• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2128-2129
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• 2006

Zigbee Alliance에서 표준화 진행 중인 Zigbee Stack을 가진 Zigbee 시스템은 통신매체로 RF(Radio Frequency)를 사용한다. 본 논문에서는 RF를 사용하는 기존의 Zigbee 시스템이 신호감쇄 문제나 주파수 공유로 인한 간섭문제 등에 약한 점을 고려하여 유선통신 매체로서 Power Line을 사용하는 PLC 시스템과의 인터페이스를 제안한다. 제안된 시스템은 Zigbee 시스템과 PLC 시스템간에 UART 인터페이스를 가능하게 함으로써 Zigbee 네트워크의 한계를 극복할 수 있으며 Zigbee 시스템의 적용 범위 및 성능 향상을 기대할 수 있다.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.3
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• pp.288-293
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• 2010

In these information-communication society, the wireless system technologies are increasing to do all things with wireless solution for fast and convenient works. This trend drives ubiquitous solutions which are based on broadband wireless network that gives network connection whenever, everywhere. This paper deals a bookshelf management system using plower line communication and RFID module. This system includes a 900 MHz RFID reader, Passive RFID-Tags, an Atmeg128 microprocessor board attached LED Display Module, and a management PC with GUI Software. This system works well in power line communication, tag reading and LED display, and PC Management Software.

• Journal of Korean Society of Forest Science
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• v.89 no.3
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• pp.405-413
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• 2000

This study was conducted to develop an on-line monitoring system for a forest hydrological environment and its meteorological condition, such as temperature, wind direction and speed, rainfall and water level on V-notch, electrical conductivity(EC), potential of hydrogen(PH) by the motor drive sensor unit and measurement with a single-chip microprocessor as controller. These results are summarized as follows ; 1. The monitoring system consists of a signal process unit, motor drive sensor unit, radio modem unit and power supply. 2. The motor drive sensor unit protects the sensor from swift current or freezing and can constantly maintain fixed water level during measurements. 3. This monitoring system can transfer the data by radio modem. Additionally, this system can monitor hydrological conditions in real time. 4. The hardware was made of several modules with an independent CPU. They can be mounted, removed, repaired and added to. Their function can be changed and expanded. 5. These are the result of an accuracy test, the values of temperature, EC and pH measured within an error range of ${\pm}0.2^{\circ}C$, ${\pm}1{\mu}S$ and ${\pm}0.1pH$ respectively. 6. This monitoring system proved to be able to measure various factors for a forest hydrological environment in various experimental stations.

• Journal of the Economic Geographical Society of Korea
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• v.11 no.3
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• pp.428-441
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• 2008

This article verifies the actual conditions of the Wonju area medical devices cluster for presentation of method for increasing promotion. It examines the general status of companies, reason for location, competitive power and supporting system with a questionnaire survey and in-depth research. The Wonju area has 79 medical device companies. It comprised 9% of total sales and 11% of export sales of korea medical devices in 2007. For enhancement of the Wonju area medical devices ability to accumulate and attract of medical device companies and front-line and back-line industries, the followings is needed, a supply of highly qualified man power, a support base for developing modem technology and information marketing, adequate infrastructure for housing and education system, methodologies for sustaining new business and innovation fund-raising programs and marketing, and provide the highest degree of education for CEO.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.5
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• pp.927-934
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• 2019

Recently, mobile devices have evolved into small computers with various functions according to user requirements. Careful attention must be paid to the design of the power supply network for the stable operation of the application processor (AP), the wireless communication modem, the high performance camera, and the various interfaces of the mobile device to implement various functions of the mobile device. In this paper, we analyzed and verified the method of optimizing the design parameters such as the position, capacity, and number of decoupling capacitors to meet the target impedance required by the driver IC chip to ensure the stability of the power supply network of mobile devices that should be designed as wiring type due to mounting density limitation. The proposed wired power supply network design method can be applied to various applications including high-speed signal transmission line in addition to mobile applications.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.5
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• pp.95-102
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• 2014

In this paper, we propose the high speed PLC-based automatic control system for a smart LED streetlight. The proposed the automatic control system were constructed of a power line modem part and monitoring part, streetlight controller part for the high speed communication frequency band and streetlight ballasts characterization and real-time remote control using a high-speed PLC network, and it was designed to meet to lighting grades conditions of KS road lighting standards. The proposed automatic control system were easy monitoring of the power consumption using PC through to the comparison result of the existing streetlight system. As a result, it was confirmed to the possibility of efficient operation for the real-time monitoring and maintenance by induction of reasonable power consumption through to the LED streetlight state checking and remote-control. In addition, we proved to improvement of expected effects for the power cost savings, the energy efficiency, and streetlight differentiation and advanced.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.2 no.4
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• pp.73-80
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• 2009

