CN110614992A - Method and system for avoiding obstacle during automatic driving of vehicle and vehicle - Google Patents
Method and system for avoiding obstacle during automatic driving of vehicle and vehicle Download PDFInfo
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- CN110614992A CN110614992A CN201811637022.3A CN201811637022A CN110614992A CN 110614992 A CN110614992 A CN 110614992A CN 201811637022 A CN201811637022 A CN 201811637022A CN 110614992 A CN110614992 A CN 110614992A
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- 230000004888 barrier function Effects 0.000 claims abstract description 67
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
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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
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
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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
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/09—Taking automatic action to avoid collision, e.g. braking and steering
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- Automation & Control Theory (AREA)
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- Mechanical Engineering (AREA)
- Traffic Control Systems (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention provides a method and a system for avoiding obstacles during automatic driving of a vehicle and the vehicle, wherein the method comprises the following steps: providing a road environment model of a preset range near a vehicle; if a plurality of obstacles exist in the current driving lane within a preset range, acquiring the position and the size of a first adjacent obstacle, the position and the size of a second adjacent obstacle, the width of the current driving lane and the distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to a road environment model, and acquiring the speed of the vehicle; and controlling the vehicle to change the lane and avoid the barrier when judging that the vehicle cannot pass by the first adjacent barrier and the second adjacent barrier in the current driving lane according to the position and the size of the first barrier, the position and the size of the second barrier, the speed of the vehicle and the distance between the barriers. The method can judge whether the vehicle can pass according to the position and the size of the obstacle of the current driving road and the width of the current driving road, and further control the vehicle.
Description
Technical Field
The invention relates to the technical field of automatic driving of vehicles, in particular to a method and a system for avoiding obstacles during automatic driving of a vehicle and the vehicle.
Background
The vehicle unmanned driving means that the vehicle senses the road environment through the vehicle-mounted sensing system, automatically plans a driving route and controls the vehicle to drive. When the vehicle is driven automatically, if the current driving lane has an obstacle, the obstacle information needs to be acquired, and the vehicle is controlled to avoid the obstacle. Therefore, a technology for avoiding obstacles in automatic driving is needed.
Disclosure of Invention
In view of the above, a first objective of the present invention is to provide an obstacle avoidance method for automatically driving a vehicle, which can determine whether the vehicle can pass according to the position and size of an obstacle on the current driving road, and further control the vehicle to drive.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for avoiding obstacles during automatic driving of a vehicle comprises the following steps: providing a road environment model of a preset range near a vehicle, wherein the road environment model comprises lane positions and lane widths in the preset range near the vehicle, and the size and position of an obstacle; if a plurality of obstacles exist in the current driving lane in the preset range, acquiring the position and the size of a first adjacent obstacle, the position and the size of a second adjacent obstacle, the width of the current driving lane and the distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to the road environment model, and acquiring the speed of the vehicle; judging whether the vehicle can pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane according to the position and the size of the first adjacent obstacle, the position and the size of the second adjacent obstacle, the speed of the vehicle and the distance between the obstacles; if the vehicle cannot avoid the first adjacent barrier and the second adjacent barrier in the current driving lane to pass, controlling the vehicle to change the lane and avoid the barrier; the first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
Further, the step of determining whether the vehicle can pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane according to the position and the size of the first obstacle, the position and the size of the second obstacle, the vehicle speed of the vehicle, and the obstacle distance specifically includes: obtaining the passing width of the first adjacent obstacle according to the position and the size of the first adjacent obstacle and the width of the current driving lane; if the passing width at the first adjacent obstacle is smaller than a first preset safe passing width, determining that the vehicle cannot pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane; if the passing width of the first adjacent barrier is larger than the first preset safe passing width, obtaining the passing width of the second adjacent barrier according to the position and the size of the second adjacent barrier and the width of the current driving lane; determining that the vehicle cannot pass by avoiding the first and second adjacent obstacles in the current driving lane if the passing width at the second adjacent obstacle is smaller than the first preset safe passing width; if the passing width of the second adjacent barrier is larger than the first preset safe passing width, acquiring the position of a vehicle passing through the first adjacent barrier and the position of a vehicle passing through the second adjacent barrier; judging whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance; determining that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle within the current driving lane if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
Further, the step of determining whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle, and the obstacle distance may specifically include: taking the position of the vehicle passing through the first adjacent obstacle as a starting point and the position of the vehicle passing through the second adjacent obstacle as an end point, and judging whether the vehicle can run at a constant speed or at a reduced speed to the end point from the starting point at the distance between the obstacles; determining that the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if the vehicle can travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance; determining that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if it may not travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance.
