Method and system for improving passing efficiency of emergency vehicle

Abstract

The invention belongs to the technical field of traffic management, and particularly discloses a method and system for improving the traffic efficiency of an emergency vehicle, and the method comprises the steps: carrying out the planning of an emergency vehicle route, predicting the traffic intervention efficiency of a congested road section in an emergency route based on a congestion intervention efficiency prediction model, and carrying out the traffic intervention efficiency prediction based on a traffic intervention efficiency prediction value. Calculating the predicted time income of each road section, then determining an optimal route and intervening traffic police, scheduling the intervening traffic police based on the optimal route, and constructing a traffic police first-aid linkage mode. The method can comprehensively consider the predicted time benefit under the intervention of the on-duty traffic police, determines the optimal driving route, schedules the on-duty traffic police according to the optimal route, can carry out the dynamic adjustment based on the real-time road condition information, facilitates the improvement of the first-aid vehicle passing efficiency, reduces the time for the first-aid vehicle to transport a patient, and improves the first-aid treatment efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of traffic management, and in particular relates to a method and a system for improving the passage efficiency of emergency vehicles. Background Art

[0002] When performing emergency tasks, emergency vehicles need to arrive at the scene as quickly as possible to carry out rescue and treatment. Time is of the utmost importance in treating patients. Ensuring the efficiency of emergency vehicles is to protect public safety and the lives and health of the people.

[0003] Existing methods for improving the traffic efficiency of emergency vehicles include Chinese patent applications CN116844355A and CN114283594A, where:

[0004] CN116844355A discloses a traffic control method for improving the traffic efficiency of emergency vehicles. The method installs visible light communication devices on all vehicles and intersection lights, uses the devices as a medium to notify other vehicles to avoid emergency vehicles, and adjusts intersection lights through the devices, thereby improving the traffic efficiency of emergency vehicles. The disadvantages of this method are: 1. The cost is too high. This solution requires all vehicles and intersections on the road to install communication devices, which is costly and difficult to implement; 2. This solution can only improve the traffic efficiency within a certain distance range of emergency vehicles, lacks a method for improving the traffic efficiency of the route ahead, and lacks overall route planning and dynamic adjustment.

[0005] CN114283594A discloses a method for optimizing the path of special vehicles with dynamic adjustment. The method is conducive to the passage of emergency vehicles by dynamically adjusting the traffic lights on the route of emergency vehicles. However, its disadvantages are: 1. Traffic conditions change in real time. After the path planning is determined in this scheme, the route will not be dynamically adjusted according to the actual situation, which is not conducive to dealing with sudden traffic congestion on the original route; 2. In special cases where the road is blocked due to road traffic accidents and other reasons, adjusting the traffic lights cannot solve the congestion problem of the road section; 3. The cost is high. This scheme uses a camera to obtain video to detect the number of vehicles on the road and the license plate number in real time, and the equipment cost and computing power cost are high.

[0006] Therefore, there is an urgent need for a method that can more effectively help improve the traffic efficiency of emergency vehicles. Summary of the invention

[0007] The purpose of the present invention is to provide a method and system for improving the traffic efficiency of emergency vehicles, so as to solve the above-mentioned problems existing in the prior art.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] In a first aspect, a method for improving the traffic efficiency of emergency vehicles is provided, comprising:

[0010] S1 obtains an emergency mission request for an emergency vehicle, and obtains emergency mission information of the emergency vehicle in real time after obtaining the emergency mission request, the emergency mission information includes the vehicle's current location information and destination location information;

[0011] S2. Determine several alternative routes for the emergency vehicle to reach the destination from the current position and the estimated travel time corresponding to each alternative route based on the vehicle's current position information and the destination position information;

[0012] S3. Split each alternative route into corresponding multiple sections, and determine the real-time traffic information and on-duty traffic police information of each section of each alternative route;

[0013] S4. Determine the sections of each alternative route to be intervened according to the real-time traffic information of each section of each alternative route, and determine the impact time of each section of each alternative route to be intervened according to the real-time traffic information and on-duty traffic police information of each section of each alternative route to be intervened;

[0014] S5. Determine the estimated time required for traffic police intervention on each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened on each alternative route;

[0015] S6. Selecting the one with the least estimated time for traffic police intervention from the alternative routes according to the estimated time for traffic police intervention of each alternative route as the best route;

[0016] S7. Send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

[0017] In one possible design, the method further includes:

