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Low frequency magnetic induction positioning system and method

  • US 9,086,469 B2
  • Filed: 03/11/2013
  • Issued: 07/21/2015
  • Est. Priority Date: 05/08/2012
  • Status: Active Grant
First Claim
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1. A method for determining a real-time location of an object within a facility, the method comprising:

  • transmitting a signal packet from at least one low-frequency magnetic induction transmitter of a plurality of low-frequency magnetic induction transmitters, each of the plurality of low-frequency magnetic induction transmitters comprising at least one orthogonally oriented transmit coil, the signal packet comprising a unique transmitter identifier code and a coil orientation code;

    receiving the signal packet at at least one low-frequency receiver;

    decoding the signal packet at the at least one low-frequency receiver to generate a decoded signal packet data; and

    estimating a distance from the at least one low-frequency magnetic induction transmitter to the at least one low-frequency receiver based on the decoded signal packet data.

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