Method and system for locating tires using RFID
First Claim
1. A method for determining the position of a plurality of tires having embedded Radio Frequency IDentification (RFID) tags, using at least one RFID reader antenna positioned at a predetermined distance from the plurality of tires, the distances between the RFID reader antenna and each of the tires to locate being different, the method comprising the steps of:
- for each identifier of RFID tags, measuring the delay required for a signal emitted by the RFID reader antenna to be reflected by the RFID tag having the identifier;
storing the measured delay if it is smaller than a previous measured delay corresponding to the identifier;
repeating the step of measuring the delay required for a signal emitted by the reader antenna to be reflected by the RFID tag having the identifier until a threshold value is reached;
ordering the stored delay stored for each of the RFID tags; and
, determining the position of each of the plurality of tires according to the predetermined distances between the RFID reader antenna and each of the plurality of tires to be located.
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Accused Products
Abstract
A method and system for locating tires is disclosed. According to the invention, an RFID reader antenna is positioned at a predetermined location such that the distances between the reader antenna and the tires are different. Each tire embeds at least one RFID tag. The distance between the reader antenna and each RFID tag is determined by measuring the delay required for the signal to be reflected by the RFID tag. Since all the distances between the reader antenna and the RFID tags are predetermined, knowing the distance between the reader antenna and a particular RFID tag allows the determination of the position of the particular RFID tag and of the tire.
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Citations
15 Claims
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1. A method for determining the position of a plurality of tires having embedded Radio Frequency IDentification (RFID) tags, using at least one RFID reader antenna positioned at a predetermined distance from the plurality of tires, the distances between the RFID reader antenna and each of the tires to locate being different, the method comprising the steps of:
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for each identifier of RFID tags, measuring the delay required for a signal emitted by the RFID reader antenna to be reflected by the RFID tag having the identifier;
storing the measured delay if it is smaller than a previous measured delay corresponding to the identifier;
repeating the step of measuring the delay required for a signal emitted by the reader antenna to be reflected by the RFID tag having the identifier until a threshold value is reached;
ordering the stored delay stored for each of the RFID tags; and
,determining the position of each of the plurality of tires according to the predetermined distances between the RFID reader antenna and each of the plurality of tires to be located. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for determining the position of a plurality of tires having embedded Radio Frequency IDentification (RFID) tags, using at least one RFID reader antenna positioned at a predetermined distance from the plurality of tires, the distances between the RFID reader antenna and each of the tires to locate being different, the apparatus comprising:
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an identifier of each of the RFID tags, means for measuring the delay required for a signal emitted by the RFID reader antenna to be reflected by the RFID tag having the identifier;
means for storing the measured delay if it is smaller than a previous measured delay corresponding to the identifier;
means for repeating the step of measuring the delay required for a signal emitted by the reader antenna to be reflected by the RFID tag having the identifier until a threshold value is reached;
means for ordering the stored delay stored for each of the RFID tags; and
,means for determining the position of each of the plurality of tires according to the predetermined distances between the RFID reader antenna and each of the plurality of tires to be located. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification