水泵微弱故障信号的检测

Measurement of faint vibration signal in water pump

噪声是影响水泵早期故障诊断正确性的主要因素.利用小波变换对水泵的噪声信号进行多层次分解,并根据相邻层小波系数相关性进行滤波,该法可以对信号进行良好的降噪,同时也不会弱化信号中的弱故障信号.通过对水泵早期故障信号分析,结果表明,小波域相关滤波法对水泵早期故障诊断是有效的.

Noise is the biggest obstacle that makes the wavelet transform, the noise of water pump is the incipient fault diagnosis results uncorrected. Using decomposed in many scales. And then be fileted according to the correlations of wavelet coefficients in close layer. By selecting the process parameters adaptively, WTDCF can de-noise signal efficiently. More important, the faint component in the signal will become stronger compared with the noise component. According to the analysis of the fault signal in water pump, results show that WTDCF method is effective for water pump incipient fault diagnosis.