Application of long period gratings sensors to respiratory function monitoring

Thomas D.P. Allsop, T. Earthgrowl, R. Revees, D.J. Webb, M. Miller, B. Jones, I. Bennion

Research output: Chapter in Book/Published conference outputConference publication


A series of in-line curvature sensors on a garment are used to monitor the thoracic and abdominal movements of a human during respiration. These results are used to obtain volumetric tidal changes of the human torso showing reasonable agreement with a spirometer used simultaneously to record the volume at the mouth during breathing. The curvature sensors are based upon long period gratings written in a progressive three layered fibre that are insensitive to refractive index changes. The sensor platform consists of the long period grating laid upon a carbon fibre ribbon, which is encapsulated in a low temperature curing silicone rubber. An array of sensors is also used to reconstruct the shape changes of a resuscitation manikin during simulated respiration. The data for reconstruction is obtained by two methods of multiplexing and interrogation: firstly using the transmission spectral profile of the LPG's attenuation bands measured using an optical spectrum analyser; secondly using a derivative spectroscopy technique.
Original languageEnglish
Title of host publicationSmart medical and biomedical sensor technology II
EditorsBrian M. Cullum
Number of pages9
ISBN (Print)978-0-8194-5541-3
Publication statusPublished - Dec 2004
EventSmart Medical and Biomedical Sensor Technology II - Philadelphia, PA, United States
Duration: 25 Oct 2004 → …

Publication series

NameSPIE proceedings
ISSN (Print)0277-786X


ConferenceSmart Medical and Biomedical Sensor Technology II
Country/TerritoryUnited States
CityPhiladelphia, PA
Period25/10/04 → …

Bibliographical note

Thomas D. Allsop ; Tim Earthrowl ; Richard Revees ; David J. Webb ; Martin Miller ; Barrie W. Jones and Ian Bennion "Application of long-period grating sensors to respiratory function monitoring", Proc. SPIE 5588, Smart Medical and Biomedical Sensor Technology II, 148 (December 7, 2004);

Copyright 2004 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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.


  • curvature sensing
  • respiratory monitoring
  • long period gratings


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