Guardrail state monitoring system and method based on multimode communication

Abstract

The invention relates to the technical field of data processing, and discloses a guardrail state monitoring system and method based on multimode communication, and the system comprises the steps: receiving a guardrail node state sent by each guardrail state monitoring terminal through a guardrail state monitoring gateway, generating road accident information, and evaluating the grade of a road accident; the road accident level and the endurance electric quantity value in the guardrail state information are sent to a guardrail state monitoring cloud, and the road accident level and the endurance electric quantity value in the guardrail state information are converged into the topological graph according to the road historical traffic flow of the target area and the maintenance time of the current guardrail maintenance period; and controlling the corresponding guardrail state monitoring terminal to execute the display of road traffic warning information on the basis of the principle of meeting the traffic flow descending proportion, the guardrail maintenance cycle endurance requirement and the residual endurance electric quantity value uniformity. Therefore, by ensuring that the endurance of the guardrail state monitoring terminal meets the maintenance period requirement, the self-relieving capability of urban roads facing traffic accidents is improved, and the contradiction between the traffic guidance function operation and the endurance guarantee is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a guardrail status monitoring system and method based on multi-mode communication. Background Art

[0002] Guardrail condition monitoring is a traffic sensing technology developed to meet the needs of urban road traffic management. Its core is to integrate condition monitoring equipment (sensors, communication modules), traffic indicator panels, and a hybrid power supply system with self-storage batteries and solar energy on the guardrail. This system enables real-time monitoring of the guardrail's physical condition (collision, tilt, etc.), indirectly capturing the occurrence of road accidents and providing critical accident information for urban road traffic status monitoring. The hybrid power supply design of solar energy and self-storage batteries aims to supplement power through daytime solar energy, extend battery life, reduce guardrail maintenance frequency, and ensure the long-term stability of the monitoring equipment in performing routine guardrail condition monitoring tasks. This, in turn, lays the foundation for the rapid detection of urban road accidents and the implementation of subsequent traffic improvement measures.

[0003] In the practical application of road accident detection and traffic guidance, road guardrail status monitoring faces a significant dilemma between functional implementation and system endurance. On the one hand, the energy storage capacity of existing self-storage battery and solar hybrid power supply systems is limited, and can only support the monitoring equipment to complete routine guardrail status monitoring. However, activating the traffic indicator panel (used to guide surrounding vehicles to detour) when an accident occurs consumes a large amount of additional electricity, directly shortening the battery life of the monitoring terminal. On the other hand, to avoid frequent maintenance causing interference to road traffic, it is necessary to ensure that the batteries of all guardrail monitoring terminals in the area can be replaced within the prescribed maintenance cycle. This requires that when executing the traffic guidance function, it is necessary to reduce the traffic volume on the accident road through the indicator panel, and to consider the remaining battery life of monitoring terminals at different locations in real time, balancing the relationship between function activation (traffic guidance) and endurance guarantee (maintenance cycle). Ultimately, this brings great difficulties to the stability of guardrail status monitoring, the rapid response efficiency after accident detection, and the effective coverage of traffic guidance.

[0004] Therefore, how to achieve high-precision road guardrail status monitoring, accurate road accident detection, and reasonable selection of road traffic guidance information display location and display period, while ensuring that the battery life of the guardrail status monitoring terminal meets the maintenance cycle requirements, improve the self-mitigation ability of urban roads when facing traffic accidents, avoid further congestion on accident roads that lead to rescue and ambulance vehicles being blocked, and reduce road traffic efficiency due to long-term congestion on accident roads, is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present invention provides a guardrail status monitoring system and method based on multi-mode communication, aiming to solve at least one of the above technical problems.

[0006] To achieve the above object, the present invention provides a guardrail status monitoring method based on multi-mode communication, comprising the following steps: The guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; According to the guardrail node identification and the guardrail posture parameters in the guardrail status information, the guardrail status of each guardrail node in the target area is determined to generate road accident information; Extract the accident location and type from the accident information to generate an accident grade. This grade and the battery life value of each guardrail node in the guardrail status information are sent to the guardrail status monitoring cloud. This cloud generates road traffic warning information based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle. The guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

[0007] Optionally, before the guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, the method further includes: Based on the environmental information of the area where each guardrail node is located in the target area, a guardrail status monitoring terminal with a communication module that meets the communication characteristics is configured for each guardrail node; wherein the communication module includes a Zigbee communication module, a LoRa communication module, and a 433MHz radio frequency module; According to the configuration position of each guardrail status monitoring terminal, several guardrail status monitoring gateways using multi-mode communication are set up in the target area; wherein, the guardrail status monitoring gateway is configured to have a Zigbee receiving module, a LoRa receiving module and a 433MHz receiving module, and is equipped with a UART interface for data transmission between the Zigbee receiving module and the 433MHz receiving module and an SPI interface for data transmission between the 433MHz receiving module and the LoRa receiving module.

