Author, as appears in the article.: El Barbri, Noureddine; Duran, Cristhian; Brezmes, Jesus; Canellas, Nicolau; Ramirez, Jose Luis; Bouchikhi, Benachir; Llobet, Eduard
Department: Enginyeria Electrònica, Elèctrica i Automàtica
e-ISSN: 1424-8220
URV's Author/s: Brezmes Llecha, Jesús Jorge / Cañellas Alberich, Nicolau / Llobet Valero, Eduard / Ramírez Falo, José Luis
Keywords: Wavelet transform Support vector machine Metal oxide gas sensor Flow modulation support vector machine metal oxide gas sensor flow modulation
Abstract: In this paper, the use of a new technique to obtain transient sensor information is introduced and its usefulness to improve the selectivity of metal oxide gas sensors is discussed. The method is based on modulating the flow of the carrier gas that brings the species to be measured into the sensor chamber. In such a way, the analytes' concentration at the surface of the sensors is altered. As a result, reproducible patterns in the sensor response develop, which carry important information for helping the sensor system, not only to discriminate among the volatiles considered but also to semi-quantify them. This has been proved by extracting features from sensor dynamics using the discrete wavelet transform (DWT) and by building and validating support vector machine (SVM) classification models. The good results obtained (100% correct identification among 5 volatile compounds and nearly a 89% correct simultaneous identification and quantification of these volatiles), which clearly outperform those obtained when the steady-state response is used, prove the concept behind flow modulation. © 2008 by the authors.
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licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: eduard.llobet@urv.cat jesus.brezmes@urv.cat joseluis.ramirez@urv.cat nicolau.canyellas@urv.cat
Author identifier: 0000-0001-6164-4342 0000-0002-7704-8550 0000-0001-8231-4019 0000-0003-4856-8132
Last page: 7379
Record's date: 2024-10-12
Journal volume: 8
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.mdpi.com/1424-8220/8/11/7369
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Sensors. 8 (11): 7369-7379
APA: El Barbri, Noureddine; Duran, Cristhian; Brezmes, Jesus; Canellas, Nicolau; Ramirez, Jose Luis; Bouchikhi, Benachir; Llobet, Eduard (2008). Selectivity enhancement in multisensor systems using flow modulation techniques. Sensors, 8(11), 7369-7379. DOI: 10.3390/s8117369
Article's DOI: 10.3390/s8117369
Entity: Universitat Rovira i Virgili
Journal publication year: 2008
First page: 7369
Publication Type: Journal Publications