The vibrations generated by the rolling bearings have a significant impact on the quality, durability and reliability of the machines and mechanical devices. In addition, the bearings can be a source of vibrations which intensify the loudness of devices and produce significant and adverse reactions. The basic parameters describing the amplitude of the vibration of rolling bearings are: displacement, velocity and acceleration. In the global bearings technology especially favored by manufacturers, are measurement systems to measure the velocity of vibration. The level of vibration (which is determined by measuring the amplitude of velocity) can be expressed in specific units closely related to the rotational speed of the bearing. This unit is Anderon (linear unit, expressed in microns per second) or less used VL (logarithmic unit). Recently, for measurements of velocity of roller bearings vibrations are applied not only electrodynamic sensors, but also a laser vibrometers. To juxtapose the results obtained by various methods and devices, it is necessary to conduct comparative researches.
Adamczak, S., Stȩpień, K., & Wrzochal, M. (2017). Comparative Study of Measurement Systems Used to Evaluate Vibrations of Rolling Bearings. In Procedia Engineering (Vol. 192, pp. 971–975). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2017.06.167