Magnetic position sensing techniques
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Dec 7, 2000
filing date -
Mar 31, 1998
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Expired
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Abstract
A method of sensing the position of a first element with respect to a second element is disclosed, the first element being movable with respect to the second. The method comprises: (a) fixing a first magnetic marker to said first element; (b) fixing a second magnetic marker to said second element; (c) sensing the positions of the two markers by a remote magnetic sensing technique. Optionally, a third magnetic marker may be used, the second and third markers then preferably being located at the extremes of travel of said first element. The method may be used to determine linear or angular relationships.
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