Remote sensor network system with redundancy

• US 7,443,310 B2
• Filed: 11/23/2005
• Issued: 10/28/2008
• Est. Priority Date: 11/23/2005
• Status: Active Grant

• Current Assignee: Veoneer, Inc. (SSW Partners LP)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Eiswerth, David, Boran, Colm, Senyk, Myron
• Primary Examiner(s): Bugg; George A
• Assistant Examiner(s): Lau; Hoi C
• Application Number:
  US11/287,134
• Publication Number:
  US 20070115103A1
• Time in Patent Office: 1,070 Days
• Field of Search: 340/635, 340/657, 340/660, 340/661, 340/662, 340/663, 340533-538, 340/509, 340/506, 340/517, 340/518, 307 1- 8, 324/600, 324/691
• US Class Current: 340/660
• CPC Class Codes: B60R 2021/01068 between different sensors and airbag control unit
• CPC Class Codes: B60R 2021/01115 specific data frames
• CPC Class Codes: B60R 21/01 Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents electrical circuits for transmission of signals between steering wheel and the vehicle itself B60R16/027; for electrically actuating belt retractor locking means B60R22/343

Abstract

A multi-sensor network having a plurality of receivers and sensors connected to a common communication line is provided. A controller will activate one of the plurality of receivers, thereby allowing one of the plurality of sensors to transmit data to the communication line. The plurality of sensors each individually have a logic device preventing more than one sensor from transmitting data in a given time interval.

Claims

1. A motor vehicle sensor system comprising:

a communication line;

a plurality of receivers connected to the communication line, each of the plurality of receivers having a variable voltage regulator configured to selectively provide a current to the communication line, one of the receivers being configured to provide a synchronization pulse to the communication line;

a plurality of sensors connected to a communication line, each of the plurality of sensors having a logic device configured to prevent more than one of the plurality of sensors from communicating with the communication line simultaneously based on the synchronization pulse; and

a controller connected to the plurality of receivers and configured to adjust the variable voltage regulators when one of the plurality of sensors is communicating with the communication line, such that one of the variable voltage regulators produces a voltage greater than the other variable voltage regulators, whereby the variable voltage regulator with the greater voltage provides the current to the communication line.

2. The system of claim 1, wherein the plurality of receivers individually include a current sensing device, whereby the current sensing device is configured to determine the amount of current provided by the receiver to the communication line.

3. The system of claim 2, further comprising a current-to-voltage converter connected to the current sensing device and configured to determine a voltage based on the amount of current provided by the receiver to the communication line and output the voltage base on a current amount.

4. The system of claim 1, wherein the plurality of sensors are current modulated sensors.

5. The system of claim 4 wherein the current modulated sensors are acceleration sensors.

6. The system of claim 4, wherein the current modulated sensors are deformation sensors.

7. The system of claim 4, wherein the current modulated sensors are pressure sensors.

8. A sensor system for a motor vehicle comprising:

a communication line;

a plurality of receivers connected to the communication line, each of the plurality of receivers having a variable voltage regulator configured to selectively provide a current to the communication line, one of the receivers is configured to provide a synchronization pulse to the communication line;

a current sensing device configured to determine the amount of current provided by the variable voltage regulator to the communication line;

a current-to-voltage converter connected to the current sensing device and configured to determine a voltage based on the amount of current provided by the variable voltage regulator to the communication line and output the voltage based on the current amount;

a plurality of sensors connected to a communication line, the plurality of sensors individually having a logic device configured to prevent more than one of the plurality of sensors from communicating with the communication line simultaneously based on the synchronization pulse; and

a controller connected to the plurality of receivers and configured to adjust the variable voltage regulators when one of the plurality of sensors is communicating with the communication line, such that one of the variable voltage regulators produces a voltage greater than the other variable voltage regulators, whereby the variable voltage regulator with the greater voltage provides the current to the communication line.

9. The system of claim the 8, wherein the plurality of sensors are current modulated sensors.

10. The system of claim 8, wherein the current modulated sensors are acceleration sensors.

11. The system of claim 8, wherein the current modulated sensors are deformation sensors.