Method and apparatus for identifying remote sending units in a tire pressure monitor system of a vehicle using secondary modulation of wheel rotation
First Claim
Patent Images
1. A method for operating a remote tire monitor system including a plurality of sending units associated with wheels positioned on a vehicle and a receiving unit, the method comprising:
- at at least one of the sending units, transmitting radio signals including tire data related to a tire associated with the sending unit;
at the receiving unit, receiving the radio signals;
recovering the tire data from the radio signal;
detecting secondary variations in the radio signals; and
associating a particular secondary variation with a particular wheel position.
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Abstract
A remote tire monitoring system (10) includes tire monitors (12) positioned at respective wheels of a vehicle (V) for transmitting radio signals modulated by tire data and modulation means positioned above near the tire monitors for imposing a secondary modulation on the radio signals. A receiver (14) receives the radio signals and recovers the tire data (26) from the radio signals and associates the tire monitor with the respective wheels of the vehicle using the secondary modulation.
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Citations
18 Claims
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1. A method for operating a remote tire monitor system including a plurality of sending units associated with wheels positioned on a vehicle and a receiving unit, the method comprising:
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at at least one of the sending units, transmitting radio signals including tire data related to a tire associated with the sending unit;
at the receiving unit, receiving the radio signals;
recovering the tire data from the radio signal;
detecting secondary variations in the radio signals; and
associating a particular secondary variation with a particular wheel position. - View Dependent Claims (2, 3, 4, 6)
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7. A remote tire monitoring system comprising:
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a plurality of tire monitors associated with wheels of a vehicle and configured to transmit radio signals conveying tire data; and
a receiver configured to receive the radio signals, the receiver including a circuit which detects secondary variations in the radio signals due to movement of the plurality of tire monitors. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A remote tire monitoring system comprising:
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tire monitor means positioned at respective wheels of a vehicle for transmitting radio signals modulated by tire data;
modulation means positionable near the tire monitor means for imposing a secondary modulation on the radio signals; and
receiving means for receiving the radio signals, the receiving means including;
demodulation means for recovering the tire data from the radio signals, and decoding means responsive to the secondary modulation for associating the tire data with respective wheel locations of the vehicle. - View Dependent Claims (15, 16, 17, 18)
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Specification