Development of Detection Technology for Underwater Sound from Ships by Finite-difference time-domain method

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420832
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Imasato Motonobu 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (80443240)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 海上監視 / 船舶海洋工学 / 水中音響 / リモートセンシング

Outline of Final Research Achievements

As part of development of system for surveillance ships navigating at ocean or coastlines nearby the important power plants and facilities, I have developed methods of detecting or discrimination to approaching ships by underwater sounds. To detect approaching ships early, I introduced the spectrum analysis by First Fourier Transform (FFT) and linear prediction method. As a result, there was able to detect frequency characteristics early, more easily. And I have developed the algorithmic program using the finite-difference time-domain (FDTD) method, introduced the examination of this method. I expect that this surveillance system will be useful in predicting the presence of dangerous ships or poaching boats by sensing underwater sound.

Free Research Field

船舶海洋工学