http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
ELECTROMAGNETIC-BASED FORCE SENSOR FOR STRUCTURAL HEALTH MONITORING(SHM)
최만용(Man-Yong Choi),R.Sam,박해원(Hae-Won Park),박정학(Jeong-Hak Park) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
The demand for maintenance of structural health and safety to acceptable standards poses challenges for<br/> research and development of effective technologies for monitoring and measurement of parameters governing<br/> safety and health of structures. In this work, an electromagnetic based sensor has been investigated and<br/> developed for measuring force in pre-stressed steel cables and tendons. The change in magnetic<br/> permeability of a material caused by mechanical stress is exploited to measure force in the material. The<br/> sensor consists of a pair of sensing coils and a pair of reference coils. The sensing coils are wound around a<br/> stressed material while the reference pair are wound on a dummy specimen of same material as that under<br/> stress. When sensing and reference primary coils are excited by same current simultaneously, both the stressed<br/> and dummy materials are equally magnetized by the magnetic field generated by the current, and voltage is<br/> induced in the sensing and reference secondary coils. The induced voltage in each secondary coil is dependent<br/> on a number of factors including the magnetic permeability of its core which is a function of the core<br/> magnetizing current, temperature and stress/load. By suitably arranging the sensing and reference coils<br/> electro-magnetically, the effects of temperature and magnetizing current on the permeability of a stressed<br/> material can be eliminated in the output voltage of the sensor. The output voltage is a function of only the<br/> mechanical load in the stressed material, and can be calibrated for determination of force in pre-stressed<br/> materials.
위상잠금 초음파 적외선열화상에 의한 겹치기 마찰교반용접부의 결함 평가
최만용(Manyong Choi),박희상(Heesang Park),박정학(Jeonghak Park),강기수(Kisoo Kang) 한국비파괴검사학회 2010 한국비파괴검사학회지 Vol.30 No.2
겹치기 마찰교반용접은 새로운 고상접합법이다. 알루미늄 합금 6061-T6는 좋은 내식성과 중량 대비 높은 기계적 강도로 인해 넓은 분야에서 경량부재로 사용되고 있다. 본 논문에서 사용한 검사 방법인 위상잠금 초음파 적외선열화상기법은 넓은 면적을 동시에 검사할 수 있으며, 결함부와 건전부 사이의 위상차로부터 결함의 유무를 판단할 수 있다. 본고의 연구로부터, 위상잠금 적외선열화상기술을 이용하여 용접부의 열영상을 검출하여 기계적 강도와 비교 평가하였다. Lap joint friction stir welding(LFSW) is an relatively new solid state joining process. A6061-T6 aluminium alloy has gathered wide acceptance in the fabrication of light weight structures requiring a high strength to weight ratio and good corrosion resistance. Test methods used in this paper, lock-in thermography, a phase difference between the defect area and the healthy area indicates the qualitative location and size of the defect. In this paper, the defects detected from the thermal image of mechanical properties for weld were evaluated and compared by the lock-in infrared thermography technique.
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 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.