• 조명전기설비학회논문지
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• 제29권4호
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• pp.18-29
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• 2015

The purposes of this research and development are as follows: first, to provide pleasant driving environments inside tunnels; second, to improve the current illumination environments lacking in diffusion luminance meters to meet tunnel lighting standards; and, third, to reduce the consumption of tunnel lighting energy accounting for approximately 65% of tunnel maintenance costs because of inadequate visual environments and tunnel operations. Further details are listed below. Firstly, an image luminance meter for tunnels that can implement the L20-method which is a tunnel luminance method that follows the international standards of CIE88, which was developed in order to improve and change the existing illumination-based tunnel lighting operation system to a luminance-based system. (The margin of error of below 5% according to the results of a test by an authorized agency and field test). Secondly, early illumination control is possible since the lighting control system that can be operated based on luminance enables interlocking control of the inside and outside of a tunnel using ethernet communication. Thirdly, guidelines for field application of the system are proposed. In addition, the luminance inducers of tunnels are found and the reflexibility of each facility that may reduce luminance of the boundaries is also proposed. Fourthly, as a result of a test bed, power consumption of luminance-based lighting operations decreased by 15.6% compared to illumination-based operations. Applying the feedback controls and maintenance factors of internal/external luminance meters, it reduced by 36.4%. Therefore, we became able to provide a luminance-based lighting operation system that complies with tunnel lighting design standards and provides a visual environment for drivers.

• 한국인터넷방송통신학회논문지
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• 제13권4호
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• pp.47-53
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• 2013

현재 조명의 효율화 및 제어시스템 개선을 통해 에너지절감을 추진한다는 계획을 수립하고 조명자체의 고효율화와 조명제어시스템의 성능 향상을 통해 에너지 절감을 추구하는 노력이 한층 강화될 것으로 보인다. 조명시스템에서 LED를 광원으로 사용할 경우 기존 대비 약 50% 이상의 고효율 조명 구현이 가능하다. 본 논문은 LED 디지털 조명을 제어하기 위해 USN을 활용해 유무선 통신을 지원하는 스마트 디머 와 스마트 스위치를 적용한 LEMS(Lighting Energy Management System)를 개발했다. 이 시스템은 유/무선 네트워킹 장치 및 시스템 S/W를 통해 실내외 조명 및 경관 조명을 포함한 특수 목적 등을 효율적이고 신뢰성 있게 제어 한다. 본 시스템은 LED조명의 Digital System Lighting을 통한 USN 원격통합제어기능 및 에너지 효율성을 증대하여 실내외의 조명에너지 사용량을 최소화 하고, 웹 또는 스위치를 통해 조명 에너지 사용량을 사용자가 측정하여 조명 사용량을 피드백 할 수 있게 하는 참여형 시스템이다.

• 한국산학기술학회논문지
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• 제16권2호
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• pp.1370-1374
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• 2015

보안구역 내의 외곽울타리지역의 경비체제를 인적경비에서 과학화경비로 전환함에 따라 안정된 보안설비의 적정관리를 위한 조명개선이 요구되어진다. 본 논문에서는 효율적인 외곽 감시를 수행할 수 있도록 경비과학화시스템에 적합한 등기구 선정과 균일한 조도환경을 조성하기 위하여 조명설비의 부적절한 적용으로 모니터에 눈부심이 심한 울타리 지역을 선정하여 LED 등의 용량을 변화시키며 등기구의 각도, 등주간의 거리, 등기구의 취부높이 등의 조정에 따른 현장 모의실험으로 감시모니터에 발생하는 눈부심을 해소시키고자 하였다. 또한 모의실험 조건에 따른 CCTV 화면분석과 조도값을 바탕으로 공항 외곽지역과 유사한 조건으로 조명 모델링하고 소비전력이 다른 LED 광원을 이용한 시뮬레이션 실시로 공항 외곽보안설비의 적정운영 위한 조명설계안을 제시하고자 한다.

