• Proceedings of the Korean Society of Computer Information Conference
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• 2011.01a
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• pp.299-300
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• 2011

태양에너지를 에너지 공급원으로 하고 LED 램프를 조명용 광원으로 사용하여 적은 전력 소모와 연장된 램프의 수명으로 에너지 소모를 크게 줄이고, 유지 보수 관리 비용을 획기적으로 줄일 수 있는 LED 조명제어시스템을 개발하였다. 점등 회로, 구동회로 등의 최적화된 설계와 구성으로 광 변환 효율을 높여 소형화, 경량화 되도록 하고, 환경 친화적인 조명 광원으로서 효율적인 성능을 얻을 수 있도록 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.824-827
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• 2011

Needs for Smart Grid development are increasing all over the world as a solution to its problem according to depletion of energy resources, climatic and environmental rapidly change and growing demand for electrical power. Especially decentralized power is attracting world's attention. In this mood a new era for a unit scale of decentralized power environment is on its way in building. However there is a problem to have to be solved in the uniformity of power quality because the amount of power generated from renewable energy resources such as wind power and solar light is very sensitive to climate fluctuation. And thus this paper tries to suggest an energy management algorithm on basis of real time monitoring for meteorological data. The proposed EMS model embodies the method for predicting the power generation by monitoring and analyzing the climatic data and controling the efficient power distribution between the renewable energy and the existing power. The ultimate goal of this paper is to provide the technological basis for achieving zero-energy house.

• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.5
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• pp.1067-1074
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• 2024

Various monitoring systems are in operation in large-scale production facilities such as Yeosu Industrial Complex and the power equipment for operating these systems uses protective devices with built-in low-power lithium-ion batteries to cope with poor environments. In this study, a wireless monitoring system was designed and implemented to analyze the usage characteristics of these lithium-ion batteries. By using the system, the temperature and humidity of the protective device including the battery, gas generation due to charging and discharging of the battery within the protective device, and changes in battery characteristics can be monitored wirelessly at all times. Through this system, the stable management and power supply of batteries required for monitoring devices in industrial complexes are provided, thereby contributing to the establishment of an efficient operation and management system for factory production facilities.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.237-239
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• 2021

Failure and malfunction of the unmanned surveillance facility cost can lead to delays occurring until the person in charge arrives at the unmanned surveillance facility, and theft, damage, and information leakage damage caused by intruders. In addition, due to equipment failure and malfunction, additional costs are incurred due to constant inspection by the manager. In this paper, in order to compensate for the malfunction of unmanned facility costs, we propose a system that diagnoses the monitoring facility in real time, displays the contents of the problem, automatically restores the facility power, and informs the person in charge of the situation by text message. The proposed system is a surveillance facility consisting of main facilities such as video equipment (CCTV), sound equipment, floodlights, etc. And SMS server that can send text messages in real time. Through experiments, the effectiveness of the proposed system was verified.

• KSCI Review
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• v.14 no.2
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• pp.117-122
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• 2006

In this paper, we designed and implemented the DCS(Distributed Control System) terminal remote monitoring board for build total unified management system based wireless communication on automatic control system fields. Also, it tested and evaluated for check an usability and performance. The board monitored relay and fuse status at power management room real-time. Therefore, we expected economic effects extend relay life-time that pre-detected errors and prevented relay fault.

• KSCI Review
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• v.15 no.1
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• pp.219-223
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• 2007

이 논문에서는 기존 개발된 일체형의 통합 터미널 보드의 유선방식으로 자동제어시스템에서의 중요 신호에 대한 전체적 통합관리시스템 구축을 위한 DCS터미널 원격 감시 보드를 설계 제작하고 제작된 보드의 동작을 테스트하기 위해 원격감시 프로그램을 구현하여 기능을 평가한다. 구현된 원격감시보드는 전원관리실의 각 릴레이들의 동작상태 및 릴레이와 퓨즈의 이상 유무를 실시간으로 확인이 가능하며 릴레이의 수명을 고려하여 릴레이의 고장을 사전에 예방함으로써 산업분야의 경제적인 효과가 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.777-780
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• 2009

학교의 컴퓨터 실습실 환경에서 컴퓨터들의 교육용 관리, 제어 시스템으로 교육의 질적 성장욕구에 적극적으로 대응하고, 교육환경을 효과적으로 지원하여 보다 관리하기 편리한 실습실 환경을 구축하기 위한 강의지원 시스템을 구현한다. 시스템의 기능으로 학습자의 화면을 실시간으로 모니터링할 수 있어 수업상황을 관리, 감독할 수 있다. 그리고 원격제어를 이용하여 특정 학습자와 1:1 개별학습이 가능하다. 또한, 강사의 실습화면을 학습자 컴퓨터로 전송, 전원제어, 채팅, 실습 컴퓨터 Lock 기능 등이 있다. 이 시스템으로 인한 기대효과로 수업의 집중화, 인적자원의 낭비 최소화, 시간적 자원의 낭비 최소화, 편의성 증대 등을 들 수 있다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.3
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• pp.159-164
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• 2006

Mobile communication with wireless modem can be powerful tool in web-based structural health monitoring system in which power and communication method are crucial points. In this study, the major reasons of side cracks in tunnel lining are studied by FEM analysis. In addition, a web-based monitoring system using mobile communication with wireless modem is applied to the tunnel structure to monitor the long term behavior of the side cracks. The field application shows that CDMA is useful method for structural health monitoring system which installed long distance away.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1251-1252
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• 2007

유류비용의 증가, 환경보존, 기존 에너지원의 분산전원으로서의 신재생에너지에 대한 관심과 연구, 개발, 보급등에 대한 관심이 고조되고 있는 현실에서 신재생에너지원에서 발생되는 출력 및 발전환경에 대한 관리 기법의 중요성은 나날히 증가하고 있다. 본 논문에서는 기존의 신재생에너지 시스템의 관리 현황을 분석하고 새로운 방식을 제안함으로서 신재생에너지에서 출력되는 데이터의 효율적인 관리가 가능하도록 하는 네트워크 통합관리 기능에 대해 논하고자 한다. 본 논문에서는 효율적인 관리 툴의 프로그래밍을 위해 NI사의 LabVIEW S/W를 사용하였으며 각각의 데이터 수집을 위해 DAQ와 측정 트랜듀서를 사용하였다.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.9
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• pp.201-208
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• 2013

In this paper, we studied on improvement for radiated EMI of USB power line of cable. it is made by using wireless video access point system for confirming the phenomenon of radiated EMI from cable. then, we make sure that the limit exceed through the initial measurement of radiated EMI limit criteria in comparison to about 3 [dBuV/m]~15 [dBuV/m]. after that we confirmed the resonance in power line of cable through measurement of s-parameters. so, we confirmed the relation radiated EMI and power line of cable resonance and we reduced radiated EMI in power line of cable through a capacitor and low pass-band filter using the technique of power networks management. in conclusion, we suggested how to reduce power line of cable resonance applied for the improved method. and we confirmed that suggested reduction method is suitable through testing radiated EMI. the result of radiated EMI reduction limit criteria 40[dBuV/m]~47[dBuV/m] in comparison to about 3 [dBuV/m]~20 [dBuV/m].