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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 25 — Sep. 1, 2012
  • pp: 6111–6116

Removing baseline flame’s spectrum by using advanced recovering spectrum techniques

Luis Arias, Daniel Sbarbaro, and Sergio Torres  »View Author Affiliations

Applied Optics, Vol. 51, Issue 25, pp. 6111-6116 (2012)

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In this paper, a novel automated algorithm to estimate and remove the continuous baseline from measured flame spectra is proposed. The algorithm estimates the continuous background based on previous information obtained from a learning database of continuous flame spectra. Then, the discontinuous flame emission is calculated by subtracting the estimated continuous baseline from the measured spectrum. The key issue subtending the learning database is that the continuous flame emissions are predominant in the sooty regions, in absence of discontinuous radiation. The proposed algorithm was tested using natural gas and bio-oil flames spectra at different combustion conditions, and the goodness-of-fit coefficient (GFC) quality metric was used to quantify the performance in the estimation process. Additionally, the commonly used first derivative method (FDM) for baseline removing was applied to the same testing spectra in order to compare and to evaluate the proposed technique. The achieved results show that the proposed method is a very attractive tool for designing advanced combustion monitoring strategies of discontinuous emissions.

© 2012 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(280.1740) Remote sensing and sensors : Combustion diagnostics
(280.2470) Remote sensing and sensors : Flames

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: May 22, 2012
Revised Manuscript: July 27, 2012
Manuscript Accepted: July 28, 2012
Published: August 28, 2012

Luis Arias, Daniel Sbarbaro, and Sergio Torres, "Removing baseline flame’s spectrum by using advanced recovering spectrum techniques," Appl. Opt. 51, 6111-6116 (2012)

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