测试技术学报2018，Vol.32Issue(4)：307-311,5.DOI:10.3969/j.issn.1671-7449.2018.04.005
基于EMD的微裂缝超声回波信号去噪算法
Micro-Crack Ultrasonic Echo Signal Denoising Algorithm Based on EMD
摘要
Abstract
In order to improve the sensitivity and reliability of the laser heterodyne interferometry to detect micro-cracks,a discussion on the denoising algorithm using EMD for the demodulated laser ultra-sonic echo signal is presented.The EMD algorithm is applied to the experiment to get the ultrasonic ech-o signal,and the location information of the micro-crack is extracted.The experimental results show that EMD can effectively remove the noise components in the ultrasonic echo signal,and the error rate of the distance between the actual distance and the distance of the micro-crack obtained by the wavelet transform algorithm is increased by 1.02%,which is also helpful for judging the size of the micro-crack.关键词
光外差干涉法/微裂缝/去噪/经验模态分解Key words
light heterodyne interference method/micro-crack/denoising/empirical mode decomposition分类
信息技术与安全科学引用本文复制引用
常晓丽,朱岩,柴艳丽,张鹏..基于EMD的微裂缝超声回波信号去噪算法[J].测试技术学报,2018,32(4):307-311,5.基金项目
航空科学基金资助项目(2016ZD44006) （2016ZD44006）