[0018] At the next moment, steps S2-S6 are repeated to obtain an updated optimal route, and the estimated time result T' of the traffic police intervention corresponding to the updated optimal route is determined;

[0019] like and / or T 0 -T'>ΔT, where T 0is the estimated time result of traffic police intervention corresponding to the best route before update, θ is the set ratio threshold, ΔT is the set difference threshold, then it is determined that the emergency vehicle needs to change the route, the updated best route is sent to the emergency vehicle, and the emergency mission road intervention support message is sent to the on-duty traffic police corresponding to each section to be intervened in the updated best route, and a cancellation notice is sent to the on-duty traffic police corresponding to each section to be intervened in the best route before update, otherwise, it is determined that the emergency vehicle does not need to change the route.

[0020] In a possible design, splitting each alternative route into corresponding multiple sections includes:

[0021] Determine that the number of alternative routes is m, and each alternative route includes corresponding road segment division information;

[0022] Each alternative route is split into multiple sections according to the section division information of each alternative route. The maximum number of sections split from each alternative route is n. The sections of each alternative route are arranged in order.

[0023] In a possible design, the real-time traffic information includes a road section congestion status information set and a road section congestion influencing factor information set, wherein the road section congestion influencing factor information set includes an average traffic speed v, and the on-duty traffic police information includes the position of the on-duty traffic police corresponding to the road section and the shortest time t for the on-duty traffic police to arrive at the road section. 3 .

[0024] In a possible design, determining the road section to be intervened in each alternative route according to the real-time traffic information of each road section in each alternative route includes:

[0025] Substitute the average speed v of each section of the alternative route into the congestion degree formula d = ln (v 0 )-ln(v) to obtain the congestion degree d of each road section, where v 0 is the preset speed constant;

[0026] The congestion level d in the alternative route is greater than the set congestion level threshold d 0 The sections are used as the sections to be intervened in the alternative routes, and the remaining sections are used as the non-intervention sections in the alternative routes.

[0027] In a possible design, determining the intervention impact time of each section to be intervened in each alternative route according to the real-time traffic information of each section to be intervened in each alternative route and the on-duty traffic police information includes:

[0028] Based on the estimated travel time of the alternative route, determine the time t for the emergency vehicle to travel from the current position to the corresponding section to be intervened in the alternative route. 1, and the time t for the emergency vehicle to travel from the current position to the corresponding section of the alternative route to be intervened 2 ;

[0029] The time t from the emergency vehicle's current position to the corresponding road section to be intervened 1 , the time t for the emergency vehicle to drive out of the corresponding road section to be intervened from the current position 2 and the shortest time t for the on-duty traffic police to reach the corresponding section of road to be intervened 3 Substitute into the calculation formula of the impact time to be intervened, and calculate to obtain the impact time t of the corresponding section to be intervened in the alternative route. The calculation formula of the impact time to be intervened is:

[0030]

[0031] In a possible design, the estimated time result of the traffic police intervention on each alternative route is determined based on the estimated travel time of each alternative route and the impact time of each section to be intervened in each alternative route, including:

[0032] Using the information set of the road congestion influencing factors corresponding to the road section to be intervened in the alternative route, a normalized vector x of the congestion influencing factors corresponding to the road section to be intervened is formed;

[0033] Substitute the normalized vector x of the congestion influencing factors corresponding to the section to be intervened into the congestion intervention efficiency prediction model y=ω of the section to be intervened T Calculate in x+b to get the predicted value y of the congestion intervention efficiency of the road section to be intervened, where ω is the column vector of the weight coefficients of the congestion influencing factors corresponding to the road section to be intervened, ω T represents the transposed vector of ω, and b is the intercept vector corresponding to the road section to be intervened;

[0034] Set the congestion intervention efficiency of the non-intervention sections in the alternative route to 0, and use the congestion intervention efficiency prediction value y of each section to be intervened in the alternative route and the congestion intervention efficiency of each non-intervention section to form a vector a. If the number of sections in the alternative route is less than n, fill the vector a with a 0 vector to make its vector dimension n;

[0035] The congestion degree d of each road section in the alternative route is used to form a vector D. If the number of road sections in the alternative route is less than n, the vector D is padded with 0 vectors to make its vector dimension n;

[0036] Calculate the result vector of the alternative route β = a T °D T , where T represents vector transpose and ° represents Hadamard product operation;

[0037] The result vectors β of the m alternative routes are used to form an m×n dimensional matrix A;

