• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1596-1601
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• 2003

As the internet communication is prevalent in recent years, it becomes quite possible to monitor and control some mechanical plants from the remote place through the TCP/IP communication. Such a concept is expected to be applied to many industrial systems for easy maintenance and trouble shooting as well as various kinds of expensive test equipments for sharing. In this research, remote data monitoring and speed control for a DC-motor is implemented and tested through TCP/IP communication with embedded micro-controllers. It showed the possibility of reliable remote control system design utilizing the internet communication.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.196-201
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• 2005

Diseases in the gastro-intestinal tract are on an increasing trend. In order to diagnose a patient, various signals of the digestive organ, such as temperature, pH, and pressure, can offer the helpful information. Among the above mentioned signals, we choose the pressure variation as a monitoring signal. The variation of a pressure signal of the gastro-intestinal tract can offer the information of a digestive trouble or some clues of the diseases. In this paper, a pressure monitoring system for the digestive organs of a living pig is presented. This is why a pig's gastro-intestinal tract is very similar as human's. This system concept is to transmit the measured biomedical signals from a transmitter in a living pig to a wireless receiver that is positioned out of body. The integrated solution includes the swallow type pressure capsule and the receiving set consisting of a receiver, decoder circuit. The merit of the proposed system is that the monitoring system can supply the precise and a durable characteristic to measure and to transmit a signal in the gastro-intestinal tract. We achieved the pressure tracings in digestive organs and verified the validity of system after several in-vivo tests using the pressure monitoring system. Through various experiments, we found each organ has its own characterized pressure fluctuation.

• 대한전기학회논문지:시스템및제어부문D
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• 제54권9호
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• pp.556-558
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• 2005

The effect of high irradiation on inspection systems in a nuclear power plant can be severe, especially to electronic components such as control hoards. The effect may lead to a critical malfunction or trouble to a underwater robot for inspection and maintenance of nuclear reactor. However, if information on the total accumulated dose on the sensitive parts of the robot is available, a prediction of robot's behavior in radiation environments becomes possible. To know how much radiation the robot has encountered, a dosimeter to measure the total accumulated dose is necessary. This paper describes the development effort of a dual radiation monitoring system using a SiC diode as a dose-rate meter and a p-type power MOSFET as a dose meter. This attempt using two sensors which detect same radiation improves reliability and stability at high intensity radiation detection in nuclear facilities. It uses the concept of diversity and redundancy.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.69.6-69
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• 2001

The SSPA makes the power level of EIRP up to 16W, and compensates for temperature to the SSPA´s maximum stability. The up and the down converters are dually conversed like as individual synthesizers for selecting of independent transmit-receive transponder. The function of the up-converter is to convert the 70MHz IF signal modulated in the indoor unit modem into a 14.0 ∼ 14.5 GHz Ku-band up-link signal to be sent to the antenna. The down-converter converts the 12.25 ∼ 12.75 GHz Ku-band down-link signal or a trouble malfunction of SSPA may be a fatal factor to operation of the whole satellite communication network. Therefore, this study developed the remote monitoring and control program to monitor the SSPA´s status before the problem occurs for stable operation of the system. This software ...

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.504-506
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• 2022

기존의 루프탑 태양광 발전 시스템들은 안전성 문제와 더불어 시스템상의 오류 때문에 주로 고정형 시스템 개발 초점이 맞추어져 있었다. 이에 기존 고정식 루프탑 태양광 발전 기술에 태양광 추적 시스템과 모니터링 시스템을 추가하여 루프탑 설치형 스마트 태양광 발전 시스템을 개발하고자 한다. 이는 태양광 추적시스템 접목, 안전진단 및 대처시스템 접목, 이상진단 및 알람 시스템 접목, 외부기기 제어 및 모니터링 시스템 접목으로 "루프탑 설치형 스마트 태양광 발전시스템" 개발 및 사업화에 활용 계획이다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제8권9호
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• pp.169-178
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• 2018

냉동기는 얼음을 만드는 기계이다. 이를 제조 및 판매하는 회사는 대부분 중소기업으로, 판매 후 사후 관리에 어려움을 겪고 있다. 사후관리의 어려움은 대부분 구매처의 불필요한 고객 서비스 요청에 기인하며, 이 요청은 결국 판매처와 구매처의 불필요한 비용 지출로 이어진다. 하지만 재정적으로 열악한 냉동기 제조 기업은 이 비용을 최대한 줄이고자 한다. 뿐만 아니라, 국외에 냉동기를 판매하고 싶어도 사후 관리 때문에 주저하고 있는 상황이다. 이러한 이유로 냉동기 제조업체는 직접 방문 없이 원격지에서 냉동기의 상태를 확인하고 적절한 조치를 취할 수 있는 시스템을 필요로 하고 있다. 따라서 본 논문에서는 원격지에서 냉동기의 상태를 모니터링하고 필요에 따라 제어할 수 있는 냉동기 원격 제어 및 운전 상태 모니터링 시스템을 구현하였다. 개발된 시스템을 통해, 냉동기 제조업체와 냉동기 구매업체는 냉동기의 상태를 빠르게 파악함으로써 즉각적으로 고장에 대응할 수 있다. 게다가, 판매 후 유지보수 및 관리를 효율적으로 할 수 있어 비용절감에 큰 효과가 있을 것으로 예상된다.