[0008] Optionally, each guardrail status monitoring terminal is equipped with a guardrail status sensor and a solar-powered energy storage module; The guardrail status sensor is configured as a six-axis sensor with tilt change monitoring function and acceleration monitoring function, and the solar power supply energy storage module is configured to include an energy storage battery, a solar panel and a solar charging energy storage management circuit; Among them, the guardrail status information includes the guardrail inclination change parameters, guardrail acceleration parameters collected by the guardrail status sensor, and power endurance parameters output by the solar charging energy storage management circuit.

[0009] Optionally, the guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, specifically including: Each guardrail status monitoring terminal extracts guardrail status information from the guardrail status information stream collected by the guardrail status sensor, and sends the guardrail status information and the endurance power value output in real time by the solar charging energy storage management circuit to the guardrail status monitoring gateway; The guardrail status monitoring gateway determines the guardrail node identifier and guardrail status information sent by the guardrail status monitoring terminal based on the binding relationship between the communication module and the corresponding guardrail status monitoring terminal for the guardrail status information and battery life value from different communication modules.

[0010] Optionally, the step of determining the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information and generating the road accident information specifically includes: Using the guardrail inclination change parameters and guardrail acceleration parameters received from each guardrail node, abnormal state nodes are extracted from several guardrail nodes in the target area; Based on the guardrail inclination change parameters, guardrail acceleration parameters and guardrail node identification of each abnormal state node, which are pre-stored in the guardrail state monitoring gateway, a road accident guardrail feature set is constructed, and the road accident guardrail feature set is input into the road accident prediction model to identify the road accident location and road accident type in the target area; Generate road accident information based on the road accident location and road accident type in the target area.

[0011] Optionally, extracting the road accident location and road accident type from the road accident information, generating a road accident grade, and sending the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud step specifically includes: Extracting the road accident location and road accident type from the road accident information, and generating a road accident grade based on a preset mapping table of road accident elements and road traffic efficiency reduction ratios; The road traffic efficiency reduction ratio and the battery life value of each guardrail node in the guardrail status information are used as road traffic alarm signals for road accidents and sent to the guardrail status monitoring cloud.

[0012] Optionally, the guardrail status monitoring cloud generates a road traffic warning information step based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle, specifically including: The guardrail status monitoring cloud obtains a historical traffic flow inflow topology map of the target area; wherein the historical traffic flow inflow topology map records the traffic flow inflow ratio of a number of inflow roads of each road at different times; The guardrail status monitoring cloud calculates the battery life value of each guardrail node according to the received road traffic alarm signal, the power consumption value of the guardrail status monitoring terminal of each guardrail node in the first unit time when the road traffic guidance display is executed and the power consumption value of the second unit time when the road traffic guidance display is not executed, and the maintenance time of the current guardrail maintenance cycle; The guardrail status monitoring cloud estimates the road accident handling period based on the road accident level in the received road traffic alarm signal. Taking into account the current traffic flow ratio of several incoming roads and the reduction in road traffic efficiency of the road where the road accident is located, the cloud plans the associated roads and the execution period for the road traffic guidance display among the several associated roads of the road where the road accident is located. The first constraint condition is that the sum of the traffic flow inflow ratios of the associated roads at the current moment of the several guardrail nodes planned to perform road traffic guidance display at each moment during the road accident handling period is not less than the road traffic efficiency reduction ratio of the road where the road accident location is located. The second constraint condition is that the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle. The variance of the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period is used as the optimization objective function. The associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are used as a decision variable combination. A genetic algorithm is used to encode the decision variable combination into a chromosome. Through iterative screening of multiple generations of chromosomes, the chromosome that meets the first constraint condition and the second constraint condition and has the highest fitness determined based on the inverse of the optimization objective function is selected for decoding, and the associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are obtained to generate the optimal road traffic warning strategy. Based on the associated roads for executing the road guidance display and the execution period of the road guidance display in the road warning strategy, road warning information including road guidance display information is generated and sent to several guardrail status monitoring terminals on the associated roads.

[0013] Optionally, the remaining battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle, specifically: the battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display minus the road traffic guidance display power consumption value determined by the duration of the corresponding execution period within the road accident handling period and the first unit time power consumption value is greater than the normal power consumption value of the guardrail status monitoring determined by the duration of the period from after the road accident handling period to before the maintenance time of the current guardrail maintenance cycle and the second unit time power consumption value.

[0014] Optionally, the guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to perform the road traffic guidance display step, specifically including: The guardrail status monitoring cloud sends the associated roads for executing the road traffic guidance display and the execution period of the road traffic guidance display in the road traffic warning information to the guardrail status monitoring terminal of the corresponding associated guardrail node via the guardrail status monitoring gateway; The guardrail status monitoring terminal is driven to control the road traffic warning information display device configured at the guardrail node to display relevant road traffic guidance information for detouring the road where the road accident location is located.

[0015] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a guardrail status monitoring system based on multi-mode communication, comprising: A receiving module is used for the guardrail status monitoring gateway to receive the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; A judgment module is used to judge the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information, and generate road accident information; A generation module is used to extract the road accident location and road accident type from the road accident information, generate a road accident grade, and send the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud. The guardrail status monitoring cloud generates road traffic warning information based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle; The display module is used for the guardrail status monitoring cloud to send the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

[0016] The beneficial effects of the present invention are as follows: a guardrail status monitoring system and method based on multi-mode communication is proposed, which receives the guardrail node status sent by each guardrail status monitoring terminal through the guardrail status monitoring gateway, generates road accident information and evaluates the road accident level, and then sends the road accident level and the battery life value in the guardrail status information to the guardrail status monitoring cloud. According to the road historical traffic flow in the target area, the topological map and the maintenance time of the current guardrail maintenance cycle are collected, and based on the principle of meeting the traffic flow reduction ratio, the guardrail maintenance cycle battery life requirements and the uniformity of the remaining battery life value, the corresponding guardrail status monitoring terminal is controlled to execute the display of road traffic warning information. Therefore, the present invention solves the contradiction between the operation of the traffic guidance function and the battery life guarantee by ensuring that the battery life of the guardrail status monitoring terminal meets the maintenance cycle requirements, improving the self-mitigation ability of urban roads when facing traffic accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a flow chart of a guardrail status monitoring method based on multi-mode communication according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of a guardrail status monitoring system based on multi-mode communication according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The embodiment of the present invention provides a guardrail status monitoring method based on multi-mode communication, referring to Figure 1 , Figure 1 The figure is a flow chart of a guardrail status monitoring method based on multi-mode communication according to an embodiment of the present invention.

[0020] In this embodiment, a guardrail status monitoring method based on multi-mode communication includes the following steps: S1: The guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; S2: Determine the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information, and generate road accident information; S3: Extract the accident location and type from the accident information, generate an accident grade, and send the accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud. The guardrail status monitoring cloud generates a road traffic warning message based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle. S4: The guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

[0021] It should be noted that in the actual application of road accident detection and traffic guidance, road guardrail status monitoring faces a significant contradiction between function realization and system endurance: on the one hand, the energy storage capacity of the existing self-storage battery and solar hybrid power supply system is limited, which can only support the monitoring equipment to complete routine guardrail status monitoring. When an accident occurs, activating the traffic indicator panel (used to guide surrounding vehicles to detour) will consume a large amount of additional electricity, directly shortening the battery life of the monitoring terminal; on the other hand, to avoid frequent maintenance causing interference to road traffic, it is necessary to ensure that the batteries of all guardrail monitoring terminals in the area can be replaced within the prescribed maintenance period. This requires that when executing the traffic guidance function, it is necessary to reduce the traffic volume on the accident road through the indicator panel, and to consider the remaining battery life of the monitoring terminals at different locations in real time, and balance the relationship between function activation (traffic guidance) and endurance guarantee (maintenance period). Ultimately, it brings great difficulties to the stability of guardrail status monitoring, the rapid response efficiency after accident detection, and the effective coverage of traffic guidance.

[0022] In order to solve the above problems, this embodiment receives the guardrail node status sent by each guardrail status monitoring terminal through the guardrail status monitoring gateway, generates road accident information and evaluates the road accident level, and then sends the road accident level and the battery life value in the guardrail status information to the guardrail status monitoring cloud. According to the historical traffic flow of the target area's road into the topology map and the maintenance time of the current guardrail maintenance cycle, based on the principle of meeting the traffic flow reduction ratio, the guardrail maintenance cycle battery life requirements and the uniformity of the remaining battery life value, the corresponding guardrail status monitoring terminal is controlled to execute the display of road traffic warning information. Therefore, the present invention solves the contradiction between the operation of the traffic guidance function and battery life guarantee by ensuring that the battery life of the guardrail status monitoring terminal meets the maintenance cycle requirements, improving the self-mitigation ability of urban roads when facing traffic accidents.

[0023] In a preferred embodiment, before the guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, the method further includes: S01: Based on the environmental information of the area where each guardrail node is located in the target area, a guardrail status monitoring terminal having a communication module that meets the communication characteristics is configured for each guardrail node; wherein the communication module includes a Zigbee communication module, a LoRa communication module, and a 433MHz radio frequency module; S02: According to the configuration position of each guardrail status monitoring terminal, several guardrail status monitoring gateways using multi-mode communication are set up in the target area; wherein, the guardrail status monitoring gateway is configured to have a Zigbee receiving module, a LoRa receiving module and a 433MHz receiving module, and is configured with a UART interface for data transmission between the Zigbee receiving module and the 433MHz receiving module and an SPI interface for data transmission between the 433MHz receiving module and the LoRa receiving module.

[0024] In this embodiment, first, according to the deployment environment of each guardrail node (such as obstruction intensity, electromagnetic interference, and spacing), an adaptive communication module is configured for its monitoring terminal (Zigbee is suitable for densely obstructed areas, LoRa is suitable for open and long-distance areas, and 433MHz is suitable for medium-distance and strong penetration areas). Then, according to the geographical distribution of the terminals, multi-mode communication gateways are reasonably deployed in the target area. The gateways need to integrate the receiving modules (Zigbee / LoRa / 433MHz receiving modules) corresponding to the terminal modules and configure matching hardware interfaces (UART interface for Zigbee and 433MHz module data transmission, SPI interface for 433MHz and LoRa module data transmission) to ensure that the gateway is compatible with receiving terminal data from different modules.

