• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.206-208
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• 2004

A new method to control a remote robot with PDA and wireless network is presented. The needs of remote control systems using a home network environments are increased in these days. To solve the shortage of IP address in network, authorized TCP/IP and unauthorized TCP/IP address are used. The unauthorized TCP/IP is obtained by using MAC Address in the system and Network Layer. The model in the system is similar to Sever&Client in structure. Using this system, it is very easy to combine one network device with other network system. A robot system and PDA are used to show the effectiveness of the control system in home network environments.

• 한국정보통신학회논문지
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• 제13권9호
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• pp.1811-1818
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• 2009

본 논문은 무선통신 트래픽제어에서 데이터의 흐름을 원활하게 유지 향상시키기 위한 연구이다. 통상적인 TCP 윈도우 흐름제어에서 나타났던 다양한 유형의 버스트현상은 양방향 트래픽제어를 통해 제거하거나 완화시킬 수 있다. 현재는 대기열이 주로 최종 시스템에 위치함으로 인해 무선통신 제어채널을 운영하는 동안에 TCP ACK 압축문제가 발생한다. 그러므로 소스 IP 대기열의 주기적인 버스트 특성을 분석함으로써 대기열의 최대값을 예측하여 적용한다. 이와 같은 예측수단을 무선통신 트래픽제어에 적용하여 대칭트래픽을 제어함으로써 처리율이 현저하게 증가되어 성능이 향상됨을 분석한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.116.4-116
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• 2002

$\textbullet$In case of using overhead camera system, mobile robot moves under static working area. $\textbullet$Mobile robot must use onboard camera system to work under wide working area. $\textbullet$Mobile robot must have wireless LAN to remove restriction of movement. $\textbullet$Onboard camera system must have wireless LAN environment. $\textbullet$We develop embedded vision platform using onboard camera.

• Wind and Structures
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• 제31권1호
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• pp.21-29
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• 2020

The wind field measurement of severe winds such as hurricanes (or typhoons), thunderstorm downbursts and other gales is important issue in wind engineering community, both for the construction and health monitoring of the wind-sensitive structures. Although several wireless data transmission systems have been available for the wind field measurement, most of them are not specially designed for the wind data measurement in structural wind engineering. Therefore, the field collection is still dominant in the field of structural wind engineering at present, especially for the measurement of the long-term and high-frequency wind speed data. In this study, for remote wind field measurement, a novel wireless long-term and high-frequency wind data acquisition system with the functions such as remote control and data compression is developed. The system structure and the collector are firstly presented. Subsequently, main functions of the collector are introduced. Also novel functions of the system and the comparison with existing systems are presented. Furthermore, the performance of this system is evaluated. In addition to as the wireless transmission for wind data and hardware integration for the collector, the developed system possesses a few novel features, such as the modification of wind data collection parameters by the remote control, the remarkable data compression before the data wireless transmission and monitoring the data collection by the cell phone application. It can be expected that this system would have wide applications in wind, meteorological and other communities.

• 한국컴퓨터정보학회논문지
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• 제24권1호
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• pp.129-135
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• 2019

This paper is part of research and development for stand-alone solar system without commercial power supply. It implements firmware of controller for operation of stand-alone solar system by applying IoT technology and also develops communication modules that allow multiple solar lamps to send and receive data through wireless network. The controller of the developed stand-alone solar system can effectively charge the power generated by the solar module, taking into account the battery's charge and discharge characteristics. It also has the advantage of attaching wireless communication modules to solar lamp posts to establish wireless communication networks without incurring communication costs. In addition, by establishing IoT gateway middleware platform for each installation site, it forms a foundation to operate multiple solar lamp posts into multiple clusters. And, it is expected that the data collected in each cluster will be used to enable configuration and control of operational information, thereby inducing convenience and efficiency of remote operation and management.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권5호
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• pp.423-443
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• 2009

