×

EXTENSIBLE OBJECT LOCATION SYSTEM AND METHOD USING MULTIPLE REFERENCES

  • US 20120188129A1
  • Filed: 03/30/2012
  • Published: 07/26/2012
  • Est. Priority Date: 05/10/2005
  • Status: Active Grant
First Claim
Patent Images

1. A zone-based object location system to determine a position of an object in one of multiple zones, the object being associated with an object tag that transmits an RF object signal, the system comprising:

  • respective groups of receivers, each group of receivers including multiple receivers and defining a corresponding zone, wherein at least one receiver is common to at least two zones and wherein each receiver includes a timing circuit to detect an arrival time of an RF signal;

    a clock source to lock phase relations of the timing circuits relative to each other;

    a reference tag associated with each zone is configured to transmit an RF reference signal from a known location within the zone; and

    a processing hub configured to obtain time-of-arrival information indicative of arrival times of the RF object signal transmitted by the object tag and the RF reference signal transmitted by the reference tag at receivers of a group of receivers to determine the position of the object within one of the multiple zones.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×