한국가스학회지 (Journal of the Korean Institute of Gas)

  • 제27권1호
  • /
  • Pages.70-77
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  • 2023
  • /
  • 1226-8402(pISSN)
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  • 2713-6922(eISSN)
한국가스학회 (The Korean Institute of GAS)
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가시광선과 중적외선 영역의 무보정 파장 변조 분광법을 이용한 O2와 NO 가스 농도 측정에 관한 연구

Study on Gas Concentration Measurement of O2 and NO Using Calibration-free Wavelength Modulation Spectroscopy in Visible and Mid-Infrared Region

  • 송아란 (한국생산기술연구원 탄소중립산업기술연구부문) ;
  • 주근희 (한국생산기술연구원 탄소중립산업기술연구부문) ;
  • 김강현 (한국생산기술연구원 탄소중립산업기술연구부문 ) ;
  • 황정호 (연세대학교 기계공학과) ;
  • 김대해 (한국생산기술연구원 탄소중립산업기술연구부문) ;
  • 이창엽 (한국생산기술연구원 탄소중립산업기술연구부문)
  • Aran Song (Carbon Neutral Technology R&D Department, Korea Institute of Industrial Technology) ;
  • Geunhui Ju (Carbon Neutral Technology R&D Department, Korea Institute of Industrial Technology) ;
  • Kanghyun Kim (Carbon Neutral Technology R&D Department, Korea Institute of Industrial Technology) ;
  • Jungho Hwang (Dept. of Mechanical Engineering, Yonsei University) ;
  • Daehae Kim (Carbon Neutral Technology R&D Department, Korea Institute of Industrial Technology) ;
  • Changyeop Lee (Carbon Neutral Technology R&D Department, Korea Institute of Industrial Technology)
  • 투고 : 2022.12.07
  • 심사 : 2023.02.07
  • 발행 : 2023.03.31
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초록

인체의 건강과 환경 오염으로 인해 대기환경 규제가 강화되었고 배출가스 저감 목표가 높아지면서 가스 측정법에 관한 관심이 늘어나고 있다. 측정법에는 표본 방식이 주로 사용되고 있으나 공간적 시간적 측정 한계로 인해, 실시간 In-situ 방식인 레이저 흡수분광법이 주목받고 있다. 본 연구에서는 파장 변조 분광법을 연구하였고 무보정 알고리즘에 대하여 설명하였다. 개발된 알고리즘은 46개의 다중 흡수선을 반영할 수 있도록 변경하였고 가시광선과 중적외선 영역의 광 흡수 신호 분석에 적용하였다. 추가로 레이저 변조 매개변수에 대한 차이를 분석하였고 다양한 농도 조건의 O2, NO 가스 측정 실험을 통해 성능을 검토한 결과, 선형성은 R2O2=0.99999, R2NO=0.99967로 나타났다.

Air environment regulations have been strengthened due to increasing air pollutant emissions, the target of reducing emissions has increased and interest in gas measurement methods is also increasing. The sampling method is mainly used, but due to the spatial and temporal measurement limitations, the laser absorption spectroscopy which is a real-time and in-situ method is in the spotlight. In this study, we studied the wavelength modulation spectroscopy and described the calibration-free algorithm. The developed algorithm was modified to reflect 46 multi-absorption lines and was applied to light absorption signal analysis in visible and mid-infrared regions. In addition, the difference between the modulation parameters of laser was analyzed. As a result of reviewing the performance through O2 and NO gas measurement experiments of various concentration conditions, the linearity was R2O2=0.99999 and R2NO=0.99967.

키워드

과제정보

본 연구는 KIST 주요 사업의 지원을 받아 수행되었습니다. (과제번호 : 2E30860-20-P051)

참고문헌

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