Vehicle inertial sensor systems

• US 8,712,599 B1
• Filed: 02/22/2013
• Issued: 04/29/2014
• Est. Priority Date: 02/22/2013
• Status: Active Grant

• Current Assignee: Analog Devices International Unlimited Company (Analog Devices, Inc.)
• Original Assignee: Analog Devices Technology (Analog Devices, Inc.)
• Inventors: Westpfahl, Michael
• Primary Examiner(s): Tarcza, Thomas
• Assistant Examiner(s): Dunn, Alex C
• Application Number:
  US13/774,152
• Time in Patent Office: 431 Days
• Field of Search: 701/1
• US Class Current: 701/1
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value

Abstract

Integrated crash and vehicle movement sensing by use of distributed new multi-axis satellite sensors combines side and/or front/rear crash sensing with other applications requiring dynamic vehicle movement data like (but not limited to) roll and/or pitch detection as well as active suspension, head light beam leveling, etc. Depending on the required functionality, two or more satellite sensor modules are used, which measure multi-axis high-g and low-g acceleration, without needing any further sensor inputs like gyroscopes while achieving a high level of failsafe and redundancy.

Claims

1. A satellite sensor module for a vehicle sensor system, the satellite sensor module comprising:

a first wide-g horizontal acceleration sensor arranged for sensing accelerations for a first horizontal vehicle axis;

a vertical acceleration sensor arranged for sensing accelerations for a vertical vehicle axis; and

a local processor in communication with the sensors, the local processor configured to process acceleration information received from the sensor for at least one of vehicle crash, roll, pitch, or yaw detection.

2. A satellite sensor module according to claim 1, wherein the first wide-g horizontal acceleration sensor comprises separate high-g and low-g horizontal acceleration sensor elements.

3. A satellite sensor module according to claim 1, wherein the first wide-g horizontal acceleration sensor and the vertical acceleration sensor comprises a high-g horizontal acceleration sensor element and a combination low-g horizontal and vertical acceleration sensor element.

4. A satellite sensor module according to claim 1, further comprising a second wide-g horizontal acceleration sensor in communication with the local processor and arranged for sensing accelerations for a second horizontal vehicle axis normal to the first horizontal vehicle axis.

5. A satellite sensor module according to claim 4, wherein the first wide-g horizontal acceleration sensor comprises separate high-g and low-g horizontal acceleration sensor elements, and wherein the second wide-g horizontal acceleration sensor comprises separate high-g and low-g horizontal acceleration sensor elements.

6. A satellite sensor module according to claim 4, wherein the first and second wide-g horizontal acceleration sensors and the vertical acceleration sensor comprises:

a first high-g horizontal acceleration sensor element arranged for sensing accelerations for the first horizontal vehicle axis;

a second high-g horizontal acceleration sensor element arranged for sensing accelerations for the second horizontal vehicle axis; and

a three-axis low-g acceleration sensor element arranged for sensing accelerations for the first horizontal vehicle axis, the second horizontal vehicle axis, and the vertical axis.

7. A vehicle sensor system comprising:

a front satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle longitudinal axis;

a first side satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle lateral axis;

a second side satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for the vehicle lateral axis; and

a central processing unit in communication with the satellite sensor modules, the central processing unit configured to process acceleration information received from the satellite sensor modules for at least one of vehicle crash, roll, pitch, or yaw detection.

8. A vehicle sensor system according to claim 7, wherein the front satellite sensor module further comprises a second wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle lateral axis.

9. A vehicle sensor system according to claim 7, wherein each side satellite sensor module includes a second wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle longitudinal axis.

10. A vehicle comprising:

a front satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle longitudinal axis;

a first side satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle lateral axis;

a second side satellite sensor module including a wide-g horizontal acceleration sensor and a vertical acceleration sensor, the wide-g horizontal acceleration sensor arranged for sensing accelerations for the vehicle lateral axis; and

a central processing unit in communication with the satellite sensor modules, the central processing unit configured to process acceleration information received from the satellite sensor modules for at least one of vehicle crash, roll, pitch, or yaw detection, wherein;

the front satellite sensor module is placed toward the front of the vehicle; and

the side satellite sensor modules are placed opposite one another behind the front satellite sensor module and on opposite sides of the vehicle longitudinal axis.

11. A vehicle according to claim 10, wherein the front satellite sensor module further comprises a second wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle lateral axis.

12. A vehicle according to claim 10, wherein each side satellite sensor module includes a second wide-g horizontal acceleration sensor arranged for sensing accelerations for a vehicle longitudinal axis.

13. A vehicle according to claim 10, wherein the central processing unit is further configured to interface with at least one other vehicle system for an acceleration-based application.

14. A vehicle according to claim 13, wherein the at least one other vehicle system includes an airbag system.

15. A vehicle according to claim 13, wherein the at least one other vehicle system includes a rollover detection/mitigation system.

16. A vehicle according to claim 13, wherein the at least one other vehicle system includes a headlight beam leveling system.

17. A vehicle according to claim 13, wherein the at least one other vehicle system includes an active suspension system.

18. A vehicle according to claim 13, wherein the at least one other vehicle system includes a traction control system.