CN114360246B - Early warning method and device for expressway exit ramp and storage medium - Google Patents
Early warning method and device for expressway exit ramp and storage medium Download PDFInfo
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- CN114360246B CN114360246B CN202111629974.2A CN202111629974A CN114360246B CN 114360246 B CN114360246 B CN 114360246B CN 202111629974 A CN202111629974 A CN 202111629974A CN 114360246 B CN114360246 B CN 114360246B
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Abstract
The application provides an early warning method and device for an exit ramp of a highway and a storage medium. The method comprises the following steps: acquiring real-time position information and a vehicle identifier of a target vehicle; acquiring a corresponding common exit ramp set according to the vehicle identification; wherein the common set of exit ramps includes common exit ramp points; judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information; and if so, early warning the target vehicle. According to the method and the device, on the basis that road network data are not used, when the common exit ramps intensively contain the target common exit ramp points within the preset distance from the real-time position information of the target vehicle, the vehicle is early warned in advance, a driver is prompted to prepare for exiting the ramps in time, the accuracy and the safety of the vehicle exiting the ramps are improved, and the time waste and the economic loss are reduced.
Description
Technical Field
The application relates to the technical field of intelligent traffic, in particular to an early warning method and device for an exit ramp of a highway and a storage medium.
Background
With the rapid development of the logistics industry, the logistics industry gradually pursues aging development from meeting transportation requirements, at present, a general truck safe operation platform company obtains data of an exit ramp by cooperating with a map manufacturer, which involves expensive cost, and the data of the exit ramp cannot guarantee real-time update.
Generally, trucks on highways, whether for rail or branch traffic, travel back and forth in almost repetitive paths. For a logistics truck, if a driver does not prepare for leaving a ramp in advance, the driver can miss an exit ramp and only can go back from the next ramp, so that time waste and economic loss are caused for the freight industry pursuing time efficiency, and the driver can bring greater potential safety hazard if forcibly leaving the ramp in an unsafe space range.
Disclosure of Invention
An object of an embodiment of the present application is to provide a method and an apparatus for early warning of an exit ramp of a highway, and a storage medium, so as to solve the problem in the prior art that a driver misses an exit ramp without preparing to exit the ramp in advance without using road network data, which causes time waste and economic loss.
In a first aspect, an embodiment of the present application provides an early warning method for an exit ramp of a highway, including:
acquiring real-time position information and a vehicle identifier of a target vehicle;
acquiring a corresponding common exit ramp set according to the vehicle identification; wherein the common exit ramp set includes common exit ramp points;
judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information;
and if so, early warning the target vehicle.
According to the method and the device, under the condition that the vehicle does not use road network data, the corresponding common exit ramp set is obtained through the vehicle identification, when the common exit ramp set contains the target common exit ramp points within the preset distance away from the real-time position information of the target vehicle, the vehicle is early warned in advance, a driver is prompted to prepare for exiting the ramp in time, the accuracy and the safety of the vehicle exiting the ramp are improved, and the time waste and the economic loss are reduced.
Further, the method further comprises:
acquiring a driving track of a historical vehicle; the driving track is a plurality of continuous track points corresponding to a preset travel of the historical vehicle;
intercepting the driving track according to a preset window and a preset step length to obtain a plurality of track sections; the number of track points included in each track segment is the size of the preset window;
determining whether the track segment contains an exit ramp point or not according to the road grade of the track point corresponding to each track segment;
and acquiring an exit ramp point corresponding to a track segment containing the exit ramp point, and generating the exit ramp set according to the acquired exit ramp point.
According to the method and the device, the off-line vehicle driving track data are analyzed, whether exit ramp points are contained in the track section or not is determined by judging the road grade of the track points corresponding to each track section, the vehicle exit ramp set is excavated, and the operation cost of obtaining the exit ramp points by a driver is reduced.
Further, the method further comprises:
acquiring the time and the times of the target vehicle passing each historical exit ramp point within a preset time period; wherein the historical off-ramp point is one of the set of off-ramps;
determining a correlation value between the target vehicle and the corresponding historical ramp-off point according to the time and the times of the target vehicle passing through each historical ramp-off point;
and determining a common exit ramp set corresponding to the target vehicle according to the correlation value of the historical exit ramp points.
