Selective detection of hazardous VOCs for indoor air quality applications using a virtual gas sensor array
Selective detection of hazardous VOCs for indoor air quality applications using a virtual gas sensor array
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DOI：
10.5194/jsss-3-253-2014
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发表时间：
2014-01-01
影响因子：
1
通讯作者：
Schuetze, A.
中科院分区：
文献类型：
--
作者：
Leidinger, M.;Sauerwald, T.;Schuetze, A.
提出了一种检测ppb和亚ppb浓度有害挥发性有机化合物（VOCs）的方法。在温度循环操作中使用三种类型的金属氧化物半导体（MOS）气体传感器，在不同的乙醇背景下成功地识别出痕量浓度的甲醛、苯和萘，反映了世卫组织和欧洲国家卫生机构提出的阈值限值。在信号处理方面，分别对单传感器数据和传感器融合数据进行线性判别分析。采用相同的气体测量装置和数据处理方法，对采用相同类型气体传感器的室内空气质量监测综合现场测试传感器系统进行了表征。由于硬件组件的气体排放，系统的性能降低。这些污染已用分析方法进行了调查。尽管灵敏度降低，但在ppb范围内（甲醛100 ppb；苯5 ppb；萘20 ppb）的目标VOCs浓度仍然可以通过系统清楚地检测到，特别是当使用传感器融合方法结合不同MOS传感器类型的数据时。
An approach for detecting hazardous volatile organic compounds (VOCs) in ppb and sub-ppb concentrations is presented. Using three types of metal oxide semiconductor (MOS) gas sensors in temperature cycled operation, formaldehyde, benzene and naphthalene in trace concentrations, reflecting threshold limit values as proposed by the WHO and European national health institutions, are successfully identified against a varying ethanol background of up to 2 ppm. For signal processing, linear discriminant analysis is applied to single sensor data and sensor fusion data.Integrated field test sensor systems for monitoring of indoor air quality (IAQ) using the same types of gas sensors were characterized using the same gas measurement setup and data processing. Performance of the systems is reduced due to gas emissions from the hardware components. These contaminations have been investigated using analytical methods. Despite the reduced sensitivity, concentrations of the target VOCs in the ppb range (100 ppb of formaldehyde; 5 ppb of benzene; 20 ppb of naphthalene) are still clearly detectable with the systems, especially when using the sensor fusion method for combining data of the different MOS sensor types.