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Strain sensor based on embedded fiber Bragg grating in thermoplastic polyurethane using the 3D printing technology for improved sensitivity

Strain sensor based on embedded fiber Bragg grating in thermoplastic polyurethane using the 3D printing technology for improved sensitivity
Strain sensor based on embedded fiber Bragg grating in thermoplastic polyurethane using the 3D printing technology for improved sensitivity

A new and easy-to-fabricate strain sensor has been developed, based on fiber Bragg grating (FBG) technology embedded into a thermoplastic polyurethane filament using a 3-dimensional (3D) printer. Taking advantage of the flexibility and elastic properties of the thermoplastic polyurethane material, the embedding of the FBG provides durable protection with enhanced flexibility and sensitivity, as compared to the use of a bare FBG. Results of an evaluation of its performance have shown that the FBG sensors embedded in this way can be applied effectively in the measurement of strain, with an average wavelength responsivity of 0.013 5 nm/cm of displacement for tensile strain and −0.014 2 nm/cm for compressive strain, both showing a linearity value of up to 99%. Furthermore, such an embedded FBG-based strain sensor has a sensitivity of ∼1.74 times greater than that of a bare FBG used for strain measurement and is well protected and suitable for in-the-field use. It is also observed that the thermoplastic polyurethane based (TPU-based) FBG strain sensor carries a sensitivity value of ∼2.05 times higher than that of the polylactic acid based (PLA-based) FBG strain sensor proving that TPU material can be made as the material of choice as a “sensing” pad for the FBG.

3D printing technology, fiber Bragg grating, Fiber-optic sensors, multiple-point strain measurement
1674-9251
Ahmad, Harith
1d8a8135-0934-472a-848a-a5793f4f9c61
Alias, Mohamad Ashraff
572a6cc7-0b9a-479c-a7eb-29f0d8bfd808
Ismail, Mohammad Faizal
2e29d35e-186a-4fee-a469-d6f6acdb484e
Ismail, Nor Najwa
7de2792d-d4e7-4a1d-b590-c12de3593a67
Zaini, Muhammad Khairol Annuar
1f1390f4-3677-4509-98f5-3a0d17bc1e46
Lim, Kok Sing
2d088191-6801-4436-96b9-834c16a323cd
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Grattan, Kenneth T.V.
e434740d-2eca-42f5-8361-c7205863c8d8
Rahman, B. M.Azizur
78be29bb-612f-45e9-b147-6f6dc9da687c
Ahmad, Harith
1d8a8135-0934-472a-848a-a5793f4f9c61
Alias, Mohamad Ashraff
572a6cc7-0b9a-479c-a7eb-29f0d8bfd808
Ismail, Mohammad Faizal
2e29d35e-186a-4fee-a469-d6f6acdb484e
Ismail, Nor Najwa
7de2792d-d4e7-4a1d-b590-c12de3593a67
Zaini, Muhammad Khairol Annuar
1f1390f4-3677-4509-98f5-3a0d17bc1e46
Lim, Kok Sing
2d088191-6801-4436-96b9-834c16a323cd
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Grattan, Kenneth T.V.
e434740d-2eca-42f5-8361-c7205863c8d8
Rahman, B. M.Azizur
78be29bb-612f-45e9-b147-6f6dc9da687c

Ahmad, Harith, Alias, Mohamad Ashraff, Ismail, Mohammad Faizal, Ismail, Nor Najwa, Zaini, Muhammad Khairol Annuar, Lim, Kok Sing, Brambilla, Gilberto, Grattan, Kenneth T.V. and Rahman, B. M.Azizur (2022) Strain sensor based on embedded fiber Bragg grating in thermoplastic polyurethane using the 3D printing technology for improved sensitivity. Photonic Sensors, 12 (3), [220302]. (doi:10.1007/s13320-021-0646-1).

Record type: Article

Abstract

A new and easy-to-fabricate strain sensor has been developed, based on fiber Bragg grating (FBG) technology embedded into a thermoplastic polyurethane filament using a 3-dimensional (3D) printer. Taking advantage of the flexibility and elastic properties of the thermoplastic polyurethane material, the embedding of the FBG provides durable protection with enhanced flexibility and sensitivity, as compared to the use of a bare FBG. Results of an evaluation of its performance have shown that the FBG sensors embedded in this way can be applied effectively in the measurement of strain, with an average wavelength responsivity of 0.013 5 nm/cm of displacement for tensile strain and −0.014 2 nm/cm for compressive strain, both showing a linearity value of up to 99%. Furthermore, such an embedded FBG-based strain sensor has a sensitivity of ∼1.74 times greater than that of a bare FBG used for strain measurement and is well protected and suitable for in-the-field use. It is also observed that the thermoplastic polyurethane based (TPU-based) FBG strain sensor carries a sensitivity value of ∼2.05 times higher than that of the polylactic acid based (PLA-based) FBG strain sensor proving that TPU material can be made as the material of choice as a “sensing” pad for the FBG.

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s13320-021-0646-1 - Version of Record
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e-pub ahead of print date: 18 January 2022
Additional Information: This work was financially supported by a Newton Fund Impact Scheme under the Newton-Ungku Omar Fund Partnership (Grant No. IF022-2020). The grant is funded by the UK Department for Business, Energy and Industrial Strategy and Malaysian Industry-Government Group for High Technology (MIGHT) and delivered by the British Council and MIGHT. The authors are also pleased to acknowledge the support from University of Malaya (Grant Nos. RK021-2019 and TOP100PRC). Grattan also acknowledges the support from the Royal Academy of Engineering.
Keywords: 3D printing technology, fiber Bragg grating, Fiber-optic sensors, multiple-point strain measurement

Identifiers

Local EPrints ID: 471062
URI: http://eprints.soton.ac.uk/id/eprint/471062
ISSN: 1674-9251
PURE UUID: 3fa46c4b-6a33-462a-9782-9907108de2e8
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 25 Oct 2022 16:37
Last modified: 28 Oct 2022 01:43

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Contributors

Author: Harith Ahmad
Author: Mohamad Ashraff Alias
Author: Mohammad Faizal Ismail
Author: Nor Najwa Ismail
Author: Muhammad Khairol Annuar Zaini
Author: Kok Sing Lim
Author: Kenneth T.V. Grattan
Author: B. M.Azizur Rahman

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