• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.1
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• pp.119-124
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• 2006

A novel high frequency insulated soft switching PWM DC-DC converter circuit is proposed and then it is achieved the high-efficiency. This converter does not use the o(citing current of a high frequency transformer but use inductance. Then it realizes a widely stable zero voltage switching operation with the use of a novel ON-OFF control method at synchronized rectification power MOSEFETs of the high frequency insulated transformer secondary. Therefore, it is brought over 97[%] measurement efficiency by proposed DC-DC converter.

• 기계와재료
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• v.25 no.3
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• pp.6-15
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• 2013

유압프레스의 단점을 극복하기 위해서 서보모트를 장착하여 성형속도를 높인 서보 유압프레스를 개발하게 되었으며, 특히나 서보모터를 국내산으로 적용하여 듀얼형으로 유압시스템의 효율성을 높여 최종적으로 개발함으로써 서보 유압프레스를 완전 국산화하였다. 또한 하사점 위치 제어의 용이성을 확보하기 위해 프레스 램용 메인 실린더에 톱니나사부를 만들어 임의의 위치에 정지할 수 있는 정지정도 및 하사점 위치 제어정밀도를 향상시켰으며, 유량의 미세 제어를 통해 프레스 램의 동작성을 개선코자 하였다. 다이쿠션은 메인 실린더와의 연계 제어를 통해 제품의 손상 방지 및 제품 추출의 용이성을 확보하였으며, 소재의 종류나 제품의 형상 특성에 따라 프리모션 제어가 가능한 지식기반형 자율제어 시스템을 적용하였다. 듀얼 서보시스템과 유압펌프가 연계구동함에 따라 기존 유압프레스 보다 약 40%이상의 에너지절감을 달성할 수 있을 것으로 예측되며, 현재 에코머신 인증제도에 대한 논의가 활발한 시점에서 매우 적합하고 필요한 하이브리드형 서보 유압프레스의 국산화 개발 사례라고 하겠다.

• Journal of the Korea Society of Computer and Information
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• v.15 no.10
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• pp.191-200
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• 2010

The "intelligent internet power outlets" realized in this study use Internet environment to connect electrical and electronic products to the Net as well as to enable remote monitoring and control. They also have temperature and light sensors, and even offer scheduling options by means of a universal calendar run by an inner real-time timer. Furthermore, they control 4 outlets handling 4 external input conditions and infrared remote control with easy-to-use functions for home automation control. The user interface is equipped with an embedded Web server and UDP protocol handler, and which also allows special control programs be used with the Web browser. Thus, installing this real-time power control function with optimal scheduling and various communication functions will provide you with energy-efficient power outlets outfitted with the increasingly popular "standby power" electric power efficiency.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.64-76
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• 2009

Recently, the ubiquitous environment and the practical technology associated with it become more popular topic along with the rapid development of wireless technologies. The necessity of the automated system based on the ubiquitous environment has been increasing when the concept of the ubiquitous is integrated into the fields of existing IT. Also, the necessity of formulating a power-saving plan on large buildings and public institutions is gathering strength because of a raise in exchange rates and high oil prices. In this paper, to efficiently manage the power consumption of the electronic machine such as electric lights, electric heaters, and air conditioners in a building, power-saving manage- ment system using RFID/USN technologies is proposed. Proposed system controls the electric machine and monitor it's condition by RFID and collects the real time information about the surrounding and the power consumption of the electric machine by USN. Especially, proposed system analyzes the real time information and supports the intelligent scheduler with the best power-saving. Finally, this paper shows the difference between proposed system and existing system and establishes thereality of our system through experiments in variety environments.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.7
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• pp.1532-1535
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• 2009

This paper describes a K-band CW radar transceiver suitable for power saving motion sensor. The presented transceiver module is designed and contains patch antennas, dielectric resonator oscillator (DRO), IF amplifier, mixer, divider. The designed divider and antenna are measured and the transmitting frequency and the power were fairly good for using in commercial applications. The transceiver is manufactured with a dimension of 35${\times}$35${\times}$10(mm) and can be adapted in various applications.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1715_1716
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• 2009

