Apparatus for certification of angular-displacement transducers

An apparatus for determining the accuracy of inductive, photoelectric, and other angle-to-code converters with angular displacement transducers is examined. The operation of the various test stands for this purpose is based on measuring the electric output pulse signals from the sample transducers and a reference transducer and recording them in the form of phase difference diagrams, while the shafts of both transducers rotate synchronously, then determining the error of the sample transducer from those diagrams superposed on one another so as to correspond to the same angular position of both shafts. The mechanical components of such a test stand include an electric drive motor with speed regulation, a belt transmission, a worm gear for speed reduction, a flexible coupling, a bellows, a stator fixture, a centering mechanism, an index dial, a digital counter, and a tape winder. Prototypes of such a test stand were checked against a special phase meter with a kinematometer. These tests stands were found to be adequate for certification of transducers in the 1-2 precision class.