• 대한안전경영과학회지
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• 제16권3호
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• pp.239-248
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• 2014

Most systems used in industrial sites, actually have non-linearity and uncertainty. Therefore there are a lot of difficulties in evaluating conditions of these systems. Generally, the quantitative analysis and expression are found hard because the general public cannot easily make an accurate interpretation on the systems. Thus development of a system that utilizes an expertise from skilled analysts is required. In this research, a real-time sensor signal conditioning system and Fuzzy-expert system have been separately set up into an inference algorithm. So that it ensures a fast, accurate, objective and quantitative operational condition value provided to the manager. Therefore, FE_AFCDM is suggested in this literature, as an effective system for diagnosing the problems related to the air compressor. It can quantify the uncertain and absurd condition to operate the air compressor facilities safely and financially.

• 대한기계학회논문집A
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• 제29권5호
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• pp.639-646
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• 2005

As the internet communication is prevalent in recent years, it becomes quite possible to monitor and control some mechanical plants from the remote place through the TCP/IP communication. Such a concept is expected to be applied to many industrial systems fur easy maintenance and trouble shooting as well as various kinds of expensive test equipments fo. sharing. Synthetic jet actuate.(SJA) is a kind of high-lifting device to prevent flow separation at high angle of attack and its use for flow control has received a great amount of attention. In this research, remote control and data monitoring system for SJA wind tunnel test is implemented by TCP/IP communication with DSP as a embedded web server. From the tests performed with embedded server, it showed the possibility of reliable remote control system design utilizing the internet communication.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2004년도 학술대회 논문집
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• pp.365-370
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• 2004

The integration of intelligent devices, devices-level networks, and software into motor control systems can deliver improved diagnostics, fast warnings for increased system reliability, design flexibility, and simplified wiring. Remote access to motor-control information also affords an opportunity for reduced exposure to hazardous voltage and improved personnel safety during startup and trouble-shooting. This paper presents LonWorks fieldbus networked intelligent induction control system architecture. Experimental bed system with two inverter motor driving system for controlling 1.5kW induction motor is configured for LonWorks networked intelligent motor control. In recent years, MCCs have evolved to include component technologies, such as variable-speed drives, solid-state starters, and electronic overload relays. Integration was accomplished through hardwiring to a programmable logic controller (PLC) or distributed control system (DCS). Devicelevel communication networks brought new possibilities for advanced monitoring, control and diagnostics. This LonWorks network offered the opportunity for greatly simplified wiring, eliminating the bundles of control interwiring and corresponding complex interwiring diagrams. An intelligent MCC connected in device level control network proves users with significant new information for preventing or minimizing downtime. This information includes warnings of abnormal operation, identification of trip causes, automated logging of events, and electronic documentation. In order to show the application of the multi-motors control system, the prototype control system is implemented. This paper is the first step to drive multi-motors with serial communication which can satisfy the real time operation using LonWorks network.

• 한국철도학회논문집
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• 제16권4호
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• pp.241-245
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• 2013

기존 전동차 제어시스템의 경우에는 종합제어장치를 통하여 차량 내의 각종 정보를 운전자 화면에 현시하여 운전자가 차량의 상태를 감시하도록 구성되어 있다. 그러나 차량고장 등과 같이 갑작스런 사고가 발생할 경우에는 운전자가 당황하여 정확한 고장조치를 하기 어려운 것이 현실이다. 또한 제동제어기 및 보조전원장치 등 주요장치들의 제어정보를 분석하기 위하여 차량이 기지에 입고되고 난 후에 유지보수원이 현장에서 일일이 수동으로 데이터를 저장하는 매우 비효율적인 유지보수시스템으로 운영되고 있다. 이러한 점을 개선하기 위해서는 차량 내에 센서통신네트워크 및 감시시스템을 설치하여 차량 내의 모든 정보를 실시간으로 송수신하는 시스템을 구축하여야 한다. 본 연구에서는 이러한 시스템 구축을 위하여 전동차 제어 및 감시시스템의 표준화 방안을 제시함으로써, 이를 통해 차량시스템의 안전성을 향상하고 유지보수를 보다 효율적으로 개선하고자 한다.