Effect of adhesive type on the sensitivity coefficient of FBG sensor bonded on the surface of CFRP

Tian, Heng; Liu, Dongguang; Wang, Yanping; Wang, Qinglin

doi:10.1007/s11801-019-8183-5

Cited by 13 publications

(5 citation statements)

References 11 publications

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“…This is highly undesired in many real applications, as for instance for monitoring microelectronic or chip devices 7,8 . While the effects of different kinds of glues for FBG sensing have been investigated in the literature [9][10][11] , in all cases the strain transfer provided by the glue would affect temperature sensing, making it difficult to reach strain-free thermal monitoring. On the other hand, removing glued FBG sensors from a structure might result in adhesive residuals that remain in the structure; this is normally unwanted in many cases.…”

Section: Geckomentioning

confidence: 99%

Gecko-inspired self-adhesive packaging for strain-free temperature sensing based on optical fibre Bragg gratings

Liu

Zhu

Xie

et al. 2023

Sci Rep

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The large development of fibre Bragg gratings (FBGs) over decades has made this kind of structures one of the most mature optical fibre sensing technologies existing today, demonstrating key features for a very wide range of applications. FBG sensors are fragile and must be normally protected for real-field applications, although challenging packaging designs are required to mitigate temperature-strain cross-sensitivity issues. Here, a polydimethylsiloxane (PDMS) packaging with a microarray structure that provides gecko-inspired dry adhesion is proposed for strain-free FBG-based temperature sensing. Besides offering protection, the PDMS packaging with an embedded polyamide capillary damps the mechanical strain transferred to the optical fibre, providing FBG-based temperature sensing with a negligible impact of strain. In addition, the microarray structure imprinted on one surface of the packaging provides gecko-inspired dry adhesion based on van der Waals forces. This feature enables the packaged optical fibre sensor to be attached and detached dynamically to nearly any kind of smooth surface, leaving no residuals in the monitored structure. Experimental results verify a fast and accurate temperature response of the sensor with highly mitigated impact of residual strain. The proposed packaged sensor can be used in application where glue is not allowed nor recommendable to be used.

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Section: Geckomentioning

confidence: 99%

Gecko-inspired self-adhesive packaging for strain-free temperature sensing based on optical fibre Bragg gratings

Liu

Zhu

Xie

et al. 2023

Sci Rep

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“…To construct the sensor system from the various 3D printed components, the commercial adhesive could then be applied to bond the FBG and the inner walls of both the TPU and the PLA materials, taking advantage of their ability to function well over a wide range of temperatures [33]. A PVC pipe was chosen as the extensometer body.…”

Section: A Extensometer Designmentioning

confidence: 99%

A High-Precision Extensometer System for Ground Displacement Measurement Using Fiber Bragg Grating

et al. 2022

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The design and performance of an innovative high-precision extensometer system, fabricated inexpensively using 3D printing technology, are discussed in this paper. In the development of the extensometer, an embedded Fiber Bragg Grating (FBG) strain sensor was 3D printed using a thermoplastic polyurethane (TPU) filament, which was used as the primary sensing element of the extensometer system, taking advantage of its excellent flexibility and high sensitivity to variations in localized strain. In the performance assessment carried out, the results obtained during the experimental test and validation have demonstrated that it could be used very effectively to measure strain variations, with an average wavelength responsivity of 0.0158 nm/cm (for displacement) and very high linearity (up to 99%). Furthermore, the protection integrated into the sensor systems design makes it well-suited for in-thefield applications, such as monitoring ground displacements which can lead to dangerous slippages of sloped earthworks. In addition, a field testing of the extensometer under simulated conditions has shown that a Fiber Bragg Grating (FBG)based approach could be applied effectively to the measurement of strain, offering a wavelength responsivity of 0.0012 nm/με (for strain-sensitive FBGs) under both dry and wet soil conditions. Moreover, taking advantage of the high (~99%) linearity, the extensometer is a reliable instrument for use in different underground conditions, creating an easy-to-use ground movement monitoring system which then enables an excellent representation of the displacement profile of the earth to be made.

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“…Son yıllarda da birçok çalışma FBG sensörlerinin gerinim transfer özellikleri üzerine odaklanmıştır. Sınırlı sayıdaki deneysel çalışmalarda, yapıştırıcının elastisite modülü, viskozitesi, kayma modülü (shear modulus), kalınlığı ve uzunluğu gibi parametrelerin ölçüm doğruluğuna etkileri üzerinde durulmuştur [5,6,[18][19][20].…”

Section: Fbg Sensöründe Gerinim Transferiunclassified

FBG Sensörlerin Yüzey Uygulamalarında Kullanılan Sabitleme Elemanlarının İncelenmesi ve Özgün Bir Tasarımın Geliştirilmesi

Eğin¹,

Unal²,

Günaydın³

2020

acperpro

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Fiber Bragg Izgara (Fiber Bragg Grating (FBG)) sens&ouml;rler k&uuml;&ccedil;&uuml;k olması, hafif olması, y&uuml;ksek hassasiyete sahip olması ve elektromanyetik girişimlerden etkilenmemesi gibi avantajları nedeniyle son yıllarda yoğun olarak kullanılmaya ve geliştirilmeye devam etmektedir. Doğrudan gerinim ve sıcaklık; dolaylı olarak ise basın&ccedil;, yer değiştirme, titreşim ve ivme gibi fiziksel parametreler &ouml;l&ccedil;&uuml;lebilmektedir. Gerinim ve sıcaklık parametrelerini elde etmek i&ccedil;in FBG sens&ouml;rlerin &ouml;l&ccedil;&uuml;m yapılacak malzemeyle bağlantı kurulması gerekmektedir. Bu bağlantı genel olarak iki y&ouml;ntem kullanılarak sağlanmaktadır. Bunlardan ilki y&uuml;zeye sabitlenmesi diğeri ise malzemeye g&ouml;m&uuml;lmesidir. Y&uuml;zeye sabitleme metotlarından bir tanesi sabitleyici eleman kullanmaktır. Sabitleyici eleman; sens&ouml;r&uuml;n kolay montaj edilmesi, dış ortamlardan korunması ve hassasiyetinin artması gibi avantajlar sağlamaktadır. Bu bildiride, farklı FBG sens&ouml;r sabitleyici elemanlarının &ouml;l&ccedil;&uuml;m hassasiyeti, sabitleyici boyutu, malzeme t&uuml;r&uuml;, sabitleme y&ouml;ntemi incelenmiş ve karşılaştırılmıştır. Yeni bir sabitleme elemanının tasarımı yapılmış ve sonlu elemanlar y&ouml;ntemiyle doğrulanmıştır.

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Effect of adhesive type on the sensitivity coefficient of FBG sensor bonded on the surface of CFRP

Cited by 13 publications

References 11 publications

Gecko-inspired self-adhesive packaging for strain-free temperature sensing based on optical fibre Bragg gratings

Gecko-inspired self-adhesive packaging for strain-free temperature sensing based on optical fibre Bragg gratings

A High-Precision Extensometer System for Ground Displacement Measurement Using Fiber Bragg Grating

FBG Sensörlerin Yüzey Uygulamalarında Kullanılan Sabitleme Elemanlarının İncelenmesi ve Özgün Bir Tasarımın Geliştirilmesi

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