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이대식,한상도,명광식,이상호,손영목,이종도 ( D . S . Lee,S . D . Han,k . S . Myung,S . H . Lee,Y . M . Son,J . D . Lee ) 한국센서학회 1995 센서학회지 Vol.4 No.4
Catalytic combustion type gas sensor was fabricated by using γ-Al₂O₃, Pd catalyst and some binders for metane and propane detection. Using the gas sensor, digital gas meter was manufactured and tested for sensing performance. The fabricated sensor had power consumption of 700mW with applied voltage of do 2V and the output voltage of the sensor was about 700mV for propane of 1,000ppm and 500mV for methane of 1,000ppm. In 10 cycle injection of the gases of 2,400ppm. The digital meter showed good sensitivity, linearity. and reproductivity with precision of ±25ppm(±1%)
비례제어방정식 솔레노이드 밸브 압력제어특성에 관한 수치해석
태혁준(Heyokjun Tae),김형만(Hyung-Man Kim),손영목(Youngmog Son),양갑진(Kabjin Lee),이창훈(Changhoon Lee),이현우(Hyunwoo Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
In the present paper, numerical analyses of pressure control characteristics have been performed in a variable pressure solenoid valve. A number of solenoid valves have been used in the electronic control system, especially automatic transmission of an automobile. Variable pressure solenoid valve is intended to produce spatial movement by the electrical signal. Numerical analyses of pressure control characteristics have been practiced by the Finite Difference Method, which show the pressure distribution in the solenoid valve. The results of numerical analyses show the dependence of pressure distribution on the displacement of the spool in the solenoid valve, and then, are compared with the experimental results.
김종원,손영목,심규성,박기배,이상호 ( Jong Won Kim,Young Mok Son,Kyu Sung Sim,Kee Bae Park,Sang Ho Lee ) 한국센서학회 1994 센서학회지 Vol.3 No.1
Catalytic combustion type sensor was fabricated for alcohol detection, and its characteristics were tested. When the resistance of Pt coil for pellistor is 2.0 ohm, suggestible input power to bridge circuit was about 300 mW for methanol detection, and in the range from 350 mW to 400 mW for ethanol. Pellistors were prepared by means of impregnating Pt or Pd on the γ-alumina bead for sensing element, and transition metals such as Co₃O₄, Fe₂O₃ for compensating element.
김종원,심규성,손영목,이상호,박기배,명광식 ( Jong Won Kim,Kyu Sung Sim,Young Mok Son,Sang Ho Lee,Kee Bae Park,Kwang Shik Myung ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.6
Problems encountered in use of pulverized coal, in particular, have practical implications related to coal blending and up-grading of imported coals. Practically, significant problems are recognized in such aspects as control of the combustion process, fireside corrosion, ash and pollution. The methodology of predicting problems using pilot scale facility is less expensive, requires less coal and less time to excute, compared to the use of full scale facility. In this study, evaluation of Indonesian Roto coal was performed in a pilot scale coal combustion test facility. Burnout ratio of coal was higher than 98%, and increase of swirl number and preheat temperature of air made flame stabilize. NO_χ concentration in flue gas was lower in the range 0.5-0.9 of swirl number. Concentrations of oxygen and carbon dioxide in flue gas were constant in spite of variation of swirl number in this work.
TiO2 귀금속을 첨가한 WO3 후막 센서의 제조 및 NOx 감응 특성
이대식,한상도,손영목,이덕동 ( Dae Sik Lee,Sang Do Han,Young Mok Son,Duk Dong Lee ) 한국센서학회 1997 센서학회지 Vol.6 No.4
NO_x sensors using tungsten oxide films as a base material were prepared and their electrical and sensing characteristics have been investigated. The WO₃ thick films doped with SnO₂ or TiO₂ showed higher sensitivity and better sorption characteristics to NOx gas than the pure WO₃ films material in air at operating temperature of 400 ℃. By addition of noble catalysts, such as Ru or Au, to the TiO₂-WO₃ thick films, their sensitivity, recovery and selectivity to NO_x gas were found to be more enhanced.
SnO2 과 Pt 를 첨가한 WO3 후막센서의 제조 및 NOx 감응 특성
이대식,한상도,박기배,심규성,이덕동,손영목 ( D . S . Lee,S . D . Han,K . B . Park,K . S . Sim,D . D . Lee,Y . M . Son ) 한국센서학회 1996 센서학회지 Vol.5 No.5
highly sensitive WO₃ doped with SnO₂ and Pt thick-film sensors for NOx gas were fabricated. The sensors had a maximum sensitivity at operating temperature of 250℃, but the optimum operation temperature, considering recovery desorption time, was at 330℃. These sensors improved sensitivity, response and recovery time, selectivity and stability, as compared to WO₃ sensors. The good linearity of sensitivity as a function of the gas concentration exhibited the possibility to be used for concentration meter.