• 조명전기설비학회논문지
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• 제29권2호
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• pp.1-7
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• 2015

The Light Emitting Diode(LED) lighting control system proposed in this thesis is made up of a sensor module, a microcontroller, Bluetooth wireless communication, LED Driver, and LED downlight. The sensor module, comprised of an infrared sensor, an illumination sensor, and a temperature sensor, was designed to one Printed Circuit board(PCB). The system is able to identify the environment information collected by the sensor, and make it possible to control lighting automatically and manually through sensors. In addition, depending on users' conditions, a color temperature can be controlled. CS-1000, a spectroradiometer, was employed to measure the changing values of a color temperature in 8 steps. According to a test, it was found that it was possible to change a color temperature from 3187K of Warm White LED to 5598K of Cool White LED. The Bluetooth based wireless communication technique makes it possible to control more lighting devices than other wireless communication techniques does.

• 전기학회논문지P
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• 제66권4호
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• pp.242-246
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• 2017

In this study, it was investigated about optical simulation in high brightness and high uniformity general lighting using glass light guide plate. And we adopt edge-light emission type light plate. Edge-light type lighting has been used LCD application, especially note PC or smart phone backlight unit. Because it had the good properties such as slim shape and light weight. We thought this type was suitable for general lighting application such as wall attached type or ceiling mount type. But many of edge-light type lighting had problems. It called slanted output light rays. That was main key parameter how could control the direction of output light rays. We investigated the solution of this problems, using ray tracing method, we recognized the major fact of the solution relied on the geometric structure of diffusing dot shape. We set the conditions of aspect ratio in diffusing dot shape such as 0.5 to 1. And, at first, we designed diffusing dots shape based on the results of optical simulation and made specimen. as above condition, and acquired good result in confirming dots shape such as the value of the output rays's peak angle was around 75 degrees. And good light distribution characteristics were measured by slated spectro-radiometer. It was shown that the effective ways of designing light distribution characteristics using optical simulation such as ray tracing linear method for making general lighting using glass light guide plate.

• 한국터널지하공간학회 논문집
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• 제9권1호
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• pp.29-36
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• 2007

현대 도로에서 터널의 중요성은 점차 증가하고 있다. 터널을 통과하는 운전자는 터널 외부환경과 내부환경의 차이에서 오는 변화에 많은 어려움을 가지게 된다. 주간에 터널 출구부를 지나는 운전자는 터널 출구의 높은 야외휘도로 인하여 화이트홀 현상을 겪게 되며, 이는 심각한 운전자의 시인도의 감소를 가져오게 된다. 본 논문에서는 운전자가 겪는 화이트홀 현상에 대처하기 위한 방법의 하나인 프로빔조명의 효과를 검정하기 위하여 실제와 유사한 상황을 컴퓨터에 구현하여 시뮬레이션 하였다. 터널의 조명을 설계함에 있어 특정 터널이 가지고 있는 제반 요소들을 고려한 다양한 상황에서의 운전자 시인도를 분석하고 보다 좋은 운전환경을 위한 터널조명을 만들기 위한 노력이 필요하다. 본 연구에서의 시뮬레이션에 의한 분석은 터널조명 초기 설계단계에서 비교적 단기간에 다양한 조명대안들에 대한 비교, 분석을 가능하게 하는 하나의 접근법이 될 것이다.

• 에너지공학
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• 제26권1호
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• pp.34-44
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• 2017

본 연구에서는 2축의 태양추적장치에 프레넬 렌즈를 장착한 fiber-optic 설비형 자연채광시스템의 효율성에 대하여 이론적 분석을 수행하였다. ECOTECT와 RADIANCE를 기반으로 시뮬레이션 모델을 개발하여 다양한 조건하에서 자연채광 시스템뿐만 아니라 형광등을 이용한 인공조명에 대한 실내 조도분석과 함께 실측 데이터와의 비교연구를 수행하였다. 형광등을 이용한 실내조명의 경우, 평균조도는 사무실 실내 조도 기준을(KS A 3011 일반 사무실 [G]등급[300-400-600lux]) 충분히 만족하는 결과를 보여주었다. 한편, 디퓨져를 사용한 자연채광시스템의 경우도 사무실 실내 조도 기준을 넘는 것으로 나타났다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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• pp.2028-2031
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• 2003

This paper proposes a face identification algorithm, robust on lighting condition and complex background. The proposed method estimates facial area under bad light condition by expanding face color boundaries and then finds a lip using the templates for lips. Then the eyes are found using their topological relationship with the long and short axes of lip area. The experimental results have shown that the proposed algorithm is robust on lighting conditions and complex background.

