Patents Assigned to Azuma Shokai Co., Ltd.
  • Magnetostrictive torque sensor and torque detection method
    Patent number: 7997152
    Abstract: A magnetostrictive torque sensor that detects a torque of a rotating shaft and/or a stationary shaft by using a magnetostriction inverse effect that occurs on a shaft surface, the magnetostrictive torque sensor includes a first detection coil, a second detection coil, a first oscillation circuit, a second oscillation circuit, a first direction magnetic permeability detector, a second direction magnetic permeability detector, and a torque detector.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: August 16, 2011
    Assignee: Azuma Shokai Co., Ltd.
    Inventors: Kazuhiro Yamakawa, Tetsuo Kanda