[0038] The intervention impact time of the non-intervention section in the alternative route is set to 0, and the intervention impact time t of each intervention section in the alternative route and the intervention impact time of each non-intervention section are used to form a vector τ. If the number of sections in the alternative route is less than n, the vector τ is padded with a 0 vector to make its vector dimension n;

[0039] The vectors τ of the m alternative routes are used to form an m×n dimensional matrix B;

[0040] The estimated travel time of m alternative routes is used to form a column vector g with a vector dimension of m;

[0041] Substitute the column vector g, matrix A and matrix B into the traffic police intervention estimated time result vector formula r = g-((EA)·B°I·λ) to calculate, and obtain the traffic police intervention estimated time result vector r, where E represents an m×n dimensional matrix with all elements being 1, I is an m×n dimensional matrix with all diagonal elements being 1 and the rest being 0, and λ is a column vector with all elements being 1 and a vector dimension of m;

[0042] Each element value in the traffic police intervention estimated time result vector r corresponds to the traffic police intervention estimated time result of each alternative route.

[0043] In one possible design, the method further includes:

[0044] Get the actual travel time t of the emergency vehicle through the optimal route corresponding to the intervention section act , and the information set of factors affecting the congestion of the road section to be intervened, and based on the estimated travel time of the optimal route, determine the estimated travel time t of the emergency vehicle through the corresponding road section to be intervened on the optimal route pre ;

[0045] The estimated travel time t pre and the actual travel time t act Substitute the actual congestion intervention efficiency formula into Calculate in to obtain the actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route;

[0046] The actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route and the information set of the section congestion influencing factors are used as the traffic congestion information data of the section to be intervened, the traffic congestion information data of the section to be intervened is saved in a database, and the traffic congestion information data of the section to be intervened is used to iteratively optimize and train the congestion intervention efficiency prediction model.

[0047] In a second aspect, a system for improving the traffic efficiency of emergency vehicles is provided, including an information acquisition unit, a route determination unit, a route splitting unit, an intervention determination unit, a duration estimation unit, a route selection unit and a dispatching command unit, wherein:

[0048] An information acquisition unit, used to acquire an emergency task request for an emergency vehicle, and acquire emergency task information of the emergency vehicle in real time after acquiring the emergency task request, wherein the emergency task information includes the vehicle's current position information and destination position information;

[0049] A route determination unit, used to determine a number of alternative routes for the emergency vehicle to reach the destination from the current position at the moment and the estimated travel time corresponding to each alternative route according to the vehicle's current position information and the destination position information;

[0050] A route splitting unit is used to split each alternative route into corresponding multiple sections, and determine the real-time traffic information and on-duty traffic police information of each section in each alternative route;

[0051] An intervention determination unit, used to determine the road section to be intervened in each alternative route according to the real-time traffic information of each road section in each alternative route, and determine the intervention impact time of each road section to be intervened in each alternative route according to the real-time traffic information of each road section to be intervened in each alternative route and the on-duty traffic police information;

[0052] A duration estimation unit, used to determine the estimated time result of the traffic police intervention for each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened in each alternative route;

[0053] A route selection unit, configured to select a route with the least traffic police intervention estimated time result from among the alternative routes according to the traffic police intervention estimated time results of the alternative routes as the best route;

[0054] The dispatching and commanding unit is used to send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

[0055] In a third aspect, a system for improving the traffic efficiency of emergency vehicles is provided, comprising:

[0056] A memory for storing instructions;

[0057] A processor is used to read the instructions stored in the memory and execute any one of the methods described in the first aspect according to the instructions.

[0058] In a fourth aspect, a computer-readable storage medium is provided, wherein instructions are stored on the computer-readable storage medium, and when the instructions are executed on a computer, the computer executes any one of the methods described in the first aspect. In addition, a computer program product is provided, and when the computer program product is executed on a computer, the computer executes any one of the methods described in the first aspect.

[0059] Beneficial effects: The present invention constructs a traffic police-first aid linkage mode, can plan emergency vehicle routes, comprehensively consider the expected time benefits under the intervention of on-duty traffic police, determine the best driving route, and dispatch on-duty traffic police according to the best route. At the same time, it can make dynamic adjustments based on real-time traffic information, which helps to improve the travel efficiency of emergency vehicles, reduce the time for ambulances to transport patients, and improve the efficiency of emergency treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 This is a schematic diagram of the steps of the method in Example 1 of the present invention;

[0062] Figure 2 This is a schematic diagram of the structure of the system in Example 2 of the present invention;

[0063] Figure 3 Schematic diagram of the system structure in Example 3 of the present invention. DETAILED DESCRIPTION

[0064] It should be noted that the description of these embodiments is intended to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only intended to describe exemplary embodiments of the present invention. However, the present invention can be embodied in a number of alternative forms, and should not be construed as being limited to the embodiments set forth herein.