Further, after the step of providing the road environment model of the preset range near the vehicle, the method further includes: if an obstacle exists in the current driving lane in the preset range, acquiring the position and the size of the obstacle according to the road environment model, and acquiring the lane width of the current driving lane; obtaining the passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane; and if the passing width of the obstacle is smaller than a second preset safe passing width, controlling the vehicle to change the lane and avoid the obstacle.
Further, the step of providing a road environment model of a preset range near the vehicle specifically includes: acquiring position information of the vehicle, the position and the size of an obstacle in the current driving lane, and lane position and lane width information in a preset range near the vehicle; and generating the road environment model according to the position information of the vehicle, the position and the size of the obstacle in the current driving lane, and the lane position and the lane width information in the preset range near the vehicle.
Compared with the prior art, the obstacle avoidance method for the automatic driving of the vehicle has the following advantages:
the method for avoiding the obstacle during the automatic driving of the vehicle comprises the steps of firstly generating a road environment model in a preset range near the vehicle, and providing lane lines of all lanes and the position size of an obstacle in a current driving lane on the road environment model. When a plurality of obstacles exist in the effective detection range of the current lane, judging whether the vehicle can avoid the two obstacles to pass in the current driving lane according to the passing width of the two obstacles closest to the vehicle, the distance between the two obstacles in the driving direction of the vehicle and the speed of the vehicle, and further controlling the vehicle to drive; when only one obstacle exists in the effective detection range of the current driving lane, whether the passing width of the obstacle can be used for the vehicle to avoid the obstacle or not is judged, and then the vehicle is controlled to drive.
The invention also aims to provide a system for avoiding obstacles during automatic driving of a vehicle, which can judge whether the vehicle can pass according to the position and the size of the obstacles on the current driving road so as to control the vehicle to drive.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a system for obstacle avoidance while a vehicle is being autonomously driven, comprising: the road environment model providing module is used for providing a road environment model of a preset range near a vehicle, and the road environment model comprises lane positions and lane widths in the preset range near the vehicle and the size and position of an obstacle; a control module, configured to, when it is known that a plurality of obstacles exist in the preset range in the current driving lane according to the road environment model, obtain a position and a size of a first adjacent obstacle, a position and a size of a second adjacent obstacle, a width of the current driving lane, and an obstacle distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to the road environment model, obtain a vehicle speed of the vehicle, further determine whether the vehicle can avoid the first adjacent obstacle and the second adjacent obstacle in the current driving lane according to the position and the size of the first adjacent obstacle, the position and the size of the second adjacent obstacle, the vehicle speed, and the obstacle distance, and when it is impossible to avoid the first adjacent obstacle and the second adjacent obstacle in the current driving lane, controlling the vehicle to change the lane and avoid the obstacle; the first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
Further, the control module is specifically configured to obtain a passing width of the first adjacent obstacle according to the position and size of the first adjacent obstacle and the width of the current driving lane; if the passing width at the first adjacent obstacle is smaller than a first preset safe passing width, determining that the vehicle cannot pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane; if the passing width of the first adjacent barrier is larger than the first preset safe passing width, obtaining the passing width of the second adjacent barrier according to the position and the size of the second adjacent barrier and the width of the current driving lane; determining that the vehicle cannot pass by avoiding the first and second adjacent obstacles in the current driving lane if the passing width at the second adjacent obstacle is smaller than the first preset safe passing width; if the passing width of the second adjacent barrier is larger than the first preset safe passing width, acquiring the position of a vehicle passing through the first adjacent barrier and the position of a vehicle passing through the second adjacent barrier; judging whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance; determining that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle within the current driving lane if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
Further, the control module is specifically configured to determine whether the vehicle can travel from the starting point to the end point at a constant speed or a reduced speed between the obstacles, with the position of the vehicle passing through the first adjacent obstacle as a starting point and the position of the vehicle passing through the second adjacent obstacle as an end point, and if the vehicle can travel from the starting point to the end point at a constant speed or a reduced speed between the obstacles, determine that the vehicle can travel from the position of the vehicle passing through the first adjacent obstacle to the position of the vehicle passing through the second adjacent obstacle; determining that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if it may not travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance.
