CN107170291B - Driving prompting method and system, vehicle-mounted terminal and automobile - Google Patents
Driving prompting method and system, vehicle-mounted terminal and automobile Download PDFInfo
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- CN107170291B CN107170291B CN201710506654.5A CN201710506654A CN107170291B CN 107170291 B CN107170291 B CN 107170291B CN 201710506654 A CN201710506654 A CN 201710506654A CN 107170291 B CN107170291 B CN 107170291B
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Abstract
The invention provides a driving prompting method, a prompting system, a vehicle-mounted terminal and an automobile, wherein the driving prompting method comprises the steps of obtaining a curve curvature radius sent by a road side unit arranged at a curve; and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve. According to the driving prompting method provided by the invention, the curve curvature radius corresponding to the real-time position of the curve is obtained through the road side unit, the calculated amount of a terminal can be reduced, the real-time performance is good, corresponding overspeed, meeting and following early warning prompts are carried out according to the curve curvature radius and the driving information of the first vehicle, the driving safety of a driver at the curve can be ensured, and the problems that the driver misjudges due to the fact that the vehicle curve early warning system needs to disperse the attention of the driver and prompt at different speed limits in the prior art and the driver misjudges due to the fact that the driving vehicles in different directions are not considered comprehensively are solved.
Description
Technical Field
The invention relates to the technical field of driving, in particular to a driving prompting method, a driving prompting system, a vehicle-mounted terminal and a vehicle.
Background
The existing curve vehicle early warning systems are various, most of the existing curve vehicle early warning systems calculate a vehicle speed threshold or a distance threshold based on parameters such as curvature radius of a curve detected by a vehicle or a road sensor, and when a vehicle runs over speed or the vehicle comes from the opposite side of the curve, the early warning is provided for a driver. For example, vehicle information is detected by a sensor at the entrance of a curve, and a speed limit sign at the entrance of the curve indicates a license plate number and corresponding speed limit information. Although the method can prompt different speed limits according to different vehicles, the following problems exist:
the curvature radius of the curve is not invariable, and the curvature adopted by the calculation method is the maximum curvature; the method can only prompt the speed limit value of a single vehicle, and information interaction cannot be carried out between the vehicles; when the number of vehicles entering a curve increases, misunderstandings are easily caused by different speed limits; the driver needs to be distracted to confirm the speed limit of the host vehicle.
The prior art also provides a curve early warning method based on the internet of vehicles, which needs to acquire the driving speed of a front vehicle and the relative distance between a front vehicle and a rear vehicle, and combines a positioning system to acquire the radius R of a curve; and then according to the vehicle sensor, acquiring the driving speed, the actual yaw angle vehicle speed and the like of the vehicle, integrating the information, and calculating the curve collision avoidance early warning distance Dw and the curve forced braking distance Db, thereby controlling the vehicle to achieve the effects of curve collision avoidance and stability system coordination. Although the method can perform vehicle anti-collision control, the following defects still exist:
the radius of the curve is still required to be calculated by the vehicle through a positioning system, the calculation resources of a central processing unit are occupied, and the calculation precision is limited by the calculation method and the precision of the positioning system; only the curve collision when the front vehicle runs is considered, and the speed limit of the single vehicle passing through the curve is not considered; meanwhile, the early warning condition of the oncoming vehicle is not considered in the method.
Disclosure of Invention
The embodiment of the invention provides a driving prompting method, a prompting system, a vehicle-mounted terminal and a vehicle, and aims to solve the problems that in the prior art, a vehicle curve early warning system needs to disperse the attention of a driver, different speed limit prompts cause misjudgment of the driver, and incompleteness is considered for driving vehicles in different directions.
The embodiment of the invention provides a driving prompting method, which comprises the following steps:
acquiring a curve curvature radius sent by a road side unit arranged at a curve;
and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
Wherein, according to the curvature radius of the curve and the driving information of the first vehicle at the curve, the step of carrying out early warning prompt comprises the following steps:
determining a vehicle speed threshold of a first vehicle according to the curvature radius of the curve;
acquiring first driving information of the first vehicle;
and carrying out early warning prompt on the first vehicle at the curve according to the vehicle speed threshold of the first vehicle and the first driving information.
The method comprises the following steps of carrying out early warning prompt on a first vehicle at the curve according to the vehicle speed threshold of the first vehicle and the first driving information, wherein the step of carrying out early warning prompt on the first vehicle at the curve comprises the following steps:
and if the first driving information shows that the current speed of the first vehicle is greater than the speed threshold value, carrying out overspeed early warning prompt on the first vehicle.
Wherein the method further comprises:
acquiring second driving information of a second vehicle which is communicated with the first vehicle;
and carrying out early warning prompt on the first vehicle at the curve according to the first driving information and the second driving information.
Wherein, according to the first driving information and the second driving information, the step of carrying out early warning prompt on the first vehicle at the curve comprises the following steps:
and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is positioned in front of the first vehicle, performing vehicle following early warning prompt on the first vehicle according to the vehicle following distance of the first vehicle.
Wherein, according to the vehicle following distance of the first vehicle to the first vehicle follow the vehicle early warning suggestion the step includes:
acquiring a vehicle distance threshold value of the first vehicle and the second vehicle;
determining a following distance between the first vehicle and the second vehicle according to the driving positions of the first vehicle and the second vehicle;
and when the vehicle following distance is smaller than the vehicle distance threshold value, performing vehicle following early warning prompt on the first vehicle.
Wherein the step of obtaining the vehicle distance threshold of the first vehicle and the second vehicle comprises:
calculating an absolute value of a vehicle speed difference between a first vehicle speed of the first vehicle and a second vehicle speed of the second vehicle as a first reference value;
and calculating the product of the first reference value and the reaction duration, and determining the sum of the product and a preset constant as the vehicle distance threshold.
Wherein, according to the first driving information and the second driving information, the step of carrying out early warning prompt on the first vehicle at the curve comprises the following steps:
and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are opposite, carrying out meeting early warning prompt on the first vehicle.
The embodiment of the invention also provides a vehicle-mounted terminal, which is used for acquiring the curvature radius of the curve sent by the road side unit arranged at the curve; and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
The embodiment of the invention also provides a driving prompting system, which comprises a road side unit arranged at the bend and a vehicle-mounted terminal communicated with the road side unit; the vehicle-mounted terminal is used for acquiring the curvature radius of the curve sent by the road side unit; and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
The vehicle-mounted terminal is communicated with the brake system and used for obtaining the reaction time in the vehicle following process.
The embodiment of the invention also provides an automobile which comprises the vehicle-mounted terminal.
The technical scheme of the embodiment of the invention at least comprises the following beneficial effects:
according to the technical scheme, the curve curvature radius corresponding to the position of the current vehicle detected by the road side unit is obtained through real-time communication with the road side unit arranged at the curve, early warning prompt is carried out according to the curve curvature radius and the driving information of the first vehicle at the curve, the calculated amount of a terminal can be reduced, good real-time performance is achieved, corresponding overspeed, meeting and following early warning prompt is carried out according to the curve curvature radius and the driving information of the first vehicle, driving safety of a driver at the curve can be guaranteed, and the problems that in the prior art, the driver misjudgment is caused by the fact that a vehicle curve early warning system needs to disperse attention of the driver and prompt with different speed limits, and incompleteness is considered for driving vehicles in different directions are solved.
