Method and apparatus for measuring torque

Details Method and apparatus for measuring torque Method and apparatus for measuring torque

1981-09-14

1983-11-22

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

7386228, 324209, G01L 310

Patent

active

044161611

ABSTRACT:
A magnetic field is generated in the vicinity of a rotatably driven, loaded shaft. A Wiegand device in the shaft is differentially displaced by twisting of the shaft. Changes in magnetization in the regions during rotation of the shaft are detected by a coil. The characteristics of the pulses generated by the coil are representative of the twisting of the shaft and accordingly the torque transmitted thereby. A first signal is derived, which is representative of a characteristic of the generated pulses and a second signal is derived, which is representative of the period of the changes in magnetization. Power is represented by the quotient of the first signal divided by the second signal.

REFERENCES:
patent: 2511178 (1950-06-01), Roters
patent: 2566566 (1951-09-01), Howes
patent: 3427872 (1969-02-01), Leep et al.
patent: 3783370 (1974-01-01), Birdwell et al.
patent: 3861206 (1975-01-01), Kawafune et al.
patent: 4106334 (1978-08-01), Studtmann

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