Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor

Hernandez, F.U.; Correia, R.; Morgan, S.P.; Hayes-Gill, B.; Evans, D.; Sinha, R.; Norris, A.; Harvey, D.; Hardman, J.G.; Korposh, Sergiy

Abstract

An optical fibre sensor for simultaneous temperature and humidity measurements consisting of one fibre Bragg grating (FBG) to measure temperature and a mesoporous film of bilayers of Poly(allylamine hydrochloride)(PAH) and silica (SiO2) nanoparticles deposited onto the tip of the same fibre to measure humidity is reported. The hygroscopic film was created using the layer-by-layer (LbL) method and the optical reflection spectra were measured up to a maximum of 23 bilayers. The temperature sensitivity of the FBG was 10 pm/°C while the sensitivity to humidity was (-1.4x10-12 W / %RH) using 23 bilayers. The developed sensor was tested in the mechanical ventilator and temperature and humidity of the delivered artificial air was simultaneously measured. Once calibrated, the optical fibre sensor has the potential to control the absolute humidity as an essential part of critical respiratory care. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Citation

Hernandez, F., Correia, R., Morgan, S., Hayes-Gill, B., Evans, D., Sinha, R., Norris, A., Harvey, D., Hardman, J., & Korposh, S. Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor. Presented at Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), Limerick, Ireland

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016)
• Online Publication Date: May 30, 2016
• Publication Date: May 30, 2016
• Deposit Date: Jun 8, 2016
• Publicly Available Date: Jun 8, 2016
• Print ISSN: 0277-786X
• Electronic ISSN: 1996-756X
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 9916
• Article Number: 99160C
• Book Title: Sixth European Workshop on Optical Fibre Sensors
• DOI: https://doi.org/10.1117/12.2236850
• Keywords: Temperature, Humidity, Fibre Bragg grating, Fabry-Perot, layer-by-layer, Mechanical ventilator
• Public URL: https://nottingham-repository.worktribe.com/output/788043
• Publisher URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9916/1/Simultaneous-temperature-and-humidity-measurements-in-a-mechanical-ventilator-using/10.1117/12.2236850.short?SSO=1
• Additional Information: F.U. Hernandez ; R. Correia ; S.P. Morgan ; B. Hayes-Gill ; D. Evans ; R. Sinha ; A. Norris ; D. Harvey ; J.G. Hardman and S. Korposh " Simultaneous temperature and humidity measurements in a mechanical ventilator using an optical fibre sensor", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160C (May 30, 2016); doi:10.1117/12.2236850 ; http://dx.doi.org/10.1117/12.2236850. Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
• Contract Date: Jun 8, 2016