• 자동차안전학회지
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• 제10권4호
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• pp.13-24
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• 2018

According to DEKRA (a Germany Certification and Inspection Agency)'s accident rate analysis by vehicle defect factor, as a result of analysis of the causes of accidents by flaws, it was found that braking devices accounted for 41%. Defects in the braking system are closely related to the accident, so it is very important to find faulty brking systems to ensure safety. The EU and USA uses ISO brake tester and the Korea is brake teater is first introduse in Japan for vehicle inspection and maintanance. KOTSA introduce the ISO brake tester in order to promote the advanced standardization of the inspection equipment and inspection tecnology, and examined the detection characteristics and applied it to the improvement direction of the brake tester to secure the driving safety.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 1998년도 제27회 춘계학술대회
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• pp.69-76
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• 1998

A precision wear tester is developed to measure the wear rate of a high friction and high pressurized cylinder. The tester consists of indentor system and optical measuring system. The indentor system has two diamond indentors so that they make indents on the inside of the cylinder by using compressed air system. The X-Y-$\theta$ stage of the measuring system can trace the positions of the indents and can measure the diameters of them. The variation of the diameter of each indent after test is converted into the wear rate.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2001년도 제34회 추계학술대회 개최
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• pp.245-251
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• 2001

A fretting wear tester is developed for experimental study on the fuel fretting problem of light water reactor. The feature of the developed tester is it can simulate the existence of gap between spring and fuel rod as well as different contacting force including the just-contact condition (0 N on the contact). Used are a servo-motor, an eccentric cylinder and lever mechanism for driving system. A spacer grid cell is constituted with four strap segments (each segment has a spring). This fretting wear tester can also be used as a fatigue tester of a spacer grid spring with the frequency of more than 10 Hz. It is required to simulate the frequency of the vibrating fuel rod due to flow-induced vibration in a reactor. In fretting wear test, up to two span-length of a fuel cladding tube can be accommodated. A specimen of cladding tube of one span-length is specially designed, which can be extended for two-span test. For .fatigue test, a device for clamping the spring fixture is installed additionally, Presently, the tester is designed for the condition of air environment and room temperature. The variation of the reciprocal distance is measured to check the stability of input force, which will be exerted to the cladding (for fretting wear. test) and the spring (for fatigue test) specimen.

• 제어로봇시스템학회논문지
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• 제14권6호
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• pp.523-529
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• 2008

In this paper, we proposed mobile LCD module test device on embedded based, when operating the existing LCD, divide flicker clearly in full frame, and configuration so as to support between other CPU interface, MDDI, SPI, 24Bit RGB interface, etc. that is based on a high-speed CPU. In addition, when demand to test about each pixel of LCD, it is possible to change IP design of H/W, FPGA, but proposed system is application possible without other design changing. Proposed system is made smaller and equipped with battery, so secure with mobility for effective test the LCD/OLED module and it is able to test the pattern by the client program, for example exiting picture, mpeg, simple pattern test and test per pixel, scale, rotation, Odd/Even pixel per video, etc. From now on, if integrating with independent test system and it is configured that is able to mutual communication and test, it is expected to reduce consumption of human resources and improve productivity for LCD module test.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 춘계학술대회논문집
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• pp.397-400
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• 2008

A numerical analysis has been performed in this study to predict thermal behaviors of combined weapon systems in a large environmental tester. Also, temperature distributions of the materials of the system have been measured for the experimental conditions. The calculated thermal flow characteristics and the measured temperature distributions of the materials for the weapon systems have been analyzed to prepare for field tests in the environmental tester. The boundary conditions of the analysis are composed of inlet and outlet conditions of the environmental tester with various pressures and the limit of low temperature of -25$^{\circ}$C. The soaking time of the system in the environmental tester has been obtained by developed programs in this study to carry out the experiment in the predicted conditions.

