Patent ID: 9086469
Filing Date: 2015-07-21
Classification: G01B,G01S,G07C

Abstract:
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.