Inductive sensor and method for detecting displacement of a body

Details Inductive sensor and method for detecting displacement of a body Inductive sensor and method for detecting displacement of a body

1995-02-14

1997-05-27

Fulton, Christopher W.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33513, 433 27, G01C 906

Patent

active

056320930

ABSTRACT:
An inductive sensor is comprised of a sealed housing; at least one current path disposed in the housing; means for applying current to the current path; variable low reluctance magnetic path about the current path; and means for sensing the output from the current path as a function of variations in the magnetic flux path. Alternative current path configurations include a differential transformer, comprised of a permanent magnet or one or more primary coils in conjunction with two secondary coils, or a voltage divider, comprised of two primary coils. The variable magnetic flux path includes ferromagnetic fluid disposed in the housing to a level at which all coils are at least partially submersed. Tilt or other displacement of the sensor results in a change in the amount of fluid contacting the coils and a resultant change in current output from the current path means. The change in sensed voltage is indicative of displacement and sustained output voltage is proportional to the degree of tilt of the sensor.

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