According to the method and the device, the historical exit ramp points and the vehicles are associated, the correlation values of the target vehicles and the corresponding historical exit ramp points are determined according to the time and the times of the target vehicles passing through each historical exit ramp point, when the driving tracks of the vehicles change, the correlation values of the historical exit ramp points are updated in real time, and the accuracy and the real-time performance of the obtained common exit ramp set are guaranteed.
Furthermore, the road grade comprises an expressway and a non-expressway, and the track points in the track section are arranged according to the acquired time; determining whether the track segment contains an exit ramp point according to the road grade of the track point corresponding to each track segment, including:
if the road grades of the track points corresponding to the track segment are the same, the track segment does not contain the exit ramp point;
if the road grade of the track point that the orbit section corresponds is inequality, just the road grade is arranged for highway's track point the road grade is the front of non-highway's track point, just the road grade be highway's track point with when the quantity of road grade for non-highway's track point all satisfies first threshold value, then confirm contain export ramp point in the orbit section.
Whether this application embodiment contains the exit ramp point in confirming the orbit section through the road grade of the track point that judges every section orbit section and correspond, the road grade at the track point that the orbit section corresponds is inequality, and the road grade is highway's track point row is in the road grade is non-highway's the front of track point, the road grade be highway's track point with when the road grade all satisfies first threshold value for the quantity of the track point of non-highway, just confirm to contain the exit ramp point in the orbit section for the data of the exit ramp point that obtains are more accurate and true.
Further, the acquiring an exit ramp point corresponding to a track segment containing the exit ramp point includes:
obtaining track points of a highway at the road grade before track points of a non-highway at the road grade in a track section comprising exit ramp points to obtain a first track point set;
and determining the last track point of the first track point set as the exit ramp point.
According to the method and the device for identifying the exit ramp points, after the track section containing the exit ramp points is judged, the first track point set corresponding to the track point of the expressway at the road grade before the track point of the non-expressway at the road grade is obtained, the last track point of the first track point set is determined as the exit ramp point, and the exit ramp points are identified and determined.
Further, the acquiring an exit ramp point corresponding to a track segment containing the exit ramp point further includes:
if the driving tracks comprise a plurality of driving tracks, acquiring exit ramp points to be determined at the same position in each driving track;
acquiring the number of exit ramp points to be determined contained in a preset area range of each exit ramp point to be determined, and acquiring a first calculation result;
and determining the exit ramp point to be determined corresponding to the first calculation result with the maximum value as the exit ramp point.
According to the method and the device, the multiple driving tracks are analyzed, the exit ramp points to be determined at the same position in each driving track are obtained firstly, and then the exit ramp points to be determined corresponding to the preset area range containing the largest number of the exit ramp points to be determined are determined as the exit ramp points, so that the accuracy of identifying and determining the exit ramp points is improved.
Further, the determining whether the common exit ramp set includes a target common exit ramp point within a preset distance from the real-time location information includes:
and if the road grade corresponding to the real-time position information is an expressway, the distance between the real-time position information and the common exit ramp point meets a second preset threshold value, and the direction angle deviation between the real-time position information and the common exit ramp point meets a third threshold value range, determining that the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
According to the embodiment of the application, whether the common exit ramp set contains the target common exit ramp point within the preset distance from the real-time position information of the target vehicle is judged by analyzing the real-time position information of the vehicle, so that a driver can obtain the information of the target common exit ramp point corresponding to the front road section in real time.
Further, if the vehicle contains the early warning, the early warning is carried out on the target vehicle, and the method comprises the following steps:
and if the common exit ramp set contains target common exit ramp points within a preset distance from the real-time position information and the running speed of the target vehicle is greater than the preset running speed, early warning is carried out on the target vehicle.
The embodiment of the application judges that the common exit ramps intensively contain the common exit ramps of the target in the preset distance from the real-time position information corresponding to the target vehicle, judges the running speed of the target vehicle, triggers the early warning task only when the running speed of the target vehicle is greater than the preset running speed, avoids frequent reminding of a driver, enables the driver to be numb, and enables the experience of the driver to be better.
