A real-time safety monitoring system for expressways

Abstract

The present invention discloses a real-time safety monitoring system for expressways. The real-time safety monitoring system for expressways comprises the following steps: real-time monitoring of expressways and obtaining meteorological parameters of expressways; obtaining an evaluation index of expressway traffic conditions according to the meteorological parameters of expressways, matching to obtain the expressway traffic grade, and obtaining expressway traffic conditions according to the expressway traffic grade; obtaining expressway traffic condition parameters through real-time monitoring when the expressway is allowed to pass; obtaining an evaluation index of the safety level of expressways according to the expressway traffic condition parameters; analyzing expressway conditions according to the evaluation index of the safety level of expressways; and storing expressway safety limit values ​​and the permitted traffic grade of expressways. The present invention achieves the effect of quickly and efficiently clarifying the safety conditions of expressways by analyzing the expressway conditions according to the evaluation index of the safety level of expressways, and solves the problem that it is difficult to timely clarify the safety conditions of expressways in the prior art.

Description

Technical Field

[0001] The invention relates to the field of monitoring technology, and in particular to a real-time safety monitoring system for expressways. Background Art

[0002] With the continuous increase in highway traffic, the requirements for highway safety monitoring systems are also getting higher and higher. The real-time highway monitoring system is to ensure the smoothness and safety of highway traffic, reduce the occurrence of traffic accidents, and protect the lives and property of the people. Due to the large number of vehicles on the highway and the high speed, traffic accidents are prone to occur. Due to technical limitations, traditional monitoring methods often cannot meet the real-time, efficient, and intelligent monitoring needs. With the development of science and technology, it is necessary to develop and apply a real-time highway safety monitoring system.

[0003] The existing highway monitoring system collects data such as vehicle speed, road conditions, traffic flow, etc. on the highway through high-definition cameras, sensors, radars, laser rangefinders, etc., and processes and analyzes the collected data through servers installed with professional software to achieve real-time monitoring of the operating status of the highway.

[0004] For example, the invention patent announcement with announcement number: CN113297294B discloses a highway monitoring and management method and a cloud monitoring and management platform based on big data and cloud computing, including: obtaining the appearance time and disappearance time of each vehicle on each sub-road section in a unit time period in the monitored highway, counting the traffic volume of each sub-road section in the unit time period, and limiting the flow of each sub-road section that is greater than or equal to the set traffic volume threshold and all ramps in the corresponding front and rear sub-road sections, while obtaining each illegal driving parameter of each vehicle on each sub-road section in the unit time period, comparing and obtaining the number of vehicles with illegal driving parameters on each sub-road section in the unit time period, calculating the vehicle driving safety impact coefficient of each sub-road section in the unit time period, counting the position number of each sub-road section where there are safety hazards in vehicle driving in the unit time period, and notifying traffic control personnel to go to the starting position of the next sub-road section corresponding to each sub-road section to take traffic safety management measures.

[0005] For example, the patent application with publication number: CN114706908A discloses a method and system for monitoring hazardous chemical vehicles based on highway big data, including: obtaining highway big data through ETC gantries, toll collection systems and monitoring systems installed on the highway, and obtaining the highway driving trajectory of hazardous chemical vehicles based on the highway big data; obtaining the GPS data of the hazardous chemical vehicle, and performing GPS status judgment based on the GPS data; marking the vehicle based on the GPS status judgment result and the highway driving trajectory of the hazardous chemical vehicle, and reporting information of the marked vehicle.

[0006] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0007] In the prior art, since the safety of highways is not only affected by external factors such as weather, but also by multiple factors such as vehicle driving conditions, it is difficult to determine the safety status of highways in a timely manner. Summary of the invention

[0008] The embodiment of the present application solves the problem in the prior art that it is difficult to promptly clarify the safety status of the highway by providing a real-time highway safety monitoring system, thereby achieving rapid and efficient clarification of the safety status of the highway.

[0009] The embodiment of the present application provides a real-time safety monitoring system for expressways, comprising: a meteorological parameter acquisition module, a traffic analysis module, a traffic parameter acquisition module, an index acquisition module, a safety analysis module and a highway database module; wherein the meteorological parameter acquisition module is used to monitor the expressway in real time and acquire the meteorological parameters of the expressway; the traffic analysis module is used to obtain the expressway traffic condition evaluation index according to the meteorological parameters of the expressway, and obtain the expressway traffic grade by matching, and obtain the expressway traffic condition according to the expressway traffic grade; the traffic parameter acquisition module is used to obtain the expressway traffic condition parameters through real-time monitoring when the expressway is allowed to pass; the index acquisition module is used to obtain the expressway safety level evaluation index according to the expressway traffic condition parameters; the safety analysis module is used to analyze the expressway condition according to the expressway safety level evaluation index; the expressway database module is used to store the expressway safety level limit value and the expressway allowed traffic grade.

