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一种用于快速测量CO和HO通量的激光气体分析仪的研制，该分析仪利用导数吸收光谱法，数据速率为100Hz。

Development of a Laser Gas Analyzer for Fast CO and HO Flux Measurements Utilizing Derivative Absorption Spectroscopy at a 100 Hz Data Rate.

作者信息

Li Mingxing, Kan Ruifeng, He Yabai, Liu Jianguo, Xu Zhenyu, Chen Bing, Yao Lu, Ruan Jun, Xia Huihui, Deng Hao, Fan Xueli, Tao Bangyi, Cheng Xueling

机构信息

AnHui Institute of Optics and Fine Mechanics, HeFei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China.

University of Science and Technology of China, Hefei 230026, China.

出版信息

Sensors (Basel). 2021 May 13;21(10):3392. doi: 10.3390/s21103392.

DOI:10.3390/s21103392
PMID:34068048
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8152477/
Abstract

We report the development of a laser gas analyzer that measures gas concentrations at a data rate of 100 Hz. This fast data rate helps eddy covariance calculations for gas fluxes in turbulent high wind speed environments. The laser gas analyzer is based on derivative laser absorption spectroscopy and set for measurements of water vapor (HO, at wavelength ~1392 nm) and carbon dioxide (CO, at ~2004 nm). This instrument, in combination with an ultrasonic anemometer, has been tested experimentally in both marine and terrestrial environments. First, we compared the accuracy of results between the laser gas analyzer and a high-quality commercial instrument with a max data rate of 20 Hz. We then analyzed and compared the correlation of HO flux results at data rates of 100 Hz and 20 Hz in both high and low wind speeds to verify the contribution of high frequency components. The measurement results show that the contribution of 100 Hz data rate to flux calculations is about 11% compared to that measured with 20 Hz data rate, in an environment with wind speed of ~10 m/s. Therefore, it shows that the laser gas analyzer with high detection frequency is more suitable for measurements in high wind speed environments.

摘要

我们报告了一种激光气体分析仪的研制情况，该分析仪能够以100赫兹的数据速率测量气体浓度。这种快速的数据速率有助于在湍流高风速环境中进行气体通量的涡度协方差计算。该激光气体分析仪基于导数激光吸收光谱技术，用于测量水汽（波长约1392纳米处的H₂O）和二氧化碳（波长约2004纳米处的CO₂）。该仪器与超声风速仪相结合，已在海洋和陆地环境中进行了实验测试。首先，我们将激光气体分析仪与一台最高数据速率为20赫兹的高质量商用仪器的测量结果准确性进行了比较。然后，我们分析并比较了在高风速和低风速下，100赫兹和20赫兹数据速率下H₂O通量结果的相关性，以验证高频成分的贡献。测量结果表明，在风速约为10米/秒的环境中，与20赫兹数据速率的测量结果相比，100赫兹数据速率对通量计算的贡献约为11%。因此，这表明高检测频率的激光气体分析仪更适合在高风速环境中进行测量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/500a86d73c14/sensors-21-03392-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/c46992246361/sensors-21-03392-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/3c57ffe52a1f/sensors-21-03392-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/5ff94589980a/sensors-21-03392-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/efbfddacc7fd/sensors-21-03392-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/b61ea4d637eb/sensors-21-03392-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/48a5cdc15888/sensors-21-03392-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/7af095af510b/sensors-21-03392-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/500a86d73c14/sensors-21-03392-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/c46992246361/sensors-21-03392-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/3c57ffe52a1f/sensors-21-03392-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/5ff94589980a/sensors-21-03392-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/3690f5bc40f3/sensors-21-03392-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/3b45a3139abb/sensors-21-03392-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/efbfddacc7fd/sensors-21-03392-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/b61ea4d637eb/sensors-21-03392-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/48a5cdc15888/sensors-21-03392-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/7af095af510b/sensors-21-03392-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b2a/8152477/500a86d73c14/sensors-21-03392-g010.jpg

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