Tire condition sensor communication with tire location provided via vehicle-mounted identification units

• US 6,441,728 B1
• Filed: 01/02/2001
• Issued: 08/27/2002
• Est. Priority Date: 01/02/2001
• Status: Expired due to Fees

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation)
• Inventors: Dixit, Rahul, DeZorzi, Timothy
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US09/753,290
• Publication Number:
  US 20020084896A1
• Time in Patent Office: 602 Days
• Field of Search: 340/442, 340/445, 340/447, 340/448, 340/10.3, 340/10.4, 340/10.1, 731/465, 200/61.22, 200/61.23, 267/64.11, 267/64.27, 267/64.28
• US Class Current: 340/447
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol

Abstract

A tire condition communication system (10) for a vehicle (12) that has a tire (e.g., 14A). A sensor (e.g., 74), associated with the tire (e.g., 14A), senses at least one tire condition. A memory (e.g., 70), associated with the tire (e.g., 14A), holds an identification. Transmitter components (e.g., 80 and 22), associated with the tire (e.g., 14A) and operatively connected to the sensor (74) and the memory (70), transmit a condition signal (e.g., 24A) that indicates the held identification and the sensed tire condition. A vehicle-based unit (28) receives the transmitted condition signal (e.g., 24A) indicative of the held identification and the sensed tire condition. An identification provision unit (e.g., 42A), located on the vehicle (12) adjacent to the tire (e.g., 14A) and having a location identification, transmits the location identification in response to a request. A communication portion (e.g., 48A) of the tire condition sensor unit (e.g., 18A) communicates a request to the identification provision unit (e.g., 42A) to transmit the location identification. The tire condition sensor unit (e.g., 18A) receives the requested location identification and updates the held identification.

Claims

1. A tire condition communication system for a vehicle that has a tire, wherein a sensed condition signal that includes an identification is transmitted to a vehicle-based unit, said system comprising:

a tire condition sensor unit, associated with the tire, that sends the sensed condition signal; and

an identification tag, located on the vehicle adjacent to the tire, that sends the identification to said tire condition sensor unit for inclusion in the sensed condition signal which is sent from the tire condition sensor unit to the vehicle-based unit.

2. A system as set forth in claim 1, wherein said identification tag is affixed to the vehicle, within a wheel well of the vehicle provided for the tire.

3. A system as set forth in claim 1, wherein said tire condition sensor unit includes memory means for holding the identification.

4. A system as set forth in claim 1, wherein said tire condition sensor unit includes means for outputting a low frequency signal that is a request to said identification tag to send the identification, said identification tag includes means for outputting a low frequency signal that conveys the identification.

5. A system as set forth in claim 4, wherein said identification tag includes means for deriving electrical energy from the low frequency signal output from said tire condition sensor unit and for utilizing the electrical energy to power said means for outputting a low frequency signal that conveys the identification.

6. A system as set forth in claim 1, wherein said identification tag includes a power supply for providing electrical energy to power said identification tag.

7. A system as set forth in claim 1, wherein said tire condition sensor unit includes means for outputting the sensed condition signal as a radio frequency signal.

8. A system as set forth in claim 1, wherein said tire condition sensor unit includes means for sensing tire inflation pressure and means for sending the sensed condition signal to indicate the sensed inflation pressure.

9. An system as set forth in claim 1, wherein said tire condition sensor unit includes means for sensing tire temperature and means for sending the sensed condition signal to indicate the sensed temperature.

10. A tire condition communication system for a vehicle that has a tire, said system comprising:

sensor means, associated with the tire, for sensing at least one tire condition;

memory means, associated with the tire, for holding an identification;

transmitter means, associated with the tire and operatively connected to said sensor means and said memory means, for transmitting a signal that indicates the held identification and the sensed tire condition;

receiver means, associated with the vehicle, for receiving the transmitted signal indicative of the held identification and the sensed tire condition;

location identification means, located on the vehicle adjacent to the tire and having a location identification, for transmitting the location identification in response to a request;

update request means for communicating the request to said location identification means to transmit the location identification; and

identification update means, associated with the tire and operatively connected to said memory means, for receiving the transmitted location identification and for providing the received transmitted location identification to said memory means to be held as the held identification.

11. A system as set forth in claim 10, wherein said update request means includes means for outputting a signal, said location identification means includes means for receiving the output signal and deriving energy from the received signal, and said location identification means includes means for utilizing the derived energy to transmit a signal that conveys the location identification.

12. A system as set forth in claim 10, wherein said update request means is associated with the tire.

13. A system as set forth in claim 10, wherein said location identification means is affixed to the vehicle, within a wheel well of the vehicle provided for the tire.

14. A system as set forth in claim 10, wherein said update request means includes means for outputting a low frequency signal that is the request to said location identification means to transmit the location identification, said location identification means includes means for outputting a low frequency signal that conveys the location identification.

15. A system as set forth in claim 14, wherein said location identification means includes means for deriving electrical energy from the low frequency signal output from said update request means and for utilizing the electrical energy to power said means for outputting the low frequency signal that conveys the location identification.

16. A system as set forth in claim 10, wherein said location identification means includes a power supply for providing electrical energy to power said location identification means.

17. A system as set forth in claim 10, wherein said transmitter means for transmitting the signal that indicates the held identification and the sensed tire condition includes means of r outputting the identification and condition indicative signal as a radio frequency signal.

18. A system as set forth in claim 10, including indicator means, associated with the vehicle, for providing an indication of the sensed tire condition to a vehicle operator.

19. A method of providing tire condition communication for a vehicle that has a tire, said method comprising:

associating a tire condition sensor unit with the tire;

affixing an identification tag to the vehicle adjacent to the tire;

sending an identification from the identification tag to the tire condition sensor unit; and

sending a sensed condition signal from the tire condition sensor unit to a vehicle-based unit, the tire condition sensor unit receiving the identification from the identification tag, the sensed condition signal including the received identification.

20. A method as set forth in claim 19, including sending a request from the tire condition sensor unit to the identification tag to send the identification.