Vehicle speed limit value calculation method and device based on multi-factor coupling, electronic equipment and readable storage medium

Abstract

The application provides a vehicle speed limit value calculation method based on multi-factor coupling, comprising the following steps: acquiring a reference speed limit value v n ; determining a vehicle speed correction coefficient f according to the road surface slope, the road alignment, the traffic flow and the visibility; and calculating a vehicle speed limit value v according to the reference speed limit value v n and the vehicle speed correction coefficient f. The reference speed limit value is dynamically corrected by combining the road surface slope, the road alignment, the traffic flow and the visibility, so that the speed limit value can be timely adjusted to avoid potential dangers caused by fixed speed limits; and the corrected speed limit value is more in line with actual road conditions, so that traffic congestion and accident rates can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of traffic control of road vehicles, and in particular to a vehicle speed limit value calculation method and device based on multi-factor coupling, an electronic equipment and a readable storage medium. BACKGROUND

[0002] Existing speed limit methods mainly rely on fixed speed limit values, which are usually set based on map data or legal speed. However, this method cannot effectively respond to dynamic changes in road conditions, such as weather conditions, traffic flow, and visibility. For example, in foggy or rainy weather, visibility is significantly reduced, and if the fixed speed is still driven, it will greatly increase the risk of traffic accidents. In addition, the traditional method often ignores the influence of real-time traffic flow state on safety.

[0003] Therefore, in order to solve the above technical problems, it is necessary to put forward a new technical means. SUMMARY

[0004] Therefore, in order to solve the above technical problems, it is necessary to put forward a new technical means.

[0005] The present application provides a vehicle speed limit value calculation method based on multi-factor coupling, which comprises:

[0006] obtaining a reference speed limit value v n ;

[0007] obtaining road slope, road alignment, traffic flow and visibility, and determining a vehicle speed correction coefficient f according to the road slope, the road alignment, the traffic flow and the visibility;

[0008] The vehicle speed correction coefficient f is calculated by the following formula:

[0009] f=Πf j

[0010] Wherein, f j represents the correction coefficient, j=1, 2, 3, 4, f1 represents the correction coefficient determined according to the road slope, f2 represents the correction coefficient determined according to the road alignment, f3 represents the correction coefficient determined according to the traffic flow, and f4 represents the correction coefficient determined according to the visibility;

[0011] According to the reference speed limit value v n and the vehicle speed correction coefficient f, the vehicle speed limit value v is calculated, and the calculation formula is as follows:

[0012] v=v n ×f.

[0013] Further, the correction coefficient f1 is calculated by the following formula:

[0014]

[0015] wherein a represents the slope, v n represents the reference speed limit value.

[0016] Further, the correction coefficient f2 is calculated by the following formula:

[0017]

[0018] wherein R h represents the horizontal curve radius, represents the lateral adhesion coefficient of the road, a h represents the super-elevation, a v represents the vertical centrifugal acceleration, R v represents the vertical curve radius.

[0019] Further, the correction coefficient f3 is calculated by the following formula:

[0020]

[0021] wherein v n represents the reference speed limit value, Q h represents the hourly traffic volume.

[0022] Further, the correction coefficient f4 is calculated by the following formula:

[0023]

[0024] wherein v n represents the reference speed limit value, b represents the braking deceleration, L n represents the visibility of the road section.

[0025] Further, the braking deceleration b is calculated by the following formula:

[0026]

[0027] wherein e represents the road surface adhesion coefficient, i represents the road longitudinal slope.

[0028] Correspondingly, the application further provides a vehicle speed limit value calculation device based on multi-factor coupling, comprising:

[0029] a data acquisition module, configured to acquire the reference speed limit value, the road surface slope, the road alignment, the traffic volume and the visibility of the road;

[0030] The first processing module is configured to calculate a vehicle speed correction coefficient according to the road surface slope, the road alignment, the traffic flow and the visibility based on the multi-factor coupling based vehicle speed limit value calculation method.

[0031] The second processing module is configured to calculate a vehicle speed limit value according to the reference speed limit value of the road and the vehicle speed correction coefficient based on the multi-factor coupling based vehicle speed limit value calculation method.

[0032] Correspondingly, the present application further provides an electronic device, comprising:

[0033] A memory and a processor, wherein the memory is configured to store a computer program, and the computer program is configured to be executed by the processor to implement the multi-factor coupling based vehicle speed limit value calculation method.

