• Title/Summary/Keyword: RF 동력

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IT 신성장동력산업과 RF 기술의 연구동향

  • 장병준;이문규
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.15 no.2
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    • pp.105-115
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    • 2004
  • 최근 정부에서는 차세대 10대 성장산업을 발굴, 새로운 산업 동력으로 삼겠다는 의지를 대내외적으로 천명했다. 이에 발맞추어 정통부 역시 IT 신성장 동력 세부추진계획으로 '브로드밴드 IT 코리아 추진 전략'을 마련, 10대 차세대 성장산업 육성을 적극 뒷받침하려고 하고 있다. 현재 정보통신연구진흥원을 중심으로 세부실천계획을 세우고 있으며, 산업체들도 이에 적극 동참하고 있다. 정통부의 IT 신성장동력의 핵심은 언제 어디서나 통신, 방송, 인터넷 서비스를 이용할 수 있는 유비쿼터스 환경을 만들려는 것이다. 이는 무선기술, 특히 RE 기술이 핵심이므로 향후 RF기술은 IT 신성장동력의 중심 기술이 될 전망이다. 따라서 현 시점에서 IT 신성장동력에서의 RF 기술의 역할과 미래 등을 살펴보는 것이 필요하리라 판단된다. 따라서 본 고에서는 IT 신성장동력의 주요 품목을 고찰하고 각각의 품목에서 요구하는 핵심 RF기술에 대하여 고찰하여 향후 RF기술의 발전 방향을 논하고자 한다.

A fully UHF-powered smart sensor tag in food freshness monitoring (음식물 신선도 모니터링을 위한 풀 패시브 UHF 스마트 센서 태그)

  • Lam, Binh Minh;Chung, Wan-Young
    • Journal of the Institute of Convergence Signal Processing
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    • v.19 no.3
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    • pp.89-96
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    • 2018
  • This study aims to develop a fully passive smart sensing tag utilizing RF (Radio Frequency) energy harvesting technology at UHF (Ultra High Frequency) band of 915MHz. To optimize the power collected under various radiated conditions, an efficient energy harvesting module exploiting a boost circuit with maximum power point tracking (MPPT) is employed. Specifically, the proposed tag features two orthogonal antennas to enhance its capability of both energy scavenging and data transmissions. The experimental result shows that the developed smart sensor tag can scavenge an RF input power of as low as 0.19mW at a distance of 4 meters for a 3.6Vdc output. Furthermore, the proposed smart sensor tag performs the feasibility of completely autonomous monitoring food freshness at 2 meters with a low-power sensor array.

A Construction of Wireless Home Automation System with Low Cost and High Efficiency (저비용, 고효율의 무선가정자동화 시스템 구축방향 연구)

  • 신경철;오용선
    • Proceedings of the Korea Contents Association Conference
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    • 2004.05a
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    • pp.357-364
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    • 2004
  • Government is supporting development of home networking. But, this new system is much expensive to introduce in the home. And limit for establishment is so many in the home. Therefore, in this paper, Present direction of home automation system that can have high effciency into low expense, induction of automation system is easied in the home. Also, install can be easy and do remote control in PC, HP, PDA because use RF, DB.

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An Energy Consumption Prediction Model for Smart Factory Using Data Mining Algorithms (데이터 마이닝 기반 스마트 공장 에너지 소모 예측 모델)

  • Sathishkumar, VE;Lee, Myeongbae;Lim, Jonghyun;Kim, Yubin;Shin, Changsun;Park, Jangwoo;Cho, Yongyun
    • KIPS Transactions on Software and Data Engineering
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    • v.9 no.5
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    • pp.153-160
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    • 2020
  • Energy Consumption Predictions for Industries has a prominent role to play in the energy management and control system as dynamic and seasonal changes are occurring in energy demand and supply. This paper introduces and explores the steel industry's predictive models of energy consumption. The data used includes lagging and leading reactive power lagging and leading current variable, emission of carbon dioxide (tCO2) and load type. Four statistical models are trained and tested in the test set: (a) Linear Regression (LR), (b) Radial Kernel Support Vector Machine (SVM RBF), (c) Gradient Boosting Machine (GBM), and (d) Random Forest (RF). Root Mean Squared Error (RMSE), Mean Absolute Error (MAE) and Mean Absolute Percentage Error (MAPE) are used for calculating regression model predictive performance. When using all the predictors, the best model RF can provide RMSE value 7.33 in the test set.

Forming Analysis for Optimization of 18 Stage Roll Forming Process (18단 롤포밍 공정의 최적화를 위한 롤포밍 성형해석)

  • Jung, Dong-Won;Park, Sang-Hu;Jeong, Ji-Hyun
    • Journal of Power System Engineering
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    • v.17 no.3
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    • pp.65-71
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    • 2013
  • The under rail slide is the latest device to make accurate rectilinear reciprocating motion. In these day, 3-point type is used mostly for the products requiring high strength and performance such as refrigerator door guide or furniture drawer guide. However, It is all imported from foreign countries due to lack of the roll forming technique to make 3-point type under rail slide in domestic. Therefore, design and manufacturing technology for the 3-point type under rail slide are need to development through systematic study. In this paper, to make center member of 3-point ball-type under rail slide for the refrigerator doors, the roll forming modeling and simulation are performed using Shape-RF software. Tensile test is performed about SCP-1 1/2H for determine the mechanical properties of materials. Interference between the roll and the final shape are predicted from the results of the simulation ; this result show that the desirable performance and usefulness of the designed roll forming process.

A study on wireless power generation for marine information acquisition using EAP actuator (EAP 액추에이터를 이용한 해양 정보 취득용 무선 전원 발생에 관한 연구)

  • Jeong, Eun-A;Lee, Kee-Yoon;Jeong, Hwang-Hun;Yun, So-Nam
    • Journal of Power System Engineering
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    • v.15 no.5
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    • pp.49-53
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    • 2011
  • This study concerns about wireless power generation that uses the energy harvester with EAP actuator. The UWSN(Underwater Wireless Sensor Network) has been considered many times by many researches. Because the information of underwater is getting important to secure the resource or to predict the meteorological phenomena. But the sensor node in the UWSN is driven by the acoustic wave to communicate with other sensor node. And this acoustic wave usually spends a 100 times energy than the RF(Radio Frequency) wave due to transfermation medium(sea water). Therefore the power source of the sensor node is very important that is needed to improve in the UWSN. For this purpose, the energy harvester is made by the acrylic elastomer in this study. And the electrode is modified with an aluminum impurity to improve the efficiency of energy harvester. After that, the modified energy harvester is experimented to confirm the improvement of the energy efficiency.

VLC-based ESL system design for interference avoidance in 2.4GHz ISM band (2.4GHz ISM 대역의 간섭회피를 위한 VLC 기반 ESL 시스템 설계)

  • Lee, Sang-gwon;Oh, Chang-heon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.05a
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    • pp.636-637
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    • 2018
  • The electronic shelf label(ESL) system based on wireless communication can reduce waste of disposable paper, reduce labor force and update real time information. However, the environment in which a large number of ESL modules are installed is exposed to interference from radio frequency(RF) communications in the Industry-Science-Medical(ISM) band. In this paper, we propose an ESL system based on visible light communication to avoid congestion of ESL system using ISM band. In the proposed system, the goods information and ID transmitted from the administrator server are transmitted in the ESL Tag, and the ESL Tag identifies the ID and displays the product information. Experiments show that ESL system using visible light communication is possible.

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Study on Construction of IoT environments oneM2M standards utilizing the KETI Mobius platform and LoRa (KETI의 Mobius플랫폼과 LoRa를 활용한 oneM2M규격의 IoT 환경 구축에 관한 연구)

  • Lee, So-Haeng;Song, Bub-Sung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.10a
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    • pp.285-289
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    • 2016
  • In recent domestic new growth model based on the IoT it has been proposed by the industry and national authorities. As applied to these Internet-based IoT convergence center of the field is expected to be realized, including the improvement and increase of efficiency of various economic values. In this paper, using KETI ( Korea Electronics Technology Institute ) developed distribution being oneM2M standards-based platform from Mobius and Gateway Platforms & Cube, and low power, capable of long-range RF communication LoRa communication module is proposed to build the site applicable environment.

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