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工程设计学报  2009, Vol. 16 Issue (3): 227-229    
机电一体化和智能化系统设计理论、方法与技术     
基于提升小波变换的超声信号消噪技术
 沈晓安
浙江工业大学 浙西分校,浙江 衢州 324000
Denoising techniques for ultrasonic signals based on lifting wavelet transform
 SHEN  Xiao-An
West Branch of Zhejiang University of Technology, Quzhou 324000, China
 全文: PDF(400 KB)   HTML
摘要: 为了提高超声无损检测(UNDT)和无损评价(UNDE)中基础数据的信噪比(SNR),提出了一种基于提升小波变换多分辨率分析的超声信号消噪新技术.在分析传统裂谱分析(SSP)方法原理及其局限性的基础上,通过采用提升小波变换多分辨率分析能力将原始超声回波信号进行子带分解,然后按照一定的信噪分离规则来消除噪声,达到提高信噪比的目的.实验结果表明,与传统裂谱分析方法相比,该方法增强了消噪性能的稳定性,提高了超声回波信号的信噪比.
关键词: 超声无损检测信噪比裂谱分析提升小波变换    
Abstract: In order to enhance the signal to noise ratio (SNR) of fundamental ultrasonic echo signal for ultrasonic nondestructive testing (UNDT) and ultrasonic nondestructive evaluation (UNDE), a new denoising technique for ultrasonic signal based on lifting wavelet transform multi-resolution analysis was presented. On the basis of the analysis of shortcomings and principle of classical split spectrum (SSP) algorithm, original ultrasonic echo signals were decomposed into sub-bands through the proposed technique and then the noise was eliminated according to some signal and noise separating rule, which realized the aim of enhancing SNR. The experiment results indicate that the presented technique has high stability in denoising and increases the SNR of ultrasonic target echo signals.
Key words: UNDT    SNR    split spectrum processing    lifting wavelet transform
出版日期: 2009-06-28
基金资助:

国家高技术研究发展计划(863计划)资助项目(2006AA04Z329)

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引用本文:

沈晓安. 基于提升小波变换的超声信号消噪技术[J]. 工程设计学报, 2009, 16(3): 227-229.

SHEN Xiao-An. Denoising techniques for ultrasonic signals based on lifting wavelet transform[J]. Chinese Journal of Engineering Design, 2009, 16(3): 227-229.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/        https://www.zjujournals.com/gcsjxb/CN/Y2009/V16/I3/227

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