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

• Kajiwara, Itsuro

• Akita, Ryosuke

• Hosoya, Naoki

抄録

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.

収録刊行物

• Mechanical systems and signal processing

  Mechanical systems and signal processing 111 570-579, 2018-10

  Elsevier

キーワード

• Laser-induced plasma
• Acoustic excitation
• Health monitoring
• Damage detection
• Wavelet transform

詳細情報

• CRID: 1050282814003349248
• NII論文ID: 120006486805
• DOI: 10.1016/j.ymssp.2018.04.004
• HANDLE: 2115/70913
• ISSN: 08883270
• Web Site: https://api.elsevier.com/content/article/PII:S088832701830195X?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S088832701830195X?httpAccept=text/plain
• 本文言語コード: en
• 資料種別: journal article
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