main road travel sequence number of the other road danger warning devices is less than or equal to M, the other road danger warning devices issue a warning content, where M is equal to N minus the difference between the main road travel sequence number of the calling road danger warning device and the main road travel sequence number of the other road danger warning device that issues the call-in signal, and M is less than N.

5. The road danger warning method according to claim 4, characterized in that: After the calling road danger warning device is turned off, the road danger warning device that issued the warning content returns to the silent state.

6. The road danger warning method according to claim 4, characterized in that: A danger handling server having a receiving address for receiving danger warning information is configured for the road danger warning device. The calling road danger warning device is communicatively connected with the danger handling server. The calling road danger warning device uploads an activation signal to the danger handling server. The danger handling server sends the danger warning information according to the pre-set receiving address for receiving danger warning information.