Variably spaced multi-point RFID tag reader systems and methods
First Claim
Patent Images
1. A system for determining a time of a passing at a timing point reference line of an RFID tag traveling along a route, said system comprising:
- a first RFID tag reader system having a processor, a memory, a clock, a communication interface, and a first radio frequency transceiver configured for wirelessly communicating with the RFID tag, and having one or more first antennas coupled to the first radio frequency transceiver configured for positioning at a first monitoring position relative to the timing point reference line, the first RFID tag reader system configured for transmitting via the one or more first antennas first tag read requests and receiving via the one or more first antennas one or more first tag reads from the RFID tag,a second RFID tag reader system that includes a processor, a memory, a clock, a communication interface, and a second radio frequency transceiver configured for wirelessly communicating with the RFID tag, and having one or more second antennas coupled to the second radio frequency transceiver configured for positioning at a second monitoring position relative to the timing point reference line and spaced apart from the first monitoring position, the second RFID tag reader system configured for transmitting via the one or more second antennas second tag read requests and receiving via the one or more second antennas one or more second tag reads from the RFID tag, the one or more second antennas configured for positioning at an offset distance along the route from the timing point reference line, anda timing system configured for storing in a timing system memory a tag reader normalization parameter associated with the timing point reference line and further configured for determining a time of passing of the RFID tag at the timing point reference line responsive to the received first and second tag reads and the stored tag reader normalization.
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Abstract
Systems and methods for determining a time of a passing at a reference line of an RFID tag traveling along a route and a time of lapsing of the tracked RFID tag on the route, the system have a plurality of spaced apart tag reader systems for wirelessly obtaining tag reads, wherein at least one of the tag reader systems is space apart from the reference line. The timing system receives a plurality of tag reads and determines the time of passing of the RFID at the reference line responsive to the plurality of received tag read messages received from the plurality of tag reader systems.
104 Citations
21 Claims
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1. A system for determining a time of a passing at a timing point reference line of an RFID tag traveling along a route, said system comprising:
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a first RFID tag reader system having a processor, a memory, a clock, a communication interface, and a first radio frequency transceiver configured for wirelessly communicating with the RFID tag, and having one or more first antennas coupled to the first radio frequency transceiver configured for positioning at a first monitoring position relative to the timing point reference line, the first RFID tag reader system configured for transmitting via the one or more first antennas first tag read requests and receiving via the one or more first antennas one or more first tag reads from the RFID tag, a second RFID tag reader system that includes a processor, a memory, a clock, a communication interface, and a second radio frequency transceiver configured for wirelessly communicating with the RFID tag, and having one or more second antennas coupled to the second radio frequency transceiver configured for positioning at a second monitoring position relative to the timing point reference line and spaced apart from the first monitoring position, the second RFID tag reader system configured for transmitting via the one or more second antennas second tag read requests and receiving via the one or more second antennas one or more second tag reads from the RFID tag, the one or more second antennas configured for positioning at an offset distance along the route from the timing point reference line, and a timing system configured for storing in a timing system memory a tag reader normalization parameter associated with the timing point reference line and further configured for determining a time of passing of the RFID tag at the timing point reference line responsive to the received first and second tag reads and the stored tag reader normalization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for determining a time of a passing at a timing point reference line of an RFID tag traveling along a route, said method comprising:
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wirelessly communicating with the RFID tag via one or more first antennas coupled to a first radio frequency transceiver of a first RFID tag reader system configured for positioning at a first monitoring position relative to the timing point reference line, transmitting, by the first RFID tag reader system via the one or more first antennas, first tag read requests and receiving, by the first RFID tag reader system via the one or more first antennas, one or more first tag reads from the RFID tag, wirelessly communicating with the RFID tag via one or more second antennas coupled to a second radio frequency transceiver of a second RFID tag reader system configured for positioning at a second monitoring position relative to the timing point reference line and spaced apart from the first monitoring position, transmitting, by the second RFID tag reader system via the one or more second antennas, second tag read requests and receiving, by the second RFID tag reader system via the one or more second antennas, one or more second tag reads from the RFID tag, the one or more second antennas positioned at an offset distance along the route from the timing point reference line, storing in a timing system memory a tag reader normalization parameter associated with the timing point reference line, and determining a time of passing of the RFID tag at the timing point reference line responsive to the received first and second tag reads and the stored tag reader normalization parameter. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification