• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.289-292
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• 2008

This paper represents the electric energy saving using light control system. Without Light Control System(LCS), it is very hard to classify the amount of electric energy saving for lighting, since it is determined by the end-user's preference in times. Typical LCS has an fixed algorithm to control each light's intensity by ON/Off Control, Step Control, or Dimming Control. We have studied the electric energy saving effect in a LCS equiped building with natural lighting. The electric power consumption at the peak power consumption time with LCS reduced up to 65% of the non-controled case.

• 전기학회논문지
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• 제63권2호
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• pp.306-312
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• 2014

The ZigBee communication method, which is the most frequently applied to the LED lighting control system, has drawbacks of low-speed and low-capacity, and the communication failure possibility due to environmental influences is on the rise. Therefore, it is important to secure the communication reliability by applying an integrated interface with a wire-wireless dual-network. This paper developed a communication module, which has a platform converging and combining the ZigBee of USN environments with the PLC of power line communication environments, to implement a dualized communication interface system supporting the wire-wireless integrated protocol, and implemented a wire-wireless networking device and a control system software technology. As a result, it was automatically switched into the PLC communication within 4.4 seconds on average when there was an access failure in the ZigBee communication network, so a reliable communication network was built.

• 한국정보통신학회논문지
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• 제9권4호
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• pp.792-797
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• 2005

본 논문에서는 전력선 통신과 조광 기술을 기반으로 에너지 절약과 적정 조도의 제어가 가능한 조명제어 스위치의 개발에 대하여 기술하였다. 개발된 스위치는 범용의 마이크로프로세서와 주변 전자기술을 이용하며, 하나의 마이크로프로세서로 전력선 통신과 조광기능을 구현함으로서 저가격 상용화가 가능하였다. 캐리어 주파수는 전송 데이터 길이와 신호감쇄를 고려하여 250kHz로 설정하였다. 저압선로에서 시제작품에 대한 시험결과, 본 스위치는 전력선의 길이와 부하용량의 변동에 대해 강인하게 동작하는 것을 확인하였다.

• 한국전자통신학회논문지
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• 제13권5호
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• pp.1029-1036
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• 2018

본 논문은 캠퍼스환경에서 에너지 절약을 위해 조명 및 공조기기의 최적제어 시스템 개발에 대한 연구이다. 본 연구를 통해 개발 된 제어 시스템의 경우 모션센서와 영상처리를 통해 출입 인원수 파악과 온/습도에 대한 정보로 조명과 에어컨을 제어한다. 또한 데이터 통합 모니터링과 제어 신호에 따른 명령 수행 기능을 통해 제어한 결과들로 에너지 절약을 가능하도록 하였다.

• 디지털융복합연구
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• 제13권6호
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• pp.267-273
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• 2015

자칫 지루하게 느껴질 수 있는 책꽂이를 사용자의 행위에 의해 색상을 변화 시키며 즐길 수 있는 조명의 기능을 포함한 새로운 개념의 책꽂이로 디자인 하였다. 책꽂이의 조명을 탈착 가능하도록 디자인 하여 조명만을 따로 사용할 수도 있고, 조명 책꽂이는 모듈화 되어 있으며 메인 조명 책꽂이는 MCU(Micro Controller Unit), RGB LED와 컬러센서를 포함하고 있어 조명 책꽂이를 중심으로 아홉 개까지 네 방향으로 확장이 가능하다. 확장 가능한 다수의 조명 책꽂이는 MCU와 컬러센서를 내장하고 있지 않으며 단지 RGB LED만이 설치되어 있고 전원은 메인조명 책꽂이에서 공급 받을 수 있는 배선장치만을 가지고 있다. 메인 조명 책꽂이를 통해 전원과 색상 신호만을 전달 받아 서브 조명 책꽂이들은 조명의 색상을 변화 시킬 수 있다. 또한 사물인터넷의 기능을 포함한다. 본 연구는 이러한 센서를 이용해 책꽂이의 조명을 조절할 수 있는 모듈화된 디자인 제품의 제안이다.

• 전기학회논문지
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• 제62권11호
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• pp.1550-1559
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• 2013

Light emitting diode(LED) lighting has been applied various industry fields because of its high efficiency, low power consumption, long life time, and environment friendly characteristics. Generally, LED lighting needs a driver to maintain constant current. Most popular driver is the switching converter. In the converter, there are several electrolytic capacitors. However the lifespan of the electrolytic capacitor is much shorter than LED. Therefore the lifespan of LED lighting with electrolytic capacitor is decreased. Also, LED lighting needs dimming control because of various needs and energy saving. This paper presents the dimmable single-stage PFC DCM flyback converter without electrolytic capacitor and parallel LC resonant filter for reducing 120[Hz] ripple on the output. The type 2 controller is used to maintain constant current and the analog dimming control is used. The proposed converter is verified through simulation and experimental works.

• 조명전기설비학회논문지
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• 제22권2호
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• pp.42-50
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• 2008

최근 들어 초고층 오피스 건축물의 건설이 크게 증가하고 있는 추세이며, 현재에도 많은 계획안이 추진중이며, 건설될 전망이다. 초고층 건축물은 건축물의 개념을 초월하여 도시의 개념을 지니고 있는데, 그 크기만큼 상당한 양의 에너지를 한 건축물에서 소비하고 있는 것이다. 따라서 초고층 건축물에서 소비되는 에너지를 절약하면 그 만큼 큰 효과를 볼 수 있는데, 공간에 적합하고 효율적인 조명설계와 시스템의 선택은 조명 에너지를 절약하기 위한 기초단계라고 할 수 있다. 본 연구에서는 국내 외 초고층 오피스 건축물의 조명설계 현황을 비교 분석하여 앞으로 건축될 초고층 오피스 건축물의 가이드라인으로 활용할 계획이다.

• Journal of Information Processing Systems
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• 제11권1호
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• pp.125-133
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• 2015

The Remote Device Management (RDM) protocol is used to manage the devices in the lighting control networks. RDM provides bi-directional communications between a controller and many lighting devices over the DMX512-A network. In RDM, using a simple binary search scheme, which is based on the 48-bit unique ID (UID) of each device, discovers the lighting devices. However, the existing binary search scheme tends to require a large delay in the device discovery process. In this paper, we propose a novel partition-based discovery scheme for fast device discovery in RDM. In the proposed scheme, all devices are divided into several partitions as per the device UID, and the controller performs device discovery for each partition by configuring a response timer that each device will use. From numerical simulations, we can see that there is an optimal number of partitions to minimize the device discovery time for a given number of devices in the proposed scheme, and also that the proposed partition-based scheme can reduce the device discovery time, as compared to the existing binary search scheme.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권3호
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• pp.156-160
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• 2006

In whole world consciousness of environment maintenance have increased very quickly for the end of the 20th century. To use and disuse toxic substances have been controled at the field of industry. Also the field of lighting source belong to environmental control. And in the future the control will be strong. In radiational mechanism of fluorescence lamp mercury is the worst environmental problem and root. In the mercury free lighting source system the Xe gas lamp is one type. And the Ne:Xe and Ne:Ar mixed gas lamp improve firing voltage of Xe gas lamp. Purpose of this study is to understand ideal mixing-ratio of Ne:Xe and Ne:Ar gas by electron temperature and electron density for mercury free lamp. Before ICP was designed, basic parameters of plasma, which are electron temperature and electron density, were measured and calculated by single-Langmuir probe. Property of electron temperature and electron density were confirmed by changing ratio of Ne:Xe and Ne:Ar.

• 설비공학논문집
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• 제23권3호
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• pp.231-242
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• 2011

This study examines influences of a daylight dimming control system on the variation of indoor illuminance and lighting energy savings in a small office space. Field measurements and a series of computation were performed for typical types of sky conditions in summer. Results indicate that the daylight illuminance under clear and partly-cloudy sky were close to the target illuminance during a majority of time due to a higher ratio of window to wall. However, the target illuminance was not kept successfully due to the variation of photosensor signals which were strongly influenced by desktop illuminance. The system with partially-shielded conditions succeeded to keep target illuminance under clear sky conditions. The system failed under overcast sky conditions since the electric light output from fixtures caused excessive signals to photosensors due to insufficient daylight on a desktop. Unshielded and fully-shielded conditions were not recommended for effective controls of the systems. The influence of lighting fixtures on photosensors should be minimized to achieve successful lighting controls by daylight dimming systems.