• Title/Summary/Keyword: Terminal block

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Development of Operation Strategy to improve Efficiency for Twin Automated Transfer Crane in an Automated Container Terminal

  • Park, Byung-Joo;Choi, Hyung-Rim
    • Journal of Navigation and Port Research
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    • v.31 no.7
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    • pp.605-611
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    • 2007
  • In order to become a mega hub port, major ports all over the world are making every effort to enhance their productivity through efficiency of internal operation. Accordingly, in order to enhance the competitiveness of a container terminal, an automated container terminal is considered as the best alternative. An automated container terminal is using such automated handling equipment as AGV(Automated Guided Vehicles) and ATC(Automated Transfer Crane). The efficient equipment operation plays a critical role in enhancing the productivity of an automated container terminal. In an automated container terminal, the most important equipments are AGV and ATC. Each block of containers with a vertical layout is generally operating two ATCs. The two ATCs can be crossed or not at each block. In the case of operating crossover ATC, it has an advantage of high flexibility that ATC work is possible at both TP(Transfer Point) of each block. But it has also a disadvantage that the yard has to be operated at a low storage level of containers in the terminal yard. Recently, for automated container terminals, which are being prepared for opening in Korea, they plan to use uncrossed twin ATC in order to make the storage level of their yards high at a low cost. Therefore, studies have to be made in order to increase the efficiency of twin ATC system based on the flexibility that the crossover ATC system has. This research aims to suggest an operation strategy to improve efficiency of twin ATC at each storage block in a yard.

Analysis of the Risk of Heat Generation due to Bolt Loosening in Terminal Block Connector Parts (볼트풀림에 의한 터미널 블록의 접속부 발열 위험성 분석)

  • Yeon, Yeong-Mo;Kim, Seung-Hee
    • Fire Science and Engineering
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    • v.34 no.3
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    • pp.67-75
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    • 2020
  • In this study, the risk of heat generation due to normal and overload currents that vary with the abnormal loosening angle of wire-connecting bolts were identified. The risks were analyzed based on the thermal characteristics to minimize the carbonization accidents of terminal blocks inside distribution panels typically used in industrial sites. We applied a method for measuring the heating temperature and temperature variations in the terminal blocks in real-time by installing a resistance temperature detector sensor board in the terminal block. The experimental results showed that the terminal block model with a low-rated current exhibited a higher heating temperature, thus, confirming the need to select the terminal block capacity based on load currents. Additionally, the higher the rated current of the terminal block with a high-rated current and the higher the degree of loosening, the faster the carbonization point. Such heating temperature monitoring enabled real-time thermal temperature measurement and a step-by-step risk level setting through thermal analysis. The results of the measurement and analysis of carbonization risks can provide a theoretical basis for further research regarding the risk of fire due to carbonization. Furthermore, the deterioration measurement method using the temperature sensor board developed in this study is widely applicable to prevent fires caused by poor electrical contact as well as risk-level management.

A Study on the Electrical Fire Risk of Terminal Block Due to Single and Composite Cause (단일 및 복합 원인에 의한 단자대 전기화재위험성에 관한 연구)

  • Kim, Si-Kuk;Gum, Dong-Shin;Lee, Chun-Ha
    • Fire Science and Engineering
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    • v.29 no.5
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    • pp.57-66
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    • 2015
  • This thesis is based on a research to investigate the electrical fire risk due to the single and composite cause in a terminal block. This paper analyzed the thermal characteristics depending on the screw torque change and contact resistance change to measure the fire risk due to the poor contact from single cause first. To measure the fire risk due to the composite cause, the acceleration tracking depending on the contact resistance change was experimented to check the correlation of poor contact and tracking to fire. The experiment result showed that the thermal characteristics were clearer as the screw torque in poor contact status and magnitude of contact resistance increased and that the thermal characteristics of terminal block depending on the contact resistance change was more reliable than the thermal characteristics depending on the screw torque change. Moreover, the terminal block poor contact and tracking were correlated in the case of the composite cause, and when two composite causes were interacted, the electrical fire risk was higher than the single cause.

A Study on Cooperative Communication using Space-Time Codes

  • Pham, Van-Su;Mai, Linh;Lee, Jae-Young;Yoon, Gi-Wan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2007.06a
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    • pp.87-90
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    • 2007
  • In cooperative communication systems, the source terminal transmits signal to the destination terminal with the aid of partner terminals. Therefore, the source terminal obtains extra spatial diversity gain. As a result, its performance is enhanced in term of higher achievable transmission rate, the larger coverage range, and the lower bit-error-rate (BER). Space-time codes (STCs) have been applied to cooperative communication systems in distributed fashion, in which the signal is spatially time exploited to obtain gains analogous to those provided by STCs. In this work, we consider the application of orthogonal Space-time Block Codes (OSTBCs) to the cooperative communication systems to further achieve higher diversity gain. The advances of the proposed approach are verified via computer simulations.

