• 한국항행학회논문지
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• 제12권3호
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• pp.215-219
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• 2008

최근 물류의 양이 증가함에 따라 컨테이너를 사용한 해상 물동량이 급격히 증가되어 부두에서 처리하여야할 컨테이너 양이 많이 증가되었다. 이에 항만에서의 물류비용 절감을 위해 항만 자동화에 관한 관심이 증대되고 있다. 항만의 자동화는 선박에서 컨테이너를 운반할 트레일러가 통과하는 RFID를 이용한 게이트의 자동화, 정박한 선박에 실려 있는 화물을 취급하는 Quay-Side 컨테이너 크레인(QC)의 자동화, 야드에서 컨테이너를 이적하는 갠트리크레인(GC), 게이트 사이에서 컨테이너를 수송하는 컨테이너 트랜스 포터의 자동화로 크게 분류할 수 있다. 부두의 운용 효율을 증가시키기 위해서는 야드 크레인의 정확한 위치 검출이 상당히 중요한 과제이다. 본 논문에서는 UWB위치인식 시스템을 적용한 야드 크레인의 자동화에 대하여 논의하고 개발방향을 제안한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.907-910
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• 2007

최근 물류의 양이 증가함에 따라 컨테이너를 사용한 해상 물동량이 급격히 증가되어 부두에서 처리하여야할 컨테이너 양이 많이 증가되었다. 이에 항만에서의 물류비용 절감을 위해 항만 자동화에 관한 관심이 증대되고 있다. 항만의 자동화는 선박에서 컨테이너를 운반할 트레일러가 통과하는 RFID를 이용한 게이트의 자동화, 정박한 선박에 설려 있는 화물을 취급하는 Quay-Side 컨테이너 크레인(QC)의 자동화, 야드에서 컨테이너를 이적하는 갠트리크레인(GC), 게이트 사이에서 컨테이너를 수송하는 컨테이너 트랜스 포터의 자동화로 크게 분류할 수 있다. 부두의 운용 효율을 증가시키기 위해서는 야드 크레인의 정확한 위치 검출이 상당히 중요한 과제이다. 본 논문에서는 UWB위치인식 시스템을 적용한 야드 크레인의 자동화에 대하여 논의하고 개발방향을 제시하고자 한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.277-281
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• 1997

Reliab~l~ty englneerlng IS regarded as the major and important roll for all Industry And advanced nianufactur~ng systems w~th h~gh speed and lntell~gent ha\\ulcorner been dcvelop~ng for betterment of lnachln~ng db~l~ty In th~study, Me have rystem~~ed c\, ~luat~on c r f relidb~litl for nldchlntry system We proposed the rel~ab~l~ty asvxmcnt and dci~yned and manufactured r~ildb~llty tcst-bed to eualuate rcl~dbil~ty In ddd~t~on we acquired relldb~l~ty data uslng test-bed sydem and mde database to handle relrab~l~t) data And also he not only use rel~ab~l~ty data by andlyzlng rel~ab~l~ty, but also apply design revlew method usmg analycing crltlcal unlt5 of machlnery system From th~s stud), he u ~ l l expect to gu~de md Increase the rel~ab~l~t) englneerlng in devclop~ng and procerslng phase of h~gh qualrty product

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1668-1673
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• 2007

In light of the growing traffic congestion problem and congestion cost, the container transport by railway has to be increased. The freight transport by railway can have decided advantages over trucks in terms of energy efficiency, emissions and cost for certain freight movements, just as transportation in the metropolitan region can have great advantages over driving truck. But the freight transport by truck should gain significant mobility benefits from a freight railway system. Thus, the DMT(Dual Mode Trailer) transport system which is coupled railway transport advantages with load transport advantages has been developed and used in the european countries. The DMT transport will therefore serve the areas required by transport organizers. This paper describes the various DMT transport systems and its strength and weakness.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
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• pp.570-574
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• 2008