In a second aspect, an embodiment of the present application provides an early warning device for an exit ramp of a highway, including:
the information acquisition module is used for acquiring real-time position information and vehicle identification of the target vehicle;
the loop gather obtaining module is used for obtaining a corresponding common exit loop gather according to the vehicle identification; wherein the common exit ramp set includes common exit ramp points;
the judging module is used for judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information;
and the early warning module is used for early warning the target vehicle when the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
In a third aspect, an embodiment of the present application provides an electronic device, including: the system comprises a processor, a memory and a bus, wherein the processor and the memory are communicated with each other through the bus; the memory stores program instructions executable by the processor, the processor being capable of executing the method of the first aspect when invoked by the processor.
In a fourth aspect, embodiments of the present application provide a storage medium having a computer program stored thereon, where the computer program is executed by a processor to perform the method of the first aspect.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of an early warning method for an exit ramp of a highway provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a method for obtaining an exit ramp point according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an early warning device for an exit ramp of a highway provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Fig. 1 is a schematic flow chart of an early warning method for an exit ramp of a highway provided in an embodiment of the present application, and as shown in fig. 1, the method includes:
step 101: and acquiring real-time position information and vehicle identification of the target vehicle.
The target vehicle is a vehicle which is subjected to exit ramp set mining and common exit ramp set mining and uploads the corresponding exit ramp set and the common exit ramp set to a large data platform database; the vehicle identification may be the license plate number of the vehicle, a preset vehicle number, the identification of the driver, etc. The driver and the driver are not bound, and at the moment, when the driver uses the vehicle, the driver and the vehicle can be bound only by logging in the corresponding account and the password.
In the embodiment of the application, the target vehicle uploads the real-time position information of the target vehicle to the big data platform at a fixed frequency every 3 seconds in the driving process, and in a specific implementation process, a person skilled in the art can appropriately adjust the uploading frequency according to an actual situation, which is not specifically limited in the embodiment of the application.
Step 102: acquiring a corresponding common exit ramp set according to the vehicle identification; wherein the common set of off-ramps includes common off-ramp points.
The common exit ramp set is obtained by analyzing and mining the off-line driving track of the vehicle and establishing an association relationship between each obtained ramp point and the vehicle, and the large data platform can associate the target vehicle with the exit ramp set stored in the large data platform database and the corresponding common exit ramp set through a vehicle identifier.
Step 103: and judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
The preset distance is that the distance between the real-time position information of the target vehicle and a common exit ramp point is within the range of 2 KM; the target common exit ramp point is a common exit ramp point within a preset distance from the real-time position information of the target vehicle in the common exit ramp set.
Step 104: and if so, early warning the target vehicle.
In a specific implementation process, after the situation that the common exit ramps collectively contain the target common exit ramp points within the preset distance from the real-time position information of the target vehicle is judged, the big data platform issues an early warning task to the target vehicle, and the target vehicle executes a corresponding early warning command when receiving the big early warning task so as to remind a driver of preparing for lane changing and deceleration in advance in a broadcasting early warning mode. Wherein, broadcast the mode of early warning and include: and converting the issued early warning command into corresponding sound for playing or using the sound recorded in advance for playing.
On the basis of the above embodiment, the method further includes:
acquiring a driving track of a historical vehicle; the driving track is a plurality of continuous track points corresponding to a preset travel of the historical vehicle;
intercepting the driving track according to a preset window and a preset step length to obtain a plurality of track sections; the number of the track points in each track segment is the size of the preset window;
determining whether the track segment contains exit ramp points or not according to the road grade of the track point corresponding to each track segment;
and acquiring an exit ramp point corresponding to a track segment containing the exit ramp point, and generating the exit ramp set according to the acquired exit ramp point.
The driving track is offline track information of a historical vehicle, and the preset travel is a travel interval in which the vehicle runs within a preset time range.
