Linear positioning system utilizing helically polarized magnet
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United States of America Patent
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Jun 6, 2017
Grant Date -
Sep 3, 2015
app pub date -
Mar 3, 2014
filing date -
Mar 3, 2014
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Abstract
A system includes a helically polarized magnet having a plurality of north and south poles circumferentially and helically patterned along a linear axis. Magnetic flux varies at different positions along a linear path in a direction aligned with the linear axis. A multi-axis magnetometer and/or magnetometer array is configured with at least two sensing coils to detect the position of the helically polarized magnet by sensing the magnetic flux variations at the different positions along the linear path.
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