CN116631211A - Emergency vehicle road congestion evacuation system based on Internet of vehicles - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention belongs to the technical field of urban public safety, and particularly relates to an emergency vehicle road congestion evacuation system based on the Internet of vehicles; the method comprises the following steps: the system comprises a data acquisition module, a congestion detection module, a path planning module, a traffic police dispatch module and a facility dispatch module; the data acquisition module is used for acquiring road condition information, traffic police information and facility information; the congestion detection module is used for judging whether the road is in a congestion state according to the road condition information; the path planning module is used for constructing a road congestion optimal route according to road condition information and traffic police information when the road is in a congestion state; solving the problem of the optimal route of road congestion to obtain a traffic police dispatching scheme; the traffic police dispatch module is used for carrying out traffic police dispatch according to a traffic police dispatch scheme; the facility scheduling module is used for carrying out facility scheduling according to the road condition information and the facility information, so that the efficiency of emergency tasks of emergency vehicles can be improved, and the probability of tragedy caused by untimely tasks due to congestion is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of urban public safety, and particularly relates to an emergency vehicle road congestion evacuation system based on the Internet of vehicles.
Background
In recent years, with the rapid development of urban economy, more and more vehicles run on roads, and the occurrence of road congestion often occurs, if accidents occur on the congested road sections, emergency vehicle rescue is not timely caused, and further, larger casualties and economic losses are caused at the accident sites. Therefore, how to plan and schedule an optimal emergency plan according to the road section state and road information of the target place, and to treat emergency with minimum time, and to reduce casualties and economic losses has become the focus of research in the current related fields. Therefore, due to the task specificity and time urgency of the emergency vehicle, the existing emergency vehicle takes measures for completing road congestion evacuation by using traffic police, namely, adding means for traffic police dispatch under the existing internet of vehicles by means of big data, AI algorithm and the like, thereby completing the emergency vehicle congestion evacuation system. However, there is no system evacuation strategy and structured dispatching system with strong pertinence to emergency vehicles, so there is a need for an emergency vehicle congestion evacuation system for the special scene of emergency evacuation.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an emergency vehicle road congestion evacuation system based on the Internet of vehicles, which comprises the following steps: the system comprises a data acquisition module, a congestion detection module, a path planning module, a traffic police dispatch module and a facility dispatch module;
the data acquisition module is used for acquiring road condition information, traffic police information and facility information;
the congestion detection module is used for judging whether the road is in a congestion state according to the road condition information;
the path planning module is used for constructing a road congestion optimal route according to road condition information and traffic police information when the road is in a congestion state; solving the problem of the optimal route of road congestion to obtain a traffic police dispatching scheme;
the traffic police dispatch module is used for carrying out traffic police dispatch according to a traffic police dispatch scheme;
the facility scheduling module is used for performing facility scheduling according to road condition information and facility information.
Preferably, the road condition information includes a type of a lane, the number of vehicles on different types of lanes, a vehicle traveling speed, a length of a section of the different types of lanes, and a length of a low speed road in the section of the lane.
Preferably, the traffic police information comprises traffic police attendance information, traffic police status information and traffic police position information.
Preferably, the process of judging whether the road is in a congestion state includes: judging whether the length of the low-speed road is larger than a low-speed road length threshold value, if so, indicating that the road is in a congestion state, otherwise, indicating that the road is in a non-congestion state.
Preferably, the path planning module includes:
the traffic police dispatch number calculation module is used for calculating traffic police dispatch number according to road condition information;
the road congestion optimal route problem construction module is used for generating a road congestion optimal route problem according to the traffic police dispatching quantity, the traffic police information and the road condition information;
and the road congestion optimal route problem solving module is used for solving the road congestion optimal route problem to obtain a traffic police dispatching scheme.
