Speed sensor having a closed magnetic flux path for sensing spee

Details Speed sensor having a closed magnetic flux path for sensing spee Speed sensor having a closed magnetic flux path for sensing spee

1991-07-18

1992-05-05

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

310168, G01P 3488

Patent

active

051111381

ABSTRACT:
Speed sensor utilizing a stator which includes two circumferentially spaced elements which are interconnected by a low magnetic permeability member. The elements have alternating regions which provide a variation in magnetic permeability. A rotor which is arranged for rotation about a rotational axes includes alternating regions of magnetic permeability which interact with the stator. A magnet is located between the elements of the stator and the structural interconnection therebetween. A coil of wire is placed around the structural interconnecting member to sense variations in magnetic field which are caused by the change in reluctance as the respective regions of magnetic permeability of the elements and rotor pass one another.

REFERENCES:
patent: 2304866 (1942-12-01), Wall
patent: 3230407 (1966-01-01), Marsh
patent: 3619678 (1971-11-01), Ruof
patent: 3939416 (1976-02-01), Maskery
Nemier et al., Transducer Pickup, IBM Technical Disclosure Bulletin, vol. 19, No. 4, Sep. 1976, pp. 1197, 1198.

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