[0025] For example, Zigbee communication modules are configured for guardrail terminals in the old urban area within the target area (dense high-rise buildings, severe obstruction, and guardrail spacing of 50m); LoRa communication modules are configured for terminals on urban expressways within the target area (open and unobstructed, guardrail spacing of 2km); and 433MHz radio frequency modules are configured for terminals under overpasses in the target area (strong obstruction, moderate electromagnetic interference, and guardrail spacing of 100m). On this basis, a multi-mode gateway is deployed every 1km in the old urban area, every 3km on the expressway, and every 500m in the tunnel. The gateway receives Zigbee / 433MHz data through the UART interface and receives LoRa / 433MHz data through the SPI interface to ensure that terminal data in the entire area is received without omission.

[0026] Therefore, this embodiment avoids the problems of weak signal and high bit error caused by the application of a single communication module by adopting a multi-module communication method, realizes stable adaptation of communication links in different environments, and at the same time reduces the number of gateway deployments through multi-mode gateways, thereby reducing hardware costs.

[0027] In a preferred embodiment, each guardrail status monitoring terminal is equipped with a guardrail status sensor and a solar-powered energy storage module; The guardrail status sensor is configured as a six-axis sensor with tilt change monitoring function and acceleration monitoring function, and the solar power supply energy storage module is configured to include an energy storage battery, a solar panel and a solar charging energy storage management circuit; Among them, the guardrail status information includes the guardrail inclination change parameters, guardrail acceleration parameters collected by the guardrail status sensor, and power endurance parameters output by the solar charging energy storage management circuit.

[0028] In this embodiment, by configuring a six-axis sensor for each monitoring terminal, the posture changes (tilt angle) and impact intensity (acceleration) of the guardrail can be collected simultaneously, achieving accurate perception of collision, tilt and other conditions. At the same time, a solar-powered energy storage module is configured, including an energy storage battery as an energy storage carrier, a solar panel as an energy input source, and a solar charging energy storage management circuit for charging protection and power distribution, to ensure long-term and stable power supply to the terminal in outdoor scenarios. The guardrail status information uploaded by the terminal must include the posture parameters (tilt angle change, acceleration) collected by the six-axis sensor and the endurance power parameters output by the management circuit, providing complete data support for subsequent decision-making.

[0029] For example, by configuring the MPU6050 six-axis sensor at the highway guardrail terminal, when the vehicle slightly scratches the guardrail, the sensor detects a tilt change of 5° and an acceleration of 1.2g, which is judged as a "minor abnormality"; when the vehicle hits the guardrail, it detects a tilt change of 30° and an acceleration of 8g, which is judged as a "serious abnormality". Through the 18V / 10W solar panel and 12V / 20Ah energy storage battery configured in the terminal, the charging management circuit converts solar energy into electrical energy storage during the day and supplies power to the battery at night, ensuring that the terminal can still work normally without light for 40 consecutive days, and uploads the endurance power parameters to the gateway in real time.

[0030] Therefore, this embodiment, based on the setting of the guardrail status sensor and the solar-powered energy storage module, can improve the accuracy of guardrail status perception, reduce single parameter misjudgment, extend terminal life, and reduce the frequency of manual maintenance.

[0031] In a preferred embodiment, the guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, specifically including: S11: Each guardrail status monitoring terminal extracts guardrail status information from the guardrail status information stream collected by the guardrail status sensor, and sends the guardrail status information and the endurance power value output in real time by the solar charging energy storage management circuit to the guardrail status monitoring gateway; S12: The guardrail status monitoring gateway determines the guardrail node identifier and guardrail status information sent by the guardrail status monitoring terminal based on the binding relationship between the communication module and the corresponding guardrail status monitoring terminal, based on the guardrail status information and battery life value from different communication modules.

[0032] In this embodiment, first, the guardrail status monitoring terminal extracts the effective guardrail status information (such as the inclination angle change value and the acceleration peak value) from the original information stream collected by the six-axis sensor, and packages it with the battery life value output in real time by the solar charging energy storage management circuit, and sends it to the gateway through its own configured communication module. After receiving the data, the gateway reversely determines the guardrail node identification and complete status information corresponding to each segment of data based on the preset binding relationship between the communication module and the monitoring terminal (such as the Zigbee module binding terminal HB-021 and the LoRa module binding terminal HB-035), to avoid confusion between data from different terminals.

