Combined tire pressure monitoring and keyless entry receiver

• US 6,885,283 B2
• Filed: 05/15/2002
• Issued: 04/26/2005
• Est. Priority Date: 02/20/2001
• Status: Expired due to Term

• Current Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Original Assignee: Siemens VDO Automotive Corporation (Siemens AG)
• Inventors: Desai, Tejas B., O'Connor, Steve, Losey, Allan
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): BROWN, VERNAL U
• Application Number:
  US10/146,371
• Publication Number:
  US 20020177406A1
• Time in Patent Office: 1,077 Days
• Field of Search: 340/10.3, 340/447, 340/442, 340/449, 340/445, 340/539.1, 340/10.4, 340/426.36, 340/505, 340/444, 340/10.1, 731/463, 455/39, 370/339, 370/311
• US Class Current: 340/5.61
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 27/06 Demodulator circuits; Receiver circuits
• CPC Class Codes: H04L 27/14 Demodulator circuits; Receiver circuits

Abstract

A receiver assembly (16) includes an amplitude shift keyed mode (52) and a frequency shift keyed mode (58) selectively engagable to receive radio frequency transmissions from the tire monitoring system (26) and a remote keyless entry system (20) and switches between modes in response to receipt of a wake up pattern.

Claims

1. A receiver assembly for receiving signals from different devices with differing signal formats comprising;

an amplitude shift keyed made for receiving an amplitude shifted keyed signal; and

a frequency shift keyed mode to receive a shift keyed signal, said amplitude shift keyed mode engaged to receive signals in a default condition, said frequency shift keyed mode engaged to receive signals in response to a wake up pattern.

2. The assembly of claim 1, wherein said wake up pattern precedes said frequency shift keyed signal.

3. The assembly of claim 1, wherein said amplitude shift keyed signal includes said wakeup pattern initiating receipt of a subsequent signal by said receiver in said frequency shift keyed mode.

4. The assembly of claim 2, wherein said wake up pattern is an amplitude shift keyed signal.

5. The assembly of claim 4, wherein said amplitude shift keyed wake up pattern initiates engagement of said frequency shift keyed mode to receive a frequency shift keyed signal.

6. The assembly of claim 5, wherein subsequent frequency shift keyed signals do not include said wake up pattern.

7. The assembly of claim 5, wherein a series of frequency shift keyed signals are transmitted, said series includes an initial signal preceded by said wake up pattern, and subsequent signals not preceded by said wake up pattern.

8. The assembly of claim 7, wherein said receiver reverts back to said amplitude shift keyed mode in response to a triggering event.

9. The assembly of claim 8, wherein said triggering event is a passage of a predetermined amount of time.

10. The assembly of claim 8, wherein said triggering event is receipt of an amplitude shift keyed signal.

11. The assembly of claim 1, wherein said amplitude shift keyed signal is emitted by a remote keyless entry system for a motor vehicle.

12. The assembly of claim 1, wherein said frequency shift keyed signal is emitted by a tire pressure monitoring system for a motor vehicle.

13. A method of receiving signals of different formats from different systems comprising the steps of;

a. receiving a first signal in an amplitude shift keyed mode;

b. receiving a second signal in a frequency shift keyed mode, said second signal differing from said first signal and including a wake up pattern; and

c. switching between said first and second modes in response to receipt of said wake up pattern.

14. The method of claim 13, wherein said first signal is an amplitude shift keyed signal and said second signal is a frequency shift keyed signal.

16. The system of claim 13, wherein an amplitude shift keyed wake up pattern initiates said step c.

17. The method of claim 13, further including the steps of emitting a frequency shift keyed signal from a tire pressure monitoring system, and emitting an amplitude shift keyed signal from a remote keyless entry system.

15. A method of receiving signals of different formats from different systems comprising the steps of:

a) receiving a first signal in an amplitude shift keyed mode;

b) receiving a second signal in a frequency shift keyed mode, said second signal differing from said first signal and including an amplitude shift keyed wake up pattern; and

c) switching between said amplitude shift keyed mode and said frequency shift keyed mode in response to receipt of said wake up pattern, said amplitude shift keyed wake up pattern alerting the receiver assembly to switch to said frequency shift keyed mode for receipt of a subsequent frequency shift keyed signal.

18. A receiver assembly for receiving signals from different devices with differing signal formats comprising:

an amplitude shift keyed mode for receiving an amplitude shift keyed signal; and

a frequency shift keyed mode to receive a frequency shift keyed signal, wherein said amplitude shift keyed mode is engaged to receive signals in a default condition, and said frequency shift keyed mode is engaged to receive signals in response to an amplitude shift keyed wake up pattern.

19. The assembly of claim 18, wherein frequency shift keyed signals following said amplitude shift keyed wake up pattern do not include said amplitude shift keyed wake up pattern.

20. The assembly of claim 18, wherein a series of frequency shift keyed signals are transmitted, said series includes an initial signal preceded by said amplitude shift keyed wake up pattern, and subsequent signals not preceded by said amplitude shifted keyed wake up pattern.

21. The assembly of claim 18, wherein said amplitude shift keyed signal is emitted by a remote keyless entry system for a motor vehicle.

22. The assembly of claim 18, wherein said frequency shift keyed signal is emitted by a tire pressure monitoring system for a motor vehicle.