Road collapse early warning system based on hybrid circuit communication

Abstract

The utility model discloses a road collapse early warning system based on hybrid circuit communication, which is characterized in that a wire network is laid below a road, and when the road collapses and leads to wire breakage, the early warning system immediately detects the abnormity and triggers an early warning signal device; therefore, vehicles behind and other road users are reminded of collapse danger in front in time, the vehicles are prevented from falling into pits, and secondary accidents are reduced to the maximum extent. According to the system, collapse detection and early warning are completed through electric signals, and therefore the defects of an existing system in environmental protection and maintenance cost are overcome. In the aspects of management and monitoring, the system uses the high-efficiency and centralized concepts of a subway control center for reference, and the real-time communication capability is ensured by connecting a communication module with a signal lamp, so that a manager can receive accurate information about a target collapse site in real time and quickly send an alarm to a related traffic management and emergency response team, and the traffic safety is improved. Therefore, resources can be effectively allocated and rescue actions can be effectively commanded in an emergency.

Description

Technical Field

[0001] This utility model belongs to the field of road collapse early warning systems, and relates to a road collapse early warning system based on hybrid circuit communication. Background Technology

[0002] With the rapid expansion of urban roads, road subsidence has become a common and serious urban safety problem. In recent years, subsidence accidents caused by changes in geological conditions, aging underground pipelines, or human factors have occurred frequently in cities, posing a serious threat to traffic safety and the personal safety of citizens. Especially when a road subsidence occurs, vehicles behind are unable to see the subsidence ahead in time, which can easily lead to secondary accidents, causing more serious casualties and property damage.

[0003] Existing road subsidence detection technologies typically rely on costly sensing equipment and complex maintenance measures. These methods are not only slow to react but also ineffective at providing timely early warnings, failing to promptly alert oncoming vehicles after a subsidence occurs. Furthermore, existing technologies often lack flexibility, unable to adapt to different road conditions and lengths, limiting their applicability in various environments. With the continuous optimization of urban road construction, subsidence accidents caused by underground cavities, geological structure changes, and other factors are becoming increasingly frequent, necessitating a simple yet highly sensitive road subsidence early warning system to effectively ensure the safety of vehicles and pedestrians. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing technologies are unable to effectively provide early warning information in a short period of time, resulting in the inability to effectively warn vehicles behind after a collapse occurs. This invention provides a road collapse early warning system based on hybrid circuit communication.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model proposes a road collapse early warning system based on hybrid circuit communication, which includes wires, system power supply, first power supply, first relay, first alarm and communication module;

[0007] The positive terminal of the system power supply is connected to the first pin of the first relay; the negative terminal of the system power supply is connected to a wire, the other end of which is connected to the second pin of the first relay; the third pin of the first relay is connected to the negative terminal of the first power supply; the fourth pin of the first relay is connected to a first resistor; the fifth pin of the first relay is connected to the first alarm and the communication module in sequence; the other end of the first resistor and the other end of the communication module are both connected to the positive terminal of the first power supply.

[0008] Preferably, a second relay is connected between the wire and the second pin of the first relay;

[0009] The third pin of the second relay is connected to the negative terminal of the second power supply, the fourth pin of the second relay is connected to the second resistor, the fifth pin of the second relay is connected to the second alarm, and the other end of the second resistor and the other end of the second alarm are both connected to the positive terminal of the second power supply.

[0010] Preferably, a third relay is connected between the wire and the second pin of the second relay;

[0011] The third pin of the third relay is connected to the negative terminal of the third power supply, the fourth pin of the third relay is connected to the third resistor, the fifth pin of the third relay is connected to the third alarm, and the other end of the third resistor and the other end of the third alarm are both connected to the positive terminal of the third power supply.

[0012] Preferably, the installation distances of the first alarm, the second alarm, and the third alarm are determined based on the vehicle's reaction braking distance.

[0013] Preferably, the first alarm, the second alarm, and the third alarm are all audible and visual alarms.

[0014] Preferably, the audible and visual alarm consists of a flashing alarm light and a horn with adjustable volume.

[0015] Preferably, the LED chips of the strobe alarm light are LED patches.

[0016] Preferably, the lampshade of the strobe alarm light is made of PS material.

[0017] Preferably, the wire is an aluminum alloy cable.

[0018] Preferably, the communication module is a LoRa communication module.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention proposes a road collapse early warning system based on electrical wires. The basic principle of the track circuit is that current propagates along the track path; when the track is damaged, the circuit is broken, immediately activating an early warning signal. Similarly, this circuit involves laying a network of electrical wires beneath the road. When a road collapse causes the wires to break, the early warning system immediately detects this anomaly and triggers the early warning signal device, thus promptly alerting vehicles and other road users to the danger of a collapse ahead, preventing vehicles from falling into the pothole and minimizing secondary accidents. In terms of design, this system relies on electrical signals for collapse detection and early warning, without generating pollutants, thus addressing the shortcomings of existing systems in terms of environmental protection and maintenance costs. Regarding management and monitoring, the system draws on the efficiency and centralized concept of subway control centers, using communication modules connected to traffic lights to ensure real-time communication capabilities. This allows management personnel to receive accurate information about the target collapse location immediately and quickly send alerts to relevant traffic management and emergency response teams, thereby enabling effective resource allocation and command of rescue operations in emergency situations.

[0021] Furthermore, the audible and visual alarm provides local audible and visual warning signals to promptly alert road users to road collapses ahead. The LoRa communication module handles remote communication, rapidly transmitting road collapse alarm information to the road management center via a low-power wide-area network. The audible and visual alarm, combined with LoRa wireless communication, forms a dual protection mechanism integrating local early warning and remote monitoring, significantly improving road user safety and the timeliness of accident response.

[0022] Furthermore, the strobe warning light is used to convey a clear visual warning signal to the driver. The lamp beads are mainly made of LED chips, and the lamp cover is made of PS material, which has a certain degree of heat resistance and impact resistance, and can provide good light diffusion effect. The adjustable volume horn provides an audible alarm, with a decibel adjustment range of 75-130db to adapt to different road environments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall structural diagram of the early warning system of this utility model.

[0025] Figure 2 This is a diagram illustrating the implementation effect of this utility model.

[0026] Figure 3 This is a schematic diagram of the laying of electrical wires in newly constructed roads according to this utility model.

[0027] Figure 4 This is a schematic diagram of the communication module of this utility model.

[0028] Wherein, V - system power supply, V1 - first power supply, V2 - second power supply, V3 - third power supply, S1 - first relay, S2 - second relay, S3 - third relay, R1 - first resistor, R2 - second resistor, R3 - third resistor, L - communication module, A1 - first alarm, A2 - second alarm, A3 - third alarm. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings:

[0036] This utility model proposes a road collapse early warning system based on hybrid circuit communication, such as... Figure 1 As shown, it includes wires, system power supply V, first power supply V1, second power supply V2, third power supply V3, first relay S1, second relay S2, third relay S3, first alarm A1, second alarm A2, third alarm A3 and communication module L;

[0037] The positive terminal of the system power supply V is connected to the first pin of the first relay S1; the negative terminal of the system power supply V is connected to a wire, and the other end of the wire is connected to the second pin of the first relay S1; the third pin of the first relay S1 is connected to the negative terminal of the first power supply V1; the fourth pin of the first relay S1 is connected to the first resistor R1; the fifth pin of the first relay S1 is connected to the first alarm A1 and the communication module L in sequence; the other end of the first resistor R1 and the other end of the communication module L are both connected to the positive terminal of the first power supply V1.

