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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. |
| Rights: | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/70913 |
| 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)
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Submitter: 梶原 逸朗
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