Patent ID: 9070873
Filing Date: 2015-06-30
Classification: G01L,H01L

Abstract:
1. A combination torque and angular position sensing system comprising, a shaft, a circumferentially-magnetized, magnetostrictive ring of ferromagnetic material, the ferromagnetic material further magnetized so as to form a plurality of distinct, localized magnetic regions wherein each of the distinct, localized magnetic regions is characterized by a magnetic-field-orientation differing from that of the circumferentially-magnetized, magnetostrictive ring, the magnetostrictive ring connected to the shaft; a first sensor configured to measure variation of magnetic field emanating from the plurality of distinct magnetic regions, the variation of magnetic field in accordance with shaft rotation; and a second sensor configured to measure variation of magnetic field emanating from the circumferentially-magnetized, magnetostrictive ring in accordance with torque applied to the shaft.