System for avoiding collision with multiple moving bodies

• US 10,262,534 B2
• Filed: 01/14/2015
• Issued: 04/16/2019
• Est. Priority Date: 03/10/2014
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Okada, Takashi, Ueyama, Mikio
• Primary Examiner(s): Nolan, Peter D
• Assistant Examiner(s): Kong, Sze-Hon
• Application Number:
  US15/111,198
• Publication Number:
  US 20160335892A1
• Time in Patent Office: 1,553 Days
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 7/042 by electrical means, e.g. using travel or force sensors
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 2050/143 Alarm means
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2420/408 Radar; Laser, e.g. lidar
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2554/4026 Cycles
• CPC Class Codes: B60W 2554/4029 Pedestrians
• CPC Class Codes: B60W 2554/801 Lateral distance
• CPC Class Codes: B60W 2554/802 Longitudinal distance
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 30/08 Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
• CPC Class Codes: B60W 30/09 Taking automatic action to avoid collision, e.g. braking and steering
• CPC Class Codes: B60W 30/095 Predicting travel path or likelihood of collision
• CPC Class Codes: B60W 30/0956 : the prediction being responsive to traffic or environmental parameters
• CPC Class Codes: B60W 30/18145 : Cornering
• CPC Class Codes: B60W 40/06 : Road conditions
• CPC Class Codes: B60W 50/14 : Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: G08G 1/01 : Detecting movement of traffic to be counted or controlled G08G1/07 - G08G1/14 take precedence
• CPC Class Codes: G08G 1/048 : with provision for compensation of environmental or other condition, e.g. snow, vehicle stopped at detector
• CPC Class Codes: G08G 1/096725 : where the received information generates an automatic action on the vehicle control
• CPC Class Codes: G08G 1/123 : indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, tramstransmission of navigation instructions to vehicles G08G1/0968
• CPC Class Codes: G08G 1/164 : Centralised systems, e.g. external to vehicles
• CPC Class Codes: G08G 1/166 : for active traffic, e.g. moving vehicles, pedestrians, bikes

Abstract

When turning right (left) at an intersection and crossing an oncoming vehicle lane, this system makes it possible to avoid blocking travel of or colliding with a moving body moving in the oncoming vehicle lane due to stopping in the oncoming vehicle lane, and to avoid colliding with a moving body after crossing the oncoming vehicle lane. Given two or more moving bodies present in the advancement direction on the path of the local vehicle, the external environment is detected before the local vehicle intersects with the path of a first moving body, which will first intersect the local vehicle path; if at least two moving bodies are detected, i.e., the first moving body and a second moving body which has a path in which the position of intersection with the path of the local vehicle is further than the position of intersection between the path of the local vehicle and the path of the first moving body, then a first intersection time, at which the first position of intersection between the planned path of the local vehicle and the predicted path of the first moving body is reached, and a second intersection time, at which a second position of intersection between the planned path of the local vehicle and the predicted path of the second moving body is reached, are calculated, and on the basis of the difference between the first intersection time and the second intersection time, the deceleration relative to the first moving body and the second moving body is changed.

Claims

1. An apparatus comprising:

a vehicle controller that is configured to

detect an external environment before a local vehicle intersects with a path of a first moving vehicle firstly intersecting with a travel path of the local vehicle,

when detecting at least two moving bodies, that is, the first moving vehicle and a pedestrian having a path in which a position intersecting with the travel path of the local vehicle is farther than a position where the path of the first moving vehicle intersects with the travel path of the local vehicle,

obtain a first predicted intersection time at which the first moving vehicle arrives at a first intersection position where the travel path of the local vehicle intersects with the path of the first moving vehicle, and a second predicted intersection time at which the pedestrian arrives at a second intersection position where the travel path of the local vehicle intersects with a path of the pedestrian,

a deceleration of the local vehicle is changeable by the vehicle controller, and

the vehicle controller changes the deceleration of the local vehicle based on a difference between the predicted second intersection time and the predicted first intersection time.

2. The apparatus according to claim 1, wherein when the second intersection time is larger than a value obtained by adding a predetermined margin time to the first intersection time, the vehicle controller outputs an alarm at a time when a position of the local vehicle is at a position ahead of the first intersection position.

3. The apparatus according to claim 1, wherein when the second intersection time is larger than a value obtained by adding a predetermined margin time to the first intersection time, the vehicle controller sets deceleration of the local vehicle at a position ahead of the first intersection position to be larger than that in case where the second intersection time is smaller than the value obtained by adding the predetermined margin time to the first intersection time.

4. The apparatus according to claim 3, wherein the predetermined margin time is equal to or more than a total sum of a movement time of the first moving vehicle at which the local vehicle detects a collision possibility with the first moving vehicle but it is safe even without deceleration when the local vehicle crosses in front of the traveling first moving vehicle, and a movement time of the pedestrian at which the pedestrian is not affected by the crossing local vehicle when the local vehicle crosses after the pedestrian travels.

5. The apparatus according to claim 3, wherein the predetermined margin time is set to 2 to 3 seconds.

6. The apparatus according to claim 1, wherein when the second intersection time is larger than a value obtained by adding a predetermined margin time to the first intersection time, the vehicle controller stops the local vehicle at a position ahead of the first intersection position.

7. The apparatus according to claim 1, wherein when the second intersection time is larger than a value obtained by adding a predetermined margin time to the first intersection time, the vehicle controller outputs an alarm when the local vehicle is at a position ahead of the first intersection position, and sets deceleration of the local vehicle at a position ahead of the first intersection position to be larger than that in a case where the second intersection time is smaller than the value obtained by adding the predetermined margin time to the first intersection time.

8. The apparatus according to claim 1, comprising:

a manual operation change determination controller which detects whether a driver of the local vehicle changes an operation of the local vehicle, wherein, when the manual operation change determination controller detects that the driver changes the operation, a control operation of the vehicle controller is released.

9. The apparatus according to claim 1, comprising:

a manual operation change determination controller which detects whether a driver of the local vehicle changes an operation of the local vehicle, wherein, when the manual operation change determination controller detects that the driver changes the operation, a control operation of the vehicle controller is released by a release pattern which is set by a release pattern setting controller.

10. The apparatus according to claim 9, wherein, in a case where any one of an amount of change in steering angle, an amount of change in depressing brake pedal, an amount of change in accelerator opening, an amount of change in yaw rate, and an amount of change in lateral acceleration of the local vehicle is larger than a predetermined value set in advance, the manual operation change determination controller determines that the driver changes the operation of the local vehicle.

11. The apparatus according to claim 10, wherein, when the manual operation change determination controller determines that the driver changes the operation of the local vehicle, the release pattern setting controller releases a control operation of the vehicle controller by taking a predetermined time.