Patent ID: 7584672
Filing Date: 2009-09-08
Classification: G01L

Abstract:
1. A magnetostrictive torque sensor, comprising: a rotating shaft to rotate around a center axis, the rotating shaft comprising magnetostrictive characteristics; a cylindrical magnetic core formed around said center axis at a predetermined distance from an outer periphery of the rotating shaft; a flexible substrate coil disposed on an entire inner periphery of the cylindrical magnetic core such that said flexible substrate coil has a width in an axial direction that is equal to a width in the axial direction of said cylindrical magnetic core, the flexible substrate coil comprising: a bridged circuit comprising said first and second cylindrical detection coil layers, wherein a circumference of an outer surface of the flexible substrate coil and a circumference of an outer surface of the first cylindrical detection coil layer is equal to a circumference of the entire inner periphery of the cylindrical magnetic core.