• Title/Summary/Keyword: Yard Tractor

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An Estimate of the Required Number of Yard Tractor in Container Terminal (컨테이너터미널의 야드 트랙터 소요대수 추정)

  • Choi, Yong-Seok;Kim, Woo-Sun;Ha, Tae-Young
    • Journal of Navigation and Port Research
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    • v.28 no.6
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    • pp.549-555
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    • 2004
  • The purpose of this study is to estimate the required number of yard tractor on port container terminal. The number of yard tractor is the bottleneck factor on the efficiency of container terminal. Due to the change in travel speed and travel distance, the efficiency is difficult to estimate. The efficiency of yard tractor is estimated by the proposed simulation model that developed considering the queueing network between container crane and transfer crane. The number of yard tractor per container crane is estimated by the alternative analysis. And to determine the number of yard tractor per container crane, the performance measure such as the distance between berth and yard, the speed of yard tractor are simulated.

Electric Yard Tractor with Furtive Charging (Furtive 충전을 활용한 전기식 Yard tractor)

  • Lee, Dong-Su;Lim, Dong-Nam;Jeon, Seong-Jeub;Ko, Young Suk
    • Proceedings of the KIPE Conference
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    • 2014.07a
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    • pp.482-483
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    • 2014
  • In this paper, an electric yard tractor (YT) with furtive charging system is investigated. YT is one of pollution sources in container terminals. The furtive charging system does not impose difficulties on YT day-schedule because charging is performed when a YT is waiting under RTGC (Rubber Type Gantry crane) or Quay-wall crane.

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Development of Infrared-Ray Communication System for Position Recognition of Yard Tractor in Container Terminal (컨테이너터미널 내의 야드 트랙터 위치인식을 위한 적외선 통신시스템 개발)

  • Hong, Dong-Hee;Kim, Chang-Gon
    • Journal of Digital Convergence
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    • v.11 no.1
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    • pp.211-223
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    • 2013
  • In Korea, the location of yard tractors is figured out in real time by using RFID system in container terminals. However, even though the location recognition of RFID system works fine when transfer crane is in yard operation, there are some problems when container crane is in ship operation. That is because yard tractors come one by one to each transfer crane in an order, but yard tractors come in 4 lanes to the container crane, which makes the system impossible to recognize each yard tractor separately. Therefore, we developed the infrared-ray communication system which can recognize yard tractors accurately in not only in the yard operation of transfer crane but also in the ship operation of container crane in same way in this study. The result in this study showed constant number of recognition, and the range of recognition measures 5.7m in 25m distance. The range of recognition shown in this study is enough to recognize each yard tractor passing under container crane separately.

Development of Prediction Model for Yard Tractor Working Time in Container Terminal (컨테이너 터미널 야드 트랙터 작업시간 예측 모형 개발)

  • Jae-Young Shin;Do-Eun Lee;Yeong-Il Kim
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2023.05a
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    • pp.57-58
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    • 2023
  • The working time for loading and transporting containers in the container terminal is one of the factors directly related to port productivity, and minimizing working time for these operations can maximize port productivity. Among working time for container operations, the working time of yard tractors(Y/T) responsible for the transportation of containers between berth and yard is a significant portion. However, it is difficult to estimate the working time of yard tractors quantitatively, although it is possible to estimate it based on the practical experience of terminal operators. Recently, a technology based on IoT(Internet of Things), one of the core technologies of the 4th industrial revolution, is being studied to monitoring and tracking logistics resources within the port in real-time and calculate working time, but it is challenging to commercialize this technology at the actual port site. Therefore, this study aims to develop yard tractor working time prediction model to enhance the operational efficiency of the container terminal. To develop the prediction model, we analyze actual port operation data to identify factors that affect the yard tractor's works and predict its working time accordingly.

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An Economic Analysis of Transportation Equipments at Container Terminals

  • Jung, Sung-Ho;Lim, Dong-Seok;Nam, Ki-Chan
    • Journal of Navigation and Port Research
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    • v.35 no.2
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    • pp.167-172
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    • 2011
  • The motivation of this study is the recent advancement of the Straddle Carrier (S/C). Previously Straddle Carrier (S/C) system was used focusing on container lift on/off due to its lower driving speed than that of (Y/T). Shuttle Carrier is evaluated as an upgraded Straddle Carrier. Recently, however, the driving speed of (S/C) has been improved to the level of Yard Tractor and Trailer systems (Y/T), which is 30Km per hour which makes (S/C) qualified as terminal in-yard transportation equipment. This paper, therefore, aims to evaluate three types of terminal in-yard transportation equipments such as (Y/T), (AGV) and the advanced (S/C) from economic perspective. The results revealed that by observing the total costs of equipment, (S/C) is a cheaper option than (Y/T) over 20 years, and than (AGV) over 6 years.

