Driving assistance method and system with haptic notification seat

• US 20050174223A1
• Filed: 02/02/2005
• Published: 08/11/2005
• Est. Priority Date: 02/09/2004
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Egami, Masahiro, Hijikata, Shunsuke
• Granted Patent: US 7,327,234 B2
• Time in Patent Office: Days
• US Class Current: 340/440
• CPC Class Codes: B60N 2/0224 Non-manual adjustments, e.g. with electrical operation
• CPC Class Codes: B60N 2002/981 Warning systems, e.g. the seat or seat parts vibrates to warn the passenger when facing a danger
• CPC Class Codes: B62D 15/029 Steering assistants using warnings or proposing actions to the driver without influencing the steering system

Abstract

A driving assistance system and method for providing driving condition information to a driver via a seat with a haptic signal. A set of state signals of the vehicle with respect to a lane on the road is generated. The set of state signals include at least a lateral position signal that indicates a lateral positional relationship of the vehicle with respect to the lane and a heading angle signal that indicates a heading angle of the vehicle with respect to the lane. A haptic signal is generated based on the set of state signals to convey information regarding the lateral positional relationship of the vehicle with respect to the lane and the heading angle of the vehicle with respect to the lane.

Claims

1. A system for providing driving condition information to a driver of a vehicle occupying a driver seat, the system comprising:

a sensor configured to detect a lateral position of the vehicle and a heading angle of the vehicle; and

a haptic signal generator configured to generate a haptic signal from the seat based on the lateral position and the heading angle of the vehicle.

2. The system of claim 1, wherein the haptic signal generator is configured to perform the steps of:

determining a first weight for the lateral position and a second weight for the heading angle;

calculating a potential risk based on the first weight, the second weight, the lateral position signal and the heading angle signal; and

generating the haptic signal based on the calculated potential risk.

3. The system of claim 2, wherein:

the sensor is configured to further detect a lane curvature signal that indicates a curvature of a lane on which the vehicle is being driven; and

the haptic signal generator determines the first weight and the second weight based on the lateral position, the heading angle and the lane curvature.

4. The system of claim 2, wherein the second weight increases as the vehicle approaches a lane boundary of a lane on which the vehicle is being driven.

5. The system of claim 2, wherein responsive to the heading angle representing that the vehicle deviates from a determined centerline of a lane on which the vehicle is being driven, the second weight increases as the vehicle approaches a lane boundary of the lane.

6. The system of claim 3, wherein responsive to the lane curvature signal representing that the lane is curved, the second weight corresponding to a vehicle traveling towards an outer boundary of the lane and away from a determined centerline of the lane has a greater value than the second weight corresponding to a vehicle traveling away from the outer lane boundary and towards the determined centerline of the lane.

7. The system of claim 3, wherein responsive to the lane curvature signal representing that the lane is curved, the first weight increases as the vehicle approaches an outer boundary of the lane.

8. The system of claim 3, wherein responsive to the lane curvature signal representing that the lane is curved, the first weight increases as the curvature of the lane increases.

9. The system of claim 2, wherein:

the haptic signal includes a first haptic signal and a second haptic signal; and

the haptic signal generator is configured to apply a first haptic signal to the driver from a first portion of the seat in response to the potential risk having a positive value, and to apply the second haptic signal to the driver from a second portion of the seat in response to the potential risk having a negative value.

10. The system of claim 2, wherein:

the sensor is further configured to detect a vehicle speed and a lane curvature signal that indicates a curvature of a lane on which the vehicle is being driven; and

the haptic signal generator determines the first weight and the second weight based on the lateral position, the heading angle, the lane curvature, and the vehicle speed.

11. The system of claim 3, wherein the first weight and the second weight change with the curvature of the lane.

12. A vehicle comprising:

a seat configured to be occupied by a driver operating the vehicle;

a sensor configured to detect a lateral position of the vehicle and a heading angle of the vehicle; and

a haptic signal generator configured to generate a haptic signal from the seat based on the lateral position and the heading angle of the vehicle.

13. A method for providing driving condition information to a driver of a vehicle occupying a driver seat, the method comprising the steps of:

detecting a lateral position of the vehicle and a heading angle of the vehicle; and

generating a haptic signal from the seat based on the lateral position of the vehicle and the heading angle of the vehicle.

14. The method of claim 13, wherein the generating step modifies a contour of the seat based on the lateral position and the heading angle of the vehicle.

15. The method as claimed in claim 13, wherein:

the detecting step further detects a lane curvature signal that indicates a curvature of a lane on which the vehicle is being driven; and

the generating step includes the steps of;

determining a first weight for the lateral position and a second weight for the heading angle; and

calculating a potential risk based on the first weight, the second weight, the lateral position and the heading angle.

16. The method as claimed in claim 15, wherein the first weight increases as the vehicle approaches a lane boundary of the lane.

17. The method as claimed in claim 15, wherein responsive to the heading angle representing that the vehicle deviates from a determined centerline line of the lane, the second weight increases as the vehicle approaches a lane boundary of the lane.

18. The method as claimed in claim 15, wherein responsive the curvature representing that the lane is curved, the second weight corresponding to the vehicle traveling towards an outer boundary of the lane and away from a determined centerline of the lane has a greater value than the second weight corresponding to the vehicle traveling away from the outer lane boundary and towards the determined centerline of the lane.

19. The method as claimed in claim 15, wherein responsive to the lane curvature signal representing that the lane is curved, the first weight increases as the vehicle approaches an outer boundary of the lane.

20. The method as claimed in claim 15, wherein the first weight and the second weight change with the curvature of the lane.

21. A system for providing driving condition information to a driver of a vehicle occupying a driver seat, the system comprising:

means for detecting a lateral position of the vehicle and a heading angle of the vehicle; and

means for generating a haptic signal from the seat based on the lateral position and the heading angle of the vehicle.