Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Developments of a Cross-Correlation Calculation Algorithm for Gas Temperature Distributions Based on TDLAS

레이저흡수분광법(TDLAS) 기반 가스온도분포 산정을 위한 상호상관계산 알고리듬 개발

  • CHOI, DOOWON (Dept. of Electronics and Communication Eng., Korea Maritime & Ocean Univ.) ;
  • KIM, KWANGNAM (Dept. of Energy Plants Eng., Graduate School, Korea Maritime & Ocean Univ.) ;
  • CHO, GYONGRAE (Division of Mechanical Eng., Korea Maritime & Ocean Univ.) ;
  • SHIM, JOONHWAN (Dept. of Electronics and Communication Eng., Korea Maritime & Ocean Univ.) ;
  • KIM, DONGHYUK (Division of Mechanical Eng., Korea Maritime & Ocean Univ.) ;
  • DEGUCHI, YOSHIHIRO (Graduate School of Advanced Tech., & Science, Tokushima Univ.) ;
  • DOH, DEOGHEE (Division of Mechanical Eng., Korea Maritime & Ocean Univ.)
  • 최두원 (한국해양대학교 전자통신공학과) ;
  • 김광남 (한국해양대학교 대학원 에너지플랜트과) ;
  • 조경래 (한국해양대학교 공과대학 기계공학부) ;
  • 심준환 (한국해양대학교 전자통신공학과) ;
  • 김동혁 (한국해양대학교 공과대학 기계공학부) ;
  • ;
  • 도덕희 (한국해양대학교 공과대학 기계공학부)
  • Received : 2016.02.03
  • Accepted : 2016.02.28
  • Published : 2016.02.29
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Abstract

Most of reconstruction algorithms for the calculation of temperature distributions in CT (computed tomography)-TDLAS (tunable diode laser absorption spectroscopy) are based upon two-line thermometry method. This method gives unstable calculation convergence due to signal noise, bias error, and signal mis-matches. In this study, a new reconstruction algorithm based on cross-correlation for temperature calculation is proposed. The patterns of the optical signals at all wave lengths were used to reconstruct the temperature distribution. Numerical test has been made using phantom temperature distributions. Using these phantom temperature data, absorption spectra for all wave lengths were constructed, and these spectra were regarded as the signals that would be obtained in an actual experiments. Using these virtually generated experimental signals, temperature distribution was once again reconstructed, and was compared with those of the original phantom data. Calculation errors obtained by the newly proposed algorithm were slightly large at high temperatures with small errors at low temperature.

Keywords

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