• 융합보안논문지
• /
• 제8권1호
• /
• pp.43-48
• /
• 2008

기존에는 Syslog 메시지를 확인하기 위해서는 Telnet에나 Console을 통해 대상 System에 로그인을 하여야 했다. 이는 System의 이상유무를 실시간으로 감시할 수 없는 단점이 있다. 이러한 단점을 해결하기 위해 본 논문에서는 Syslog 실시간 감시 시스템을 설계하였다. 제안된 시스템은 로그인 과정 없이 Syslog 메시지를 실시간 감시하여 System의 이상을 실시간으로 탐지함으로써 적시에 문제를 해결할 수 있다. 본 논문에서 제안된 실시간 모니터링 시스템은 Windows 기반으로 구성되었다.

• 한국CDE학회논문집
• /
• 제5권4호
• /
• pp.327-335
• /
• 2000

The spent fuel rod extracting machine is automatically operated in high radioactive environment, so high reliability of operation is required. In this paper, to enhance the reliability of this machine by providing a close monitoring capability. a real time graphic simulation method is suggested. This method utilizes conventional IGRIP (Interactive Graphics Robot Instruction Program) 3D graphic simulation tool to visualize and simulate the 3D graphic model of this machine. Also, the dedicated protocol is defined for transmission of the operational data of the machine. The real time graphic simulation is realized by developing the socket module between a graphic workstation and a machine control computer through the TCP/IP network and by dividing the 3D graphic simulation GSL(Graphic Simulation Language) program as a small sized sub routine. The suggested method is implemented while automatically operating the rod extracting machine. The result of implementation shows that the real time 3D graphic simulation is well synchronized with the actual machine according to the operational data.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2008년도 추계 학술발표회
• /
• pp.427-435
• /
• 2008

A reliability based slope stability assessment method is proposed and examined considering the variation of matric suction which is measured by a real time slope monitoring system. Mean value first order reliability method and advanced first order reliability method are used to calculate reliability indices of a slope. The applicability of methods is compared by applying them to the range of matric suctions measured by the real-time monitoring system. Sensitivity analysis is also performed to examine the contribution of random variables to the reliability index of slope. Finally, the proposed method is applied to a model slope. The results show that the reliability index of slope can be used for efficient slope management by quantifying the risk of slope in real time.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
• /
• pp.531-532
• /
• 2006

This paper presents the implementation of Real-time data acquisition system for dynamic characteristics of overhead contact wire in electric railway. The reconfigurable field-programmable gate array (FPGA) and LabVIEW graphical development tools have been used to Real-time monitoring system. The results from a field test show that the proposed technique and developed system can be practically applied to measure the assessment quantity or quantities on overhead contact lines for the online real-time process monitoring.

• 한국멀티미디어학회논문지
• /
• 제24권12호
• /
• pp.1682-1692
• /
• 2021

Digital Twin, one of the core technologies of the Fourth Industrial Revolution, is attracting attention as a very suitable technology for disaster monitoring such as fires and earthquakes. In this paper, we implement a system equipped with UWB RTLS(Ultra-Wideband Real Time Location System), real-time remote control, and video streaming, which are element technologies for disaster monitoring digital twin. Since the proposed system structure is based on a cloud server, the actual location of the UWB indoor positioning-based client is transmitted to the user device in real time and stored on the cloud server for statistical and data analysis. In addition, we demonstrate through experiments that outliers occurs when the value of RSSI(Received Signal Strength Indicator) decreases due to communication collisions between UWB Tags, and propose an RSSI outlier correction algorithm to solve this problem.

