Electricity: measuring and testing – Magnetic – Displacement
Patent
1991-02-21
1992-10-27
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
32420712, 32420722, 32420725, G01B 730, G01B 714
Patent
active
051592681
ABSTRACT:
A Hall Effect device is provided for use as a rotary position sensor in cooperation with a shaped magnet that imposes a magnetic field on the Hall Effect device which is generally linear and proportional to the angular position of the shaped magnet. Two alternative embodiments are described and illustrated which both provide a high degree of linearity between the electrical output of the Hall device and the rotational position of the shaped magnet. One of the alternative embodiments is generally oblong and the other alternative embodiment is generally bell shaped. Both of these alternative embodiments exhibit a high degree of linearity between the strength of the magnetic field imposed on a Hall Effect element and the rotational, or angular, position of the shaped magnet.
REFERENCES:
patent: 3777273 (1973-12-01), Baba et al.
patent: 3835373 (1974-09-01), Matula
patent: 4180753 (1979-12-01), Cook
patent: 4570118 (1986-02-01), Tomczak et al.
patent: 4789826 (1988-12-01), Willett
Lemarquand et al; Annular Magnet Position Sensor, IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2041-2043.
B. D. Inglis & G. W. Donaldson, "A New Hall-Effect Synchro", Solid-State Electronics (1966).
Honeywell Inc.
Lanyi William D.
Strecker Gerard R.
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