Magnetic array position sensor and method

Details Magnetic array position sensor and method Magnetic array position sensor and method

2006-07-04

2006-07-04

Lefkowitz, Edward (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250

Reexamination Certificate

active

07071682

ABSTRACT:
A movable target having individually identifiable magnetic irregularities and a stationary magnetosensitive array and circuit for sensing the magnetic irregularities to thereby provide position of the moveable target relative to a fixed initial location. A method to determine a present position of the target origin including the steps of: identifying a magnetic irregularity of the moveable target; determining a first distance, Y, equal to a distance of the identified magnetic irregularity to a target origin; determining a second distance, X, equal to a distance of the identified magnetic irregularity to the array origin; and determining a distance, L, of the target origin with respect to the fixed initial location, according to a relation: L=L0+X−Y.

REFERENCES:
patent: 6201466 (2001-03-01), Schroeder
patent: 6577984 (2003-06-01), Clairet et al.
patent: 2004/0150393 (2004-08-01), Lequesne et al.
patent: 2004/0263155 (2004-12-01), Schroeder et al.
U.S. Appl. No. 10/603,462, filed Jun. 25, 2003, Schroeder et al.

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