Methods and systems for blind spot monitoring with adaptive alert zone

• US 9,975,480 B2
• Filed: 04/12/2016
• Issued: 05/22/2018
• Est. Priority Date: 04/12/2016
• Status: Active Grant

• Current Assignee: DENSO Corporation, Denso International America Incorporated (DENSO Corporation)
• Original Assignee: DENSO Corporation, Denso International America Incorporated (DENSO Corporation)
• Inventors: Lai, Ting-Yu, Sato, Miki, Sun, Bo
• Primary Examiner(s): Zimmerman, Brian
• Assistant Examiner(s): Lau, Kevin
• Application Number:
  US15/096,437
• Publication Number:
  US 20170291547A1
• Time in Patent Office: 770 Days
• Field of Search: None
• CPC Class Codes: B60Q 9/008 for anti-collision purposes
• CPC Class Codes: G06V 20/58 Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
• CPC Class Codes: G06V 20/582 of traffic signs
• CPC Class Codes: G06V 20/588 Recognition of the road, e.g. of lane markings; Recognition of the vehicle driving pattern in relation to the road
• CPC Class Codes: G08G 1/09623 Systems involving the acquisition of information from passive traffic signs by means mounted on the vehicle G08G1/0967 takes precedence
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes
• CPC Class Codes: G08G 1/167 Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Abstract

A system and method are provided and include a blind spot monitoring system including a blind spot sensor that monitors a blind spot alert area of a subject vehicle and that generates an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle. An object detection system detects an adjacent vehicle traveling in an adjacent lane to the subject vehicle. A controller determines whether the subject vehicle has passed the adjacent vehicle and that expands the blind spot alert area in response to determining that the subject vehicle has passed the adjacent vehicle.

Claims

1. A system comprising:

a blind spot monitoring system including a blind spot sensor that monitors a blind spot alert area of a subject vehicle and that generates an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle;

an object detection system that detects an adjacent vehicle traveling in an adjacent lane to the subject vehicle;

a controller that determines whether the subject vehicle has passed the adjacent vehicle and that expands the blind spot alert area in a width direction of the subject vehicle into a far lane in response to determining that the subject vehicle has passed the adjacent vehicle, the far lane being on an opposite side of the adjacent lane from the subject vehicle and adjacent to the adjacent lane.

2. The system of claim 1, wherein at least one of the object detection system and the controller determines a length of the adjacent vehicle and wherein the controller expands the blind spot alert area in response to the length being greater than a predetermined threshold, in addition to determining that the subject vehicle has passed the adjacent vehicle.

3. The system of claim 1, wherein the object detection system detects the adjacent vehicle with a camera of the subject vehicle.

4. The system of claim 3, wherein the object detection system receives image data from the camera and analyzes the image data to detect the adjacent vehicle positioned in the adjacent lane.

5. The system of claim 1, wherein the blind spot detection system detects the secondary vehicle entering the adjacent lane after the subject vehicle has passed the adjacent vehicle.

6. The system of claim 1 wherein the blind spot sensor includes at least one of a radar sensor, a camera, and an ultrasonic sensor.

7. The system of claim 1, wherein the alert includes at least one of a visual alert, an audible alert, and a haptic alert to a driver of the subject vehicle.

8. The system of claim 1, wherein the alert indicates a location of the secondary vehicle relative to the subject vehicle.

9. A method comprising:

monitoring a blind spot alert area of a subject vehicle with a blind spot monitoring system including a blind spot sensor;

generating, with the blind spot monitoring system, an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle;

detecting, with an object detection system, an adjacent vehicle traveling in an adjacent lane to the subject vehicle;

determining, with a controller, whether the subject vehicle has passed the adjacent vehicle; and

expanding, with the controller, the blind spot alert area in a width direction of the subject vehicle into a far lane in response to determining that the subject vehicle has passed the adjacent vehicle, the far lane being on an opposite side of the adjacent lane from the subject vehicle and adjacent to the adjacent lane.

10. The method of claim 9, further comprising:

determining, with at least one of the object detection system and the controller, a length of the adjacent vehicle;

wherein the controller expands the blind spot alert area in response to the length being greater than a predetermined threshold, in addition to determining that the subject vehicle has passed the adjacent vehicle.

11. The method of claim 9, wherein the object detection system detects the adjacent vehicle with a camera of the subject vehicle.

12. The method of claim 11, further comprising:

receiving image data from the camera with the object detection system; and

analyzing, with the object detection system, the image data to detect the adjacent vehicle positioned in the adjacent lane.

13. The method of claim 9, wherein the blind spot detection system detects the secondary vehicle entering the adjacent lane after the subject vehicle has passed the adjacent vehicle.

14. The method of claim 9 wherein the blind spot sensor includes at least one of a radar sensor, a camera, and an ultrasonic sensor.

15. The method of claim 9, wherein the alert includes at least one of a visual alert, an audible alert, and a haptic alert to a driver of the subject vehicle.

16. The method of claim 9, wherein the alert indicates a location of the secondary vehicle relative to the subject vehicle.

17. A system comprising:

a blind spot monitoring system including a blind spot sensor that monitors a blind spot alert area of a subject vehicle and that generates an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle;

an object detection system that detects an adjacent vehicle traveling in an adjacent lane to the subject vehicle with a camera of the subject vehicle and that determines a length of the adjacent vehicle; and

a controller that determines whether the length of the adjacent vehicle is greater than a predetermined threshold, that determines whether the subject vehicle has passed the adjacent vehicle, and that expands the blind spot alert area in a width direction of the subject vehicle into a far lane in response to determining that the length of the adjacent vehicle is greater than the predetermined threshold and that the subject vehicle has passed the adjacent vehicle, the far lane being on an opposite side of the adjacent lane from the subject vehicle and adjacent to the adjacent lane.

18. The system of claim 17 wherein the blind spot sensor includes at least one of a radar sensor, a camera, and an ultrasonic sensor.

19. The system of claim 17, wherein the alert includes at least one of a visual alert, an audible alert, and a haptic alert to a driver of the subject vehicle.

20. The system of claim 17, wherein the alert indicates a location of the secondary vehicle relative to the subject vehicle.