New method of metrological evaluation of industrial rolling bearing vibration measurement systems

Abstract

The paper concerns a new method for evaluating industrial rolling bearing vibration measurement systems. The aim of the research performed was to evaluate the measurement accuracy of three measurement systems, which differ from each other in the key design features of the functional components. For this purpose, an additional reference point was used, which was a laser Doppler vibrometer. The use of an additional reference point made it possible to decouple the vibration measurement indications from spontaneous changes in the dynamic state of the rolling bearings. The newly suggested procedure was carried out in two stages. In the first stage, vibration spectra obtained from the independent sensor were analysed, while in the second stage, system indications were compared with reference sensor indications to assess measurement accuracy. The results obtained made it possible to identify the most accurate system, to assess the design of the components of the devices tested, as well as to detect undesirable factors undermining the accuracy of the measurement, and to obtain hints for improving the accuracy of industrial rolling bearing vibration systems.