Multi-track sense magnet with reduced cross-talk

Details Multi-track sense magnet with reduced cross-talk Multi-track sense magnet with reduced cross-talk

2008-04-15

2009-08-11

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S210000

Reexamination Certificate

active

07573259

ABSTRACT:
A multi-track sense magnet for use in a system for sensing the relative displacement of two elements, and including a magnetic structure that is moveable relative to detector devices for detecting movement of the magnetic structure. The magnetic structure includes at least a first track and a second track extending generally parallel to each other, each track including a plurality of sectors of alternating magnetic poles. A blocker track is located between the first and second tracks, wherein the blocker track includes a predetermined number of sectors corresponding to the number of sectors on the first track. Each sector of the blocker track is aligned with and defines an opposite magnetic pole to an adjacent sector of the first track to alter the magnetic field of the first track extending toward the second track.

REFERENCES:
patent: 4209810 (1980-06-01), Ragle et al.
patent: 4458275 (1984-07-01), Monti
patent: 4792788 (1988-12-01), Kumar
patent: 7196527 (2007-03-01), Stridsberg
patent: 7486206 (2009-02-01), Kahlman
patent: 2007/0216544 (2007-09-01), Dalton

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