In a specific implementation process, the big data platform plays back the track of the vehicle one day before, error data generated due to vehicle equipment failure or GPS drift and the like are filtered, a section of travel is constructed by the filtered track points according to the time when the vehicle starts to travel and finishes traveling, each section of travel is composed of a plurality of continuous track points, and the track points of each section of travel are filtered to remove interference points in the travel. In the embodiment of the present application, the preset time range is a previous day, and in a specific implementation process, a person skilled in the art may appropriately adjust the preset time range according to an actual situation, which is not specifically limited in the embodiment of the present application.
For example, the track point corresponding to the preset travel B of the vehicle a is a section of continuous n track points, the size of the preset window is set to m, and the preset step length is set to z, where > m. And intercepting the n track points according to the sizes of m and z to obtain corresponding multi-segment track points. When the track point corresponding to the stroke a is a section of continuous 100 track points, the size m of the preselection window is 10, and the preset step length is 5, the following can be obtained: 0-10, 1-11, 2-12, 3-13, etc., and so on, all trajectory segments in a 0-100 stroke can be obtained.
Judging the road grade corresponding to the track point of each track section, wherein the road grade comprises the following steps: and acquiring exit ramp points corresponding to the track sections containing the exit ramp points according to the judgment result for the expressway and the non-expressway, so as to realize excavation of the exit ramp set of the vehicle A.
On the basis of the above embodiment, the method further includes:
acquiring the time and the times of the target vehicle passing each historical exit ramp point within a preset time period; wherein the historical off-ramp point is one of the set of off-ramps;
determining a correlation value between the target vehicle and the corresponding historical ramp-off point according to the time and the times of the target vehicle passing through each historical ramp-off point;
and determining a common exit ramp set corresponding to the target vehicle according to the correlation value of the historical exit ramp points.
Wherein, the preset time period can be the previous day, the previous week, the previous month, the previous three months and the like.
In a specific implementation process, the previous week may be used as a preset time period, and according to the number of times and time that the target vehicle passes through each historical exit ramp point in the previous week, an association relationship is established between the target vehicle and the corresponding historical exit ramp point, and a correlation is given to each historical exit ramp point.
The correlation is positively correlated with the times that the target vehicle passes through the historical exit ramp point, and is positively correlated with the latest time that the target vehicle exits the historical exit ramp point. That is, the more times the target vehicle passes through the history exit ramp point, the closer the time the target vehicle passes through the history exit ramp point is to the current time, and the greater the possibility that the target vehicle passes through the history exit ramp point next time is considered to be.
The method comprises the steps of giving correlation to each historical exit ramp point, obtaining a correlation value of each historical exit ramp point, selecting the historical exit ramp point of which the correlation value is larger than a preset threshold value as a common exit ramp point corresponding to a target vehicle, and updating a common exit ramp set according to a certain time period. In a specific implementation process, a person skilled in the art may select a suitable preset threshold according to an actual situation, which is not specifically limited in the embodiment of the present application.
Because the correlation value obtained in the embodiment of the application is dynamically changed and is iterated continuously according to the trajectory of the target vehicle, when the trajectory of the target vehicle changes, the correlation value of the exit ramp point obtained according to the original trajectory is reduced, and the correlation value of the exit ramp point obtained according to the current trajectory is increased, so that a new common exit ramp set is formed.
On the basis of the embodiment, the road grade comprises an expressway and a non-expressway, and the track points in the track section are arranged according to the acquired time; determining whether the track segment contains an exit ramp point according to the road grade of the track point corresponding to each track segment, including:
if the road grades of the track points corresponding to the track segment are the same, the track segment does not contain the exit ramp point;
if the road grade of the track point that the orbit section corresponds is inequality, just the road grade is arranged for highway's track point the road grade is the front of non-highway's track point, just the road grade be highway's track point with when the quantity of road grade for non-highway's track point all satisfies first threshold value, then confirm contain export ramp point in the orbit section.
Wherein, the exit ramp point is a special crossing, including two characteristics: firstly, one direction of an exit ramp point is an expressway, and the other direction is a non-expressway; second, the exit ramp point is unidirectional. The first threshold is greater than or equal to 2. In a specific implementation process, a person skilled in the art may appropriately adjust the first threshold according to an actual situation, and this is not specifically limited in this embodiment of the present application.
