INDUCTANCE MOTION SENSOR Russian patent published in 2009 - IPC G01B7/00 

FIELD: physics, measurement.

SUBSTANCE: invention is related to metering equipment. Inductance motion sensor comprises two inductances (1,2), arranged in the form of flat rectangular meanders applied onto dielectric plates (3, 4). Inductances (1, 2) are located parallel to each other with shift by quarter of meander period. On one side inductances are connected to each other by flexible conductor (15), and on the other side - with capacitor (7) to arrange oscillating circuit in composition of transistor AC voltage generator (8). Relative linear displacement of dielectric plates (3, 4) causes variation of total inductance of sensor, resonance frequency of oscillating circuit and output frequency of AC voltage generator (8).

EFFECT: higher accuracy of motion measurement.

3 cl, 1 tbl, 5 dwg