In this paper, we implemented the integrated gateway for health care and home network system based on PLC(Power Line Communication) and Zigbee. The designed system is consists of sensors, integrated gateway, Zigbee module and PLC modem. The integrated gateway will transmit the data which is collected by health care sensors to health care control system and control an appliance for comfortable environment to medical facilities. The implemented gateway can support various health care and home network service.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2646-2648
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• 2001

In this paper, the development of Power Line Communication(PLC) device for white goods is presented. The commercial PLC chip-set is used for the modem device of white goods. As a PLC device for white goods, an ARM720 u-controller and a windows CE 3.0 are adopted. UPnP (Universal Plug and Play) that is applied for home network middle ware in implemented system. In addition, application programming and emulator for home appliance are implemented using UPnP standard ver 1.0.

• Proceedings of the KIEE Conference
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• summer
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• pp.325-326
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• 2004

전력선통신(PLC: Power Line Communication)은 기존의 전기선을 이용하여 별도의 전용선 설치 없이 통신이 가능한 기술로서 효율적인 PLC 통신을 위해서는 가장 기본적인 기저대역의 송, 수신부상 의 원활한 데이터 전송이 이루어져야 한다. 본 논문에서는 확산대역방식의 PLC통신시스템의 수신부의 핵심모듈인 정합필터를 HDL(hardware description language)을 이용한 디지털 하드웨어인 에 위한 디지털 하드웨어인 FPGA(Field Programmable Gate Array)클 이용하여 구현하였다. 즉, 본 논문에서는 BPSK(Binary Phase Shift Keying) 변조 및 256칩 확산코드를 이용한 확산변조파형에 대한 디지털 정합필터를 FPGA로 구현하고 상관특성을 확인함으로서 모의실험상의 파형과 구현된 하드웨어상의 상관파형이 일치함을 확인하였다.

• Proceedings of the IEEK Conference
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• 2009.05a
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• pp.279-280
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• 2009

최근 경세성장과 함께 생활수준의 향상으로 인하여 에너지 수요는 매년 증가하고 있으며 그 중에서 하나인 전력수요도 역시 급격히 늘어나고 있는 추세이다. 이와 더불어 투자자원 및 입지확보의 어려움, 환경제약의 문제로 전력 공급의 어려움은 날로 증가되고 있다. 따라서 수요증가를 전력공급 능력의 증진뿐만 아니라 수요관리 측면에서도 필요성이 대두되고 있다. 전력선 통신은 전력선을 매체로 하기 때문에 신규선로의 포설 없이 가전기기 및 정보화 서비스 모뎀들의 네트워크화에 용이할 뿐만 아니라 커버리지 확장에도 뛰어나서 디지털 가전, 원격검침, 전력설비 감시제어, 국가 재난 감시 시스템 등의 기본 통신 방식으로 가장 유력한 기술로써 디지털 가전을 포함한 유비쿼터스 전기설비 네트워크 구성에서 필수적 기술로 채택되고 있기 때문에 지능형 홈 네트워크, 전력IT 부가서비스, 설비감시 네트워크, 유비쿼터스 네트워크 관련 기술에 대한 파급 효과가 매우 크며, 디지털 가전의 기본 통신 방식으로 가장 유력한 기술로써 디지털 가전 구성에서 필수적 기술로 채택되고 있기 때문에 지능형 홈 네트워크 관련 기술에 대한 파급 효과가 매우 크다. 본 연구에서는 전력선통신모뎀을 이용하여 가전기기의 전력 소비를 감지할 수 있는 센서를 내장한 전력선 통신기반의 전력 감시 모듈을 개발하여 실시간 원격 모니터링을 통해 소비전력 패턴을 작성한다. 그리고 전력감시 모듈에 연결된 가전기기의 소비전력 패턴 분석을 통해 전력소비 이상 유무를 감지할 수 있는 알고리즘을 개발, 탑재하여 이상유무를 판단하고 전력소비가 급증할 시 자동으로 전력을 차단하여 화재나 누전의 위험을 방지한다. 이에 본 연구는 전력선통신을 이용하여 전력소비감시 및 이상전력차단에 관한 연구에 관한 것이다.