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 | |
【 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.
【 预 览 】
Files | Size | Format | View |
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RO202003190034690ZK.pdf | 1411KB | download |