Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 146, Issue 2, Pages 460-465Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.11.034
Keywords
Gas sensor array; Drift; Common principal component analysis; Component correction; Electronic nose
Funding
- European Community [FP7/2007-2013, 216916]
- Spanish Ministerio de Educacion y Ciencia
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A new drift compensation method based on common principal component analysis (CPCA) is proposed. The drift variance in data is found as the principal components computed by CPCA. This method finds components that are common for all gasses in feature space. The method is compared in classification task with respect to the other approaches published where the drift direction is estimated through a principal component analysis (PCA) of a reference gas. The proposed new method-employing no specific reference gas, but information from all gases - has shown the same performance as the traditional approach with the best-fitted reference gas. Results are shown with data lasting 7 months including three gases at different concentrations for an array of 17 polymeric sensors. (C) 2009 Elsevier B.V. All rights reserved.
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