Drawings
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic view of a driving prompting method provided by an embodiment of the invention;
FIG. 2 is a first schematic diagram of a vehicle and a roadside unit communication provided by an embodiment of the invention;
FIG. 3 is a schematic diagram of a vehicle and roadside unit communication provided by an embodiment of the invention;
fig. 4 is a schematic diagram illustrating a driving prompting method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a driving prompting method, as shown in fig. 1, including:
The driving prompting method is applied to the vehicle-mounted terminal, wherein the vehicle-mounted terminal and the road side unit at the bend are communicated by using a special short-range communication technology. The vehicle-mounted terminal is arranged on a traveling vehicle, when the curve curvature radius corresponding to the curve in real time is obtained, the vehicle-mounted terminal arranged on the vehicle obtains the real-time position information of the vehicle, the real-time position information of the vehicle is sent to the road side unit, the road side unit determines the corresponding curve curvature radius according to the real-time position information after receiving the real-time position information sent by the vehicle-mounted terminal, and then the determined curve curvature radius is fed back to the vehicle-mounted terminal.
The vehicle-mounted terminal reports the real-time position information of the vehicle, the curve curvature radius corresponding to the vehicle in real time can be obtained, the communication time between the vehicle-mounted terminal and the road side unit is short, and the calculation time of the curve curvature radius by the road side unit according to the real-time position of the first vehicle is negligible. Therefore, the vehicle-mounted terminal can acquire the curve curvature radius corresponding to the real-time position of the vehicle.
After the in-vehicle terminal acquires the curve radius of curvature, step 102 may be executed.
And 102, carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
After the curvature radius of the curve corresponding to the real-time position of the vehicle is obtained, the driving information of the first vehicle travelling at the curve is obtained, and early warning prompt is carried out according to the curvature radius of the curve and the driving information of the first vehicle.
Wherein, according to the curve curvature radius to and the driving information of the first vehicle that is in curve department, when carrying out the early warning suggestion: determining a vehicle speed threshold of a first vehicle according to the curvature radius of the curve; acquiring first driving information of a first vehicle; and carrying out early warning prompt on the first vehicle at the curve according to the vehicle speed threshold value and the first driving information of the first vehicle.
As shown in fig. 2, a schematic diagram of the present embodiment of the invention is shown, in which a current vehicle communicates with a roadside unit 21 disposed at a curve. The vehicle-mounted terminal is arranged on the first vehicle, receives the curve curvature radius corresponding to the current position of the first vehicle fed back by the road side unit after transmitting the position information of the first vehicle to the road side unit, and determines the vehicle speed threshold corresponding to the first vehicle according to the curve curvature radius after the vehicle-mounted terminal acquires the curve curvature radius corresponding to the first vehicle. Then, the vehicle-mounted terminal needs to acquire first driving information of the first vehicle, wherein the first driving information of the first vehicle at least comprises driving speed. After the first driving information of the first vehicle is obtained, the vehicle-mounted terminal carries out early warning prompt on the first vehicle driving at the curve according to the first driving information of the first vehicle and a vehicle speed threshold determined according to the curvature radius of the curve.
When early warning prompt is carried out on the first vehicle at the curve according to the vehicle speed threshold value and the first driving information of the first vehicle: and if the first driving information shows that the current speed of the first vehicle is greater than the speed threshold value, carrying out overspeed early warning prompt on the first vehicle.
After the speed threshold value of the first vehicle and the first driving information are obtained, the current speed of the first vehicle contained in the first driving information is obtained, the current speed of the first vehicle is compared with the speed threshold value of the first vehicle, whether the current speed of the first vehicle is greater than the speed threshold value of the first vehicle or not is judged, and when the current speed of the first vehicle is greater than the speed threshold value of the first vehicle, the vehicle-mounted terminal carries out overspeed early warning prompt on the first vehicle, so that the speed of the driver is reduced according to the early warning information, and the driving safety is guaranteed.
In an embodiment of the present invention, on the basis of the above scheme, the method further includes:
acquiring second driving information of a second vehicle which is communicated with the first vehicle; and early warning and prompting are carried out on the first vehicle at the curve according to the first driving information and the second driving information.
The vehicle-mounted terminal can also acquire second driving information of a second vehicle, wherein the vehicle-mounted terminal is arranged on the first vehicle, and for convenience of distinguishing, the vehicle-mounted terminal on the first vehicle is used as the first vehicle-mounted terminal, and the vehicle-mounted terminal on the second vehicle is used as the second vehicle-mounted terminal. As shown in fig. 3, a schematic diagram of a first vehicle and a second vehicle traveling at a curve and communicating with a road side unit 21 provided at the curve is provided in the embodiment of the present invention.
