Programmable magnetic data tag

There is described a programmable tag susceptible to magnetic interrogation using an interrogating magnetic field, the tag comprising: (a) a plurality of saturable magnetic structures (310) for non-linearly coupling the interrogating magnetic field into a corresponding response magnetic field; (b) r...

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Bibliographic Details
Main Authors SILLS COLIN S, NORRIS TIMOTHY S
Format Patent
LanguageEnglish
Published 25.11.2004
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:There is described a programmable tag susceptible to magnetic interrogation using an interrogating magnetic field, the tag comprising: (a) a plurality of saturable magnetic structures (310) for non-linearly coupling the interrogating magnetic field into a corresponding response magnetic field; (b) reversibly programmable magnetic regions (330) for applying offset magnetic fields to the magnetic structures for modifying their non-linear coupling characteristics. The tag is susceptible to being mass-produced from a continuous strand of tag material severed to produce individual tags. The tag is of advantage in that it can be reversibly programmed. There is also described a method of recording data on the tag, the method including the steps of: (c) bringing the tag in close proximity to a recording apparatus; and (d) applying a magnetising magnetic field to each of the magnetic regions (330) for modifying a magnetic field retained therein to which its associated saturable structure is subjected.
Bibliography:Application Number: US20040486161