Multiresonator radio frequency identification (rfid) tag overlay as tag recoding
AssigneeXerox Corporation
InventorsGeorge A. GIBSON, Wayne Alan BUCHAR
Life of this patent
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Abstract
An improved system and method is provided for using the superposition of a number of extremely low cost multiresonator tags that can be configured to allow information to be written to the tag after application. The new information is written through layering of tags to encode information on an object to which the tags are affixed.
Claims20
A method, comprising:
- wirelessly interrogating chipless radio frequency identification (CRFID) tags each comprising an array of resonators with an electromagnetic radio frequency (RF) signal, wherein the CRFID tags are substantially coincident to each other;
- wherein the signal is a single short duration RF pulse that simultaneously irradiates the CRFID tags;
- wherein each CRFID tag encodes information on a collection of objects, an object comprising a CRFID tag, or a combination thereof;
- wherein each CRFID tag is printed on a substrate using a conductive metal ink;
- receiving a response signal comprising a combination of reflected signals from the array of resonators in the CRFID tags;
- and
- processing the response signal to extract the encoded information in the CRFID tags.
A reader system to interrogate with one transmitted query chirp multiple tags located in one physical space comprising:
- a processor;
- a storage device coupled to the processor;
- wherein the storage device contains instructions operative on the processor to extract information from chipless radio frequency identification (CRFID) tags each comprising an array of resonators by:
- wirelessly interrogating the CRFID tags that are substantially coincident to each other using an electromagnetic radio frequency (RF) signal;
- wherein the signal is a single short duration RF pulse that simultaneously irradiates the CRFID tags;
- wherein each CRFID tag encodes information on a collection of objects, an object comprising a CRFID tag, or a combination thereof;
- wherein each CRFID tag is printed on a substrate using a conductive metal ink;
- receiving a response signal comprising a combination of reflected signals from the CRFID tags;
- and
- processing the response signal to extract the encoded information in the CRFID tags.
A non-transitory computer-readable medium storing computer-readable instructions which, when executed by a processor, cause the processor to execute information extraction from chipless radio frequency identification (CRFID) tags located in one physical space, comprising:
- wirelessly interrogating chipless radio frequency identification (CRFID) tags that are substantially coincident to each other using an electromagnetic radio frequency (RF) signal, wherein each of the CRFID tags comprise an array of resonators;
- wherein the signal is a single short duration pulse that simultaneously irradiates the CRFID tags;
- wherein each CRFID tag encodes information on a collection of objects, an object comprising a CRFID tag, or a combination thereof;
- wherein each CRFID tag is printed on a substrate using a conductive metal ink;
- receiving a response signal comprising a combination of reflected signals from the CRFID tags;
- and
- processing the response signal to extract the encoded information in the CRFID tags.
Dependencies are inferred from the claim text.