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《Chinese Journal of Sensors and Actuators》 2007-04
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Research on Extract and Filter of Dynamic Signal of Two-Phase Flow Based on HHT

SUN Bin1,2,ZHANG Hong-jian1 1.Department of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China;2.College of Metrological Technology and Engineering,China Jiliang University,Hangzhou 310018,China  
For wiping off noise component from differential pressure signal of gas-liquid two-phase flow,and extracting differential pressure fluctuation signal,a signal process method of gas-liquid two-phase flow based on HHT(Hilbert-Huang Transform)was put forward.Differential pressure signal of different flow regime were handled by EMD(Empirical Mode Decomposition),marginal spectrum of different mode were analyzed,and noise were eliminated using multi-dimension filter characteristics of HHT.Further,differential pressure fluctuation signal were attained.Experimental results show that this method can get rid of high frequency noise effectively,acquired differential pressure fluctuation signal can commendably keep the partial characteristics of signal.Clear principle and concise physical meanings make it be a fine method to process nonlinear signal.
【Fund】: 国家质量监督检验检疫总局规划项目资助(2006QK23);; 国家高技术研究发展计划专项基金资助(2001AA413210);; 中国计量学院校立项目联合资助(XZ0516)
【CateGory Index】: TN911
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