基于网络虚拟仪器的特征信号小波分析提取
Extract Specific Signal Using Wavelet Analysis Based on Network Virtual Instrument
作者：陈爽(四川大学 制造科学与工程学院，四川 成都 610065)；袁中凡(四川大学 制造科学与工程学院，四川 成都 610065)；刘祖萍(四川职业技术学院 ，四川 遂宁 629000)
Author：(School of Manufacturing Sci.and Eng., Sichuan Univ., Chengdu 610065,China)；(School of Manufacturing Sci.and Eng., Sichuan Univ., Chengdu 610065,China)；(Sichuan Vocational and Technical College, Suining 629000,China)
收稿日期：2005-10-20 年卷（期）页码：2006,38(4):150-155
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：网络虚拟仪器；MATLAB；Labwindows/CVI；特征信号；小波分析
Key words：network virtual instrument；MATLAB；Labwindows/CVI；specific signal； Wavelet analysis
基金项目：国家科技部创新基金（02c26225120242）
中文摘要
为了准确获取经由Internet传输的远程测试信号，必须对服务器端接收的包含噪声的混和信号进行消噪及特征信号的提取。采用虚拟仪器编程语言Labwindows/CVI与MATLAB的接口，在Labwindows/CVI编译的服务器端应用程序中调用MATLAB的程序，利用Labwindows/CVI编程的灵活性和MATLAB的强大的数学工具包能够实现信号的传输消噪以及特征信号的提取。本文使用软阀值对信号进行一维小波包分解和重构并加以小波变换的方法对混和信号进行了消噪并提取出了原特征信号，同时利用MATLAB的函数对服务器接收的混和信号进行了频谱分析，结果证明了方法的可行性。
英文摘要
In order to obtain the original signal contained by noise and transmitted through Internet. A method is introduced which uses the interface between MATLAB and Labwindows/CVI (Virtual instrument programming language ), transferes the program of MATLAB in the server application which is compiled by Labwindows/CVI. The flexible programming ability belong to Virtual instrument programming language and the abundant mathematic tools of MATLAB are well used. Specific signal was extracted from mixed signal by means of one dimensional wavelet packet decomposition and reconstruction with soft threshold and wavelet transform,and the functions of MATLAB was used to analyze the mixed signal frequency spectrum received by Server. Results indicated that this method was feasible.
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