• Title/Summary/Keyword: 안전운항영역

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Establishment of Navigational Risk Assessment Model Combining Dynamic Ship Domain and Collision Judgement Model (선박동적영역과 충돌위험평가식을 결합한 항해위험성평가모델 전개)

  • Kim, Won-Ouk;Kim, Chang-Je
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.1
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    • pp.36-42
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    • 2018
  • This paper considers the Marine Traffic Risk Assessment for fixed and moving targets, which threaten officers during a voyage. The Collision Risk Assessment Formula was calculated based on a dynamic ship domain considering the length, speed and maneuvering capability of a vessel. In particular, the Navigation Risk Assessment Model that is used to quantitatively index the effect of a ship's size, speed, etc. has been reviewed and improved using a hybrid combination of a vessel's dynamic area and the Collision Risk Assessment Formula. Accordingly, a new type of Marine Traffic Risk Assessment Model has been suggested giving consideration to the Speed Length Ratio, which was not sufficiently reflected in the existing Risk Assessment Model. The larger the Speed Length Ratio (dimensionless speed), the higher the CJ value. That is, the CJ value is presented well by the Speed Length Ratio. When the Speed Length Ratio is large, states ranging from [Caution], [Warning], [Dangerous] or [Very Dangerous] are presented from a greater distance than when the Speed Length Ratio is small. The results of this study, can be used for route and port development, including dangerous route avoidance, optimum route planning, breakwater width, bridge span, etc. as well as the development of costal navigation safety charts. This research is also applicable for the selection of optimum ship routing and the prevention of collisions for smart ships such as autonomous vessels.

A Study on the Minimum Safety Distance between Navigation Vessels based on Vessel Operator's Safety Consciousness (선박운항자 안전 의식에 기초한 선박통항 최소 이격거리에 관한 연구)

  • Park, Young-Soo;Jeong, Jae-Yong;Kim, Jong-Sung
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.16 no.4
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    • pp.401-406
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    • 2010
  • Vessel Operator has been navigating with subjective sate distance in accordance with night & daytime, fore & aft, port & stbd abeam and visibility situation. This sate distances may different depending on inside & outside harbor limit, current, wind and visibility situation. By now, the concept of proper sate distance between navigating vessels has been adopted in Korea, using the early 1980's foreign data. And the safe distance is being used with the same value without any consideration of inside & outside harbor and the kind of vessel. So it is necessary to evaluate or search proper distance concept based on different sate consciousness of Korean manners. This paper aims to develop the basic model for marine traffic evaluation and the new model of marine traffic congestion. Also this paper proposes the basic control guideline of vessel traffic service center. The result of this study showed that minimum sate distance should be 4.4L forward, 3.1L aft and 26L abeam in case of good visibility in daytime, considering various parameters such as visibility, day and night. Some differences Here found between the existing minimum sate distance and the new minimum sate distance derived from the result of this study.

Computing the Fuzzy Degree of Collision Risk for Intelligent Ship with VDH (변침도를 고려한 지능형 선박의 퍼지 충돌 위험도 산출)

  • 김은경;강일권;김용기
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2001.05a
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    • pp.153-156
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    • 2001
  • 최근 들어 두드러지고 있는 승조원의 승선 기피현상에 따른 항해인력 부족현상을 근원적으로 해결하기 위하여 선박 항해 전반에 걸친 자동화 및 지능화에 대한 연구가 활발히 진행되고 있다. 특히 선박의 자동화된 항해를 위해서는 영역전문자 수준의 안전성과 정확성이 보장된 충돌회피 시스템이 요구된다. 충돌회피는 자선에서 이루어지는 해상 장애물들에 대한 피항 행위로 그 판단 기준은 각 장애물에 대한 충돌 위험도에 기반한다. 본 연구에서는 DCPA와 TCPA를 이용한 기존의 기법에 변침도(VDH: Variation Degree of Heading)의 개념을 추가하여 새로운 충돌 위험도 산출 기법을 제안한다. 입력변수가 되는 DCPA, TCPA, VDH의 퍼지 소속함수를 산출하고, 이를 기반으로 퍼지 규칙을 이용하여 세부적인 충돌 위험도를 산출한다. 본 연구에서 제안하는 기법은 충돌 위험도 산출시 장애물의 직선운항뿐만 아니라 곡선운항에 대한 경로예측이 가능하다는 장점을 지닌다. 과거의 변침도가 다음시점의 변침에 영향을 끼침으로써 장애물의 이동 경로에 대한 예측이 이루어지고, 이를 기반으로 보다 세분화된 충돌위험도 산출이 이루어진다. 제안된 기법은 DCPA와 TCPA만으로 충돌위험도를 산출해 낸 연구와 비교.평가하여 성능을 검증한다.

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A Detection System of Drowsy Driving based on Depth Information for Ship Safety Navigation (선박의 안전운항을 위한 깊이정보 기반의 졸음 감지 시스템)

  • Ha, Jun;Yang, Won-Jae;Choi, Hyun-Jun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.20 no.5
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    • pp.564-570
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    • 2014
  • This paper propose a method to detect and track a human face using depth information as well as color images for detection of drowsy driving. It consists of a face detection procedure and a face tracking procedure. The face detection procedure basically uses the Adaboost method which shows the best performance so far. But it restricts the area to be searched as the region where the face is highly possible to exist. The face detected in the detection procedure is used as the template to start the face tracking procedure. The experimental results showed that the proposed detection method takes only about 23 % of the execution time of the existing method. In all the cases except a special one, the tracking error ratio is as low as about 1 %.