Further, the control module is further configured to, when an obstacle exists in the preset range in the current driving lane, obtain a position and a size of the obstacle, further obtain a passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane, and control the vehicle to change lanes and avoid the obstacle when the passing width of the obstacle is smaller than a second preset safe passing width.
Compared with the prior art, the system for avoiding the obstacle during the automatic driving of the vehicle and the method for avoiding the obstacle during the automatic driving of the vehicle have the same advantages, and the detailed description is omitted.
It is still another object of the present invention to provide a vehicle that can determine whether or not it is passable according to the position and size of an obstacle on the current travel road.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the obstacle avoidance system in automatic driving of the vehicle.
Compared with the prior art, the vehicle and the obstacle avoidance system during automatic driving of the vehicle have the same advantages, and are not described again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for avoiding obstacles during automatic driving of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a present invention in an embodiment of a current driving lane with two obstacles;
FIG. 3 is a schematic illustration of an obstacle in a current driving lane in accordance with an embodiment of the present invention;
fig. 4 is a block diagram of a system for avoiding obstacles during automatic driving of a vehicle according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a flowchart of a method for avoiding obstacles during automatic driving of a vehicle according to an embodiment of the present invention.
As shown in fig. 1, the method for avoiding obstacles during automatic driving of a vehicle according to an embodiment of the present invention includes the following steps:
s1: and providing a road environment model of a preset range near the vehicle, wherein the road environment model comprises lane positions and lane widths in the preset range near the vehicle, and the size and the position of the obstacle.
In an embodiment of the present invention, step S1 specifically includes: acquiring position information of a vehicle, the position and the size of an obstacle in a current driving lane, and lane position and lane width information in a preset range near the vehicle; and generating a road environment model according to the position information of the vehicle, the position and the size of the obstacle in the current driving lane, and the lane position and the lane width information in the preset range near the vehicle.
Specifically, an environment sensing system is arranged on the vehicle and replaces a driver sensing system to extract current running environment information such as roads, vehicle positions and sizes and positions of obstacles through different sensors. And screening, associating, tracking, filtering and other processing are carried out on the environment information so as to obtain more accurate information such as road information, object target position, size and the like, and finally a road environment model is generated. The road environment model outputs lane position and lane width information in a preset range (for example, 200 meters) in front of and behind the vehicle, and the size and position of all vehicles and obstacles in the range in real time.
S2: if a plurality of obstacles exist in the current driving lane within the preset range, acquiring the position and the size of a first adjacent obstacle, the position and the size of a second adjacent obstacle, the width of the current driving lane and the distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to the road environment model, and acquiring the speed of the vehicle. The first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle second closest to the vehicle in the driving direction of the current driving lane, namely the obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
Fig. 2 is a schematic diagram of two obstacles in the current driving lane according to an embodiment of the present invention. In one embodiment of the present invention, as shown in fig. 2, the barrier separation distance between a first adjacent barrier a and a second adjacent barrier B is L1.
S3: and judging whether the vehicle can avoid the first adjacent barrier and the second adjacent barrier to pass in the current driving lane according to the position and the size of the first adjacent barrier A, the position and the size of the second adjacent barrier B, the vehicle speed of the vehicle and the barrier distance L1.
In an embodiment of the present invention, step S3 specifically includes:
s3-1: the passing width D1 at the first adjacent obstacle a is obtained according to the position and size of the first adjacent obstacle a and the width of the current driving lane.
S3-2: if the passing width D1 at the first adjacent obstacle a is smaller than the first preset safe passing width, it is determined that the vehicle cannot pass in the current driving lane avoiding the first adjacent obstacle a and the second adjacent obstacle B. The first preset safe passing width is used for ensuring that the vehicle can safely pass through the road at the obstacle. Illustratively, the first preset safe passage width is 2.8m (the vehicle width is 2m, and the redundancy width threshold is 0.8 m).
S3-3: if the passing width D1 at the first adjacent obstacle a is greater than the first preset safe passing width, the passing width D2 at the second adjacent obstacle B is obtained according to the position, size and width of the current driving lane of the second adjacent obstacle B.