A Study on the Application of Transfer Equipment Pooling Systems for Enhancing Productivity at Container Terminals (컨테이너터미널에서 생산성 향상을 위한 이송장비 풀링시스템 적용방안에 관한 연구)

  • Cha, Sang-Hyun;Noh, Chang-Kyun
    • Journal of Navigation and Port Research
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    • v.38 no.4
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    • pp.399-407
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    • 2014
  • Due to the increase of container terminals, as the volume of terminals become distributed, the competition of preserving existing volume and inviting new volume are becoming fierce, and various ways for processing terminal volume and inviting volume are being sought. Container terminal efforts to maximize efficiency in order to improve the volume handling capability and productivity by both expansion of the latest equipment and development of the latest terminal system. There are a variety of factors that influence the improvement of productivity at container terminals. Among them, in the case of yard transfer equipment, if it were to convert from the method of a Yard Tractor(YT) being fixed allocated to a certain Gantry Cranes(GC) to a Pooling System that processes in a method that properly distributes and allocates a Yard Tractor(YT) to multiple Gantry Cranes(GC), the terminal productivity and the fusibility of YT may be increased. The KPI which is an indicator for the productivity at container terminals is GC productivity and since GC productivity cannot exceed the speed of physical GC operations, a Pooling System is applied to increase productivity which its meaning and effect is massive. Here in the Report, we produce the Pooling Algorithm system to improve the efficiency of the transported equipments in container terminal which is actually applying for this method and have compared Non pooling system with Pooling system in the fields. By introducing a transfer equipment pooling system and enhancing the productivity compared to other terminals, it may become an essential factor for increasing the continuous service quality and profitability in terms of terminal business.

Detection of AGV's position and orientation using laser slit beam (회전 Laser 슬릿 빔을 이용한 AGV의 위치 및 자세의 검출)

  • 박건국;김선호;박경택;안중환
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2000.11a
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    • pp.219-225
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    • 2000
  • The major movement block of the containers have range between apron and designation points on yard in container terminal. The yard tractor operated by human takes charge of its movement in conventional container terminal. In automated container terminal, AGV(Automated Guided Vehicle) has charge of the yard tractor's role and the navigation path is ordered from upper level control system. The automated container terminal facilities must have the docking system to guide landing line to have high speed travelling and precision positioning. The general method for docking system uses the vision system with CCD camera, infra red, and laser. This paper describes the detection of AGV's position and orientation using laser slit beam to develop docking system.

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Development of docking system using laste slit beam (LSB를 이용한 Docking System 개발)

  • 김선호;박경택;최성락;변성태;이영석
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 1999.10a
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    • pp.309-314
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    • 1999
  • The major movement block of the containers is range between apron and designation points on yard in container terminal. The yard tractor operated by human takes charge of it's movement in conventional container terminal. In unmanned container terminal, UCT(unmanned container transporter) has charge of the yard tractor's role and the navigation path is ordered from upper level control system. The unmanned container terminal facilities must have docking system that guided landing line to have high speed travelling and precision positioning in unmanned container terminal. The general method for docking uses the vision system with CCD camera, infra red, and laser. This paper describes the investigation for the developed docking method in view point of merit and demerit and introduces 속 result of developing the docking system with LSB(laser slit beam).

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Computation of the Shortest Distance of Container Yard Tractor for Multi-Cycle System (다중 사이클 시스템을 위한 실시간 위치 기반 컨테이너 야드 트랙터 최단거리 계산)

  • Kim, Han-Soo;Park, Man-Gon
    • Journal of Korea Multimedia Society
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    • v.13 no.1
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    • pp.17-29
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    • 2010
  • A container terminal productivity is maximized by a minimized time for processing containers. So, we have been elevated the container terminal productivity through an improvement of computing system, but there are a limitation because of problems for transportation management and method. A Y/T(Yard Tractor), which is a representative transportation, is able to do only one process, loading or unloading, at one time. So if the Y/T can do loading and unloading step by step at a same time, the processing time would be shortened. In this paper, we proposed an effective operating process of Y/T(Yard Tractor) Multi-Cycle System by applying RTLS(Real Time Location System) to Y/T(Yard Tractor) in order to improve the process of loading and unloading at the container terminal. For this, we described Multi-Cycle System. This system consists of a real time location of Y/T based on RTLS, an indicating of Y/T location in real time with GIS technology, and an algorithm(Dijkstra's algorithm) of the shortest distance. And we used the system in container terminal process and could improve the container terminal productivity. As the result of simulation for the proposed system in this paper, we could verify that 9% of driving distance was reduced compared with the existing rate and 19% of driving distance was reduced compared with the maximum rate. Consequently, we could find out the container performance is maximized.

Effective Operation Strategies for Pooling Yard Tractors m Container Terminals (컨테이너터미널에서 야드 트랙터 풀링시스템을 적용한 효율적인 운영 전략)

  • Shin, Jae-Young;Kwon, Sun-Cheol
    • Journal of Navigation and Port Research
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    • v.33 no.6
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    • pp.401-407
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    • 2009
  • The improvement in the terminal productivity plays a key role for container terminals to be more competitive. The productivity of yard tractors(YT) is one of the most important factor accelerating the terminal productivity. Thus, YT pooling system is newly introduced in container terminals for increasing the YT productivity. Recently, the terminals in Korea tend to adopt YT pooling system. This paper proposes the important decision factors for YT pooling work space and several types of formulations according to states of container terminals.