Binary encoded multiple frequency RF indentification tag

Details Binary encoded multiple frequency RF indentification tag Binary encoded multiple frequency RF indentification tag

1991-09-09

1993-06-08

Shepperd, John

Registers

Coded record sensors

Particular sensor structure

235487, 340572, G06K 700, G06K 19067

Patent

active

052181898

ABSTRACT:
A tag for identifying an item to which it is attached includes an inductance connected in parallel with a capacitance. The capacitance includes a plurality of individual capacitors, each of a predetermined different capacitance. The individual capacitors are connected to the inductance to establish a resonant circuit having a predetermined resonant frequency. At least one of the capacitors includes a dimple for shorting the capacitor when the tag is exposed to electromagnetic energy at the predetermined resonant frequency. The shorted capacitor establishes a second resonant frequency which may be used to identify which capacitor has become shorted. A binary "1" is assigned to either the shorted capacitor or the non shorted capacitor and a binary "0" is assigned to the capacitors which are not assigned a binary "1", the binary "1"s and "0"s combining to establish a numeric code uniquely associated with the tag.

REFERENCES:
patent: 3624631 (1971-11-01), Chomet et al.
patent: 3810147 (1974-05-01), Lichtblau
patent: 3913219 (1975-10-01), Lichtblau
patent: 3967161 (1976-06-01), Lichtblau
patent: 4021705 (1977-05-01), Lichtblau
patent: 4498076 (1985-02-01), Lichtblau
patent: 4567473 (1986-01-01), Lichtblau
patent: 4598276 (1986-07-01), Tait
patent: 4670740 (1987-06-01), Herman et al.
patent: 4694283 (1987-09-01), Reeb
patent: 4745401 (1988-05-01), Montean
patent: 4792790 (1988-12-01), Reeb
patent: 4864280 (1989-09-01), van der Meij
patent: 4882569 (1989-11-01), Dey
patent: 4910499 (1990-03-01), Benge et al.
patent: 4920335 (1990-04-01), Andrews
patent: 5081445 (1992-01-01), Gill et al.
patent: 5103210 (1992-04-01), Rode et al.

Affiliated with

Also associated with

Rating

Binary encoded multiple frequency RF indentification tag does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Binary encoded multiple frequency RF indentification tag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary encoded multiple frequency RF indentification tag will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1935674