S3-4: if the passing width D2 at the second adjacent obstacle B is smaller than the first preset safe passing width, it is determined that the vehicle cannot pass in the current driving lane avoiding the first adjacent obstacle a and the second adjacent obstacle B.
S3-5: and if the passing width of the second adjacent barrier B is larger than the first preset safe passing width, acquiring the position of the vehicle passing through the first adjacent barrier A and the position of the vehicle passing through the second adjacent barrier B.
S3-6: it is determined whether the vehicle can travel from the vehicle position passing the first nearby obstacle a to the vehicle position passing the second nearby obstacle B based on the vehicle position passing the first nearby obstacle a, the vehicle position passing the second nearby obstacle B, the vehicle speed of the vehicle, and the obstacle interval L1.
In an embodiment of the present invention, step S3-6 specifically includes:
s3-6-1: and judging whether the vehicle can run at a constant speed or in a decelerated mode to the terminal from the starting point at the interval between the obstacles by taking the position of the vehicle passing through the first adjacent obstacle A as the starting point and the position of the vehicle passing through the second adjacent obstacle B as the terminal.
Specifically, if the first adjacent obstacle a and the second adjacent obstacle B are close to different sides of the left and right sides of the current driving road (as shown in fig. 2), at the boundary point of the first adjacent obstacle a in the driving direction, the center point of the vehicle-passable road (lane width D1) of the current lane is taken as the starting point. At the nearest point in the traveling direction of the second adjacent obstacle B, the intermediate point of the road (lane width D2) on which the vehicle can pass of the current lane is set as the end point.
If the first adjacent obstacle a and the second adjacent obstacle B are close to the same side on the left and right sides of the current driving road, the same is true at the boundary point of the first adjacent obstacle a in the driving direction, starting from the middle point of the vehicle-passable road (lane width D1) in the current lane, and ending at the closest point of the second adjacent obstacle B in the driving direction, at the middle point of the vehicle-passable road (lane width D2) in the current lane.
S3-6-2: it is determined that the vehicle can travel from a vehicle position passing a first nearby obstacle to a vehicle position passing a second nearby obstacle if the vehicle can travel at a constant speed or decelerated speed from the start point to the end point at the inter-obstacle distance.
When the first adjacent obstacle a and the second adjacent obstacle B are close to different sides of the left and right sides of the current driving road (as shown in fig. 2), it is determined whether the vehicle can drive from the starting point to the end point by controlling the wheel turning at the obstacle distance L1, while first controlling the vehicle speed to be constant. Next, when the deceleration of the vehicle is controlled, it is determined whether the vehicle can travel from the start point to the end point at the obstacle pitch L1 by controlling the wheel turning. That is, when the vehicle speed is not high or the obstacle distance L1 is large, the vehicle can travel from the start point to the end point while avoiding the first nearby obstacle a and the second nearby obstacle B.
When the first adjacent barrier A and the second adjacent barrier B are close to the same side of the left side and the right side of the current driving road, the vehicle can pass through the position with smaller passing width at the first adjacent barrier A and the second adjacent barrier B without considering the barrier distance L1.
S3-6-3: if it is not possible to travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance, it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
S3-7: if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle, it is determined that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle in the current lane of travel.
S4: and if the vehicle cannot avoid the first adjacent barrier and the second adjacent barrier in the current driving lane to pass, controlling the vehicle to change the lane and avoid the barrier.
In an embodiment of the present invention, after step S1, the method further includes:
and if the current driving lane has an obstacle in the preset range, acquiring the position and the size of the obstacle according to the road environment model, and acquiring the lane width of the current driving lane.
And obtaining the passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane. Fig. 3 is a schematic diagram of an obstacle in a current driving lane according to an embodiment of the present invention. As shown in fig. 3, when there is an obstacle M within the preset range, the passing width at the obstacle M is D3.
And if the passing width of the obstacle is smaller than the second preset safe passing width, controlling the vehicle to change the lane and avoid the obstacle. And if the passing width at the obstacle is larger than the second preset safe passing width, controlling the vehicle to pass by the obstacle in the current driving lane. The second preset safe passing width is used for ensuring that the vehicle can safely pass through the road at the obstacle. Illustratively, the second preset safe passage width is 2.8m (the vehicle width is 2m, and the redundancy width threshold is 0.8 m).