The second vehicle-mounted terminal is arranged on the second vehicle, second driving information of the second vehicle can be monitored, after the second driving information is obtained, wireless communication is carried out between the first vehicle-mounted terminal and the second vehicle-mounted terminal, the second vehicle-mounted terminal sends the second driving information to the first vehicle-mounted terminal, and after the second driving information is obtained by the first vehicle-mounted terminal, early warning prompt can be carried out on the first vehicle at a curve according to the first driving information of the first vehicle and the second driving information of the second vehicle.
Wherein, according to first driving information and second driving information, when carrying out early warning suggestion to the first vehicle that is in bend department:
and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is positioned in front of the first vehicle, carrying out vehicle following early warning prompt on the first vehicle according to the vehicle following distance of the first vehicle.
The first traveling information includes at least: a travel speed of the first vehicle, a travel position of the first vehicle, and a travel direction of the first vehicle; the corresponding second driving information at least comprises: a travel speed of the second vehicle, a travel position of the second vehicle, and a travel direction of the second vehicle.
After the vehicle-mounted terminal acquires the first driving information and the second driving information, when the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is located in front of the first vehicle according to the first driving information and the second driving information, the vehicle-mounted terminal needs to determine the vehicle following distance of the first vehicle at the moment, and vehicle following early warning prompt is carried out on the first vehicle according to the vehicle following distance of the first vehicle.
Wherein, when following the car distance according to first vehicle and following the car early warning suggestion to first vehicle: acquiring a vehicle distance threshold value of a first vehicle and a second vehicle; determining a following distance between the first vehicle and the second vehicle according to the driving positions of the first vehicle and the second vehicle; when the following distance is smaller than the vehicle distance threshold value, the following early warning prompt is carried out on the first vehicle.
The vehicle-mounted terminal needs to acquire a vehicle distance threshold value between a first vehicle and a second vehicle, after the vehicle distance threshold value between the first vehicle and the second vehicle is determined, the distance between the first vehicle and the second vehicle is determined according to the running position information of the first vehicle and the running position information of the second vehicle, the distance between the first vehicle and the second vehicle is used as a vehicle following distance, after the vehicle following distance between the first vehicle and the second vehicle is determined, the vehicle following distance is compared with the vehicle distance threshold value, whether the vehicle following distance is smaller than the vehicle distance threshold value or not is judged, and when the vehicle following distance is smaller than the vehicle distance threshold value, the vehicle-mounted terminal carries out vehicle following early warning prompt on the first vehicle located behind the vehicle, so that a driver keeps safe vehicle following distance and runs.
When the vehicle-mounted terminal acquires the vehicle distance threshold value of the first vehicle and the second vehicle: calculating an absolute value of a vehicle speed difference between a first vehicle speed of the first vehicle and a second vehicle speed of the second vehicle as a first reference value; and calculating the product of the first reference value and the reaction duration, and determining the sum of the obtained product and a preset constant as the vehicle distance threshold.
When the vehicle distance threshold is determined, a first vehicle speed of a first vehicle and a second vehicle speed of a second vehicle need to be obtained, then, an absolute value of a difference value between the first vehicle speed and the second vehicle speed is calculated to serve as a first reference value, after the absolute value of the difference value between the first vehicle speed and the second vehicle speed is determined to serve as the first reference value, a product of the first reference value and the reaction time length of a driver is calculated, and the obtained value is added with a preset constant to determine the vehicle distance threshold.
In the embodiment of the present invention, when performing the early warning prompt on the first vehicle at the curve according to the first driving information and the second driving information, the method further includes: and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are opposite, carrying out meeting early warning prompt on the first vehicle.
