Development of high precision time synchronization method by using underwater acoustic communication for long term observation

• Project/Area Number: 25630403
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: KONDO Hayato 東京海洋大学, その他部局等, 准教授 (40361802)
• Research Collaborator: OZAKI Shunji 株式会社SGK, システム技研, 取締役
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: ソーナー / 水中音響通信 / 時刻同期 / FPGA / DSP

Outline of Final Research Achievements

The goal of this study is to develop high precision time synchronization method between distributed underwater observation systems using acoustic communication technology.
We have developed a method that a drifted clock synchronizes to a reference clock while two acoustic communication devices are communicating each other. A test system was developed and the feasibility of the proposed method has been proved by tank tests.