[0038] A second relay S2 is connected between the wire and the second pin of the first relay S1; the third pin of the second relay S2 is connected to the negative terminal of the second power supply V2; the fourth pin of the second relay S2 is connected to the second resistor R2; the fifth pin of the second relay S2 is connected to the second alarm A2; and the other end of the second resistor R2 and the other end of the second alarm A2 are both connected to the positive terminal of the second power supply V2.

[0039] A third relay S3 is connected between the wire and the second pin of the second relay S2; the third pin of the third relay S3 is connected to the negative terminal of the third power supply V3, the fourth pin of the third relay S3 is connected to the third resistor R3, the fifth pin of the third relay S3 is connected to the third alarm A3, and the other end of the third resistor R3 and the other end of the third alarm A3 are both connected to the positive terminal of the third power supply V3.

[0040] Preferably, the installation distances of the first alarm A1, the second alarm A2, and the third alarm A3 are determined based on the vehicle's reaction braking distance.

[0041] The audible and visual alarm consists of a flashing alarm light and an adjustable-volume horn. The flashing alarm light uses LED chips, and its cover is made of PS material. The adjustable-volume horn has a decibel adjustment range of 75-130 dB.

[0042] The early warning system proposed in this utility model includes the following steps in the material preparation stage:

[0043] 1) Wire selection:

[0044] Since the electrical wire of this invention should be buried in the complex environment beneath roads, special consideration must be given to the selection of the wire material to ensure that it maintains stable performance and safety under long-term burial conditions. Based on its corrosion resistance, resistance to traffic loads, conductivity, anti-aging properties, and resistance to external interference, aluminum alloy is chosen as the conductor material with significant advantages.

[0045] Aluminum alloy conductors incorporate alloying elements such as copper, iron, magnesium, and silicon into pure aluminum, significantly improving their mechanical properties, corrosion resistance, and creep resistance. This helps them withstand the stresses from road traffic loads, making them more suitable for harsh conditions in long-term buried environments. Furthermore, aluminum alloys are lightweight, facilitating transportation and construction. Compared to traditional copper conductors, they are more economical and easier to install, achieving a conductivity of 61%-62% that of copper conductors. This ensures efficient power transmission while reducing overall project costs. Therefore, aluminum alloy cables offer significant performance and economic advantages in road collapse early warning systems, making them an ideal choice for achieving a balance between performance and cost.

[0046] 2) Selection of alarm devices:

[0047] In this invention, the selection of the alarm device must ensure effective alerting of the driver to the danger of road collapse both day and night, while avoiding damage to the driver's eyesight. Therefore, this design employs an audible and visual alarm to ensure a multi-sensory warning effect and enhance safety. An LED red light is used as the primary warning light, featuring a gentle color temperature design and reflective materials to ensure clear visibility even in strong sunlight. Two different flashing frequencies are set for ordinary roads and highways respectively to adapt to different road conditions. The first frequency band (40 to 80 flashes / min) is suitable for ordinary roads, while the second frequency band (200 to 300 flashes / min) is suitable for highways. The dynamic visibility distance of the warning light is greater than 300 meters, ensuring sufficient reaction time for the driver and further improving road safety.

[0048] To adapt to different road environments, the volume of the audible and visual alarm is designed to be adjustable to cope with varying noise backgrounds and driving conditions. The volume range of the alarm device is designed from 65 dB to 130 dB. For urban roads and ordinary highways, the volume is set between 65 dB and 85 dB, which is sufficient to penetrate ambient noise and ensure that the alarm can be heard, but not too harsh to avoid disturbing pedestrians or residents. For highways or noisy environments, the volume can be increased to 85 dB to 130 dB to cope with the noise of high-speed driving and ensure that the driver can hear the alarm in time and react accordingly. In extreme emergency situations, the short-term alarm volume can reach up to 130 dB to ensure that the driver can still hear the alarm clearly and take timely evasive action even when the vehicle is traveling at high speed or in a noisy environment.

