Signal correction using transmitted spot information: A low error photoacoustic spectroscopy-based gas detection system

被引：0
作者：
Cheng, Hongtu [1 ,2 ]
Zeng, Fuping [2 ]
Chao, Xianzong [2 ]
Jiang, Xinghai [2 ]
Fang, Zhi [1 ]
机构：
[1] Nanjing Tech Univ, Coll Elect Engn & Control Sci, Nanjing 211816, Peoples R China
[2] Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Peoples R China
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2025年 / 383卷
基金：
中国博士后科学基金;
关键词：
Photoacoustic spectroscopy; Gas sensing; Correction; Measurement error; SENSOR; OPTIMIZATION; ACETYLENE; CELL; CO;
D O I：
10.1016/j.sna.2024.116179
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Photoacoustic spectroscopy (PAS)-based gas sensing system is popular in industries due to advantages of high sensitivity and portable. However, data fluctuation often occurs in the on-line monitoring mode, and the reason has not been found yet. In this work, influential factors and environment-related variables of the photoacoustic (PA) signal were analyzed. A beam quality analyzer was employed as a tool to detect the parameters of the optical path condition. The robustness was verified by a long-time measurement. The results showed that the centroid y of the beam spot has the best linear correlation with the PA signal with a correlation coefficient higher than 0.9. The largest and average measurement error were 26.98 % and 10.95 % without the correction, while after the correction they were only 12.24 % and 5.39 %. The results can provide ideas to the robustness improvement of the PAS gas detection system.
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页数：7
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