LOW LINE TPMS: SENSOR ASSOCIATION USING RSSI AND DOPPLER SIGNATURES WITH A SINGLE OR MULTIPLE ECUs
First Claim
1. A tire pressure monitoring system (TPMS) for a vehicle having a plurality of tires, said system comprising:
- a plurality of transmitter units where a separate transmitter unit is provided in each tire, and where each transmitter unit transmits TPMS signals including data identifying the tire and the pressure in the tire; and
at least one receiver unit receiving the TPMS signals from each of the transmitter units, said at least one receiver unit identifying a signature in each of the TPMS signals and classifying the signatures over time to provide a training set signature representing a location of the transmitter units.
3 Assignments
0 Petitions
Accused Products
Abstract
A TPMS that uses a unique signature, such as RSSI signal levels and statistics or Doppler shift information, to identify the location of where the TPMS signal is being transmitted from. The TPMS includes a separate transmitter unit provided in each tire, where each transmitter unit transmits TPMS signals including an ID code identifying the tire and the pressure in the tire. The TPMS also includes a receiver unit that receives the TPMS signals from each of the transmitter units, where the receiver unit stores an average or other classification of the signature over time to identify the location of the transmitter unit for a particular ID code. The receiver unit compares the new received TPMS signals to the classified signals to identify whether the ID code indicates that the position of the tire has changed.
10 Citations
20 Claims
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1. A tire pressure monitoring system (TPMS) for a vehicle having a plurality of tires, said system comprising:
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a plurality of transmitter units where a separate transmitter unit is provided in each tire, and where each transmitter unit transmits TPMS signals including data identifying the tire and the pressure in the tire; and at least one receiver unit receiving the TPMS signals from each of the transmitter units, said at least one receiver unit identifying a signature in each of the TPMS signals and classifying the signatures over time to provide a training set signature representing a location of the transmitter units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A tire pressure monitoring system (TPMS) for a vehicle having a plurality of tires, said system comprising:
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a plurality of transmitter units where a separate transmitter unit is provided in each tire, and where each transmitter unit transmits TPMS signals including an identification (ID) code identifying the tire and the pressure in the tire; and at least one receiver unit receiving the TPMS signals from each of the transmitter units, said at least one receiver unit identifying a received signal strength indicator (RSSI) in each of the TPMS signals and classifying the RSSI over time to provide a training set RSSI identifying a location of the transmitter units, wherein the at least one receiver unit compares the RSSI in the received TPMS signals to the training set RSSIs to determine that the location of a tire has changed and identifies a new location of a tire by identifying that the RSSI of a received TPMS signal for that tire matches the training set RSSI for a different RSSI of another tire. - View Dependent Claims (12, 13)
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14. A method for identifying the location of a tire on a vehicle having a plurality of tires in a tire pressure monitoring system (TPMS), said method comprising:
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transmitting TPMS signals from a plurality of transmitter units where a separate transmitter unit is provided in each tire, where the TPMS signals including data identifying the tire and the pressure in the tire; receiving the TPMS signals by at least one receiver unit receiving the TPMS signals from each of the transmitter units; identifying a signature in each of the TPMS signals and classifying the signatures over time to provide a separate training set signature of a location of the transmitter units; and comparing the signature in the received TPMS signals to the training set signatures to determine that the location of a tire has changed. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification