Method and device for the faultless measurement of torque on a shaft

摘要

Method and device for the faultless measurement of torque on a shaft by means of the determination of the relative twist between two separated points on the shaft caused by a torque acting, the measuring signals indicating rotation of the shaft being picked up with a predetermined phase difference at each of these points in a plane respectively perpendicular to the shaft with the aid of two fixed sensors, the sensors being aligned in a plane to those of the other plane in such a way that the measured signals of the one plane have a phase difference with respect to those of the other plane which is different from the phase difference from the signals of one plane, phase differences of 180@ being excluded. According to an equivalence or antivalence function, a logical coupling is then made, first of the measured signals of one plane, converted into pulse signals, and then of the coupled signals of both planes, phase shifts caused both by mechanical displacements and also by offset being compensated in the averaged output signal and the mean value of the torque being indicated faultlessly.