Apparatus for determining angular position and rotational speed

Details Apparatus for determining angular position and rotational speed Apparatus for determining angular position and rotational speed

1996-10-09

1998-04-21

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324162, 324174, 32420716, G01B 730, G01P 3487, G01P 1500, B60T 832

Patent

active

057421609

ABSTRACT:
In a preferred embodiment, an apparatus for detecting the angular position, rotational speed, and/or acceleration of a rotatable member, including: an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith; a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, with the rotatable member passing through the toroidal core, the directional magnetometer being oriented so as to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of the magnetic source, and to provide outputs indicative thereof; and apparatus to receive the outputs and to determine therefrom the angular position, rotational speed, and/or acceleration of the rotatable member.

REFERENCES:
patent: 2536805 (1951-01-01), Hansen, Jr.
patent: 3575616 (1971-04-01), Jordan
patent: 3805161 (1974-04-01), Bayha et al.
patent: 4481469 (1984-11-01), Hauler et al.
patent: 4562399 (1985-12-01), Fisher
patent: 4646011 (1987-02-01), Wallrafen
patent: 4739263 (1988-04-01), Mohri et al.
patent: 5252919 (1993-10-01), Uemura

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