Patent ID: 9157768
Filing Date: 2015-10-13
Classification: G01D

Abstract:
1. A position detecting system comprising: a first sensor having a first coil, and a second sensor having a second coil: the first and second coils generating respective first and second time varying magnetic fields, with respective pluralities of first and second magnetic field vectors that intersect a first sensing domain area of the first target plane, each vector having a normal component that lies orthogonal to the plane and a tangent component that lies parallel to the plane, a magnitude of the normal component being substantially greater than a magnitude of the tangent component, an orientation of the normal component matching an orientation of the first and second time varying magnetic fields at an intersection of the longitudinal axis and the plane; a first conductive target movable within the first target plane, some portion of the target lying within the first sensing domain area, such that the series-combined inductance of the first and second coils changes as the target moves within the first sensing domain area of the first target plane; and a support structure connected to the first sensor, the second sensor, and the target.