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외팔보형 압저항 가속도 센서의 압저항 변화율 분포에 관한 연구
한근조,심재준,이상석 東亞大學交附設 生産技術硏究所 2005 生産技術硏究所硏究論文集 Vol.10 No.-
Sensor used by semiconductor process produces an MAP sensor and applied to several industry. Among those sensors divided as transducer which convert physical quantity into electrical value, piezoresistive type sensor has been studied for the properties and sensitivity of piezoresistor. In this paper, the variation of seismic mass which have been functioned as actuator moving the cantilever beam analyzed the effect on distribution of resistance change ratio and supposed the optimal shape and position of piezoresistor. The resulting are following; According to the increment of seismic mass size, the value of resistance change ratio decreased cause by improve the stiffness. Y directional piezoresistor is formed in spot of 100㎛ apart from cantilever edge and length of that is 800㎛. To increase the sensitivity, piezoresistor is made as n-type and x-dirction.
Energy Method와 幾何學的 方法에 의한 圓環의 垂直, 水平 變位比較
韓根祚 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.1
To study the elastic behavior of thick ring under the concentrated compression load, the geometric method by the circumferential deformation and the angular displacement and energy method-Castigliano's theorem-were adopted. The influence of diameter, thickness and ratio t/D was researched and the comparison of the two theories were followed up by the experimental results. The results obtained are as follows. 1. P/Δ by either geometric method or energy method are exclusively determined by the ratio t/D, nether t nor D 2. In the vertical deformation P/Δ₃is smaller than P/Δ₁ and the experimental results P/Δ_(e) have almost linear trends and approach to P/Δ₃ more closely, and in the horizontal deformation, P/Δ'_(e) approaches to P/Δ'₂ 3. In the vertical deformation, the absolute value P/Δ₁ and the approximate value P/Δ₂ don't show great difference, but in the horizontal deformation, they do. At most, P/Δ' is larger than P/Δ.
쐐기형 레일클램프의 초기압착력 발휘를 위한 중추무게에 관한 연구
한근조,한동섭 東亞大學校 2005 東亞論叢 Vol.42 No.-
The wedge type rail clamp has the operating mechanism: First, the jaw pad clamps a rail with small clamping force. Next as the wind speed increases, the clamping force of the jaw pad is increased by the wedge. In order to design the wedge type rail clamp, we need to determine the proper wedge angle to minimize the sliding distance of a roller and the proper clamping angle of a locker to generate the initial clamping force of a jaw pad. The researches for the proper wedge angle have conducted, and in this study we conducted the investigation to determine the proper clamping angle of a locker in the rail clamp with wedge angle of 10˚. Because the initial clamping force of the jaw pad was determined by the clamping angle of the locker, in order to carry out the clamping force of a jaw pad, we measured the locking force applied to a locker with respect to the clamping angle of a locker, such as 3°, 4°, 5°, 6° using a pressure gauge, and compared the results with the FEA results.
쐐기형 레일클램프에서 라커의 물림각과 초기압착력 사이의 관계
한근조,한동섭 東亞大學交附設 生産技術硏究所 2005 生産技術硏究所硏究論文集 Vol.10 No.-
The rail clamp is the device to prevent that a container crane slips along rails due to the wind blast as well as to locate the crane in the set position through loading and unloading containers on a vessel in the quay. In order to design the rail clamp, we need to determine the proper wedge angle to minimize the sliding distance of a roller and the proper clamping angle of a locker to generate the initial clamping force of a jaw pad. The researches for the proper wedge angle have conducted. So in this study we look into the relationship between the clamping angle of a locker and the initial clamping force in the rail clamp with wedge angle of 10°. The initial clamping force of the jaw pad was determined by the clamping angle of the locker. Therefore after we measured the locking force of a locker and the tensile of extension bar with respect to the clamping angle of a locker, such as 2.18, 3.05, 3.92, 4.80°, we compared the results with the FEA results.
기계실 위치 변화가 고효율 갠트리 크레인의 안정성에 미치는 영향 분석
한근조,이성욱 東亞大學校 2005 東亞論叢 Vol.42 No.-
This study was carried out to analyze the effect of machinery house loaction on the stability of high efficiency gantry crane which can improve the productivity of the container transportation work by reducing cycle time. The wind load was evaluated according to 'Load Criteria of Building Structures' enacted by the ministry of construction & transportation. The uplift forces of high efficiency gantry crane under this wind load were calculated by analyzing reaction forces at each supporting point. And variation of reaction forces at each supporting point was analyzed according to machinery house location.