Methods and systems for blind spot monitoring with adaptive alert zone

• US 9,994,151 B2
• Filed: 04/12/2016
• Issued: 06/12/2018
• 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): King, Curtis
• Application Number:
  US15/096,400
• Publication Number:
  US 20170291545A1
• Time in Patent Office: 791 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: 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 with a blind spot sensor that monitors a blind spot alert area of a subject vehicle and generates an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle. A controller receives at least one of traffic sign data and GPS data, determines whether a current lane of the subject vehicle is merging or is going to merge with a second lane, and expands the blind spot alert area in response to determining that the current lane of the subject vehicle is merging or is going to merge with the second lane.

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 generates an alert when a secondary vehicle is detected within the blind spot alert area of the subject vehicle;

a controller that receives at least one of traffic sign data and GPS data, that determines whether a current lane of the subject vehicle is merging or is going to merge with a second lane, and that expands the blind spot alert area from an initial blind spot alert area having a first area to an expanded blind spot alert area having a second area in response to determining that the current lane of the subject vehicle is merging or is going to merge with the second lane, the second area being greater than the first area.

2. The system of claim 1, further comprising:

a traffic sign recognition system that detects a traffic sign with a camera of the subject vehicle, that determines whether the traffic sign indicates a traffic merge, and that outputs the traffic sign data based on whether the traffic sign indicates the traffic merge;

wherein the controller receives the traffic sign data from the traffic sign recognition system and determines whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the traffic sign data.

3. The system of claim 2, wherein the camera generates image data corresponding to the traffic sign and wherein the traffic sign recognition system analyzes the image data to determine whether the traffic sign indicates the traffic merge.

4. The system of claim 1, further comprising:

a global positioning system that determines a location of the subject vehicle and that receives map data for the location of the subject vehicle;

wherein the controller receives the map data and the location of the subject vehicle and determines whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the GPS data.

5. The system of claim 4, wherein the controller analyzes the location of the subject vehicle and the map data for the location of the subject vehicle, determines a trajectory path of the subject vehicle, and determines whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the trajectory path of the subject 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. The system of claim 1, wherein the expanded blind spot alert area includes all of the initial blind spot alert area.

10. 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;

receiving, with a controller, at least one of traffic sign data and GPS data;

determining, with the controller, whether a current lane of the subject vehicle is merging or is going to merge with a second lane;

expanding, with the controller, the blind spot alert area from an initial blind spot alert area having a first area to an expanded blind spot alert area having a second area in response to determining that the current lane of the subject vehicle is merging or is going to merge with the second lane, the second area being greater than the first area.

11. The method of claim 10, further comprising:

detecting, with a traffic sign recognition system, a traffic sign using a camera of the subject vehicle;

determining, with the traffic sign recognition system, whether the traffic sign indicates a traffic merge;

outputting, with the traffic sign recognition system, the traffic sign data indicating whether the traffic sign indicates the traffic merge;

wherein the controller receives the traffic sign data from the traffic sign recognition system and determines whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the traffic sign data.

12. The method of claim 11, further comprising:

generating, with the camera, image data corresponding to the traffic sign; and

analyzing, with the traffic sign recognition system, the image data to determine whether the traffic sign indicates the traffic merge.

13. The method of claim 10, further comprising:

determining, with a global positioning system, a location of the subject vehicle; and

receiving, with the global positioning system, map data for the location of the subject vehicle;

wherein the controller receives the map data and the location of the subject vehicle and determines whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the GPS data.

14. The method of claim 13, further comprising:

analyzing, with the controller, the location of the subject vehicle and the map data for the location of the subject vehicle;

determining, with the controller, a trajectory path of the subject vehicle; and

determining, with the controller, whether the current lane of the subject vehicle is merging or is going to merge with the second lane based on the trajectory path of the subject vehicle.

15. The method of claim 10 wherein the blind spot sensor includes at least one of a radar sensor, a camera, and an ultrasonic sensor.

16. The method of claim 10, wherein generating the alert includes generating at least one of a visual alert, an audible alert, and a haptic alert to a driver of the subject vehicle.

17. The method of claim 10, wherein the alert indicates a location of the secondary vehicle relative to the subject vehicle.

18. The method of claim 10, wherein the expanded blind spot alert area includes all of the initial blind spot alert area.