Determination of wheel sensor position using radio frequency detectors in an automotive remote tire monitor system
First Claim
Patent Images
1. A tire monitor method comprising:
- at two or more detectors, detecting envelopes of respective radio transmissions from two or more tire monitors; and
based on the detected envelopes of the respective radio transmissions, identifying a source tire monitor position.
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Abstract
A tire monitor system and method rely on only two RF detector mounted on the vehicle, one in close proximity to one of the front wheels and the other in close proximity to one of the rear wheels. An RF detector can distinguish between its local transmitter and the other transmitter on the same axle by the amount of signal received. Every time the controller decodes transmitted RF data, the controller looks to see if and which RF detector has detected the transmission. The controller can then determine over a short period of time which sensor identifier belongs to which corner of the vehicle.
56 Citations
12 Claims
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1. A tire monitor method comprising:
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at two or more detectors, detecting envelopes of respective radio transmissions from two or more tire monitors; and
based on the detected envelopes of the respective radio transmissions, identifying a source tire monitor position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A remote tire monitor system comprising:
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a first plurality of tire monitors associated with wheels of a vehicle and configured for transmission of radio signals conveying information;
a second plurality of detectors, each detector associated with a pair of tire monitors to detect presence of radio signals from the pair of tire monitors and to produce a detected transmission indication in response to the detection of the presence of the radio signals; and
a control unit electrically coupled by conductors with the plurality of detectors to receive detected transmission indications, the control unit configured to receive tire monitor transmissions and associate transmitting tire monitors with positions on the vehicle based on the received detected transmission indications. - View Dependent Claims (10, 11)
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12. A remote tire monitor system comprising:
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tire monitors mountable on wheels of a vehicle and configured for radio transmissions of tire data;
radio detectors, each radio detector being configured to detect radio transmissions from tire monitors according to proximity to the tire monitors and produce an indication of a detected transmission, a first radio detector being positioned near one of a first pair of tire monitors and a second radio detector being positioned near a second pair of tire monitors on the vehicle, each radio detector being positioned proximate one tire monitor of its respective pair of tire monitors and positioned distal the other tire monitor of its respective pair of tire monitors; and
a control unit which receives the radio transmissions and which is coupled with the radio detectors to count the indications produced by respective tire monitors, the control unit determining respective positions of the tire monitors on the vehicle based on counts of the indications.
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Specification