Research on stability of gas monitoring system based on TDLAS

Meng Jiang; Qiang Yao; Lin Zhang; Ziqi Qu; Botao Zhao; Junlong Wang; Xuefeng Wang; Shiling Zhang

doi:10.1117/12.2524469

10 May 2019 Research on stability of gas monitoring system based on TDLAS

Meng Jiang, Qiang Yao, Lin Zhang, Ziqi Qu, Botao Zhao, Junlong Wang, Xuefeng Wang, Shiling Zhang

Proceedings Volume 11068, Second Symposium on Novel Technology of X-Ray Imaging; 110681C (2019) https://doi.org/10.1117/12.2524469
Event: Second Symposium on Novel Technology of X-Ray Imaging, 2018, Hefei, China

Abstract

During industrial process of gas monitoring, gas pumps are typically used for extract gas dynamically. In order to improve the response time of system, high flow rate pumps are used to draw gases under detection into the gas cell, and therefore, the airflow during monitoring has an impact on system stability. In this paper, we firstly optimize the design of absorption cell through software simulation, so as to improve the airflow stability at high flow rate. And secondly, the normalization algorithm is used to try to suppress the influence of airflow fluctuation on the stability. Finally, we built a dynamic methane measurement system, and the results of normalized and un-normalized concentrations over time were provided for comparison, respectively. The experiment results show that under the flow rate is 34L/min, the response time is 1.2s, and after normalized treatment, the stability is improved from 2.68ppm to 0.64ppm (1σ).

Citation Download Citation

Meng Jiang, Qiang Yao, Lin Zhang, Ziqi Qu, Botao Zhao, Junlong Wang, Xuefeng Wang, and Shiling Zhang "Research on stability of gas monitoring system based on TDLAS", Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110681C (10 May 2019); https://doi.org/10.1117/12.2524469

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