• 한국정보통신학회논문지
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• 제16권12호
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• pp.2808-2814
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• 2012

최근 개발되는 무기체계는 부체계 장비를 여러개 연결하여 임무를 수행하는 장비가 대부분이다. 무기체계를 양산하기위한 시험은 부품시험, 회로카드 조립체 시험, 구성품시험, 체계통합시험을 통해 납품시험을 한다. 생산성 향상이란 사람이 시험하는 부분을 최대한 줄이고, 다양한 회로카드 조립체를 시험하기위한 시험장비의 수를 줄여, 궁극적으로 생산시간을 줄여 단가를 줄이는 효과이다. 지금까지 회로카드 조립체의 시험장비는 여러명의 개발자가 주장비를 개발하여 시험방법 또한 여러가지 방법으로 시험을 하였다. 본 연구는 어떻게 하면 시험간 고려사항인 시험장비의 숫자를 줄이고, 입출력하는 모든 기능을 자동적으로 시험이 가능한가를 연구하였다. 생산성향상을 위한 시험장비의 개발은 체계와 부체계 장비 기능할당과 장비에 요구되는 회로카드 조립체의 기능할당을 기본설계 기간부터 계획적으로 할당해야 시험 종류수를 줄일 수 있고 시험치구 회로카드 조립체의 수를 줄일 수 있다.

• 한국공작기계학회논문집
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• 제13권4호
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• pp.30-36
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• 2004

The development of LD(Laser Diode) tester and its control system based on the graphical programming language(LabVIEW) is addressed. The ill tester is used to check the optic power and the optic spectrum of the LD Chip. The emitter size of LD chip and the diameter of the Detector(optic fiber and photo diode) are very small, therefore the test device needs high accuracy. But each motion part of the test device could not accomplish high accuracy due to the limit of the mechanical performance. So, an image processing with machine vision is proposed to compensate for the error. By adopting our method we can reduce the error of position within $\pm$5$\mu\textrm{m}$.

• 컴퓨터교육학회논문지
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• 제8권6호
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• pp.75-83
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• 2005

본 논문에서는 외국어 학습 영역인 영어 듣기와 말하기 평가를 웹과 VoiceXML 기반 교육 평가 시스템을 이용하여 장소와 시간적 제한을 받지 않고 평가하는 방법을 연구하였다. VoiceXML 기반교육 평가 시스템은 사용자 등록 모듈, 평가 모듈, 평가 결과 모듈로 구성된다. 사용자 등록 모듈은 사용자 이름과 아이디, 비밀번호를 사용자 데이터베이스에 등록하여, 학습자가 평가를 하기 위해 전화를 했을 때 vxml 시나리오에 의해 제공되어지는 음성을 듣고 로그인을 하여 사용자를 확인할 수 있도록 하였다. VoiceXML 기반 전화 평가 시스템에서 출제자는 문제 출제와 평가, 평가 결과를 얻기 위한 시간, 노력을 경감할 수 있으며, 학습자는 언제 어디서나 유무선 전화기를 이용하여 VoiceXML 마크업 언어로 제공되는 시나리오에 의해 대화형 음성으로 제공되는 평가 문항을 듣고 직접 음성으로 평가함으로써 외국어 학습에 대한 효과를 올릴 수 있다.

• 환경위생공학
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• 제12권1호
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• pp.77-83
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• 1997

An experimental research was conducted in order to study the treatment of waste reuse system using the membrane. Cell tester which supplied by Amicon was used to compare the fluxes of various membranes. Specially investigated items in the experiment were carried out by using 5 species of microfiltration membranes as to various MLSS concentrations. From the results, it is recognized from the cell test that 0.2 $\mu $m pore-sized membrane have the most effective performance at 2000mg/L of MLSS, and physical properties of membranes such as strength, deflection, elongation, structure of pore are more important than chemical properties in microfiltration membrane.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 B
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• pp.564-567
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• 1997

Various ropes used at the industrial fields can be used to experiment analyze tension tester development and also as an educational experiment tool. There fore the purpose of this paper is about rope tension tester development satisfying both safety and educational terms.