• Journal of Ocean Engineering and Technology
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• v.33 no.5
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• pp.486-494
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• 2019

Recently, the interest in marine leisure activities has been growing rapidly with the work-life balance trend. In response to this demand, the Korean government is supporting fostering and revitalizing the relevant industries and facilities. In particular, a marina has been making efforts to change itself into a resort with multiple amenities instead of a simple mooring facility. However, the facilities in a marina for the transport of marine leisure equipment mostly consist of cranes and boat-lifts using ropes, which can result in incidents such as damage and accidents during lifting or movement. This paper proposes the equipment and support system for the safe transportation of marine leisure ships. Aluminum transport equipment was designed by performing a structural analysis to achieve a lighter weight than the existing steel products. In addition, a safety support system with alarms for tilting or obstacles and a slope monitoring system was developed to enhance the safety during operation and transportation. The safety support system developed in this study was implemented and installed in the transport system, and verified through commissioning on land.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.207-208
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• 2022

Recently, with the development of digital technology, new research cases which applied new technology were increased. Also, the related equipment and services are being developed in the industry. Before new equipment is developed and released, it must go through a verification process. In the maritime industry, equipment is verified through simulation tests or environmental tests on land. However, if only the test on land is conducted, verification data in the actual operating environment might be insufficient. In this paper, considerations are described in the development of an onboard demonstration scenario for verification in the operating environment.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.202-204
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• 2023

제 4차 산업혁명의 도래로 해양 분야에서도 해양산업혁명의 대표 분야인 자율운항선박에 대한 연구개발이 활발히 진행 중이다. 자율운항선박의 원활한 운용을 위해서는 정확한 위치, 항법, 시각 정보가 필수적이다. 현재 해양에서 사용되는 대표적인 항법시스템은 GPS(Global Positioning System)이지만 전파교란, 해킹 등의 취약성이 존재한다. 현재 GPS의 취약점을 보완하기 위한 다양한 항법시스템이 연구되고 있으며, 그 중 다양한 지상파 신호를 동시에 활용하는 지상파 통합항법시스템 R-MODE(Ranging mode)가 있다. 본 논문은 지상파 통합항법시스템 R-Mode 기술 중 지상파 VDES 신호를 활용한 VDES R-Mode에 대한 연구현황 및 향후 계획에 대해 기술하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.257-259
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• 2022

보조수단으로 운용중인 폐쇠회로는 고정된 위치에서 선박들의 이동경로가 파악 가능하여 입출항 관리 시스템 개발에 있어서 중요한 역할을 한다. 이 연구에서는 가우시안 혼합모델을 이용하여 물표를 탐지하고 이동벡터의 계산을 분석하여 매트랩에 적용 가능한 알고리즘을 진행하고자한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.122-124
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• 2012

선박운항 시뮬레이터 시스템은 체험자가 실제 선박을 운항하는 것과 유사한 경험을 할 수 있도록 설계된 시스템으로 선원의 교육 및 해상교통 안전진단 등에 활용된다. 이러한 활용 목적에 따른 효과를 극대화하기 위해 시뮬레이션 통제 및 운용 공간을 비롯해 하드웨어 및 소프트웨어, 데이터베이스 등 여러 요소가 유기적으로 연동되어 구성되는데, 공간 및 하드웨어. G.UI 기반의 소프트웨어 등은 실선박과 거의 흡사하게 제작되고 있는 반면 3차원 영상 소프트웨어 및 데이터베이스는 몰입감을 형성하는 가장 중요한 요소임에도 불구하고 사실적으로 묘사되지 못하고 있다. 특히 선박운항 시뮬레이터의 가장 중요한 요소 중 하나인 해양파 묘사에 있어서는 더욱 취약한 모습을 보여주고 있다. 본 발표를 통해 선박운항 시뮬레이터를 위한 여러 해양파 가시화 요소들을 분석해 보고 몰입감 있는 해양파 가시화를 위한 방안을 모색하고자 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.05a
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• pp.732-736
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• 2001

