油水两相流电导波动信号小波去噪阈值规则的确定  

Determination of wavelet thresholding denoising rule on conductance fluctuating signal of oil/water two-phase flow

作　　者：张松林[1] 周云龙[2] 

机构地区：[1]东北电力大学自动化工程学院,吉林吉林132012 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《黑龙江电力》2011年第2期116-120,共5页Heilongjiang Electric Power

基　　金：吉林省科技发展计划项目(20040513)

摘　　要：阐述了小波去噪原理、油水两相流实验系统和方法,利用小波分解、滤波、重构对油水两相流电导波动信号进行去噪处理,消除了实验中各种因素产生的噪声。对4种不同阈值规则去噪性能进行了对比,分析了信号功率谱密度,认为采用Heursure规则得到的信号最理想,可以有效去除噪声,并广泛应用于不同流型电导波动信号。This paper introduces the theory of wavelet denoising,the experiment system and method of oil/water two-phase flow.All kinds of noise of the conductance fluctuating signal of oil/water two-phase flow in the test are eliminated by wavelet decomposition,filtering and reconfiguration.By comparing 4 kinds of different thresholding denoising performance and analyzing power spectral density of signal,the signal acquired by JJeursure rule is optimal,which effectively eliminates noise and applies to different types of conductance fluctuating signal.

关 键 词：油水两相流 小波变化 信号去噪 shannon信息熵 功率谱密度 

分 类 号：O359.1[理学—流体力学]