Further, the process of calculating the traffic police dispatch number includes: calculating the average speed of the vehicle on the lane and the length ratio of the low-speed road of the ith lane according to the road condition information; calculating traffic flow on the lane according to the length ratio of the low speed road of the i-th lane and the running speed of the vehicle; calculating the mileage of the vehicle on the lane according to the total number of the lane types and the traffic flow on the lane; calculating the total mileage ratio of the vehicles on each type of lane according to the mileage of the vehicles on different lanes and the total travel distance of the vehicles on each type of lane; giving a congestion specific gravity weight of each type of lane, and calculating a traffic congestion index according to the total mileage ratio of the vehicles of each type of lane and the congestion specific gravity weight of each type of lane; and calculating the traffic police dispatching quantity according to the traffic congestion index and the total congestion length of the path.
Further, the formula for calculating the traffic police dispatch number is:
wherein N represents the traffic police dispatch quantity, K represents the traffic congestion index, L represents the total congestion length of the path,representing a rounding down.
Preferably, the road congestion optimal route problem is expressed as:
wherein F represents the minimum total distance from the traffic police to the accident site, A i (t) shows whether the ith traffic police is called at the moment t, B i (t) represents the ith intersection at time tC whether the police are busy i (t) represents whether the ith traffic police is attendance at the moment t, d mini The shortest path from the ith traffic police to the accident site is represented, N represents the traffic police dispatching quantity, K represents the traffic police dispatching quantity, and L represents the total congestion length of the path.
The beneficial effects of the invention are as follows: the emergency vehicle road congestion evacuation system designed by the invention can construct the road congestion optimal route problem according to the collected information under the condition of judging road section congestion, solve the road congestion optimal route problem, obtain a traffic police dispatching scheme and execute in time, relieve the congestion condition and improve the effect of emergency vehicles on handling accident sites; compared with the prior art, the method and the device can improve the efficiency of emergency tasks of the emergency vehicle, and greatly reduce the probability of tragedy caused by untimely tasks due to congestion.
Drawings
Fig. 1 is a schematic diagram of an emergency vehicle road congestion evacuation system based on the internet of vehicles in the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an emergency vehicle road congestion evacuation system based on the Internet of vehicles, as shown in fig. 1, the method comprises the following steps: the system comprises a data acquisition module, a congestion detection module, a path planning module, a traffic police dispatch module and a facility dispatch module;
the data acquisition module is used for acquiring road condition information, traffic police information and facility information.
The data acquisition module acquires data once every 5 minutes; the road condition information can be obtained from a 5G vehicle networking architecture, and comprises a lane type (main road, secondary road, branch road, express way), the number of vehicles on different types of lanes, the running speed of the vehicles, the length of road sections of different types of lanes, the length of low-speed road sections in the road sections and the like.
Each traffic police is equipped with a networking device equipped with a GPS; the traffic police information comprises traffic police attendance information, traffic police state information and traffic police position information; the traffic police position information is the current position coordinates of the traffic police; traffic police attendance information is expressed as:traffic police status information is expressed as: /> The traffic police attendance information and traffic police status information can be manually input by the traffic police or obtained according to the scheduling information.
The facility information includes location coordinates of facilities available for the road accessory.
The congestion detection module is used for judging whether the road is in a congestion state according to the road condition information. Specifically, a threshold value of the length of the expressway is preset; judging whether the length of the low-speed road is larger than a low-speed road length threshold value, if so, indicating that the road is in a congestion state, otherwise, indicating that the road is in a non-congestion state. Preferably, a road length in the section where the vehicle travel speed is less than 30km/h is set as the low speed road length.
If the current road is not in a congestion state, traffic police dispatch is not needed, and the emergency vehicle runs according to the shortest path reaching the accident site.
The path planning module is used for constructing a road congestion optimal route according to road condition information and traffic police information when the road is in a congestion state; and solving the problem of the optimal route of road congestion to obtain a traffic police dispatching scheme. The path planning module comprises a traffic police dispatching quantity calculation module, a road congestion optimal route problem construction module and a road congestion optimal route problem solving module:
the traffic police dispatch number calculation module is used for calculating traffic police dispatch number according to road condition information; the method specifically comprises the following steps:
step one: the average speed of the vehicle on the lane is calculated according to the road condition information, and the calculation formula is as follows:
wherein,,representing the average speed of the vehicle, V i Represents the travel speed of the ith vehicle on the lane, and M represents the total number of vehicles passing through the lane within 5 minutes of the measurement time.