The method for avoiding the obstacle during the automatic driving of the vehicle comprises the steps of firstly generating a road environment model in a preset range near the vehicle, and providing lane lines of all lanes and the position size of an obstacle in a current driving lane on the road environment model. When a plurality of obstacles exist in the effective detection range of the current lane, judging whether the vehicle can avoid the two obstacles to pass in the current driving lane according to the passing width of the two obstacles closest to the vehicle, the distance between the two obstacles in the driving direction of the vehicle and the speed of the vehicle, and further controlling the vehicle to drive; when only one obstacle exists in the effective detection range of the current driving lane, whether the passing width of the obstacle can be used for the vehicle to avoid the obstacle or not is judged, and then the vehicle is controlled to drive.
Fig. 4 is a block diagram of a system for avoiding obstacles during automatic driving of a vehicle according to an embodiment of the present invention. As shown in fig. 4, the system for avoiding obstacles during automatic driving of a vehicle according to the embodiment of the present invention includes: a road environment model providing module 410 and a control module 420.
The road environment model providing module 410 is used for providing a road environment model of a preset range near the vehicle. The road environment model comprises lane positions and lane widths in a preset range near the vehicle, and the size and the position of an obstacle. The control module 420 is configured to, when knowing that a plurality of obstacles are present in a preset range in a current driving lane according to a road environment model, obtain a position and a size of a first adjacent obstacle, a position and a size of a second adjacent obstacle, a width of the current driving lane, and an obstacle distance between the first adjacent obstacle and the second adjacent obstacle in a driving direction of the current driving lane according to the road environment model, and obtain a vehicle speed of a vehicle, further judge whether the vehicle can avoid the first adjacent obstacle and the second adjacent obstacle in the current driving lane according to the position and the size of the first obstacle, the position and the size of the second obstacle, and the vehicle speed and the obstacle distance, and control the vehicle to change lanes to avoid the obstacles when the first adjacent obstacle and the second adjacent obstacle cannot be avoided in the current driving lane. The first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
In one embodiment of the present invention, the control module 420 is specifically configured to obtain a passing width at the first nearby obstacle according to the position and size of the first nearby obstacle and the width of the current driving lane; if the passing width of the first adjacent barrier is smaller than the first preset safe passing width, judging that the vehicle cannot avoid the first adjacent barrier and the second adjacent barrier to pass in the current driving lane; if the passing width of the first adjacent barrier is larger than the first preset safe passing width, obtaining the passing width of the second adjacent barrier according to the position and the size of the second adjacent barrier and the width of the current driving lane; if the passing width of the second adjacent barrier is smaller than the first preset safe passing width, judging that the vehicle cannot avoid the first adjacent barrier and the second adjacent barrier to pass in the current driving lane; if the passing width of the second adjacent barrier is larger than the first preset safe passing width, the position of the vehicle passing through the first adjacent barrier and the position of the vehicle passing through the second adjacent barrier are obtained; judging whether the vehicle can run from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance; if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle, it is determined that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle in the current lane of travel.
In an embodiment of the present invention, the control module 420 is further configured to determine whether the vehicle can travel from the starting point to the destination at a constant speed or a reduced speed between obstacles, with the position of the vehicle passing through the first adjacent obstacle as the starting point and the position of the vehicle passing through the second adjacent obstacle as the destination, and if the vehicle can travel from the starting point to the destination at a constant speed or a reduced speed between obstacles, determine that the vehicle can travel from the position of the vehicle passing through the first adjacent obstacle to the position of the vehicle passing through the second adjacent obstacle; if it is not possible to travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance, it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
In an embodiment of the present invention, the control module 420 is further configured to, when an obstacle exists in the current driving lane within the preset range, obtain a position and a size of the obstacle, further obtain a passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane, and control the vehicle to change lanes and avoid the obstacle when the passing width of the obstacle is smaller than a second preset safe passing width.
The system for avoiding the obstacle during the automatic driving of the vehicle firstly generates a road environment model in a preset range near the vehicle, and provides lane lines of all lanes and the position size of the obstacle in the current driving lane on the road environment model. When a plurality of obstacles exist in the effective detection range of the current lane, judging whether the vehicle can avoid the two obstacles to pass in the current driving lane according to the passing width of the two obstacles closest to the vehicle, the distance between the two obstacles in the driving direction of the vehicle and the speed of the vehicle, and further controlling the vehicle to drive; when only one obstacle exists in the effective detection range of the current driving lane, whether the passing width of the obstacle can be used for the vehicle to avoid the obstacle or not is judged, and then the vehicle is controlled to drive.
