Drift correction for gas sensors using multivariate methods
2000 (English)In: Journal of Chemometrics, Vol. 14, no 5-6, 711-23 p.Article in journal (Refereed) Published
Drift is one of the most serious impairments afflicting gas sensors. It can be seen as a gradual change in the sensor response over a long period of time when the external conditions are constant. This paper presents a new simple drift counteraction method based on PCA and PLS. The basic idea is to remove the drift direction component from the measurements. The direction of the drift, p, is calculated from measurements for a reference gas. Projecting the sample gas measurements on this vector gives the score vector t. The drift component tp T can then be removed from the sample gas data, which we call component correction (CC). The method is tested on a data set based on a reduced factorial design with four gases and a concentration gradient of hydrogen. It is found that the method works efficiently for both cases.
Place, publisher, year, edition, pages
2000. Vol. 14, no 5-6, 711-23 p.
IdentifiersURN: urn:nbn:se:umu:diva-8417DOI: 10.1002/1099-128X(200009/12)14:5/6<711::AID-CEM607>3.0.CO;2-4OAI: oai:DiVA.org:umu-8417DiVA: diva2:148088