An improved Savitzky–Golay filtering algorithm for measuring pharmaceutical vial’s oxygen content based on wavelength modulation spectroscopy

Zhu, Gao Feng, Zhu, Hong Qiu, Yang, Chun Hua, Gui, Wei Hua

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Gao Feng Zhu, Hong Qiu Zhu, Chun Hua Yang, Wei Hua Gui An improved Savitzky–Golay filtering algorithm for measuring pharmaceutical vial’s oxygen content based on wavelength modulation spectroscopy (Улучшенный алгоритм Савицкого–Голея для измерений содержания кислорода в фармацевтических пробах на основе волновой модуляционной спектроскопии) [на англ. яз.] // Оптический журнал. 2017. Т. 84. № 5. С. 86–91.

Gao Feng Zhu, Hong Qiu Zhu, Chun Hua Yang, Wei Hua Gui An improved Savitzky–Golay filtering algorithm for measuring pharmaceutical vial’s oxygen content based on wavelength modulation spectroscopy (Улучшенный алгоритм Савицкого–Голея для измерений содержания кислорода в фармацевтических пробах на основе волновой модуляционной спектроскопии) [in English] // Opticheskii Zhurnal. 2017. V. 84. № 5. P. 86–91.

For citation (Journal of Optical Technology):

Gao Feng Zhu, Hong Qiu Zhu, Chun Hua Yang, and Wei Hua Gui, "Improved Savitzky-Golay filtering algorithm for measuring a pharmaceutical vial’s oxygen content based on wavelength modulation spectroscopy," Journal of Optical Technology. 84(5), 355-359 (2017). https://doi.org/10.1364/JOT.84.000355

Abstract:

An improved Savitzky-Golay filtering algorithm was adopted to denoise the on-line measurement of a pharmaceutical vial’s oxygen content based on wavelength modulation spectroscopy. This algorithm was created to feed second harmonic signals containing noise into a sliding window and to reduce, or eliminate, pulse interference. Then, the data containing no singular values were processed by weighted moving average filter. The second harmonic signals were simulated and the experiments performed to measure a pharmaceutical vial’s oxygen concentration by using the improved Savitzky-Golay filtering algorithm: results were compared with those from a traditional algorithm, and a wavelet transform filter. The results indicated that the improved Savitzky-Golay filtering algorithm can match the efficacy of the wavelet analysis, but the former ran much faster than the latter, and the system response time was about 300 ms. The improved Savitzky-Golay filtering algorithm was suitable for on-line measurement of gas concentration.

Keywords:

improved Savitzky-Golay filtering algorithm, wavelength modulation spectroscopy, second harmonic signal, wavelet transform, least squares method

Acknowledgements:

This work is partially supported by the State Key Program of National Natural Science of China Grant No. 61533021 and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No.61321003).

OCIS codes: 300.6360

References:

1. Werle P. A review of recent advances in semiconductor laser based gas monitors // Spectrochimica Acta Part A. 1998. V. 54. P. 197–236.
2. Ayan Ray, Amitava Bandyopadhyay, Sankar De, Biswajit Ray, Pradip N. Ghosh. A simple scanning semiconductor diode laser source and its application in wavelength modulation spectroscopy around 825 nm // Optics & Laser Technol. 2007. V. 39. P. 359–367.
3. Frish M.B., Wainner R.T., Laderer M.C., Green B.D., and Allen M.G. Standoff and miniature chemical vapor detectors based on tunable diode laser absorption spectroscopy // IEEE Sensors J. 2010. V. 10. P. 639–646.
4. Neethu S., Verma R., Kamble S.S., Radhakrishnan J.K., Krishnapur P.P., Padaki V.C. Validation of wavelength modulation spectroscopy techniques for oxygen concentration measurement // Sensors and Actuators B. 2014. V. 192. P. 70–76.
5. Werle P., Mücke R. The limits of signal averaging in atmospheric trace-gas monitoring by tunable diode-laser absorption spectroscopy // Appl. Phys. B. 1993. V. 57. P. 131–139.
6. Werle P.W., Scheumann B., and Schandl J. Real-time signal-processing concepts for trace-gas analysis by diode-laser spectroscopy // Opt. Eng. 1994. V. 33. P. 3093–3105.
7. Leleux D.P., Claps R., Chen W., Tittel F.K., and Harman T.L. Applications of Kalman filtering to real-time trace gas concentration measurements // Appl. Phys. B. 2002. V. 74. P. 85–93.
8. Li J., Parchatka U., and Fischer H. Applications of wavelet transform to quantum cascade laser spectrometer for atmospheric trace gas measurements // Appl. Phys. B. 2012. V. 108. P. 951–963.
9. Tian G. and Li J. Tunable diode laser spectrometry signal de-noising using discrete wavelet transform for molecular spectroscopy study // Opt. Appl. 2013. V. 43. P. 803–815.
10. Yunxia Meng, Tiegen Liu, Kun Liu, Junfeng Jiang, Ranran Wang, Tao Wang, and Haofeng Hu. A modified empirical mode decomposition algorithm in TDLAS for gas detection // IEEE Photonics J. 2014. V. 6. P. 6803209. [10] 窗体顶端
11. Bolshov M.A., Kuritsyn Yu.A. Tunable diode laser spectroscopy as a technique for combustion diagnostics // Spectrochimica Acta Part B. 2015. V. 106. P. 45–66.