Interrogator and interrogation system employing the same
First Claim
1. An interrogator, comprising:
- a radio frequency identification (RFID) sensing subsystem configured to detect an RFID object; and
a control and processing subsystem configured to control an interrogation sequence of said RFID sensing subsystem by extending a precharging of said RFID object to provide adequate energy to charge an RFID tag of an otherwise undetectable RFID object prior to detecting said RFID object.
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Accused Products
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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Citations
20 Claims
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1. An interrogator, comprising:
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a radio frequency identification (RFID) sensing subsystem configured to detect an RFID object; and a control and processing subsystem configured to control an interrogation sequence of said RFID sensing subsystem by extending a precharging of said RFID object to provide adequate energy to charge an RFID tag of an otherwise undetectable RFID object prior to detecting said RFID object. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an interrogator, comprising:
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controlling an interrogation sequence of a radio frequency identification (RFID) sensing subsystem by extending a precharging of said RFID object to provide adequate energy to charge an RFID tag of an otherwise undetectable RFID object with a control and processing subsystem; and detecting said RFID object. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An interrogation system, comprising:
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a radio frequency identification (RFID) object; and an interrogator configured to detect said RFID object and control an interrogation sequence of said interrogator by extending a precharging of said RFID object to provide adequate energy to charge an RFID tag of an otherwise undetectable RFID object prior to detecting said RFID object. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification