Photoacoustic heterodyne breath sensor for real-time measurement of human exhaled carbon monoxide

被引：15
作者：
Li, Biao [1 ,2 ]
Feng, Chaofan [1 ,2 ]
Wu, Hongpeng [1 ,2 ]
Jia, Suotang [1 ,2 ]
Dong, Lei [1 ,2 ]
机构：
[1] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China
[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
来源：
PHOTOACOUSTICS | 2022年 / 27卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Photoacoustic spectroscopy; Photoacoustic heterodyne sensing; Breath sensor; Beat -frequency signal; Exhaled carbon monoxide;
D O I：
10.1016/j.pacs.2022.100388
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A breath sensor for real-time measurement of human exhaled carbon monoxide is reported. This breath sensor is based on a novel photoacoustic heterodyne gas sensing technique, which combines the conventional photoacoustic spectroscopy with the beat-frequency detection algorithm, thus offering a fast response time and a convenient optical alignment, as well as eliminating the needs for frequency calibration and wavelength locking. The principle of photoacoustic heterodyne gas sensing was explained in detail. The performance of the photoacoustic heterodyne breath sensor was evaluated in terms of minimum detection limit, response time, and linearity. The exhaled carbon monoxide levels of eight volunteers were measured and the results demonstrate the reliability and feasibility of this breath sensor.
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页数：6
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