[0065] It should be understood that unless otherwise clearly specified and limited, the corresponding terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments can be understood according to specific circumstances.

[0066] In the following description, certain details are provided to facilitate a complete understanding of the example embodiments. However, it will be appreciated by those of ordinary skill in the art that the example embodiments may be implemented without these certain details. For example, devices may be shown in block diagrams to avoid obscuring the examples with unnecessary details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid obscuring the embodiments.

[0067] Embodiment 1:

[0068] This embodiment provides a method for improving the traffic efficiency of emergency vehicles, which can be applied to corresponding traffic management systems, such as Figure 1 As shown, the method comprises the following steps:

[0069] S1. Obtain an emergency task request for an emergency vehicle, and after obtaining the emergency task request, obtain emergency task information of the emergency vehicle in real time, wherein the emergency task information includes the vehicle's current location information and destination location information.

[0070] In specific implementation, when the system receives an emergency mission request for an emergency vehicle from an emergency vehicle or an emergency center, it begins to assist the emergency vehicle in passing, and then obtains the emergency mission information of the emergency vehicle in real time. The emergency mission information includes the vehicle's current location information and destination location information.

[0071] S2. Determine several alternative routes for the emergency vehicle to reach the destination from the current position and the estimated travel time corresponding to each alternative route based on the vehicle's current position information and the destination position information.

[0072] In specific implementation, after obtaining the vehicle's current location information and destination location information, the system can call a third-party electronic map service API, input the vehicle's current location information and destination location information, determine m alternative routes for the emergency vehicle to reach the destination from the current location and the estimated travel time corresponding to each alternative route, and the estimated travel time of the m alternative routes can be used to form a column vector g with a vector dimension of m.

[0073] S3. Split each alternative route into a corresponding plurality of road sections, and determine the real-time traffic information and on-duty traffic police information of each road section in each alternative route.

[0074] In specific implementation, each alternative route contains corresponding road segment division information. The system can split each alternative route into multiple road segments according to the road segment division information of each alternative route. The maximum number of road segments split from each alternative route is n, and the road segments of each alternative route are arranged in order. Then, the real-time traffic condition information and on-duty traffic police information of each road segment in each alternative route are determined. The real-time traffic condition information can be derived from the system's road information monitoring center, including a road segment congestion status information set and a road segment congestion influencing factor information set. The road segment congestion status information set may include the road status of the road segment and whether it is congested, etc. The road segment congestion influencing factor information set includes the average travel speed v, as well as the cause of congestion, congestion distance, congestion traffic volume, temperature during congestion, and rainfall during congestion, etc. The on-duty traffic police information can be derived from the system's traffic police positioning command center information. The on-duty traffic police information includes the location of the on-duty traffic police corresponding to the road segment and the shortest time t for the on-duty traffic police to reach the road segment. 3 wait.

[0075] S4. Determine the sections to be intervened in each alternative route based on the real-time traffic information of each section in each alternative route, and determine the impact time of each section to be intervened in each alternative route based on the real-time traffic information and on-duty traffic police information of each section to be intervened in each alternative route.

[0076] In specific implementation, the system can substitute the average speed v of each section of the alternative route into the congestion degree formula d = ln (v 0 )-ln(v) to obtain the congestion degree d of each road section, where v 0 is the preset speed constant. Then the congestion level d in the alternative route is greater than the set congestion level threshold d 0 The sections are used as the sections to be intervened in the alternative routes, and the remaining sections are used as the non-intervention sections in the alternative routes.

[0077] Then, the time t for the emergency vehicle to travel from the current position to the corresponding section to be intervened in the alternative route can be determined based on the estimated travel time corresponding to the alternative route. 1 , and the time t for the emergency vehicle to travel from the current position to the corresponding section of the alternative route to be intervened 2 The time t from the emergency vehicle's current position to the corresponding section to be intervened is calculated as 1 , the time t for the emergency vehicle to drive out of the corresponding road section to be intervened from the current position 2 and the shortest time t for the on-duty traffic police to reach the corresponding section of road to be intervened 3 Substitute into the calculation formula of the impact time to be intervened, and calculate to obtain the impact time t of the corresponding section to be intervened in the alternative route. The calculation formula of the impact time to be intervened is:

[0078]

[0079] S5. Determine the estimated time required for traffic police intervention on each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened on each alternative route.

