Apparatus for detecting motion and direction using magnetoresist

Details Apparatus for detecting motion and direction using magnetoresist Apparatus for detecting motion and direction using magnetoresist

1983-07-01

1986-12-16

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Displacement

338 32R, 340672, G01B 714, G08B 2100, H01L 4300

Patent

active

046299823

ABSTRACT:
A motion sensing means including a sensor head having a pair of magnetoresistive elements spaced apart less than one-half and preferably one-quarter of the wavelength of a cyclically varying characteristic of a body which is to have its motion sensed, processing means for deriving a sum signal and a difference signal from the sensing elements, and output means which receives the sum and difference signals and produces signals indicative of the direction of motion, velocity and relative position of the sensed body.

REFERENCES:
patent: 4039936 (1977-08-01), Jones et al.
patent: 4468618 (1984-08-01), Zander

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