• Journal of Advanced Marine Engineering and Technology
• /
• v.34 no.8
• /
• pp.1188-1194
• /
• 2010

On shipboard, several kinds of data are generated from many equipments. Although these data are mainly used for the safe navigation of ship, their usability may be enhanced if they are managed on a database. However, because these data have different formats according to the kinds of equipments, an integrated database is required. This paper presents a design and implementation of such database.

• Journal of Institute of Control, Robotics and Systems
• /
• v.14 no.2
• /
• pp.118-124
• /
• 2008

Recently fishing industry is interested in efficiency and automation to acquire the international competitive power of national fishing industry. As an automation device of fishing boat, there are electric compasses using GPS and terrestrial magnetic sensor. Electric compass can be minimum size, high effectiveness with keeping the characteristic of a magnetic compass. This can be used a heading angle sensor to construct auto-navigation system in a small size ship. This paper develop electronic compass system that has serial output signal in NMEA 0183 and demonstrates the possibility of the electronics compass in navigation system for a small sized ship.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2013.06a
• /
• pp.172-174
• /
• 2013

선회조기감지시스템은 조타기-AIS-ECDIS를 통하여 선박 상호간에 조타 상황을 신속히 전달해 주는 시스템을 의미한다. 본 연구에서는 실선실험을 위한 장비구성과 각 단계별로 신호를 추출하고, 추출된 신호를 장비에 실어 송수신하는 하는 내용을 다루고자 한다. 조타기에서는 조타핸들, Autopilot Dial 신호, 그리고 ROT 신호를 NMEA 형식으로 추출하고, 이를 AIS 장비의 특정 또는 다양한 정보영역에 입력하여 송수신하는 방법을 모색한다. 그리고 최종적으로 수신된 AIS 정보를 ECDIS에 표현하는 방법을 제시한다. 이러한 선회조기감지시스템이 구축되면 다양한 실선실험을 통하여 그 성능을 점검할 계획이다.

• Review of KIISC
• /
• v.24 no.2
• /
• pp.56-62
• /
• 2014

최근 건조되고 있는 선박에는 안전 운항을 위하여 엔진제어시스템, 선박자동항법장치, 선박자동식별장치, CCTV 등의 전자장치들이 선박네트워크로 연결되어 있으며, 위성을 통하여 선박의 엔진상태 등의 선박 운항정보를 실시간으로 원격지에서 모니터링 할 수 있다. 선박의 내부와 외부통신 체계는 대체로 폐쇄적인 네트워크로 구성되어 있으나, 선박고유식별번호, 선박명, 선박종류, 항로, 목적항, 입항예정일, 화물종류 등의 선박의 주요 정보를 전송하는 선박자동식별장치는 무선 VHF로 전송되고, 선원은 개인용 컴퓨터를 이용하여 인터넷에 접속이 가능하기 때문에 선박 정보의 해킹 또는 바이러스에 취약해질 수 있다. 컴퓨터 바이러스 또는 해킹 등의 외부 칩입으로 인하여 선박항해시스템의 오류가 발생할 가능성이 높아지고 있다. 본 논문에서는 선박통합네트워크에서 제어네트워크의 표준화 동향과 정보보호 기술의 필요성에 대하여 기술한다.

• Journal of Korean Society of Environmental Engineers
• /
• v.34 no.10
• /
• pp.709-714
• /
• 2012

This study accessed the adsorption characteristics of the nine nitrosamine species on coal-based granular activated carbon (GAC). The breakthrough appeared first for NDMA and sequentially for NMOR, NPYR, NMEA, NDPA, NDEA, and NPIP. On the other hand, NDBA and NDPHA were not detected in the treated effluent for the operation period. The maximum adsorption capacity (X/M) for the seven nitrosamine species with apparent breakthrough points ranged from $27.5{\mu}g/g$ (for NDMA) to $671.0{\mu}g/g$ (for NPIP). Carbon usage rate (CUR) for NDMA was 1.07 g/day, 13.4 times higher than that for NPIP (0.08 g/day). The X/M values for the seven nitrosamine species were fitted well with a linear regression ($r^2$ = 0.94) by their octanol-water partitioning coefficient ($K_{ow}$).