[0010] Furthermore, the specific analysis process of analyzing the highway situation based on the highway safety level assessment index is: obtaining the highway safety level assessment index, comparing the highway safety level assessment index with the highway safety level limit value stored in the highway database, when the highway safety level assessment index is less than the highway safety level limit value, it indicates that the highway section is in a safe passing condition; when it is in other conditions, it indicates that the highway section is in a dangerous passing condition, and an early warning reminder is issued.

[0011] Furthermore, the specific method for obtaining the highway safety evaluation index is as follows: obtaining the number of highways and numbering the highways; dividing the highways into multiple sections and numbering the sections; setting monitoring time points and numbering the monitoring time points; constructing a calculation formula for the highway safety evaluation index; the specific calculation formula for the highway safety evaluation index is:

[0012]

[0013] In the formula, It is represented as the highway safety evaluation index of the d0th section of the g0th highway at the j0th monitoring time point, g0=1,2,...,g, g represents the total number of highways, d0=1,2,...,d, d represents the total number of highway sections, j0=1,2,...,j, j represents the monitoring time point, It is expressed as the vehicle driving safety index of the d0th section of the g0th highway at the j0th monitoring time point, It is represented as the accident occurrence index of the d0th section of the g0th highway at the j0th monitoring time point, w1 is represented as the weight ratio of the vehicle driving safety index in the highway safety evaluation index, w2 is represented as the weight ratio of the accident occurrence index in the highway safety evaluation index, and e is represented as a natural constant.

[0014] Furthermore, the specific analysis process of the vehicle driving safety index is as follows: according to the highway traffic condition parameters, the vehicle driving speed of each section of each highway at each monitoring time point is extracted, and the vehicle driving speeds are arranged in order from large to small, thereby extracting the first and last ranked vehicle driving speeds, and using them as the fastest vehicle driving speed and the slowest vehicle driving speed; averaging the vehicle driving speeds to obtain the average vehicle driving speed; analyzing and evaluating the fastest vehicle driving speed, the slowest vehicle driving speed and the average vehicle driving speed to obtain the vehicle driving safety index.

[0015] Furthermore, the specific analysis process of the accident occurrence index is as follows: according to the highway traffic condition parameters, the total number of stalled vehicles in each lane of each section of each highway at each monitoring time point, the total number of vehicles traveling behind the stalled vehicles, the total number of vehicles involved in traffic accidents, the total number of vehicles in the section lanes, the number of lanes occupied by rescue operations, the average safety distance of vehicles, the standard safety distance of vehicles are obtained, and the accident occurrence index is obtained by analyzing and processing.

[0016] Furthermore, the vehicle driving safety index specifically represents evaluation data obtained by processing the vehicle driving speed of each section of each highway at each monitoring time point with the corresponding prescribed standard speed, which is used to reflect the degree of vehicle driving standardization of each section of each highway at each monitoring time point, and provide an evaluation index for vehicle driving speed safety; the accident occurrence index specifically analyzes the impact of highway accidents by analyzing the impact caused by vehicles in different driving conditions in each lane of each section of each highway at each monitoring time point, which is used to reflect the degree of accident occurrence of each section of each highway at each monitoring time point, and provide a judgment standard for the degree of accident occurrence; the highway safety evaluation index is used to evaluate the safety of highways when passing.

[0017] Furthermore, the specific method for obtaining the highway traffic condition evaluation index is: constructing a calculation formula for the highway traffic condition evaluation index; the specific calculation formula for the highway traffic condition evaluation index is:

[0018]

[0019] In the formula, It is expressed as the highway traffic condition evaluation index of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the visibility evaluation index of the d0th section of the g0th highway at the s0th observation point, It is expressed as the highway meteorological condition assessment index of the d0th section of the g0th highway at the s0th time observation point, m1 is expressed as the weight factor of the set visibility condition assessment index, m2 is expressed as the weight factor of the set highway meteorological condition assessment index, and e is expressed as a natural constant.

[0020] Furthermore, the specific acquisition process of the highway traffic condition assessment index is as follows: obtaining highway meteorological parameters, extracting the visibility of each highway section at each observation point at each time, and comparing and analyzing the visibility with the visibility when the highway is allowed to pass to obtain the visibility condition assessment index; extracting the meteorological indicators of each highway section at each observation point at each time, analyzing and processing the meteorological indicators with the meteorological indicators when the highway is restricted to pass to obtain the highway meteorological condition assessment index; and jointly analyzing the visibility condition assessment index and the highway meteorological condition assessment index to obtain the highway traffic condition assessment index.

