Abstract: To reduce hysteresis effects on the output of a magnetoelastic torque transducer subjected to possible overloads, the transducer is constructed with a measuring sleeve which is rigidly attached by its ends to a surrounded measuring axle. A yielding region in which the material of the sleeve deforms plastically relative to the axle in case of an overload is provided between the measuring zones where the magnetoelastic stresses in the measuring sleeve are sensed. A ring of holes can provide a suitable yielding region.

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.