Electricity: measuring and testing – Magnetic – Displacement
Patent
1983-04-04
1986-09-16
Karlsen, Ernest F.
Electricity: measuring and testing
Magnetic
Displacement
338 32H, G01B 714
Patent
active
046125027
ABSTRACT:
A magnetic measuring instrument for measuring the relative position of two objects includes a scanning unit which incorporates a magnet positioned to scan a measuring division. The measuring division is provided with alternately magnetically conducting and magnetically non-conducting zones. Measuring signals of high signal quality are generated because the induction generated by the magnet in the measuring division runs only in planes perpendicular to the longitudinal extent of the measuring division (the measuring direction x). Magnetic field sensitive sensor elements in the air gap between the magnet and the measuring division scan the air gap induction to generate position dependent measuring signals.
REFERENCES:
patent: 3956793 (1976-05-01), Pomplas
patent: 4039936 (1977-08-01), Jones et al.
patent: 4384252 (1983-05-01), Kolter
Inductosyn, Dr. Johannes Heidenhain GmbH, Traunreut, West Germany, Document 151 20 2/78 1E.
Die Numerische Steuerung Von Werkzeugmaschinen (Wilhelm Simon), Carl Hanser Verlag Munchen 1971, pp. 118-121.
Synchro and Resolver Conversion, edited by Geoffrey S. Boyes, Memory Devices Ltd., copyright 1980, pp. 1-10.
Dr. Johannes Heidenhain GmbH
Karlsen Ernest F.
Snow Walter E.
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