期刊论文详细信息
Sensors
Vapor Trace Recognition Using a Single Nonspecific Chemiresistor
Vladimir Dobrokhotov1  Alexander Larin2 
[1] Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101, USA;
关键词: sensor;    electronic nose;    pattern recognition;    transient response;    LDA;    QDA;   
DOI  :  10.3390/s130709016
来源: mdpi
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【 摘 要 】

An application of spectral analysis to the transient response signals of ALD-fabricated conductometric sensors (chemiresistors) upon exposure to short vapor pulses is discussed. It is based on the representation of a response curve in the frequency domain, followed by the multi-dimensional Quadratic Discriminant Analysis (QDA) for analyte identification. Compared to the standard steady-state amplitude analysis, this technique does not depend on a short-term sensor drift, does not have limitations for the number of extracted features and has a strict physical validation. Effective recognition of some relatively simple combustible analytes (acetone, toluene, ethanol) was demonstrated using a single nonspecific chemiresistor.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.

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