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Journal of Biomedical Optics

Insole optical fiber Bragg grating sensors network for dynamic vertical force monitoring
Author(s): Maria Fátima Domingues; Cátia Tavares; Cátia Leitão; Anselmo Neto; Nélia Alberto; Carlos Marques; Ayman Radwan; Jonathan Rodriguez; Octavian Postolache; Eduardo Rocon; Paulo André; Paulo Antunes
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Paper Abstract

In an era of unprecedented progress in technology and increase in population age, continuous and close monitoring of elder citizens and patients is becoming more of a necessity than a luxury. Contributing toward this field and enhancing the life quality of elder citizens and patients with disabilities, this work presents the design and implementation of a noninvasive platform and insole fiber Bragg grating sensors network to monitor the vertical ground reaction forces distribution induced in the foot plantar surface during gait and body center of mass displacements. The acquired measurements are a reliable indication of the accuracy and consistency of the proposed solution in monitoring and mapping the vertical forces active on the foot plantar sole, with a sensitivity up to 11.06    pm / N . The acquired measurements can be used to infer the foot structure and health condition, in addition to anomalies related to spine function and other pathologies (e.g., related to diabetes); also its application in rehabilitation robotics field can dramatically reduce the computational burden of exoskeletons’ control strategy. The proposed technology has the advantages of optical fiber sensing (robustness, noninvasiveness, accuracy, and electromagnetic insensitivity) to surpass all drawbacks verified in traditionally used sensing systems (fragility, instability, and inconsistent feedback).

Paper Details

Date Published: 28 February 2017
PDF: 8 pages
J. Biomed. Opt. 22(9) 091507 doi: 10.1117/1.JBO.22.9.091507
Published in: Journal of Biomedical Optics Volume 22, Issue 9
Show Author Affiliations
Maria Fátima Domingues, Instituto de Telecomunicações (Portugal)
Ctr. de Automática y Robótica (Spain)
Univ. de Aveiro (Portugal)
Cátia Tavares, Instituto de Telecomunicações (Portugal)
Cátia Leitão, Instituto de Telecomunicações (Portugal)
Univ. de Aveiro (Portugal)
Anselmo Neto, UFES (Brazil)
Nélia Alberto, Instituto de Telecomunicações (Portugal)
Univ. de Aveiro (Portugal)
Carlos Marques, Instituto de Telecomunicações (Portugal)
Univ. de Aveiro (Portugal)
Ayman Radwan, Instituto de Telecomunicações (Portugal)
Jonathan Rodriguez, Instituto de Telecomunicações (Portugal)
Octavian Postolache, Instituto de Telecomunicações (Portugal)
Eduardo Rocon, Univ. Politécnica de Madrid (Spain)
Paulo André, Instituto de Telecomunicações (Portugal)
Paulo Antunes, Instituto de Telecomunicações (Portugal)
University of Aveiro (Portugal)

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