Acoustic evaluation of concrete delaminations using ball-chain impact excitation

Hongbin Sun; Jinying Zhu; Suyun Ham

doi:10.1121/1.4983343

Acoustic evaluation of concrete delaminations using ball-chain impact excitation

Hongbin Sun, Jinying Zhu, Suyun Ham

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

This letter presents an automated acoustic sensing device for rapid detection of delamination in concrete. The device consists of ball-chains for continual impact excitation and multi-channel microphones for acoustic sensing. A ball-chain is formed by multiple metal balls connected by flexible ropes and is dragged on concrete surface to excite vibration of delaminations. Compared to the conventional chain drag test, the ball-chain generates acoustic signals with higher signal-to-noise ratio (S/N) because the balls give isolated but continual impacts on concrete surface during dragging. The proposed method was validated on a concrete specimen with artificial delaminations.

Original language	English
Pages (from-to)	EL477-EL481
Journal	Journal of the Acoustical Society of America
Volume	141
Issue number	5
DOIs	https://doi.org/10.1121/1.4983343
State	Published - May 1 2017
Externally published	Yes

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abstract = "This letter presents an automated acoustic sensing device for rapid detection of delamination in concrete. The device consists of ball-chains for continual impact excitation and multi-channel microphones for acoustic sensing. A ball-chain is formed by multiple metal balls connected by flexible ropes and is dragged on concrete surface to excite vibration of delaminations. Compared to the conventional chain drag test, the ball-chain generates acoustic signals with higher signal-to-noise ratio (S/N) because the balls give isolated but continual impacts on concrete surface during dragging. The proposed method was validated on a concrete specimen with artificial delaminations.",

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AB - This letter presents an automated acoustic sensing device for rapid detection of delamination in concrete. The device consists of ball-chains for continual impact excitation and multi-channel microphones for acoustic sensing. A ball-chain is formed by multiple metal balls connected by flexible ropes and is dragged on concrete surface to excite vibration of delaminations. Compared to the conventional chain drag test, the ball-chain generates acoustic signals with higher signal-to-noise ratio (S/N) because the balls give isolated but continual impacts on concrete surface during dragging. The proposed method was validated on a concrete specimen with artificial delaminations.

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Acoustic evaluation of concrete delaminations using ball-chain impact excitation

Abstract

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