Research Papers: Sensing

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings

[+] Author Affiliations
Thomas Allsop, David Webb, Ian Bennion

Aston University, Aston Institute of Photonic Technologies, Birmingham, B4 7ET, United Kingdom

Ranjeet Bhamber, Juan Diego Ania Castañón

Instituto de Óptica “Daza de Valdés” IO-CSIC (CSIC), Serrano 121, 28006, Madrid, Spain

Glynn Lloyd

Moog Insensys Ltd., Ocean House, Whittle Avenue, Segensworth West, Fareham, PO15 5SX, United Kingdom

Martin R. Miller

University of Birmingham, Institute of Occupational and Environmental Medicine, B15 2TT, United Kingdom

Andrew Dixon

Umeco Process Material Ltd., 500 Bradford Road, Sandbeds, Keighley, W. Yorkshire, BD20 5NG, United Kingdom

J. Biomed. Opt. 17(11), 117001 (Nov 01, 2012). doi:10.1117/1.JBO.17.11.117001
History: Received March 12, 2012; Revised September 25, 2012; Accepted October 1, 2012
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Abstract.  An array of in-line curvature sensors on a garment is used to monitor the thoracic and abdominal movements of a human during respiration. The results are used to obtain volumetric changes of the human torso in agreement with a spirometer used simultaneously at the mouth. The array of 40 in-line fiber Bragg gratings is used to produce 20 curvature sensors at different locations, each sensor consisting of two fiber Bragg gratings. The 20 curvature sensors and adjoining fiber are encapsulated into a low-temperature-cured synthetic silicone. The sensors are wavelength interrogated by a commercially available system from Moog Insensys, and the wavelength changes are calibrated to recover curvature. A three-dimensional algorithm is used to generate shape changes during respiration that allow the measurement of absolute volume changes at various sections of the torso. It is shown that the sensing scheme yields a volumetric error of 6%. Comparing the volume data obtained from the spirometer with the volume estimated with the synchronous data from the shape-sensing array yielded a correlation value 0.86 with a Pearson’s correlation coefficient p<0.01.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Thomas Allsop ; Ranjeet Bhamber ; Glynn Lloyd ; Martin R. Miller ; Andrew Dixon, et al.
"Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings", J. Biomed. Opt. 17(11), 117001 (Nov 01, 2012). ; http://dx.doi.org/10.1117/1.JBO.17.11.117001


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