Patent ID: 6353413
Filing Date: 2002-03-05
Classification: G01S,H04B,H04M

Abstract:
A locator system for determining the spatial location of a target object having a particular identification code and generating a location signal in response to an interrogation signal containing the identification code, the locator system comprising:a plurality of detection units for measuring time intervals between a time reference and the time at which the detection unit receives the location signal; and a base unit for determining the spatial location of the target object with reference to a predetermined spatial reference point based on the measured time intervals, the base unit transmitting the interrogation signal containing the identification code in response to a request to find the target object having the identification code; wherein the base unit comprises: a plurality of counters, each corresponding to one of the detection units, each counter measuring the time interval between the time a start count signal is received and the time the detection unit receives the location signal.