Patent ID: 7812597
Filing Date: 2010-10-12
Classification: G01D

Abstract:
1. A magnetic motion sensor comprising: a coil having a length, surrounding a ferromagnetic core and including at least first and second superimposed winding layers which are wound about the ferromagnetic core in opposite directions and define adjacent segments over the length of the coil which have substantially like widths and constant winding densities, the winding densities of the segments of the first winding layer increasing linearly over a length of the sensor, the winding densities of the segments of the second winding layer decreasing linearly over the length of the sensor, a sum of the windings of all winding layers over the width of each segment being approximately the same, a magnet that is movable relative to the coil in a longitudinal direction of the coil and causes a magnetic saturation of the ferromagnetic core in an associated zone, and an evaluation unit operatively coupled with the coil and adapted to generate a position signal in dependence on a position of the movable magnet along the coil.