[0049] 3) Communication module selection:

[0050] Lora technology, with its advantages of ultra-long-distance transmission, strong anti-interference capability, and low cost, can adapt to various complex road environments, including urban roads, highways, and mountainous sections with weak signals. In this design, the Lora communication module is closely connected with the audible and visual alarm to form an automated road collapse early warning and information transmission system.

[0051] Once a road fracture or collapse is detected, the circuitry of the audible and visual alarm system returns to normal operation, emitting audible and visual signals to alert drivers to the danger ahead. Simultaneously, the LoRa communication module automatically activates upon power-up and immediately sends pre-stored road fault information to the backend management system. To ensure road management personnel are informed of collapses immediately, the LoRa module stores pre-written road information. For example, when a fault occurs on section 2 of Xiaozhai East Road, the LoRa module automatically sends the preset message "Fault has occurred on section 2 of Xiaozhai East Road" to the backend computer. In this way, management personnel can quickly ascertain the specific location of the collapse and promptly dispatch maintenance personnel for on-site handling.

[0052] On the other hand, LoRa modules support a maximum communication range of up to 10 kilometers in open areas, enabling them to cover a wide monitoring area. This feature is ideal for real-time early warning of multiple road segments on highways and can effectively penetrate buildings and electromagnetic interference in urban environments, ensuring timely transmission of fault information. Furthermore, LoRa's anti-interference design performs excellently in environments with high electromagnetic noise, ensuring stable information transmission. Cost-effectiveness is also a major advantage of LoRa modules; their low power consumption not only reduces hardware procurement costs but also minimizes long-term energy consumption, making them suitable for large-scale deployments, especially in road monitoring in remote mountainous areas.

[0053] The detailed wiring layout of the early warning system proposed in this utility model is as follows:

[0054] The layout of the detection circuit wires needs to take into account the actual road conditions. This utility model adopts different layout schemes for existing roads and newly built roads, and sets up multiple circuit detection intervals to monitor the road conditions in real time.

[0055] For existing roads, the installation of power lines needs to minimize damage to the original road. Therefore, the two power lines are to be installed on the road shoulder or on both sides of the drainage ditch, with a burial depth of 0.8m.

[0056] For newly constructed roads, the laying of power lines is carried out simultaneously with road construction, embedding the power lines into the roadbed material. The power lines are laid in the middle of the outermost lane in each direction of traffic.

[0057] The length of road subsidence detection zones should differ for highways and other roads. For highways (where the detection zone can be extended as needed), due to the longer road sections and higher vehicle speeds, a detection zone length of 1000 meters is recommended. For other road types, factors such as area, traffic volume, and road mileage need to be considered. In densely networked urban areas, it is recommended to set up one detection point every 2-3 intersections.

[0058] The alarm system proposed in this utility model is installed as follows:

[0059] Audible and visual alarms and wireless communication devices are installed at the initial section of the road collapse detection zone. By setting up multi-level audible and visual alarms, drivers are ensured to receive road collapse information in a timely manner. The installation distance between the alarms is determined based on the vehicle's reaction braking distance, calculated using the following formula:

[0060]

[0061] In the formula: s is the reaction braking distance, v is the vehicle speed, t is the reaction time (taken as 1.5s), and a is the braking acceleration (taken as 10). ).

[0062] The speed limit for vehicles on highways is 30 km / h. The reaction braking distance is 90m; the vehicle speed on urban roads is 14. The reaction braking distance is 10m.

[0063] For highways, three audible and visual alarms are installed at the beginning of each detection section, spaced 90 meters apart. All alarms are mounted on the side of the road, supported by poles, at a height of 3 meters above the ground. A LoRa communication module is installed along with the first audible and visual alarm in each detection section to ensure timely and effective information transmission.

[0064] The functions of each component in the early warning system proposed in this utility model are as follows:

[0065] System power supply: As the core power supply module of the system, it is responsible for providing stable power support for the entire early warning system.