[0033] In a preferred embodiment, the steps of determining the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information and generating road accident information specifically include: S21: using the received guardrail inclination change parameter and guardrail acceleration parameter of each guardrail node, extracting abnormal status nodes from a number of guardrail nodes in the target area; S22: Based on the guardrail inclination change parameter, guardrail acceleration parameter, and guardrail node position information pre-stored in the guardrail status monitoring gateway of each abnormal state node, a road accident guardrail feature set is constructed, and the road accident guardrail feature set is input into the road accident prediction model to identify the road accident location and road accident type in the target area; S23: Generate road accident information according to the road accident location and road accident type in the target area.

[0034] In this embodiment, first, based on the inclination change parameters and acceleration parameters of each guardrail node, abnormal nodes with status exceeding normal thresholds (such as inclination > 15° and acceleration > 3g) are screened out. Then, the posture parameters of each abnormal node (specific values ​​of inclination and acceleration) and the node position information pre-stored in the gateway are combined to construct a "road accident guardrail feature set" (including abnormal node location, abnormality degree, and distribution density). The feature set is input into a pre-trained road accident prediction model. The road accident prediction model is based on road accident guardrail features extracted from historical road accident data and road accident location, accident type and other data. By matching the road accident guardrail features with the highest similarity, the road accident location and accident type closest to the current accident condition are selected from historical road accidents. Finally, the recognition results are integrated to generate road accident information containing the core elements of the accident.

[0035] For example, after receiving data, the gateway of a secondary trunk road in a certain city screened out three adjacent nodes HB-041, HB-042, and HB-043 as abnormal nodes (with inclination angles of 22°, 28°, and 25°, and accelerations of 6g, 7.5g, and 6.8g, respectively). Combined with the pre-stored location information (the three nodes are continuously distributed along XX Road, with a spacing of 50m each), a feature set was constructed and input into the accident prediction model. The model matched the features of "three consecutive nodes with high inclination angles and high acceleration" in the historical data, identified the accident location as "the main road 50m away from XX Road", and the accident type as "multiple vehicles continuously hitting the guardrail", and generated complete accident information. By fusion of multiple parameters and matching historical data, the accuracy of accident detection and positioning precision were improved, ensuring the integrity of accident information.

[0036] In a preferred embodiment, the steps of extracting the road accident location and road accident type from the road accident information, generating a road accident grade, and sending the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud specifically include: S31: extracting the road accident location and road accident type from the road accident information, and generating a road accident grade based on a preset mapping table of road accident elements and road traffic efficiency reduction ratios; S32: The road traffic efficiency reduction ratio and the battery life value of each guardrail node in the guardrail status information are used as a road traffic alarm signal for a road accident and sent to the guardrail status monitoring cloud.

[0037] In this embodiment, the accident location (e.g., main road / secondary road) and accident type (e.g., minor scrape / serious collision) are first extracted from road accident information. Based on a pre-set mapping table of road accident factors and traffic efficiency reduction ratios (e.g., a multi-vehicle collision on a main road corresponds to a 60% traffic efficiency reduction, and a single-vehicle scrape on a secondary road corresponds to a 20% reduction), the accident factors are converted into a quantifiable traffic efficiency reduction ratio. This then generates a standardized road accident grade (e.g., a reduction in efficiency greater than 50% is considered a Level 1 accident, 30%-50% is considered a Level 2 accident, and less than 30% is considered a Level 3 accident). Finally, the traffic efficiency reduction ratio and the battery life value of each guardrail node are integrated into a road traffic alarm signal, which is sent to the guardrail status monitoring cloud, providing key parameters for cloud-based traffic guidance planning. This achieves a unified standard for accident grades, eliminating the subjectivity of manual judgments. Furthermore, the battery life is incorporated into the alarm signal, ensuring that cloud-based decision-making takes device battery life into account, preventing premature terminal battery failure caused by guidance displays.

[0038] On this basis, the guardrail status monitoring cloud generates road traffic warning information according to the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle. The specific steps include: S33: The guardrail status monitoring cloud obtains a historical traffic flow inflow topology map of the target area; wherein the historical traffic flow inflow topology map records the traffic flow inflow ratios of a plurality of inflow roads of each road at different times; S34: The guardrail status monitoring cloud receives the battery life value of each guardrail node in the received road traffic alarm signal, the power consumption value of the guardrail status monitoring terminal of each guardrail node when executing the road traffic guidance display for a first unit time and the power consumption value of the guardrail status monitoring terminal when not executing the road traffic guidance display for a second unit time, and the maintenance time of the current guardrail maintenance cycle; S35: The guardrail status monitoring cloud estimates the road accident handling period based on the road accident level in the received road traffic alarm signal, taking into account the current traffic flow ratio of several incoming roads on the road where the road accident is located and the reduction ratio of road traffic efficiency on the road where the road accident is located, and plans the associated roads and the execution period of the road traffic guidance display for the several associated roads of the road where the road accident is located; S36: The first constraint condition is that the sum of the traffic flow inflow ratios of the associated roads at the current moment of the several guardrail nodes planned to perform road traffic guidance display at each moment during the road accident handling period is not less than the road traffic efficiency reduction ratio of the road where the road accident location is located. The second constraint condition is that the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle. The variance of the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period is used as the optimization objective function. The associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are used as a decision variable combination. A genetic algorithm is used to encode the decision variable combination into a chromosome. Through iterative screening of multiple generations of chromosomes, the chromosome that meets the first constraint condition and the second constraint condition and has the highest fitness determined based on the inverse of the optimization objective function is selected for decoding, and the associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are obtained, thereby generating an optimal road traffic warning strategy. S37: Based on the associated roads for executing the road guidance display and the execution period of the road guidance display in the road guidance warning strategy, generate road warning information including road guidance display information and send it to several guardrail status monitoring terminals of the associated roads.