[0034] Correspondingly, the present application further provides a readable storage medium, wherein the readable storage medium stores computer instructions, and the computer instructions are configured to be executed by a processor to implement the multi-factor coupling based vehicle speed limit value calculation method.

[0035] The present application has the following advantages: the present application dynamically corrects the reference speed limit value by comprehensively considering the road surface slope, the road alignment, the traffic flow and the visibility, so that the speed limit value can be adjusted in time to avoid potential dangers caused by fixed speed limit; and the corrected speed limit value is more in line with actual road conditions, so that traffic congestion and accident rate can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] The present application will be further described below in combination with the drawings and embodiments:

[0037] Figure 1 The present application is a flowchart.

[0038] Figure 2 The present application is a device structure schematic diagram. DETAILED DESCRIPTION

[0039] The present application will be further described below in combination with the drawings and embodiments:

[0040] The present application provides a multi-factor coupling based vehicle speed limit value calculation method, comprising:

[0041] obtaining a reference speed limit value v n ;

[0042] obtaining a road surface slope, a road alignment, a traffic flow and a visibility, and determining a vehicle speed correction coefficient f according to the road surface slope, the road alignment, the traffic flow and the visibility;

[0043] The vehicle speed correction coefficient f is calculated by the following formula:

[0044] f = Πf j

[0045] Wherein, f j represents the correction coefficient, j = 1, 2, 3, 4, f1 represents the correction coefficient determined according to the road slope, f2 represents the correction coefficient determined according to the road alignment, f3 represents the correction coefficient determined according to the traffic flow, and f4 represents the correction coefficient determined according to the visibility;

[0046] The vehicle speed limit value v is calculated according to the reference speed limit value v n and the vehicle speed correction coefficient f, and the calculation formula is as follows:

[0047] v = v n × f.

[0048] By the above method, the speed limit value can be dynamically adjusted according to the road slope, road alignment, traffic flow and visibility.

[0049] In this embodiment, the reference speed limit value v n is obtained; the reference speed limit value refers to the maximum allowable driving speed under the law, which depends on the performance of the car itself, and more depends on the geographical location of the road and the provisions of the road regulations. The maximum allowable driving speed of the car is also different under different road conditions.

[0050] In this embodiment, the road slope, road alignment, traffic flow and visibility are obtained, and the vehicle speed correction coefficient f is determined according to the road slope, road alignment, traffic flow and visibility;

[0051] The correction coefficient f1 is determined according to the road slope: when the car is running uphill and downhill, it not only receives the driving force provided by the engine, but also receives the action of air resistance and road resistance. The driving force and resistance received by the vehicle are different when the slope is different. In order to comprehensively consider the influence of the force of the car changed by the slope on the vehicle speed, the correction coefficient f1 is used to correct the reference speed limit value to obtain the speed limit value suitable for the current slope;

[0052] The correction coefficient f1 is calculated by the following formula:

[0053]

[0054] Wherein, a represents the slope, v n represents the reference speed limit value;

[0055] When a>0, it indicates that the road surface is uphill; when a=0, it indicates that the slope is 0; when a<0, it indicates that the road surface is downhill. The above method can correct the reference speed limit value according to different slopes, and can obtain a more reasonable speed limit value, thereby effectively preventing traffic accidents.

[0056] According to the road alignment, the correction coefficient f2 is determined: when the car is driving on a horizontal curve (the horizontal curve refers to the road alignment of the road surface), a lateral centrifugal force is generated, and if the speed is too fast, the car will slip and overturn. When the car is driving on a vertical curve (the same as the horizontal curve), a radial centrifugal force is generated, and if the speed is too fast, the vehicle is prone to roll over or even overturn, and the braking distance may also be prolonged. In order to ensure the safety of vehicle driving, it is necessary to correct the basic speed limit value according to the road alignment, that is, to determine the correction coefficient f2 according to the road alignment, and then to correct the reference speed limit value according to the correction coefficient f2; so that the corrected speed limit value is more suitable for the current road alignment;

[0057] The correction coefficient f2 is calculated by the following formula:

[0058]

[0059] Wherein, R h represents the radius of the horizontal curve, represents the lateral adhesion coefficient of the road, a h represents the super-elevation, a v represents the vertical centrifugal acceleration, R v represents the radius of the vertical curve;

