微型机与应用2012，Vol.31Issue(5)：75-78,83,5.
基于LabVIEW的超声探伤信号多小波去噪分析与应用
Analysis of multiwavelets de-noising instrument based on LabVIEW and its application in ultrasonic detection signal
郭前岗 1索会迎 1周西峰1
作者信息
- 1. 南京邮电大学自动化学院,江苏南京210046
- 折叠
摘要
Abstract
An improved soft-threshold function has been proposed to overcome the discontinuous shortcoming of the hardthreshold function and the invariable dispersion of soft-threshold function according to the denoising principle of ultrasonic detection signal by multi-wavelet. Because of the short comings of multi-wavelet algorithm in LabVIEW and powerful numerical capability of MATLAB, utilizing hybrid program by LabVIEW and MATLAB, a virtual de-noising instrument has been designed to realize the denoising of ultrasonic detection signal. Meanwhile, it can display the waveforms, save denoising data and the analysis of spectrum. The experiment result shows, by contrasting the denoising effect of wavelets and multi-wavelets, a better effect can be obtained by multi-wavelets. Compared with soft-threshold and hard-threshold; the improved soft-threshold function can improve SNR at a higher level and can also fetch flaw information more effectively.关键词
超声探伤信号/多小波/阈值去噪/LabVIEW/MATLAB/ScriptKey words
ultrasonic detection signal/muhi-wavelet/de-noising/LabVIEW/MATLAB Script分类
信息技术与安全科学引用本文复制引用
郭前岗,索会迎,周西峰..基于LabVIEW的超声探伤信号多小波去噪分析与应用[J].微型机与应用,2012,31(5):75-78,83,5.