• International Journal of Internet, Broadcasting and Communication
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• 제12권3호
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• pp.116-124
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• 2020

The advantage of the distance learning universities based on the 4th Industrial Revolution is that anyone can conveniently take lectures anytime, anywhere on the web. In addition, research has been actively conducted on the effect of light color and temperature control upon student performance during online classes. However, research on how the conditions of subjects, lighting colors, and music selection improve the degree of a student's concentration during online lectures has not been completed. To solve these problems in this paper, we have developed automatic analysis system SW for the weak subjects of learners by applying intelligent analysis algorithm, have proposed and simulated music therapy and art therapy. Moreover, It proposed in this paper an algorithm for an automatic analysis system, which shows the weak subjects of learners by adopting intelligence analysis algorithms. We also have presented and simulated a music therapy and art therapy algorithms, based on the blended learning, in order to increase students concentration during lecture.

• KIEAE Journal
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• 제13권1호
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• pp.39-45
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• 2013

The daylighting control system has to be applied to prevent the excessive incident daylight and reduce energy use. As the one of the most useful daylighting control systems, the blind system is simple and easy to install on the window for small office buildings. This study aims to evaluate the summer energy performance of small office buildings by venetian blinds and energy saving strategy of ministry of knowledge economy in korea. For the study, the simulations have been executed on blind installation conditions and lighting control methods. As results, the energy loads cut down 22 to 25(%) by using blind energy. Also, the efficient shows high on EMS system and low on $45^{\circ}$ slat angles. Also, using energy saving strategy can reduce about 13(%) energy load.

• 산업공학
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• 제14권2호
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• pp.205-209
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• 2001

The number of tunnel has fast increased with the rapid expansion of highway network. Tunnel should be designed to provide for drivers both safety and pleasant driving conditions. In this perspective, the design for tunnel lightning is very important in order to provide its safety, pleasantness, and cost-efficienty of maintenance, all of which should be considered and analyzed for a better tunnel lighting. This paper attempts to compare the low-pressure sodium lamp, which has usually been used for tunnel lighting, with the fluorescent lamp, which we consider as an alternative for the former. In an effort to determine the number of lamps to meet the required illuminance in the tunnel, this research employs a simulation technique which would allow us to conjecture, with the aid of basic model, the life cycle cost for illumination per each tunnel. This analysis is expected to provide a basic method and related information for tunnel development and design.

• 한국조명전기설비학회지:조명전기설비
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• 제8권1호
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• pp.21-28
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• 1994

기존 상업용빌딩은 실내 시환경 개선의 필요성이 중시됨에 따라서 자연채광과 인공조명을 겸용하는 천장형태에 따른 조명제어 방법으로 전기에너지도 절약하면서 실내의 작업면 조도는 적정조도를 이루게 하는 방안을 찾고자 한다. 이에 본 논문에서는 창 유리의 종류와 실내의 마감색채, 천장타입에 따른 인공조명의 제어방법을 가지고 실험을 하였으며, 실험한 데이터는 실내의 조명설계시 참고할 수 있는 기초적 자료로 제시하고자 했다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.339-344
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• 2005

A person's body resistance in the waterpark, public bath and similar places is lower than any other places due to effect of water. So low voltage may create a shock hazard for the human body in case of leakage or fault currents from lighting unit etc. We researched the related regulations these are internal standards, NEC, IEC and investigated the actual conditions for the prevention of electrical shock due to lighting units in the waterpark, public bath and similar places. So we could present actual facilities's problems and solutions