• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년 영문 학술대회
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• pp.16-21
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• 2008

Aero-engine, as one kind of rotating machinery with complex structure and high rotating speed, has complicated vibration faults. Therefore, condition monitoring and fault diagnosis system is very important for airplane security. In this paper, a vibration data acquisition and intelligent fault diagnosis system is introduced. First, the vibration data acquisition part is described in detail. This part consists of hardware acquisition modules and software analysis modules which can realize real-time data acquisition and analysis, off-line data analysis, trend analysis, fault simulation and graphical result display. The acquisition vibration data are prepared for the following intelligent fault diagnosis. Secondly, two advanced artificial intelligent(AI) methods, mapping-based and rule-based, are discussed. One is artificial neural network(ANN) which is an ideal tool for aero-engine fault diagnosis and has strong ability to learn complex nonlinear functions. The other is data mining, another AI method, has advantages of discovering knowledge from massive data and automatically extracting diagnostic rules. Thirdly, lots of historical data are used for training the ANN and extracting rules by data mining. Then, real-time data are input into the trained ANN for mapping-based fault diagnosis. At the same time, extracted rules are revised by expert experience and used for rule-based fault diagnosis. From the results of the experiments, the conclusion is obvious that both the two AI methods are effective on aero-engine vibration fault diagnosis, while each of them has its individual quality. The whole system can be developed in local vibration monitoring and real-time fault diagnosis for aero-engine.

• 한국전기전자재료학회논문지
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• 제20권3호
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• pp.281-285
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• 2007

Facilities of electric railway should be maintained only at night and it is necessary to maintain by human power because facilities are installed at a high place. This paper presents the development and application of a real-time data acquisition system for the characteristics measurement of overhead contact wires in electric railway. The system is designed to perform in the telemetry environments that developed to store data by wireless in a live wire state of 25 kV power source. The field test results show that the proposed technique and the developed system can be practically applied to measure characteristics of temperature, displacement, and strain on overhead contact lines.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.748-751
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• 1997

The White Beamline of the Pohang Accelerator Laboratory(PAL) consists of main and second slits, a microprobe system, two ion chambers, a video-microscope, and a Si(Li) detector. These machine components must be controlled remotely through computer system to make user experiments precise and speedy. A real-time computer control system was developed to control and monitor these machine components. A VNIEbus computer with OS-9 real-time operating system was used for low-level data acquisition and control. VME I/O modules were used for step motor control and scaler control. The software has modular structure for maximum performance and easy maintenance. We developed database, I/O driver, and control software. We used PC/Window95 for data logging and operator interface. Visual C++ was used graphical user interface programming. RS232C was used for communication between VME and PC.

• 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.

• 한국음향학회지
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• 제8권5호
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• pp.95-101
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• 1989

일반 DSP들은 새로운 algorithm 및 응용 system의 개발을 위해서 전용 development system 및 simulator가 필수 불가결의 요소이다. 그러나 대부분 development system은 일반화된 내부 구조에 의해 그 유연성에 한계가 존재한다. 본 연구에서는 A/D입력과 D/A출력 data를 저장하는 buffer의 길이를 program에 의해 1 sample 단위부터 최대 2K sample 단위까지 가변할 수 있도록 하고, 이들 buffer도 2중 구조로 하여 연속 신호의 처리가 가능도록 한 DSP평가용 system을 개발하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.17-21
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• 1989

6-DOE simulator system is designed to real-time processing for motion control, data acquisition, image generation and image processing etc.. In this paper, we introduce hardware and software design technologies for distributed processing, event-trapping, system monitoring and time scheduling procedure in 6-DOF simulator system design.

• 대한안전경영과학회지
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• 제8권6호
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• pp.79-90
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• 2006

Recently the construction of the ERP(Enterprise Resource Planning) system becomes accomplished actively from the many enterprises. But the many problems occur in acquisition of production data which is a fundamental data of system. Also to delay the acquisition of the production result is fatal in the efficient business operation. The construction of the POP(Point of Production) system which acquires production data at real time is become accomplished widely, In the POP system it is most important to acquire the production data which is accurate. But the many enterprises drop the competitive power with acquisition of the data which could not be trusted. In this paper, we analyze these causes and present the method which it can improve the reliability of production data. Also we introduce a real application case.

• 한국통신학회논문지
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• 제35권11B호
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• pp.1659-1666
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• 2010

고기동 유도탄들은 다양한 탄내 인터페이스와 빠른 유도 조종 루프를 가진다. 그러므로 Hardware-in-the-Loop(HWIL) 시뮬레이션 제어 시스템은 고성능의 연산기능 및 하드웨어 인터페이스 기능을 가져야 하며, 실시간 운영체제, 임베디드 시스템, 자료 통신, 실시간 하드웨어 제어와 같이 다양한 IT 분야를 융합하여 개발되어야 한다. 이 논문은 고기동 유도탄의 HWIL 시뮬레이션을 수행하기 위한 제어 시스템 설계 기법으로 시스템 하드웨어 구성, 고성능의 다중 프로세서를 사용하기 위한 업무 할당 알고리즘, HWIL 시뮬레이션 실시간 연산 및 제어 기법, 프로세서 통신 기법, 실시간 자료 획득 기법을 제시한다.

• 한국태양에너지학회 논문집
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• 제22권3호
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• pp.67-76
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• 2002

Data-Acquisition systems are widely used in Photovoltaic(PV) system application in order to analyze and optimize the performance of PV systems. In this paper, the development of a computer-based data-acquisition system and its application are described. The proposed Computer-based data-acquisition System consists of a set of sensors for measuring both environmental and electrical parameters. The collected data are first conditioned and then interfaced to PC using a data-acquisition card. The Labview program was used to further process, display on the monitor at real time and store on the hard disk. We designed and installed two stand-alone PV systems to supply different loads, which in this case a Low Pressure Sodium(LPS) 55 [W] lamp and a electrodless 55 [W] lamp. When the proposed data acquisition system is applied on the designed PV systems, Optimized system operation methods are investigated to confirm a stable load availability and extend battery life time.

• 융합정보논문지
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• 제9권1호
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• pp.136-141
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• 2019

본 논문은 Cortex-M4 기반 소형 데이터수집, 융합 및 고속 전송시스템 대해서 기술하였다. 본 논문에서 설계한 데이터 수집 및 전송 시스템은 산업현장에서 발생되는 각종 데이터를 실시간 수집하여 서버 컴퓨터로 직접 자료를 전송할 수 있으며 간단한 필드-프레임을 개발해서 데이터 전송 속도를 향상 시켰다. 또한 각종 센서에서 수집된 여러종류의 데이터를 데이터 수집장치로 쉽게 전달할 수 있도록 디지털 신호 입력부와 아나로그 신호 입력부, 디지털 신호 출력부와 아나로그 신호 출력부가 별도로 구성되도록 설계하였다. 이러한 소형 데이터수집 시스템은 실시간으로 각종 데이터의 수집 및 고속 데이터 전송이 실시되어 산업현장에서 정밀한 제품들의 품질향상에 크게 기여하리라 판단된다.