In a specific implementation process, if all the track points corresponding to a section of track are on the highway or are on the non-highway, based on the two characteristics of the exit ramp points, it can be known that the section of track does not include the exit ramp points.
If the road grades of the corresponding track points of one track section are different, and the track points of the expressway with the road grade are arranged in front of the track points of the non-expressway with the road grade, the number of the track points of the expressway with the road grade is more than or equal to 2, and the number of the track points of the non-expressway with the road grade is more than or equal to 2, the track section of the section can be determined to contain the exit ramp points.
Fig. 2 is a schematic diagram of a method for obtaining an exit ramp point according to an embodiment of the present application, where as shown in fig. 2, A1, A2, A3, and A4 are track points of a road class of an expressway, A5, A6, A7, A8, and A9 are track points of a road class of an non-expressway, A1, A2, A3, and A4 are arranged in front of A5, A6, A7, A8, and A9, and both the number of track points of an expressway and the number of track points of a non-expressway are greater than 2, so that it can be determined that an exit ramp point is included in a track segment in fig. 2.
On the basis of the foregoing embodiment, the acquiring an off-ramp point corresponding to a track segment including the off-ramp point includes:
obtaining track points of a highway with the road grade before track points of a non-highway with the road grade in a track section containing exit ramp points to obtain a first track point set;
and determining the last track point of the first track point set as the exit ramp point.
The first track point set is a set formed by track points of which the road grade is an expressway before the track points of which the road grade is a non-expressway. As shown in fig. 2, the first track point set is A1, A2, A3, and A4, and then A4 is an exit ramp point corresponding to the track segment in fig. 2.
On the basis of the foregoing embodiment, the acquiring an off-ramp point corresponding to a track segment including the off-ramp point further includes:
if the driving tracks comprise a plurality of driving tracks, acquiring exit ramp points to be determined at the same position in each driving track;
acquiring the number of the exit ramp points to be determined contained in the preset area range of each exit ramp point to be determined, and acquiring a first calculation result;
and determining the exit ramp point to be determined corresponding to the first calculation result with the maximum value as the exit ramp point.
The preset area range is a circular area obtained by taking each exit ramp point to be determined as a circle center and taking the preset length as a radius.
In the implementation process, if the vehicle passes through the same exit ramp point for multiple times, multiple exit ramp points such as A4 shown in fig. 2 are generated, and each of the A4 ramp points is taken as an exit ramp point to be determined. Taking each exit ramp point to be determined as a circle center, taking 50 meters as a radius, calculating the number of exit ramp points to be determined contained in a circle corresponding to each exit ramp point to be determined, and selecting the circle center corresponding to the circle containing the exit ramp point to be determined with the largest number as the finally determined exit ramp point.
On the basis of the foregoing embodiment, the determining whether the common exit ramp set includes a target common exit ramp point within a preset distance from the real-time position information includes:
and if the road grade corresponding to the real-time position information is an expressway, the distance between the real-time position information and the common exit ramp point meets a second preset threshold value, and the direction angle deviation between the real-time position information and the common exit ramp point meets a third threshold value range, determining that the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
The second preset threshold is 2KM, and the third preset threshold is 120 degrees. In a specific implementation process, a person skilled in the art may appropriately adjust the second preset threshold and the third preset threshold according to an actual situation, which is not specifically limited in this embodiment of the application. In the specific implementation process, the target vehicle uploads the real-time position information of the target vehicle to the big data platform at a fixed frequency every 3 seconds in the driving process. The big data platform judges the driving road of the vehicle according to the real-time position information of the vehicle, and if the target vehicle drives on a non-expressway, early warning of the target vehicle is not involved. And if the target vehicle runs on the expressway, further judging whether a target common exit ramp point exists within the range of 2KM of the target vehicle.
And if the distance between the real-time position information of the target vehicle and the common exit ramp point is within the range of 2KM and the direction angle deviation between the real-time position information of the target vehicle and the common exit ramp point is within the range of 120 degrees, judging whether the common exit ramp set contains the target common exit ramp point within the preset distance from the real-time position information of the target vehicle.
