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2023 Vol.33, Issue 1 Preview Page

Research Article

Multimetric Measurement Data Monitoring System Using Sigmoid Function

시그모이드 함수를 이용한 다중 계측데이터 모니터링 시스템

Jeong-Ho Song1
,
Jun-Woo Shin2
,
Heui-Soo Han3*
송 정호1
,
신 준우2
,
한 희수3*
1Master Student, Department of Civil Engineering, Kumoh Institute of Technology
2Ph.D. Student, Department of Civil Engineering, Kumoh Institute of Technology
3Professor, Department of Civil Engineering, Kumoh Institute of Technology
1금오공과대학교 토목공학과 석사과정
2금오공과대학교 토목공학과 박사과정
3금오공과대학교 토목공학과 교수
*Corresponding Author
31 March 2023. pp. 137-149
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Abstract

In order to intuitively grasp the earth pressure direction acting on the structure and displacement state, displacement data in the horizontal and vertical directions were processed using the sigmoid function. A displacement coordinate system was set up for each axis. The system can intuitively check the current displacement and assess the management stage of each point. A displacement path can be compiled from continuously recorded points, allowing trends in the displacement’s history and stress direction to be known. Analysis of data measured for excavated ground, found that displacement occurred in the direction of destressing at all points, and that the points’ management state steady. Similar behavior trends were found among measurement points with high spatial correlation, whereas differing behavior trends occurred among measurement points with low spatial correlation. If the correlation analysis of the precursor and behavior area is performed using the continuously distributed surface settlement data and displacement coordinate system, it will be possible to predict the failure time and area.

Keywords
measurement data
monitoring system
sigmoid function
displacement coordinate system
displacement path

구조물에 작용하는 토압의 방향과 장기변위상태변화를 직관적으로 파악하기 위해 수평, 수직방향의 변위 데이터를 시그모이드 함수를 이용하여 가공하고 각각 좌표계의 한 축으로 하여 변위좌표계 시스템을 설정하였다. 이러한 변위좌표계에 변위상태(압축 또는 팽창) 구분영역과 관리단계 구분영역 설정하여 각 계측지점의 변위상태와 관리단계를 직관적으로 확인할 수 있었다. 관측점을 연속적으로 나타내어 변위경로를 나타내었으며, 변위경로를 통해 변위이력, 변위추세, 지반에 작용하는 응력방향 등을 알 수 있었다. 흙막이 가시설의 실계측데이터 분석 결과 모든 계측지점에서 응력해방 방향으로 변위가 일어났으며, 정상관리상태에 위치하였다. 또한 공간적 상관성이 높은 계측지점 간 거동은 비슷한 거동추세를 보였으며, 공간적 상관성이 낮은 계측지점 간에는 상이한 거동 추세를 보였다. 공간적으로 연속되어 분포하는 지표침하데이터를 변위좌표계를 이용하여 전조현상과 거동영역에 대한 상관성 분석을 수행하면 파괴시간, 영역 예측이 가능 할 것으로 판단된다.

키워드
계측데이터
모니터링 시스템
시그모이드 함수
변위 좌표계
변위 경로
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 33
  • No :1
  • Pages :137-149
  • Received Date : 2022-12-13
  • Revised Date : 2023-01-12
  • Accepted Date : 2023-01-31
  • DOI :https://doi.org/10.9720/kseg.2023.1.137
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