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단일 조성 실온 경화형 실리콘러버를 지지체로 사용한 고체상 탄산이온선택성 전극의 개발
김미경,윤인준,조성호,신혜라,한종호,하정한,남학현,차근식,Kim, Mi-Kyoung,Yoon, In-Jun,Cho, Sung-Ho,Shin, Hye-Ra,Han, Jong-Ho,Ha, Jeong-Han,Nam, Hak-Hyun,Cha, Geun-Sig 대한화학회 2004 대한화학회지 Vol.48 No.3
소형 고체상 전극에 단일 조성 실온 경화형(one-component room temperature vulcanizing type) 실리콘러버 730(730 RTV)을 지지체로 도입하여 가소제가 필요 없는 탄산이온선택성 전극막을 개발하였다. 본 연구에서 최적화된 탄산이온선택성 전극막의 조성은 85.75 wt%의 730 RTV, 11.08 wt%의 trifluoroacetyl-p-decylbenzene(TFADB), 3.17 wt%의 tridodecyl-methylammonium chloride(TDMACl)로 제조 되었고, 우수한 전기화학적 특성(감응기울기 (26.3 mV/dec.), 선택성($logKT^{pot}_{CO_{2},Cl^-}$= -4.00, $logKT^{pot}_{TCO_{2},Sal^-}$=1.69), 검출한계(4.0${\times}10^{-4}M$))을 보였으며, 이와 같은 조성의 막을 도입한 평면형 고체상 센서는 60일 이상 초기특성을 유지하였다. We developed a miniaturized solid-state carbonate ion-selective electrode (carbonate ISE) based on one-component room temperature vulcanizing type silicone rubber 730 (730 RTV) without adding plasticizer to the matrix. The optimized carbonate ion selective membrane is prepared with 85.8 wt% of 730 RTV, 11.1 wt% of trifluoroacetyl-p-decylbenzene (TFADB), and 3.1 wt% of tridodecyl-methylammonium chloride (TDMACl). This carbonate ISE exhibited excellent potentiometric properties (i.e., slope: 26.3 mV/dec; selectivity: $logKT^{pot}_{CO_{2},Cl^-}$= -4.00 and $logKT^{pot}_{TCO_{2},Sal^-}$=1.69); and detection limit for $TCO_2:\;4.0{\times}10^{-4}M$). In addition, the early potentiometric properties of the solid-state sensor with optimized membrane composition were not deteriorated for more than 60 days.
절삭공구의 열변형 오차 및 절삭력 변형 오차에 관한 연구
오명석(Myung-Seok Oh),윤인준(In-Jun Yoon),백대균(Dae-Kyun Baek) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.4
This paper presents a method to predict tool deflection induced by the thermal distribution and the cutting force using FEM in milling operation. The thermal distribution of cutting tool was predicted using FEM after measuring the temperature of the end of tool and of the tool holder. The thermal deflection of cutting tool was predicted using FEM as well. The tool deflection induced by the cutting force was analyzed with the solid model of cutting tool. An end mill tool caused most of tool deflection comparing to tool holder. Most of thermal deflection came from Z-direction and most of tool deflection induced by the cutting force came from X and Y direction. Precision cutting will be accomplished when tool locations are generated considering the thermal deflection of cutting tool and the tool deflection induced by the cutting force in CAD/CAM.
금속 산화물을 포함한 탄소반죽 전극 어레이로 제작한 전자 혀
한종호,김동선,김종식,윤인준,차근식,남학현,Han Jong Ho,Kim Dong Sun,Kim Jong Sik,Yoon In Jun,Cha Geun Sig,Nam Hakhyun 한국전기화학회 2004 한국전기화학회지 Vol.7 No.4
금속산화물 $(TiO_2,\;RuO_2,\;PbO_2,\;Ni(OH)_2)$과 Prussian blue (PB)를 각각 탄소반죽에 혼합한 후 스크린 프린팅 기법으로 6종의 탄소반죽 전극들을 제작하였다. 제작된 탄소반죽 전극들로 전자혀 시스템을 제작하여 다양한 음료수와 식품에 대한 감응을 0.1M carbonate buffer, pH 9.6완충 용액에 묽힌 후 대시간전류법의 방법으로 측정하였다 얻어진 자료를 주성분 분석법 (principal component analysis; PCA)으로 처리한 후 식음료의 맛을 평가할 수 있도록 2차원 좌표계에 표시하였으며, 그 결과 본 실험에서 제작한 시스템 및 분석법은 다양한 식음료의 종류를 뚜렷이 구분해 낼 수 있음을 확인하였다. All array of carbon paste-based electrodes was prepared by screen printing the carbon paste modified with metal oxides $(TiO_2,\;RuO_2,\;PbO_2,\;Ni(OH)_2)$ and Prussian blue (PB). An electronic tongue system was assembled with the carbon-paste electrode array, and applied to discriminate the tastes of various commercial beverages and foods by measuring the chronoamperometric responses to the samples diluted in 0.1M carbonate buffer (pH 9.6). The results were analyzed with principal component analysis(PCA) method and plotted on two dimensional PCA coordinate; it was apparent that the amperometric electronic tongue system could discriminate the types of various foods and beverages.
공작기계 열변형 보정을 위한 발열실험 방법에 관한 연구
윤인준,김형식,고태조,김희술 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.1
Thermal distortion is a critical issue in machine tools, especially in high speed machining. This is the reason why recent machine tools have thermal compensation function. To compensate thermal distortion, it is necessary to make a model that has some relationship between temperature and deformation Various experimental methods have widely been used in thermal test: constant spindle speed, unit step speed increase, random spindle speed. etc. This paper focuses on which type of spindle operation condition is good for thermal experiment. Also, experimental data is modeled using multiple linear regression models and compared each other to select a method. Consequently, it turned out that the condition of 75% constant of maximum spindle speed is good enough to generate temperature and distortion data.
주파수 분석과 시계열 해석법을 이용한 밀링공구 마모검출에 관한 연구
金正顯,尹人準 慶一大學校 1999 論文集 Vol.16 No.3
The detection of tool wear in cutting process is very important because tool wear have an effect on safety of machine structure, cost and precision of workpiece. During cutting one of the indirected tool wear detection technique is used to develop methode to detect the tool wear conditions. The cutting force signals varied with the cutting condition and tool wear are analyzed by FFT (Fast Fourier Transform) and Time-series. In-process detection of tool wear can be possible by observing the amplitudes of a specific components of cutting force in frequency domain.
윤인준,류한선,고태조,김희술 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.3
Thermally induced errors of machine tools have been recognized as one of the most important issues in precision machining. This is probably the most formidable obstacle to obtain high level of machining accuracy. To this regard, the experimental compensation methodologies such as software-based method or origin shift of machine tool axes have keen suggested In this research, to cope with thermal deformation, a model based correction was carried out with the function of an external machine coordinate shift Models with multi-linear regression or neural network were investigated to selected a good one for thermal compensation. Consequently, multi-linear regression model combined with origin shift was verified good enough form the machining of dot matrices of plate with bail end milling.