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  1. 防災科研関係論文

海底熱水活動の音響的観測手法の開発

https://nied-repo.bosai.go.jp/records/5719
https://nied-repo.bosai.go.jp/records/5719
7ffd72ad-fe44-4e06-8416-fa822c6a2d43
Item type researchmap(1)
公開日 2025-04-07
タイトル
言語 ja
タイトル 海底熱水活動の音響的観測手法の開発
タイトル
言語 en
タイトル Proposed Method for Observing Seafloor Hydrothermal Flows Using an Acoustic Video Camera
言語
言語 jpn
著者 望月 将志

× 望月 将志

ja 望月 将志

en MOCHIZUKI Masashi

Search repository
田村 肇

× 田村 肇

ja 田村 肇

en TAMURA Hajimu

Search repository
木下 正高

× 木下 正高

ja 木下 正高

en KINOSHITA Masataka

Search repository
浅田 昭

× 浅田 昭

ja 浅田 昭

en ASADA Akira

Search repository
玉木 賢策

× 玉木 賢策

ja 玉木 賢策

en TAMAKI Kensaku

Search repository
抄録
内容記述タイプ Other
内容記述 "In studies of mass and heat transfers in the ocean, it is very important to determine the seafloor hydrothermal flows in mid-oceanic ridges. However, whole images of such hydrothermal flows and their internal structures are not easily captured or evaluated, and there is no established method for doing so. Here we report our development of a method for observing and delineating seafloor hydrothermal flows with an acoustic method. The proposed observation system consists of an acoustic video camera named ""DIDSON,"" a concentrator lens (1°), and a pan-and-tilt mechanism. DIDSON is an acoustic lens-based sonar that can substitute for an optical system in turbid or dark water where optical systems fail. The pan-and-tilt mechanism rotates the DIDSON with its concentrator lens to scan the hydrothermal flows discharging from the seafloor. We conducted a tank experiment to evaluate the utility of the proposed system for seafloor hydrothermal activity observation. We found that the system was able to delineate the image of an artificial seafloor hydrothermal flow; that is, a heated water flow that was pumped into the experimental tank through a narrow silicon tube. This result indicated that the proposed system will be of practical use."
言語 ja
抄録
内容記述タイプ Other
内容記述 "In studies of mass and heat transfers in the ocean, it is very important to determine the seafloor hydrothermal flows in mid-oceanic ridges. However, whole images of such hydrothermal flows and their internal structures are not easily captured or evaluated, and there is no established method for doing so. Here we report our development of a method for observing and delineating seafloor hydrothermal flows with an acoustic method. The proposed observation system consists of an acoustic video camera named ""DIDSON,"" a concentrator lens (1°), and a pan-and-tilt mechanism. DIDSON is an acoustic lens-based sonar that can substitute for an optical system in turbid or dark water where optical systems fail. The pan-and-tilt mechanism rotates the DIDSON with its concentrator lens to scan the hydrothermal flows discharging from the seafloor. We conducted a tank experiment to evaluate the utility of the proposed system for seafloor hydrothermal activity observation. We found that the system was able to delineate the image of an artificial seafloor hydrothermal flow; that is, a heated water flow that was pumped into the experimental tank through a narrow silicon tube. This result indicated that the proposed system will be of practical use."
言語 en
書誌情報 ja : 海洋音響学会誌
en : The Journal of the Marine Acoustics Society of Japan

巻 40, 号 3, p. 149-156, 発行日 2013
出版者
言語 ja
出版者 特定非営利活動法人 海洋音響学会
出版者
言語 en
出版者 The Marine Acoustics Society of Japan
ISSN
収録物識別子タイプ ISSN
収録物識別子 0916-5835
DOI
関連識別子 10.3135/jmasj.40.149
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