A method and system for improving the traffic efficiency of emergency vehicles

Abstract

The present invention belongs to the field of traffic management technology, and specifically discloses a method and system for improving the traffic efficiency of emergency vehicles. The method includes planning emergency vehicle routes, predicting the traffic intervention efficiency of congested sections of the emergency route based on a congestion intervention efficiency prediction model, calculating the expected time benefit of each section based on the traffic intervention efficiency prediction value, and then determining the optimal route and intervening traffic police. The intervening traffic police are dispatched based on the optimal route to establish a traffic police-first aid linkage mode. The present invention can comprehensively consider the expected time benefit under the intervention of on-duty traffic police, determine the optimal driving route, and dispatch on-duty traffic police according to the optimal route. At the same time, it can perform dynamic adjustments based on real-time road condition information, which helps to improve the traffic efficiency of emergency vehicles, reduce the time it takes for ambulances to transport patients, and improve the efficiency of first aid treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of traffic management, and in particular relates to a method and system for improving the traffic 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 efficient passage 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, wherein:

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

[0005] CN114283594A discloses a dynamically adjusted special vehicle route optimization method. This method facilitates the passage of emergency vehicles by dynamically adjusting traffic lights along their routes. However, its drawbacks include: 1. Traffic conditions change in real time, and once the route is planned, this solution does not dynamically adjust the route based on actual conditions, making it difficult to cope with sudden traffic congestion along the original route; 2. In the event of a road blockage caused by a traffic accident or other reason, adjusting traffic lights does not resolve the congestion; and 3. The method is costly. This solution uses cameras to capture video footage to detect the number of vehicles on the road and license plates in real time, resulting in high equipment and computing power costs.

[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 the 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 location information;

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

[0013] S4. Determine the sections of each alternative route to be intervened according to 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 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 for each alternative route and the impact time of each section of the alternative route to be intervened;

[0015] S6. Select the one with the shortest estimated time for traffic police intervention from among the alternative routes based on the estimated time for traffic police intervention for each alternative route as the optimal route;

[0016] S7. Send the optimal 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 road section to be intervened in the optimal 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 traffic police intervention corresponding to the updated optimal route is determined;

[0019] 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. 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.

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

[0021] Determine the number of alternative routes to be m, each of which 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 one possible design, 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 the average traffic speed v, and the on-duty traffic police information includes the location 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.

[0024] In one possible design, determining the road section to be intervened in each alternative route based on 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(v0) - ln(v) to calculate the congestion degree d of each section, where v0 is a preset speed constant;

[0026] The sections of the alternative route with a congestion degree d greater than the set congestion degree threshold d0 are regarded as sections to be intervened in the alternative route, and the remaining sections are regarded as non-intervention sections in the alternative route.

[0027] In one possible design, determining the duration of intervention for each section to be intervened in each alternative route based on the real-time traffic condition information and on-duty traffic police information of each section to be intervened in each alternative route includes:

[0028] Determine the time t1 for the emergency vehicle to enter the corresponding section of the alternative route to be intervened from the current position of the emergency vehicle based on the estimated travel time corresponding to the alternative route, and the time t2 for the emergency vehicle to exit the corresponding section of the alternative route to be intervened from the current position of the emergency vehicle;

[0029] Substitute the time t1 from the current position of the emergency vehicle to the time it enters the corresponding road section to be intervened, the time t2 from the current position of the emergency vehicle to the time it exits the corresponding road section to be intervened, and the shortest time t3 for the on-duty traffic police to arrive at the corresponding road section to be intervened into the calculation formula for the impact time to be intervened, and calculate the impact time t of the corresponding road section to be intervened in the alternative route. The calculation formula for the impact time to be intervened is:

[0030]

[0031] In one possible design, the estimated time required for 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 on each alternative route, including:

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

[0033] Substitute the normalized vector x of the congestion influencing factors corresponding to the road section to be intervened into the congestion intervention efficiency prediction model y=ω for the road 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, b is the intercept vector corresponding to the road section to be intervened;

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

[0035] The congestion level 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 m alternative routes are used to form an m×n dimensional matrix A;

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

[0039] Use the vectors τ of m alternative routes 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 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 the traffic police intervention estimated time result vector r, where E is an m×n matrix with all elements set to 1, I is an m×n matrix with all diagonal elements set to 1 and all other elements set to 0, and λ is a column vector with all elements set to 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 expected travel time of the optimal route, the expected travel time t of the emergency vehicle through the corresponding road section to be intervened is determined pre ;

[0045] The estimated travel time t pre and actual travel time t act Substitute into the actual congestion intervention efficiency formula Calculate in and obtain the actual congestion intervention efficiency α of the corresponding road 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 are saved in the database, and the traffic congestion information data of the section to be intervened are used to iteratively optimize and train its congestion intervention efficiency prediction model.

