Magnetoresistive transducer for absolute position detection


Groenland, J.P.J. (1984) Magnetoresistive transducer for absolute position detection. IEEE Transactions on Magnetics, 20 (5). pp. 969-971. ISSN 0018-9464

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Abstract:In this paper a new method is presented for the measurement of absolute linear or angular position. The digital position information is recorded serially into one track of a suitable hard-magnetic medium. The stray field of this information layer determines the angular magnetisation distribution in a ferromagnetic (permalloy) detection strip which is positioned parallel to the track but with its plane perpendicular to the hard-magnetic layer. The bit pattern representing the position co-ordinate is regained by detection of the planar magnetoresistance effect in the sensor strip. Experiments have been performed using sensors with a resolution of 250 ¿m and 1 mm respectively and longitudinally recorded audio tape. Suitable sensor output signals could be measured without hysteresis.
Item Type:Article
Copyright:© 1984 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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