Torque sensor

Details Torque sensor Torque sensor

1981-06-01

1983-11-15

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

73DIG2, 324209, G01L 310

Patent

active

044148550

ABSTRACT:
A torque sensor device for sensing the torque applied to a drive shaft and for producing an electrical signal representative of the applied torque. The sensor includes a non-magnetic drive shaft having a magnetic layer affixed to its outer surface. The magnetic permeability of the magnetic layer changes due to torque applied to the shaft. The permeability of the magnetic layer is detected and converted to an electrical signal representative of the torque applied to the drive shaft. The magnetic layer takes the form of one or more elongated ribbons of magnetic material helically wound about the surface of the drive shaft. Alternatively, the magnetic layer is formed from a plurality of segments of magnetic material affixed to the periphery of the shaft. Magnetically soft amorphous metal material is preferably used to form the magnetic layer.

REFERENCES:
patent: 2557393 (1951-06-01), Rifenbergh
patent: 2867118 (1959-01-01), Cavanagh
patent: 3501950 (1970-03-01), Hohenberg
patent: 3861206 (1975-01-01), Kawafune et al.
Mohri et al., "New Force Transducers Using Amorphous Ribbon Cores", IEEE Transactions on Magnetics, vol. Mag-14, No. 5, Sep. 1978, pp. 1071-1075.
R. A. Beth & W. W. Meeks; "Magnetic Measurement of Torque in a Rotating Shaft;" The Review of Scientific Instruments; vol. 25, No. 6, Jun. 1954 pp. 603-607.
O. Dahle; "Pressductor and Torductor--Two Heavy-Duty Transducers;" IEEE Int. Conference on Non-linear Magnetics, Apr. 1963.

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