Abstract
In order to acquire the vibration information in 2-dimensional space, it was thought that vibrations in two axes should be simultaneously measured using two sensors. When vibrations in many directions are measured using the vibration pickup of a single axis, there is no simultaneity between the measured data. For this reason, it was thought that 2-dimensional measurement could not be performed. This paper reverses this common sense. In this paper, the RMS values in three places are measured at time to differ using the vibration pickup of a single axis, and the theoretical elucidation for obtaining the vibrating action in 2-dimensional space only from the measured values is performed. Next, we verify that the theory is correct by measuring the vibration of rotating machine which unbalance has generated. The display method of the vibration information in 2-dimensional space as a combination of elliptical orbits for every frequency component is proposed. On the orbit of vibration with two or more frequency components, the method of determining the rotation direction using the measured vibrating waveform is also proposed.
