• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1217-1218
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• 2015

용존 산소 센서는 하천과 연안으로 유입되는 오염원을 측정하는 곳에 사용되고 있다. 상용화되고 있는 용존 산소 센서는 멤브레인의 부유물 점착 및 전해질 변질로 인해 수명이 단축되는 문제점이 있다. 본 연구팀에서는 수명 문제를 해결하기 위해 실시간 연속 측정이 가능한 자동 교체형 초소형 용존 산소 센서를 개발하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1104-1107
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• 2007

본 연구는 디지털 방송망을 관리하기 위해 디지털 장비들을 네트워크로 연결하고 이를 원격으로 제어하여 측정결과를 자동으로 수집하며, 데이터 베이스를 이용하여 이를 관리하며 마이크로소프트사의 엑셀 및 워드와 같은 문서로 보고서를 자동으로 작성하는 통합측정 및 관리 시스템을 개발하고자 한다.

• The Transactions of the Korea Information Processing Society
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• v.5 no.1
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• pp.111-118
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• 1998

The density of fabric is a very important parameter in many fabric production processes. However, in the textile fabrication factories, textile density measurement process has been done inefficiently by handicraft. Thus, exact textile density measurement process is necessary to fabricate high quality textile through weft straighten. In this paper, we propose an automatic textile density measurement system to measure textile density automatically and to improve fabrication efficiency. The proposed system uses cylindrical lens to optically scan the weftl information of the fabric as well as convex lens to enlarge the weft images. The proposed system improves textile quality and provides constant density value to the whole textile range in the high speed fabrication process.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.3
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• pp.74-82
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• 2001

To reduce the maintenance expense and the possibility of electric outage and/or accident, which causes the decrease in stability and reliability of transmission/distribution line, most of all, accurate measurement for the degree of contamination should be preceded. But the conventional method (brush wiping method), which is recommended in IEC 60815, has sow significant problem in the aspect of man power, expense, error, and so forth. In this investigation, we purpose the development of a new type automatic measuring apparatus, which could measure the degree of contamination on the surface of insulator in outdoor condition. To design and evaluate the apparatus, a FLUX 2D is used, and various laboratory tests, artificial contamination tests, were carried to proof the actual performance. With the result of these effort, we can get the meaningful conclusion to develope a new type automatic apparatus for contamination measurement.

• Journal of the Korean Society of Radiology
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• v.14 no.6
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• pp.791-800
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• 2020

Ultrasonography is widely used to evaluate the function of fetal heart, but due to the subjective nature of the test, there are differences in measurement methods for each examiner, and especially the myocardial performance index has no reference index to date. Therefore, in this study, we wanted to analyze pulse Doppler waveforms of normal fetuses and develop an automatic measurement program to make objective measurements. One hundred and thirty-three pregnant women who visited the hospital for prenatal examinations were studied, myocardial performance index was measured after acquiring a pulse doppler image of the left ventricle. As a result, the early, mid and late pregnancy myocardial performance index, measured by the automatic measurement program conducted in this study, was found to increase as pregnancy continued.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.8
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• pp.910-916
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• 2019

This paper describes the system implementation of the heating operation based on spatial distributing and zonal calorie measuring and analyzing of houses to calculate the fair amount of the heating meterage automatically. The heating space is distributed into 4 zones, which the flow rate and calories are checked by one meter respectively. The system is composed of a heating sources, adjuster of thermostat, valve controller, PC converter and total monitering. The returning temperature in the spatial zones is measured for the heating calorie to calculate the zonal calories according to the rooms temperature. The proposed system results in error by 1% or less in comparing with the dedicated experimental equipment, and reduces energy cost by 7% from conventional system. The fair checking system will be enhanced with building energy management system in the future.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.123-124
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• 2000