• Architectural research
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• 제16권3호
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• pp.81-92
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• 2014

This study discusses the features of the lighting and ventilation regulations for residential buildings in Hong Kong. Given the compact built environment and public concerns about the environmental quality of housing, various lighting and ventilation regulations have been enacted in Hong Kong. The application of building regulations on the micro scale and incentive systems on the macro scale are present, and the governments' calls for more active participation of the private sector and use of the building environmental assessment tools were also noted. Unlike South Korea, however, Hong Kong was found to adopt more performance-based standards, consider the external factors of the lighting and ventilation conditions together with the indoor elements, and provide specific design guidelines. Notwithstanding the different climatic conditions and socio-political contexts of Hong Kong and South Korea, these findings provide some policy implications for the South Korean government in its efforts to achieve a healthy environment for high-rise, high-density housing. It is suggested that the South Korean government adopt more on-site measurement methods to reflect the environmental conditions accurately and broaden the scope and scale of the implementation of the lighting and ventilation regulations with more specific, practical planning and design guidelines.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.436-442
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• 2015

In this paper, we develop an indoor localization device which embeds localization information into indoor light-emitting-diodes (LED) lighting systems. The key idea of our device is the use of the newly proposed "bit stuffing method". Through the use of stuff bits, our device is able to measure signal strengths even in transient states, which prohibits interference between lighting signals. The stuff bits also scatter the parts of the signal where the LED is turned on, thus provides quality indoor lighting. Additionally, for the indoor localization system based on RSSI and TDM to be practical, we propose methods for the control of LED lamps and compensation of received signals. The effectiveness of the proposed scheme is validated through experiments with a low-cost implementation including an indoor navigation task.

• 조명전기설비학회논문지
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• 제25권3호
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• pp.7-14
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• 2011

Many countries and researchers in the lighting field have focused on the LED light source as a solution to energy savings and environmental pollution. The LED light source consumes less power, has a long life and is highly economical. It is vibration and shock-resistant, and environment friendly as well. But LED lighting has some problems. In particular, the photobiological safety of LED light sources is emerging as an issue. Ultraviolet radiation from the LED light source emitted directly to the human body over a long period of time is harmful. In this paper, UV radiation from white LED was measured. Finally, the LED light source emits UV radiation, but it is relatively small when compared to others.

• 조명전기설비학회논문지
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• 제27권2호
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• pp.14-21
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• 2013

Today, energy problem has become an important issue, and a development of renewable energy is urgent. In architectural fields, a research of the energy efficient lighting system using renewable energy is in progress. The energy efficient lighting system could be realized by integrating a daylight responsive LED lighting control system and a blind PV system. This system is able to save and generate electric energy. Efficiency of this system depends on control methods of blind PV. As a preliminary research, this research analyzed power generation and inflow of available daylight according to control method of blind PV.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.164-167
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• 2009

It is difficult to measure junction temperature in the LED Module. According to the arrangement control unit and heat sink, temperature distribution is changed in the LED Module. A method of forecasting LED Module thermal resistance is suggested with measuring LED and PCB board temperature.

• 한국도서관정보학회지
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• 제48권4호
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• pp.1-20
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• 2017

공공도서관의 가장 중요한 정체성은 지역주민의 지식정보에 대한 접근과 이용을 보장하는 공공재이다. 이를 정당화하려면 도서관은 최적의 조명환경을 구비해야 한다. 특히 시각을 통한 정보인지 비율이 80% 이상인 점을 감안하면 적정조도를 확보하는데 방점을 두어야 한다. 이에 본 연구는 대구지역 공공도서관을 대상으로 조도수준을 측정 분석하였다. 이를 바탕으로 공간별 조도수준을 제시하고, 적정 조도를 확보 유지하는 방안(국가표준 조도기준(KS A 3011)의 전면개정, 관할주체인 자치단체의 법규에 조명기준 및 공간별 조도범위 설정, 기존 조명기구의 LED로 교체, 조명관리에 대한 감독기능 강화, 운영주체인 도서관의 적정 조도 확보 유지를 위한 기본원칙 수립과 공간별 세부방안 마련, 이용자의 불만사항과 만족도 등에 대한 주기적 조사와 반영)을 제안하였다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2000년도 동계 학술대회 논문집
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• pp.228-233
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• 2000