• 한국멀티미디어학회논문지
• /
• 제25권2호
• /
• pp.325-334
• /
• 2022

Digital twin has the advantages of quality improvement and cost reduction, so it is widely applied to various industries. In this paper, a method to implement the major technologies of digital twin easily and quickly is presented. These include data management and relay servers, real-time monitoring applications including remote control interfaces, and direct connection protocols for video streaming. In addition, an algorithm for controlling a two-wheeled vehicle with a 2D interface is also proposed. The implemented system performs near real-time synchronization between the real environment and the virtual space. The delay time that occurs in remote control of the vehicle in the real environment was compared with the results of applying the proposed delay time reduction method. In addition, in the case of 2D interface-based control, an algorithm that can guarantee the user experience was implemented and applied to the actual environment and verified through experiments.

• 전기학회논문지P
• /
• 제66권4호
• /
• pp.182-187
• /
• 2017

Synchronous generators have been significantly applied in large-scale power plants and its monitoring systems are additionally established to sequentially observe states and outputs. We develop a computer based monitoring device for three-phase synchronous power generators in this paper. First, a test-bed of such generator system is created and then a interface board is constructed to transfer electric signals including the output voltage and the current from generators into a computer system via a data acquisition device. Its RMS(root-mean-square) values are continuously shown on a screen of computer systems and its time-histories graphs are additionally illustrated under a graphic user interface(GUI) mode. Lastly, we carry out real-time experiments using the generator system with the monitoring device to demonstrate its reliability and superiority by comparing results of a generic power analyzer which is well-used in measuring various power systems practically.

• 한국생산제조학회지
• /
• 제7권1호
• /
• pp.69-74
• /
• 1998

In order to monitor the tool wear in milling operation, cutting force is measured as the tool wear increased. The digital signal processing methods are used to detect the tool wear . As AR parameter extract the feature of tool wear , it can be used as input parameter of pattern classifier. The FFT monitor the tool wear exactly , but it can not do real time signal processing. The band energy method can be used to real time monitoring of tool wear ,but int can degrade the exact monitoring.

• 한국인터넷방송통신학회논문지
• /
• 제10권6호
• /
• pp.225-233
• /
• 2010

최근, 스마트 그리드, 스마트 홈 네트워크, 유비쿼터스 컴퓨팅 등의 분야에서 필요한 정보를 수집 및 가공하여 실시간 양방향으로 교환하고, 제어 및 감시하는 스마트 정보 모니터링 기술에 대한 연구를 계속 해 왔다. 본 논문에서는 에너지, U-Farm, 차량정보 및 홈 네트워크에 관한 스마트 정보 모니터링 기술의 응용 제품 및 최근 동향들을 알아본다. 특히, 스마트 그리드의 핵심부분인 스마트 미터와 실시간으로 정보를 교환하는 구글 파워미터, 유비쿼터스 농업을 위한 실시간 모니터링 시스템, 차량상태 정보를 위한 실시간 모니터링 시스템, 저전력, 저가격의 ZigBee 기반 스마트 정보 모니터링 기술 응용 및 관련사례에 대하여 기술한다. 마지막으로 스마트그리드 제주 실증단지 구축현황에 대하여 기술한다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제16권4호
• /
• pp.447-451
• /
• 2010

유비쿼터스 지능공간 모니터링 시스템은 유비쿼터스 지능공간 내에서의 다양한 스마트 객체의 기능, 성능 및 상태를 모니터링하고 분석함으로써 사용자 지수, 서비스의 통합 동작 상황, 서비스의 상태를 판단할 수 있는 정보를 실시간으로 제공해준다. 또한 최적화 및 자기 관리를 통하여 서비스 성능을 향상시킬 수 있는 기능을 제공한다. 이러한 실시간 모니터링 시스템의 적용범위를 확장하기 위해서는 유동적인 대량의 데이터 처리가 필요하다. 본 논문에서는 모니터링 시스템을 구성하는 스마트 객체의 데이터 발생에 따라 유발되는 에이전트들의 부하를 해결하기 위해 부하를 예측하여 미리 분산시키는 기법을 제안한다. 제안된 기법이 적용된 시스템은 실험을 통해 기존의 시스템에 비해 전체 데이터 마감시간 초과율이 매개변수가 1일 경우, 80%이상 감소됨을 보여준다.