[0039] In this embodiment, the historical traffic flow inflow topology map of the target area is first obtained through the cloud (recording the proportion of traffic flow inflow to each road in different time periods, such as 30% of traffic flow from the XX branch road to the main road during the morning rush hour). The inflow data in the historical traffic flow inflow topology map of the road can be estimated based on the direction and number of vehicles passing during the typical period of sampling detection at the traffic checkpoint (for example, through image acquisition and AI recognition). Then, combined with the battery life of each node in the alarm signal, the power consumption of the first unit time for terminal execution display (such as 50mAh / h), the power consumption of the second unit time for non-execution display (such as 10mAh / h), the current maintenance cycle (such as 15 days remaining), and then the accident handling period (such as 2 hours) is estimated. Combined with the current proportion of traffic flow inflow and the incident According to the ratio of decrease in traffic efficiency of the accident road, the associated roads (such as possible detour roads) and display time periods are preliminarily planned. The sum of the traffic flow merging ratios of the associated roads ≥ the ratio of decrease in efficiency of the accident road (to ensure the diversion effect, such as the merging ratio ≥ 65%) is taken as the first constraint. The remaining power of the node after display meets the maintenance cycle endurance (to ensure that the equipment can be used until the next maintenance) is taken as the second constraint. With "minimizing the variance of the remaining power of each node" (to avoid excessive power consumption of some nodes) as the optimization goal, a genetic algorithm is used to select the chromosome with the highest fitness determined by the inverse of the optimization objective function that meets the first and second constraints, and decodes and solves the optimal solution, generates the optimal road traffic warning strategy, and finally generates road traffic warning information including associated roads, display time periods, and guidance content based on the strategy.

[0040] It is easy to understand that this embodiment obtains road traffic warning information including related roads, display time periods, and guidance content through optimization algorithm solution. It can ensure effective traffic diversion in the accident area while avoiding insufficient terminal endurance due to execution display, reduce the frequency of manual maintenance, and achieve the optimal balance between diversion effect and equipment endurance.

[0041] In a preferred embodiment, the remaining battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle, specifically: the battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display minus the road traffic guidance display power consumption value determined by the duration of the corresponding execution period within the road accident handling period and the first unit time power consumption value is greater than the normal power consumption value of the guardrail status monitoring determined by the duration of the period from after the road accident handling period to before the maintenance time of the current guardrail maintenance cycle and the second unit time power consumption value.

[0042] It should be noted that this embodiment clearly defines the marking of battery life usage that meets the current guardrail maintenance cycle: the current battery life power value (in mAh) of the guardrail terminal planned to execute display, minus the execution display period length × the first unit time power consumption value (total power consumption in the display stage), the result must be greater than the remaining period length from the accident handling period to the maintenance time × the second unit time power consumption value (total power consumption in the normal monitoring stage), the formula can be expressed as: current power - (display duration × first power consumption) > (remaining maintenance period × second power consumption), to ensure that the terminal can still support the next maintenance after executing the display, to avoid power outages.

[0043] In a preferred embodiment, the guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to perform the road traffic guidance display step, specifically including: S41: The guardrail status monitoring cloud sends the associated roads and the execution period of the road traffic guidance display in the road traffic warning information to the guardrail status monitoring terminal of the corresponding associated guardrail node via the guardrail status monitoring gateway; S42: driving the guardrail status monitoring terminal to control the road traffic warning information display device configured at the guardrail node to execute the display of relevant road traffic guidance information for detouring the road where the road accident location is located.

[0044] In this embodiment, the guardrail status monitoring cloud forwards the associated road signs, display time periods, and guidance content (such as detour directions) in the road traffic warning information to the monitoring terminal of the corresponding associated guardrail node via the guardrail status monitoring gateway. After receiving the instruction, the terminal drives the road traffic warning information display device (such as LED indicator panel, electronic screen) configured on the guardrail through the internal control module, and displays the detour guidance information for the accident road according to the specified time period (such as "Accident on XX road ahead, it is recommended to detour to XX branch road"), completing the physical implementation of the traffic guidance, ensuring that the diversion plan generated in the cloud can be accurately transmitted to the associated guardrail terminal, and guiding vehicles to detour through visual display, directly improving the traffic diversion efficiency in the accident area.