On the basis of the above embodiment, if the target vehicle is contained, the early warning of the target vehicle includes:
and if the common exit ramp set contains target common exit ramp points within a preset distance from the real-time position information and the running speed of the target vehicle is greater than the preset running speed, early warning is carried out on the target vehicle.
In a specific implementation process, after determining that the common exit ramp set includes a target common exit ramp point within a preset distance from the real-time position information of the target vehicle, first determining whether the running speed of the target vehicle is greater than a preset running speed, and in the embodiment of the present application, setting the preset running speed to 65KM/h. Namely, when the running speed of the target vehicle is less than 65KM/h, the large data platform considers that the driver has prepared for decelerating and changing lanes in advance, and the early warning of the target vehicle is not repeated. And when the running speed of the target vehicle is greater than 65KM/h, issuing an early warning task to the target vehicle. In a specific implementation process, the preset running speed is 65KM/h, and in a specific embodiment, a person skilled in the art may appropriately adjust the preset running speed according to an actual situation, which is not specifically limited in the embodiment of the present application. Firstly, the big data platform inquires whether a driver corresponding to a target vehicle carries out personalized configuration on the early warning prompt of the vehicle, and if the driver carries out personalized configuration on the early warning prompt of the vehicle, the driver can be reminded of the client by directly using the early warning prompt of the personalized configuration of the driver. If the driver does not configure the early warning prompt in advance, after the target vehicle receives the task in the early warning, the issued early warning command is converted into corresponding sound or the driver is broadcasted and reminded by using the sound recorded in advance.
Fig. 3 is a schematic structural diagram of an early warning apparatus 200 for an exit ramp of a highway, which may be a module, a program segment, or a code on an electronic device according to an embodiment of the present application. It should be understood that the apparatus corresponds to the above-mentioned embodiment of the method of fig. 1, and can perform various steps related to the embodiment of the method of fig. 1, and the specific functions of the apparatus can be referred to the description above, and the detailed description is appropriately omitted here to avoid redundancy. The device includes: the system comprises an information acquisition module 201, a ramp set acquisition module 202, a judgment module 203 and an early warning module 204, wherein:
the information acquisition module 201 is used for acquiring real-time position information and a vehicle identifier of a target vehicle;
the ramp set acquisition module 202 is configured to acquire a corresponding common exit ramp set according to the vehicle identifier; wherein the common set of exit ramps includes common exit ramp points;
the judging module 203 is configured to judge whether the common exit ramp set includes a target common exit ramp point within a preset distance from the real-time position information;
and the early warning module 204 is configured to perform early warning on the target vehicle when the common exit ramp set includes a target common exit ramp point within a preset distance from the real-time position information.
On the basis of the above embodiment, the apparatus further includes an exit-circle gather obtaining module configured to:
acquiring a driving track of a historical vehicle; the driving track is a plurality of continuous track points corresponding to the historical vehicle in a preset travel;
intercepting the driving track according to a preset window and a preset step length to obtain a plurality of track sections; the number of the track points in each track segment is the size of the preset window;
determining whether the track segment contains an exit ramp point or not according to the road grade of the track point corresponding to each track segment;
and acquiring an exit ramp point corresponding to a track segment containing the exit ramp point, and generating the exit ramp set according to the acquired exit ramp point.
On the basis of the above embodiment, the apparatus further includes a common exit ramp set acquisition module, configured to:
acquiring the time and the times of the target vehicle passing each historical exit ramp point within a preset time period; wherein the historical off-ramp point is one of the set of off-ramps;
determining a correlation value between the target vehicle and the corresponding historical exit ramp point according to the time and the times of the target vehicle passing through each historical exit ramp point;
and determining a common exit ramp set corresponding to the target vehicle according to the correlation value of the historical exit ramp points.
On the basis of the above embodiment, the exit ramp set acquisition module is specifically configured to:
if the road grades of the track points corresponding to the track segment are the same, the track segment does not contain the exit ramp point;
if the road grade of the track point that the track section corresponds is different, just the track point row that the road grade is highway is in the front of the track point that the road grade is non-highway, just the road grade be highway the track point with when the quantity of the track point that the road grade is non-highway all satisfies first threshold value, then confirm contain the exit ramp point in the track section.