오존($O_3$)은 이산화질소, 일산화탄소, 휘발성유기화합물 둥을 포함하는 다양한 물질과 광화학반응에 의하여 생성되는 2차적인 오염물질로 사람과 식물에 영향을 미치고 있는 중요한 오염물질로 알려지고 있으며, 국내에서는 이와 관련하여 오존예보제, 경보제 둥을 운영하여 오존에 의한 피해 영향을 줄이고자 노력하고 있다. 현재 오존을 측정할 수 있는 방법은 환경오염공정시험방법과 정부에서 운영하고 있는 대기오염 자동측정망의 오존 측정방법인 자외선광도법(Ultra Violate Photometric Method)으로 구분되어 지고 있으나, 자동측정장비는 매우 고가의 장비이며, 관리를 위하여 전문적인 지식이 요구되고 있고, 측정소의 개수가 매우 부족한 실정이기 때문에 대기중 오존농도의 지역적인 자료와, 실내공기 측정, 그리고 공간적인 분포 해석을 위해서는 다른 측정방법이 요구된다고 하겠다. (중략)

• Proceedings of the KIEE Conference
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• 2000.07c
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• pp.2138-2140
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• 2000

송전선, 변전소, 발전소 등의 전력설비에 있어서 애자장치의 오손은 지락사고나 코로나 유발에 의한 환경장애 등의 원인이 되고 있어 염분에 의한 애자장치의 오손 대책이 설비 관리에 있어서 중요한 부분을 차지하고 있으며, 이를 위해서는 염분 오손도의 측정이 선행되어야 한다. 본 논문에서는 염분 오손도를 상시 자동으로 측정할 수 있는 방법으로서 제안되고 있는 전자식 애자 이용법, 열전 반도체를 이용한 전도도 측정법, Nd:YAG 레이저법, 레이저 광센서와 프리즘을 이용한 염분 오손도 측정법, 정전용량 검출센서를 이용한 염분 오손도 측정법, 백금 전극을 이용한 누설전류 측정법과 같은 염분 오손도 측정법을 소개하고자 한다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.35 no.1
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• pp.9-14
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• 2022

In this study, a smart jack-up system was developed to prevent safety accidents by performing risk analysis when a structure is lifted for maintenance. A quantitative risk analysis program that can analyze the risk using the pairwise comparison matrix analysis method was developed. The risk was analyzed in real-time for the lifting structure by connecting the program with an automatic jack-up system. Displacements were measured by the IR sensor among the components of the automatic jack-up system, and the displacements were provided to the quantitative risk analysis program. To confirm the performance of the smart automatic jack-up system, experiments were conducted on bridge and risk analysis was performed when a superstructure was lifted. A linear variable differential transformer (LVDT) was also installed on the bridge to verify the performance of the smart automatic jack-up system. The maximum displacements were measured using the devices, and the declinations were compared. The performance of the simultaneous operation of the jack-up device was verified by the analysis of variance (ANOVA).

• The KIPS Transactions:PartA
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• v.14A no.2
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• pp.77-84
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• 2007

The intima media thickness(IMT) of the carotid artery from B mode ultrasound images has recently been proposed as the most useful index of individual atherosclerosis and can be used to predict major cardiovascular events. Ultrasonic measurements of the IMT are conventionally obtained by manually tracing interfaces between tissue layers. The drawbacks of this method are the inter and intra observer variability and its inefficiency. In this paper, we present a multiresolution snake method combined with the dynamic programming, which overcomes the various noises and sensitivity to initialization of conventional snake. First, an image pyramid is constructed using the Gaussian pyramid that maintains global edge information with smoothing in the images, and then the boundaries are automatically detected in the lowest resolution level by minimizing a cost function based on dynamic programming. The cost function includes cost terms which are representing image features and geometrical continuity of the vessel interfaces. Since the detected boundaries are selected as initial contour of the snake for the next level, this automated approach solves the problem of the initialization. Moreover, the proposed snake improves the problem of converging th the local minima by defining the external energy based on multiple image features. In this paper, our method has been validated by computing the correlation between manual and automatic measurements. This automated detection method has obtained more accurate and reproducible results than conventional edge detection by considering multiple image features.