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Calibration of mox gas sensors in open sampling systems based on gaussian processes
Örebro University, School of Science and Technology. (AASS Research Centre, Mobile Robotics and Olfaction Lab)ORCID iD: 0000-0003-0195-2102
Örebro University, School of Science and Technology.ORCID iD: 0000-0003-0217-9326
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2012 (English)In: Proceedings of the IEEE Sensors Conference, 2012, IEEE conference proceedings, 2012, 1-4 p.Conference paper, Published paper (Refereed)
Abstract [en]

Calibration of metal oxide (MOX) gas sensor for continuous monitoring is a complex problem due to the highly dynamic characteristics of the gas sensor signal when exposed to natural environment (Open Sampling System - OSS). This work presents a probabilistic approach to the calibration of a MOX gas sensor based on Gaussian Processes (GP). The proposed approach estimates for every sensor measurement a probability distribution of the gas concentration. This enables the calculation of confidence intervals for the predicted concentrations. This is particularly important since exact calibration is hard to obtain due to the chaotic nature that dominates gas dispersal. The proposed approach has been tested with an experimental setup where an array of MOX sensors and a Photo Ionization Detector (PID) are placed downwind w.r.t. the gas source. The PID is used to obtain ground truth concentration. Comparison with standard calibration methods demonstrates the advantage of the proposed approach.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 1-4 p.
Keyword [en]
Calibration, Estimation, Gas detectors, Microwave integrated circuits, Robot sensing systems, Training, Uncertainty
National Category
Computer Science Robotics
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:oru:diva-28845DOI: 10.1109/ICSENS.2012.6411464ISBN: 978-1-4577-1765-9 (print)OAI: oai:DiVA.org:oru-28845DiVA: diva2:618182
Conference
IEEE Sensors Conference, October 28-31, 2012, Taipei, Taiwan
Available from: 2013-04-26 Created: 2013-04-26 Last updated: 2017-10-17Bibliographically approved

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Publisher's full texthttp://www.aass.oru.se/Research/Learning/publications/Gonzalez_Monroy_etal_2012_IEEESensors12_Calibration_of_MOX_gas_sensors_in_open_sampling_systems_based_on_Gaussian_Processes.html

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
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Output format
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  • asciidoc
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