• Journal of the Korea Society of Computer and Information
• /
• v.11 no.4 s.42
• /
• pp.299-304
• /
• 2006

This paper is for the on-line monitoring and controlling system in which remote central processor execute commands based on data transmitted via radio or cable captured from the industrial or marine environments. By executing the appropriate system commands, many mechanical parts in industrial environments and natural factors such as temperature and humidity are to be under control in the way of normal system condition. In this research, we control the temperature of a hydrochloric acid tank to be within the predetermined range by executing temperature controlling commands issued by remote central computer which decides the appropriate action for the total system based on the received sensor data transmitted via radio and cable media. This type of monitoring and controlling system has the various applications such as the disaster prevention system, ubiquitous embedded system, alarm system, and the USN systems.

• 전기의세계
• /
• v.50 no.10
• /
• pp.3-11
• /
• 2001

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2012.10a
• /
• pp.552-553
• /
• 2012

현재의 발전소 내부에 가동 중인 열교환기 배관 라인의 Clinker Monitoring System은 초고온의 열교환기 내부의 벽면 및 배관라인의 클링커 상태를 감시하는 시스템을 요구하고 있다. 이러한 열교환기 내부의 상태를 감시하기 위하여 초고온에 견딜 수 있고 회전이 가능한 장치를 열교환기 내부에 투입하여 회전 가능한 장치를 통하여 원격으로 영상을 전송하도록 하여 클링커 상태를 영상으로 모니터링 하여 열교환기 내부의 상태를 감시 관찰 분석할 수 있는 시스템을 구성하였다. 본 논문에서는 발전설비의 열교환기 내부의 클링커 상태를 모니터링 할 수 있도록 회전 가능한 렌즈 튜브와 보호용 냉각 시스템을 추가된 통합 모니터링 시스템을 제기하고자 한다.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.1
• /
• pp.51-58
• /
• 2016

As semiconductor technology has developed, device performance has been improved. However, since device structures became smaller, circuit aging due to operational and environmental conditions can be accelerated. Circuit aging causes a performance degradation and eventually a system error. In reliable systems, a failure due to aging might cause a great disaster. Therefore, these systems need a performance degradation prediction function so that they can take action in advance before a failure occurs. This paper presents an on-line circuit performance degradation monitoring scheme for predicting a failure by detecting performance degradation during circuit normal operation. In our proposed scheme, IEEE 1149.1 output boundary scan cells and TAP controller are reused. The experimental result shows that the proposed architecture can monitor the performance degradation during normal operation without stopping the circuit.

• The Bulletin of The Korean Astronomical Society
• /
• v.37 no.2
• /
• pp.153.2-153.2
• /
• 2012

발사체 추진기관은 추진제 및 각종 고압가스류를 엔진으로 공급하는 기능, 지상에서 추진제를 발사체로 충전/배출하는 기능, 저온 산화제를 냉각하기 위한 순환 기능, 추진제 탱크를 가압하는 기능, 지상에서 온보드 밸브를 구동하는 기능, 내부 공간 및 라인 퍼지 기능 등을 수행한다. 이와 같은 기능을 수행하기 위해 발사체에는 타 시스템과는 별도로 추진기관 원격제어 시스템을 구성한다. 제어 시스템은 크게 온보드 시퀀스 및 추진제 탱크 압력 제어, 추진제 및 고압가스 충전/배출 제어, 발사체 기능 확인, 내부 기밀 확인 및 발사 직전까지의 상태 모니터링을 위해 구성한 지상측정시스템(GMS), 비행 중 추진기관 상태를 모니터링하기 위한 텔레메트리시스템(TMS)으로 분류한다. 본 논문에서는 일반적인 발사체 추진기관 운용 및 제어 개념을 제어 기능, 시스템 구성, 작동 원리의 단계로 사례와 함께 제시하였다.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.23 no.3
• /
• pp.205-211
• /
• 2003

