Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/115587
Title: Calibration transfer and drift counteraction in chemical sensor arrays using Direct Standardization
Author: Fonollosa Magrinyà, Jordi
Fernández Romero, Luis
Gutiérrez Gálvez, Agustín
Huerta, Ramón
Marco Colás, Santiago
Keywords: Direct Standardization
Detectors químics
Calibratge
Normalització
Chemical detectors
Calibration
Standardization
Issue Date: 18-May-2016
Publisher: Elsevier
Abstract: Inherent variability of chemical sensors makes it necessary to calibrate chemical detection systems individually. This shortcoming has traditionally limited usability of systems based on metal oxide gas sensor arrays and prevented mass-production for some applications. Here, aiming at exploring calibration transfer between chemical sensor arrays, we exposed five twin 8-sensor detection units to different concentration levels of ethanol, ethylene, carbon monoxide, or methane. First, we built calibration models using data acquired with a master unit. Second, to explore the transferability of the calibration models, we used Direct Standardization to map the signals of a slave unit to the space of the master unit in calibration. In particular, we evaluated the transferability of the calibration models to other detection units, and within the same unit measuring days apart. Our results show that signals acquired with one unit can be successfully mapped to the space of a reference unit. Hence, calibration models trained with a master unit can be extended to slave units using a reduced number of transfer samples, diminishing thereby calibration costs. Similarly, signals of a sensing unit can be transformed to match sensor behavior in the past to mitigate drift effects. Therefore, the proposed methodology can reduce calibration costs in mass-production and delay recalibrations due to sensor aging. Acquired dataset is made publicly available.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1016/j.snb.2016.05.089
It is part of: Sensors and Actuators B: Chemical, 2016, vol. 236, p. 1044-1053
Related resource: https://doi.org/10.1016/j.snb.2016.05.089
URI: http://hdl.handle.net/2445/115587
Appears in Collections:Articles publicats en revistes (Electrònica)
Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC))

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