본 연구는 지능형 도로의 라인조명의 제어 기능을 수행하기 위한 구동 및 조광회로 설계와 유지관리 시스템의 기초 연구로서 기본적으로 중앙관제센터에서 무선과 유선의 원격제어를 통하여 조명기구의 개별 전원 제어 또는 단전, 부분 점멸동작을 수행 하고 램프의 불량 상태를 확인할 수 있는 기능을 포함한다. 부가적으로 조명등의 절전과 효율적인 관리를 위하여 차량의 유무에 따라 조도와 점멸 제어 기능을 추가 하였다. 또한 원격제어에 따른 중계 제어 장치를 등기구와 병열 구성 하여 통신선과 전원선 만으로 Line 형태의 램프에 전력 및 통신 제어를 가능케 하는 시스템을 개발하였다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.11
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• pp.51-55
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• 2007

Generally, PLC (Power Line Communication) based home automation devices such as wall switch, walt socket, gas controller, etc, must maintain wake-up status at all time to control other electronic devices and monitor their on/off status whether they are in service or not. In order to reduce the unnecessary energy consumption during the standby mode, the new power-saving PLC 2 ports wall switch has been developed, separating PLC communication part and controller part and introducing sleep mode. In addition, to expand life cycle of PLC product and to reduce the rate of product failure in active mode, the instant controlling method in controlling process is adopted instead of the maintenance controlling method. In comparison to the earlier model, the new 2 ports PLC wall switch has reduced power by 0.95[W] less in standby mode and 3.2[W] less in active mode than the previous one.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.175-176
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• 2013

Currently barbola has been considered in Korea. The artistry of it has been studied. Interior design barbola has developed from an art activity to a real life product. Interior design is meant to total design activity to satisfy all condition both function and emotion suited for the goal of interior space human dwells. We study the product technique of optic media barbola sculpture with affection and refinement to use traditional superior onion on optic media and permeability in order to apply the artistry of barbola to interior design. We make real sculpture using it. The mineral electric radiation sheet in this research includes 0.2mm thickness with low power, high brightness, and non-heat. The result of this study contains a new type and narrative beyond the limitation of the traditional barbola. We make power saving lighting sculpture through it.

• Journal of Broadcast Engineering
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• v.15 no.4
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• pp.461-473
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• 2010

Since eco friendly and power saving products recently got into the limelight for the protection of environment, LED light technology has caught much of attention as the next generation broadcasting lighting. The newly introduced light source has such advantages as higher efficiency, longer life and its slim and compact forms leading to conveniency in installations. When combined with digital light control it gives more dynamic and various features to lighting. In this paper, used CIE standard for measuring light sources by their purposes and forms to make a comparative analysis of spectral distribution and color rendition of LED light source to those of existing lighting systems. By means of the cast shadowing and color reproduction tests I also tried to figure out the effects of LED lighting design on TV visuals where higher quality is crucial with the audience's increasing demands for quality image.

• Journal of Korean Association for Spatial Structures
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• v.15 no.1
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• pp.8-13
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• 2015

본 기사에서는 실 사회기반시설물 및 건축물에 적용 가능한 무선 센싱 시스템을 소개하였다. 이는 실용성 및 적용성을 높이기 위해 일방향의 계층형 무선 통신 네트워크 형태를 가지며, 절전 기능을 사용한다. 또한 웹-기반의 관리 프로그램을 통해 원거리에 위치한 구조물의 구조반응을 언제, 어디서든 확인할 수 있다. 이는 자동 계측 및 무선 통신 기법을 사용하기 때문에 설치가 용이하고, 시공 작업의 방해가 적으며, 설치 이후의 유지관리 비용을 절감할 수 있는 이점이 있다. 그러나 실 구조물의 정확한 SHM을 위해서는 계측값의 분석 및 건전도평가 등에 관한 신뢰할 만한 기술 개발이 여전히 요구된다.