We present the design and implementation of a unique sensing and actuation application -- the Illuminator: a sensor network-based intelligent light control system for entertainment and media production. Unlike most sensor network applications, which focus on sensing alone, a distinctive aspect of the Illuminator is that it closes the loop from light sensing to lighting control. We describe the Illuminator's design requirements, system architecture, algorithms, implementation and experimental results. The system uses the Illumimote, a multi-modal and high fidelity light sensor module well-suited for wireless sensor networks, to satisfy the high-performance light sensing requirements of entertainment and media production applications. The Illuminator system is a toolset to characterize the illumination profile of a deployed set of fixed position lights, generate desired lighting effects for moving targets (actors, scenic elements, etc.) based on user constraints expressed in a formal language, and to assist in the set up of lights to achieve the same illumination profile in multiple venues. After characterizing deployed lights, the Illuminator computes optimal light settings at run-time to achieve a user-specified actuation profile, using an optimization framework based on a genetic algorithm. Uniquely, it can use deployed sensors to incorporate changing ambient lighting conditions and moving targets into actuation. Experimental results demonstrate that the Illuminator handles various high-level user requirements and generates an optimal light actuation profile. These results suggest that the Illuminator system supports entertainment and media production applications.

• 대한공간정보학회지
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• 제16권1호
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• pp.3-12
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• 2008

본 연구는 LBS를 위한 비주얼 베이직 Active X 컨트롤을 이용한 무선 인터넷 DGPS 구축이다. 시스템 개발에 사용된 DGPS 보정방법은 웹상의 위치 보정방법과 양방향 통신에 있어 편리성을 고려하여 좌표 보정방법을 사용하였다. 위치정보 출력 모듈은 PictureBox 컨트롤과 bitblt 함수를 이용하여 개발하였다. 서버와 클라이언트 간의 인터넷 DGPS 통신 모듈은 MS Comm 컨트롤, MS Winsock 컨트롤(TCP/IP), MS CommonDialog 컨트롤, MS Sysinfo 컨트롤 구성요소를 사용하여 개발하였으며 구축된 시스템을 웹에 게시하였다. 구축된 시스템을 이용하여 실시간 무선 인터넷 DGPS를 수행한 결과, 서버 시스템 상의 클라이언트 추적, 클라이언트 시스템에서의 항법, 제 3 이용자의 클라이언트 추적이 근 실시간 가능하였다.

• 한국콘텐츠학회논문지
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• 제12권10호
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• pp.22-34
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• 2012

본 논문에서는 적외선 무선 센서 노드 및 무인감시카메라를 이용한 축사 관리 시스템을 설계 및 구현한다. 제안하는 축사 관리 시스템은 상시 축사 모니터링, 침입 감지, 전기기기 자동제어 기능을 제공한다. 첫째, 제안하는 시스템은 무인감시카메라를 이용하여 축사와 소의 상태를 24시간 모니터링 할 수 있으며, 적외선 무선 센서 노드를 사용하여 외부 침입자를 감지할 수 있다. 둘째, 전원제어기를 사용하여 축사 내부 전기기기의 전원을 제어할 수 있다. 마지막으로 스마트폰앱 프로그램을 사용하여 이들 컴포넌트를 통합하고, 테스트베드를 통해 제안하는 시스템의 유효성을 검증한다.

• 전력전자학회논문지
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• 제21권3호
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• pp.275-281
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• 2016

A novel bidirectional magnetic wireless communication system is proposed in this study. This system provides the communication capability between the source and load sides by high-frequency signal while wireless power is transferred. Contrary to the conventional wireless communication systems using complex IC circuit and active components, the proposed system is simply composed of passive components. It is practical and beneficial for environmental robustness, cost effectiveness, and simple implementation. The detailed static analysis of the proposed system for power and communication lines is established. The proposed system is experimentally verified, and results show that a 0.1 voltage gain for communication line is obtained while a 2.0 voltage gain for the power line is achieved. The proposed system is adequate for practical applications as it allows the inductive power transfer system to wirelessly and easily communicate between the source and load sides.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2009년도 정보 및 제어 심포지움 논문집
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• pp.45-47
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• 2009

Wireless Sensor Network(WSN) has been very popular in unattended surveillance systems recently. For Applying WSN into Building Automation system(BAS), a novel hierarchial network structure and static routing algorithm which eliminates the scalability limitation of Zigbee are proposed in this paper. The static routing algorithm relying on the hierarchial network address reduces the computational complexity to a great extent and has a real-time performance which satisfies urgent applications well.