Magetoelastic force transducer

Details Magetoelastic force transducer Magetoelastic force transducer

1988-04-29

1989-04-25

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

73DIG2, G01L 112

Patent

active

048236217

ABSTRACT:
A magnetoelastic force transducer comprising two identical, cylindrical bodies defining a hollow magnetic core and held together by means of a force-transmitting stud bolt has its measuring and excitation windings located in the core. The interior of the core is constructed such that a thin cylindrical tubular wall is formed opposite to a respective measuring winding in each one of the bodies, whereby when the core is force-loaded via the stud bolt a compressive stress arises in one of these tubular walls and a tensile stress arises in the other. To eliminate a possible measurement signal at zero applied force a magnetically asymmetric center pole in the form of a punched disk of a soft-magnetic material and having the same diameter as the core and having a foil of a similar material secured on one side is located between the bodies. The hickness of the foil determines the magnitude of the signal adjustment.

REFERENCES:
patent: 1906551 (1933-05-01), DeForrest
patent: 3197722 (1965-07-01), Chauss
patent: 4192394 (1980-03-01), Simpson

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