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정황영 ( Hwang Young Jeong ),홍진태 ( Jin Tae Hong ),정창용 ( Chang Yong Joung ),안성호 ( Sung Ho Ahn ) 대한설비관리학회 2011 대한설비관리학회지 Vol.16 No.3
The In-Pile Test Section(IPS) installed in HANARO Fuel Test Loop(FTL) is designed as a pressure vessel design conditions of 350℃, 17.5MPa. The instrumentation MI-cables for thermocouples, SPND and LVDT are passed through the sealing plug, which is in the pressure boundary region and is a part of instrumentation feedthrough of MI-cable. In this study, the Mechanical sealing method was considered how to replace brazing method, and performance test results are introduced to the sealing plug of graphite sealant. The performance was verified through the hydrostatic test, and helium leak test.
정황영(Hwang-Young Jeong),홍준희(June-Hee Hong),강대화(Dae-Hwa Kang),송두상(Doo-Sang Song),곽양양(Yang-Yang Guo),이재설(Jae-seol Lee) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
The purpose of this paper lies in verification the possibility in counterfeit discrimination with excellent confidence as well as easy way of using for the general, as a consequence of a design or manufacture appropriate optical fiber sensor for counterfeit discrimination using wave length of a visible ray zone. The light was altered by lightening optical fiber sensor to particular part of banknotes in order to displacement response of optical fiber sensor. The experiment was processed with data of 100 banknotes on manufacture optical fiber, probe, jig. As a result, It was verified that discriminate counterfeit when the experiment was processing with hologram or CSI on the banknotes with three kinds of color printer.
자동 측정이 가능한 전용 캠 프로파일 측정 시스템 개발
정황영(Hwang-Young Jeong),이현석(Hyun-Seok Lee),홍준희(Jun-Hee Hong),박태민(Tae-Min Park),신우철(Woo-Cheol Shin),고준빈(Jun-Bin Koh) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
In this paper, It does the profile measurement of the cam of diesel engine SOHC of the actual object. It uses the measurement of run-out method. This method is that the surface of the object is measured by the sensor when the object rotate, and calculated and displayed by the computer the signal which acquired by sensor. When we acquire the signals, we have two error because of motion and contacting between cam and probe. In this paper, we compensate the motion error while simply liner equation. And we have a solution that we change the figure of probe when we have a contacting error. We compared the data measuring on developed automatic cam profile measuring system with the data measured on CMM.
정창용 ( Chang Yong Joung ),이철용 ( Chul Yong Lee ),홍진태 ( Jin Tae Hong ),정황영 ( Hwang Young Jeong ),안성호 ( Sung Ho Ahn ) 대한설비관리학회 2011 대한설비관리학회지 Vol.16 No.3
The MI(Mineral Insulated) cable is used for instrumentation of the nuclear fuel and material irradiation in the fuel test rig assembly due to its high electrical insulation, heat resistance and mechanical strength. During the installation of the instruments, if the MI cable is damaged by an inadvertent impact, it should be recovered with simple operation because it is difficult to change the sensors (T.C, LVDT and SPND etc.) and MI cables. In this sturdy, a new recovery method of the MI cable has been developed with several tests and verified its validity. Recovery process of the MI cable consists of removal process of the sheath of MI cable, joining process of the signal wires and recovery process of the sheath with a bushing. The validity of the proposed technique has been verified with insulation test.