When the vehicle-mounted terminal determines that the driving directions of the first vehicle and the second vehicle are opposite according to the first driving information and the second driving information, the vehicle-mounted terminal conducts vehicle meeting early warning prompt on the first vehicle, and a driver conducts vehicle meeting operation according to the early warning prompt.
In the technical scheme provided by the embodiment of the invention, the vehicle-mounted terminal can perform overspeed early warning prompt and car following early warning prompt on the vehicle, can also perform overspeed early warning prompt and car meeting early warning prompt on the vehicle, and can only perform overspeed early warning prompt, wherein the specific prompt condition needs to be determined according to the driving information of the vehicle running at the curve.
When only one vehicle runs at a curve, the vehicle-mounted terminal needs to perform overspeed early warning prompt; when two vehicles are driven at the curve, whether overspeed early warning prompt and meeting early warning prompt or overspeed early warning prompt and car following early warning prompt are carried out needs to be determined according to the driving conditions of the vehicles.
In the embodiment of the invention, a first vehicle is taken as a reference, a vehicle-mounted terminal is a first vehicle-mounted terminal arranged on the first vehicle, the vehicle-mounted terminal acquires information of the first vehicle to perform overspeed early warning prompt on the first vehicle, the vehicle-mounted terminal acquires information of a second vehicle through communication between the vehicle-mounted terminal and a second vehicle-mounted terminal on the second vehicle, and overspeed and meeting early warning prompt is performed on the first vehicle or overspeed and following early warning prompt is performed on the first vehicle according to the information of the first vehicle and the information of the second vehicle.
The flow of the driving prompting method provided by the embodiment of the invention can also be seen in fig. 4, and includes:
And step 402, the vehicle-mounted terminal determines a vehicle speed threshold value of the current position according to the curvature radius of the curve.
And step 403, judging whether the current vehicle is overspeed, executing step 404 when the current vehicle is overspeed, otherwise executing step 402.
And step 404, carrying out overspeed early warning prompt on the current vehicle.
Wherein the in-vehicle terminal performs step 405 simultaneously with step 401.
And step 406, judging whether the vehicle is an oncoming vehicle or not according to the running information of the surrounding vehicles, if so, executing step 407, and otherwise, executing step 408.
And 407, the vehicle-mounted terminal performs vehicle meeting early warning prompt on the current vehicle.
And step 408, determining the following distance of the current vehicle according to the running information of the surrounding vehicles.
And 409, judging whether the following distance is smaller than the vehicle distance threshold, executing 410 if the following distance is smaller than the vehicle distance threshold, and executing 408 if the following distance is not smaller than the vehicle distance threshold.
And step 410, carrying out vehicle following early warning prompt on the current vehicle.
In the embodiment of the invention, the curve curvature radius corresponding to the position of the current vehicle detected by the road side unit is obtained through real-time communication with the road side unit arranged at the curve, the early warning prompt is carried out according to the curve curvature radius and the driving information of the first vehicle at the curve, the calculated amount of a terminal can be reduced, the real-time performance is good, and the corresponding overspeed, meeting and following early warning prompt is carried out according to the curve curvature radius and the driving information of the first vehicle, so that the driving safety of a driver at the curve can be ensured, and the problems that the driver misjudges due to the fact that the vehicle curve early warning system needs to disperse the attention of the driver and remind at different speed limits in the prior art and the driver misjudges in different directions are avoided.
The embodiment of the invention also provides a vehicle-mounted terminal, which is used for acquiring the curvature radius of the curve sent by the road side unit arranged at the curve; and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
The current vehicle-mounted terminal can be communicated with a road side unit arranged at a curve, the current vehicle-mounted terminal can be communicated with vehicle-mounted terminals arranged on other vehicles, when the current vehicle-mounted terminal is communicated with the road side unit, the curve curvature radius fed back by the road side unit is obtained, the current vehicle-mounted terminal determines a vehicle speed threshold value corresponding to the current vehicle according to the curve curvature radius, and then overspeed early warning prompt is carried out according to the vehicle speed threshold value and the current vehicle speed.
