BEARING FAULT DIAGNOSIS FOR DIESEL ENGINE GENERATOR USING LABVIEW

摘要

A bearing fault diagnosis for a diesel engine generator is provided to allow for ease of diagnosis by comparing the integrated value of FFT frequency spectrum of vibration signal with a normal integrated value. A bearing fault diagnosis system includes accelerating speed sensors(2) attached in X, Y and Z-axis directions onto a housing(1) to obtain vibration signals; and a DAQ board(3) for collecting the signals. The collected signals are interpreted by an algorithm programmed by LabVIEW. The vibration signal is filtered by a low pass filter(4), and FFT converted. FFT-converted spectrum data is used in computing a graph area by a function(7) for calculating integrated value. The integrated value is indicated on an integrated value indicator, and compared with a threshold value. If the threshold value is smaller than the measured value, a normality display lamp is turned on. If the threshold value is larger than the measured value, a abnormality display lamp(10) is turned on.