[0021] Furthermore, the visibility condition evaluation index specifically refers to a quantitative index obtained by analyzing the visibility of each section of each highway at each observation point at each time with the visibility when the highway is allowed to pass, which is used to describe the visibility condition of the highway and provide an evaluation standard for analyzing the highway traffic condition based on the visibility condition; the highway meteorological condition evaluation index specifically refers to an evaluation standard obtained by analyzing the meteorological indicators of each section of each highway at each observation point at each time with the meteorological indicators when the highway is restricted to pass, which is used to evaluate the degree to which the highway is affected by the weather and is a judgment indicator for the traffic condition of the highway; the highway traffic condition evaluation index is used to evaluate the degree to which the highway is allowed to pass.

[0022] Furthermore, the specific analysis process for obtaining the highway traffic condition based on the highway traffic grade is: obtaining the highway traffic condition evaluation index, matching the highway traffic condition evaluation index with the highway allowed traffic grade corresponding to the highway traffic condition evaluation index interval stored in the highway database, and obtaining the highway traffic grade; when the highway traffic grade is prohibited, it means that the highway is prohibited; when the highway traffic grade is allowed, it means that the highway is allowed.

[0023] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0024] 1. By real-time monitoring of the expressway and obtaining the meteorological parameters of the expressway, the expressway traffic condition evaluation index is obtained according to the meteorological parameters of the expressway, and the expressway traffic grade is matched, and the expressway traffic condition is obtained according to the expressway traffic grade. When the expressway is allowed to pass, the expressway traffic condition parameters are obtained through real-time monitoring, and the expressway safety evaluation index is obtained according to the expressway traffic condition parameters. The expressway condition is analyzed according to the expressway safety evaluation index, thereby realizing the rapid and efficient clarification of the expressway safety condition, and effectively solving the problem that it is difficult to timely clarify the expressway safety condition in the existing technology.

[0025] 2. By obtaining the highway traffic condition evaluation index based on the highway meteorological parameters, and matching it to obtain the highway traffic grade, the highway traffic condition is obtained according to the highway traffic grade, so that the driver can promptly understand the traffic condition of the road ahead, thereby preventing the driver from mistakenly entering the prohibited section.

[0026] 3. By analyzing the highway conditions according to the highway safety assessment index, the safety level of vehicles passing through the highway section can be clarified according to the highway conditions, and then the staff can be arranged to carry out traffic control arrangements according to the safety level of the highway section, reducing the chances of vehicles entering dangerous highway sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a real-time highway safety monitoring system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiment of the present application solves the problem in the prior art that it is difficult to promptly clarify the safety situation of the highway by providing a real-time highway safety monitoring system. The system monitors the highway in real time and obtains highway meteorological parameters, obtains a highway traffic condition assessment index based on the highway meteorological parameters, and obtains the highway traffic grade based on the highway traffic grade. The highway traffic condition is obtained through real-time monitoring when the highway is allowed to pass, and obtains a highway safety level assessment index based on the highway traffic condition parameters. The highway condition is analyzed based on the highway safety level assessment index, thereby achieving rapid and efficient clarification of the highway safety situation.

[0029] The technical solution in the embodiment of the present application is to solve the above-mentioned problem of difficulty in timely clarifying the safety situation of the highway. The overall idea is as follows:

[0030] The meteorological parameter acquisition module is used to monitor the expressway in real time and acquire the meteorological parameters of the expressway; the visibility condition evaluation index and the expressway meteorological condition evaluation index are obtained according to the meteorological parameters of the expressway through the traffic analysis module, and the expressway traffic condition evaluation index is obtained through analysis, and the expressway traffic grade is obtained through matching, and the expressway traffic condition is obtained according to the expressway traffic grade; the expressway traffic condition parameters are obtained through real-time monitoring when the expressway is allowed to pass through the traffic parameter acquisition module; the vehicle driving safety index and the accident occurrence index are obtained according to the expressway traffic condition parameters through the index acquisition module, and the expressway safety degree evaluation index is obtained through analysis; the expressway condition is analyzed according to the expressway safety degree evaluation index through the safety analysis module; the expressway safety degree limit value and the expressway allowed traffic grade are stored through the expressway database module, so as to achieve the effect of quickly and efficiently clarifying the safety condition of the expressway.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1As shown, it is a schematic diagram of the structure of the real-time safety monitoring system of the expressway provided in the embodiment of the present application, including: a meteorological parameter acquisition module, a traffic analysis module, a traffic parameter acquisition module, an index acquisition module, a safety analysis module and a highway database module; wherein the meteorological parameter acquisition module is used to monitor the expressway in real time and obtain the meteorological parameters of the expressway; the traffic analysis module is used to obtain the highway traffic condition evaluation index according to the highway meteorological parameters, and match the highway traffic grade, and obtain the highway traffic condition according to the highway traffic grade; the traffic parameter acquisition module is used to obtain the highway traffic condition parameters through real-time monitoring when the highway is allowed to pass; the index acquisition module is used to obtain the highway safety level evaluation index according to the highway traffic condition parameters; the safety analysis module is used to analyze the highway condition according to the highway safety level evaluation index; the highway database module is used to store the highway safety level limit value and the highway allowed traffic grade.