[0045] Therefore, the present invention proposes a guardrail status monitoring method based on multi-mode communication, which adapts to different environments through multi-mode communication to ensure stable data transmission, improves perception accuracy and equipment endurance through six-axis sensors and solar power supply, and balances traffic diversion effect and maintenance cost through dual-constraint optimization of traffic diversion and equipment endurance, ultimately significantly shortening accident response time, reducing the risk of secondary congestion in the accident area, reducing the probability of rescue vehicles being blocked, and reducing the maintenance frequency of guardrail monitoring terminals, thereby improving the overall traffic operation resilience and management efficiency of urban roads. While ensuring that the endurance of the guardrail status monitoring terminal meets the maintenance cycle requirements, it improves the self-relief ability of urban roads when facing traffic accidents, avoids further congestion on the accident road leading to the obstruction of rescue and ambulance vehicles, and avoids the reduction of road traffic efficiency due to long-term congestion on the accident road, thereby achieving high-precision road guardrail status monitoring, accurate road accident detection, and reasonable selection of road traffic guidance information display location and display time period, solving the contradiction between the operation of the traffic guidance function and endurance guarantee.

[0046] Reference Figure 2 , Figure 2 Schematic diagram of the structure of a guardrail status monitoring system based on multi-mode communication according to an embodiment of the present invention.

[0047] like Figure 2 As shown, the guardrail status monitoring system based on multimode communication proposed in an embodiment of the present invention includes: Receiving module 10, for the guardrail status monitoring gateway to receive the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; A judgment module 20 is used to judge the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information, and generate road accident information; A generation module 30 is configured to extract the road accident location and road accident type from the road accident information, generate a road accident grade, and transmit the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud. The guardrail status monitoring cloud generates road traffic warning information based on a topological map of historical traffic flow in the target area and the maintenance time of the current guardrail maintenance cycle. The display module 40 is used for the guardrail status monitoring cloud to send the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

[0048] Other embodiments or specific implementations of the guardrail status monitoring system based on multi-mode communication of the present invention can refer to the above-mentioned method embodiments and will not be repeated here.

[0049] It should be understood that, in the description of this specification, reference to terms such as "one embodiment," "another embodiment," "other embodiments," or "first to Nth embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0050] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system 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 system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A guardrail status monitoring method based on multi-mode communication, characterized in that: The following steps are involved: The guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; According to the guardrail node identification and the guardrail posture parameters in the guardrail status information, the guardrail status of each guardrail node in the target area is determined to generate road accident information; Extract the accident location and type from the accident information to generate an accident grade. This grade and the battery life value of each guardrail node in the guardrail status information are sent to the guardrail status monitoring cloud. This cloud generates road traffic warning information based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle. The guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

2. The guardrail status monitoring method based on multi-mode communication according to claim 1, characterized in that: Before the guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, the method further includes: Based on the environmental information of the area where each guardrail node is located in the target area, a guardrail status monitoring terminal with a communication module that meets the communication characteristics is configured for each guardrail node; wherein the communication module includes a Zigbee communication module, a LoRa communication module, and a 433MHz radio frequency module; According to the configuration position of each guardrail status monitoring terminal, several guardrail status monitoring gateways using multi-mode communication are set up in the target area; wherein, the guardrail status monitoring gateway is configured to have a Zigbee receiving module, a LoRa receiving module and a 433MHz receiving module, and is equipped with a UART interface for data transmission between the Zigbee receiving module and the 433MHz receiving module and an SPI interface for data transmission between the 433MHz receiving module and the LoRa receiving module.

3. The guardrail status monitoring method based on multi-mode communication according to claim 2, characterized in that: Each guardrail status monitoring terminal is equipped with a guardrail status sensor and a solar-powered energy storage module; The guardrail status sensor is configured as a six-axis sensor with tilt change monitoring function and acceleration monitoring function, and the solar power supply energy storage module is configured to include an energy storage battery, a solar panel and a solar charging energy storage management circuit; Among them, the guardrail status information includes the guardrail inclination change parameters, guardrail acceleration parameters collected by the guardrail status sensor, and power endurance parameters output by the solar charging energy storage management circuit.

4. The guardrail status monitoring method based on multi-mode communication according to claim 3, characterized in that: The guardrail status monitoring gateway receives the guardrail node status sent by each guardrail status monitoring terminal in the target area, specifically including: Each guardrail status monitoring terminal extracts guardrail status information from the guardrail status information stream collected by the guardrail status sensor, and sends the guardrail status information and the endurance power value output in real time by the solar charging energy storage management circuit to the guardrail status monitoring gateway; The guardrail status monitoring gateway determines the guardrail node identifier and guardrail status information sent by the guardrail status monitoring terminal based on the binding relationship between the communication module and the corresponding guardrail status monitoring terminal for the guardrail status information and battery life value from different communication modules.

5. The guardrail status monitoring method based on multi-mode communication according to claim 1, characterized in that: The steps of determining the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information and generating road accident information specifically include: Using the guardrail inclination change parameters and guardrail acceleration parameters received from each guardrail node, abnormal state nodes are extracted from several guardrail nodes in the target area; Based on the guardrail inclination change parameters, guardrail acceleration parameters and guardrail node identification of each abnormal state node, which are pre-stored in the guardrail state monitoring gateway, a road accident guardrail feature set is constructed, and the road accident guardrail feature set is input into the road accident prediction model to identify the road accident location and road accident type in the target area; Generate road accident information based on the road accident location and road accident type in the target area.

