Self-calibrated Method for WMS Gas Sensor Immune to Optical and Electronic Drift

doi:10.1109/JSEN.2023.3322555

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	Self-calibrated Method for WMS Gas Sensor Immune to Optical and Electronic Drift
	F. Wang, J. Wu, W. Q, L. Q, C. D and X. Q
	2023
发表期刊	1530437X
页码	1-1
摘要	A novel self-calibrated method is proposed for wavelength modulation spectroscopy (WMS) system to improve the long-term stability for gas detection. In the method, the absorption-induced 2nd harmonic is normalized by an absorption-independent pulse signal. Since the 2nd harmonic and pulse signal are demodulated by the same lock-in amplifier, they are completely homologous regardless of the optical path or the circuitry. As a result, the influence on gas detection coming from the optical and electronic drift can be effectively suppressed. In the experiment, a WMS-based CH4 detection system using a 1653nm laser is constructed to verify the reliability of the new method. For detection of 500 ppm CH4 sample, more than 100 ppm measurement error coming from artificial fiber loss can be eliminated with this method. In continuous detection of 2 hours, 8.97 ppm (1.79%) measurement drift is observed from 501.07 ppm to 510.04 ppm. However, the drift is reduced to 0.95 ppm (0.19%) after applying the self-calibrated method. Comparative experiment with the 2f/1f technique indicates that the proposed self-calibrated method has a commensurate ability for interference cancellation. IEEE
DOI	10.1109/JSEN.2023.3322555
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收录类别	ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67920
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. Wang, J. Wu, W. Q, L. Q, C. D and X. Q. Self-calibrated Method for WMS Gas Sensor Immune to Optical and Electronic Drift[J]. 1530437X,2023:1-1.
APA	F. Wang, J. Wu, W. Q, L. Q, C. D and X. Q.(2023).Self-calibrated Method for WMS Gas Sensor Immune to Optical and Electronic Drift.1530437X,1-1.
MLA	F. Wang, J. Wu, W. Q, L. Q, C. D and X. Q."Self-calibrated Method for WMS Gas Sensor Immune to Optical and Electronic Drift".1530437X (2023):1-1.

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