DGPS는 미 군사용 신호를 이용한 정밀도 수준을 제공할 수 있는 위성항법 시스템으로써 30여개 국가에서 해양용 국가망 위주로 구축되고 있다. 특히 미국은 해양용 DGPS 국가망을 내륙으로 확장한 NDGPS(Nationwide DGPS)체계 구축을 2002년까지 완성할 예정이다. 우리나라도 해양용 국가망을 운영하여 해양활동을 하는 사용자에게 3차원 고정밀 위치정보를 제공하고 있다. 근래에 우리나라 연안에 구축되어 사용중인 해양용 라디오비이콘형 DGPS망을 육상으로 연계한 서비스범위 확대방안이 논의되고 있다. 본 연구는 NDGPS에 대한 기초연구로서 운용중인 DGPS 기준국신호를 모델로 하여 해상 전파 설계치 대비 거리 및 지형변화에 따른 전계강도 변화를 분석하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.1
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• pp.53-59
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• 2021

The marine transport industry generally applies new technologies later than other transport industries, such as airways and railways. Vessels require efficient operation, and their performance and lifespan depend on the level of maintenance and management. Many studies have shown that corrective maintenance (CM) and time-based maintenance (TBM) have restrictions with respect to enabling efficient maintenance of workload and cost to improve operational efficiency. Predictive maintenance (PdM) is an advanced technology that allows monitoring the condition and performance of a target machine to predict its time of failure and helps maintain the key machinery in optimal working conditions at all times. This study presents the development of a marine predictive maintenance (MPdM; maritime predictive maintenance) method based on applying PdM to the marine environment. The MPdM scheme is designed by considering the special environment of the marine transport industry and the extreme marine conditions. Further, results of the study elaborates upon the concept of MPdM and its necessity to advancing marine transportation in the future.

• Journal of Navigation and Port Research
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• v.48 no.4
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• pp.335-341
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• 2024

Recently, research, development, and commercialization of maritime autonomous surface ships (MASS) and remote control are in progress. Remote control is intended to secure autonomous navigation environments for existing ships or early-stage MASS using a remote control system (RCS). The main function of an RCS is to control MASS using data transmission between the MASS and the remote control centre. Remote control by a remote control officer also has an important function. The purpose of this study was to develop RCS and a performance evaluation technique for operation data provided by the RCS. The experiment was conducted during the navigation period of a training ship 'Hannara' after building experimental equipment at both an onshore remote control center and a training ship. As a result of evaluating data transmitted and received using the developed RCS, it was confirmed that data transmission was possible within an error range of 0.1%p. Fourteen types of ship information reflecting the navigation environment of the training ship were confirmed to be transmitted and received. The RCS developed in this work complies with the three principles of remote control: safety, reliability, and availability. This study provides a core technology for the development of RCSs for MASS and the evaluation of data transmission performance.

• Journal of Satellite, Information and Communications
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• v.1 no.2
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• pp.16-24
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• 2006

As a multi-mission GEO satellite, COMS system is being developed jointly by KARI, ETRI, KORDI, KMA, and industries from both abroad and domestic. EADS ASRTIUM is the prime contractor for manufacturing the COMS. ETRI is developing the COMS Ka-band payload and SGCS with the fund from MIC. COMS Satellite Ground Control System (SGCS) will be the only system for monitor and control of the satellite in orbit. In order to fulfill the mission operations of the three payloads and spacecraft bus, COMS SGCS performs telemetry reception and processing, satellite tracking and ranging, command generation and transmission, satellite mission planning, flight dynamics operations, and satellite simulation, By the proper functional allocations, COMS SGCS is divided into five subsystems such as TTC, ROS, MPS, FDS, and CSS. In this paper, functional design of the COMS SGCS is described as five subsystems and the interfaces among the subsystems.

• Journal of Advanced Navigation Technology
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• v.22 no.6
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• pp.545-550
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• 2018

Ministry of Oceans and Fisheries declared action plan for the electric fishing gear using real name in order to prevent overusing the fishing gear and to reduce discarded fishing gear. It is needed for a technique that can efficiently transmit the information including the type and location of the fishing gear and the user's real name to the fishing boat and the control center using IoT-based communication. The marine tracker buoy system, which is placed on the water for a long time, transmit the position data and the state data of the buoys to the control center in the ground by using NB-IoT channels. In this paper, we propose the algorithm for the low-power operation of the marine tracker buoy system is proposed and test results of current consumption in the marine tracker buoy system with the proposed algorithm is investigated.