[0033] In this embodiment, the main purpose of the highway real-time safety monitoring system is to ensure the smoothness and safety of highway traffic. By real-time monitoring and analyzing information such as road conditions and vehicle driving status, potential traffic hazards can be discovered and handled in a timely manner to reduce the occurrence of traffic accidents. The highway real-time safety monitoring system can be linked with other systems such as the traffic police command system and the emergency rescue system to form a collaborative effect.

[0034] Furthermore, the specific analysis process of analyzing the highway situation according to the highway safety assessment index is: obtaining the highway safety assessment index, comparing the highway safety assessment index with the highway safety limit value stored in the highway database, when the highway safety assessment index is less than the highway safety limit value, it means that the highway section is in a safe passing condition; when it is in other conditions, it means that the highway section is in a dangerous passing condition, and an early warning reminder is issued.

[0035] In this embodiment, the high-speed safety level limit is When the highway safety evaluation index is less than the highway safety limit value, When the highway section is in a safe condition, it means that the highway section is in a safe condition. When the warning is on, it indicates that the highway section is in a dangerous traffic situation and an early warning is issued. After the relevant departments receive the warning, they arrange staff to make relevant rescue arrangements for the highway section.

[0036] Furthermore, the highway safety evaluation index can be obtained through the following methods, including: using correlation analysis to explore the relationship between the average speed of vehicles and the incidence of traffic accidents, using regression analysis to establish a mathematical model between speed and accident severity, calculating the accident incidence based on traffic accident records, and using a weighted total score to evaluate the safety of highways. The highway safety evaluation index can also be obtained through calculation. The specific method for obtaining the highway safety evaluation index is: obtain the number of highways and number the highways; divide the highways into multiple sections and number the sections; set monitoring time points and number the monitoring time points; construct a calculation formula for the highway safety evaluation index; the specific calculation formula for the highway safety evaluation index is:

[0037]

[0038] In the formula, It is represented as the highway safety evaluation index of the d0th section of the g0th highway at the j0th monitoring time point, g0=1,2,...,g, g represents the total number of highways, d0=1,2,...,d, d represents the total number of highway sections, j0=1,2,...,j, j represents the monitoring time point, It is expressed as the vehicle driving safety index of the d0th section of the g0th highway at the j0th monitoring time point, It is represented as the accident occurrence index of the d0th section of the g0th highway at the j0th monitoring time point, w1 is represented as the weight ratio of the vehicle driving safety index in the highway safety evaluation index, w2 is represented as the weight ratio of the accident occurrence index in the highway safety evaluation index, and e is represented as a natural constant.

[0039] In this embodiment, by monitoring the sections of the expressway separately and obtaining the expressway safety assessment index, the actual safety status of each section can be analyzed through the expressway safety assessment index, and rescue or traffic control activities can be carried out quickly and efficiently based on the actual safety status of each expressway section, which is conducive to faster and more efficient vehicle passage on the entire expressway.

[0040] The larger the highway safety assessment index is, the more dangerous the highway section is; the smaller the highway safety assessment index is, the safer the highway section is.

[0041] Furthermore, the specific analysis process of the vehicle driving safety index is as follows: according to the highway traffic condition parameters, the vehicle driving speed of each section of each highway at each monitoring time point is extracted, and the vehicle driving speeds are arranged in order from large to small, thereby extracting the first and last ranked vehicle driving speeds, and using them as the fastest vehicle driving speed and the slowest vehicle driving speed; averaging the vehicle driving speeds to obtain the average vehicle driving speed; analyzing and evaluating the fastest vehicle speed, the slowest vehicle speed and the average vehicle speed to obtain the vehicle driving safety index.

[0042] In this embodiment, the vehicle driving safety index can be obtained by the following methods, including: using descriptive statistics to analyze the average speed, maximum speed and minimum speed of vehicles on the highway, calculating the standard deviation of the speed to understand the discrete degree of speed distribution, and exploring the relationship between the average speed of the vehicle and traffic safety. The vehicle driving safety index can also be obtained by calculation. The specific method for obtaining the vehicle driving safety index is: obtaining the number of lanes on the highway section and numbering the lanes; constructing a calculation formula for the vehicle driving safety index; the specific calculation formula for the vehicle driving safety index is:

[0043]

[0044] In the formula, It is expressed as the vehicle driving safety index of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the slowest vehicle speed of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, c0=1,2,...,c, c represents the total number of lanes, It is represented by the slowest speed allowed for the lane of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is expressed as the slowest speed allowable error of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the fastest speed of vehicles in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the maximum speed allowed by the lane of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is expressed as the maximum speed allowable error of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented as the average speed of vehicles on the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the standard driving speed of the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, q1 is represented by the weight ratio of the slowest vehicle speed in the vehicle driving safety index, q2 is represented by the weight ratio of the fastest vehicle speed in the vehicle driving safety index, and q3 is represented by the weight ratio of the average vehicle speed in the vehicle driving safety index.

