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Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics

We propose a sensor design for measurement of large strains where direct application of a fiber optic strain gauge is impossible due to the stiffness mismatch between the optical fiber and the structure under test. The sensor design is based on a rhombus type compliant mechanism, which functions to...

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Autores principales: Shiryayev, Oleg, Vahdati, Nader, Yap, Fook Fah, Butt, Haider
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182844/
https://www.ncbi.nlm.nih.gov/pubmed/35684610
http://dx.doi.org/10.3390/s22113987
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author Shiryayev, Oleg
Vahdati, Nader
Yap, Fook Fah
Butt, Haider
author_facet Shiryayev, Oleg
Vahdati, Nader
Yap, Fook Fah
Butt, Haider
author_sort Shiryayev, Oleg
collection PubMed
description We propose a sensor design for measurement of large strains where direct application of a fiber optic strain gauge is impossible due to the stiffness mismatch between the optical fiber and the structure under test. The sensor design is based on a rhombus type compliant mechanism, which functions to attenuate input strain and transfer it to the ends of the sensing beam with the mounted optical strain gauge. We developed an analytical model of the sensor, which allows us to relate actuation forces, input displacement/strain, and output strain. The analytical model was verified with the finite element analysis and validated against an experimental prototype. The prototype sensor was able to handle input strains exceeding ±2.5 × 10(5) µε. Potential application areas of the proposed sensor include compliant elastomeric structures, wearables, and soft robotics.
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spelling pubmed-91828442022-06-10 Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics Shiryayev, Oleg Vahdati, Nader Yap, Fook Fah Butt, Haider Sensors (Basel) Article We propose a sensor design for measurement of large strains where direct application of a fiber optic strain gauge is impossible due to the stiffness mismatch between the optical fiber and the structure under test. The sensor design is based on a rhombus type compliant mechanism, which functions to attenuate input strain and transfer it to the ends of the sensing beam with the mounted optical strain gauge. We developed an analytical model of the sensor, which allows us to relate actuation forces, input displacement/strain, and output strain. The analytical model was verified with the finite element analysis and validated against an experimental prototype. The prototype sensor was able to handle input strains exceeding ±2.5 × 10(5) µε. Potential application areas of the proposed sensor include compliant elastomeric structures, wearables, and soft robotics. MDPI 2022-05-24 /pmc/articles/PMC9182844/ /pubmed/35684610 http://dx.doi.org/10.3390/s22113987 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shiryayev, Oleg
Vahdati, Nader
Yap, Fook Fah
Butt, Haider
Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title_full Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title_fullStr Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title_full_unstemmed Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title_short Compliant Mechanism-Based Sensor for Large Strain Measurements Employing Fiber Optics
title_sort compliant mechanism-based sensor for large strain measurements employing fiber optics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182844/
https://www.ncbi.nlm.nih.gov/pubmed/35684610
http://dx.doi.org/10.3390/s22113987
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