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.21 no.1
• /
• pp.115-122
• /
• 2017

Recently, the on-board equipments of vessels are getting diversifications with high technologies. With changing the trends, the shipboard network is turning to the light-weight ethernet architecture for integrated data management. For that necessity, this paper covers a development of the gateway system which gathers and processes the measured analog or NMEA data from loaded equipments to convert the messages based on IEC 61162-450 (standard for light-weight ethernet network of ships) in engine parts of small vessel. To do this, we analyzed the requirements for standardization of ship's equipments and related studies. To solve the problems of existing equipments, we defined the additional data formats (sentence formatter), developed the gateway system, and verified the utility of the developed system. Consequently, we established an interfacing framework for management and application of the generated data based on the ethernet in vessel.

• Journal of Positioning, Navigation, and Timing
• /
• v.3 no.1
• /
• pp.25-30
• /
• 2014

Differential Global Positioning System-Correction Projection (DGPS-CP) algorithm, which has been suggested as a method of correcting pre-calculated position error by projecting range-domain correction to positional domain, is a method to improve the accuracy performance of a low price GPS receiver to 1 to 3 m, which is equivalent to that of DGPS, just by using a software program without changing the hardware. However, when DGPS-CP algorithm is actually realized, the error is not completely eliminated in a case where a reference station does not provide correction of some satellites among the visible satellites used in user positioning. In this study, the problem of decreased performance due to the difference in visible satellites between a user and a reference station was solved by applying the Multifunctional Transport Satellites (MTSAT) based Augmentation System (MASA) correction to DGPS-CP, instead of local DGPS correction, by using the Satellite Based Augmentation System (SBAS) operated in Japan. The experimental results showed that the accuracy was improved by 25 cm in the horizontal root mean square (RMS) and by 20 cm in the vertical RMS in comparison to that of the conventional DGPS-CP.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.12 no.3
• /
• pp.1313-1318
• /
• 2011

This paper proposes a protocol integration system with multi-threading method for the ship electronic devices to solve problems with the compatibility. The proposed protocol integration system receives the different signals from each of the ships' devices through the RS-232 serial communication port and then divides the input signal into the field data. The required field data for standard signal composition are extracted from among these signal and these are combined in accordance with standard signal format. Thereafter, the protocol integration system transmits the processed standard signal to the auto pilot system through a single port.

• Journal of Advanced Marine Engineering and Technology
• /
• v.35 no.5
• /
• pp.647-653
• /
• 2011

In vessels, various communication systems are now working with different vendor-specific ways, which are apt to cause the inter-operability problems. That, of course, leads to needs of standardization of communication network systems for vessels. The e-navigation system introduced by IMO also takes the standardization process as expected. In this paper, a 4S multiple media communication switching server for seamless communications among existing media for vessels is introduced, and the development of a information exchange software for the sever and its functionality verification results are presented as well.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.17 no.4
• /
• pp.16-23
• /
• 2009

Driving simulators are useful tools not only to test the components of future cars but also to evaluate the telematics service and HMI (Human-Machine Interface). However driving simulators cannot be implemented to test and evaluate the telematics service system because the GPS (Global Positioning System) which contains basic functional support for the telematics module do not work in the VR (virtual reality) environment. This paper presents a method to implement telematics service to a driving simulator by developing the GPS simulator which is able to emulate GPS satellite signals consist of NMEA-0183 protocol and RS232C communication standards. It is expected that the driving simulator with the GPS simulator can be used to study HMI and human-factor evaluations of the commercial telematics system to realize the HiLES (Human-in-the-Loop Evaluation System).