Tire condition sensor communication with unique sampling on vehicle-side diversity antenna array

• US 6,501,372 B2
• Filed: 02/02/2001
• Issued: 12/31/2002
• Est. Priority Date: 02/02/2001
• Status: Expired due to Fees

• Current Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Lin, Xing Ping
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US09/776,547
• Publication Number:
  US 20020105421A1
• Time in Patent Office: 697 Days
• Field of Search: 343/711, 343/712, 343/876, 340/442, 340/445, 340/446, 340/447
• US Class Current: 340/442
• 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 23/0444 Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders

Abstract

A system (10) and associated method for tire condition communication for a vehicle (12). The system (10) includes a sensor (18), associated with a tire (14), to sense at least one tire condition. Transmitter components (22, 24 and 30), associated with the tire (14) and operatively connected to the sensor (18), provide for transmission of a signal (32) that has a data rate and that indicates the sensed tire condition. A receiver unit (40), associated with the vehicle (12), receives the signal (32). The receiver unit (40) includes a plurality of antennas (42A-42N), each for receiving the transmitted signal (32), and a switching device (46) among the plurality of antennas at a rate that is quicker than the data rate of the transmitted signal (32).

Claims

1. A tire condition communication system for a vehicle, said system comprising:

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

transmitter means, associated with the tire and operatively connected to said sensor means, for transmitting a signal that has a data rate and that indicates the sensed tire condition; and

receiver means, associated with the vehicle, for receiving the signal, said receiver means including a plurality of antennas, each for receiving the transmitted signal, and means for switching among the plurality of antennas at a rate that is quicker than the data rate of the transmitted signal.

2. A system as set forth in claim 1, wherein each of said antennas outputs a signal within a time length of a data segment, said receiver means includes means for utilizing signals output by said plurality of antennas to determine a value of the associated data segment.

3. A system as set forth in claim 1, wherein said means for switching includes a plurality of switches, each switch is operatively connected to a respective one of said antennas.

4. A system as set forth in claim 3, wherein said receiver means includes means for controlling said plurality of switches such that only a single switch is on at a time.

5. A system as set forth in claim 1, wherein said receiver means includes means for processing the antenna output signals in succession.

6. A system as set forth in claim 1, wherein said receiver means includes means for utilizing the processed antennas outputs signals to discern the data of the transmitted signal.

7. A system as set forth in claim 6, wherein the data is comprised of a series of logic level segments, said means for utilizing the processed antennas outputs signals to discern the data includes means for utilizing less that all of the processed antenna outputs to discern a logic level at each segment.

8. A tire condition communication system for a vehicle, said system comprising:

a tire condition sensor and a transmitter unit associated with a tire, a transmitted signal from said unit has a data rate and indicates a sensed tire condition; and

a receiver unit associated with the vehicle, said receiver unit includes a plurality of transmitted signal receiving antennas, said receiver unit includes a plurality of switches, with each switch being interposed between a respective one of said antennas and another portion of said receiver unit, and said receiver unit including a switch-controlling controller that controls said switches to sequentially connect one antenna at a time to said other portion of said receiver at a rate that is quicker than the data rate of the transmitted signal.

9. A tire condition communication method for a vehicle, said method comprising the steps of:

sensing at least one tire condition at a tire;

transmitting a signal, from the tire, that indicates the sensed tire condition, the transmitted signal has a data rate; and

receiving the signal for use in determining the indication of the sensed tire condition, including switching among a plurality of antennas at a rate that is quicker than the data rate of the transmitted signal.

10. A method as set forth in claim 9, wherein the step of switching among the plurality of antennas includes the step of switching such that each of the antennas outputs a signal within a time length of a data segment, and the method also including the step of utilizing the plurality of output signals to determine a value of the associated data segment.

11. A method as set forth in claim 9, wherein the step of switching among the plurality of antennas includes controlling a plurality of switches, each switch being operatively connected to a respective one of the antennas.