期刊论文

OMHT method for weak signal processing of GPR and its application in identification of concrete micro-crack

Zhang, Liang

英文

中南大学学报(英文版)

2095-2899

2019

26

11

3057-3065

10.1007/s11771-019-4236-y

正交匹配追踪 希尔伯特变换 盾构隧道 衬砌结构 隐伏微裂缝 publisher-imprint-name Central South University, co-published with Springer volume-issue-count 12 issue-article-count 23 issue-toc-levels 0 issue-pricelist-year 2019 issue-copyright-holder Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature issue-copyright-year 2019 article-contains-esm No article-numbering-style Unnumbered article-registration-date-year 2019 article-registration-date-month 12 article-registration-date-day 27 article-toc-levels 0 toc-levels 0 volume-type Regular journal-product ArchiveJournal numbering-style Unnumbered article-grants-type Regular metadata-grant OpenAccess abstract-grant OpenAccess bodypdf-grant Restricted bodyhtml-grant Restricted bibliography-grant Restricted esm-grant OpenAccess online-first false pdf-file-reference BodyRef/PDF/11771_2019_Article_4236.pdf pdf-type Typeset target-type OnlinePDF issue-online-date-year 2020 issue-online-date-month 1 issue-online-date-day 3 issue-type Regular article-type OriginalPaper journal-subject-primary Engineering journal-subject-secondary Engineering, general journal-subject-secondary Metallic Materials journal-subject-collection Engineering open-access false Foundation item: Projects(51678071, 51608183) supported by the National Natural Science Foundation of China; Projects(CX2018B530, CX2018B531) supported by the Postgraduate Research and Innovation-funded Project of Hunan Province, China; Projects(16BCX13, 16BCX09) supported by Changsha University of Science and Technology, China

本校为其他机构

In the light of the problem of weak reflection signals shielded by strong reflections from the concrete surface, the detection and the recognition of hidden micro-cracks in the shield tunnel lining were studied using the orthogonal matching pursuit and the Hilbert transform(OMHT method). First, according to the matching pursuit algorithm and the strong reflection-forming mechanism, and based on the sparse representation theory, a sparse dictionary, adapted to the characteristics of the strong reflection signal, was selected, and a matching deco...

针对混凝土表面强反射等原因造成的异常强反射信号屏蔽下部微弱目的信号的问题,采用正交贪婪匹配追踪与希尔伯特变换相结合的方法(OMHT法)进行了盾构隧道衬砌隐伏微裂缝的检测与识别.首先,依据匹配追踪算法和强反射形成机理,基于稀疏表示理论,选取了与强反射信号特征相适应的稀疏字典,对每道信号进行匹配分解处理,使淹没于强反射中的微弱目标体信号得到较好的展示.其次,对处理后的信号进行希尔伯特变换提取雷达剖面瞬时振幅、瞬时频率和瞬时相位等多个参数信息,从多个角度对地质雷达图像进行综合分析和判断.结果表明,OMHT法可精准弱化强阻抗界面的影响,并有效增强管片隐伏微裂缝弱反射信号能量....