[0045] Furthermore, the specific analysis process of the accident occurrence index is as follows: according to the highway traffic condition parameters, the total number of stationary vehicles in each lane of each section of each highway at each monitoring time point, the total number of vehicles traveling behind the stationary vehicles, the total number of vehicles involved in traffic accidents, the total number of vehicles in the section lanes, the number of lanes occupied by rescue operations, the average safety distance of vehicles, the standard safety distance of vehicles are obtained, and the accident occurrence index is obtained by analyzing and processing.

[0046] In this embodiment, the accident occurrence index can be obtained in a variety of ways, including: using Poisson distribution to estimate the probability of vehicle stagnation on the highway, using exponential decay function to describe the relationship between the following distance between vehicles and driving safety, calculating the safety distance based on the driver's reaction time and the vehicle braking distance, and using multiple linear regression, logistic regression or other statistical methods to establish a comprehensive evaluation model to predict the probability of accident occurrence. The accident occurrence index can also be obtained by the following method. The specific accident occurrence index calculation formula is:

[0047]

[0048] In the formula, It is represented as the accident occurrence index of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the total number of vehicles that are stuck in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the total number of vehicles running behind the stationary vehicle in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the total number of vehicles involved in traffic accidents on the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the total number of vehicles in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the number of lanes occupied by rescue operations in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented as the average safety distance of vehicles in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the standard safety distance of vehicles in the c0th lane of the d0th section of the g0th highway at the j0th monitoring time point, k1 is represented by the weight ratio of the total number of stationary vehicles in the accident occurrence index, k2 is represented by the weight ratio of the total number of vehicles involved in traffic accidents in the accident occurrence index, k3 is represented by the weight ratio of the number of lanes occupied by rescue operations in the accident occurrence index, and k4 is represented by the weight ratio of the average safety distance of vehicles in the accident occurrence index.

[0049] Furthermore, the vehicle driving safety index specifically represents the evaluation data obtained by processing the vehicle driving speed of each section of each highway at each monitoring time point with the corresponding prescribed standard speed, which is used to reflect the degree of vehicle driving standardization of each section of each highway at each monitoring time point, and provide an evaluation index for vehicle driving speed safety; the accident occurrence index specifically analyzes the impact of highway accidents by analyzing the impact caused by vehicles in different driving conditions in each lane of each section of each highway at each monitoring time point, which is used to reflect the degree of accident occurrence of each section of each highway at each monitoring time point, and provide a judgment standard for the degree of accident occurrence; the highway safety evaluation index is used to evaluate the safety of highways when passing.

[0050] In this embodiment, due to the differences in the design of highways, the design speeds of different highways are also different. When a driver drives from a highway with a speed limit to another highway with a different speed limit, he may forget to change the driving speed. The speed limits of the two highways are different, and the driving speeds required of the driver are also different. In this case, accidents are prone to occur, posing a threat to the lives of people traveling on the highway. In addition, vehicles in the same lane of the same section should drive at the speed specified by the lane. When other vehicles driving at other speeds appear, accidents are prone to occur. By analyzing the vehicle driving safety index, the vehicle driving safety can be clarified. The larger the vehicle driving safety index, the more dangerous it is for the vehicle to drive on the highway section; the smaller the vehicle driving safety index, the safer it is for the vehicle to drive on the highway section.

[0051] On the highway, when a vehicle suddenly stops ahead, the vehicles behind the stopped vehicle are prone to fail to brake in time, leading to accidents. When the driver is driving in the direction of the highway and lanes suddenly merge or shrink ahead, the probability of an accident increases. When driving on the highway, vehicles are generally traveling at a high speed. If the appropriate safety distance is not maintained between vehicles, a traffic accident is very likely to occur once emergency braking occurs. The probability of an accident is measured by the accident occurrence index. The larger the accident occurrence index, the greater the probability of an accident; the smaller the accident occurrence index, the smaller the probability of an accident.