[0080] In specific implementation, the system can use the information set of the congestion influencing factors of the corresponding section to be intervened in the alternative route to form a normalized vector x of the congestion influencing factors of the corresponding section to be intervened; substitute the normalized vector x of the congestion influencing factors of the corresponding section to be intervened into the congestion intervention efficiency prediction model y=ω of the section to be intervened T Calculate in x+b to get the predicted value y of the congestion intervention efficiency of the road section to be intervened, where ω is the column vector of the weight coefficients of the congestion influencing factors corresponding to the road section to be intervened, ω T The transposed vector representing ω, b is the intercept vector corresponding to the section to be intervened; the congestion intervention efficiency of the non-intervention section in the alternative route is set to 0, and the congestion intervention efficiency prediction value y of each section to be intervened in the alternative route and the congestion intervention efficiency of each non-intervention section are used to form a vector a. If the number of sections in the alternative route is less than n, the vector a is padded with a 0 vector to make its vector dimension n.

[0081] The congestion degree d of each section in the alternative route can be used to form a vector D. If the number of sections in the alternative route is less than n, the vector D is padded with 0 vectors to make its vector dimension n; the result vector of the alternative route is calculated Wherein, T represents vector transposition, ° represents Hadamard product operation; then, the result vectors β of m alternative routes are used to form an m×n dimensional matrix A.

[0082] The intervention impact time of the non-intervention section in the alternative route can be set to 0, and the intervention impact time t of each intervention section in the alternative route and the intervention impact time of each non-intervention section are used to form a vector τ. If the number of sections in the alternative route is less than n, the vector τ is padded with a 0 vector to make its vector dimension n; the vector τ of m alternative routes is used to form an m×n dimensional matrix B.

[0083] Finally, based on the estimated travel time of m alternative routes, a column vector g with a vector dimension of m is formed. The column vector g, matrix A and matrix B are substituted into the traffic police intervention estimated time result vector formula Calculation is performed to obtain the traffic police intervention estimated time result vector r, where E represents an m×n dimensional matrix with all elements being 1, I is an m×n dimensional matrix with all diagonal elements being 1 and the rest being 0, and λ is a column vector with all elements being 1 and a vector dimension of m. The values ​​of each element in the traffic police intervention estimated time result vector r correspond to the traffic police intervention estimated time results for each alternative route.

[0084] S6. According to the estimated time required for traffic police intervention of each alternative route, the one with the least estimated time required for traffic police intervention is selected from the alternative routes as the best route.

[0085] In specific implementation, after obtaining the traffic police intervention estimated time result vector r, the system can determine the traffic police intervention estimated time results of each alternative route, and select the one with the least traffic police intervention estimated time result as the best route.

[0086] S7. Send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

[0087] During specific implementation, the system sends the best route to the emergency vehicle so that the emergency vehicle can travel according to the best route, and generates an emergency mission road intervention support message, and sends the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route, so that the on-duty traffic police corresponding to each section to be intervened in the best route can conduct rapid traffic intervention to improve the traffic efficiency of the emergency vehicle.

[0088] When the emergency vehicle is traveling along the optimal route, the system can obtain the actual travel time t of the emergency vehicle through the corresponding section to be intervened along the optimal route. act , and the information set of factors affecting the congestion of the road section to be intervened, including the cause of congestion, congestion distance, congestion traffic volume, temperature during congestion, and rainfall during congestion, etc., and the estimated travel time t of the emergency vehicle through the corresponding road section to be intervened on the optimal route is determined based on the estimated travel time of the optimal route pre ; Then the estimated travel time t pre and the actual travel time t act Substitute the actual congestion intervention efficiency formula into Calculation is performed to obtain the actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route; finally, the actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route and the information set of the section congestion influencing factors are used as the traffic congestion information data of the section to be intervened, the traffic congestion information data of the section to be intervened is saved in a database, and the traffic congestion information data of the section to be intervened is used to iteratively optimize and train the congestion intervention efficiency prediction model.

