Patent ID: 7882753
Filing Date: 2011-02-08
Classification: G01L

Abstract:
1. A magnetostrictive torque sensor comprising: a power supply voltage; a first damping resistor; first and second magnetostrictive portions mounted on a shaft and having different magnetic anisotropic properties; a first detecting coil disposed in facing relation to the first magnetostrictive portion; a second detecting coil disposed in facing relation to the second magnetostrictive portion; a second damping resistor; a switching device, wherein the first damping resistor, the first detecting coil, the second detecting coil, the second damping resistor, and the switching device are connected in series in this order between the power supply voltage and a ground; and a torque detector, wherein the torque detector detects a torque applied to the shaft based on a potential at a junction between the first detecting coil and the second detecting coil.