[0047] In a second aspect, a system for improving the traffic efficiency of emergency vehicles is provided, comprising 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 and commanding unit, wherein:

[0048] An information acquisition unit is 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, configured to determine, based on the vehicle's current position information and the destination position information, 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;

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

[0051] an intervention determination unit, configured to determine the road section to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route, and to determine the duration of intervention for each road section to be intervened in each alternative route based on the real-time traffic condition information of each road section to be intervened in each alternative route and information about on-duty traffic police;

[0052] A duration estimation unit is used to 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;

[0053] a route selection unit, configured to select, from among the alternative routes, the one with the shortest estimated time for traffic police intervention as the best route based on the estimated time for traffic police intervention of the alternative routes;

[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 the computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform any one of the methods described in the first aspect. Furthermore, a computer program product is provided that, when executed on a computer, performs any one of the methods described in the first aspect.

[0059] Beneficial effects: By constructing a traffic police-emergency linkage mode, the present invention 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 road conditions information, which helps to improve the traffic efficiency of emergency vehicles, reduce the time it takes for ambulances to transport patients, and improve the efficiency of first aid 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0061] Figure 1 Schematic diagram of the steps of the method in Example 1 of the present invention;

[0062] Figure 2 Schematic diagram of the system structure in Example 2 of the present invention;

[0063] Figure 3 This is a 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 structural and functional details disclosed herein are merely intended to describe exemplary embodiments of the present invention. However, the present invention may be embodied in a variety 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 expressly specified or limited, the corresponding terms should be understood in a broad sense. For example, "connection" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to an electrical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the embodiments based on specific circumstances.

[0066] In the following description, certain details are provided to facilitate a thorough understanding of the example embodiments. However, one skilled in the art will appreciate that the example embodiments may be practiced without these specific details. For example, devices may be shown in block diagrams to avoid obscuring the examples with unnecessary detail. In other embodiments, well-known processes, structures, and techniques may be shown without unnecessary detail to avoid obscuring the embodiments.

[0067] Example 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 includes the following steps:

[0069] S1. Obtain an emergency mission request for an emergency vehicle, and after obtaining the emergency mission request, obtain emergency mission information of the emergency vehicle in real time, wherein the emergency mission 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 starts 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 location and the estimated travel time for each alternative route based on the vehicle's current location information and the destination location information.

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

[0073] S3. Split each alternative route into corresponding multiple 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 a specific implementation, each alternative route includes corresponding road segment division information. The system can split each alternative route into multiple sections based on the road segment division information. The maximum number of sections split from each alternative route is n, and the sections of each alternative route are arranged in order. Then, real-time traffic condition information and on-duty traffic police information are determined for each section of each alternative route. The real-time traffic condition information can be derived from the system's road information monitoring center, including a section congestion status information set and a section congestion influencing factor information set. The section congestion status information set may include the road status of the section and whether it is congested. The section 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 the congestion period, and rainfall during the congestion period. 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 section and the shortest time t3 for the on-duty traffic police to reach the section.

[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 duration of intervention for 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 practice, the system can substitute the average speed v of each section of the alternative route into the congestion level formula d = ln(v0) - ln(v) to calculate the congestion level d for each section, where v0 is a preset speed constant. Sections of the alternative route with a congestion level d greater than a set congestion level threshold d0 are then designated as sections to be intervened on the alternative route, while the remaining sections are designated as non-intervention sections.

[0077] Then, based on the estimated travel time corresponding to the alternative route, the time t1 for the emergency vehicle to enter the corresponding section to be intervened in the alternative route, and the time t2 for the emergency vehicle to exit the corresponding section to be intervened in the alternative route can be determined. Substitute the time t1 for the emergency vehicle to enter the corresponding section to be intervened from the current position, the time t2 for the emergency vehicle to exit the corresponding section to be intervened from the current position, and the shortest time t3 for the on-duty traffic police to arrive at the section to be intervened into the calculation formula for the impact time to be intervened, and calculate the impact time t for the corresponding section to be intervened in the alternative route. The calculation formula for the impact time to be intervened is:

[0078]

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

[0080] In specific implementation, the system can use the information set of congestion influencing factors of the corresponding section to be intervened in the alternative route to form a normalized vector x of congestion influencing factors of the corresponding section to be intervened; substitute the normalized vector x of 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 road section to be intervened; the congestion intervention efficiency of the non-intervention road section in the alternative route is set to 0, and the congestion intervention efficiency prediction value y of each road section to be intervened in the alternative route and the congestion intervention efficiency of each non-intervention road section are used to form a vector a. If the number of road sections in the alternative route is less than n, the vector a is padded with 0 vectors to make its vector dimension n.

