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수동형 FTIR 원격화학 탐지기를 이용한 SF6 오염운의 실시간 탐지
정유진,박병황,김주현 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.1
Brightness temperature spectra acquired from FTIR(Fourier Transform Infrared)-SCADS (Standoff Chemical AgentDetection System) could be available for detection and identification of the chemical agents and pollutants fromdifferent background. IR spectrum range of 770 to 1350 cm-1 is corresponding to “atmospheric window”. A2-dimensional(2D) brightness temperature spectrum was drawn from combining each data point through automaticcontinuous scanning of FTIR along with altitude and azimuth. At higher altitude, temperature of background wasdecreased but scattering effect of atmospheric gases was increased. Increase in temperature difference betweenbackground and blackbody in SCADS at higher temperature causes to increases in peak intensity of SF6. Thisapproach shows us a possibility that 2D visual information is acquired from scanning data with a single FTIRSCADS.
수동형 FTIR 원격화학 탐지기를 이용한 SF<sub>6</sub> 오염운의 실시간 탐지
정유진,박병황,김주현,Chong, Eugene,Park, Byeonghwang,Kim, Ju Hyun 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.1
Brightness temperature spectra acquired from FTIR(Fourier Transform Infrared)-SCADS (Standoff Chemical Agent Detection System) could be available for detection and identification of the chemical agents and pollutants from different background. IR spectrum range of 770 to 1350 $cm^{-1}$ is corresponding to "atmospheric window". A 2-dimensional(2D) brightness temperature spectrum was drawn from combining each data point through automatic continuous scanning of FTIR along with altitude and azimuth. At higher altitude, temperature of background was decreased but scattering effect of atmospheric gases was increased. Increase in temperature difference between background and blackbody in SCADS at higher temperature causes to increases in peak intensity of $SF_6$. This approach shows us a possibility that 2D visual information is acquired from scanning data with a single FTIR-SCADS.
강영일,박병황,최명진,홍대식,최수,김동환,박도현,Kang, Young-Il,Park, Byeong-Hwang,Choi, Myung-Jin,Hong, Dea-Sik,Choi, Soo,Kim, Dong-Hwan,Park, Do-Hyun 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.2
The passive open-path Fourier-Transform-Infrared system was implemented for the toxic gas monitoring. Noise Equivalent Differential Temperature(NEDT) was investigated as a system performance evaluation figure and analyzed numerically with the designed parameters. Calculated NEDT was compared with the experimental value in the wavelength region of $700{\sim}1400cm^{-1}^$. The minimum detectable gas concentration was estimated from the obtained NEDT at the absorption wavelength of $SF_6$.
열분해 질량분석법을 이용한 생물학 물질의 특성 연구(II)
최선경,박영규,박병황,Choi, Sun-Kyung,Park, Young-Kyu,Park, Byeng-Hwang 한국군사과학기술학회 2005 한국군사과학기술학회지 Vol.8 No.3
Pyrolysis-mass spectrometry has been used to characterize the 17 biological materials including bacteria and proteins. In this study, an in situ thermal-hydrolysis methylation(THM) procedure using tetramethylammonium hydroxide(TMAH) was employed. The biological materials are ionized using chemical ionization(CI) method with ethanol by ion trap mass spectrometer(ITMS), which attached with our own made pyrolyzer module, and then their pyrolysis mass spectra were obtained. The major distinct characteristic peaks were selected from all the range of mass spectra, and analyzed using principal component analysis(PCA) method to assess the classification/identification possibility of biological materials.
수동형 FTIR 분광계에서 초동 탐지 기법을 이용한고속 원거리 화학 가스 탐지 알고리즘
유형근,박동조,남현우,박병황 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.6
In this paper, we propose a fast detection and identification algorithm of chemical gases with a passive FTIR spectrometer. We use a pre-detection algorithm that can reduce the spatial region effectively for gas detection and the candidates of the target. It is possible to remove background spectra effectively from measured spectra with the least-squares method. The CC(Correlation Coefficients) and the SNR(Signal-to-Noise Ratio) methods are used for the detection of target gases. The proposed pre-detection algorithm allows the total process of chemical gas detection to be performed with lower complexity compared with the conventional algorithms. This paper can help developing real-time chemical detection instruments and various applications of FTIR spectrometers.