• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1823-1825
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• 2005

In this paper, we propose the system that can monitor and control the camera in the remote place using the PDA. The server PC attached to the PLC(Programmable Logic Controller) acquires the current status(On/Off) of the devices through the RS-232 serial communications. Also, the moving image frames captured from the wireless camera is compressed in the JPEG format and is stored in the server. The PDA, which is connected to the server through wireless internet, receives the data about the status of the devices and controls the devices according to the circumstances of them. Also, it can receive the images from the server simultaneously. So, we can monitor and control the specified area in the remote place using the PDA through the wireless communication.

• 전자공학회논문지CI
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• 제46권6호
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• pp.63-69
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• 2009

인터넷의 탈 중심적, 개방적인 특징과 이동통신의 이동성, 휴대성 그리고 인터넷과 이동통신의 양방향성 이라는 특징 및 장점들의 접목은 우리생활에 무선 인터넷을 탄생하게 하였으며, 생활에 많은 변화를 가져오게 되었다. 그러나 기존 유선상의 웹 기반인 시스템 관리 소프트웨어 솔루션들은 시간적, 공간적 제약과 오류사항에 대한 통보가 불확실하거나 신속한 지원요구 및 실시간 긴급조치가 어렵다는 문제점들을 갖는다. 따라서 본 논문에서는 모바일 통신기기(휴대폰, PDA, Smart Phone, Webpad)를 이용하여 원격시스템을 관리 및 모니터링하고 실시간으로 원격지의 시스템을 제어할 수 있는 실시간 무선 원격제어 시스템을 설계 및 구현하였다. 구현된 실시간 무선 원격제어 시스템은 모바일 장비를 이용하여 원격지 서버 관리 기능, 장애 및 이벤트 통보기능, 로그기록 기능, 인증기능 그리고 클라이언트 트랜잭션별 시스템 성능평가 기능 등을 제공한다.

• 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.

• 융합신호처리학회논문지
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• 제22권2호
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• pp.64-70
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• 2021

최근 무선 네트워크 기반 실시간 원격제어에 대한 관심이 크게 증가하고 있다. 무선 네트워크를 통하여 실시간 원격 제어를 구현하는데 있어서, 중요한 요소들 중 하나가 실시간 제어메시지의 지연시간 성능이다. 특히, 주기적으로 송신되는 실시간 제어메시지의 안정적인 수신을 위해 지연시간 지터를 줄이는 기술이 필요하다. 본 논문에서는 실시간 제어메시지를 무선 네트워크에서 운용 하는데 있어서 지연시간 지터를 감소시키는 동기화 전송을 제안한다. 제안된 동기화 전송은 송신노드와 무선통신기 간의 동기화를 바탕으로 적절한 전송시점을 제어하여 실시간 제어메시지가 항상 정해진 시간에 무선 네트워크를 통하여 전송 되도록 한다. 군용무인차량 시스템을 이용한 실험 결과에 따르면, 제안된 동기화 전송은 지연시간 지터를 일반 전송 방식의 지연시간 지터의 32% 수준으로 감소시켰다.

• 전기학회논문지P
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• 제57권4호
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• pp.349-355
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• 2008

In this paper, a wireless remote monitoring system for leakage current of distribution board is developed. In the developed system, signals of the leakage current of distribution board are transmitted to a monitoring system using wireless communication. The developed system is consisted of a comparative module, control module, a wireless communication module, and hand held terminal. The developed system has any facilities which can check a leakage current with real time, send to the user this fact using a wireless remote interface method. And also developed system can take precaution for an accident by leakage current.

• 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.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.743-746
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• 1998

In this paper, we developed an outdoor augmented reality system which has remote real scences acquisition ability. The real scenes acquisition system consists of image acquisition system, tracking system, wireless data transceiver and power supply. Tracking system that consists of Tans Vector and RT-20 measures a position and attitude of the CCD camera that attached at the remote control helicopter. Wireless data transceiver system is utilized for data transmission of remote system that of attitude, position information, andreal scenes data that acquired by the CCD camera. Maximum propelling power of remote control helicopter is 15Kg, so we used 7.2V li-ion cell as a power supply for system minimize. As the results of experiment, the developing system presented application possibility of remote information acquisition system such as construction simulation & estimation, broadcasting, tour guide.

• 한국정보통신학회논문지
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• 제7권7호
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• pp.1434-1441
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• 2003

인터넷의 이용과 범용화에 있어서 기술적인 발전은 로봇의 원격 제어 범위와 실시간 감시 체계에 대한 몇몇 제약을 극복해 왔다 하지만, 원격 로봇과 통신하는 로봇 제어 시스템은 무선 랜이나 블루투스를 네트워크 매체로 이용하기 때문에 제어용 프로토콜이 존재하는 내장형 시스템이나 초소형 실시간 운영체제를 탑재할 수 있는 하드웨어를 필요로 한다. 본 논문에서는 무선 모뎀용 프로토콜과 이를 설치한 서버 시스템을 설계 구현한다. 또한 이 서버를 통해 원격 제어 로봇을 제어할 수 있는 클라이언트 시스템도 구현하여 제시한 프로토콜과 구현된 서버/클라이언트 시스템이 인터넷 기반의 소규모 원격제어 시스템에 적합함을 확인한다.

• 한국정보시스템학회지:정보시스템연구
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• 제17권1호
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• pp.155-171
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• 2008

This thesis proposed a method that connecting step motor to image send board which can acquire image to move and remote controlling via streaming image board of PDA(personal digital assistant) based on embedded Linux which is using wireless network There are three embedded Linux system to embody movable image send board. First, though the wireless network a signal of PDA is transmitted to the board which has embedded Linux and a system which is controlled by the expansion I/O port of the board. Second, it's a system streaming realtime image at a PDA which has embedded Linux. The last is a system which controls a process of image board using TCP/IP communication and image send board at PC. These are the system which can use industrial settings and homes. It can also make use of an embodiment method about travelling image robot.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.917-920
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• 2006

It is possible to make a practical application for many services by using Home Networking. It's brings much improve the quality of our life. Remote control communication should be made by Home Network but present networks are generally using wireless Internet. But, this method don't use exist home and not install wireless internet. Because It need to many devices. Therefore, in this paper we implement gas valve remote control system using RPM(Radio Packet Modem). We can easily installing systems and operating. This system provide different solution for Home networking.