[0052] Furthermore, the highway traffic condition evaluation index can be obtained in a variety of ways, for example, by establishing an evaluation model to evaluate the comprehensive impact of factors such as visibility, road surface humidity, road icing, temperature and precipitation on road traffic, and clarify the traffic conditions. The highway traffic condition evaluation index can also be calculated by the following method. The specific method for obtaining the highway traffic condition evaluation index is: constructing a calculation formula for the highway traffic condition evaluation index; the specific calculation formula for the highway traffic condition evaluation index is:

[0053]

[0054] In the formula, It is expressed as the highway traffic condition evaluation index of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the visibility evaluation index of the d0th section of the g0th highway at the s0th observation point, It is expressed as the highway meteorological condition assessment index of the d0th section of the g0th highway at the s0th time observation point, m1 is expressed as the weight factor of the set visibility condition assessment index, m2 is expressed as the weight factor of the set highway meteorological condition assessment index, and e is expressed as a natural constant.

[0055] In this embodiment, whether the expressway is passable is affected by many factors. For example, vehicles are usually prohibited from passing in weather conditions such as heavy rain, strong winds, and heavy snow. Vehicles are also prohibited from passing when visibility on the expressway is extremely low. The smaller the expressway passability evaluation index, the higher the safety of the expressway and the higher the passability; the larger the expressway passability evaluation index, the lower the safety of the expressway and the lower the passability.

[0056] Furthermore, the specific process of obtaining the highway traffic condition assessment index is as follows: obtaining the meteorological parameters of the highway, extracting the visibility of each section of each highway at each observation point at each time, and comparing and analyzing the visibility with the visibility when the highway is allowed to pass to obtain the visibility condition assessment index; extracting the meteorological indicators of each section of each highway at each observation point at each time, and analyzing and processing the meteorological indicators with the meteorological indicators when the highway is restricted to pass to obtain the highway meteorological condition assessment index; jointly analyzing the visibility condition assessment index and the highway meteorological condition assessment index to obtain the highway traffic condition assessment index.

[0057] In this embodiment, the visibility situation evaluation index can be obtained by the following method, including: collecting historical visibility data, using statistical methods such as time series analysis and regression analysis to predict visibility in a certain time period in the future, and combining statistical models, machine learning models and possible physical models to improve the accuracy of the prediction. The visibility situation evaluation index can also be obtained by calculation. The specific calculation formula of the visibility situation evaluation index is:

[0058]

[0059] In the formula, It is expressed as the visibility evaluation index of the d0th section of the g0th highway at the s0th observation point, It is expressed as the horizontal visibility of the highway section of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the horizontal visibility allowed for high-speed traffic on the d0th section of the g0th highway, It is expressed as the meteorological visibility of the highway section of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the meteorological visibility allowed for highway traffic on the d0th section of the g0th highway, b1 is expressed as the weight ratio of the set horizontal visibility of the highway section in the visibility condition assessment index, b2 is expressed as the weight ratio of the set meteorological visibility of the highway section in the visibility condition assessment index, and e is expressed as a natural constant.

[0060] The highway meteorological condition assessment index can be obtained by the following methods: collecting historical meteorological data through meteorological stations, satellite remote sensing, radar monitoring and other methods, including the intensity, duration, and frequency of weather phenomena such as wind, rain, thunder, lightning, and snow, and using mathematical methods (such as frequency analysis and extreme value theory) to establish a probability distribution model to predict possible extreme weather events; the highway meteorological condition assessment index can also be obtained by calculation. The specific calculation formula for the highway meteorological condition assessment index is:

[0061]

[0062] In the formula, It is expressed as the highway meteorological condition evaluation index of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the highway section rainfall level of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the highway restricted rainfall level of the d0th section of the g0th highway, It is expressed as the fog density level of the highway section of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the fog density level of the highway restricted traffic on the d0th section of the g0th highway. It is expressed as the wind force level of the d0th section of the g0th highway at the s0th time observation point, It is represented by the wind force level of the highway restriction on the d0th section of the g0th highway. It is expressed as the lightning level of the highway section of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the lightning level of the high-speed restricted traffic on the d0th section of the g0th highway, It is expressed as the snowfall level of the highway section of the d0th section of the g0th highway at the s0th time observation point, It represents the snowfall level for highway restricted traffic on the d0th section of the g0th highway, a1 represents the weight ratio of the rainfall level of the highway section in the highway meteorological condition assessment index, a2 represents the weight ratio of the fog concentration level of the highway section in the highway meteorological condition assessment index, a3 represents the weight ratio of the wind level of the highway section in the highway meteorological condition assessment index, a4 represents the weight ratio of the lightning level of the highway section in the highway meteorological condition assessment index, and a5 represents the weight ratio of the snowfall level of the highway section in the highway meteorological condition assessment index.

