摘要
本文论述了小波变换在声发射信号的事件计数特征参数检测中应用的理论和方法。用小波变换来检测声发射信号的事件计数特征参数 ,其准确率与域值电平的取值大小无关 ,从而可大大提高声发射信号特征参数检测的准确率。该方法可用于旋转机械 (特别是大型汽轮发电机组 )的碰磨故障和裂纹故障的检测。
WT5BZ]The theory and methods of application of waelet transform in detecting event count rate of acoustic emission signals are studied in the thesis.With wavelet transform,the accuracy of feature of feature parameter detecting of emission signal has nothing to do with threshold level switch,so the sensitivity of feature parameter detecting of emission signals is improved.The methods proposed in the thesis can be used to detect rubbing and crack faults of rotating mechinery (especially large turbo_generators). [WT5HZ]
出处
《振动与冲击》
EI
CSCD
北大核心
2001年第2期67-68,81,共3页
Journal of Vibration and Shock
