EDDY CURRENT SENSOR DEVICE FOR MEASURING A LINEAR DISPLACEMENT

The present invention relates to an eddy current sensor device for measuring a linear displacement of a boundary of a conductive element in a sensing plane. The sensor device (100) comprises a sender member (110) for emitting a magnetic field. Further, the sensor device comprises a central position sensing member (200) for outputting a central position signal dependent on the linear displacement of the boundary of the conductive element, the central position sensing member comprising a pair of central sense coils (210, 220) each being formed by a plurality of turns, wherein the turns of each central sense coil being arranged side by side along a linear axis (X) in the sensing plane thereby covering a measurement range. Further, the sensor device comprises an edge position sensing member (300) for outputting an edge position signal dependent on the linear displacement of the boundary of the conductive element, the edge position sensing member comprising a pair of edge sense coils (310, 320) each being formed by a plurality of turns, the turns of each edge sense coil being arranged side by side along the linear axis in the sensing plane for increasing the measuring accuracy of the measurement range. Further, the number of turns of each of a central sense coils and the edge sense coils is odd.