Inductive coupling position sensor method and apparatus having primary and secondary windings parallel to each other
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United States of America Patent
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-
Jul 30, 1991
Issued Date -
N/A
app pub date -
Oct 26, 1989
filing date -
Jan 11, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A position sensing device including two spaced conductive coils constituting a primary and secondary winding of a transformer. A coupling member is mounted to a moveable object such as an automobile steering mechanism and moves relative the primary and secondary windings. This movement adjusts or alters the transformer coupling between the primary and the secondary and produces a variable output signal which can be correlated through use of appropriate circuitry to the position of the moveable member. Two alternate designs are disclosed. In a first design, the transformer primary and secondary are disposed side-by-side and the coupling member slips over the primary and secondary for relative linear movement. In a second design, the primary and secondary are disposed one within the other and the coupling member fits within a gap between the primary and secondary.
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