论文信息 - Improvement in the sensitivity of methane detection using a double fast Fourier transform-based filter

Improvement in the sensitivity of methane detection using a double fast Fourier transform-based filter

A multi-reflection cell has been employed to increase the sensitivity of the detection of methane gas. However, as the requirements of the detection system need to work on a low frequency range, the influence of the 1/f noise will be considered. This paper deal with this problem by investing the signal processing methods using Fast Fourier Transform (FFT) results have been shown an improvements of about 75% in the methane gas readings.

Gary Anderson | Youhua Chen | Ed Wilson | Samira Mahdi

[1] Alex A. Kazemi,et al. Photonic Applications for Aerospace, Commercial, and Harsh Environments IV , 2013 .

[2] Samira Mahdi,et al. A Double FFT Procedure to Improve the Sensitivity of a Tunable Diode Laser Open Path Spectrometer for Sensing Local Atmospheric Gas Concentrations on Mars , 2012 .

[3] D. D. Arslanov,et al. Rapid and sensitive trace gas detection with continuous wave Optical Parametric Oscillator-based Wavelength Modulation Spectroscopy , 2011 .

[4] C. Li,et al. Low-frequency wavelength modulation spectroscopy with D2 transition of atomic cesium by use of an external-cavity diode laser. , 2000, Applied optics.

[5] Gary Anderson,et al. A proposed robotic air quality monitoring system , 2012, World Automation Congress 2012.

[6] Gary Anderson,et al. A new double FFT-based filter to reduce the effect of 1/f noise spectrum in a tunable diode laser spectrometer (TDLS) , 2013, Defense, Security, and Sensing.

[7] F. Castagnoli,et al. Methane analyzer based on TDL’s for measurements in the lower stratosphere: design and laboratory tests , 2002 .

[8] A. I. Nadezhdinskii,et al. High sensitivity methane analyzer based on tuned near infrared diode laser , 1999 .

[9] Wang Xiaomei. Tunable Diode Laser Absorption Spectrometer Monitors the Ambient Methane with High Sensitivity , 2005 .