Low-cost intrinsic optical fiber FPI sensor for knee kinematic gait analysis and e-Health architecture

M. Fátima Domingues; Ana Nepomuceno; Cátia Tavares; Nélia Alberto; Ayman Radwan; Paulo André; Paulo Antunes

doi:10.1117/12.2520877

11 April 2019 Low-cost intrinsic optical fiber FPI sensor for knee kinematic gait analysis and e-Health architecture

M. Fátima Domingues, Ana Nepomuceno, Cátia Tavares, Nélia Alberto, Ayman Radwan, Paulo André, Paulo Antunes

Proceedings Volume 11028, Optical Sensors 2019; 1102820 (2019) https://doi.org/10.1117/12.2520877
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic

Abstract

Analysis of gait pattern of individuals is a very useful tool for the identification of locomotive motor anomalies, which can lead to early diagnosis and adequate treatment of patients with motor disorders. The knees are the lower limb joints exposed to major tension during human locomotion, presenting higher risk of a wider range of possible disorders. The devices used to monitor human joints should be comfortable and not restrain patients’ movement, while maintaining their resolution and accuracy. Most of current measurement techniques are based on electronic devices, which are often not adequate for demanding environments, such as the context of physical rehabilitation. We propose an e-Health sensing solution to dynamically monitor human knee angles during gait, using low-cost intrinsic Fabry-Perot interferometers optical fiber sensors (FPI-OFS). To the best of our knowledge, no previous efforts have reported the use of FPI sensors for such dynamic monitoring. The overall sensor consists of an optical fiber containing the FPI microcavity, which is embedded along the longitudinal direction of a kinesio tape (K-Tape), and placed along the knee rotation axis. Since the K-Tape has great adhesion to the skin, the FPI sensor is kept at the knee rotation axis, without restricting the user’s movements. During the knee flexion/extension, the K-Tape extends/compresses accordingly, resulting in the modulation of the reflected spectrum by the FPI-OFS. Several calibration and performance tests have been performed. Their results show the reliability and accuracy of the proposed solution, with sensibilities values of 53.8±2.4 pm/°.

Citation Download Citation

M. Fátima Domingues, Ana Nepomuceno, Cátia Tavares, Nélia Alberto, Ayman Radwan, Paulo André, and Paulo Antunes "Low-cost intrinsic optical fiber FPI sensor for knee kinematic gait analysis and e-Health architecture", Proc. SPIE 11028, Optical Sensors 2019, 1102820 (11 April 2019); https://doi.org/10.1117/12.2520877

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Gait analysis

Optical fibers

Kinematics

Calibration

Data acquisition

Fiber optics sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years