[0063] Furthermore, the visibility condition assessment index refers to a quantitative index obtained by analyzing the visibility of each section of each highway at each observation point at each time with the visibility when the highway is allowed to pass, which is used to describe the visibility condition of the highway and provide an assessment standard for analyzing the highway traffic condition based on the visibility condition; the highway meteorological condition assessment index refers to an assessment standard obtained by analyzing the meteorological indicators of each section of each highway at each observation point at each time with the meteorological indicators when the highway is restricted to pass, which is used to assess the degree to which the highway is affected by the weather and is a judgment indicator for the highway traffic condition; the highway traffic condition assessment index is used to assess the degree to which the highway is allowed to pass.

[0064] In this embodiment, the larger the visibility evaluation index is, the worse the visibility of the vehicle when driving on the highway is, and the more dangerous it is to drive; the smaller the visibility evaluation index is, the better the visibility of the vehicle when driving on the highway is, and the safer it is to drive. The smaller the highway weather evaluation index is, the better the weather is, and the safer the vehicle is to drive; the larger the highway weather evaluation index is, the worse the weather is, and the more dangerous it is to drive.

[0065] Furthermore, the specific analysis process of obtaining the highway traffic condition according to the highway traffic grade is: obtaining the highway traffic condition evaluation index, matching the highway traffic condition evaluation index with the highway allowed traffic grade corresponding to the highway traffic condition evaluation index interval stored in the highway database, and obtaining the highway traffic grade; when the highway traffic grade is prohibited, it means that the highway is prohibited; when the highway traffic grade is allowed, it means that the highway is allowed.

[0066] In this embodiment, the highway traffic condition evaluation index interval is divided into a first interval and a second interval. The highway traffic level corresponding to the first interval is prohibited, and the highway traffic level corresponding to the second interval is allowed. When the highway traffic level is prohibited, it means that the highway is relatively dangerous, the highway is prohibited, and there are no vehicles on the highway, and there is no need to analyze the highway situation; when the highway traffic level is allowed, it means that the highway is relatively safe, the highway is allowed, and there are vehicles traveling on the highway, and it is necessary to analyze the highway situation according to the highway safety evaluation index.

[0067] The technical scheme in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to a highway monitoring and management method and a cloud monitoring and management platform based on big data and cloud computing announced by the invention patent with publication number: CN113297294B, the embodiment of the present application obtains a highway traffic condition evaluation index according to the meteorological parameters of the highway, and matches it to obtain the highway traffic grade, and obtains the highway traffic condition according to the highway traffic grade, so that the driver can promptly understand the traffic condition of the road ahead, thereby preventing the driver from mistakenly entering the prohibited section; relative to a hazardous chemical vehicle monitoring method and system based on highway big data disclosed in the patent application with publication number: CN114706908A, the embodiment of the present application analyzes the highway condition according to the highway safety evaluation index, thereby clarifying the safety level of the vehicle passing through the highway section according to the highway condition, thereby arranging staff to carry out traffic command arrangements according to the safety level of the highway section, and reducing the chance of vehicles entering dangerous highway sections.

[0068] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] The present invention is described with reference to flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0072] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A real-time highway safety monitoring system, characterized in that: include: Meteorological parameter acquisition module, traffic analysis module, traffic parameter acquisition module, index acquisition module, safety analysis module and high-speed database module; The meteorological parameter acquisition module is used to monitor the expressway in real time and acquire the meteorological parameters of the expressway; The traffic analysis module is used to obtain a highway traffic condition evaluation index according to the highway meteorological parameters, match it to obtain the highway traffic grade, and obtain the highway traffic condition according to the highway traffic grade; The traffic parameter acquisition module is used to acquire the highway traffic condition parameters through real-time monitoring when the highway is allowed to pass; The index acquisition module is used to obtain a highway safety evaluation index based on highway traffic condition parameters; The safety analysis module is used to analyze the highway situation according to the highway safety evaluation index; The high-speed database module is used to store high-speed safety limit values ​​and high-speed permitted traffic levels; The specific method for obtaining the highway safety evaluation index is as follows: Get the number of highways and number them; Divide the highway into multiple sections and number the sections; Set monitoring time points and number them; Construct a calculation formula for the highway safety evaluation index; The specific calculation formula for the highway safety evaluation index is: In the formula, It is represented as the highway safety evaluation index of the d0th section of the g0th highway at the j0th monitoring time point, g0=1,2,...,g, g represents the total number of highways, d0=1,2,...,d, d represents the total number of highway sections, j0=1,2,...,j, j represents the monitoring time point, It is expressed as the vehicle driving safety index of the d0th section of the g0th highway at the j0th monitoring time point, It is represented by the accident occurrence index of the d0th section of the g0th highway at the j0th monitoring time point, w1 is represented by the weight ratio of the vehicle driving safety index in the highway safety evaluation index, w2 is represented by the weight ratio of the accident occurrence index in the highway safety evaluation index, and e is represented by a natural constant; The specific analysis process of the vehicle driving safety index is as follows: According to the highway traffic condition parameters, the vehicle speeds of each section of each highway at each monitoring time point are extracted, and the vehicle speeds are arranged in order from large to small, thereby extracting the first and last ranked vehicle speeds, which are used as the fastest vehicle speed and the slowest vehicle speed; The vehicle speed is processed by averaging to obtain the average vehicle speed; The fastest speed, the slowest speed and the average speed of the vehicle are analyzed and evaluated to obtain the vehicle driving safety index; The specific analysis process of the accident occurrence indicator is as follows: According to the parameters of highway traffic conditions, the total number of stalled vehicles, the total number of vehicles behind stalled vehicles, the total number of vehicles involved in traffic accidents, the total number of vehicles in the lanes of the road section, the number of lanes occupied by rescue operations, the average safety distance of vehicles, and the standard safety distance of vehicles in each lane of each section of each highway at each monitoring time point are obtained, and the accident occurrence index is obtained through analysis and processing; The specific method for obtaining the highway traffic condition evaluation index is as follows: Construct a calculation formula for the highway traffic condition evaluation index; The specific calculation formula for the highway traffic condition evaluation index is: In the formula, It is expressed as the highway traffic condition evaluation index of the d0th section of the g0th highway at the s0th time observation point, It is expressed as the visibility evaluation index of the d0th section of the g0th highway at the s0th observation point, It is expressed as the highway meteorological condition assessment index of the d0th section of the g0th highway at the s0th time observation point, m1 is expressed as the weight factor of the set visibility condition assessment index, m2 is expressed as the weight factor of the set highway meteorological condition assessment index, and e is expressed as a natural constant.

