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1 September 2005 Respiratory monitoring using fibre long period grating sensors
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We demonstrate the use of a series of in-line fibre long period grating curvature sensors on a garment, used to monitor the thoracic and abdominal volumetric tidal movements of a human subject. 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.
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T. Allsop, R. Reeves, D. J. Webb, I. Bennion, T. Earthrowl, B. Jones, and M. Miller "Respiratory monitoring using fibre long period grating sensors", Proc. SPIE 5864, Novel Optical Instrumentation for Biomedical Applications II, 58640Q (1 September 2005);

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