Application of long-period grating sensors to respiratory function monitoring

Thomas D.P. Allsop; Tim Earthrowl; Richard Revees; David J. Webb; Martin Miller; Barrie W. Jones; Ian Bennion

doi:10.1117/12.569297

7 December 2004 Application of long-period grating sensors to respiratory function monitoring

Thomas D.P. Allsop, Tim Earthrowl, Richard Revees, David J. Webb, Martin Miller, Barrie W. Jones, Ian Bennion

Proceedings Volume 5588, Smart Medical and Biomedical Sensor Technology II; (2004) https://doi.org/10.1117/12.569297
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

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.

Citation Download Citation

Thomas D.P. 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, (7 December 2004); https://doi.org/10.1117/12.569297

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