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Title:

Signal Processing of Air-Coupled Impact-Echo Using Guided Wave Analysis

Accession Number:

01663914

Record Type:

Component

Abstract:

This study aimed at developing a signal processing scheme to accurately predict the thickness of concrete slab using air-coupled impact-echo. The air-coupled impact-echo (IE) has been applied to concrete non-destructive tests (NDT); however, the thickness mode frequency is often difficult to be obtained due to noise components. Furthermore, apparent velocity in concrete is usually unknown parameter in the field and the thickness of the concrete slab cannot be accurately measured. The signal processing scheme using guided wave analysis is proposed in this study, where dispersion curves are drawn in both frequency-wave number (f-k) and phase velocity-frequency (Vcp-f) domains. The theoretical and experimental results demonstrate that the thickness mode frequency and apparent velocity in concrete are clearly obtained from f-k and Vcp-f domains. The proposed method has a great potential to the application of air-coupled IE in the field.

Supplemental Notes:

This paper was sponsored by TRB committee AFF40 Standing Committee on Testing and Evaluation of Transportation Structures. Alternate title: Signal Processing of Air-Coupled Impact Echo Using Guided Wave Analysis

Report/Paper Numbers:

18-04153

Language:

English

Authors:

Choi, Hajin
Azari, Hoda

Pagination:

5p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-04153

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 11:01AM