| 摘要 |
PROBLEM TO BE SOLVED: To obtain a torque detecting device capable of improving accuracy in detecting torque, reducing the effects of temperature and disturbance magnetic fields affecting detection results, and further being externally installed easily. SOLUTION: The torque detecting device is constituted of a cylindrical shaft 1, a magnetic impedance element 2 arranged along the radial direction of the shaft 1 at a distance from the peripheral surface of the shaft 1 to generate a voltage (e) corresponding to an external magnetic field H0, a bias magnetic field coil 4, a D.C. power source 5, and an A.C. power source 6. The toque detecting device comprises an element driving circuit 3 to drive the magnetic impedance element 2 and an arithmetic circuit 9 to obtain torque acting on the shaft 1 on the basis of the voltage (e) amplified by an amplifier 8.
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