Arrangement for non-contacting measurement of static and dynamic

Details Arrangement for non-contacting measurement of static and dynamic Arrangement for non-contacting measurement of static and dynamic

1983-02-17

1985-03-12

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

324209, G01L 310

Patent

active

045037140

ABSTRACT:
A torque sensor is used for non-contacting measurement of torques in accordance with the eddy current principle. This sensor is arranged closely in front of the surface of the test object (shaft). The torque is determined on the basis of permeability changes in the surface of the test object material. There is a state of dependence between the measuring voltage and the distance of the torque sensor from the test object. As the distance increases, the measuring voltage decreases. The measuring voltage acquires a substantial distance independence by virtue of the exciting winding of the torque sensor forming with a capacitor a resonant oscillatory circuit tuned to the exciting frequency.

REFERENCES:
patent: 2370845 (1945-03-01), Davis
patent: 2553833 (1951-05-01), Rifenbergh
patent: 2557393 (1951-06-01), Rifenbergh
patent: 2896446 (1959-07-01), Lewis
patent: 3866462 (1975-02-01), Fraudin
patent: 4106334 (1978-09-01), Studtmann

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