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Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers
Regarding high-sensitivity human wrist joint motion monitoring in exercise rehabilitation; we develop a pair of novel wearable and sensitivity-enhanced plastic optical fiber (POF) strain sensors consisting of an etched grating fiber and a side-polished fiber stitched into a polyamide wrist brace. Th...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7436097/ https://www.ncbi.nlm.nih.gov/pubmed/32722071 http://dx.doi.org/10.3390/ma13153291 |
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author | Li, Jing Liu, Jian Li, Cheng Zhang, Hui Li, Yizuo |
author_facet | Li, Jing Liu, Jian Li, Cheng Zhang, Hui Li, Yizuo |
author_sort | Li, Jing |
collection | PubMed |
description | Regarding high-sensitivity human wrist joint motion monitoring in exercise rehabilitation; we develop a pair of novel wearable and sensitivity-enhanced plastic optical fiber (POF) strain sensors consisting of an etched grating fiber and a side-polished fiber stitched into a polyamide wrist brace. The two flexible and surface-treated fibers are; respectively; featured with an etched periodic gratings with a pitch of 6 mm and a depth of 0.5 mm and a D-shaped side-polished zone of ~300 µm depth and ~30 mm length; which, correspondingly, show the sensitivities of around 0.0176/° and 0.0167/° in a normalized bending angle by far larger than a conventional commercial POF, because it achieves a more sensitive strain-induced evanescent field interaction with the side-machined fibers. Moreover, in terms of the sensor response to bending deformation in the range of −40°~+40°, the former exhibits a better sensitivity in lower angle change, while the latter is superior as the bending angle increases; thereby arranging the two modified POFs separately at the side and back of the human wrist, in order to decouple the wrist joint behaviors induced by typical flexion-extension or abduction-adduction movements. Then, the circular and pentagonal wrist motion trajectory patterns are investigated, to demonstrate the maximum average single-axis motion error of 2.94° via the transformation of spatial angle to plane coordinate for the fabricated couple of POF sensors, which is lower than a recognized standard of 5°, thus suggesting the great potential in wearable exercise rehabilitation of human joints in the field of medical treatment and healing. |
format | Online Article Text |
id | pubmed-7436097 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-74360972020-08-24 Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers Li, Jing Liu, Jian Li, Cheng Zhang, Hui Li, Yizuo Materials (Basel) Article Regarding high-sensitivity human wrist joint motion monitoring in exercise rehabilitation; we develop a pair of novel wearable and sensitivity-enhanced plastic optical fiber (POF) strain sensors consisting of an etched grating fiber and a side-polished fiber stitched into a polyamide wrist brace. The two flexible and surface-treated fibers are; respectively; featured with an etched periodic gratings with a pitch of 6 mm and a depth of 0.5 mm and a D-shaped side-polished zone of ~300 µm depth and ~30 mm length; which, correspondingly, show the sensitivities of around 0.0176/° and 0.0167/° in a normalized bending angle by far larger than a conventional commercial POF, because it achieves a more sensitive strain-induced evanescent field interaction with the side-machined fibers. Moreover, in terms of the sensor response to bending deformation in the range of −40°~+40°, the former exhibits a better sensitivity in lower angle change, while the latter is superior as the bending angle increases; thereby arranging the two modified POFs separately at the side and back of the human wrist, in order to decouple the wrist joint behaviors induced by typical flexion-extension or abduction-adduction movements. Then, the circular and pentagonal wrist motion trajectory patterns are investigated, to demonstrate the maximum average single-axis motion error of 2.94° via the transformation of spatial angle to plane coordinate for the fabricated couple of POF sensors, which is lower than a recognized standard of 5°, thus suggesting the great potential in wearable exercise rehabilitation of human joints in the field of medical treatment and healing. MDPI 2020-07-24 /pmc/articles/PMC7436097/ /pubmed/32722071 http://dx.doi.org/10.3390/ma13153291 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Jing Liu, Jian Li, Cheng Zhang, Hui Li, Yizuo Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title | Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title_full | Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title_fullStr | Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title_full_unstemmed | Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title_short | Wearable Wrist Movement Monitoring Using Dual Surface-Treated Plastic Optical Fibers |
title_sort | wearable wrist movement monitoring using dual surface-treated plastic optical fibers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7436097/ https://www.ncbi.nlm.nih.gov/pubmed/32722071 http://dx.doi.org/10.3390/ma13153291 |
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