[0066] Relays: Relays are mainly used to control the switching of a system. When a road collapse or other abnormal situation occurs, the relay will switch the corresponding circuit and trigger emergency response mechanisms such as audible and visual alarms.

[0067] Aluminum alloy cables: Aluminum alloy cables are used as the medium for road integrity testing. Due to their corrosion resistance, conductivity, and anti-aging properties, they are more suitable for harsh conditions in long-term buried environments.

[0068] LoRa Communication Module: The LoRa communication module is used to transmit locally stored data text to a remote monitoring center, enabling cloud communication functionality.

[0069] Audible and visual alarm: When the system detects that the road may collapse, the relay switch connects the power supply to the equipment. This module sends a warning signal to the personnel on site through the audible and visual alarm device, prompting them to take preventive measures immediately, thus realizing the local early warning function.

[0070] First power supply, second power supply and third power supply: provide stable power support for LoRa communication module and sound and light alarm, and ensure that these critical modules can work normally in the event of an emergency.

[0071] Figure 2 The diagram illustrates a driver's gaze at the audible and visual warning lights while driving. The driver's eye level is 1.3m. According to the standard "Requirements and Measurement Methods for Forward Visibility of Motor Vehicle Drivers," the head rotation angle is 2° when the driver observes a target in the horizontal plane of their eyes, and the driver's reaction time is 1.5s. Assuming the vehicle is traveling at a speed of 120km / h, the reaction distance is 50m, therefore the barrier height of the device is 3m. On the other hand, the vehicle's braking distance is 90m. To ensure that the driver has sufficient reaction time, three audible and visual alarms are continuously installed at 90m intervals.

[0072] For existing roads, the detection circuit is buried on the road shoulder or both sides of the drainage ditch at a depth of 0.8m, and the early warning device is installed at the beginning of the detection section. A three-tiered early warning system is implemented: Level 1 warning points are equipped with audible and visual alarms and LoRa wireless communication devices to ensure timely local warnings and transmission of collapse information to the road monitoring center in the event of a road collapse; Level 2 and 3 warning points are equipped with audible and visual alarms to provide multiple warnings in case drivers do not receive the initial warning. The audible and visual alarms and LoRa communication devices are fixed to iron poles at the edge of the road, 3m above the ground.

[0073] For newly constructed roads, such as Figure 3 As shown, the detection circuit is buried in the middle of lanes 1 and 4, and is installed after the roadbed material is laid. The installation of the early warning device is consistent with the installation of existing road early warning devices. This utility model provides one-way early warning for road collapse; the same circuit and early warning device can be used for warning in the opposite direction.

[0074] The LoRa communication module consists of a PCB circuit board with an embedded LoRa module to ensure text transmission. Four status indicator lights are mounted on the surface of the casing. The power indicator light remains constantly lit after power is connected. When data is being received or transmitted at the serial port on the bottom of the device, the indicator lights on the transmitting and receiving ends light up respectively. Two signal interfaces are provided on the bottom of the device, capable of receiving RS232 and RS485 signals respectively, enabling transparent data transmission and adapting to any standard or non-standard user protocol.

[0075] Figure 4The demonstration showcases the workflow of the LoRa communication module at the early warning device pole. This system, through LoRa nodes and a LoRa gateway, enables remote monitoring of multiple roads. When a road section collapses, the communication node for that section automatically activates, sending pre-stored road section text information to the gateway. The data is then uploaded to the cloud platform and ultimately received and processed by the monitoring center. This design features wide coverage, real-time monitoring, and low power consumption, making it suitable for large-scale road safety early warning systems.

