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.
Original language | Undefined |
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Pages (from-to) | 969-971 |
Number of pages | 3 |
Journal | IEEE transactions on magnetics |
Volume | 20 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1984 |
Keywords
- SMI-TST: From 2006 in EWI-TST
- IR-55582
- EWI-5434
- SMI-REC: RECORDING