Magnetoelastic force-measuring device

Details Magnetoelastic force-measuring device Magnetoelastic force-measuring device

1989-06-05

1990-09-11

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

324209, 336 20, G01L 112

Patent

active

049552414

ABSTRACT:
A magnetoelastic force-measuring device is proposed which has an annular thrust body possessing magnetostrictive properties and bearing a ring coil. To enhance the measuring sensitivity in conjunction with simultaneous good thermal error compensation, a sleeved tension body, likewise possessing magnetostrictive properties and bearing a ring coil, is arranged coaxially in the annular thrust body to fit in such a way that, given the introduction of a force, the one body is subjected to thrust and the other to tension. In this connection, the magnetostrictive properties are formed by a soft magnetic measuring film--preferably of amorphous metal--which applied in each case to the body, and the two ring coils are connected up to make an inductive half-bridge.

REFERENCES:
patent: 1906551 (1933-05-01), DeForest
patent: 4802368 (1989-02-01), Nordvall

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