Rotational sensor including axially adjacent targets one of whic

Details Rotational sensor including axially adjacent targets one of whic Rotational sensor including axially adjacent targets one of whic

1995-12-20

1998-02-03

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

Displacement

G01B 714

Patent

active

057148830

ABSTRACT:
A rotation sensor has a target wheel including first and second tracks and a dual-element magnetoresistive sensor. Each individual magnetoresistive element is aligned with a respective track of the target wheel to provide substantially inverse resistive changes with the passage of the wheel. One of the tracks is characterized by alternating high and low permeability, such as by a toothed section, and the other of the tracks is characterized by invariant permeability.

REFERENCES:
patent: 4785242 (1988-11-01), Vaidya et al.
patent: 4881414 (1989-11-01), Setaka et al.
patent: 4926122 (1990-05-01), Schroeder et al.
patent: 5315244 (1994-05-01), Griebeler
patent: 5444370 (1995-08-01), Wu
patent: 5469055 (1995-11-01), Mueller et al.

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