Interrogator and interrogation system employing the same

Details Interrogator and interrogation system employing the same Interrogator and interrogation system employing the same

2007-08-13

2008-08-12

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572700, C340S505000

Reexamination Certificate

active

07411506

ABSTRACT:
An interrogator, methods of discerning the presence of an object, and interrogation systems employing the same. In one embodiment, the interrogation systems include multiple interrogators that communicate with a base command unit to track a location of an object. In another embodiment wherein the object is an RFID object (e.g., an object with an RFID tag), the interrogators employ signal processing techniques such as precharging the RFID object, and correlating a reference code with a reply code from the RFID object using selected techniques to increase a sensitivity of the interrogator, especially for adverse environments. In other embodiments, the interrogation systems include variations of metal instruments and sponges employed therewith. In yet another embodiment, the interrogation system includes metal interrogators capable of discerning the presence of a metal object, especially in a presence of another metal object.

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