Electricity: measuring and testing – Magnetic – Displacement
Patent
1990-07-23
1991-04-02
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Displacement
G01B 714
Patent
active
050049828
ABSTRACT:
A scale is fixed to one part of a position determining apparatus, and a read head is relatively movable on the other part of the apparatus. Incremental scale marks are regularly spaced along the scale and are counted in a counter to give an indication of relative position of the scale and read head. The marks may for example be recorded magnetically. Some scales are distinguishable from the other, e.g., by having different amplitudes. Positioning information can then be encoded in a binary word. This can either be absolute position values, or error correction information.
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patent: 4787255 (1988-11-01), Guay
Chaney Raymond J.
McMurtry David R.
Wilson David
Edmonds Warren S.
Eisenzopf Reinhard J.
Renishaw plc
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