On the basis of the above embodiment, the exit ramp set acquisition module is specifically configured to:
obtaining track points of a highway with the road grade before track points of a non-highway with the road grade in a track section containing exit ramp points to obtain a first track point set;
and determining the last track point of the first track point set as the exit ramp point.
On the basis of the above embodiment, the exit ramp set acquisition module is specifically configured to:
if the driving tracks comprise a plurality of driving tracks, acquiring exit ramp points to be determined at the same position in each driving track;
acquiring the number of the exit ramp points to be determined contained in the preset area range of each exit ramp point to be determined, and acquiring a first calculation result;
and determining the exit ramp point to be determined corresponding to the first calculation result with the maximum value as the exit ramp point.
On the basis of the foregoing embodiment, the determining module 203 is specifically configured to:
and if the road grade corresponding to the real-time position information is an expressway, the distance between the real-time position information and the common exit ramp point meets a second preset threshold value, and the direction angle deviation between the real-time position information and the common exit ramp point meets a third threshold value range, determining that the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
On the basis of the above embodiment, the early warning module 204 is specifically configured to:
and if the common exit ramp set contains target common exit ramp points within a preset distance from the real-time position information and the running speed of the target vehicle is greater than the preset running speed, early warning is carried out on the target vehicle.
To sum up, under the condition that the vehicle does not use road network data, the corresponding common exit ramp set is obtained through the vehicle identification, and when the common exit ramp set contains the target common exit ramp point within the preset distance from the real-time position information of the target vehicle, the vehicle is early warned in advance, so that the driver is prompted to prepare for exiting the ramp in time, the accuracy and the safety of the vehicle exiting the ramp are improved, and the time waste and the economic loss are reduced.
Fig. 4 is a schematic structural diagram of an entity of an electronic device according to an embodiment of the present application, where as shown in fig. 4, the electronic device includes: a processor (processor) 301, a memory (memory) 302, and a bus 303; wherein:
the processor 301 and the memory 302 complete communication with each other through the bus 303;
the processor 301 is configured to call program instructions in the memory 302 to perform the methods provided by the above-mentioned method embodiments, including: acquiring real-time position information and a vehicle identifier of a target vehicle; acquiring a corresponding common exit turn gather according to the vehicle identification; wherein the common set of exit ramps includes common exit ramp points; judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information; and if so, early warning the target vehicle.
The processor 301 may be an integrated circuit chip having signal processing capabilities. The Processor 301 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. Which may implement or perform the various methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The Memory 502 may include, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an Electrically Erasable Read Only Memory (EEPROM), and the like.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: acquiring real-time position information and a vehicle identifier of a target vehicle; acquiring a corresponding common exit ramp set according to the vehicle identification; wherein the common set of exit ramps includes common exit ramp points; judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information; and if so, early warning the target vehicle.
The present embodiment provides a storage medium, which stores computer instructions, where the computer instructions cause the computer to execute the method provided by the foregoing method embodiments, for example, the method includes: acquiring real-time position information and a vehicle identifier of a target vehicle; acquiring a corresponding common exit turn gather according to the vehicle identification; wherein the common exit ramp set includes common exit ramp points; judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information; and if so, early warning the target vehicle.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some communication interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. An early warning method for an exit ramp of a highway is characterized by comprising the following steps:
acquiring real-time position information and a vehicle identifier of a target vehicle;
acquiring a corresponding common exit ramp set according to the vehicle identification; wherein the common set of exit ramps includes common exit ramp points;
judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information;
if yes, early warning is carried out on the target vehicle;
wherein, the method further comprises:
acquiring a driving track of a historical vehicle; the driving track is a plurality of continuous track points corresponding to the historical vehicle in a preset travel;
intercepting the driving track according to a preset window and a preset step length to obtain a plurality of track sections; the number of track points included in each track segment is the size of the preset window;
determining whether the track segment contains exit ramp points or not according to the road grade of the track point corresponding to each track segment;
acquiring exit ramp points corresponding to a track segment containing the exit ramp points, and generating an exit ramp set according to the acquired exit ramp points;
wherein, the method further comprises:
acquiring the time and the times of the target vehicle passing each historical exit ramp point within a preset time period; wherein the historical off-ramp point is one of the set of off-ramps;
determining a correlation value between the target vehicle and the corresponding historical exit ramp point according to the time and the times of the target vehicle passing through each historical exit ramp point;
and determining a common exit ramp set corresponding to the target vehicle according to the correlation value of the historical exit ramp points.