본 논문의 핵심인 'RFID(900MHz)를 활용한 GATE 무정차 시스템'은 차량(트레일러)이 터미널에서 컨테이너를 반입/반출하기 위하여 GATE 통과 시 RFID를 연계하여 무정차로 차량의 정보를 인식하고, 터미널에서 제공하는 컨테이너 정보를 차량에 설치되어 있는 RFLDU 단말기에 자동으로 관련 정보를 제공하는 시스템을 말한다. 이를 설계 및 구현을 위해 RFID 기술 부문에서는 UHF대역(900MHz)의 RFID 태그(Tag) 및 리더(Reader)기를 사용하였으며, 원활한 데이터를 수집 및 처리(운영)를 위해 RFID 미들웨어 및 응용 프로그램을 구현하였다. 또한 본 논문에서 구현된 시스템을 실제 항만 부두에서 실험 및 운영을 통해 본 시스템의 안정성을 검증하였으며, 검증된 결과를 통해 차량(트레일러) 및 터미널의 생산성을 극대화 및 물류비용을 절감이 발생할 것으로 사료된다.

• 한국산학기술학회논문지
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• 제15권3호
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• pp.1279-1287
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• 2014

한국 정부는 부산신항을 세계 2위의 환적중심 항만으로 육성하기 위한 정책 목표를 수립하고 있다. 본 논문은 이와 같은 정책 목표 달성의 한 가지 방법으로 타부두 환적의 효율적인 처리방안 제시를 목적으로 한다. 본 논문에서는 먼저 부산신항의 타부두 환적 물동량에 대한 장기 예측결과를 제시한다. 다음 부산신항의 타부두 환적을 처리할 수 있는 시스템적 대안으로 Double stack Multiple Trailer System(DMTS)와 궤도식 시스템 대안을 제시한다. 각 시스템 대안의 부산신항에 적용방법을 소개하고, 예측된 타부두 환적 물동량을 처리하기 위한 대안별 시스템 소요량 및 도입비용을 산출한다. 특히, DMTS의 경제성 분석결과 B/C = 3.7을 확보할 것으로 예상되고, 재무성 분석결과 현행 톤${\cdot}km$ 당 요금을 현행 대비 67%까지 인하할 수 있어 부산신항 타부두 환적을 효율적으로 처리할 수 있는 유력한 대안으로 판단된다.

• 한국항만학회지
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• 제7권1호
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• pp.43-58
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• 1993

There has been fast progress in economy in Korea derived by a consecutive five-year plan program for economic development started in the early 1960's. In the field of transportation, rapid changes in the technological environment of transportation and communication have brought a revolution of the transport system, of which inter-modal transportation through containerisation is typical. Because of the rapidly growing traffic volumes of cargo, especially container traffic, and lack of investment into transport infrastructure in the past, both road and railway are beyond their capacity. As a result, the public-road network has suffered a serious congestion problem. For instance, in relation to the corridor between Seoul and Pusan, today, it takes about 14 hours for the journey of container trailer through Kyongbu Expressway, for which it used to take only 7 hours in 1986. For the railway, though the congestion problem is not very serious compared with the road sector, a shortage of capacity on certain main lines has emerged as a problem as railway traffic has increased. Furthermore, the further expansion of the system in near future is difficult due to burden of higher construction the cost. Unlike these two modes, coastal shipping, which has been paid relatively less attention for commodity transport in Korea, shows no constraint in this respect. In addition, it is the most cost efficient mode of transport. This work therefore aims to make a proposal for the alternative inland transportation mode, which is to promote the coastal transport of container. Three obstructing factors for the promotion of the coastal transport are investigated and some solutions for those are suggested as follows : First, it appears to be essential to provide exclusive ports for the coastal shipping, that comply with simplification, specialization and rationalization. The optimum size of berths on the exclusive ports in Pusan port is estimated as 16-20. We found that it needs periodical study and publicity on the advantages from the adoption of the coastal mode. Inducing competition in the coastal shipping market is also necessary. For the supply of the fleet in the coastal shipping, chartering of the surplus ships in the oversea shipping is found to be more desirable than new shipbuilding. Second, to solve the fragmentation of the companies which wish to participate in the coastal transport, government has to implement the subsidy policy. The encouragement of participation of the shipping lines engaging in Korea-Japan run and Korea-East South Asia run, into coastal shipping also needs to be considered cautiously. Third, simplification of the document for entry in ports is needed for rational coastal shipping management. We can use B/L (Bill of Lading) for coastal shipping as a prerequisite to get the indemnity by P & I Club. The reduction of the government controls on entering and leaving the ports also needs.