When the current vehicle-mounted terminal communicates with vehicle-mounted terminals arranged on other vehicles, the driving information of the other vehicles can be acquired, and the current vehicle-mounted terminal can carry out meeting early warning prompt or following early warning prompt on the current vehicle according to the driving information of the current vehicle and the driving information of the other vehicles.
The embodiment of the invention also provides a driving prompting system, which comprises a road side unit arranged at the bend and a vehicle-mounted terminal communicated with the road side unit; the vehicle-mounted terminal is used for acquiring the curvature radius of the curve sent by the road side unit; and carrying out early warning prompt according to the curvature radius of the curve and the driving information of the first vehicle at the curve.
The driving prompting system comprises a road side unit and vehicle-mounted terminals, wherein each vehicle corresponds to one vehicle-mounted terminal, the vehicle-mounted terminals can communicate with each other, the vehicle-mounted terminals can send position information of the current vehicle to the road side unit, the road side unit determines the curvature radius of a curve corresponding to the current vehicle according to the received position information, after the curvature radius of the curve corresponding to the current vehicle is determined, the curvature radius of the curve is sent to the vehicle-mounted terminals, the vehicle-mounted terminals determine a vehicle speed threshold value according to the curvature radius of the curve, and then overspeed early warning prompting is carried out, so that a driver can drive within a safe vehicle speed.
The vehicle-mounted terminal can also acquire the driving information of other vehicles, and the current vehicle-mounted terminal can carry out meeting early warning prompt or following early warning prompt on the current vehicle according to the driving information of the current vehicle and the driving information of the other vehicles.
When the vehicle following early warning prompt is carried out according to the driving information of the current vehicle and the driving information of other vehicles, a vehicle distance threshold value between the current vehicle and other vehicles needs to be determined, and when the vehicle distance threshold value is determined, an absolute value of a vehicle speed difference between a first vehicle speed of the current vehicle and a second vehicle speed of other vehicles in front of the current vehicle is calculated and used as a first reference value; and calculating the product of the first reference value and the reaction duration, and determining the sum of the obtained product and a preset constant as the vehicle distance threshold. The vehicle-mounted terminal is communicated with the brake system and used for obtaining the reaction time of a driver in the vehicle following process.
The embodiment of the invention also provides an automobile which comprises the vehicle-mounted terminal, the curvature radius of the curve can be obtained through the vehicle-mounted terminal, early warning prompt is carried out according to the curvature radius of the curve and the driving information of the first vehicle at the curve, the calculated amount is reduced, good real-time performance is realized, corresponding overspeed, meeting and following early warning prompt is carried out according to the curvature radius of the curve and the driving information of the first vehicle, the driving safety of a driver at the curve can be ensured, and the problems that in the prior art, the driver misjudgment is caused by the fact that a vehicle curve early warning system needs to disperse the attention of the driver and different speed limit prompts, and incompleteness is considered for driving vehicles in different directions are solved.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (9)
1. A driving prompting method is characterized by comprising the following steps:
acquiring a curve curvature radius sent by a road side unit arranged at a curve;
according to the curvature radius of the curve and first driving information of a first vehicle at the curve, early warning prompt is carried out;
acquiring second driving information of a second vehicle which is communicated with the first vehicle;
according to the first driving information and the second driving information, early warning prompt is carried out on a first vehicle at a curve;
the step of carrying out early warning prompt on the first vehicle at the curve according to the first driving information and the second driving information comprises the following steps:
if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is positioned in front of the first vehicle, performing vehicle following early warning prompt on the first vehicle according to the vehicle following distance of the first vehicle;
if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are opposite, vehicle meeting early warning prompt is carried out on the first vehicle;
the step of obtaining the curvature radius of the curve sent by the road side unit arranged at the curve comprises the following steps: the method comprises the steps of sending real-time position information of a first vehicle to a road side unit, and obtaining a corresponding curve curvature radius determined by the road side unit according to the received real-time position information of the first vehicle.
