http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Chromatic Parameters in the Condition Monitoring of Synthetic Hydraulic Oils
C.V. Ossia,H. Kong,H.G. Han,L. Markova,V. Makarenko 한국트라이볼로지학회 2007 KSTLE International Journal Vol.8 No.1
Chromatic device was developed using light emitting diodes, optic fibers and photodiodes. Chromatic ratio and total contamination parameters based on transmitted light intensity in Red, Green, and Blue wavelengths were used for oil chemical and particulate contamination assessment. Chromatic ratio criterion was found independent of the particulate contamination of oil; but depended on chemical degradation, being more sensitive for synthetic than mineral hydraulic oil. Total contamination index of the sensor depended on both the chemical degradation and particulate contamination ofthe oil, being most sensitive in blue wavelength, and least in the red. Test results for synthetic hydraulic oils monitored corroborated with results of other tests such as viscosity, total acid number, elemental optical emission spectroscopy, particulate counts and UV- VIS photospectrometry. Chromatic ratio showed a clearer indication of oil degradation, compared to key monitoring parameters such as total acid number, viscosity and particle counts. The results showed that these parameters are effective criteria for the condition monitoring of synthetic hydraulic oils.
CHROMA TIC PARAMETERS IN THE CONDITION MONITORING OF SYNTHETIC HYDRAULIC OILS
C.V. Ossia,H. Kong,H.G. Han,L. Markova,V. Makarenko 한국트라이볼로지학회 2007 한국트라이볼로지학회 학술대회 Vol.2007 No.6
Chromatic device was developed using light emitting diodes, optic fibers and photodiodes. Chromatic ratio and total contamination parameters based on transmitted light intensity in Red, Green, and Blue wavelengths were used for oil chemical and particulate contamination assessment. Chromatic ratio criterion was found independent of the particulate contamination of oil; but depended on chemical degradation, being more sensitive for synthetic than mineral hydraulic oil. Total contamination index of the sensor depended on both the chemical degradation and particulate contamination of the oil, being most sensitive in blue wavelength, and least in the red. Test results for synthetic hydraulic oils monitored corroborated with results of other tests such as viscosity, total acid number, elemental optical emission spectroscopy, particulate counts and UV - VIS photospectrometry. Chromatic ratio showed a clearer indication of oil degradation, compared to key monitoring parameters such as total acid number, viscosity and particle counts. The results showed that these parameters are effective criteria for the condition monitoring of synthetic hydraulic oils.
Chromatic Parameters in the Condition Monitoring of Synthetic Hydraulic Oils
Ossia, C.V.,Kong, H.,Han, H.G.,Markova, L.,Makarenko, V. Korean Tribology Society 2007 KSTLE International Journal Vol.8 No.1
Chromatic device was developed using light emitting diodes, optic fibers and photodiodes. Chromatic ratio and total contamination parameters based on transmitted light intensity in Red, Green, and Blue wavelengths were used for oil chemical and particulate contamination assessment. Chromatic ratio criterion was found independent of the particulate contamination of oil; but depended on chemical degradation, being more sensitive for synthetic than mineral hydraulic oil. Total contamination index of the sensor depended on both the chemical degradation and particulate contamination of the oil; being most sensitive in blue wavelength, and least in the red. Test results for synthetic hydraulic oils monitored corroborated with results of other tests such as viscosity, total acid number, elemental optical emission spectroscopy, particulate counts and UV-VIS photospectrometry. Chromatic ratio showed a clearer indication of oil degradation, compared to key monitoring parameters such as total acid number, viscosity and particle counts. The results showed that these parameters are effective criteria for the condition monitoring of synthetic hydraulic oils.
자기탄성체 리본의 공진을 이용한 인-라인 오일 점도센서
공호성(H. Kong),한흥구(H.G. Han),L.V. Markova 한국트라이볼로지학회 2010 한국윤활학회지(윤활학회지) Vol.26 No.2
A new magnetoelastic technique of oil viscosity measurement, where the oil viscosity is estimated by frequency shift of natural oscillations of magnetoelastic ribbon, is implemented in this study. Laboratory tests of the detector prototype are performed for measurement of viscosity of base synthetic and mineral oils. It was found that measurement accuracy was better when damping factor was estimated in comparison with accuracy of frequency of damped oscillations. Thus the oil viscosity was calibrated as a function of number of pulses of the damped oscillations of magnetoelastic ribbon. Result generally showed that developed detector is promising for in line oil viscosity measurement in wide viscosity range from 10 cSt up to 600 cSt, while the viscosity measurement was relatively instable when the viscosity of test oil was over 400 cSt.
복수 경로를 지닌 자외선 형광측정기를 이용한 오일 산화도 측정장치
공호성(H. Kong),한흥구(H. G. Han),L. V. Markova 한국트라이볼로지학회 2010 한국윤활학회지(윤활학회지) Vol.26 No.3
An apparatus for measuring oil oxidation was developed, which is capable of being mounted to mechanical devices for detecting power of fluorescent light reflected from oil in real time as an indication of the oil oxidation. This device has an advantage over conventional fluorescence spectrometers where the thin film is required for the measurement. Clean and used oil samples (mineral and synthetic oils) were tested by the developed apparatus that calculates a fluorescence quantum yield and a light absorption coefficient of the oil based upon the signals from the two light-receiving members and evaluates the degree of oil oxidation of test oils based on the fluorescence quantum yield. Results generally show that the developed device is able to effectively evaluate oil oxidation characteristics on-site in the field.
공호성(H. Kong),오씨아 빅터(C.V. Ossia),한흥구(H.G Han),류보브 마르코바(L. Markova) 한국트라이볼로지학회 2008 한국윤활학회지(윤활학회지) Vol.24 No.1
In this work, a simple and low cost sensor technique is proposed to test oil color in real time using in-line sensor. It is presented to use a ratio of intensity in red wavelength range to intensities of green and blue wavelength ranges (defined as a 'chromatic ratio') in order to estimate the oil color change. The proposed sensor technique is realized by irradiating a white LED as light source and a RGB color sensor as photoreceiver, and the chromatic ratio of various types of used oils are measured. The results show that chromatic ratio generally reflects chemical deterioration of oil, including oil oxidation and thermal degradation. It is concluded that the proposed sensor could be used for an effective oil monitoring technology.
기계 상태진단을 위한 인-라인형 오일 모니터링 스마트 센서
공호성(H. Kong),오씨아 빅터(C.V. Ossia),한흥구(H.G. Han),류보브 마르코바(L. Markova) 한국트라이볼로지학회 2008 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.24 No.3
An integrated in-line oil monitoring detector assigned for continuous in situ monitoring multiple parameters of oil performance for predicting economically optimal oil change intervals and equipment condition control is presented in this study. The detector estimates oil deterioration based on the information about chemical degradation, total contamination, water content of oil and oil temperature. The oil oxidation is estimated by "chromatic ratio", total contamination is measured by the changes in optical intensity of oil in three optical wavebands ("Red", "Green" and "Blue") and water content is evaluated as Relative Saturation of oil by water. The detector is able to monitor oils with low light absorption (hydraulic, transformer, turbine, compressor and etc. oils) as well as oils with rather high light absorption in visible waveband (diesel and etc. oils). In a case study that the detector is applied to a diesel engine oil, it is found that the detector provides good results on oil chemical degradation as well as soot concentration.