[0060] The lateral adhesion coefficient of the road can be determined by existing equipment or method, and the specific determination method is not described here; in the case where it is not convenient to determine the lateral adhesion coefficient of the road, it is preferably 0.4;

[0061] The super-elevation refers to the one-way transverse slope on the cross section of the road section, which is set to be higher on the outside than on the inside, in order to offset the centrifugal force generated when the vehicle drives on the circular curve section, and to ensure the safety, stability, meet the design speed and economic, comfortable through the circular curve. The super-elevation is obtained by using existing equipment or method, and the specific obtaining method is not described here; in the case where it is not convenient to determine the super-elevation, it is preferably-0.0015;

[0062] The vertical centrifugal acceleration is obtained by using existing technology, and is not described here; in the case where it is not convenient to obtain the vertical centrifugal acceleration, it is preferably 0.63 m / s 2 According to the road alignment, the correction coefficient f2 is determined: when the car is driving on a horizontal curve (the horizontal curve refers to the road alignment of the road surface), a lateral centrifugal force is generated, and if the speed is too fast, the car will slip and overturn. When the car is driving on a vertical curve (the same as the horizontal curve), a radial centrifugal force is generated, and if the speed is too fast, the vehicle is prone to roll over or even overturn, and the braking distance may also be prolonged. In order to ensure the safety of vehicle driving, it is necessary to correct the basic speed limit value according to the road alignment, that is, to determine the correction coefficient f2 according to the road alignment, and then to correct the reference speed limit value according to the correction coefficient f2; so that the corrected speed limit value is more suitable for the current road alignment;

[0063] According to the traffic flow to determine the correction coefficient f3: on the road with heavy traffic, if not speed limit is easy to lead to speeding, thereby increasing the risk of traffic accidents; in order to reduce the occurrence of accidents, the need to amend the basic speed limit value according to the traffic flow; that is, according to the traffic flow to determine the correction coefficient f3, and then according to the correction coefficient f3 correction reference speed limit value;

[0064] The correction coefficient f3 is calculated by the following formula:

[0065]

[0066] Wherein, v n The reference speed limit value, Q h Indicates the hourly traffic. By traffic dynamically correct the basic speed limit value, can effectively reduce traffic congestion, improve traffic efficiency.

[0067] According to the visibility to determine the correction coefficient f4: in low visibility conditions, such as fog, rain, snow or strong wind and other adverse weather, the driver's vision will be seriously affected, difficult to find potential hazards in time; when a car in the process of driving on the road, if the distance from the other vehicles in front of too close or have enough to affect the safety of other speed factors of the car, the driver will take appropriate measures in response to the occurrence of this situation, the most direct way is to step on the brake, but in this process, the car will continue to slide forward because of inertia again for a distance, so as to ensure the safety of the car, it must be guaranteed that the car will not crash into the front vehicle or obstacle when the sliding ends; in order to avoid collision, the need to amend the basic speed limit value according to the visibility; that is, according to the visibility to determine the correction coefficient f4, and then according to the correction coefficient f4 correction reference speed limit value;

[0068] The correction coefficient f4 is calculated by the following formula:

[0069]

[0070]

[0071] Wherein, v n The reference speed limit value, b indicates the braking deceleration, L n Indicates the visibility of the road section, e indicates the road adhesion coefficient, i indicates the road longitudinal slope. By visibility correction basic speed limit value, can improve road safety, reduce the efficiency of the accident, but also can reduce the speed difference between different vehicles, so as to avoid the potential danger caused by the speed difference.

[0072] According to the correction coefficient f1, f2, f3 and f4 to determine the speed correction coefficient f, the calculation formula is as follows:

[0073] f=Πf j

[0074] wherein f j represents a correction coefficient, j=1, 2, 3, 4.

[0075] In the embodiment, the speed correction coefficient f is used to correct the reference speed limit value v n to obtain a speed limit value v.

[0076] The speed limit value v is calculated by the following formula:

[0077] v=v n ×f

[0078] wherein f represents a speed correction coefficient.

[0079] By substituting the speed correction coefficient which comprehensively considers the road slope, road alignment, traffic flow and visibility, the speed limit value which is suitable for the current road condition can be determined, and the driving safety of the vehicle can be more accurately ensured.