6. The guardrail status monitoring method based on multi-mode communication according to claim 1, characterized in that: The steps of extracting the road accident location and road accident type from the road accident information, generating a road accident grade, and sending the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud include: Extracting the road accident location and road accident type from the road accident information, and generating a road accident grade based on a preset mapping table of road accident elements and road traffic efficiency reduction ratios; The road traffic efficiency reduction ratio and the battery life value of each guardrail node in the guardrail status information are used as road traffic alarm signals for road accidents and sent to the guardrail status monitoring cloud.

7. The guardrail status monitoring method based on multi-mode communication according to claim 6, characterized in that: The guardrail status monitoring cloud generates road traffic warning information based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle. The steps include: The guardrail status monitoring cloud obtains a historical traffic flow inflow topology map of the target area; wherein the historical traffic flow inflow topology map records the traffic flow inflow ratio of a number of inflow roads of each road at different times; The guardrail status monitoring cloud calculates the battery life value of each guardrail node according to the received road traffic alarm signal, the power consumption value of the guardrail status monitoring terminal of each guardrail node in the first unit time when the road traffic guidance display is executed and the power consumption value of the second unit time when the road traffic guidance display is not executed, and the maintenance time of the current guardrail maintenance cycle; The guardrail status monitoring cloud estimates the road accident handling period based on the road accident level in the received road traffic alarm signal. Taking into account the current traffic flow ratio of several incoming roads and the reduction in road traffic efficiency of the road where the road accident is located, the cloud plans the associated roads and the execution period for the road traffic guidance display among the several associated roads of the road where the road accident is located. The first constraint condition is that the sum of the traffic flow inflow ratios of the associated roads at the current moment of the several guardrail nodes planned to perform road traffic guidance display at each moment during the road accident handling period is not less than the road traffic efficiency reduction ratio of the road where the road accident location is located. The second constraint condition is that the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle. The variance of the remaining battery life value of the guardrail status monitoring terminal of each guardrail node planned to perform road traffic guidance display after the road accident handling period is used as the optimization objective function. The associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are used as a decision variable combination. A genetic algorithm is used to encode the decision variable combination into a chromosome. Through iterative screening of multiple generations of chromosomes, the chromosome that meets the first constraint condition and the second constraint condition and has the highest fitness determined based on the inverse of the optimization objective function is selected for decoding, and the associated roads for performing road traffic guidance display and the execution period of the road traffic guidance display are obtained to generate the optimal road traffic warning strategy. Based on the associated roads for executing the road guidance display and the execution period of the road guidance display in the road warning strategy, road warning information including road guidance display information is generated and sent to several guardrail status monitoring terminals on the associated roads.

8. The guardrail status monitoring method based on multi-mode communication according to claim 7, characterized in that: The remaining battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display after the road accident handling period meets the battery life usage of the current guardrail maintenance cycle. Specifically: the battery life power value of the guardrail status monitoring terminal of each guardrail node planned to execute road traffic guidance display minus the duration of the corresponding execution period during the road accident handling period and the power consumption value per unit time, which is greater than the normal power consumption value of the guardrail status monitoring determined by the duration of the period from the road accident handling period to the maintenance time of the current guardrail maintenance cycle and the power consumption value per unit time.

9. The guardrail status monitoring method based on multi-mode communication according to claim 1, characterized in that: The guardrail status monitoring cloud sends the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display steps, specifically including: The guardrail status monitoring cloud sends the associated roads for executing the road traffic guidance display and the execution period of the road traffic guidance display in the road traffic warning information to the guardrail status monitoring terminal of the corresponding associated guardrail node via the guardrail status monitoring gateway; The guardrail status monitoring terminal is driven to control the road traffic warning information display device configured at the guardrail node to display relevant road traffic guidance information for detouring the road where the road accident location is located.

10. A guardrail status monitoring system based on multi-mode communication, characterized in that: include: A receiving module is used for the guardrail status monitoring gateway to receive the guardrail node status sent by each guardrail status monitoring terminal in the target area; wherein the guardrail node status includes the guardrail node identifier and guardrail status information; A judgment module is used to judge the guardrail status of each guardrail node in the target area based on the guardrail node identifier and the guardrail posture parameters in the guardrail status information, and generate road accident information; A generation module is used to extract the road accident location and road accident type from the road accident information, generate a road accident grade, and send the road accident grade and the battery life value of each guardrail node in the guardrail status information to the guardrail status monitoring cloud. The guardrail status monitoring cloud generates road traffic warning information based on the historical traffic flow topology of the target area and the maintenance time of the current guardrail maintenance cycle; The display module is used for the guardrail status monitoring cloud to send the road traffic warning information to the associated guardrail node via the guardrail status monitoring gateway, driving the associated guardrail node to execute the road traffic guidance display.

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