2. The method of claim 1, wherein the road classes include expressways and non-expressways, and the track points in the track segments are arranged in chronological order; determining whether the track segment contains an exit ramp point according to the road grade of the track point corresponding to each track segment, including:
if the road grades of the track points corresponding to the track segment are the same, the track segment does not contain the exit ramp point;
if the road grade of the track point that the track section corresponds is different, just the track point row that the road grade is highway is in the front of the track point that the road grade is non-highway, just the road grade be highway the track point with when the quantity of the track point that the road grade is non-highway all satisfies first threshold value, then confirm contain the exit ramp point in the track section.
3. The method of claim 1, wherein the obtaining of the corresponding off-ramp point of the track segment containing the off-ramp point comprises:
obtaining track points of a highway with the road grade before track points of a non-highway with the road grade in a track section containing exit ramp points to obtain a first track point set;
and determining the last track point of the first track point set as the exit ramp point.
4. The method of claim 1, wherein the obtaining of the off-ramp point corresponding to the track segment containing the off-ramp point further comprises:
if the driving tracks comprise a plurality of driving tracks, acquiring exit ramp points to be determined at the same position in each driving track;
acquiring the number of the exit ramp points to be determined contained in the preset area range of each exit ramp point to be determined, and acquiring a first calculation result;
and determining the exit ramp point to be determined corresponding to the first calculation result with the maximum value as the exit ramp point.
5. The method of claim 1, wherein the determining whether the set of commonly used exit ramps includes a target commonly used exit ramp point within a preset distance from the real-time location information comprises:
and if the road grade corresponding to the real-time position information is an expressway, the distance between the real-time position information and the common exit ramp point meets a second preset threshold value, and the direction angle deviation between the real-time position information and the common exit ramp point meets a third threshold value range, determining that the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information.
6. The method according to any one of claims 1-5, wherein the pre-warning the target vehicle if included comprises:
and if the common exit ramp set contains target common exit ramp points within a preset distance from the real-time position information and the running speed of the target vehicle is greater than the preset running speed, early warning is carried out on the target vehicle.
7. The utility model provides an early warning device of highway exit ramp which characterized in that includes:
the information acquisition module is used for acquiring real-time position information and vehicle identification of the target vehicle;
the loop gather obtaining module is used for obtaining a corresponding common exit loop gather according to the vehicle identification; wherein the common set of exit ramps includes common exit ramp points;
the judging module is used for judging whether the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information;
the early warning module is used for early warning the target vehicle when the common exit ramp set contains a target common exit ramp point within a preset distance from the real-time position information;
wherein, the device still includes export turn gather and obtains the module for:
acquiring a driving track of a historical vehicle; the driving track is a plurality of continuous track points corresponding to the historical vehicle in a preset travel;
intercepting the driving track according to a preset window and a preset step length to obtain a plurality of track sections; the number of track points included in each track segment is the size of the preset window;
determining whether the track segment contains an exit ramp point or not according to the road grade of the track point corresponding to each track segment;
acquiring exit ramp points corresponding to a track segment containing the exit ramp points, and generating an exit ramp set according to the acquired exit ramp points;
a common exit ramp set acquisition module to:
acquiring the time and the times of the target vehicle passing each historical exit ramp point within a preset time period; wherein the historical off-ramp point is one of the set of off-ramps;
determining a correlation value between the target vehicle and the corresponding historical ramp-off point according to the time and the times of the target vehicle passing through each historical ramp-off point;
and determining a common exit ramp set corresponding to the target vehicle according to the correlation value of the historical exit ramp points.
8. A storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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