JIAO Xiao-min, SHANG Li-ping. Research on noise analysis and compensation of gas detection based on TDLAS[J]. 2008, (3): 70-72+76. DOI: 10.13873/j.1000-97872008.03.012.
The principle of tunable diode laser absorption spectroscopy(TDLAS)is presented.The measuring volume fraction error reason on the gas volume fraction measurement system is analyzed in detail.The signal processing method of the liner least-squares fitting used to deal with second harmonic signal
which come from the absorption spectroscopy deducting background spectroscopy is researched.The method can effectively restrain noise and improve sensitivity.