Coastal acoustic tomography system and its field application

被引:62
作者
Yamoaka, H
Kaneko, A [1 ]
Park, JH
Zheng, H
Gohda, N
Takano, T
Zhu, XH
Takasugi, Y
机构
[1] Hiroshima Univ, Grad Sch Engn, Hiroshima 7398527, Japan
[2] Asia Air Survey Co Ltd, AAS Inst, Kanagawa 2430016, Japan
[3] Japan Marine Sci & Technol Ctr, Kanagawa 2370061, Japan
[4] Chugoku Natl Ind Res Inst, Hiroshima 7370197, Japan
关键词
coastal acoustic tomography; current-field measurement; inverse analysis; strong tidal current;
D O I
10.1109/JOE.2002.1002483
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The coastal acoustic tomography system (CATS), composed of five moored acoustic stations, has been constructed to measure current fields. The system is developed with special considerations in mind, including the use of Global Positioning System clock signals in the synchronization of the system clock timing among the multiple acoustic stations, and the use of the differently coded Gold sequences to identify the acoustic signals corresponding to individual stations from a received signal. The CATS was successfully applied to map the structure of strongly nonlinear tidal currents in the coastal sea. In spite of the limited spatial resolution caused by inadequate sound transmission data, the two-dimensional tidal vortices features of growth, translation, and decay processes are reconstructed through an inverse analysis of the acoustic travel time obtained among the station pairs. It is evident that the CATS is a powerful tool for measuring variable current fields generated in the coastal seas.
引用
收藏
页码:283 / 295
页数:13
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