• Journal of Korea Ship Safrty Technology Authority
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• s.33
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• pp.32-52
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• 2012

선박의 경사시험에 사용되는 수동식 계측기기는 측정 자체가 사람의 관능에 의존하기 때문에 현장계측자 개인의 경험에 따라 측정 데이타의 신뢰도에 편차가 발생할 개연성이 높다. 그러나 경험치에 의존하지 않고 경사시험의 신뢰성을 담보할 측정방법의 개선이나 개발은 현재까지 없었다. 경사시험 시 정밀한 계측센서를 이용하여 경사각을 계측한다면, 선박의 복원성판정에 정확성을 기할 수 있을 것이다. 따라서 본 연구에서는 전자식 자이로 센서가 내장된 스마트폰(태블릿 PC)을 이용하여 선박의 경사각을 계측하고, 아울러 그에 따른 선박의 경하 상태의 배수량 및 중량중심을 자동으로 계산할 수 있는 앱을 개발하여 선박 복원성판정의 유효성을 검증하였다.

• Tunnel and Underground Space
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• v.17 no.5
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• pp.428-434
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• 2007

Displacement of tunnel face is important issues for the evaluation of tunnel safety. In this study, conventional convergence and displacement data measured from horizontal inclinometer were analyzed to investigate the trend and characteristics of tunnel deformation during construction. Trend of measured displacement agreed with general understanding of tunnel deformation prior to excavation. It shows that displacement measured from horizontal inclinometer can be used to preestimate the total deformation of tunnel.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5115-5122
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• 2013

This paper has studied about the development and application of landslide collapse prediction real-time monitoring system based on USN to detect and measure the collapse of landslide. The rainfall measuring sensor, gap water pressure sensor, indicator displacement measuring sensor, index inclination sensor, water content sensor and image analysis sensor are selected and these are applied on the test bed. Each sensor's operation and performance for reliability verification is tested by the instrument which is installed in the field. As the result, u-IT based real-time landslide monitoring system which is developed by this research for landslide collapse detection could minimize life and property damages because it makes advance evacuation with collapse risk pre-estimate through real-time monitoring on roadside cut and bedrock slopes. This system is based on the results of this study demonstrate the effect escarpment plan are spread throughout.

• Journal of the Korean Association of Geographic Information Studies
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• v.21 no.2
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• pp.107-119
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• 2018

The slope monitoring systems which have been operating at home and abroad were investigated and then the real-time monitoring management system for evacuating inhabitants based on Web-EOC(Emergency Operating Center) was constructed. We tried to analyze realistically and precisely the situation by changing from the existing field-centered management to sensor-centered management that measures coordinates and provides in real-time data of measuring/monitoring sensors installed at a field site and developing related viewer programs. In addition, the 3D based monitoring management system, which has alarm functions in case of emergency and provides information about the evacuation place, was constructed on the base that is able to expand to nationwide fields by using Vworld 3D map. Ten steep slope monitoring sites were registered on Web-EOC slope monitoring management system constructed in the research and then application instances were suggested.

• Tunnel and Underground Space
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• v.23 no.2
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• pp.120-129
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• 2013

It is important to measure the displacement behind and ahead of a tunnel face during construction for evaluating mechanical stability by comparing it to a displacement criteria set by tunnel designers. The 30 m long horizontal inclinometer was installed frontward from the tunnel face and the displacement occurred ahead of a tunnel face during excavation was measured by using it. Tunnel arch settlements behind tunnel face were surveyed using a settlement pins on the arch. So total settlement and longitudinal displacement curve were obtained combining settlement measured by both the horizontal inclinometer ahead of tunnel face and the settlement pins behind the tunnel face.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.4
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• pp.271-274
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• 2013

Inclinometer sensors are widely applied in many fields. Especially in the field of construction of high-rise buildings also measure the horizontal and vertical help has been applied to monitor. Recent micro electro-mechanical system(MEMS) technology with the development of the many sensors have been developed. In this paper, a MEMS inclinometer is based on a MEMS accelerometer. The sensor can measure the angle of inclination using the relationship between static acceleration and gravity acceleration from an accelerometer. From this principle, inclinometer has been developed that has more accurate. The accuracy is proved by the experiment with laser displacement. Results in the experiment express high-accuracy, stability and economics of MEMS inclinometer. In conclusion, wireless MEMS inclinometer sensor is expected to be applicable in the areas of construction and many other industries with accurate and convenient monitoring system.