[0080] Correspondingly, the application further provides a speed limit value calculation device based on multi-factor coupling, comprising:

[0081] a data acquisition module, configured to acquire a reference speed limit value, a road slope, a road alignment, a traffic flow and a visibility of a road;

[0082] a first processing module, configured to calculate a speed correction coefficient based on the speed limit value calculation method based on multi-factor coupling according to the road slope, the road alignment, the traffic flow and the visibility;

[0083] a second processing module, configured to calculate a speed limit value based on the speed limit value calculation method based on multi-factor coupling according to the reference speed limit value of the road and the speed correction coefficient.

[0084] Correspondingly, the application further provides an electronic device, comprising:

[0085] a memory and a processor, wherein the memory is configured to store a computer program, and the computer program is configured to be executed by the processor to implement the speed limit value calculation method based on multi-factor coupling.

[0086] Correspondingly, the application further provides a readable storage medium, wherein the readable storage medium stores computer instructions, and the computer instructions are configured to be executed by a processor to implement the speed limit value calculation method based on multi-factor coupling.

[0087] In the above embodiments of the application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0088] Those skilled in the art will understand that implementing all or part of the processes in the above method embodiments can be accomplished by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink, DRAM (SLDRAM), RAMbus, direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for calculating a speed limit value based on multi-factor coupling, characterized in that: The method comprises: Acquiring a reference speed limit value v n ; acquiring a road surface slope, a road alignment, a traffic volume and a visibility, and determining a vehicle speed correction coefficient f according to the road surface slope, the road alignment, the traffic volume and the visibility; The vehicle speed correction coefficient f is calculated by the following formula: f = p f j wherein f j denotes a correction factor, j = 1, 2, 3, 4, fi denotes a correction factor determined according to the road slope, f2 denotes a correction factor determined according to the road alignment, f3 denotes a correction factor determined according to the traffic volume, and f4 denotes a correction factor determined according to the visibility; The correction coefficient f1 is calculated by the following formula: wherein a represents the slope, v n denotes the reference speed limit value; The correction coefficient f2 is calculated by the following formula: wherein R h represents the radius of the horizontal curve, represents the lateral adhesion coefficient of the road, a h represents the superelevation, a v represents the vertical centrifugal acceleration, R v represents the radius of the vertical curve; According to the reference speed limit value v n and the vehicle speed correction factor f, a vehicle speed limit value v is calculated, with the following formula: v = v n x f.

2. The method for calculating the vehicle speed limit value based on multi-factor coupling according to claim 1, characterized in that: The correction coefficient f3 is calculated by the following formula: wherein v n represents the reference speed limit value, Q h represents the hourly traffic volume.

3. The method for calculating a vehicle speed limit value based on a multi-factor coupling according to claim 1, characterized in that: The correction coefficient f4 is calculated by the following formula: where v n represents the reference speed limit value, b represents the braking deceleration, L n represents the visibility of the road segment.

4. The method of claim 3, wherein the method is based on a multi-factor coupling of vehicle speed limit values. The braking deceleration b is calculated by the following formula: Wherein e represents a road surface adhesion coefficient, and i represents a road longitudinal slope.

5. A vehicle speed limit value calculation device based on multi-factor coupling, characterized in that: The method comprises: a data acquisition module, configured to acquire a reference speed limit value of a road, a road surface slope, a road alignment, a traffic volume and a visibility; a first processing module, configured to calculate a vehicle speed correction coefficient according to the road surface slope, the road alignment, the traffic volume and the visibility based on the multi-factor coupling based vehicle speed limit value calculation method in any one of claims 1-4; a second processing module, configured to calculate a vehicle speed limit value according to the reference speed limit value of the road and the vehicle speed correction coefficient based on the multi-factor coupling based vehicle speed limit value calculation method in any one of claims 1-4.

6. An electronic device, comprising: The method comprises: a memory and a processor, wherein the memory is configured to store a computer program, and the computer program is executed by the processor to implement the multi-factor coupling based vehicle speed limit value calculation method in any one of claims 1-4.

7. A readable storage medium characterized by: The readable storage medium stores computer instructions, and the computer instructions are executed by the processor to implement the multi-factor coupling based vehicle speed limit value calculation method in any one of claims 1-4.

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