2. The method of claim 1, wherein the step of providing an early warning indication based on the radius of curvature of the curve and the driving information of the first vehicle at the curve comprises:
determining a vehicle speed threshold of a first vehicle according to the curvature radius of the curve;
acquiring first driving information of the first vehicle;
and carrying out early warning prompt on the first vehicle at the curve according to the vehicle speed threshold of the first vehicle and the first driving information.
3. The method of claim 2, wherein the step of providing an early warning to the first vehicle at the curve based on the first vehicle speed threshold and the first driving information comprises:
and if the first driving information shows that the current speed of the first vehicle is greater than the speed threshold value, carrying out overspeed early warning prompt on the first vehicle.
4. The driving prompt method according to claim 1, wherein the step of performing the following warning prompt on the first vehicle according to the following distance of the first vehicle comprises:
acquiring a vehicle distance threshold value of the first vehicle and the second vehicle;
determining a following distance between the first vehicle and the second vehicle according to the driving positions of the first vehicle and the second vehicle;
and when the vehicle following distance is smaller than the vehicle distance threshold value, performing vehicle following early warning prompt on the first vehicle.
5. The driving prompting method according to claim 4, wherein the step of obtaining the vehicle distance threshold value of the first vehicle and the second vehicle comprises:
calculating an absolute value of a vehicle speed difference between a first vehicle speed of the first vehicle and a second vehicle speed of the second vehicle as a first reference value;
and calculating the product of the first reference value and the reaction duration, and determining the sum of the product and a preset constant as the vehicle distance threshold.
6. A vehicle-mounted terminal, characterized in that the vehicle-mounted terminal is configured to: the method comprises the steps that real-time position information of a first vehicle is sent to a road side unit at a curve, and a corresponding curve curvature radius determined by the road side unit according to the received real-time position information of the first vehicle is obtained; according to the curvature radius of the curve and first driving information of a first vehicle at the curve, early warning prompt is carried out; the vehicle-mounted terminal is further used for: acquiring second driving information of a second vehicle which is communicated with the first vehicle;
according to the first driving information and the second driving information, early warning prompt is carried out on a first vehicle at a curve;
the step of carrying out early warning prompt on the first vehicle at the curve according to the first driving information and the second driving information comprises the following steps:
if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is positioned in front of the first vehicle, performing vehicle following early warning prompt on the first vehicle according to the vehicle following distance of the first vehicle;
and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are opposite, carrying out meeting early warning prompt on the first vehicle.
7. A driving prompting system is characterized by comprising a road side unit arranged at a bend and a vehicle-mounted terminal communicated with the road side unit; the vehicle-mounted terminal is used for: the method comprises the steps that real-time position information of a first vehicle is sent to a road side unit, and a corresponding curve curvature radius determined by the road side unit according to the received real-time position information of the first vehicle is obtained; according to the curvature radius of the curve and first driving information of a first vehicle at the curve, early warning prompt is carried out; the vehicle-mounted terminal is further used for: acquiring second driving information of a second vehicle which is communicated with the first vehicle;
according to the first driving information and the second driving information, early warning prompt is carried out on a first vehicle at a curve;
the step of carrying out early warning prompt on the first vehicle at the curve according to the first driving information and the second driving information comprises the following steps:
if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are the same and the second vehicle is positioned in front of the first vehicle, performing vehicle following early warning prompt on the first vehicle according to the vehicle following distance of the first vehicle;
and if the first driving information and the second driving information indicate that the driving directions of the first vehicle and the second vehicle are opposite, carrying out meeting early warning prompt on the first vehicle.
8. A driving prompt system as recited in claim 7, wherein the vehicle-mounted terminal is in communication with a braking system for obtaining the reaction time during the following process.
9. An automobile characterized in that the automobile comprises the in-vehicle terminal according to claim 6.
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|---|---|---|---|---|
| CN108153854B (en) * | 2017-12-22 | 2021-08-17 | 东软集团股份有限公司 | Curve classification method, road side unit, vehicle-mounted terminal and electronic equipment |
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