[0081] The congestion degree d of each road section in the alternative route can be 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; the result vector of the alternative route is calculated Where T represents vector transpose and ° 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 duration of intervention of the non-intervention sections in the alternative routes can be set to 0, and the duration of intervention of each section to be intervened t and the duration of intervention of each non-intervention section in the alternative routes are used to form a vector τ. If the number of sections in the alternative routes is less than n, the vector τ is padded with 0 vectors to make its vector dimension n; the vectors τ of m alternative routes are 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 vector formula of the estimated time result of traffic police intervention. Calculations are performed to obtain the traffic police intervention estimated time vector r, where E represents an m×n matrix with all elements set to 1, I represents an m×n matrix with all diagonal elements set to 1 and all other elements set to 0, and λ represents a column vector of all elements set to 1 and dimension m. Each element in the traffic police intervention estimated time vector r corresponds to the estimated time for traffic police intervention for each alternative route.

[0084] S6. Based on the estimated time required for traffic police intervention for each alternative route, select the one with the shortest estimated time required for traffic police intervention from among the alternative routes as the optimal 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 optimal 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 road section to be intervened in the optimal route.

[0087] During specific implementation, the system sends the optimal route to the emergency vehicle so that the emergency vehicle can travel according to the optimal 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 optimal route, so that the on-duty traffic police corresponding to each section to be intervened in the optimal 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 intervention section of 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 based on the expected travel time of the optimal route, the expected travel time t of the emergency vehicle through the corresponding road section to be intervened of the optimal route is determined pre ; Then the estimated travel time t pre and actual travel time t act Substitute into the actual congestion intervention efficiency formula , and 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, and the traffic congestion information data of the section to be intervened are saved in a database, and the traffic congestion information data of the section to be intervened are used to iteratively optimize and train its congestion intervention efficiency prediction model.

[0089] In addition, while 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' for traffic police intervention corresponding to the updated optimal route. 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. 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.

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

[0091] Example 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 is 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, configured to determine, based on the vehicle's current position information and the destination position information, 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;

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

[0096] an intervention determination unit, configured to determine the road section to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route, and to determine the duration of intervention for each road section to be intervened in each alternative route based on the real-time traffic condition information of each road section to be intervened in each alternative route and information about on-duty traffic police;

[0097] A duration estimation unit is used to 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;

[0098] a route selection unit, configured to select, from among the alternative routes, the one with the shortest estimated time for traffic police intervention as the best route based on the estimated time for traffic police intervention of the alternative routes;

[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] Example 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 configured 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, memory, and data interface can be interconnected. 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-in-first-out memory (FIFO) and / or first-in-last-out memory (FILO), 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, or discrete hardware components.

[0107] Example 4:

[0108] This embodiment provides a computer-readable storage medium having instructions stored thereon. When the instructions are executed on a computer, the computer is caused to execute the method for improving the traffic efficiency of emergency vehicles in Example 1. The computer-readable storage medium refers to a medium for storing data, and 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. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device.

