Bearing vibration noise detection method

• Main Authors: ZHANG SHANLIN, ZHENG JIAKUN, LI YAHUI, DONG CHUNCHAO, CHEN NAIJIAN, YIN XUNRUI
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2023
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention relates to a bearing vibration noise detection method. The method comprises the following steps: collecting and preprocessing a bearing vibration noise signal; selecting a wavelet function and a decomposition layer number of wavelet packet decomposition according to the characteristics of the vibration signal of the bearing to be measured; bottom layer nodes of wavelet packet decomposition are reordered; drawing a wavelet packet energy spectrum by analyzing and calculating the wavelet packet coefficient and energy of each frequency band, and solving the proportion of the energy of each frequency band to the total energy of the signal; signals are reconstructed through a wavelet packet reconstruction algorithm, so that the signal-to-noise ratio is increased, and spectral analysis is facilitated; by analyzing the waviness and the vibration characteristic frequency of each part of the bearing, the relationship between the reconstructed signal frequency and the vibration characteristic frequency is