Capacitive code reader with interelectrode shielding

Details Capacitive code reader with interelectrode shielding Capacitive code reader with interelectrode shielding

1990-10-04

1992-10-27

Weinhardt, Robert

Registers

Coded record sensors

Particular sensor structure

235492, 235494, 235451, G06K 706, G06K 708

Patent

active

051591812

ABSTRACT:
A reader of a code represented by a coded array mounted on a surface and sisting of a material differing in its electrical conductivity from its surroundings comprises a pair of electrodes supported in a body movable across the surface. The pair of electrodes can be capacitively coupled, without contact, with spaced coupling sites forming part of the array. The electrodes carried by the reader body form the free ends of an open electrical circuit which has a voltage source and a detector in series. The voltage source is a signal generator applying a steady-state AC to the electrodes. The reader is movable relative and parallel to the coded surface with at least one of its electrodes above the coupling sites, the AC frequency being so selected in relation to the rate of motion that for each capacitive coupling, the measurement takes place in steady-state.

REFERENCES:
patent: 3218635 (1965-11-01), Masur
patent: 3519802 (1970-07-01), Cinque et al.
patent: 3699311 (1972-10-01), Dunbar
patent: 3719804 (1973-03-01), Illing
patent: 4255652 (1981-03-01), Weber
patent: 4355300 (1982-10-01), Weber
patent: 4587410 (1986-05-01), Milnes
patent: 4888475 (1989-12-01), Mullenmeister

Affiliated with

Also associated with

Rating

Capacitive code reader with interelectrode shielding does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitive code reader with interelectrode shielding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive code reader with interelectrode shielding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-907254