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中国电机工程学报 2008, 28(14) 38-43 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 热能工程 |
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小波分析在声学法炉内空气动力场测量中的应用 |
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李言钦 胡尚锋 王保东 魏新利 |
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郑州大学节能技术研究中心 郑州航天电子技术有限公司 郑州大学节能技术研究中心 郑州大学节能技术研究中心 |
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摘要：
声学法测量是炉内动力场检测的先进方法，但是，由于炉内复杂的环境噪声及声波传播时的衰减，声波信号的可靠辨识以获得准确的传播时间成为该方法的关键之一。基于小波技术在包括信号处理等许多方面所具有的巨大优越性，研究了小波分析应用于声学法测量的方法。将静态场中的声波信号加上不同随机噪声并进行滤波分析，证明小波法的结果明显优于传统滤波方法。在此基础上，结合声学法测量中具体声波信号的特点，给出了小波及小波包分析在声波信号消噪处理中的应用方法及其在炉膛模型动力场声学法测量实验中的应用结果。 |
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关键词：
炉膛
测量
小波分析
声学法
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Wavelet Analysis Application on Aerodynamic Field Measurement in Furnace by Acoustic Method |
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LI Yan-qin HU Shang-feng WANG Bao-dong WEI Xin-li |
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Abstract:
Acoustic method is an advanced technique for the aerodynamic field measurement in furnace. However, for the complicated background noise and the attenuation of acoustic signals in propagation, reliable identification of the signals received is a key to achieve the accurate flight time data. Wavelet analysis possesses a giant advantage in many fields including signal processing. This paper showed that by adding different random noise to the acoustic signals transmitting in a static field, and then comparing the filtering effects by different methods, the wavelet analysis proves to be more effective than the traditional method. The wavelet analysis was used to process the acoustic signals from the aerodynamic field measurement in a furnace model, with satisfactory measuring results presented. And as well, the principle of using wavelet and wavelet packet to analyze the acoustic signals in the measurement was introduced. |
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Keywords:
furnace
measurement
wavelet analysis
acoustic method
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收稿日期 2007-08-20 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 李言钦 |
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作者简介: |
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作者Email: liyq@zzu.edu.cn;goon--@hotmail.com;lyq_hy@263.sina.com |
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| 参考文献： |
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