• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2006년도 정기 학술대회 논문집
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• pp.127-132
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• 2006

Recently, several displacement measuring instruments such a GPS are substantially developed by development of an artificial satellite. Considering this trend, in future displacement measurement will be a very efficiency method, therefore we need to develop structure maintenance & management by using displacement measuring instruments. In this study, I suggest to maintenance & management method about simple beams and cantilever beams which are very important structurein civil engineering by using displacements. I suggest a system which trace behavior of beams by combining some measurement points and a specific displacement function and research that tl1e proper number of measurement and optimum measurement points to efficiently use the system.

• 한국철도학회논문집
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• 제9권6호
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• pp.671-676
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• 2006

A measurement system was developed in this study. It conducts on-line testing and evaluation of tilting train express(TTX). The measurement system is installed in each train for the performance measurement during the test run. It is composed of software part, hardware part and can measure various signals such as vehicle velocity, catenary voltage, motor temperature. The software controls the hardware of the measurement system, performs the analysis and calculation of measurement data and acts as interface between users and the system hardware. The hardware is consisted of 7 DAMs(Data Acquisition Modules) and 6 monitoring modules.

• 한국정밀공학회지
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• 제27권3호
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• pp.27-32
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• 2010

The OMM(On-Machine-Measurement) system has many advantages compare to conventional measurement in the way the time and cost. But, the sensor suitable to OMM system is restrictive use. Touch trigger probe sensor has long time for measurement and non-contact sensor has directional demerit. Because the long mechanical parts such as gear and lead screw for pump, injector and machine tools has big and heavy, unclamp and transferring for measurement in machining process is very difficult. This paper presents a development of ultra miniature eddy current displacement sensor with 3 axes for On-Machine-Measurement system. The accuracy of the sensor is experimentally proved in the grinding machine. In experimental results, the accuracy has under ${\pm}5\;{\mu}m$.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권10호
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• pp.457-464
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• 2005

Both ratio error and phase angle error in potential transformer(PT) are critically affected by used burden, connected in parallel to the secondary terminal of the PT. Thus precise measurement of burden value is very important for the evaluation of PT An automatic measurement system has been developed for the measurement of burden value and power factor of a burden. The ac voltage, current and power of the burden are measured precisely, and the burden value and power factor were calculated from these measured values. The resistance and inductance values of the tested burden are also calculated. The overall measurement uncertainties are calculated and reported with the burden value and power factor. The best measurement uncertainty for the burden measurement with the developed automatic measurement system was estimated to be 0.5 $\%$.

• 대한화학회지
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• 제67권5호
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• pp.319-332
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• 2023

Guide to the Expression of Uncertainty in Measurement (GUM)가 발간된 1993년부터 측정불확도는 측정학의 핵심 개념으로 여겨져 왔으며 적절한 불확도 평가의 중요성은 꾸준히 높아지고 있다. 하지만 측정불확도의 개념과 GUM에 대해 충분히 정확하고 상세하게 설명하는 국문 자료는 거의 없는 실정이다. 본 총설은 측정불확도 개념과 GUM의 수학적, 역사적, 철학적 배경을 상세하게 설명하며 화학 분야 불확도 평가의 특수성을 논한다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2871-2874
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• 2003

The development of a portable system to be used by diabetes patients and renal discase patients is needed to monitor their urea concentration and their glucose concentration in blood. This paper reports a compound sensor composed of a urea sensor, a glucose sensor and a micro-channel. This paper also reports the development of a portable measurement system to measure the concentrations, display the values, and save the values to be used by doctors.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2006년도 동계 학술대회 논문집
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• pp.124-129
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• 2006

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.74-78
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• 2002

Ultra-Precision CNC polishing system including on-machine measurement system, a corrective polishing algorithm is developed. The unit removal profiles for various polishing tools and analyzed and tested and dwell time distributions and residual errors for a target removal shape are calculated. The corrective polishing algorithm is tested with various workpieces. This result will be used for the software development of the CNC polishing system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 C
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• pp.1744-1746
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• 2003

This paper represents the development of national standard (NS) for lightning impulse (LI) voltage measuring system rated 400 kV. A traceability of the NS to the international standard could be achieved by the intercomparison test with Helsinki University. According to the IEC 60060-2, a measurement uncertainty was assessed. As a result of the tests, a measurement uncertainty and step response characteristics were satisfied with the requisite for NS.

• 한국산학기술학회논문지
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• 제15권4호
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• pp.1844-1849
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• 2014

지금까지 금형의 표면관리를 위해 단순 현미경이나 표면 거칠기 측정기를 이용한 측정방법들은 구조적인 문제로 산업현장에서 적용하는 데 효율성이 떨어진다. 이에 따라 장소에 구별 없이 다양한 크기의 금형 측정과 품질관리 효율성을 높일 수 있는 측정시스템 및 분석시스템은 매우 필요하다. 본 연구는 이와 같은 필요성을 만족시키기 위한 현장맞춤형 이동식 표면측정 시스템 개발을 목표로 수행하였다. 측정시스템은 지지대(Base), 몸체(Body), 광학계(Opticalsystem)등 3부분으로 분리할 수 있도록 기구적으로 설계 및 제작하였다. 측정시스템의 실험결과 표면거칠기는 94.9~99.9%의 정확성을 나타냈으며, 원의 측정 값에 대한 편차는 $2{\mu}m$ 이내로 신뢰성을 확보하였다.