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Real-time and accurate detection of the flammable gas concentration is the key issue in spontaneous combustion prediction. A modified tunable diode laser absorption spectroscopy (TDLAS) technology has been used in this paper to achieve in-situ detection of trace Acetylene concentration. Noises and interference fringes are eliminated by wavelet adaptive threshold filtering, and then Kalman filtering...
Ethylene is one of the important signature gases in spontaneous combustion forecasting of coal goaf area. It is very important to detect the concentration of ethylene accurately. However, the absorption spectrum of the other interfering gases is always in the ethylene spectrum during the ethylene detecting, which has a great impact on the ethylene's accuracy. In this paper, a spectral correction method...
Based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) and the feature of Vertical Cavity Surface Emitting Laser (VCSEL) which wavelength scanning range up to several nanometers, the methane sensor system was designed. To verify the characteristic of anti-cross interference, we made some spectroscopy stimulation and experiments to analyze the affects to the methane measurement results of the...
It is important in the petrochemical industry that there are high sensitivity, high accuracy, low-power consumption, and intrinsically safe methods for the detection of propane gas, to provide early warning of potential explosion hazards in oil–gas storage and transportation. Tunable diode laser absorption spectroscopy (TDLAS) technology has the potential to provide an excellent basis both for early...
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