A Study on Economical Operation of a Ship's Main Engine - The case of Training Ship SAENURI - (선박 기관의 경제적 운전에 관한 연구 - 실습선 새누리호를 중심으로 -)

  • Kim, Hong-Ryeol;Kim, Bu-Gi;Rim, Geung-Su;Kim, Deug-Bong
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.19 no.1
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    • pp.52-58
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    • 2013
  • Operation Abstract : Operational cost required for navigating a ship may differ from according to type, scale, economic speed, navigation area and other factors. However, it is known that the fuel oil price ratio takes 50~60 %. It is the current trend because of the use of poor quality fuel and it is reviewed even for small to medium sized ships to save the operational costs due to the recent rise of international oil price. Furthermore, ocean carriers are taking action to low speed navigation as the alternative method of reducing fuel consumption. Hence, in this study, fuel consumption of main engine was measured by using actual operating ship data compared with sea speed at sea. It was suggested that the area of M/E's load(70 %) lower than NCR is the optimal navigating condition through the relation between speed and fuel consumption compared with advance ratio together with the load.

A Basic Study on the Extraction of Dangerous Region for Safe Landing of self-Driving UAMs (자율주행 UAM의 안전착륙을 위한 위험영역 추출에 관한 기초 연구)

  • Chang min Park
    • Journal of Platform Technology
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    • v.11 no.3
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    • pp.24-31
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    • 2023
  • Recently, interest in UAM (Urban Air Mobility, UAM), which can take off and land vertically in the operation of urban air transportation systems, has been increasing. Therefore, various start-up companies are developing related technologies as eco-friendly future transportation with advanced technology. However, studies on ways to increase safety in the operation of UAM are still insignificant. In particular, efforts are more urgent to improve the safety of risks generated in the process of attempting to land in the city center by UAM equipped with autonomous driving. Accordingly, this study proposes a plan to safely land by avoiding dangerous region that interfere when autonomous UAM attempts to land in the city center. To this end, first, the latitude and longitude coordinate values of dangerous objects observed by the sense of the UAM are calculated. Based on this, we proposed to convert the coordinates of the distorted planar image from the 3D image to latitude and longitude and then use the calculated latitude and longitude to compare the pre-learned feature descriptor with the HOG (Histogram of Oriented Gradients, HOG) feature descriptor to extract the dangerous Region. Although the dangerous region could not be completely extracted, generally satisfactory results were obtained. Accordingly, the proposed research method reduces the enormous cost of selecting a take-off and landing site for UAM equipped with autonomous driving technology and contribute to basic measures to reduce risk increase safety when attempting to land in complex environments such as urban areas.

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A Study on the development of Ship Collision Avoidance Support Program considered Speed (속력을 고려한 선박충돌회피지원 프로그램 개발에 관한 연구)

  • Yang, Hyoung-Seon
    • Journal of Navigation and Port Research
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    • v.31 no.5 s.121
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    • pp.333-338
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    • 2007
  • In this paper, we have studied the ship collision avoidance support on the basis of 'Ship Collision Avoidance Model considered a Speed' for the purpose of the decrease of the human error, caused ship collisions, at sea and the effective support of avoiding ship collisions. The program has been reflected the speed of a target ship, had not been considered in a preceding study. Besides, the program will effectively support a maneuver for a collision avoidance, through the display of a feasible area and the method of a collision avoidance using the own ship's turning characteristic about the action of target ship's course and velocity.

Trends of RFID Technology and Applications for Marine Information Systems (전자태그의 기술동향과 해양정보시스템에의 활용방안에 관한 연구)

  • Jeong, Jung-Sik;Jong, Jae-Yong
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.11 no.1 s.22
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    • pp.39-45
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    • 2005
  • Recently, RFID technology play a key role to implement ubiquitous sensor network(USN). In this paper, we introduce trends of RFID technology, standardization, and then its applications. The purpose of this work is to suggest prosperous applications of RFID, which is applicable on marine information system, such as ship inventory management, management of container and its contents, sensing of environments within cargo hold, management of fishery boats. In case that RFID technology is utilized on marine information systems, it makes safety at sea and marine environments protection.

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An Autonomous Navigation System for Unmanned Underwater Vehicle (무인수중로봇을 위한 지능형 자율운항시스템)

  • Lee, Young-Il;Jung, Hee;Kim, Yong-Gi
    • Journal of KIISE:Software and Applications
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    • v.34 no.3
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    • pp.235-245
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    • 2007
  • UUV(Unmanned Underwater Vehicle) should possess an intelligent control software performing intellectual faculties such as cognition, decision and action which are parts of domain expert's ability, because unmanned underwater robot navigates in the hazardous environment where human being can not access directly. In this paper, we suggest a RVC intelligent system architecture which is generally available for unmanned vehicle and develope an autonomous navigation system for UUV, which consists of collision avoidance system, path planning system, and collision-risk computation system. We present an obstacle avoidance algorithm using fuzzy relational products for the collision avoidance system, which guarantees the safety and optimality in view of traversing path. Also, we present a new path-planning algorithm using poly-line for the path planning system. In order to verify the performance of suggested autonomous navigation system, we develop a simulation system, which consists of environment manager, object, and 3-D viewer.

Trends of RFID Technology and Its Applications (전자태그의 기술동향과 그 응용방안에 관한 연구)

  • Jeong Jung-Sik;Kim Hyun-Jong;Lee Young-Sub
    • Proceedings of KOSOMES biannual meeting
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    • 2004.11a
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    • pp.143-149
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    • 2004
  • Recently, RFID technology play a key role to implement ubiquitous sensor network(USN). In this paper, we introduce trends of RFID technology, standardization, and then its applications. The purpose of this work is to suggest prosperous applications of RFID, which is applicable on marine information system, such as ship inventory management, management of container and its contents, sensing of environments within cargo hold, management of fishery boats. In case that RFID technology is utilized on marine information systems, it makes safety at sea and marine environments protection.

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