[0076] Therefore, the basic working principle of the early warning system proposed in this utility model is as follows: When the road is intact, the relay is energized, current flows through the coil to generate a magnetic field, the magnetic field attracts the iron core to move, and drives the switch contacts to close, thus opening the main circuit; when the road collapses, the detection circuit is disconnected, the relay loses its magnetic field due to the open circuit, the iron core resets, the early warning system circuit is open, and the early warning device immediately works, implementing local early warning and remote information transmission. When the road condition is normal, the laid lines remain open, the relay generates a magnetic field, causing the early warning device circuit to be disconnected while the main circuit is open. When the road collapses, the lines are disconnected due to physical reasons, the relay magnetic field disappears, the early warning device circuit is open, local early warning is implemented, and road collapse information is sent to the monitoring center. Compared with the prior art, this utility model has the following technical effects:

[0077] A) This utility model road collapse early warning system detects the integrity of the road by using conductive wires buried in the road. When the road collapses, the early warning system is immediately triggered because the circuit is broken. It has high detection sensitivity and can quickly respond to changes in road structure.

[0078] B) This utility model road collapse early warning system uses wires and simple devices to realize collapse detection and early warning, without the need for expensive sensors or complex detection equipment, and the installation and maintenance costs are low.

[0079] C) This utility model road collapse early warning system can be flexibly adjusted according to different road conditions and lengths, and is suitable for various road conditions and environments.

[0080] D) This utility model road collapse early warning system can activate the early warning the moment a road collapses, and remind passing vehicles through sound and light prompts, effectively avoiding secondary disasters that may be caused after the collapse.

[0081] E) This utility model road collapse early warning system adopts a pure circuit design, relying on electrical signals to realize collapse detection and early warning, and will not generate pollutants.

[0082] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A road collapse early warning system based on hybrid circuit communication, characterized in that, Includes electrical wires, system power supply, first power supply, first relay, first alarm, and communication module; The positive terminal of the system power supply is connected to the first pin of the first relay; the negative terminal of the system power supply is connected to a wire, the other end of which is connected to the second pin of the first relay; the third pin of the first relay is connected to the negative terminal of the first power supply; the fourth pin of the first relay is connected to a first resistor; the fifth pin of the first relay is connected to the first alarm and the communication module in sequence; the other end of the first resistor and the other end of the communication module are both connected to the positive terminal of the first power supply.

2. The road collapse early warning system based on hybrid circuit communication according to claim 1, characterized in that, A second relay is connected between the wire and the second pin of the first relay; The third pin of the second relay is connected to the negative terminal of the second power supply, the fourth pin of the second relay is connected to the second resistor, the fifth pin of the second relay is connected to the second alarm, and the other end of the second resistor and the other end of the second alarm are both connected to the positive terminal of the second power supply.

3. The road collapse early warning system based on hybrid circuit communication according to claim 2, characterized in that, A third relay is connected between the wire and the second pin of the second relay; The third pin of the third relay is connected to the negative terminal of the third power supply, the fourth pin of the third relay is connected to the third resistor, the fifth pin of the third relay is connected to the third alarm, and the other end of the third resistor and the other end of the third alarm are both connected to the positive terminal of the third power supply.

4. The road collapse early warning system based on hybrid circuit communication according to claim 3, characterized in that, The installation distances of the first alarm, the second alarm, and the third alarm are determined based on the vehicle's reaction braking distance.

5. The road collapse early warning system based on hybrid circuit communication according to claim 3, characterized in that, The first, second, and third alarms are all audible and visual alarms.

6. The road collapse early warning system based on hybrid circuit communication according to claim 5, characterized in that, The audible and visual alarm consists of a flashing alarm light and a speaker with adjustable volume.

7. The road collapse early warning system based on hybrid circuit communication according to claim 6, characterized in that, The LED chips in the strobe alarm light are surface-mount LEDs.

8. The road collapse early warning system based on hybrid circuit communication according to claim 6, characterized in that, The lampshade of the strobe alarm light is made of PS material.

9. The road collapse early warning system based on hybrid circuit communication according to claim 1, characterized in that, The wire is an aluminum alloy cable.

10. The road collapse early warning system based on hybrid circuit communication according to claim 1, characterized in that, The communication module is a LoRa communication module.

Images