Lightweight torquemeter and torque-measuring method

Details Lightweight torquemeter and torque-measuring method Lightweight torquemeter and torque-measuring method

1983-09-02

1985-06-18

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

324209, G01L 310

Patent

active

045234825

ABSTRACT:
A torquemeter 10 comprising a magnetostrictive element 12 which is formed in the shape of a ribbon upon the surface of the subject rotating member 14 and is capable of producing internal, avalanche Barkhausen reversals, permanent magnets 16 and 18 positioned adjacent to the subject rotating member 14 for successively triggering the avalanche Barkhausen reversals in the magnetostrictive element and for resetting the magnetostrictive element after each reversal, a pickup coil 20 for generating signals responsive to the avalanche Barkhausen reversals and a readout circuit 22 in communication with pickup coil 20 for correlating the responsive signals to an indication of the level of torque and/or power in the subject rotating member 14.

REFERENCES:
patent: 3427872 (1969-02-01), Leep et al.
patent: 3783370 (1974-01-01), Birdwell et al.
patent: 3861206 (1975-01-01), Kawafune et al.
G. M. Walker, "Wiegand's Wonderful Wires", Popular Science, May 1979.
Wiegand Effect Design Guide, Sensor Engineering Co., Jan. 1979.

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