http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
루미나리에(Luminarie)용 고출력 LED패키지 배광분포 모델링 및 광학적 특성 분석
조재문,김병일,곽준섭,윤동주,유진열,Cho, Jae-Moon,Kim, Byung-Il,Kwak, Joon-Seop,Yoon, Dong-Joo,Yu, Jin-Yeul 한국광학회 2007 한국광학회지 Vol.18 No.4
기존 필라멘트 방식의 루미나리에용 조명의 단점을 극복하기 위해 필라멘트를 LED로 바꾸기 위한 연구가 활발하게 진행 중이다. 본 연구는 루미나리에용에 적합한 LED패키지 구조를 만들기 위해 ray tracing simulator를 이용해 다양한 구조를 모델링하고 시뮬레이션을 통해 각 구조에서의 배광분포를 측정하였다. 시뮬레이션 결과, LED 패키지의 내부 반사경의 각을 증가시킬수록 배광분포가 두 개의 피크로 갈라지면서 피크간의 각이 점점 커졌다. 또한 외부 반사경 각이 증가함에 따라 양쪽 피크간의 각이 점점 줄어들다가 $50^{\circ}$를 기준으로 다시 증가하였다. 이러한 결과는 LED에서 발생한 빛이 두 개의 반사경에 의하여 반사되는 각도가 달라짐에 의하여 발생함을 알 수 있었다. Ray tracing simulator를 이용하여 구한 LED 패키지 구조의 조건을 적용하여 루미나리에용 LED패키지를 제작하였고 배광분포 측정기를 이용해 광 특성을 측정하였으며 시뮬레이션의 결과와 유사한 특성을 얻었다. Today's research has been focused on changing the light source from filament to LED for luminarie illumination to overcome the shortcoming of a filament. The purpose of this research is to make an appropriate high power LED package structure for luminarie. We simulated radiation patterns of the various structures by the ray tracing simulator (Light Tools), and also analyzed the radiation patterns using an LED test system (OL770). As we increased an inner reflector angle, the radiation pattern split into two peaks and the angle between two peaks became larger. In addition, when we increased an outer reflector angle, the angle between side peaks gradually decreased, while it increased again when the angle reach $50^{\circ}$. These results could be understood from the ray tracing of the light reflected from two reflectors. We made the high power LED package for luminarie on the condition of the optimized structure which was made by ray tracing simulation results, and we measured the radiation patterns by using an LED test system, and these results were well matched to the simulation results.
학교건축 사용자 참여디자인에 대한 국내 선행연구 동향 분석
조재문,김성래,이학성 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.11
This study extracted and analyzed the contents of 42 papers related to school architecture applying 'user participatory design' published in academic journals from 2017 to 2022. The papers were categorized into 'related projects,' 'research methods', 'research subjects', 'research contents', 'research purpose,' and 'keywords and problems,' which were analyzed separately, to review improvement plans and directions for successfully carrying out participatory design in school architecture. The results are as follows. First, for 'related projects,' studies related to 'Color My School Beautiful Project' and 'School Space Innovation Projects' were investigated the most. Second, 'research methods' were more 'empirical methods.' Third, 'research target' was most often evaluated in 'elementary schools.' Fourth, for 'research content,' the content related to 'design proposal' was surveyed at the highest rate, and for 'research purpose,' the purpose of 'data provision' was surveyed at the highest rate. Fifth, an analysis through 'keywords and limitations' confirmed that research related to environmental improvement was mainly conducted, and limitations, such as 'projects,' 'policies,' 'ordering organization,' and 'processes,' were identified. These results highlighted the matters to be carried out to improve user participation design in school architecture.
조재문,허준영 한국기술교육대학교 2004 論文集 Vol.10 No.2
The powershift transmission have the advantage of easier operation and higher efficiency by using the hydraulic clutch and mechanical power transfer system. It is important to control the engaging pressure and time. The hydraulic control system is used for these controls of the modulator valve, the accumulator, the sump valve and etc. This study has made a simulator for verifying the pressure characteristic of the shuttle powershift transmission and developed a computer simulation model of the hydraulic components and system by using 'AMESim'. As a result, the design parameters which have an effect on the pressure modulation are verified to the spring stiffness of the modulator valve and the volume of the accumulator.