Inductive position sensor

Details Inductive position sensor Inductive position sensor

1983-05-13

1985-03-26

Pellinen, A. D.

Inductor devices

Relatively movable coils

336118, 336132, H01F 2104

Patent

active

045076391

ABSTRACT:
A non-contacting position sensor has an exciting coil in a plane and has a sensing coil in an intersecting plane so sensing coil portions are symmetrical around an exciting coil portion in mutually inductive relation to that portion of the exciting coil portions. A ferrite member magnetically shields those sensing coil portions from other portions of the exciting coil and a housing mount the sensor for relative movement with respect to magnetically permeable or electrically conductive inductance-modifier on an object whose position is to be monitored. Movement of the inductance-modifier as the object moves modifies mutual inductance between the respective sensing coil portions and the exciting coil portion so that, when the exciting coil is driven, the sensing coil provides a signal representative of the object position. If desired, an additional sensing coil is disposed in a third plane to provide X-Y position sensing. The inductive position sensor provides a reversal in output signal polarity when the object moves through a selected position where digital output may be required. The sensor regulates operating parameters of an automobile in response to change in position of an automotive component.

REFERENCES:
patent: 2118040 (1938-05-01), Durkee et al.
patent: 2941170 (1960-06-01), McCoy

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