基于Matlab的混凝土声发射信号小波阈值去噪效果研究

摘要

在对混凝土类材料进行损伤声发射检测过程中，仪器收集的信号通常包含噪声信号，影响声发射分析的精度。本文基于Matlab小波分析，阐述一些主要的阈值选取方案，对不同阈值选择方案的去噪效果进行分析、评价、对比与总结，找出较为有效的混凝土声发射信号阈值去噪策略，有利于促进混凝土声发射信号的研究。%During acoustic emission testing of carrying on concrete materials,the instrument signals collected typically includes noise,affecting the accuracy of acoustic emission analysis.Based on Matlab wavelet analysis to explain some of the major threshold selection scheme options for different threshold denoising effect analy-sis,evaluation,comparison and summary to identify more effective concrete acoustic emission signals thresh-olding strategy,and promoting concrete research on acoustic emission signals.