计算机工程Issue(2)：282-286,5.DOI:10.3969/j.issn.1000-3428.2015.02.054
基于ISMP的高速公路护栏立柱导波检测
Guided Wave Detection on Expressway Guardrail Post Based on ISMP
摘要
Abstract
For the low signal to noise ratio, unconspicuous echo characteristic signal and other issues encountered in ultrasonic guided waves inspection of highway guardrail posts,an Improved Subspace Matching Pursuit( ISMP) algorithm is presented,which obtains the correlated atomic sets for each iteration from over-complete chirp atom library by the priori information of echo signal and achieves echo signal feature extraction by iterating to get the best time-frequency atom of the signal to be matched. The algorithm is verified by the guided wave inspection signal whose center frequency is 128 kHz. The results show that ISMP can effectively extract the characteristic atoms from echo signal, and the actual measurement error is less than 1% . It can meet the requirements of project detection.关键词
匹配追踪/Chirp原子/超声导波技术/护栏立柱/埋深检测/无损检测Key words
matching pursuit/Chirp atom/ultrasonic guided wave technology/guardrail post/buried depth detection/nondestructive detection分类
数理科学引用本文复制引用
柳伟续,李晓霞,唐志峰,吕福在,申瑞君..基于ISMP的高速公路护栏立柱导波检测[J].计算机工程,2015,(2):282-286,5.基金项目
国家自然科学基金资助项目(61271084,51275454) （61271084,51275454）
浙江省重大科技计划基金资助项目(2012C01015-2) （2012C01015-2）
浙江大学青年教师交叉研究种子基金资助项目(2011022)。 （2011022）
