Inductive position sensor with a cursor and a coupling scale

Details Inductive position sensor with a cursor and a coupling scale Inductive position sensor with a cursor and a coupling scale

2006-03-21

2006-03-21

Lefkowitz, Edward (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240

Reexamination Certificate

active

07015687

ABSTRACT:
The inductive position sensor includes a scale (10) with a series of conductive loops spaced out by a pitch T and a cursor (20) provided with conductors forming each a series of alternating hairpin turns spaced out by a pitch T, the inducing (21to23; 42, 44) and induced (31to33; 41, 43) cursor conductors are laid out in two separate interlaced conductor groups, coupling between inducing and induced conductors of the second group taking place only via the scale loops. Such a sensor is simple, robust, accurate, insensitive to external electromagnetic fields and tolerant of misalignment between cursor and scale.

REFERENCES:
patent: 4356732 (1982-11-01), Hachtel et al.
patent: 5804963 (1998-09-01), Meyer
patent: 5936399 (1999-08-01), Andermo et al.
patent: 6720760 (2004-04-01), Milvich
patent: 0 785 415 (1997-07-01), None
patent: 0 908 702 (1999-04-01), None

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