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, S.

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. U., Correia, R., Morgan, S. P., Hayes-Gill, B., Evans, D., Sinha, R., Norris, A., Harvey, D., Hardman, J. G., & Korposh, S. (2016, May). 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: Edited Proceedings
• Conference Name: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016)
• Start Date: May 31, 2016
• End Date: Jun 3, 2016
• Online Publication Date: May 30, 2016
• Publication Date: May 30, 2016
• Deposit Date: Jun 8, 2016
• Publicly Available Date: Jun 8, 2016
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 9916
• Article Number: 99160C
• Series Title: SPIE - International Society for Optical Engineering. Proceedings
• Series ISSN: 2410-9045
• Book Title: Sixth European Workshop on Optical Fibre Sensors
• ISBN: 9781510602199
• 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
• Contract Date: Jun 8, 2016