US 7,321,229 B2 | ||
Inductive position sensors with secondary windings with increased or decreased number of turns | ||
Jonathan Craig Tapson, Cape Town (South Africa) | ||
Assigned to University of Cape Town, Cape Town (South Africa) | ||
Filed on Feb. 21, 2006, as Appl. No. 11/358,905. | ||
Application 11/358905 is a continuation of application No. PCT/ZA2004/000101, filed on Aug. 20, 2004. | ||
Claims priority of provisional application 60/496554, filed on Aug. 20, 2003. | ||
Prior Publication US 2006/0208725 A1, Sep. 21, 2006 | ||
Int. Cl. G01B 7/14 (2006.01) |
U.S. Cl. 324—207.17 [324/207.24; 336/130; 340/870.36; 318/660] | 12 Claims |
1. A position sensor comprising:
a primary winding configured to generate a magnetic flux;
a first secondary winding comprising a number of turns which increases in one direction;
a second secondary winding comprising a number of turns which increases in an opposite direction to that of said first secondary
winding;
said first secondary winding and said second secondary winding being subjected to a magnetic flux generated by said primary
winding wherein voltages are induced in said first secondary winding and said second secondary winding; and,
an element movable with respect to said first secondary winding and said second secondary winding, wherein said element comprises
a magnetic or conductive material and distorting, in its vicinity, said magnetic flux generated by said primary winding.
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