[0109] This embodiment further 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 scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection 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 the 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 location information; S3. Splitting each alternative route into a corresponding plurality of road sections, and determining real-time traffic condition information and on-duty traffic police information for each road section in each alternative route, wherein splitting each alternative route into the corresponding plurality of road sections comprises: determining a number of alternative routes as m, each alternative route including corresponding road section division information, splitting each alternative route into a plurality of road sections based on the road section division information of each alternative route, wherein a maximum number of road sections from each alternative route is n, and arranging the road sections of each alternative route in a sequential order; the real-time traffic condition information comprises 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 comprises an average traffic speed v; the on-duty traffic police information comprises a location of an on-duty traffic police corresponding to the road section and a shortest time t3 for the on-duty traffic police to arrive at the road section; S4. Determine the road sections to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route, and determine the impact time of each road section to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route and the information of on-duty traffic police; the said determining the road sections to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route comprises: substituting the average traffic speed v of each road section in the alternative route into the congestion degree formula d=ln(v0)-ln(v) for calculation to obtain the congestion degree d of each road section, wherein v0 is a preset speed constant; the road sections in the alternative route with a congestion degree d greater than the set congestion degree threshold d0 are regarded as the road sections to be intervened in the alternative route, and the remaining road sections are regarded as non-intervention sections in the alternative route; the said determining the road sections to be intervened in each alternative route based on the real-time traffic condition information of each road section in each alternative route comprises: substituting the average traffic speed v of each road section in the alternative route into the congestion degree formula d=ln(v0)-ln(v) for calculation to obtain the congestion degree d of each road section, wherein v0 is a preset speed constant; the road sections in the alternative route with a congestion degree d greater than the set congestion degree threshold d0 are regarded as the road sections to be intervened in the alternative route, and the remaining road sections are regarded as non-intervention sections in the alternative route; The real-time traffic condition information of each section to be intervened and the information of the on-duty traffic police determine the duration of intervention of each section to be intervened in each alternative route, including: determining the duration t1 of the emergency vehicle from the current position to the entry into the corresponding section to be intervened in the alternative route, and the duration t2 of the emergency vehicle from the current position to the exit from the corresponding section to be intervened in the alternative route based on the estimated travel time corresponding to the alternative route; substituting the duration t1 of the emergency vehicle from the current position to the entry into the corresponding section to be intervened, the duration t2 of the emergency vehicle from the current position to the exit from the corresponding section to be intervened, and the shortest duration t3 of the on-duty traffic police of the corresponding section to be intervened to the section to be intervened into the calculation formula for duration of intervention, and obtaining the duration t of intervention of the corresponding section to be intervened in the alternative route. The calculation formula for duration of intervention is: S5. Determine the estimated time required for traffic police intervention for each alternative route based on the estimated travel time for each alternative route and the impact time of each section of the route to be intervened, including: Using the information set of the congestion influencing factors of the corresponding road section to be intervened in the alternative route, a normalized vector x of the congestion influencing factors of the corresponding road section to be intervened is formed; Substitute the normalized vector x of the congestion influencing factors corresponding to the road section to be intervened into the congestion intervention efficiency prediction model y=ω for the road 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, b is the intercept vector corresponding to the road section to be intervened; Set the congestion intervention efficiency of the non-intervention road segments in the alternative route to 0, and use the congestion intervention efficiency prediction value y of each intervention road segment in the alternative route and the congestion intervention efficiency of each non-intervention road segment to form a vector a. If the number of road segments in the alternative route is less than n, fill the vector a with 0 vectors to make its vector dimension n; The congestion level 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 m alternative routes are used to form an m×n dimensional matrix A; Set the intervention impact time of the non-intervention sections in the alternative route to 0, and use the intervention impact time t of each intervention section in the alternative route and the intervention impact time of each non-intervention section to form a vector τ. If the number of sections in the alternative route is less than n, fill the vector τ with 0 vectors to make its vector dimension n; Use the vectors τ of m alternative routes 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 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 the traffic police intervention estimated time result vector r, where E is an m×n matrix with all elements set to 1, I is an m×n matrix with all diagonal elements set to 1 and all other elements set to 0, and λ is a column vector with all elements set to 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; S6. Select the one with the shortest estimated time for traffic police intervention from among the alternative routes based on the estimated time for traffic police intervention for each alternative route as the optimal route; S7. Send the optimal 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 road section to be intervened in the optimal 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, repeat steps S2-S6 to obtain the updated best route, and determine the estimated time result T of traffic police intervention corresponding to the updated best route. ' ; like and / or T0-T ' >ΔT, where T0 is the estimated time required for traffic police intervention corresponding to the best route before the update, θ is the set ratio threshold, and ΔT is the set difference threshold. If the emergency vehicle is determined to need to change its route, the updated best route is sent to the emergency vehicle, and an 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. A cancellation notice is also sent to the on-duty traffic police corresponding to each section to be intervened in the best route before the update. Otherwise, the emergency vehicle is determined not to need to change its route.

3. The method for improving the traffic efficiency of emergency vehicles according to claim 1, 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 expected travel time of the optimal route, the expected travel time t of the emergency vehicle through the corresponding road section to be intervened is determined pre ; The estimated travel time t pre and actual travel time t act Substitute into the actual congestion intervention efficiency formula Calculate in and obtain the actual congestion intervention efficiency α of the corresponding road 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 are saved in the database, and the traffic congestion information data of the section to be intervened are used to iteratively optimize and train its congestion intervention efficiency prediction model.