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A Study on Simulation of Remarshalling Work in an Automated Container Terminal (자동화 컨테이너터미널의 이적작업에 관한 시뮬레이션 연구)

  • Lee Joo-Ho;Choi Yong-Seok
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2004.11a
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    • pp.203-208
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    • 2004
  • The objective of this study is to analyze the efficiency of marshalling work using ATC(automated transfer crane) for ACT(automated container terminal). It is important fact to assignment of containers, because the character of ACT which block layout is vertical for berth and there are four other works which are inbound, oubound, loading and unloading in one block. And then there is need which assignment of containers with remarshaling work using ATCs in one block. Therefore, we analyze the efficiency of remarshaling work using simulation and suggest the assignment methodology of containers in yard

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A Study on the Properties Analysis and Estimation of Odor Detection System (향 검지 시스템의 특성 해석 및 평가에 관한 연구)

  • Choi, Chung-Seog
    • Fire Science and Engineering
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    • v.23 no.2
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    • pp.1-5
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    • 2009
  • We studies wish to investigated establishment form of cabinet board, and confirm possibility of electrical disaster prevention through reappearance experiment of odor detection system. Established breaker consists of MCCB, RCD order in cabinet board for house, but industry is used together with. When imposed shock using shaker to terminal block that contact becomes in appropriate, flame was made sure. According to result that experiment attaching odor capsule in terminal block, capsule commissioned exactly by occurred heat. According to establishment position of sensor, difference of inspection time was about 10 seconds. Estimate odor inspection system by thing which electrical device accident prevention is available. When there is abnormal generated heat in connection of electric wire, accident prevention estimates that is possible by giving an alarm state of overheat to administrator.

Variation of Sink Components in Response to Removal Time of Upper Leaf on Main Stem in Soybean (주경 상부엽 제거시기가 콩의 절위별 Sink형질 변이에 미치는 영향)

  • 박춘봉;이중호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.40 no.1
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    • pp.16-25
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    • 1995
  • The effects of leaf removal time on variation of nodal sink components in determinated soybean [Glycine max (L.) Merr.] cultivar 'Danyeobkong' were measured at the experiment field of Chonbuk Provincial Rural Development Administration in 1991. Node order in this experiment was calculated from terminal node to bottom node to clarify the photosynthetic ability of canopy leaves. The upper 5 leaves from terminal node of main stem were removed at 5, 15, 25, 35 and 45 days after flowering(DAF) respectively. In spite of light-receiving increment in lower part of main stem and in branch by removing the upper part leaves of main stem, seed weight of that part was not increased in leaf removal treatment compared with control block. The node position reducing pod went down from terminal to bottom by delaying leaf removal time, and the influence of pod number reduction was bigger in DAF 25 than in DAF 15. But the seed number reduction per pod was the biggest in DAF 35. Cracked seed coat ratio ranged from 25% to 35% in control block, while that of leaf removal block had mostly 10% gap compared with the control block.rol block.

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Allocation Model of Container Yard for A TC Optimal Operation in Automated Container Terminal

  • Kim, Hwan-Seong;Nguyen, DuyAnh
    • Journal of Navigation and Port Research
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    • v.32 no.9
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    • pp.737-742
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    • 2008
  • In this paper, we deal with an allocation model of vertical type container yard for minimizing the total ATC (Automated Transfer Crane) working time and the equivalence of ATC working load in each block on automated container terminal. Firstly, a layout of automated container terminal yard is shown The characteristic of equipment which work in the terminal and its basic assumption are given Next, an allocation model which concerns with minimizing the total working time and the equivalence of working load is proposed for effectiveness of ATC working in automated container terminal. Also, a weight values on critical function are suggested to adjust the critical values by evaluating the obtained allocation plan. For ATC allocation algorithm, we suggest a simple repeat algorithm for on-line terminal operation.

A Comparison of the Efficiency of HSS Yard Layout at Container Terminal (HSS 컨테이너 터미널에서의 장치장 블록 배치 효율성 비교)

  • Ha, Tae-Young;Choi, Sang-Hei
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.1
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    • pp.345-352
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    • 2006
  • The purpose of this paper is to evaluate the efficiency of two yard layout of HSS at container terminal, one is that the container yard blocks are placed horizontally in parallel with berth, the other is that the yard blocks are arranged vertically in perpendicular to the berth. In stevedoring system of container terminal, stacking and transport performance are influenced according to block arrangement type of yard. Therefore, efficient design that can improve stacking and transport performance is required. In this paper, we compared their efficiency of two block arrangement concepts in terms of storage capacity, productivity, facility investments, truck service level.

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A Study on Remarshaling Operation in Automated Container Terminal (시뮬레이션을 이용한 자동화 컨테이너터미널의 이적운영규칙에 관한 연구)

  • 윤원영;이주호;최용석
    • Journal of the Korea Society for Simulation
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    • v.12 no.3
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    • pp.21-29
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    • 2003
  • The operation rules to remarshaling works in yard is very important in automated container terminal (ACT). However, the decision rules for conventional container terminals have some restrictions to be applied to ACT whose block layout Is vortical for berth. The objective of this study is to propose the efficient operations rules for remarshaling works of automated transfer crane (ATC) in ACTs. Then, the various operation rules are simulated to verify the proposed operation rules. The results of the simulation study on various rules are provided and discussed.

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