• Title/Summary/Keyword: lab testing

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Parsing simulink mdl file and C# data structure for Testing (Testing을 위한 Simulink mdl파일의 파싱과 C# 자료구조)

  • Choi, Yong-Jae;Choi, Gyeong-Hee;Chung, Gi-Hyeon
    • Proceedings of the Korean Information Science Society Conference
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    • 2010.06b
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    • pp.414-418
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    • 2010
  • 많은 분야에서 사용되는 matlab을 이용한 test방식을 좀 더 유연하고 원하는 기능을 만들어 사용하기 위해 matlab의 데이터 저장 파일인 mdl 파일의 내부 구조를 분석하고 구문 분석기로 파싱하여 실행 가능한 그래프를 나타내는 자료구조를 만든다.

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The estimation of uncertainty in new measuring system used for high-power tests (대전력시험의 새로운 측정시스템에 대한 불확도 평가)

  • Suh, Yoon-Taek;Kim, Maeng-Hyun;Kim, Dae-Won;Kang, Young-Sik
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.540-542
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    • 2003
  • In the high-power tests to be performed on electrical apparatus as circuit-breaker, load switch, fuse, transformers, insulators, cable and so on, the results of tests on these apparatus are extremely important to evaluate the performance of test object. The reliability of the results depends on the reliability of measuring systems used in the laboratories where tests are performed. This paper deals with factors of uncertainty and describes estimation of uncertainty in new measuring system used in high-power testing LAB. 1 in KERI.

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The Performance analysis of cryptography algorithms for vehicle communication (차량통신 보안을 위한 암호화 알고리즘의 성능 분석)

  • Choi, WonSeok;Kim, Young-Jin;Jeong, SeoHyun;Jeong, Joonsi;Lee, Eun-Hyang
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.11a
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    • pp.207-209
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    • 2022
  • 차량용 통신 시스템은 다양한 센서 정보, 제어 정보를 주고받게 되며 자율주행 등 차량 시스템이 고도화됨에 따라 보안성이 중요해지고 있다. 이에 따라 기존 MCU 구조에서 고성능의 ARM 아키텍처를 사용하는 것이 일반화됨에 따라 본 논문에서는 ARM 기반의 시스템에서 다양한 암호화 알고리즘의 속도와 메모리, CPU 리소스 사용량을 비교 분석한다.

Computational Design of Bifurcation: A Case Study of Darundi Khola Hydropower Project

  • Koirala, Ravi;Chitrakar, Sailesh;Neopane, Hari Prasad;Chhetri, Balendra;Thapa, Bhola
    • International Journal of Fluid Machinery and Systems
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    • v.10 no.1
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    • pp.1-8
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    • 2017
  • Bifurcation refers to wye division of penstock to divide the flow symmetrically or unsymmetrically into two units of turbine for maintaining economical, technical and geological substrates. Particularly, water shows irrelevant behavior when there is a sudden change in flow direction, which results into the transition of the static and dynamic behavior of the flow. Hence, special care and design considerations are required both hydraulically and structurally. The transition induced losses and extra stresses are major features to be examined. The research on design and analysis of bifurcation is one of the oldest topics related to R&D of hydro-mechanical components for hydropower plants. As far as the earlier approaches are concerned, the hydraulic designs were performed based on graphical data sheet, head loss considerations and the mechanical analysis through simplified beam approach. In this paper, the multi prospect approach for design of Bifurcation, incorporating the modern day's tools and technology is identified. The hydraulic design of bifurcation is a major function of dynamic characteristics of the flow, which is performed with CFD analysis for minimum losses and better hydraulic performances. Additionally, for the mechanical design, a simplified conventional design method as pre-estimation and Finite Element Method for a relevant result projections were used.