Calculating the ratio K of the length of the low-speed road of the ith lane to the length of the lane section, namely the length of the low-speed road on the lane according to the road condition information i ：
Wherein K is i The length ratio of the expressway indicating the i-th lane, n1 indicates the number of the expressways, L i ' represents the link length of the i-th lane.
Step two: calculating traffic flow S on the lane according to the length ratio of the expressway of the ith lane and the running speed of the vehicle i 。
Wherein T represents a specified measurement time of 5 minutes.
Step three: and calculating the mileage of the vehicle on the lane according to the total number n of the lane types and the traffic flow on the lane.
Wherein L is i Total Indicating the number of mileage/l of the vehicle on the i-th lane i Represents the average mileage of the vehicle passing in 5 minutes of the ith lane, S i Representing traffic flow.
Step four: and calculating the total mileage ratio of the vehicles in each type of lane according to the mileage of the vehicles in different lanes and the total travel distance of the vehicles in each type of lane.
Wherein H is i Representing the total mileage ratio of the vehicle in the ith lane, L 1 Indicating the total mileage of the road vehicle, L 2 Indicating the total driving distance of the secondary trunk road vehicle, L 3 Indicating the total travel distance of the branched vehicles L 4 Indicating the total distance travelled by the highway vehicle.
Step five: giving the congestion weight A of each type of lane i And calculating a traffic congestion index according to the total mileage ratio of the vehicles of the various types of lanes and the congestion specific gravity weight of the various types of lanes.
Wherein K represents traffic congestion index, A i And the specific gravity weight value of the congestion of each type of lane is represented.
The traffic congestion index can be used for judging the degree of traffic congestion, and if the congestion index is larger than 35, the congestion index indicates that the congestion reaches a certain severity degree, and traffic police dispatch needs to be performed in time.
Step six: and calculating the traffic police dispatching quantity according to the traffic congestion index and the total congestion length of the path.
Wherein N represents the traffic police dispatch number; l represents the total congestion length of the path, i.e., the sum of the lengths of the low-speed roads in the congestion state in all lanes.
The road congestion optimal route problem construction module is used for generating a road congestion optimal route problem according to the traffic police dispatching quantity, the traffic police information and the road condition information; specific: calculating the minimum total distance of all traffic polices to the accident site, constructing a road congestion optimal route problem by taking the minimum total distance as an optimization target and the traffic polices scheduling number as constraint conditions, wherein the road congestion optimal route problem is expressed as:
wherein F represents the minimum total distance from the traffic police to the accident site, A i (t) represents whether the ith traffic police is invoked, B i (t) indicates whether the ith traffic police is busy, C i (t) represents whether the ith traffic police is attendance, d mini Representing the shortest path of the ith traffic police to the accident site.
The system comprises a road congestion optimal route problem solving module, a traffic police dispatching scheme and a traffic police dispatching system, wherein the road congestion optimal route problem solving module is used for solving the road congestion optimal route problem to obtain the traffic police dispatching scheme, and the traffic police dispatching scheme comprises the steps of selecting and dispatching traffic police and routes for each traffic police to arrive at an accident site.
The traffic police dispatch module is used for carrying out traffic police dispatch according to a traffic police dispatch scheme. The traffic police dispatch module sends prompt instructions to all selected traffic police according to traffic police dispatch and provides navigation routes for the traffic police dispatch module, and the traffic police can quickly arrive at a designated place according to the navigation routes, so that the congested vehicles can be quickly evacuated.
The facility scheduling module is used for performing facility scheduling according to road condition information and facility information. The facility scheduling module combines road condition information and facility information to call some facilities of the accident site environment, and can identify whether a destination is in a roadway, whether a blockage exists in the roadway or whether available water sources exist around the roadway or not. According to the situations, the system can be connected with local property or other units to cooperate with evacuation of emergency, so that the emergency vehicle can reach the destination smoothly.
The invention can improve the efficiency of emergency tasks of emergency vehicles and greatly reduce the probability of tragedy caused by untimely tasks due to congestion.