It should be noted that a specific implementation manner of the system for avoiding an obstacle during automatic driving of a vehicle in the embodiment of the present invention is similar to a specific implementation manner of the method for avoiding an obstacle during automatic driving of a vehicle in the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not described here in order to reduce redundancy.
Further, the embodiment of the invention discloses a vehicle, which is provided with the obstacle avoidance generating system in the automatic driving of the vehicle in any one of the embodiments. The vehicle can judge whether the vehicle can pass according to the position and the size of the obstacle of the current driving road.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for avoiding obstacles during automatic driving of a vehicle is characterized by comprising the following steps:
providing a road environment model of a preset range near a vehicle, wherein the road environment model comprises lane positions and lane widths in the preset range near the vehicle, and the size and position of an obstacle;
if a plurality of obstacles exist in the current driving lane in the preset range, acquiring the position and the size of a first adjacent obstacle, the position and the size of a second adjacent obstacle, the width of the current driving lane and the distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to the road environment model, and acquiring the speed of the vehicle;
judging whether the vehicle can pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane according to the position and the size of the first adjacent obstacle, the position and the size of the second adjacent obstacle, the speed of the vehicle and the distance between the obstacles;
if the vehicle cannot avoid the first adjacent barrier and the second adjacent barrier in the current driving lane to pass, controlling the vehicle to change the lane and avoid the barrier;
the first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
2. The method for avoiding obstacles during automatic driving of a vehicle according to claim 1, wherein the step of determining whether the vehicle can avoid the first nearby obstacle and the second nearby obstacle to pass through in the current driving lane according to the position and size of the first obstacle, the position and size of the second obstacle, the vehicle speed of the vehicle and the obstacle distance comprises:
obtaining the passing width of the first adjacent obstacle according to the position and the size of the first adjacent obstacle and the width of the current driving lane;
if the passing width at the first adjacent obstacle is smaller than a first preset safe passing width, determining that the vehicle cannot pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane;
if the passing width of the first adjacent barrier is larger than the first preset safe passing width, obtaining the passing width of the second adjacent barrier according to the position and the size of the second adjacent barrier and the width of the current driving lane;
determining that the vehicle cannot pass by avoiding the first and second adjacent obstacles in the current driving lane if the passing width at the second adjacent obstacle is smaller than the first preset safe passing width;
if the passing width of the second adjacent barrier is larger than the first preset safe passing width, acquiring the position of a vehicle passing through the first adjacent barrier and the position of a vehicle passing through the second adjacent barrier;
judging whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance;
determining that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle within the current driving lane if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
3. The method for avoiding obstacles during automatic driving of a vehicle according to claim 2, wherein the step of determining whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance comprises:
taking the position of the vehicle passing through the first adjacent obstacle as a starting point and the position of the vehicle passing through the second adjacent obstacle as an end point, and judging whether the vehicle can run at a constant speed or at a reduced speed to the end point from the starting point at the distance between the obstacles;
determining that the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if the vehicle can travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance;
determining that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if it may not travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance.
4. A method for avoiding obstacles during automatic driving of a vehicle according to claim 1, wherein after the step of providing a road environment model of a preset range near the vehicle, the method further comprises:
if an obstacle exists in the current driving lane in the preset range, acquiring the position and the size of the obstacle according to the road environment model, and acquiring the lane width of the current driving lane;
obtaining the passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane;
and if the passing width of the obstacle is smaller than a second preset safe passing width, controlling the vehicle to change the lane and avoid the obstacle.
5. The method for avoiding obstacles during automatic driving of a vehicle according to claim 1, wherein the step of providing the road environment model of the preset range near the vehicle specifically comprises:
acquiring position information of the vehicle, the position and the size of an obstacle in the current driving lane, and lane position and lane width information in a preset range near the vehicle;
and generating the road environment model according to the position information of the vehicle, the position and the size of the obstacle in the current driving lane, and the lane position and the lane width information in the preset range near the vehicle.
