Correlation-based spectroscopy and differential absorption of methane detection method

Abstract

This paper presents a method based on correlation spectroscopy and single-wavelength differential absorption technique of methane detection program. A new implementation is proposed which combines the advantages of the traditional correlation spectroscopy with differetial absorption technology of testing theory. A new fiber-optic methene direction system can be built when we choose the test equipments properly. The system not only eliminates fluctuations in light intensity due to the interference gas in the test gas, but also eliminates the impact of the surrounding environment and light source spectrum. Experiments prove that the designed system has good repeatability and stability.