[0089] And when the emergency vehicle is traveling along the optimal route, the system obtains the emergency mission information of the emergency vehicle in real time, repeats steps S2-S6, obtains the updated optimal route, and determines the estimated time result T' of the traffic police intervention corresponding to the updated optimal route. and / or T 0 -T'>ΔT, where T 0is the estimated time result of traffic police intervention corresponding to the best route before update, θ is the set ratio threshold, ΔT is the set difference threshold, then it is determined that the emergency vehicle needs to change the route, the updated best route is sent to the emergency vehicle, and the emergency mission road intervention support message is sent to the on-duty traffic police corresponding to each section to be intervened in the updated best route, and a cancellation notice is sent to the on-duty traffic police corresponding to each section to be intervened in the best route before update, otherwise, it is determined that the emergency vehicle does not need to change the route.

[0090] By constructing a traffic police-emergency linkage mode, this method can plan emergency vehicle routes, comprehensively consider the expected time benefits under the intervention of on-duty traffic police, determine the best driving route, and dispatch on-duty traffic police according to the best route. At the same time, it can make dynamic adjustments based on real-time traffic information, which helps to improve the travel efficiency of emergency vehicles, reduce the time for ambulances to transport patients, and improve the efficiency of emergency treatment.

[0091] Embodiment 2:

[0092] This embodiment provides a system for improving the traffic efficiency of emergency vehicles. Figure 2 As shown, it includes an information acquisition unit, a route determination unit, a route splitting unit, an intervention determination unit, a duration estimation unit, a route selection unit and a dispatching command unit, wherein:

[0093] An information acquisition unit, used to acquire an emergency task request for an emergency vehicle, and acquire emergency task information of the emergency vehicle in real time after acquiring the emergency task request, wherein the emergency task information includes the vehicle's current position information and destination position information;

[0094] A route determination unit, used to determine a number of alternative routes for the emergency vehicle to reach the destination from the current position at the moment and the estimated travel time corresponding to each alternative route according to the vehicle's current position information and the destination position information;

[0095] A route splitting unit is used to split each alternative route into corresponding multiple sections, and determine the real-time traffic information and on-duty traffic police information of each section in each alternative route;

[0096] An intervention determination unit, used to determine the road section to be intervened in each alternative route according to the real-time traffic information of each road section in each alternative route, and determine the intervention impact time of each road section to be intervened in each alternative route according to the real-time traffic information of each road section to be intervened in each alternative route and the on-duty traffic police information;

[0097] A duration estimation unit, used to determine the estimated time result of the traffic police intervention for each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened in each alternative route;

[0098] A route selection unit, configured to select a route with the least traffic police intervention estimated time result from among the alternative routes according to the traffic police intervention estimated time results of the alternative routes as the best route;

[0099] The dispatching and commanding unit is used to send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

[0100] Embodiment 3:

[0101] This embodiment provides a system for improving the traffic efficiency of emergency vehicles. Figure 3 As shown, at the hardware level, it includes:

[0102] Data interface, used to establish data connection between the processor and the external data terminal;

[0103] A memory for storing instructions;

[0104] The processor is used to read the instructions stored in the memory and execute the method for improving the traffic efficiency of emergency vehicles in Example 1 according to the instructions.

[0105] Optionally, the system further includes an internal bus, through which the processor, the memory and the data interface can be interconnected, and the internal bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0106] The memory may include, but is not limited to, random access memory (RAM), read only memory (ROM), flash memory, first input first output (FIFO) and / or first in last out (FILO) memory, etc. The processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0107] Embodiment 4:

[0108] This embodiment provides a computer-readable storage medium, on which instructions are stored. When the instructions are executed on a computer, the computer executes the method for improving the traffic efficiency of emergency vehicles in Embodiment 1. The computer-readable storage medium refers to a carrier for storing data, which may include but is not limited to a floppy disk, an optical disk, a hard disk, a flash memory, a USB flash drive, and / or a memory stick, etc. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0109] This embodiment also provides a computer program product, which, when executed on a computer, executes the method for improving the traffic efficiency of emergency vehicles in Embodiment 1. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device.

