• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.04a
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• pp.451-456
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• 2004

This study was performed to analyze the operation system of transfer crone to improve the reality of yard operation roles in container terminal and present the applicable method of operation rules to apply the operation priority. And we derived the procedure to estimate the maximum number of waiting truck based on the waiting of truck and the occupancy of driving lane in yard, and analyzed the constraint state of space. To solve the space constraint, we provided a multi-job principle to define the space resource and described the solution and sequence diagram for the principle.

• Annual Conference of KIPS
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• 2022.11a
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• pp.1050-1052
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• 2022

최근 비대면 수요의 증가와 함께 유통·물류산업은 배송서비스 품질 향상을 위해 전략을 세워왔고, 퀵커머스 배송과 같은 빠른 배송서비스가 일상화되자 소비자의 배송서비스의 품질에 대한 기대치도 높아졌다. 이제는 뉴노멀 시대에 접어들며, 수요 불확실성에 대응할 혁신적 기술이 요구된다. 본 논문에서는 배송서비스 품질 향상 전략으로 도로주행 트랜스퍼 크레인을 메타버스 플랫폼을 통해 제안한다. 트랜스퍼 크레인은 도로의 정체와 상관없이 화물운송이 가능하여 배송서비스 속도 향상과 함께 도로 혼잡비용 감소 등 여러 부가적인 효과를 기대해 볼 수 있다.

• 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.

• Journal of Navigation and Port Research
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• v.32 no.6
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• pp.465-471
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• 2008

As the excessive competition between container terminals has been deepening, not only productivity, but also cost economic of the terminals has been raised. With regard to this, the competitiveness of the terminals is limited because of inefficiency operation of transfer crane(T/C) which needs large amount of energy consumption. Therefore, it is possible that the improvement in the T/C operation leads to saving cost for resources and energy as well as increasing the productivity of the terminals. This study provides 'the K-Means Clustering based Optimized Decision Model for Transfer Crane Operation', referring to 'RFID & RTLS based Port Logistics Initiative' of Ministry of Land, Transportation and Maritime Affairs and estimates the efficiency through simulating.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2002.11a
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• pp.113-119
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• 2002

Recently, an automatic crane control system is required with high speed and rapid transportation. During the operation of crane system in container yard it is necessary to control the crane trolley position and loop length so that the swing of the hanging container is minimized We can do development of unmanned automation control system using automation travel control technique and anti-sway technique in crane system. Therefore, we designed a controller for Automation travel control to control the transfer crane system. Analyzed crane system through simulation, and proved excellency of control performance than other conventional controllers.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2000.11a
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• pp.169-173
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• 2000

현재 컨테이너 터미널에서 사용되고 있는 하역 장비들은 크게 하역작업을 수행하는 크레인과 컨테이너를 운반하는 트레일러, 컨테이너의 하역상태를 파악하는 모니터링 시스템으로 구분할 수 있다. 각각의 장비들은 수동으로 동작되며, 모니터링 시스템에서는 컨테이너의 위치 및 수량 등을 파악한다. 이런 시스템 하에서는 모든 항만 하역 장비들을 사람이 일일이 수동으로 조작함으로써 많은 인력이 필요하다. 또한, 각 하역장비들의 상태를 평면적인 2차원 화면으로만 보여주므로써 모니터링 시스템에 대한 현실감이 떨어진다. 이와 같은 단점을 보완하기 위해 컨테이너를 자동으로 운반하는 AGV를 도입하고 트랜스퍼 크래인과 컨테이너 크레인의 일부분을 자동화하여 작업능률을 향상시키고, 여기에 3차원으로 표현된 VR 시스템을 도입하여 각 하역장비들에 대한 세세한 동작까지를 모니터링함으로써 사용자가 현장에 있는 것과 유사한 느낌을 가질 수 있도록 하였다. 본 논문에서는 이러한 3차원 VR시스템과 모형으로 만들어진 AGV와 컨테이너 크레인, 트랜스퍼 크레인간의 유기적인 데이터 송,수신 및 안정적인 통신을 위해 데이터 포맷에 대한 연구를 하였다. 이런 데이터 포맷의 결정은 손실 없는 통신을 보장하며 나아가 정확한 모니터링을 보장할 것이다.

• Journal of Navigation and Port Research
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• v.30 no.6 s.112
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• pp.525-531
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• 2006

In the port, the yard crane is very important. If a container crane or a transfer crane is broken down, it costs a lot because of the delay of work during the period of repair or reorder. But, we don't have enough spare parts because of the high cost. It is necessary to maintain high reliability of the crane through effective preventive maintenance and failure analysis. In this paper, we analyse the function and failure mechanism of the transfer crane which is a main equipment in the yard Also, we standardize failures and maintenance works using the historical data of failure and maintenance. This study which is a basic work for effective equipment operation and maintenance will support reliability engineers to decide the optimal design of the next generation equipment and operational policy of equipment.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06b
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• pp.363-366
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• 2006

In the port, Yard Crane is very important. If container crane or transfer crane broke down, it costs much money for delaying of work during the period of repair or reorder. But, we can not have enough spare parts for its high cost. It is necessary for having the reliability of crane through the effective preventive maintenance and failure analysis. In this paper, we analysed the system's function and failure mechanism of transfer crane which is main equipment in the yard. Also, we standardized the failure and maintenance work using the historical data of failure and maintenance. This study which is the basic work for IT of equipment operation and maintenance is going to be new attempt for optimal design of next generation equipment and operation policy of equipment.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1998.10a
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• pp.309-313
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• 1998

Delay time of receiving and delivery is one of important factors that should be considered in the evaluation of the customer service level of a container terminal. In this study, dispatching rules are tested with the objective of minimizing the service delay time for arriving outside trucks. A dynamic programming model is suggested for a static dispatching problem in which all the truck arrivals are known in advance. In order to overcome the excessive computational time of the dynamic programming technique, several heuristic rules are suggested that can be applied in practices. A simulation study is carried out to test the performances of the heuristic rules.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.515-520
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• 2002

Automatic Transfer Crane is needed for automation of container terminal. It requires the control capability of exact position for loading/unloading job in yard. But it has the limitation of improvement because it has the operational environmental and its structural problems. It has the positioning errors caused by the deformation of rail, yawing motion of crane, wear of wheel, sliding motion between wheel and rail and so on. This study shows the calibration method of crane position by using the primitivity sensor and calibrating plate fixed on the ground.