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Research on stability of gas monitoring system based on TDLAS
Author(s): Meng Jiang; Qiang Yao; Lin Zhang; Ziqi Qu; Botao Zhao; Junlong Wang; Xuefeng Wang; Shiling Zhang
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Paper 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).

Paper Details

Date Published: 10 May 2019
PDF: 5 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110681C (10 May 2019); doi: 10.1117/12.2524469
Show Author Affiliations
Meng Jiang, Institute of Beijing Aerospace Control Device (China)
Qiang Yao, State Grid Chongqing Electric Power Co. (China)
Lin Zhang, Institute of Beijing Aerospace Control Device (China)
Ziqi Qu, Institute of Beijing Aerospace Control Device (China)
Botao Zhao, Institute of Beijing Aerospace Control Device (China)
Junlong Wang, Institute of Beijing Aerospace Control Device (China)
Xuefeng Wang, Institute of Beijing Aerospace Control Device (China)
Shiling Zhang, State Grid Chongqing Electric Power Co. (China)


Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

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