To Identify for Diesel Signals with Strong Noise Based on Wavelet
Zhang Zhi-pei · Transactions of Csice · 2001
The shielding noise meausres based on the wavelet,such as the threshold values of wavelet transformation coefficient and wavelet decomposing,are introduced in the paper.To the former the four different rules to make the threshold values are giving,to the latter the disperse wavelet transform based on the similar-Mexican hat is giving.The former measure is used to shield the noise of high pressure signal in diesel thick-wall pipeline detected by the strain gauge,the latter measure is used to shield the noise of diesel body vibration signal with the fault characteristic of compressing ring sticking.The results show us that the shielding noise measures based on the wavelet can get rid of the noise in signal,reappearance the high pressure signal in diesel thick-wall pipeline,elevate the fault characteristic of compressing ring sticking.Therefore the shielding noise measures based on the wavelet can be used in the signal analysis and processing widely.