• 한국전자통신학회논문지
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• 제5권1호
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• pp.51-57
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• 2010

본 논문은 일반적인 기상관측 부이시스템에서의 전자시스템설계에 관한 것이다. 주로 기지국, 데이터처리, 파워시스템설계 등의 기상관축 부이용 전자통신시스템 설계에 관한 것이다. 연구결과 시스템 설계가 기지국에서 부이를 통하여 배터리 사용시간을 확인하였고, 추가적인 파워의 소비 없이 자체적으로 부이에서의 작용함을 알 수 있다.

• Journal of information and communication convergence engineering
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• 제8권3호
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• pp.301-306
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• 2010

This project is to study and design a meteorological buoy. It mainly covers and compares two approaches to design a meteorological buoy where their functions are same. The comparison will be made between mechanical structure, type of sensors, and electronics system design and power consumption issues.

• 한국해양공학회지
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• 제11권4호
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• pp.205-212
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• 1997

The major subject of this paper is the conceptual design of a cable-buoy system based on mechanics of floating bodies and mooring lines. The goal is to present a systematic relevant analysis procedure for the conceptual design of oceanographic buoy systems. The dynamics of a free floating body with an anchoring line is studied and a model is proposed through the primary engineering.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.35-39
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• 2010

This research is part of the development of buoy system specially designed for meteorology and oceanographic purposes. The control system design and the brief operation of the buoy will be discussed in this paper.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.171-171
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• 2010

An innovative design of a floating-buoy wave energy converter (WEC) using hydrostatic transmission (HST), named HSTWEC, is presented in this paper. The system is designed to convert ocean wave fluctuation into electricity by using the HST circuit and an electric generator. Based on the floating-buoy concept, the wave forces the sub-buoy to move up and down. Consequently, the electric power can be obtained from the generator in both the moving directions of the sub-buoy through the HST circuit as shown in Fig. 1. In order to investigate the HSTWEC operations, a mathematical model of the system is indispensible. In addition, the method to control the HSTWEC, including: pump displacement control, tension adjustment control and ballast weight control, is also discussed in this paper. Finally, the design concept as well as simulation results indicated that this HSTWEC design is an effective solution and possible to fabricate for wave energy generation.

• 한국전자통신학회논문지
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• 제6권1호
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• pp.123-128
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• 2011

소형스케일용 해양부이를 위한 hull설계부분을 소개한다. hull구조설계와 부이의 모든 부분을 연결하는 설계부분에 대하여 연구하였으며, 주로 부이의 hull설계내용을 순차적으로 소개한다. 전체적인 강도와 충돌저항력을 향상시키는 방법으로 부이를 지지하는 2층 및 반지름방향의 주요구조와 함께 내벽을 이용하여 설계를 수행하였다.

• 한국CDE학회논문집
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• 제16권3호
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• pp.227-235
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• 2011

Ship handling simulator should have capabilities of calculating ship motions (heave, pitch, and roll) at given sea state and displaying the calculated motions through a real-time 3D visualization system. Motion solver of a ship handling simulator generally calculates those motions in addition to position for an own ship, a main simulation target, but provides only position information for traffic ships. Therefore, it is required to simulate real-time traffic ship and buoy motions coupled with ocean waves in a ship handling simulator for the realistic visualization. In the paper, the authors propose a simple dynamics model by which ship and buoy motions are calculated with the input data of wave height and discuss a method for the implementation of a ship and buoy motions calculation module.

• 한국위성정보통신학회논문지
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• 제11권2호
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• pp.8-13
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• 2016

부표는 항구나 해양의 위험물을 표시하기 위하여 체인에 의해 묶여진 부양물체이며, 크게 이동형과 고정형 부표로 나눌 수 있다. 해양 생태환경의 관찰과 연안지역 주변을 관찰 요구를 충족하기 위하여 스마트 부표들이 개발되었다. 스마트 부표들은 GPS, CDMA, ZigBee과 같은 무선 네트워크 시스템을 가진다. GPS 기술을 사용하면 부표의 위치나 주변 환경에 대한 추적이나 관찰을 할 수 있다. 그러나 고정 부표에 사용되는 GPS 시스템은 비싼 비용과 많은 양의 전력을 소모한다. 많은 부표들은 ZigBee를 사용하여 전력소비를 급격하게 줄인다. 본 논문에서는 적은 데이터 전송과 적은 전력소모를 가진 추적가능 부표 시스템을 소개한다. 제안하는 프로토콜은 시스템의 변경없이 비정상적인 움직임을 찾고 추적 가능한 정보 모을 수 있는 장점을 가진다. 2개의 추가적인 비트와 가입요청 메시지들이 추적 가능한 부표시스템에 사용된다. 제안하는 프로토콜은 페트리넷으로 모델링하였고 도달 가능성을 증명한다.

• 한국해양공학회지
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• 제23권1호
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• pp.81-88
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• 2009

An evaluation of the structural integrity of an oceanographic buoy subjected to extreme loads was carried out in this study. Load components, such as the current, waves, and wind load, which were required for the sea's environmental conditions, were calculated precisely. A non linear finite element analysis was conducted to elucidate the structural response of the buoy under extreme environmental conditions. Based on the surface drift velocity scheme, a dynamic impact analysis was also carried out for the case of collision accidents. The proposed numerical technique would be a useful and cost effective tool for design scheme evaluation in the field of oceanographic buoys.

• International Journal of Naval Architecture and Ocean Engineering
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• 제7권4호
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• pp.739-749
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• 2015

A new conceptual dual-buoy Wave Energy Converter (WEC) for the enhancement of energy extraction efficiency is suggested. Based on actual wave data, the design process for the suggested WEC is conducted in such a way as to ensure that it is suitable in real sea. Actual wave data measured in Korea's East Sea (position: $36.404N^{\circ}$ and $129.274E^{\circ}$) from May 1, 2002 to March 29, 2005 were used as the input wave spectrum for the performance estimation of the dual-buoy WEC. The suggested WEC, a point absorber type, consists of two concentric floating circular cylinders (an inner and a hollow outer buoy). Multiple resonant frequencies in proposed WEC affect the Power Ttake-off (PTO) performance of the WEC. Based on the numerical results, several design strategies are proposed to further enhance the extraction efficiency, including intentional mismatching among the heave natural frequencies of dual buoys, the natural frequency of the internal fluid, and the peak frequency of the input wave spectrum.