Identification tags using amorphous wire

Details Identification tags using amorphous wire Identification tags using amorphous wire

1997-08-12

1998-11-03

Mullen, Jr., Thomas J.

Communications: electrical

Condition responsive indicating system

Specific condition

235493, G08B 1314

Patent

active

058315322

ABSTRACT:
An inexpensive multibit magnetic tag is described which uses an array of amorphous wires in conjunction with a magnetic bias field. The tag is interrogated by the use of a ramped field or an ac field or a combination of the two. The magnetic bias is supplied either by coating each wire with a hard magnetic material which is magnetized or by using magnetized hard magnetic wires or foil strips in proximity to the amorphous wires. Each wire switches at a different value of the external interrogation field due to the difference in the magnetic bias field acting on each wire.

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