• 전기학회논문지P
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• 제60권2호
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• pp.94-98
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• 2011

Electrolytic power capacitors today form essential components for virtually any power electronic system such as DC/DC converter or UPS. Frequently, electrolytic capacitors for DC link voltage smoothing are the key components which determine the life cycle of the whole unit and often are responsible for converter breakdown failures. In this paper, ethernet-based remote diagnosis system for DC voltage smoothing capacitor using DSP control board is developed. To estimate the status of the capacitor, the equivalent series resistor(ESR) of the component has to be determined. The ESR detection scheme is based on the determination of the capacitor ripple power losses calculated from DC link voltage/current measurement. Experimental results show the veridity and reliability of the proposed ethernet-based remote on-line capacitor diagnosis system.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.511-515
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• 1996

A remote controlled mobile robot system has been developed and tested to monitor the radiation area in the nuclear power plant. The mobile robot system operates according to car-driving-like commands and is capable of radiation measurement and visual inspection in unmanned situations under radiation. The robot system is equipped with a radiation sensor and two cameras with appropriate illumination set-ups. The camera with auto-focus function and 8-times zoom lens is mounted on the pan/tilt rotational base and the other is mounted on the front panel of the robot system. All commands regarding the motion of the mobile robot and various sensors are given through the monitoring system which is designed to provide an integrated man-machine interface.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2006년도 추계학술발표회
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• pp.71-74
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• 2006

현재 근해어업은 기피 산업으로 어민들은 고령화, 어민의 감소로 인력을 구하기 어렵고 어로활동을 하기 위해서는 일반적으로 2 명 이상이 1조로 작업이 진행된다. 따라서 숙련되지 못한 사람들이 조를 이루어 작업을 할 경우 의사전달에 시차가 생기고 한사람은 배의 조종에 종사하므로 작업의 능률이 떨어진다. 따라서 레저나 소형어선에서 1인이 선박을 조종하면서 작업이나 레저를 즐길 수 있는 선외기의 원격제어 시스템 연구의 필요성이 대두되었다. 본 연구에서는 작업의 효율을 높이고 인력을 절감 할 수 있는 선외기의 원격제어시스템에 관한 연구를 수행하였다. 선외기는 엔진의 회전수, 조타기, 정 역전 및 중립기어가 하나로 시스템으로 구성되어 있다. 소형 선외기에 이 세가지의 제어를 직류 전동기를 이용하여 위치제어와 속도제어를 하였고, 마이크로프로세서를 이용하여 통신과 엔진회전수제어를 프로그램화하여 어민들이 작업을 하면서 동시에 원하는 조종을 할 수 있도록 시스템을 설계 제작하였다. 시운전결과 전속에서 좌우현 조타 성능이 명령대로 잘 움직였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.207-210
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• 2005

This paper describes a design of several ship's emergency lighting system(SELS) that power factor is improved and power is controlled extensively, and techniques to control and monitor this system in remote distance by PC serial communication. The remote monitoring control system is composed of emergency power supply system (EPSS), half bridge(HB)inverter, fluorescent lamp(FL), microprocessor, multi communication interface. EPSS checks the voltage of the emergency backup battery in real time. In case that the voltage of 13[V] or less has been detected for 5[msec] or longer for 3 times in a row, charger circuit is connected for battery charging. Experimental works using proposed system confirm that speedy and stable power to be supplied when main power source cut-off, compared with conventional analog type, and input power up to 35.0[%] by adjusting of pulse frequency of the HB inverter.

