2022 Fiscal Year Final Research Report
Search for victims in rubble using rotating magnetic and acoustic dipoles
Project/Area Number |
20K21051
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 25:Social systems engineering, safety engineering, disaster prevention engineering, and related fields
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Research Institution | The University of Tokyo |
Principal Investigator |
Nara Takaaki 東京大学, 大学院情報理工学系研究科, 教授 (80353423)
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Co-Investigator(Kenkyū-buntansha) |
長谷川 圭介 東京大学, 大学院情報理工学系研究科, 講師 (20733108)
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Project Period (FY) |
2020-07-30 – 2023-03-31
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Keywords | 逆問題 / 音源定位 / 磁場源定位 / 要救助者探索 |
Outline of Final Research Achievements |
In urban earthquakes, searching for survivors buried in rubble is inevitable. This research proposed a method using smartphones of the survivors for their search. A rescuer uses a rotating dipole magnetic source and dipole sound sources to generate the magnetic and sound fields in the exploration space that can be used for localization. Then, the smartphones of the buried people detect those fields, calculate their directions viewing from the rescuer, and convey the direction information by communication. The experiments conducted in Fire Academy of Chiba prefecture showed that the rescuer was able to approach a smartphone in the range of about 20 m even when it was surrounded by rubble.
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Free Research Field |
逆問題
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Academic Significance and Societal Importance of the Research Achievements |
地震災害時における要救助者の位置推定は,迅速な救助のための必須要件である.従来法として,音響探査,電磁波探査法などがある.これらは要救助者自身を探索する直接的手法と言えるが,要救助者が声を出せないと推定できない,金属製瓦礫に囲まれると推定精度が悪化するという問題があった.これに対し提案手法は,埋没者がスマートフォンをもっていなければならないという制約があるが,従来法で困難な状況でも探索が可能になるというメリットがある.これらを相補的に用いることで,迅速な瓦礫埋没者が実現できるようになるというのが本研究の学術的・社会的意義である.
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