Drift correction for gas sensors using multivariate methods

Artursson, TomLinköpings universitet,Tekniska högskolan,Institutionen för fysik, kemi och biologi (author)

LIBRIS-ID:oai:DiVA.org:liu-49560
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-49560URI
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-8417URI
https://doi.org/10.1002/1099-128X(200009/12)14:5/6<711::AID-CEM607>3.0.CO;2-4DOI

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 an 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 he 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. Copyright (C) 2000 John Wiley & Sons, Ltd.

Eklov, TLinkoping Univ, SSENCE, S-58183 Linkoping, Sweden Linkoping Univ, Appl Phys Lab, S-58183 Linkoping, Sweden Nord Sensor Technol, S-58330 Linkoping, Sweden Umea Univ, Chemometr Res Grp, S-90187 Umea, Sweden (author)
Lundström, IngemarLinköpings universitet,Tekniska högskolan,Tillämpad Fysik(Swepub:liu)inglu57 (author)
Martensson, P (author)
Sjöström, MichaelUmeå universitet,Kemiska institutionen,Linkoping Univ, SSENCE, S-58183 Linkoping, Sweden Linkoping Univ, Appl Phys Lab, S-58183 Linkoping, Sweden Nord Sensor Technol, S-58330 Linkoping, Sweden Umea Univ, Chemometr Res Grp, S-90187 Umea, Sweden(Swepub:umu)misj0001 (author)
Holmberg, MartinLinköpings universitet,Tekniska högskolan,Institutionen för fysik, kemi och biologi(Swepub:liu)marho70 (author)
Linköpings universitetTekniska högskolan (creator_code:org_t)

By the author/editor: Artursson, Tom; Eklov, T; Lundström, Ingem ...; Martensson, P; Sjöström, Michae ...; Holmberg, Martin

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