Automatic Impact-sounding Acoustic Inspection of Concrete Structure

Impact sounding signal has been shown to contain information about structural integrity flaws and subsurface objects from previous research. As non-destructive testing (NDT) method, one of the biggest challenges in impact sounding based inspection is the subsurface targets detection and reconstructi...

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Bibliographic Details
Published in:arXiv.org 2021-10
Main Authors: Feng, Jinglun, Xiao, Hua, Hoxha, Ejup, Song, Yifeng, Yang, Liang, Xiao, Jizhong
Format: Article
Language:English
Subjects:
Acoustic mapping
Acoustics
Concrete structures
Fast Fourier transformations
Flaw detection
Fourier transforms
Frequency analysis
Inspection
Nondestructive testing
Solenoids
Sounding
Structural integrity
Target detection
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Summary:Impact sounding signal has been shown to contain information about structural integrity flaws and subsurface objects from previous research. As non-destructive testing (NDT) method, one of the biggest challenges in impact sounding based inspection is the subsurface targets detection and reconstruction. This paper presents the importance and practicability of using solenoids to trigger impact sounding signal and using acoustic data to reconstruct subsurface objects to address this issue. First, by taking advantage of Visual Simultaneous Localization and Mapping (V-SLAM), we could obtain the 3D position of the robot during the inspection. Second, our NDE method is based on Frequency Density (FD) analysis for the Fast Fourier Transform (FFT) of the impact sounding signal. At last, by combining the 3D position data and acoustic data, this paper creates a 3D map to highlight the possible subsurface objects. The experimental results demonstrate the feasibility of the method.
ISSN:2331-8422