2. The real-time highway safety monitoring system as claimed in claim 1, characterized in that: The specific analysis process of analyzing the highway situation according to the highway safety evaluation index is as follows: Obtaining a highway safety evaluation index, comparing the highway safety evaluation index with a highway safety limit value stored in a highway database, and when the highway safety evaluation index is less than the highway safety limit value, it indicates that the highway section is in a safe traffic condition; In other situations, it means that the highway section is in a dangerous traffic situation and an early warning reminder is issued.

3. The real-time highway safety monitoring system as claimed in claim 2, characterized in that: The vehicle driving safety index specifically represents the evaluation data obtained by processing the vehicle driving speed of each section of each highway at each monitoring time point with the corresponding prescribed standard speed, which is used to reflect the degree of vehicle driving standardization of each section of each highway at each monitoring time point, and provide an evaluation index for vehicle driving speed safety; The accident occurrence index specifically analyzes the impact degree of highway accident events by analyzing the impact degree caused by vehicles in different driving conditions in each lane of each section of each highway at each monitoring time point, and is used to reflect the accident occurrence degree of each section of each highway at each monitoring time point, and provide a judgment standard for the accident occurrence degree; The highway safety evaluation index is used to evaluate the safety level of highway traffic.

4. The real-time highway safety monitoring system as claimed in claim 3, characterized in that: The specific process of obtaining the highway traffic condition evaluation index is as follows: Obtain the meteorological parameters of the expressway, extract the visibility of each section of each expressway at each observation point at each time, and compare and analyze the visibility with the visibility when the expressway is allowed to pass to obtain the visibility assessment index; Extract meteorological indicators of each section of each expressway at each observation point at each time, and analyze and process the meteorological indicators with the meteorological indicators under the condition of restricted traffic on the expressway to obtain the expressway meteorological condition evaluation index; The visibility condition assessment index and the highway meteorological condition assessment index are jointly analyzed to obtain the highway traffic condition assessment index.

5. The real-time highway safety monitoring system as claimed in claim 2, characterized in that: The visibility evaluation index refers to a quantitative index obtained by analyzing the visibility of each section of each expressway at each observation point at each time and the visibility when the expressway is allowed to pass, which is used to describe the visibility of the expressway and provide an evaluation standard for analyzing the expressway traffic conditions based on the visibility conditions. The highway meteorological condition evaluation index specifically refers to an evaluation standard obtained by analyzing the meteorological indicators of each highway section at each observation point at each time with the meteorological indicators under the condition of restricted traffic on the highway, which is used to evaluate the degree of influence of the highway on the weather and is an indicator for judging the traffic condition of the highway; The highway traffic condition evaluation index is used to evaluate the degree of traffic permission on the highway.

6. The real-time highway safety monitoring system as claimed in claim 1, characterized in that: The specific analysis process of obtaining the highway traffic situation according to the highway traffic grade is as follows: Obtaining a highway traffic condition assessment index, matching the highway traffic condition assessment index with a highway permitted traffic grade corresponding to a highway traffic condition assessment index interval stored in a highway database, and obtaining a highway traffic grade; When the highway access level is prohibited, it means that the highway is prohibited; When the highway access level is allowed, it means that the highway is allowed.

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