• 한국정밀공학회지
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• 제14권4호
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• pp.15-21
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• 1997

Pneumatics is widly used in the industrial implementation, in the operation of air-powered actuators and the control devices needed in their operation. However, there are many empirical factors in pneumatics design, it might cause excessive design of pneumatic components. For that reason, we developed VDES(Vacuum Design Expert System) for the economic design of pneumatic vacuum equipment. VDES is achieved with CLIPS(C Language Integrated Production System) and knowledge base that contains a number of facts and rules for pneumatic vacuum design. Forward chaining and depth first search technique are used in this system. Appling VDES to the actual field, this system is verified to be a good efficiency and could be applied to the field of pneumatic vacuum equipment design.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2016년도 춘계학술대회
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• pp.209-210
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• 2016

글로벌화가 진행됨에 따라 물류서비스에 대한 기대수준이 높아지면서 물류센터의 효율화를 도모하는 물류장비의 도입이 물류센터의 경쟁력을 좌우하는 핵심요인으로 부각되고 있는 상황이다. 물류센터에 도입이 필요한 대부분의 물류장비 고가의 수입제품에 의존하고 있어 국내 물류기업으로서 활용이 어려워 국내 독자기술의 개발이 요구되고 있다. 본 연구진은${\cdots}$(중략)${\cdots}$.

• 대한산업공학회지
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• 제34권3호
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• pp.296-307
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• 2008

A semiconductor production system has sophisticated manufacturing operations and needs high capital investment for its expensive equipment, which warrants efficient real-time flow control for wafers. In the bay, we consider material handling equipment that can handle multiple carriers of wafers. The dispatching logic first determines the transportation time of each carrier to its destination by each unit of transportation equipment and uses this information to determine the destination machine and target carrier. When there is no available buffer space at the machine tool, the logic allows carriers to stay at the buffer of a machine tool and determine the delay time, which is used to determine the destination of carriers in URL. A simulation study shows this dispatching logic performs better than the procedure currently in use to reduce the mean flow time and average WIP of wafers and increase efficiency of material handling equipment.

• 동아시아식생활학회지
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• 제19권6호
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• pp.1039-1048
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• 2009

The purpose of this study was to establish a model of the use-utility of cooking equipments and kitchen centers using survey data and to compare U.S.A. with Korea. The survey was conducted to identify attributes that were related to the efficiency of kitchen centers as well as equipments. Indices for the most important attributes were developed and used to compare different selections of equipment. The impact of adding an equipment item was found to vary with the attributes of the item, the degree of importance ascribed to the attributes of the work center and specific functions performed there. Similarities and differences between the U.S.A. and Korea are discussed, and implications for those who have interest in the use-utility model of cooking equipment and kitchen centers are provided.

• 산업경영시스템학회지
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• 제37권4호
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• pp.193-201
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• 2014

This study attempts to utilize the economic efficiency analysis results focused on the break-even point as an indicator for the decision making of commanders and staff. We suggested a method of determining economic life by utilizing logistics information system and commercial program Minitab with a focus on the equipment's operational environment and performance data, whereas previously the equipment's retirement period was simply determined by the current equipment prices and sustainable period.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.605-608
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• 2008

Storm and flood damage management systems in national disaster management system(NDMS) were organized into three operation systems. They are prevention, preparation, response, and recovery systems. Disaster resources in each system must be promptly and exactly applied to minimize casualties and loss of properties. However, the disaster resources in current management system can not be immediately used in calamity situation due to the lack of efficiency in statistical data. Therefore, it is necessary to classify the emergency restoration equipment for efficient management and mobilization of disaster resources in disaster situation. In this study, field survey was executed to appropriately classify the emergency restoration equipment. Problems and reformation points of the disaster resources system were also presented to improve the classification technique and to construct the data base.

• 반도체디스플레이기술학회지
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• 제18권4호
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• pp.143-148
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• 2019

Numerous pipe lines can be found on various plant-based industrial sites. These pipelines should be periodically checked for defects. Most of these pipelines are internally inaccessible and difficult to visually inspect. Therefore, the inspection is being carried out with the help of non-contact inspection equipment such as ultrasonic flaw detection equipment. The use of ultrasonic flaw detection equipment can raise time and efficiency issues. In order to solve this problem, we will study the basic technology necessary for the development of automated inspection system equipped with ultrasonic measuring equipment and verify the validity through the fabrication of the demonstration device.

• 유공압시스템학회논문집
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• 제3권4호
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• pp.1-7
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• 2006

A water hydraulic pump is likely to have serious problems of high leakage, friction and low energy efficiency. A water hydraulic pump has commonly a fixed displacement type and its outlet flow is adjusted by controlling rotation speed of the pump, which can be implemented by using an electric inverter. This study aims to investigate energy efficiency of the water hydraulic pump system which is driven by an electric inverter. The study is based on the experimental results. The pump which is used in the study shows relatively good efficiency and low leakage, low friction as well. The reasons for the good performance of pump is also investigated.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.289-291
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• 2005

In this paper results of the experiment which used LLC resonant half bridge DC-DC converter to a portable electrical equipment. LLC resonance Half Bridge DC-DC converter which was used in this experiment improved an efficiency because it reduced switching, conduction losses and with synchronous rectifier. As a result of the experiment, this proposed converter could verified an increase of 2% to the efficiency more than diode rectifier.

• 한국건설관리학회논문집
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• 제17권3호
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• pp.116-124
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• 2016

건설현장의 주요 작업인 토공사의 경우, 토공 건설장비를 운용하는 개별 작업자에 의해서 작업의 효율성이 좌우되기 때문에 개별 작업자의 숙련도가 전체적인 공사일정에 큰 영향을 미칠 수 있다. 건설현장에는 그 특성상 현장 내 설치된 구조물이나 장비 혹은 움직이는 작업자들이나 장비 등으로 인해 시야가 가려져서 발생하게 되는 비가시 영역이 필연적으로 존재한다. 이와 같은 작업 관련 시각정보의 부재는 작업자가 건설장비를 효율적으로 운용하는데 있어서 결정적인 저해요소가 된다. 증강현실(AR, Augmented Reality)은 현실세계에 가상물체를 중첩시켜 보여주는 컴퓨터 기술이다. 이 기술의 특성을 이용하면 토공사를 수행하는 과정에서의 시각정보 부재 문제를 해결할 수 있고 이를 통한 건설장비의 작업 효율성 향상이 가능하다. 본 연구의 목적은 이러한 토공사에서의 필요 시각정보를 도출하기 위한 작업-시각정보 맵을 제시하고 굴삭기의 작업들 중 AR기술을 적용하기에 적합한 것을 찾아내는 것이다. 연구의 대상이 되는 건설장비는 굴삭기로 한정하였다. 작업-시각정보 맵은 굴삭기 토공작업의 문제점과 그 문제점을 해결하는데 필요한 시각정보를 기반으로 하여 작성되었다. 이 맵으로부터 굴삭기의 작업 효율성을 향상시킬 수 있고, AR기술을 적용하기에도 적합한 4가지 필요 시각정보가 도출되었다. 연구결과를 바탕으로 하여 추후 건설장비 AR 네비게이터 시스템을 더욱 효과적으로 개발할 수 있을 것이라 기대한다.