氣液兩相管流流型信號的小波去噪處理

Wavelet Denoising Treatment of Flow Pattern Signals in Liquid-gas Two Phase Flow Pipelines

摘要: 流型信號能夠反映氣液兩相管流的流動特征，它們往往會伴隨著各種隨機噪聲，為此建立了一座氣液兩相流的綜合試驗裝置，提取氣液兩相管流的流型信號．采用小波變換對信號樣本的進行多尺度分解，利用信號和噪聲在不同尺度上的特性把它們區分開來，消除噪聲后再對信號進行重構，得到了較好的去噪效果．

Abstract: Liquid-gas two phase flow can be characterized by its flow pattern signals, which are offen with some random noises. A general two phase flow experimental facility is set up to obtain flow pattern signals in two phase flow pipes. Flowing signals are decomposed with Daubechies wavelets to differ the noises from flow pattern signals. The denoised signals are quite well after reconstruction.