Abstract: A puck for a three-dimensional magnetoelastic force transducer, with a cylindrically-shaped body having a circular cross-section, a semi-spherically-shaped first end surface and a second end surface having an annular flange with an outer diameter corresponding to the diameter of the circular cross section of the body; the body comprising a substantially solid magnetoelastic material with a center axis extending between the middle of the first and second bottom surfaces; the body having at least three force-measuring zones equidistantly spaced from the center axis and symmetrically distributed within the body; each of the at least three force-measuring zones having respective holes for receiving excitation and measuring windings; and force transmission paths extending between the intersection of the center axis and the first end surface, the intersection forming a point of application of force to the force transducer, and each of the at least three force-measuring zones to the annular flange.

Abstract: A magnetoelastic force transducer which is compensated for sensitivity drift is provided with a measuring transducer and a reference transducer (1) of the same material. In its simplest form the reference transducer may consist of a toroid. The two transducers are arranged in good thermal contact with one another. The reference transducer is arranged with a winding (2) for excitation with a current which at each moment is proportional to the supply current of the measuring transducer, and with a winding (3) for delivering a reference signal (U.sub.r) proportional to its magnetic flux. The output signal of the reference transducer is rectified in a phase-sensitive rectifier, the output signal of which is compared with a constant reference voltage. The deviation controls the phase position of the control voltage of the rectifier in such a way that the output signal of the rectifier is caused to correspond to the reference voltage.

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.