ACOUSTIC EMISSION TESTING OF SPHERICAL PRESSURE VESSEL DURING HYDROTESTS (수압시험중(水壓試驗中)의 구행압력용기(球型壓力容器)에 대(對)한 AE검사(檢査))

  • Chang, Hong-Keun;Lee, Joo-Suk;Cho, Kyung-Shik
    • Journal of the Korean Society for Nondestructive Testing
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    • v.3 no.1
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    • pp.12-18
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    • 1983
  • This paper describes the procedures and results of an acoustic emission testing performed during hydrotest of spherical pressure vessel for propane storage. A computer based multi-channel real time monitoring and source location analysis AET-4900 system was used for AE testing. The vessel was extremely quiet throughout the entire test run and especially 6 to $14.5kg/cm^{2}$, it is normal operating pressure range. After exceeding $14.5kg/cm^{2}$, one of the 20 sections showed the most event in any one section 11 total but there were scattered at different locations. In order to confirm the events seen in horizontal weld line of that section, proof testing was performed with ultrasonics and radiography.

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A study on revision of international standard(IEC62271-105) (퓨즈 부착 고압교류 부하개폐기의 국제규격(IEC62271-105) 개정에 관한 검토)

  • Suh, Yoon-Taek;Rhyou, Hyeong-Kee;Kim, Dae-Won;Yoon, H.D.
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.537-539
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    • 2003
  • 퓨즈 부착 고압 교류부하개폐기(Alternating current switch-fuse combination)는 개폐기와 한류형 퓨즈의 조합으로서 각각의 규격(개폐기는 IEC60265-1, 한류형 퓨즈는 IEC60282-1)에 따른 개발시험을 실시 한 후 휴즈부착 고압교류 부하개폐기의 규격인 IEC62271-105에 따라 개발시험이 이루어진다. 본 논문에서는 최근에 개정된 IEC62271-105의 신구 비교, 시험종류 및 시험방법에 대해서 기술하였다.

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Temperature Distribution Monitoring of Transformer Using IRR-Camera (적외선방사카메라를 이용한 변압기 온도분포 모니터링)

  • 이우선;정찬문;서용진
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07a
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    • pp.459-462
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    • 2002
  • The conventional thermal insulator and power transformer testing is widely used in surface aging measurement of outside insulator because those testing can carry out very short time in Lab testing. Also thermal testing is able to offer the standard judgement of relative degradation level of outside HV machine. There it is very useful method compare to previous conventional thermal testing method and effective Lab testing method. But surface discharges(SD) have very complex characteristics of discharge pattern so it is required estimation research to development of precise analysis method. In recent, the study of IRR-camera is carrying out discover of temperature of power equipment through condition diagnosis and system development of degradation diagnosis. In this study, thermal testing of Power transformer is measured with partial temperature distribution in real time.

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Temperature Distribution Monitoring of Transformer (변압기 온도 변화특성 모니터링)

  • Lee, Woo-Sun;Jung, Chan-Moon;Son, Dong-Min;Seo, Young-Jin;Lim, Jang-Sub
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.08a
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    • pp.69-72
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    • 2002
  • The conventional thermal insulator and power transformer testing is widely used in surface aging measurement of outside insulator because those testing can carry out very short time in Lab testing. Also thermal testing is able to offer the standard judgement of relative degradation level of outside HV machine. There it is very useful method compare to previous conventional thermal testing method and effective Lab testing method. But surface discharges(SD) have very complex characteristics of discharge pattern so it is required estimation research to development of precise analysis method. In recent, the study of IRR-camera is carrying out discover of temperature of power equipment through condition diagnosis and system development of degradation diagnosis. In this study, thermal testing of power transformer is measured with partial temperature distribution in real time.

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A Study on the Development of a 1800KV Testing Chamber for Gas Insulation (가스 절연 시험용 체임버 개발 연구)

  • Cho, Yun-Ok;Choi, Byoung-Joo;Kim, Kwang-Soo
    • Proceedings of the KIEE Conference
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    • 1989.07a
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    • pp.405-408
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    • 1989
  • A 1800KV testing chamber for gas insulation has been developed. To develop the chamber, all parts consisting of the chamber, namely, bushing, main chamber, shield, conductor bus, inspection window, feedthrough, and spacer have been designed based on numerical electric field analysis. This paper presents the detailed design philosophy and methods of the chamber.

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