摘要
介绍了基于小波变换的激光超声检测信号降噪处理技术,实际检测信号的降噪处理试验表明,应用该技术对激光超声检测信号进行降噪处理可显著提高信噪比。根据信号的波形特点选取了小波函数,采用heursure阈值去噪有利于提取超声回波波形。
This article introduced a technology of laser ultrasonic testing signal denoise processing based on wavelet transformation.A practical case study shows that applying it to laser ultrasonic testing signal for denoise processing can greatly raise the signalnoise ratio.The wavelet function was selected by the signal s wave characters.The denoise by heursure threshold is of benefic to extraction of the wave of altrasonic echo.
出处
《实验室研究与探索》
CAS
北大核心
2009年第1期39-41,共3页
Research and Exploration In Laboratory
基金
黑龙江省教育厅2008年度科学技术研究项目(11531331)
关键词
小波变换
去噪
无损检测
信号
超声
wavelet transformation
denoise
nondestruction detection
signal
ultrasonic
