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Damage detection in pipes based on acoustic excitations using laser-induced plasma

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Title: Damage detection in pipes based on acoustic excitations using laser-induced plasma
Authors: Kajiwara, Itsuro Browse this author →KAKEN DB
Akita, Ryosuke Browse this author
Hosoya, Naoki Browse this author
Keywords: Laser-induced plasma
Acoustic excitation
Health monitoring
Damage detection
Wavelet transform
Issue Date: Oct-2018
Publisher: Elsevier
Journal Title: Mechanical systems and signal processing
Volume: 111
Start Page: 570
End Page: 579
Publisher DOI: 10.1016/j.ymssp.2018.04.004
Abstract: A health-monitoring system is proposed to detect holes drilled in a pipe based on laser plasma acoustic excitations and acoustic measurements. In this system, an acoustic excitation is applied to a pipe via a laser-induced plasma in air generated by a high-power Nd:YAG pulse laser. Laser-induced plasmas can realize non-contact acoustic impulse excitations. A microphone is used to measure the time response of the acoustic pressure. In this study, we focus on the detection of a hole in the pipe. The reflection of the acoustic wave due to a hole drilled in the pipe induces a change in the time response of the acoustic pressure. Applying a continuous wavelet transform to the measured time response data with/ without the hole can locate the position of the hole. This study demonstrates the effectiveness of the present damage detection method based on an acoustic excitation using a laser-induced plasma.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 梶原 逸朗

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