Underwater LF wave propagation study for positioning
Underwater LF wave propagation study for positioning
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用于定位的水下低频波传播研究
DOI：
10.1109/oceanse.2017.8084829
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Hiroyasu Sato
中科院分区：
文献类型：
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作者：
H. Yoshida;Ryotaro Suga;Koichi Uesaka;Masaharu Takahashi;N. Ishii;Qiang Chen;Naomichi Fuji;Hiroyasu Sato
1998年，日本海洋科学技术研究所开始了第一个远程巡航自主式潜水器原型的开发项目，以评估在北极冰层覆盖区下航行所需的基本技术。2005年，浦岛LCAUV实现了317公里的连续巡航，由JAMSTEC开发的深海燃料电池提供动力[1]。然后，我们进入下一阶段，并进行了第二个原型LCAUV的设计，目标射程超过3,000公里。包括电源、通讯系统、定位系统的改进。2010年，一个小型的高效多用途（HEML）燃料电池完成了[2]，一个远程声学通信系统使用时间反转波实现了1,000公里的通信。但到2010年，我们还没有开发出实用的冰下定位系统。在过去的几年里，北极冰层的急剧融化将导致极端天气。这是一个非常严重的问题，但人们对它的了解仍然很少。科学家们需要更多的研究来了解它。因此，我们计划开发一个北极研究平台，专门进行冰下观测。目前，我们正在研究一种新的定位方法与通信的可用性之前，开发平台或AUV。所提出的方法是基于低频电磁波，它可以在冰和海水中传播。一个原型来评估的方法是像GPS中继器。设置在冰面上的中继器接收GPS信号，通过冰层向数十米深的海水发射无线电波。为了实现该系统的可行性，我们于2016年开始开发水下天线并测量海冰和海水中的波传播。
In 1998, JAMSTEC started the development project of the first prototype of a long-range cruising AUV (LCAUV) to evaluate fundamental technologies needed to travel through under the ice covered area of the Arctic. In 2005, The LCAUV, Urashima, achieved 317 km continuous cruising powered by a deep sea fuel cell developed in JAMSTEC [1]. We then moved to next stage and have conducted to design the second prototype LCAUV with target range of over 3,000 km. It included improvement of power source, communication system, and positioning system. In 2010 a small high efficiency multi-less (HEML) fuel cell was completed [2] and a long range acoustic communication system achieved 1,000 km communication using time-reversal waves. But we had not developed practical positioning system for under the ice by 2010. In past years the dramatic melting of Arctic ice would be driving extreme weather. This is very serious problem, but it is still poorly understood. Scientists need more research to understand it. We have thus a plan to develop an Arctic research platform that especially performs observations under the ice. Now we are conducting a research of a new positioning method with communication availability before developing the platform or an AUV. The proposed method is based on low frequency electromagnetic waves which can propagate inside of ice and sea water. A prototype to evaluate the method is like GPS repeater. The repeater to be set on the ice receives GPS signal, transmitting radio waves into the sea water via the ice up to several tens meters deep. To realize the system feasibility we started developing underwater antennas and measuring wave propagation in the sea ice and the sea water in 2016.