• 전기전자학회논문지
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• 제17권3호
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• pp.301-308
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• 2013

본 논문에서는 다중센서 기반의 하이브리드 조명제어 시스템을 제안한다. 제안된 하이브리드 조명제어 시스템은 가로등의 관리 및 제어를 위한 데이터 표시부와 데이터 변환 및 처리부, 게이트웨이의 통신부로 구성하여 설계한다. 데이터는 실시간으로 저장이 가능하도록 DB를 설계하고, 실시간으로 무선 원격제어 및 스케줄을 설정하여 모니터링 할 수 있도록 구현한다. 제안된 하이브리드 조명제어 시스템의 효율성 검증결과, 스마트 기기 및 포터블 PC 등과 연동하여 실시간 모니터링 및 원격 조명제어가 가능하였고, 결과적으로 에너지 절감 및 전기료 감소, 통신비용 감소 효과를 얻을 수 있었다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 춘계학술대회 논문집
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• pp.952-955
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• 2000

Nowadays, Internet is so popular that we can easily access the remote site to search information and to communicate remote site and users. People who want to make a collaborate working environment can use JAVA, CORBA, and other internet programming tools like a Perl/XML. The mechanist are try to make the environment fur collaboration within design/manufacturing, simulation, remote sensing through TCP/IP And many industries and research institutions are working towards the agile manufacturing. This paper describes an internet-based real-Time remote monitoring system. The system consists of a hardware setup and a software interface. The hardware setup consists of a machine and its data acquisition hardware, while the software interface incorporates the data acquisition software, the server program, and the client program. The server program acts as the main interface between the data acquisition system and the internet technology. The client program is to be distributed to the remote users who want to monitor the machining status. The system has been demonstrated and verified for an industrial High-Speed Machine (HSM) especially measuring cutting force and acoustic emission. To share the signal, we make the WWW server and display its value. The system has been found to be highly efficient, reliable and accurate.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.85-90
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• 2005

The advance of mobile and telematics technologies has produced vehicles with various convenient services for drivers. Specifically lots of researches and several technologies have been developed to provide services of a remote vehicle diagnosis and control. The existing and representative product for a vehicle control is a RCS (remote control system), but it has a problem of short control distance and fragile security. In this paper, a telematics terminal embedded with CDMA and GPS is designed, which can be connected to the Internet. It allows a driver with a cellular phone to remotely diagnosis and control a vehicle via wireless network and SMS.

• 대한전기학회논문지:시스템및제어부문D
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• 제51권7호
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• pp.279-285
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• 2002

This Paper deals with the economical equipment control which is used by internet network system at the industrial workplace. If the control devices can be accessed by internet, we can have the developed possibility of work conditions. in this paper, we presented the advanced digital timer which has a communication function to control and observe panel to realize control solution based on internet to be easily applicable at workplace with low cost, and we used RS-485 serial communication module to have parallel expansibility and safety. And, this system was experimented and designed for easy system management and status check from remote station through internet. As the result for experiment, the circuit configuration would be more simplified than the existing, and it is expected that multi connection control and monitoring can be simply implemented with low cost equipment at industrial workplace.

• 천문학논총
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• 제11권1호
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• pp.57-73
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• 1996

As a continuing effort to develop an automatic control system for small telescope, we developed the software for telescope control and CCD observations under DOS operating system. For accurate pointing of the telescope in short amount of time, we modelled the angular speed of the telescope by aquadratic function of time (constant acceleration) for the first 15 second and then linear function of time (zero acceleration) aftwewards. By changing the telescope speed from 'slew' to 'fine' before the telescope reaches the desired position, we could achieve the accuracy of a few arcsecond. The CCD control software was written for model CCD-10 of CCD Technology. This CCD can be used for guiding purposes. We also conducted the study for remote control of the telescope using telephone line. Although it cannot be used for real observations at the present form, we succeded in remotely pointing the telescope to desired direction. As faster communication technologies become widely available, simple observations can be made remotely in the near future. Finally we report some observational results made with the present control system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2613-2616
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• 2003

This paper presents a realization of LonWorks communication based remote monitoring and control system for old-dated Helium Liquefier to be automated in operation and data acquisition. Through Inn nodes, tank level, valve position, gasbag level and temperatures are collected and valve position is adjusted by step motor control. Also, field data acquired can be monitored at a remote site through LAN.