小波阈值去噪在光纤持气率计信号处理中的应用  

Application of wavelet threshold de-noising in signal processing of optical fiber void fraction meter

作　　者：孔令富[1] 孔维航[1] 解娜[2] 李英伟[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]燕山大学图书馆,河北秦皇岛066004

出　　处：《燕山大学学报》2013年第2期159-163,共5页Journal of Yanshan University

基　　金：国家科技重大专项(2011ZX05020-006)

摘　　要：光纤持气率计是一种新型持气率测量仪器。根据光纤持气率计信号和小波变换多分辨率分析的特点,小波阈值方法可有效去除光纤探针信号噪声干扰。本文以能量比、信噪比和气相比为衡量各方法去噪性能指标,对不同阈值方法和阈值准则下进行光纤探针信号去噪处理。并验证了采用启发式SURE阈值(Heursure)去噪的可行性和优越性,对光纤持气率计信号滤波处理具有很好的参考价值。Optical fiber void fraction meter is a novel void fraction measuring instrument.Based on the characteristics of optical fiber void fraction meter signal and wavelet transform multi-resolution analysis,wavelet threshold method can eliminate noise interference effectively from optical fiber probe signal.In this paper,energy ratio,SNR and local void fraction are taken as performance index,and the optical fiber probe signal de-noising is executed by using different threshold methods and criterion.The feasibility and superiority of threshold de-noising using heuristic SURE（Heursure） is proved,which has a good reference value for the signal de-noising procession of optical fiber void fraction meter.

关 键 词：小波阈值 光纤持气率计 光纤探针信号 去噪 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]