CN112810609A - Car following distance adjusting method based on ADAS map - Google Patents
Car following distance adjusting method based on ADAS map Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/14—Adaptive cruise control
- B60W30/16—Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
Abstract
The invention discloses a method for adjusting following distance based on an ADAS map, which comprises the following steps: acquiring the current speed of the vehicle and acquiring the current road traffic flow information and road type of the vehicle through an ADAS map; and judging the current running state of the vehicle according to the current road traffic flow information, the road type and the current vehicle speed, and adjusting the following time distance in real time. By the method for adjusting the following distance based on the ADAS map, the following distance can be automatically adjusted, and comfortable and relieved driving experience is provided for a driver.
Description
Technical Field
The invention relates to the technical field of vehicle driving, in particular to a following distance adjusting method based on an ADAS map.
Background
With the rapid development of the automatic driving assistance technology, the automatic driving assistance technology of the automobile is popularized to the public from the top of science and technology, the automobile is cruising at a constant speed, adaptive cruising and integrated adaptive cruising, the intelligentization degree of the automobile is higher and higher, frequent brake and accelerator stepping is reduced by assisting a driver, the fatigue of the driver is reduced in long-distance or short-distance driving, and the driving is changed from a simple boring traffic mode into a necessity for assisting the driver to make easier and more improved life quality.
However, the related patent technology of self-adaptive cruise is not combined with the function of automatically adjusting the following time distance of the ADAS map; therefore, the problem that the following distance is too far and too close to the following distance can occur, the following distance cannot be adjusted according to the real-time condition, sufficient confidence is provided for the driver, the driver is doubtful about using the function of assisting automatic driving, the use frequency is further reduced, and the unreliable impression is also provided for the driver.
Disclosure of Invention
The invention aims to provide a method for adjusting the following distance based on an ADAS map, which can automatically adjust the following distance and provide comfortable and relieved driving experience for a driver.
In order to achieve the purpose, the invention provides a method for adjusting following distance based on an ADAS map, which comprises the following steps:
(S1) acquiring the current speed of the vehicle and the current road traffic flow information and road type of the vehicle through an ADAS map;
(S2) determining the current driving state of the host vehicle and adjusting the following time interval in real time based on the current road traffic flow information, the road type and the current vehicle speed.
Further, the current running state of the vehicle is judged according to the current road traffic flow information, the road type and the current vehicle speed, the following steps are specifically executed:
if the current vehicle speed is greater than or equal to a first preset vehicle speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a first following vehicle time distance;
if the current speed is greater than or equal to a first preset speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current traffic flow information of the road is congested or seriously congested, the current following vehicle distance state is kept;
if the current vehicle speed is less than the first preset vehicle speed and greater than or equal to the second preset vehicle speed, and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the vehicle following distance is adjusted to be the first vehicle following time distance;
if the current speed is less than the first preset speed and greater than or equal to the second preset speed and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congested or seriously congested, the time interval is adjusted to be a second following time interval;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a second following vehicle time distance;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congestion or severe congestion, the following vehicle distance is adjusted to be a third following vehicle time distance;
the first car following time distance > the second car following time distance > the third car following time distance, and the structured road comprises an urban expressway, a national road and an expressway; common urban roads include urban major roads, provincial roads, county roads, urban minor roads, rural roads, and county-rural interior roads.
Furthermore, the first car following time interval is 2.2s-3s, the second car following time interval is 1.4s-1.8s, and the third car following time interval is 0.8s-1.2 s.
Further, the first preset vehicle speed is 75km/h-100 km/h; the second preset vehicle speed is 30km/h-50km/h, and the preset time is 3s-8 s.
The invention also provides an ADAS map-based following distance adjusting system, which comprises:
the ADAS map is used for providing current road traffic flow information and road types of the vehicle;
the integrated electronic parking brake system is used for providing the current speed of the vehicle;
the system comprises an ADAS map, an integrated electronic parking brake system, an adaptive cruise control system and a vehicle speed control system, wherein the ADAS map and the integrated electronic parking brake system are in communication connection with the adaptive cruise control system, and the adaptive cruise control system can acquire current road traffic flow information and road types of the vehicle from the ADAS map and acquire the current vehicle speed of the vehicle from the integrated electronic parking brake system;
the system for adjusting the following distance based on the ADAS map can execute the steps of the method for adjusting the following distance based on the ADAS map.
