Abstract
Considering that the noises resulting from low modulation frequency are serious and cannot be totally eliminated by the classic filters, a novel infrared (IR) gas concentration detection system based on the least square fast transverse filtering (LS-FTF) self-adaptive modern filter structure is proposed. The principle, procedure and simulation on the LS-FTF algorithm are described. The system schematic diagram and key techniques are discussed. The procedures for the ARM7 processor, including LS-FTF and main program, are demonstrated. Comparisons between the experimental results of the detection system using the LS-FTF algorithm and those of the system without using this algorithm are performed. By using the LS-FTF algorithm, the maximum detection error is decreased from 14.3% to 5.4%, and also the detection stability increases as the variation range of the relative error becomes much smaller. The proposed LS-FTF self-adaptive denoising method can be of practical value for mid-IR gas detection, especially for weak signal detection.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
X. Qiao, J. Wang, Z. Jia, D. Zhao, H. Zhou and J. Wu, J. Optoelectron. Laser 20, 851 (2009). (in Chinese)
Q. L. Tan, W. D. Zhang and C. Y. Xue, Opt. Laser Technol. 40, 703 (2008).
Y. Zhang, W. Gao, Z. Song, Y. An, L. Li, Zh. Song, W. W. Yu and Y. Wang, Sensors and Actuators B-Chemical 147, 5 (2010).
A. Kock, A. Tischner, T. Maier, M. Kast, C. Edtmaier, C. Gspan and G. Kothleitner, Sensors and Actuators B-Chemical 138, 160 (2009).
A. Zybin, J. Koch and D. J. Butcher, Journal of Chromatography A 1050, 35 (2004).
G. J. Zhang and X. L. Wu, Opt. Lasers in Eng. 42, 219 (2004).
H. Y. Yuan, Martin M. F. Choi and W. H. Chan, Analytica Chimica Acta 481, 301 (2003).
C. Massie, G. Stewart, G. McGregor and J. R. Gilchrist, Sensors and Actuators B-Chemical 113, 830 (2006).
A. Benallal and A. Benkrid, Signal Processing 87, 904 (2007).
Q. Yang, Z. Li and G. Zhu, J. Optoelectron. Laser 21, 1341 (2010). (in Chinese)
M. Burgmair, M. Zimmer and I. Eisele, Sensors and Actuators B-Chemical 93, 271 (2003).
Author information
Authors and Affiliations
Corresponding author
Additional information
This work has been supported by the National “863” Project of China (Nos. 2007AA06Z112, 2007AA03Z446 and 2009AA03Z442), the National Natural Science Foundation of China (No.61077074), and the Science and Technology Department of Jilin Province of China (Nos. 20070709 and 20090422).
Rights and permissions
About this article
Cite this article
Ye, Wl., Yu, X., Zheng, Ct. et al. Self-adaptive CH4 concentration detection system based on infrared spectrum absorption principle. Optoelectron. Lett. 7, 217–221 (2011). https://doi.org/10.1007/s11801-011-0166-0
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11801-011-0166-0