While the foregoing is directed to embodiments, aspects and advantages of the present invention, other and further details of the invention may be had by the foregoing description, it will be understood that the foregoing embodiments are merely exemplary of the invention, and that any changes, substitutions, alterations, etc. which may be made herein without departing from the spirit and principles of the invention.
Claims (8)
1. An emergency vehicle road congestion evacuation system based on the internet of vehicles, comprising: the system comprises a data acquisition module, a congestion detection module, a path planning module, a traffic police dispatch module and a facility dispatch module;
the data acquisition module is used for acquiring road condition information, traffic police information and facility information;
the congestion detection module is used for judging whether the road is in a congestion state according to the road condition information;
the path planning module is used for constructing a road congestion optimal route according to road condition information and traffic police information when the road is in a congestion state; solving the problem of the optimal route of road congestion to obtain a traffic police dispatching scheme;
the traffic police dispatch module is used for carrying out traffic police dispatch according to a traffic police dispatch scheme;
the facility scheduling module is used for performing facility scheduling according to road condition information and facility information.
2. The emergency vehicle road congestion evacuation system based on the internet of vehicles according to claim 1, wherein the road condition information includes a type of a lane, the number of vehicles on different types of lanes, a traveling speed of the vehicle, a length of a section of the different types of lanes, and a length of a low speed road in the section of the lane.
3. The vehicle networking based emergency vehicle roadway congestion evacuation system of claim 1, wherein the traffic police information comprises traffic police attendance information, traffic police status information, and traffic police location information.
4. The emergency vehicle road congestion evacuation system based on the internet of vehicles according to claim 1, wherein the process of judging whether the road is in a congested state comprises: judging whether the length of the low-speed road is larger than a low-speed road length threshold value, if so, indicating that the road is in a congestion state, otherwise, indicating that the road is in a non-congestion state.
5. The vehicle networking based emergency vehicle roadway congestion evacuation system of claim 1, wherein the path planning module comprises:
the traffic police dispatch number calculation module is used for calculating traffic police dispatch number according to road condition information;
the road congestion optimal route problem construction module is used for generating a road congestion optimal route problem according to the traffic police dispatching quantity, the traffic police information and the road condition information;
and the road congestion optimal route problem solving module is used for solving the road congestion optimal route problem to obtain a traffic police dispatching scheme.
6. The emergency vehicle road congestion evacuation system based on the internet of vehicles according to claim 5, wherein the process of calculating the traffic police dispatch number comprises: calculating the average speed of the vehicle on the lane and the length ratio of the low-speed road of the ith lane according to the road condition information; calculating traffic flow on the lane according to the length ratio of the low speed road of the i-th lane and the running speed of the vehicle; calculating the mileage of the vehicle on the lane according to the total number of the lane types and the traffic flow on the lane; calculating the total mileage ratio of the vehicles on each type of lane according to the mileage of the vehicles on different lanes and the total travel distance of the vehicles on each type of lane; giving a congestion specific gravity weight of each type of lane, and calculating a traffic congestion index according to the total mileage ratio of the vehicles of each type of lane and the congestion specific gravity weight of each type of lane; and calculating the traffic police dispatching quantity according to the traffic congestion index and the total congestion length of the path.
7. The emergency vehicle road congestion evacuation system based on the internet of vehicles according to claim 6, wherein the formula for calculating the traffic police dispatch number is:
wherein N represents the traffic police dispatch quantity, K represents the traffic congestion index, L represents the total congestion length of the path,representing a rounding down.
8. An emergency vehicle road congestion evacuation system based on the internet of vehicles according to claim 1, wherein the road congestion optimum route problem is expressed as:
wherein F represents the minimum total distance from the traffic police to the accident site, A i (t) shows whether the ith traffic police is called at the moment t, B i (t) indicates whether the ith traffic police is busy at time t, C i (t) represents whether the ith traffic police is attendance at the moment t, d mini The shortest path from the ith traffic police to the accident site is represented, N represents the traffic police dispatching quantity, K represents the traffic police dispatching quantity, and L represents the total congestion length of the path.
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| CN116631211B (en) | 2024-07-05 |
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