• The korean journal of orthodontics
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• v.16 no.1
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• pp.7-34
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• 1986

본 연구목적은 여자성인교정을 위한 치료목표를 수립하기 위한 기준을 설정하는데 있다. 이용된 연구자료는 96명의 한국인 TV탈랜트와 영화배우 또는 패션모델중 교합과 안모를 평가하여 선정된 30명의 측모두부X선규격사진이었으며 선정된 표본의 평균연령은 20.16세였다. 연구방법은 측모경조직분석을 위해 Downs분석, Northwestern분석, Steiner분석, Wylie분석, Tweed분석, Dimensional linear분석법이 이용되었고 측모연조직분석을 위해 Holdaway연조직분석법이 적용되었다. 조사된 계측치들은 Apple II 48K system을 이용하여 각항목에 대한 평균치와 표준편차를 산출하였으며 백인, 한국인, 일본인의 기존계측치와 비교하였다. 그 연구결과는 다음과 같다. I. 경조직분석 (1) 본 연구와 백인과의 비교 본 연구에서는 백인에 비해 하악이 후퇴되었고 상${\cdot}$하악절치는 순측경사를 보였다. 또한 하악하연경사가 심했다. (2) 본 연구와 한국인정상성인여자(이 연구)의 계측치 비교 이의 연구계측치에 비해서 상악이 후퇴되어있고 상${\cdot}$하악절치는 설측경사를 보였다. 따라서 본 연구의 안모형태는 이의 한국인정상성인여자에 비해서 직선형안모를 보였다. (3) 본 연구와 일본정상인의 계측치 비교 일본정상인에 비해 하악이 돌출되었고 상${\cdot}$하절치는 설측경사를 보였다. 또한 안모의 상부고경과 하악크기는 일본정상인에 비해 크게 나타났다. II. 연조직분석 연조직분석의 11항목중 H-선에 대한 연조직 subnasal과 하순의 계측치가 Holdaway의 acceptable range를 벗어났다. 그 이유는 본연구에서 하악이 상대적으로 후퇴양상을 보였기 때문이라고 사료된다. 이외항목의 계측치들이 acceptable range내에 있다는 것은 연조직이 경조직의 이동에 따라 움직이고 있음을 의미한다. III. Downs분석, Northwestern분석, Steiner분석, Wylie분석, Tweed분석, Dimensional linear measurements분석을 위한 평균치, 표준편차, Polygon도표를 작성함으로써 한국성인여자교정의 진단과 치료목표를 정하는데 지침이 된다고 사료된다.

• Tunnel and Underground Space
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• v.14 no.4
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• pp.295-303
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• 2004

For the deep underground excavation site with the geological complexity of soft seam and hard rock, the numerical analysis and in-situ measurement on the behaviors of roadway and surrounding rock according to stepwise excavation of the steep soft seam are carried out. The strata behavior is modeled using elasto-plastic FEM considering the empirical failure criteria of Hoek ＆ Brown and the strain-softening model. Hydraulic pressure capsule, MPBX and tape extensometer are installed around the roadway for the in-situ measurement of rock stress and deformation. Despite the complexity of geology and excavation procedure, the elasto-plastic analysis considering the empirical failure criteria of Hoek ＆ Brown and the strain-softening model shows good agreement with the in-situ measurement. Comparison of numerical modeling with in-situ measurement enables to predict the behaviors of the roadway and to obtain design parameters for the excavation and support at depth.

• Journal of the Korean Geotechnical Society
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• v.19 no.6
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• pp.397-406
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• 2003

Several sensor systems are used to estimate the reinforcing effect of stabilizing pile in slopes, and to find a failure surface in slopes effectively. FBG(Fiber Brags Crating) sensor, V/W(Vibrating Wire) sensor and inclinometer have shown a great potentiality to serve real time health monitoring of the reinforcing structures. Field tests and test results have shown great solutions for sensor systems of Smart Structures. The purpose of this research is to seek for the relationships among the slope movement and the reinforcing effect of stabilizing pile, and the strain distribution of stabilizing pile in a active zone by analyzing the data from the in-situ measurement so that the possible failure surface should be well defined based on the relationships. The field test results have shown that the data by FBG sensor are well coincided with those of V/W sensor and inclinometer, and the reinforcing effect of the stabilizing pile is good enough.

• The Journal of Engineering Geology
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• v.22 no.2
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• pp.157-171
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• 2012

The slope design of an open-pit mine must ensure slope stability and economic feasibility. The overall slope angle of the pit is therefore the main factor of concern because of limited support or reinforcement options available in such a setting. This study examines the optimal measurement system for monitoring the behavior of the slope in an open-pit mine using displacement measurement, data analysis, and numerical simulations for a coal mine at Pasir, Indonesia. The area of slope to be managed is extensive and the maximum displacement, as calculated by numerical analysis, is about 3,000 mm. The displacement data, measured by inclinometer and GPS, were analyzed, and the applicability of SSR (slope stability radar) was reviewed in comparison with other monitoring systems.