• 한국철도학회논문집
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• 제12권3호
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• pp.348-356
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• 2009

본 연구의 목적은 SP 조사를 통해 화물별 DMT 효용함수 추정에 목적을 두고 있다. 추정된 효용함수는 화물별 OD 자료를 바탕으로 DMT 수요예측에 기초자료로 이용될 수 있다. 설문조사에서는 컨테이너와 위험물을 다루고 있는 업체와 철강운송 업체 중 연안 해운을 하고 있지 않은 운송업체를 대상으로 철도운송, 도로운송, DMT, 이렇게 세 가지의 선택대안을 사용하였다. 선택상황은 품목별/운송방향별로 가상 상황을 설정하였고 선정한 주요 화물품목은 컨테이너, 철강, 위험물이다. 또한 각각의 화물품목들에 대한 운송거리별 운송수단 선택모형은 통계적으로 다르지 않은 것으로 분석되었기 때문에 거리별(장거리, 중거리, 단거리)로 모형을 구축하지 않고 가장 물동량이 많은 장거 리(300km 이상)의 경우에 한해 화물별로 모형구축을 시도하였다. 사용할 속성변수로는 운송시간, 운송비용 그리고 신뢰성을 선정하였다. 수준 수는 일반적으로 가장 많이 사용되는 3수준으로 정하였으며 수준 값은 기준 값을 중심으로 +10%와 -20%로 정하였다.

• 한국산업융합학회 논문집
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• 제26권1호
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• pp.193-199
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• 2023

In this study, an analysis was conducted to analyze the structural stability of the piezoelectric power generation module and to determine the optimal burying hole interval for concrete, the installation site of the power generation module. A piezoelectric element refers to a functional ceramic having a piezoelectric direct effect that converts mechanical energy into electrical energy and a piezoelectric reverse effect. In the analysis of the piezoelectric power generation module, the load condition was applied with about 16 tons and a total of 10 wheels in consideration of the container trailer. The purpose was to evaluate the stability of major components of the piezoelectric power generation module through finite element analysis. In order to determine the optimal burying location of the concrete ground for burying the piezoelectric power generation module, the stability of the ground structure according to the distance of the holes was determined. As a result of the analysis, the maximum stress of the piezoelectric power generation module was generated in the support spring, showing a stress of about 276.7 MPa. It was found that the spacing of holes for embedding the piezoelectric power generation module should be set to a minimum of 100 mm or more.

• International Journal of Automotive Technology
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• 제6권3호
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• pp.221-227
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• 2005

Aim of this study is to investigate an aerodynamic effect of a drag-reducing device on a heavy-duty truck. The vehicle experiences two different kinds of aerodynamic forces such as drag and uplifting force (or downward force) as it is traveling straight forward at constant speed. The drag force on a vehicle may cause an increase of the rate of fuel consumption and driving instability. The rolling resistance of the vehicle may be increased as result of the negative uplifting or downward force on the vehicle. A device named roof-fairing system has been applied to examine the reduction of aerodynamic drag force on a heavy-duty truck. As for a engineering design information, the drag-reducing system should be studied theoretically and experimentally for the best efficiency of the device. Four different types of roof-fairing model were considered in this study to investigate the aerodynamic effect on a model truck. The drag and downward force generated by vehicle has been obtained from numerical calculation conducted in this study. The forces produced on four fairing models considered in this study has been compared each other to evaluate the best fairing model in terms of aerodynamic performance. The result shows that the roof-fairing mounted truck has bigger negative uplifting or downward force than that of non-mounted truck in all speed ranges, and drag force on roof-fairing mounted truck has smaller than that of non-mounted truck. The drag coefficient $(C_D)$ of the roof-fairing mounted truck (Model-3) is reduced up to $41.3\%$ than that of non-mounted trucks (Model-1). A downward force generated by a roof-fairing mounted on a truck is linearly proportional to the rolling resistance force. Therefore, the negative lifting force on a heavy-duty truck is another important factor in aerodynamic design parameter and should be considered in the design of a drag-reducing device of a tractor-trailer. According to the numerical result obtained from present study, the drag force produced by the model-3 has the smallest of all in all speed ranges and has reasonable downward force. The smaller drag force on model-3 with 2/3h in height may results of smallest thickness of boundary layer generated on the topside of the container and the lowest intensity of turbulent kinetic energy occurs at the rear side of the container.