[0110] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for improving the traffic efficiency of emergency vehicles, characterized in that: include: S1 obtains an emergency mission request for an emergency vehicle, and obtains emergency mission information of the emergency vehicle in real time after obtaining the emergency mission request, the emergency mission information includes the vehicle's current location information and destination location information; S2. Determine several alternative routes for the emergency vehicle to reach the destination from the current position and the estimated travel time corresponding to each alternative route based on the vehicle's current position information and the destination position information; S3. Split each alternative route into corresponding multiple sections, and determine the real-time traffic information and on-duty traffic police information of each section of each alternative route; S4. Determine the sections of each alternative route to be intervened according to the real-time traffic information of each section of each alternative route, and determine the impact time of each section of each alternative route to be intervened according to the real-time traffic information and on-duty traffic police information of each section of each alternative route to be intervened; S5. Determine the estimated time required for traffic police intervention on each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened on each alternative route; S6. Selecting the one with the least estimated time for traffic police intervention from the alternative routes as the best route according to the estimated time for traffic police intervention of each alternative route; S7. Send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

2. A method for improving the traffic efficiency of emergency vehicles according to claim 1, characterized in that: The method further comprises: At the next moment, steps S2-S6 are repeated to obtain an updated optimal route, and the estimated time result T' of the traffic police intervention corresponding to the updated optimal route is determined; like And / or T0-T'>ΔT, where T0 is the estimated time result of the traffic police intervention corresponding to the best route before the update, θ is the set ratio threshold, and ΔT is the set difference threshold, then it is determined that the emergency vehicle needs to change the route, the updated best route is sent to the emergency vehicle, and the emergency mission road intervention support message is sent to the on-duty traffic police corresponding to each section to be intervened in the updated best route, and a cancellation notice is sent to the on-duty traffic police corresponding to each section to be intervened in the best route before the update; otherwise, it is determined that the emergency vehicle does not need to change the route.

3. A method for improving the traffic efficiency of emergency vehicles according to claim 1, characterized in that: The step of splitting each candidate route into a corresponding plurality of sections includes: Determine that the number of alternative routes is m, and each alternative route includes corresponding road segment division information; Each alternative route is split into multiple sections according to the section division information of each alternative route. The maximum number of sections split from each alternative route is n. The sections of each alternative route are arranged in order.

4. A method for improving the traffic efficiency of emergency vehicles according to claim 3, characterized in that: The real-time traffic condition information includes a road section congestion status information set and a road section congestion influencing factor information set, the road section congestion influencing factor information set includes an average travel speed v, and the on-duty traffic police information includes the position of the on-duty traffic police corresponding to the road section and the shortest time t3 for the on-duty traffic police to arrive at the road section.

5. A method for improving the traffic efficiency of emergency vehicles according to claim 4, characterized in that: The step of determining the road section to be intervened in each alternative route according to the real-time traffic information of each road section in each alternative route includes: Substitute the average speed v of each section in the alternative route into the congestion degree formula d=ln(v0)-ln(v) to calculate the congestion degree d of each section, where v0 is a preset speed constant; The sections in the alternative routes whose congestion degree d is greater than the set congestion degree threshold d0 are taken as the sections to be intervened in the alternative routes, and the remaining sections are taken as the non-intervention sections in the alternative routes.

6. A method for improving the traffic efficiency of emergency vehicles according to claim 5, characterized in that: The determining of the intervention impact time of each section to be intervened in each alternative route according to the real-time traffic condition information of each section to be intervened in each alternative route and the on-duty traffic police information includes: Determine the time t1 for the emergency vehicle to enter the corresponding section to be intervened in the alternative route from the current position based on the estimated travel time corresponding to the alternative route, and the time t2 for the emergency vehicle to exit the corresponding section to be intervened in the alternative route from the current position; Substitute the time t1 from the current position of the emergency vehicle to the corresponding section to be intervened, the time t2 from the current position of the emergency vehicle to the corresponding section to be intervened, and the shortest time t3 for the on-duty traffic police to arrive at the section to be intervened into the intervention impact time formula for calculation, and obtain the intervention impact time t of the corresponding section to be intervened in the alternative route. The intervention impact time formula is:

7. A method for improving the traffic efficiency of emergency vehicles according to claim 6, characterized in that: The estimated time result of the traffic police intervention on each alternative route is determined based on the estimated travel time of each alternative route and the impact time of each section to be intervened in each alternative route, including: Using the information set of the congestion influencing factors of the road section corresponding to the road section to be intervened in the alternative route, a normalized vector x of the congestion influencing factors of the road section to be intervened is formed; Substitute the normalized vector x of the congestion influencing factors corresponding to the section to be intervened into the congestion intervention efficiency prediction model y=ω of the section to be intervened T Calculate in x+b to get the predicted value y of the congestion intervention efficiency of the road section to be intervened, where ω is the column vector of the weight coefficients of the congestion influencing factors corresponding to the road section to be intervened, ω T represents the transposed vector of ω, and b is the intercept vector corresponding to the road section to be intervened; Set the congestion intervention efficiency of the non-intervention sections in the alternative route to 0, and use the congestion intervention efficiency prediction value y of each section to be intervened in the alternative route and the congestion intervention efficiency of each non-intervention section to form a vector a. If the number of sections in the alternative route is less than n, fill the vector a with a 0 vector to make its vector dimension n; The congestion degree d of each road section in the alternative route is used to form a vector D. If the number of road sections in the alternative route is less than n, the vector D is padded with 0 vectors to make its vector dimension n; Calculate the result vector of the alternative route β = a T °D T , where T represents vector transpose and ° represents Hadamard product operation; The result vectors β of the m alternative routes are used to form an m×n dimensional matrix A; The intervention impact time of the non-intervention section in the alternative route is set to 0, and the intervention impact time t of each intervention section in the alternative route and the intervention impact time of each non-intervention section are used to form a vector τ. If the number of sections in the alternative route is less than n, the vector τ is padded with a 0 vector to make its vector dimension n; The vectors τ of the m alternative routes are used to form an m×n dimensional matrix B; The estimated travel time of m alternative routes is used to form a column vector g with a vector dimension of m; Substitute the column vector g, matrix A and matrix B into the traffic police intervention estimated time result vector formula r = g-((EA)·B°I·λ) to calculate, and obtain the traffic police intervention estimated time result vector r, where E represents an m×n dimensional matrix with all elements being 1, I is an m×n dimensional matrix with all diagonal elements being 1 and the rest being 0, and λ is a column vector with all elements being 1 and a vector dimension of m; Each element value in the traffic police intervention estimated time result vector r corresponds to the traffic police intervention estimated time result of each alternative route.

8. A method for improving the traffic efficiency of emergency vehicles according to claim 5, characterized in that: The method further comprises: Get the actual travel time t of the emergency vehicle through the optimal route corresponding to the intervention section act , and the information set of factors affecting the congestion of the road section to be intervened, and based on the estimated travel time of the optimal route, determine the estimated travel time t of the emergency vehicle through the corresponding road section to be intervened on the optimal route pre ; The estimated travel time t pre and the actual travel time t act Substitute the actual congestion intervention efficiency formula into Calculate in to obtain the actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route; The actual congestion intervention efficiency α of the corresponding section to be intervened in the optimal route and the information set of the section congestion influencing factors are used as the traffic congestion information data of the section to be intervened, the traffic congestion information data of the section to be intervened is saved in a database, and the traffic congestion information data of the section to be intervened is used to iteratively optimize and train the congestion intervention efficiency prediction model.

9. A system for improving the traffic efficiency of emergency vehicles, characterized in that: It includes an information acquisition unit, a route determination unit, a route splitting unit, an intervention determination unit, a duration estimation unit, a route selection unit and a dispatching command unit, among which: An information acquisition unit, used to acquire an emergency task request for an emergency vehicle, and acquire emergency task information of the emergency vehicle in real time after acquiring the emergency task request, wherein the emergency task information includes the vehicle's current position information and destination position information; A route determination unit, used to determine a number of alternative routes for the emergency vehicle to reach the destination from the current position at the moment and the estimated travel time corresponding to each alternative route according to the vehicle's current position information and the destination position information; A route splitting unit is used to split each alternative route into corresponding multiple sections, and determine the real-time traffic information and on-duty traffic police information of each section in each alternative route; An intervention determination unit, used to determine the road section to be intervened in each alternative route according to the real-time traffic information of each road section in each alternative route, and determine the intervention impact time of each road section to be intervened in each alternative route according to the real-time traffic information of each road section to be intervened in each alternative route and the on-duty traffic police information; A duration estimation unit, used to determine the estimated time result of the traffic police intervention for each alternative route based on the estimated travel time of each alternative route and the impact time of each section to be intervened in each alternative route; A route selection unit, configured to select a route with the least traffic police intervention estimated time result from among the alternative routes according to the traffic police intervention estimated time results of the alternative routes as the best route; The dispatching and commanding unit is used to send the best route to the emergency vehicle, generate an emergency mission road intervention support message, and send the emergency mission road intervention support message to the on-duty traffic police corresponding to each section to be intervened in the best route.

10. A system for improving the traffic efficiency of emergency vehicles, characterized in that: include: A memory for storing instructions; A processor is used to read the instructions stored in the memory and execute the method for improving the traffic efficiency of emergency vehicles according to any one of claims 1 to 8 according to the instructions.

Images