Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring

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dc.contributor.authorHromadka, J.
dc.contributor.authorKorposh, Sergiy
dc.contributor.authorPartridge, Matthew
dc.contributor.authorJames, Stephen W.
dc.contributor.authorCrump, Derrick
dc.contributor.authorDavis, Frank
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2017-02-13T11:58:38Z
dc.date.available2017-02-13T11:58:38Z
dc.date.issued2016-12-11
dc.description.abstractAn array of three long period gratings (LPGs) fabricated in a single optical fibre and multiplexed in the wavelength domain was used to measure simultaneously temperature, relative humidity (RH) and volatile organic compounds (VOCs), which are key indoor air quality (IAQ) indicators. Each LPG sensor was designed with optimised response to a particular measurand. The first, with no surface modification, was used to measure temperature. The second, modified by a mesoporous coating of silica nanoparticles (SiO2 NPs), was used to measure RH and the third, modified with a coating of SiO2 NPs infused with a functional material, p-sulphanatocalix[8]arene (CA[8]), was employed to monitor VOC concentration. The LPGs were fabricated with periods such that they operated at or near the phase matching turning point. The sensors were calibrated in the laboratory and the simultaneous measurement of the key indoor air quality parameters was undertaken in laboratory and office environments. It was demonstrated successfully that the data produced by the LPG sensor array under real conditions was in a good agreement with that produced by commercially available sensors. The average differences between values obtained by the optical fibre sensor and standard temperature and RH sensors were better than 0.5 °C and 5% respectively. Further, the potential application of fibre optic sensors for VOC detection at high concentrations has been demonstrated.en_UK
dc.identifier.citationHromadka J, Korposh S, Partridge MC et al., Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring. Sensors and Actuators B: Chemical, Volume 244, June 2017, Pages 217–225.en_UK
dc.identifier.cris15974640
dc.identifier.issn0925-4005
dc.identifier.urihttp://dx.doi.org/10.1016/j.snb.2016.12.050
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/11434
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectLong period grating (LPG)en_UK
dc.subjectMultiplexingen_UK
dc.subjectPhase match turning point (PMTP)en_UK
dc.subjectIndoor air quality (IAQ)en_UK
dc.subjectRelative humidity (RH)en_UK
dc.subjectVolatile organic compounds (VOCs)en_UK
dc.titleMulti-parameter measurements using optical fibre long period gratings for indoor air quality monitoringen_UK
dc.typeArticleen_UK

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