The invention also provides a vehicle, which comprises the system for adjusting the following distance based on the ADAS map.
The invention also provides a storage medium, in which a computer-readable program is stored, which, when invoked, is able to execute the steps of the ADAS map-based following distance adjustment method.
Compared with the prior art, the invention has the following advantages:
according to the method for adjusting the following vehicle distance based on the ADAS map, when a front following target exists, the vehicle runs following a front vehicle, the running state of the vehicle on the current road can be judged according to information sent by the ADAS map and the motion state of the vehicle, the following vehicle distance of the vehicle is automatically adjusted, the vehicle can keep a safe and comfortable running state all the time, and a driver is provided with sufficient confidence and relieved experience.
Drawings
FIG. 1 is a flow chart of a following distance adjusting method based on an ADAS map according to the present invention;
fig. 2 is a schematic structural diagram of an ADAS map-based following distance adjusting system.
In the figure:
1-ADAS map, 2-integrated electronic parking brake system, 3-adaptive cruise control system.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1 and 2, the present embodiment discloses a method for adjusting following distance based on ADAS map, including the following steps:
(S1) acquiring the current speed of the vehicle and the current road traffic flow information and road type of the vehicle through an ADAS map;
(S2) determining the current driving state of the host vehicle and adjusting the following time interval in real time based on the current road traffic flow information, the road type and the current vehicle speed.
In this embodiment, the following steps are specifically executed to determine the current driving state of the vehicle and adjust the following time interval in real time according to the current road traffic flow information, the road type and the current vehicle speed:
if the current vehicle speed is greater than or equal to a first preset vehicle speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a first following vehicle time distance;
if the current speed is greater than or equal to a first preset speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current traffic flow information of the road is congested or seriously congested, the current following vehicle distance state is kept;
if the current vehicle speed is less than the first preset vehicle speed and greater than or equal to the second preset vehicle speed, and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the vehicle following distance is adjusted to be the first vehicle following time distance;
if the current speed is less than the first preset speed and greater than or equal to the second preset speed and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congested or seriously congested, the time interval is adjusted to be a second following time interval;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a second following vehicle time distance;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congestion or severe congestion, the following vehicle distance is adjusted to be a third following vehicle time distance;
the first car following time distance > the second car following time distance > the third car following time distance, and the structured road comprises an urban expressway, a national road and an expressway; common urban roads include urban major roads, provincial roads, county roads, urban minor roads, rural roads, and county-rural interior roads.
In this embodiment, the first following interval is 2.2s to 3s, the second following interval is 1.4s to 1.8s, and the third following interval is 0.8s to 1.2 s. Optionally, the first following interval is 2.4s, the second following interval is 1.6s, and the third following interval is 1s, and in some embodiments, other values may also be used, which is not limited thereto.
In the embodiment, the first preset vehicle speed is 75km/h-100 km/h; the second preset vehicle speed is 30km/h-50km/h, and the preset time is 3s-8 s. Optionally, the first preset vehicle speed is 80km/h, the second preset vehicle speed is 40km/h, and the preset time is 5s, and in some embodiments, the preset vehicle speed may be other values, which is not limited thereto.
This embodiment also discloses a following vehicle distance governing system based on ADAS map, include:
the ADAS map 1 is used for providing current road traffic flow information and road types of the vehicle;
the integrated electronic parking brake system 2 is used for providing the current speed of the vehicle;
the system comprises an adaptive cruise control system (3), an ADAS map (1) and an integrated electronic parking brake system (2) are in communication connection with the adaptive cruise control system (3), and the adaptive cruise control system (3) can acquire the current road traffic flow information and road type of the vehicle from the ADAS map (1) and acquire the current vehicle speed of the vehicle from the integrated electronic parking brake system (2);
the system for adjusting the following distance based on the ADAS map can execute the steps of the method for adjusting the following distance based on the ADAS map.
The embodiment also discloses a vehicle, which comprises the system for adjusting the following distance based on the ADAS map.
The embodiment also discloses a storage medium, wherein a computer readable program is stored in the storage medium, and when the computer readable program is called, the steps of the ADAS map-based following distance adjusting method can be executed.
