Title :
Simulation design and verification of CO monitoring based on tunable diode laser absorption spectroscopy
Author :
Li, Hong-lian ; Zhu, Yan ; Dong, Fang ; Li, Xiao-ting ; Zhang, Lian-shui
Author_Institution :
Coll. of Quality & Supervisor Technol., Hebei Univ., Baoding, China
Abstract :
Based on the tunable diode laser absorption spectroscopy (TDLAS) gas detection system, simulation models are built up using the dynamic simulation tool. The second harmonic signals of CO with six different concentrations are obtained depending on the simulation models. Regression coefficient is obtained by overall second harmonic least squares fitting of standard second harmonic spectrum signal of known concentration gas and spectrum signal of gas detected. The order of relative error for 1.97% CO is 10-5, which shows that the simulation models are reliable and the inversion algorithm is feasible to detect trace gases in theory.
Keywords :
gas sensors; least squares approximations; measurement by laser beam; optical harmonic generation; semiconductor lasers; signal processing; spectrochemical analysis; CO; carbon monoxide monitoring; gas detection system; inversion algorithm; second harmonic least square fitting; second harmonic signal; trace gas detection; tunable diode laser absorption spectroscopy; Absorption; Diode lasers; Gas detectors; Least squares methods; Monitoring; Optical design; Reliability theory; Signal detection; Spectroscopy; Tunable circuits and devices;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5545161
