INDUCTANCE SENSOR OF LINEAR MOVEMENTS Russian patent published in 2013 - IPC G01B7/14 G01D5/22 

FIELD: measurement equipment.

SUBSTANCE: sensor comprises a coil with a movable core made of a ferromagnetic material. The core is connected mechanically with a monitored object by means of a steel non-magnetic stem. The coil excitation winding is made with a wire by turn winding along the entire length of the sensor travel. Two measurement windings are made above the excitation winding and connected back to back. In the steel non-magnetic stem there are four longitudinal slots symmetrically relative to the axis.

EFFECT: increased symmetry of output characteristic under high values of sensor travel.

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