The Measurement Method of Big Torque Moments in Drive Shafts

Abstract

When a shaft diameter is big, and consequently a transmitted torsion torque is considerable, it is recommended that the shaft itself be used as an elastic element of a converter. There are a lot of methods of measuring a shaft torque (among others: an exensometric, inductive, phase-metric and capacitive one); in each of them a number of sensors can be used e.g. a strain gauge, string sensor, differential choke sensor, torsiometric sensor etc. However, specific operational requirements, in this case connected with the creation of big drive torques, sometimes decide not only the construction of a given equipment or measuring unit but also the choice of a physical principle of its operation, i.e. the choice of phenomena upon which the signal processing during the measurement is based.