Device for positional and/or length determination
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United States of America Patent
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Dec 12, 2006
Issued Date -
N/A
app pub date -
Jul 30, 2003
filing date -
Jul 30, 2002
priority date (Note) -
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Abstract
A device for positional and/or length determination comprising a carrier unit with an absolute magnetic length coding and a measuring unit that co-operates with the carrier measuring unit and can be displaced in relation to the latter. The measuring unit has a magnetic sensor unit (Sci, Sfi) and can be connected to an electronic evaluation unit (18 to 32) that is located downstream of the measuring unit. The elongated, rod-shaped carrier unit (10) is provided with one track of preferably radially magnetized length coding, a plurality of coding sections comprising periodic pole divisions is provided along the length coding and coding sections of a first polarity alternate with coding sections of a second polarity along the carrier unit, in such a way that a maximum of two coding sections of the same polarity lie directly adjacent to one another.
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