基于石英增强光声光谱技术的痕量气体传感器，采用不同的石英音叉。
Quartz enhanced photoacoustic spectroscopy based trace gas sensors using different quartz tuning forks.
作者信息
Ma Yufei, Yu Guang, Zhang Jingbo, Yu Xin, Sun Rui, Tittel Frank K
机构信息
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China.
Post-doctoral Mobile Station of Power Engineering and Engineering Thermophysics, Harbin Institute of Technology, Harbin 150001, China.
出版信息
Sensors (Basel). 2015 Mar 27;15(4):7596-604. doi: 10.3390/s150407596.
A sensitive trace gas sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is reported. A 1.395 μm continuous wave (CW), distributed feedback pigtailed diode laser was used as the excitation source and H2O was selected as the target analyte. Two kinds of quartz tuning forks (QTFs) with a resonant frequency (f0) of 30.72 kHz and 38 kHz were employed for the first time as an acoustic wave transducer, respectively for QEPAS instead of a standard QTF with a f0 of 32.768 kHz. The QEPAS sensor performance using the three different QTFs was experimentally investigated and theoretically analyzed. A minimum detection limit of 5.9 ppmv and 4.3 ppmv was achieved for f0 of 32.768 kHz and 30.72 kHz, respectively.
报道了一种基于石英增强光声光谱（QEPAS）的灵敏痕量气体传感器平台。采用1.395μm连续波（CW）分布反馈尾纤二极管激光器作为激发源，并选择H2O作为目标分析物。首次分别采用两种谐振频率（f0）为30.72kHz和38kHz的石英音叉（QTF）作为声波换能器用于QEPAS，而不是采用f0为32.768kHz的标准QTF。通过实验研究和理论分析了使用这三种不同QTF的QEPAS传感器性能。对于f0为32.768kHz和30.72kHz的情况，最低检测限分别达到5.9 ppmv和4.3 ppmv。
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