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비파괴 콘크리트 압축강도 측정용 전자식 타격응답 장치의 신뢰성 평가
최만용 ( Choi Man Yong ),장선재 ( Jang Sun Jae ),박정학 ( Park Jeong Hak ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
This paper describes for reliability evaluation of electronic hammer of the non-destructive for compressive strength measurement of concrete. There is test method for rebound number, it is used most plentifully in safety inspection of the infrastructure. This electronic impact hammer, it solved the problem of schumidt hammer. It acquires the reliability which is excellent existing schumidt hammer compared to. The electronic impact hammer measurement data is acquired from the detection coil the velocity which and a degree of acceleration response waveform, it will be able to measure the compressive strength of the concrete. In this paper described, it is reliability evaluation for accurate measure of the compressive strength of the concrete which it is electronic impact hammer.
영상처리 기법을 이용한 구조물 균열검출시스템의 특성 및 신뢰성 검증
최만용 ( Choi Man-yong ),김수언 ( Kim Su-un ),지기환 ( Jee Kee-hwan ),신성우 ( Shin Sung-woo ),박정학 ( Park Jeong-hak ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
The investigation of concrete structure typically relies on visual inspection which is one of basic inspection technique. Image processing techniques play a crucial role in the growing field of automatic surface inspection technique. However, kinds of inspection equipment, environmental condition and detection algorithm have much influence on the reliability of inspection result. This paper proposes a verification method and testing procedure for the reliability of inspection results and surveys characteristics of image acquisition systems and crack inspection algorithms.
영상처리기법을 이용한 구조물 균열검출시스템의 특성 및 신뢰성 검증
최만용(Choi Man-Yong),김수언(Kim Su-Un),지기환(Jee Kee-Hwan),신성우(Shin Sung-Woo),박정학(Park Jeong-Hak) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
The investigation of concrete structure typically relies on visual inspection which is one of basic inspection technique. Image processing techniques play a crucial role in the growing field of automatic surface inspection technique. However, kinds of inspection equipment, environmental condition and detection algorithm have much influence on the reliability of inspection result. This paper proposes a verification method and testing procedure for the reliability of inspection results and surveys characteristics of image acquisition systems and crack inspection algorithms.
최만용 ( Choi Man-yong ),허광희 ( Heo Gwang-hee ),오세욱 ( Oh Se-wook ),조상래 ( Jo Sang-lae ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
Presently it becomes deeper underground excavation with rapid growth of industrial and gravitation of the population. By purpose of cut-off, impervious, and ground strengthening etc., grouting is used. But it is difficult to check impregnation effect because grouting operate in under ground. Up to this day, many methods of inspection have been designed, but these methods is not trusted. Therefore, the purpose of this study is to confirm to ground improvement effect by using temperature measurement. From the result, the more sensor adjoin impregnation tube, the more temperature increases.
비파괴 콘크리트 압축강도 측정용 전자식 타격응답 장치 개발
최만용 ( Choi Man Yong ),장선재 ( Jang Sun Jae ),박정학 ( Paik Jeong Hak ),박해원 ( Park Hae Won ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
This paper describes for development of electronic impact hammer of the non - destructive for compressive strength measurement of concrete. There is test method for rebound number, it is used most plentifully in safety inspection of the infrastructure. This electronic impact hammer, it solved the problem of schumidt hammer. It acquires the reliability which is excellent existing schumidt hammer compared to. The electronic impact hammer measurement data is acquired from the detection coil the velocity which and a degree of acceleration response waveform, it will be able to measure the compressive strength of the concrete. In this paper described, it is development for accurate measure of the compressive strength of the concrete which it is electronic impact hammer.
최만용 ( Choi Man-yong ),오세욱 ( Oh Se-wook ),허광희 ( Heo Gwang-hee ),박정학 ( Park Jeong-hak ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.1
This study deals with earth pressure acting on CIP wall and displacement of CEP wall with excavation. The primary purpose of this study analysis the earth pressure using displacement and strut axial force by the measured and calculated values with excavation step. Also, through the comparative analysis of measured axial forces with load cells and calculated earth pressure with principle virtual work, it is the purpose of this study to obtain the measurement analysis source that could solve problems for the process of the stage excavation. This paper compares measurement results with analysis results on the earth pressure and displacement of the wall and describes more exact earth pressure and the change of the wall displacement of deep excavation.
최만용 ( Choi Man-yong ),권일범 ( Kwon Il-bum ),김치엽 ( Kim Chi-yeop ) 한국구조물진단유지관리공학회 1997 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.1 No.1
강트러스 교량의 손상발생을 검출하기 위한 기법을 실험실 안에서 연구하기 위하여 실교량을 1/15로 축소한 3차원 강트러스 교량을 제작하고 실험하였다. 강교량의 손상시나리오를 6개로 선정하고 동적 유한요소해석을 수행하여 축소모형 강교량의 동적특성을 해석적으로 검토하였다. 축소 모형 강교량은 8개의 베이(bay)를 갖는 단경간의 복사재로 구성하여 설계하고 제작하였다. 이동하 중차량은 서보모터를 사용하여 140Kg의 최대무게 및 최대속도 4m/sec로 가동할 수 있도록 제작하였다. 이동하중차량에 의한 실험결과 가속도계 신호로부터 주파수 스펙트럼이 손상에 따라 크게 변화하는 것을 확인하였다. 따라서 이러한 동적 특성 검출에 의하여 강교량의 붕괴 이전에 손상을 검출할 수 있도록 상시감시할 수 있음을 알 수 있었다.