Acoustic emission (AE) technique has been applied to not only mechanical property testing but also on-line monitoring of the el)tire structure or a limit zone only. Although several AE devices have already been developed for the on-line monitoring, the price of these systems is very high and it is difficult for the field to apply yet. In this study, wc developed a specially designed PC-based source location system using the A/D board. The source location technique is very important to identify the source, such as crack, leak detection. However, since the AE waveforms obtained from transducers are very difficult to distinguish the defect signals, therefore, it is necessary to consider the signal analyses of the transient waveform. Wavelet Transform (WT) is a powerful tool for processing transient signals with temporally varying spectra that helps to resolve high and low frequency transients components effectively In this study, the analyses of the AE signals are presented by employing the WT analyses. AE results are compared the PC-based source location system using A/D board with the commercial AE system.

• Journal of IKEEE
• /
• v.18 no.2
• /
• pp.179-184
• /
• 2014

In this paper, we have developed a data monitoring system for activation analysis based on fuel heater of diesel cars. The light oil of diesel engine below a constant temperature be changed to the waxing materials of a semisolid status like a paraffin, and then it may not start. In order to evaluate an engine activation performance, we suggest an engine start time with an change between an extremely low temperature and high temperature, a delay time goes with heater resistor and current and pressure. So, we have developed sensor module system that can obtain the operational status data between fuel line and fuel heater, and evaluate the performance of fuel heater through monitoring of a temperature and pressure. Finally, we can gather the temperature and pressure data of this system with mobile terminal, remotely and propose an utility of this system that can find problems of fuel heater through measured data.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.11a
• /
• pp.737-739
• /
• 2008

제안된 시스템은 다가오는 유비쿼터스 시대에 요구되는 기반시스템으로써 가전 및 응용프로그램 제어, 그리고 온·오프라인 커뮤니티 확립 기능을 포함하고 사용자 요구 서비스를 제공한다. 시스템은 기존의 운영체제에서 제공하지 않던 커뮤니티의 정보를 편리하게 제공할 수 있으며 커뮤니티에서의 네트워크를 위한 모니터링 기능 및 관리 기능을 제공한다. 이를 기반으로 다 계층별 관리 및 서비스 기능을 포함한 프로그램 원격지 및 제어, 설치 및 운용을 할 수 있으며 분산처리를 위한 목적의 자원 모니터링 및 제공 서비스까지 할 수 있다. 무엇보다 이러한 기능을 제공할 수 있도록 하는 시스템에 이동 에이전트와 지능형 관리 에이전트 개념을 도입하여 계층의 관리와 서비스 및 서비스 제어에 대한 기능을 위임하고 이를 실행함으로써 원격지 자원을 최대한 활용하고 사용자의 요구에 필요한 서비스 제공할 수 있다.

• The Transactions of the Korean Institute of Electrical Engineers B
• /
• v.50 no.5
• /
• pp.205-213
• /
• 2001

This paper presents a virtual instrumentation(VI) system for LIMs performance on-line monitoring. The VI is designed using the graphical programming language LabVIEW and is capable of performing on-line measurement functions, including data acquisition, display, and analyses in the time and frequency domains, as well as data archiving. To monitor in real time the steady-state and transient electromagnetic thrust of LIMs, the search coil is used for the determination of the flux linkage components, which is then multiplied by the appropriate current components to yield a signal proportional to the electromagnetic thrust. This paper reports the LIM's dynamics measured by the proposed on-line monitoring system.

• Proceedings of the KIEE Conference
• /
• 2002.11d
• /
• pp.160-162
• /
• 2002

This paper presents a virtual instrumentation (VI) system for on-line monitoring the performance of universal motor. The VI is designed using the graphical programming language LabVIEW and is capable of performing real time measurement functions, including data acquisition, display, and analyses in the time and frequency domains, as well as data archiving. The electrical quantities and the mechanical quantities on the performance of universal motor monitored by the proposed system are reported.