Torque detecting apparatus

Details Torque detecting apparatus Torque detecting apparatus

1989-01-25

1990-01-09

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

G01L 310

Patent

active

048919926

ABSTRACT:
A torque detecting apparatus utilizing a magneto-elastic effect including a magnetic metal thin strip fixed on the circumferential surface of a torque transmitting shaft as an object of torque detection, an induced magnetic anisotropy given in advance to the magnetic metal thin strip, the induced magnetic anisotropy appearing in a direction of a principal stress produced in the magnetic metal thin strip when a torque is imposed on the torque transmitting shaft, a shape magnetic anisotropy of the magnetic metal thin strip caused by a shape of the magnetic metal thin strip, the shape magnetic anisotropy appearing in a direction forming an angle of 45.degree. with the direction of the principal stress, and detection means for detecting a change in magnetic anisotropy produced in the magnetic metal thin strip by a torque imposed on the torque transmitting shaft.

REFERENCES:
patent: 4627298 (1986-12-01), Sahashi et al.
patent: 4750371 (1988-06-01), Kobayashi et al.
patent: 4762008 (1988-08-01), Kobayashi et al.
Sasada et al.-"Torque Transducers with Stress-Sensitive Amorphous Ribbons . . . ", IEEE Trans. on Magn., MAG-20, No. 5, Sep. 1984, pp. 951-953.

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