• 한국인터넷방송통신학회논문지
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• 제20권5호
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• pp.157-162
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• 2020

기존의 태양광발전장치 중에서 반사판을 갖춘 장치는 태양에너지(일사량)를 태양광 모듈 표면에 집중적으로 입사되는 방식이지만 태양광 모듈을 통해 다시 반사되어 손실되는 태양에너지(일사량)는 고려되지 않는 구조로 되어있다. 또한, 태양광 모듈 주위에 반사판을 설치하여 발전량을 높이는 방안이 제시되고 있지만, 이는 다른 태양광 모듈의 음영에 따른 발전 저하에 영향을 주고 있다. 따라서 이러한 문제점을 개선하고자 본 논문에서는 1) 음영에 따른 태양광 모듈의 발전에 영향을 주지 않으면서 2) 태양광 모듈에서 반사되어 손실되는 태양에너지(일사량)를 회전하는 반사판을 이용하여 태양광 모듈에 다시 입사되는 방법을 연구 및 제안한다. 따라서 손실된 태양에너지(일사량)의 무수한 반사 각도에 따른 태양에너지를 재활용할 수 있는 방법을 통해 태양에너지(일사량)에 대한 손실을 최소화, 동일 일사량에 대한 발전량을 최대화하므로 태양광발전장치의 발전량을 증가시킬 수 있다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1996년도 Proceedings International Workshop on New Video Media Technology
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• pp.107-114
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• 1996

This paper describes an information retrieval system which offers real time information about mobile vehicles through the Internet. In order to evaluate the efficiency of solar batteries and feasibility of electric vehicles, four crews of Tokyo Denki University made a round trip through the North American Continent by their handmade solar electric vehicles last summer. In accordance with this project, an information retrieval system which offers the daily drive information through the Internet to the public was constructed. The system configuration and operating results of this system are reported.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권1호
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• pp.413-435
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• 2018

Although the accuracy of handwritten character recognition based on deep networks has been shown to be superior to that of the traditional method, the use of an overly deep network significantly increases time consumption during parameter training. For this reason, this paper took the training time and recognition accuracy into consideration and proposed a novel handwritten character recognition algorithm with newly designed network structure, which is based on an extended nonlinear kernel residual network. This network is a non-extremely deep network, and its main design is as follows:(1) Design of an unsupervised apriori algorithm for intra-class clustering, making the subsequent network training more pertinent; (2) presentation of an intermediate convolution model with a pre-processed width level of 2;(3) presentation of a composite residual structure that designs a multi-level quick link; and (4) addition of a Dropout layer after the parameter optimization. The algorithm shows superior results on MNIST and SVHN dataset, which are two character benchmark recognition datasets, and achieves better recognition accuracy and higher recognition efficiency than other deep structures with the same number of layers.

• International journal of advanced smart convergence
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• 제9권2호
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• pp.123-128
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• 2020

We constructed a cooling system for solar cells using convection phenomena and investigated its cooling performance. The cooling system didn't need any driving power or water resources. The convection cooler manufactured with a right-triangle shape of an air duct was attached to the rear of the solar cell to confirm that cooling was performed using convection phenomena. When the ratio of duct width to attachment surface width was 3:7, and the ratio of entrance height and exit height of duct was 5:1, it showed the best cooling performance. Comparative experiments with solar cells without convection cooler showed that cooling effects from 16.5℃ to 20.9℃ occurred after 40 minutes exposed to the 1300W Xenon lamp condition.

• 한국항공우주학회지
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• 제44권3호
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• pp.240-246
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• 2016

근래 우주 과학 및 연구의 가장 뜨거운 뉴스 또는 성과는 2013년 NASA의 화성 로버인 Curiosity, 2013년 중국의 달 착륙선/로버인 Chang'e 3 호, 2014년 ESA의 67P/Churyumov-Gerasimenko 소행성 탐사선 Rosetta, 그리고 2015년 NASA의 명왕성 탐사선 New Horizons 일 것이다. 이와 같은 장거리 심우주 탐사가 현 기술로 가능하다는 것에 매우 고무될 수밖에 없다. 하지만 이런 놀라운 심우주 항행 기술의 발전에도 불구하고 심우주 데이터 통신 기술 영역은 이렇다 할 변화가 없었다. 이 영역은 큰 변화를 현재까지 거부해 왔으나 최근 들어 지상의 우수한 통신 기술들을 심우주 탐사에 적용하려는 움직임이 관찰되고 있음에 주목할 필요가 있다. 그중에 하나가 본 논문에서 다루려고 하는 태양계 인터넷 기술이다. 본 논문에서 심우주 탐사에 태양계 인터넷이 미치는 영향을 분석하여 발표하고자 한다.

• International Journal of Internet, Broadcasting and Communication
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• 제10권2호
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• pp.7-12
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• 2018

The spread of IoT (Internet of Things) technology that connects objects based on wired / wireless networks is accelerating, and IoT-based smart home technology that constitutes a super connected network connecting sensors and home appliances existing inside and outside the home is getting popular. In addition, demand for alternative energy technologies such as photovoltaic power generation is rapidly increasing due to rapid increase of consumption of energy resources. Recently, small solar power systems for general households as well as large solar power systems for installation in large buildings are being introduced, but they are effectively implemented due to limitations of small solar panels and lack of power management technology. In this paper, we have studied smart home structure and IoT / IoL device discovery algorithm for energy harvesting system based on photovoltaic power generation, It is possible to construct an efficient smart home system for device control.

• International journal of advanced smart convergence
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• 제1권1호
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• pp.52-56
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• 2012

As inexhaustible clean energy, solar energy will be the most ideal green energy in the 21st century. The effective method to convert solar energy into electrical energy is by solar photovoltaic power generation technologies. LED Emitting Diode is a kind of component which can transform electricity into visible light. As the smart current control system for photovoltaic street lights, the proposed system has improved the battery charging and discharging mechanism to extend the lifespan and effectively controls the LED discharge current according to battery charge state and lighting.

• 한국인터넷방송통신학회논문지
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• 제19권4호
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• pp.113-118
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• 2019

태양광 발전소는 전기를 생산하는 시설물로써 화재와 감전 사고의 위험이 설치장소의 다변화로 근무자와 주변인, 시설물에 대한 위험도가 증가하여 안전사고를 예방하고 안전사고 발생에 따른 빠른 대처를 할 수 있는 시스템을 개발이 대두되고 있다. 위와 같은 개발에 필요성을 비추어 볼 때 태양광발전 시스템에서 생산되는 데이터를 취합, 분석하는 기술을 개발하여 발전시스템의 문제를 실시간으로 진단하고 유지/보수할 수 있는 태양광발전 관리시스템을 개발하여야 하고 이를 통해 이용률 증가 및 유지보수 비용이 감소하는 효과를 볼 수 있다. 이를 위해서는 우선적으로 현재의 상태에서 태양광 발전량을 정확히 예측하여, 현 발전상태의 이상 유/무를 진단 및 이상 위치를 파악하여야 하고 이상 위치가 파악되면 경제성이 고려된 모델을 이용하여 수리/교체의 필요성, 시기 등의 정보가 제공되어야 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권5호
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• pp.1761-1777
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• 2021

An image with infrared features and visible details is obtained by processing infrared and visible images. In this paper, a fusion method based on Laplacian pyramid and generative adversarial network is proposed to obtain high quality fusion images, termed as Laplacian-GAN. Firstly, the base and detail layers are obtained by decomposing the source images. Secondly, we utilize the Laplacian pyramid-based method to fuse these base layers to obtain more information of the base layer. Thirdly, the detail part is fused by a generative adversarial network. In addition, generative adversarial network avoids the manual design complicated fusion rules. Finally, the fused base layer and fused detail layer are reconstructed to obtain the fused image. Experimental results demonstrate that the proposed method can obtain state-of-the-art fusion performance in both visual quality and objective assessment. In terms of visual observation, the fusion image obtained by Laplacian-GAN algorithm in this paper is clearer in detail. At the same time, in the six metrics of MI, AG, EI, MS_SSIM, Q_abf and SCD, the algorithm presented in this paper has improved by 0.62%, 7.10%, 14.53%, 12.18%, 34.33% and 12.23%, respectively, compared with the best of the other three algorithms.

• Journal of international Conference on Electrical Machines and Systems
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• 제1권2호
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• pp.111-115
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• 2012

In this paper, a solar energy powered bicycle linked to a wireless sensor network (WSN) which monitors the transfer of solar energy to an electrical energy storage unit and an analysis of its effectiveness is proposed. In order to achieve this goal, a solar-powered bicycle with an attached ZigBee and a far-end wireless network supervisory system is setup. Experimental results prove that our prototype, solar energy powered bicycle, can achieve enough solar energy for charging a two lead-acid battery pack. As a result, the user, through use of a wireless network in the parking period can be kept aware of the data on the amount of immediate solar radiation, the degree of illumination, the ambient temperature, and electrical energy storage capacity information of the bicycle through an internet interface.