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.
| Original language | English |
|---|---|
| Pages (from-to) | 570-579 |
| Number of pages | 10 |
| Journal | Mechanical Systems and Signal Processing |
| Volume | 111 |
| DOIs | |
| Publication status | Published - 2018 Oct 1 |
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Keywords
- Acoustic excitation
- Damage detection
- Health monitoring
- Laser-induced plasma
- Wavelet transform
ASJC Scopus subject areas
- Control and Systems Engineering
- Signal Processing
- Civil and Structural Engineering
- Aerospace Engineering
- Mechanical Engineering
- Computer Science Applications
Cite this
Damage detection in pipes based on acoustic excitations using laser-induced plasma. / Kajiwara, Itsuro; Akita, Ryosuke; Hosoya, Naoki.
In: Mechanical Systems and Signal Processing, Vol. 111, 01.10.2018, p. 570-579.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Damage detection in pipes based on acoustic excitations using laser-induced plasma
AU - Kajiwara, Itsuro
AU - Akita, Ryosuke
AU - Hosoya, Naoki
PY - 2018/10/1
Y1 - 2018/10/1
N2 - 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.
AB - 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.
KW - Acoustic excitation
KW - Damage detection
KW - Health monitoring
KW - Laser-induced plasma
KW - Wavelet transform
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UR - http://www.scopus.com/inward/citedby.url?scp=85045699357&partnerID=8YFLogxK
U2 - 10.1016/j.ymssp.2018.04.004
DO - 10.1016/j.ymssp.2018.04.004
M3 - Article
VL - 111
SP - 570
EP - 579
JO - Mechanical Systems and Signal Processing
JF - Mechanical Systems and Signal Processing
SN - 0888-3270
ER -