4. A system for improving the traffic efficiency of emergency vehicles, characterized in that: It includes information acquisition unit, route determination unit, route splitting unit, intervention determination unit, duration estimation unit, route selection unit and dispatching command unit, among which: An information acquisition unit is 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, configured to determine, based on the vehicle's current position information and the destination position information, 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; a route splitting unit, configured to split each alternative route into a corresponding plurality of road sections, and determine real-time traffic condition information and on-duty traffic police information for each road section in each alternative route, wherein splitting each alternative route into the corresponding plurality of road sections comprises: determining a number of alternative routes as m, each alternative route including corresponding road section division information, splitting each alternative route into a plurality of road sections according to the road section division information of each alternative route, wherein a maximum number of road sections split from each alternative route is n, and arranging the road sections of each alternative route in a sequential order; the real-time traffic condition information comprises 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 comprises an average traffic speed v, and the on-duty traffic police information comprises a location of an on-duty traffic police corresponding to the road section and a shortest time t3 for the on-duty traffic police to arrive at the road section; An intervention determination unit is configured to determine the road sections to be intervened in each alternative route according to the real-time traffic condition information of each road section in each alternative route, and determine the impact time of each road section to be intervened in each alternative route according to the real-time traffic condition information of each road section in each alternative route and the information of on-duty traffic police; the determination of the road sections to be intervened in each alternative route according to the real-time traffic condition information of each road section in each alternative route comprises: substituting the average traffic speed v of each road section in the alternative route into the congestion degree formula d=ln(v0)-ln(v) for calculation to obtain the congestion degree d of each road section, wherein v0 is a preset speed constant; the road sections in the alternative route whose congestion degree d is greater than the set congestion degree threshold d0 are regarded as the road sections to be intervened in the alternative route, and the remaining road sections are regarded as non-intervention sections in the alternative route; the determination of the road sections to be intervened in each alternative route according to the real-time traffic condition information of each road section in each alternative route comprises: substituting the average traffic speed v of each road section in the alternative route into the congestion degree formula d=ln(v0)-ln(v) for calculation to obtain the congestion degree d of each road section, wherein v0 is a preset speed constant; the road sections in the alternative route whose congestion degree d is greater than the set congestion degree threshold d0 are regarded as the road sections to be intervened in the alternative route, and the remaining road sections are regarded as non-intervention sections in the alternative route; The real-time traffic condition information of each section to be intervened in the route and the information of the on-duty traffic police determine the impact time of each section to be intervened in each alternative route, including: determining the time t1 of the emergency vehicle from the current position to the entry into the corresponding section to be intervened in the alternative route, and the time t2 of the emergency vehicle from the current position to the exit from the corresponding section to be intervened in the alternative route based on the expected travel time corresponding to the alternative route; substituting the time t1 of the emergency vehicle from the current position to the entry into the corresponding section to be intervened, the time t2 of the emergency vehicle from the current position to the exit from the corresponding section to be intervened, and the shortest time t3 of the on-duty traffic police of the corresponding section to be intervened to the section to be intervened into the calculation formula for the impact time to be intervened, and obtaining the impact time t of the corresponding section to be intervened in the alternative route. The calculation formula for the impact time to be intervened is: The duration estimation unit is used to 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, including: Using the information set of the congestion influencing factors of the corresponding road section to be intervened in the alternative route, a normalized vector x of the congestion influencing factors of the corresponding road section to be intervened is formed; Substitute the normalized vector x of the congestion influencing factors corresponding to the road section to be intervened into the congestion intervention efficiency prediction model y=ω for the road 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, b is the intercept vector corresponding to the road section to be intervened; Set the congestion intervention efficiency of the non-intervention road segments in the alternative route to 0, and use the congestion intervention efficiency prediction value y of each intervention road segment in the alternative route and the congestion intervention efficiency of each non-intervention road segment to form a vector a. If the number of road segments in the alternative route is less than n, fill the vector a with 0 vectors to make its vector dimension n; The congestion level 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 m alternative routes are used to form an m×n dimensional matrix A; Set the intervention impact time of the non-intervention sections in the alternative route to 0, and use the intervention impact time t of each intervention section in the alternative route and the intervention impact time of each non-intervention section to form a vector τ. If the number of sections in the alternative route is less than n, fill the vector τ with 0 vectors to make its vector dimension n; Use the vectors τ of m alternative routes 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 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 the traffic police intervention estimated time result vector r, where E is an m×n matrix with all elements set to 1, I is an m×n matrix with all diagonal elements set to 1 and all other elements set to 0, and λ is a column vector with all elements set to 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; a route selection unit, configured to select, from among the alternative routes, the one with the shortest estimated time for traffic police intervention as the best route based on the estimated time for traffic police intervention of the alternative routes; 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.

5. A system for improving the traffic efficiency of emergency vehicles, characterized in that: include: a memory for storing instructions; A processor is configured to read 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 3 according to the instructions.

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