6. A system for avoiding obstacles during automatic driving of a vehicle is characterized by comprising:
the road environment model providing module is used for providing a road environment model of a preset range near a vehicle, and the road environment model comprises lane positions and lane widths in the preset range near the vehicle and the size and position of an obstacle;
a control module, configured to, when it is known that a plurality of obstacles exist in the preset range in the current driving lane according to the road environment model, obtain a position and a size of a first adjacent obstacle, a position and a size of a second adjacent obstacle, a width of the current driving lane, and an obstacle distance between the first adjacent obstacle and the second adjacent obstacle in the driving direction of the current driving lane according to the road environment model, obtain a vehicle speed of the vehicle, further determine whether the vehicle can avoid the first adjacent obstacle and the second obstacle in the current driving lane according to the position and the size of the first obstacle, the position and the size of the second obstacle, the vehicle speed of the vehicle, and the obstacle distance, and when it is not possible to avoid the first adjacent obstacle and the second adjacent obstacle in the current driving lane, controlling the vehicle to change the lane and avoid the obstacle;
the first adjacent obstacle is an obstacle closest to the vehicle in the driving direction of the current driving lane, and the second adjacent obstacle is an obstacle closest to the first adjacent obstacle in the driving direction of the current driving lane.
7. The system for avoiding obstacles during automatic driving of the vehicle as claimed in claim 6, wherein the control module is specifically configured to obtain a passing width at the first nearby obstacle according to the position and size of the first nearby obstacle and the width of the current driving lane;
if the passing width at the first adjacent obstacle is smaller than a first preset safe passing width, determining that the vehicle cannot pass by avoiding the first adjacent obstacle and the second adjacent obstacle in the current driving lane;
if the passing width of the first adjacent barrier is larger than the first preset safe passing width, obtaining the passing width of the second adjacent barrier according to the position and the size of the second adjacent barrier and the width of the current driving lane;
determining that the vehicle cannot pass by avoiding the first and second adjacent obstacles in the current driving lane if the passing width at the second adjacent obstacle is smaller than the first preset safe passing width;
if the passing width of the second adjacent barrier is larger than the first preset safe passing width, acquiring the position of a vehicle passing through the first adjacent barrier and the position of a vehicle passing through the second adjacent barrier;
judging whether the vehicle can travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle according to the vehicle position passing the first nearby obstacle, the vehicle position passing the second nearby obstacle, the vehicle speed of the vehicle and the obstacle distance;
determining that the vehicle may not pass by avoiding the first nearby obstacle and the second nearby obstacle within the current driving lane if it is determined that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle.
8. The system according to claim 7, wherein the control module is specifically configured to determine whether the vehicle can travel from the starting point to the destination at a constant speed or a decelerated speed between obstacles, with the position of the vehicle passing through the first adjacent obstacle as the starting point and the position of the vehicle passing through the second adjacent obstacle as the destination, and determine that the vehicle can travel from the position of the vehicle passing through the first adjacent obstacle to the position of the vehicle passing through the second adjacent obstacle, if the vehicle can travel from the starting point to the destination at a constant speed or a decelerated speed between obstacles; determining that the vehicle may not travel from the vehicle position passing the first nearby obstacle to the vehicle position passing the second nearby obstacle if it may not travel from the start point to the end point at a constant speed or deceleration at the inter-obstacle distance.
9. The system for avoiding obstacles during automatic driving of a vehicle as claimed in claim 6, wherein the control module is further configured to obtain a position and a size of an obstacle when the current driving lane has the obstacle within the preset range, further obtain a passing width of the obstacle according to the position and the size of the obstacle and the width of the current driving lane, and control the vehicle to change lanes and avoid the obstacle when the passing width of the obstacle is smaller than a second preset safe passing width.
10. A vehicle comprising a system for obstacle avoidance when the vehicle is automatically driven according to any one of claims 6 to 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811637022.3A CN110614992B (en) | 2018-12-29 | 2018-12-29 | Method and system for avoiding obstacle during automatic driving of vehicle and vehicle |
| EP19902179.1A EP3889721A4 (en) | 2018-12-29 | 2019-12-27 | Obstacle avoidance method and system during automatic driving of vehicle, and vehicle |
| PCT/CN2019/129278 WO2020135738A1 (en) | 2018-12-29 | 2019-12-27 | Obstacle avoidance method and system during automatic driving of vehicle, and vehicle |
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| CN201811637022.3A CN110614992B (en) | 2018-12-29 | 2018-12-29 | Method and system for avoiding obstacle during automatic driving of vehicle and vehicle |
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