A driver starts a self-adaptive time distance key through an intelligent cabin display terminal assembly according to requirements, the key sends set information to a cruise system, and the cruise system performs fusion processing on a vehicle speed signal sent by an integrated electronic parking brake system and current road information sent by an ADAS map; the cruise system controls the following distance of the vehicle by integrating the ADAS road information and the vehicle speed information. The ADAS map converts the current road traffic flow information and the road type in the ADASIS _ V2 standard protocol into messages required by the adaptive cruise control system and sends the messages to the bus, and the adaptive cruise control system receives the current road traffic flow information and the road type sent by the ADAS map from the bus.
According to the method for adjusting the following vehicle distance based on the ADAS map, when a front following target exists, the vehicle runs following a front vehicle, the running state of the vehicle on the current road can be judged according to information sent by the ADAS map and the motion state of the vehicle, the following vehicle distance of the vehicle is automatically adjusted, the vehicle can keep a safe and comfortable running state all the time, and a driver is provided with sufficient confidence and relieved experience.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. A method for adjusting following distance based on an ADAS map is characterized by comprising the following steps:
(S1) acquiring the current speed of the vehicle and the current road traffic flow information and road type of the vehicle through an ADAS map;
(S2) determining the current driving state of the host vehicle and adjusting the following time interval in real time based on the current road traffic flow information, the road type and the current vehicle speed.
2. The ADAS map-based vehicle following distance adjusting method according to claim 1, wherein the following steps are specifically performed to determine a current driving state of the vehicle and adjust a vehicle following distance in real time according to current road traffic flow information, a road type and a current vehicle speed:
if the current vehicle speed is greater than or equal to a first preset vehicle speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a first following vehicle time distance;
if the current speed is greater than or equal to a first preset speed and the maintaining time is greater than or equal to a preset time, the road type of the current position is a structured road or a common urban road, and the current traffic flow information of the road is congested or seriously congested, the current following vehicle distance state is kept;
if the current vehicle speed is less than the first preset vehicle speed and greater than or equal to the second preset vehicle speed, and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the vehicle following distance is adjusted to be the first vehicle following time distance;
if the current speed is less than the first preset speed and greater than or equal to the second preset speed and the maintaining time is greater than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congested or seriously congested, the time interval is adjusted to be a second following time interval;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is smooth or slow running, the following vehicle distance is adjusted to be a second following vehicle time distance;
if the current vehicle speed is less than a second preset vehicle speed and the maintaining time is more than or equal to the preset time, the road type of the current position is a structured road or a common urban road, and the current road traffic flow information is congestion or severe congestion, the following vehicle distance is adjusted to be a third following vehicle time distance;
the first car following time distance > the second car following time distance > the third car following time distance, and the structured road comprises an urban expressway, a national road and an expressway; common urban roads include urban major roads, provincial roads, county roads, urban minor roads, rural roads, and county-rural interior roads.
3. The ADAS map-based following headway adjustment method according to claim 2, wherein the first following headway is 2.2s "3 s, the second following headway is 1.4 s" 1.8s, and the third following headway is 0.8s "1.2 s.
4. An ADAS map based following distance adjusting method according to claim 2 or 3, wherein the first preset vehicle speed is 75km/h-100 km/h; the second preset vehicle speed is 30km/h-50km/h, and the preset time is 3s-8 s.
5. An ADAS map-based vehicle following distance adjusting system, comprising:
an ADAS map (1) for providing current road traffic flow information and road types of a host vehicle;
an integrated electronic parking brake system (2) for providing a current vehicle speed of the host vehicle;
the system comprises an adaptive cruise control system (3), an ADAS map (1) and an integrated electronic parking brake system (2) are in communication connection with the adaptive cruise control system (3), and the adaptive cruise control system (3) can acquire current road traffic flow information and road types of the vehicle from the ADAS map (1) and acquire the current speed of the vehicle from the integrated electronic parking brake system (2);
the ADAS map based car following distance adjustment system is capable of performing the steps of the ADAS map based car following distance adjustment method of any of claims 1 to 4.
6. A vehicle comprising an ADAS map based following distance adjustment system according to claim 5.
7. A storage medium having a computer readable program stored therein, wherein the computer readable program, when invoked, is capable of performing the steps of the ADAS map based following distance adjustment method according to any of claims 1 to 4.
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