Enhanced vision road detection system

• US 7,898,400 B2
• Filed: 04/15/2008
• Issued: 03/01/2011
• Est. Priority Date: 04/15/2008
• Status: Active Grant

• Current Assignee: Arriver Software LLC
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Hadi, Salah, Decker, Stephen
• Primary Examiner(s): Previl; Daniel
• Application Number:
  US12/103,630
• Publication Number:
  US 20090256692A1
• Time in Patent Office: 1,050 Days
• Field of Search: 340/435, 340436-439, 340/441, 340446-448, 340460-466, 340/467, 340474-475
• US Class Current: 340/435
• CPC Class Codes: B60Q 5/00 Arrangement or adaptation of acoustic signal devices
• CPC Class Codes: B60Q 9/008 for anti-collision purposes
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 2520/16 Pitch
• CPC Class Codes: B60W 2520/18 Roll
• CPC Class Codes: B60W 2552/30 Road curve radius
• CPC Class Codes: B60W 30/12 Lane keeping
• CPC Class Codes: B60W 50/08 Interaction between the driver and the control system
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention

Abstract

A system for determining when a vehicle is departing from the current lane. The system includes a processor, an imaging sensor, and an inertial sensor assembly. The imaging sensor is in electrical communication with the processor to provide a vehicle position signal and a preceding lane structure. The inertial sensor assembly is in electrical communication with processor to provide acceleration and rotational information about the vehicle. Based on a combination of the vehicle position, the preceding lane structure, the acceleration information, and the rotational information, the processor generates a warning signal to alert the driver.

Claims

1. A system for detecting departure of a vehicle from a lane on a road, the system comprising:

a processor;

an imaging sensor in electrical communication with the processor, the imaging sensor generating a vehicle position signal corresponding to the vehicle position relative to the lane and a preceding lane structure corresponding to a direction of the lane in front of the vehicle;

an inertial sensor assembly in electrical communication with the processor, the inertial sensor assembly generating a yaw signal and roll signal corresponding to a yaw angle and roll angle of the vehicle, the inertial sensor assembly generating a lateral acceleration signal corresponding to a lateral acceleration of the vehicle;

wherein the lateral acceleration signal, the yaw signal and the roll signal from the inertial sensor assembly are used in conjunction with preceding lane structure information from the imaging sensor to predict departure from the lane.

2. The system according to claim 1, wherein the inertial sensor assembly generates a longitudinal acceleration signal corresponding to a longitudinal acceleration of the vehicle.

3. The system according to claim 2, wherein the inertial sensor assembly comprises a plurality of accelerometers configured to generate the yaw signal, the roll signal, the longitudinal acceleration signal, and the lateral acceleration signal.

4. The system according to claim 1, wherein the processor is configured to generate a warning signal to alert a vehicle driver when a lane departure is detected.

5. The system according to claim 4, further comprising a speaker wherein the warning signal is provided to the speaker to generate an audible alert.

6. The system according to claim 4, further comprising a display wherein the warning signal is provided to the display to generate a visual alert.

7. The system according to claim 1, wherein the processor generates a vehicle dynamics status based on the yaw signal, the roll signal, the longitudinal acceleration signal, and the lateral acceleration signal.

8. The system according to claim 7, wherein the inertial sensor assembly generates a vertical acceleration signal and the processor generates the vehicle dynamics status based on the vertical acceleration signal.

9. The system according to claim 8, wherein the inertial sensor assembly generates a pitch signal and the processor generates the vehicle dynamics status based on the pitch signal.

10. The system according to claim 7, wherein the processor compares the preceding lane structure to the vehicle dynamics to predict a hazardous vehicle motion status.

11. The system according to claim 10, wherein the processor generates a predicted vehicle motion alert based on the hazardous vehicle motion status.

12. The system according to claim 10, wherein the processor controls a vehicle safety system based on the hazardous vehicle motion status predicted.

13. The system according to claim 7, wherein the processor determines a lane curvature based on the preceding lane structure.

14. The system according to claim 13, wherein the processor compares the lane curvature to the vehicle dynamics to predict a hazardous vehicle motion status.

15. The system according to claim 14, wherein the processor generates a predicted vehicle motion alert based on the hazardous vehicle motion status.

16. The system according to claim 14, wherein the processor controls a vehicle safety system based on the hazardous vehicle motion status predicted.

17. The system according to claim 1, wherein the processor tightens seat belts by activating an electric pre-tensioner in response to a predicted lane departure based the longitudinal acceleration signal, the lateral acceleration signal, the yaw signal and the roll signal from the inertial sensor assembly and the preceding lane structure information from the imaging sensor.

23. The system according to claim 17, wherein the processor tightens seat belts by activating an electric pre-tensioner in response to a predicted lane departure based the longitudinal acceleration signal, the lateral acceleration signal, the vertical acceleration signal, the yaw signal and the roll signal from the inertial sensor assembly and the preceding lane structure information from the imaging sensor.

18. A system for detecting departure of a vehicle from a lane on a road, the system comprising:

a processor;

an imaging sensor in electrical communication with the processor, the imaging sensor generating a vehicle position signal corresponding to the vehicle position relative to the lane and a preceding lane curvature corresponding to the lane in front of the vehicle;

an inertial sensor assembly in electrical communication with the processor, the inertial sensor assembly generating a yaw signal, roll signal, and a pitch signal corresponding respectively to a yaw angle, roll angle, and pitch angle of the vehicle, the inertial sensor assembly generating a lateral acceleration signal, longitudinal acceleration signal, and a vertical acceleration signal corresponding respectively to a lateral acceleration, longitudinal acceleration, and vertical acceleration of the vehicle;

wherein the longitudinal acceleration signal, the lateral acceleration signal, the vertical acceleration, the yaw signal and the roll signal from the inertial sensor assembly are used in conjunction with preceding lane structure information from the imaging sensor to predict departure from the lane.

19. The system according to claim 18, wherein the processor compares the lane curvature to a vehicle dynamics status to predict a hazardous vehicle motion status.

20. The system according to claim 19, wherein the processor generates a predicted vehicle motion alert based on the hazardous vehicle motion status.

21. The system according to claim 19, wherein the processor controls a vehicle safety system based on the hazardous vehicle motion status predicted.

22. The system according to claim 18, wherein the inertial sensor assembly comprises a plurality of accelerometers configured to generate the yaw signal, the roll signal, the pitch signal, the longitudinal acceleration signal, the lateral acceleration signal, and the vertical acceleration signal.