Fiber Bragg grating differential strain sensor

Kaczmarek, Cezary; Kaczmarek, Tomasz; Kaczmarek, Z.

doi:10.1109/cadsm.2003.1255019

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Since the grating reacts to changes in deformation and temperature by shifting the Bragg wavelength, according to Equation (2), it can be assumed that the parameters P 1 and P 2 , on the basis of which the values under consideration are determined, will be shifts of the Bragg wavelength; for example, a system of two gratings at the output ∆λ B1 and at the output ∆λ B2 . In this situation, a differential system can be used in which the Bragg wavelength shift of two gratings ∆λ B1 and ∆λ B2 is used due to temperature changes [37], deformation [38], force [39] or dispersion [40]. Measurements of two different Bragg wavelengths are also used [41].…”

Section: Resultsmentioning

confidence: 99%

Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring

et al. 2023

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Road infrastructure is a key public asset because it benefits the social and economic development of any country. It plays an important role in the development of the industrial complex and the production sector, and the surfaces of transport roads should be of high quality and have a long service life. Road infrastructure, like all infrastructure, requires preservation, maintenance and repair. There are special requirements for roadways that must be observed during construction or repair. The uncertainty of the composition, temperature sensitivity and viscoelastic characteristics of road materials make the structural analysis of pavement very difficult compared to other civil structures, such as bridges, tunnels and buildings. For this reason, the question of how to improve fiber sensors based on fiber Bragg grating (FBG) arose. The novelty of this study is to modernize fiber sensors based on FBG so that they display deformation, stress and displacement, temperature and other parameters with much greater accuracy, which would provide a reliable scientific basis for modifying the theory, as well as the use of a fiber sensor based on FBG for simultaneous measurement of deformation and temperature when monitoring the road surface. This article is devoted to a detailed study of the use of fiber-optic sensors (FOS) based on fiber Bragg grating for road surface monitoring. Such a fiber sensor, consisting of a fiber Bragg grating and a pair of grids, can offer the possibility of simultaneous measurement of deformation and temperature for monitoring the pavement. Temperature and deformation measurements were carried out by installing a sensor on the surface of a made asphalt sample. The built-in fiber sensor based on FBG provides important information about how the pavement structure can withstand the load and subsidence of soil and implement road safety and stability measures in a timely manner to evaluate and predict the service life of the pavement. The results of the study showed that the synchronicity, repeatability and linearity of the characteristics of the fiber sensor are excellent. The difference between the experimental and theoretical results was about 7%. Thus, based on the results of the obtained data, the fiber sensor on the FBG can be used for monitoring and designing road surfaces and in general transport infrastructure.

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Section: Resultsmentioning

confidence: 99%

Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring

et al. 2023

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“…Their preliminary computer modelling data suggested that, depending on the configuration at both chiral centres, these should stand for either VIa or VIb -turn mimetics. In contrast with a tetrazole replacement for the peptide bond (Zabrocki et al, 1988), the pyroglutamic acid derivatives are more rigid (Kaczmarek, 2003). Moreover, their carboxylic acid group could be either a donor or an acceptor of hydrogen bonds, without affecting the polypeptide main-chain amide moieties.…”

Section: Commentmentioning

confidence: 99%

(2S,4R)-1-Benzyl 2-tert-butyl 4-[N,N′-bis(tert-butyloxycarbonyl)hydrazino]-5-oxopyrrolidine-1,2-dicarboxylate

2005

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“…Polymer composites offer the opportunity to modify the separate components, in conformity with the requirements of the application. Composites made of synthetic polymers and natural organic fi llers such as wood fl our, wood fi bres, agricultural plant wastes and lignin are used frequently [1][2][3][4][5][6][7][14][15][16][17][18][19][20] . Their advantages are their sustainability and the possibility of using waste products from wood harvesting and manufacture.…”

Section: Introductionmentioning

confidence: 99%

“…The positive effect of using these materials involves reduced wear on the manufacturing equipment, wood-like appearance, lightweight and reduced cost 4,5 . To improve the fi ller's compatibility with the polymer and the mechanical properties of the composites, it is advisable that the fi llers should be modifi ed in advance [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Modification of Wood Flour with Maleic Anhydride for Manufacture of Wood-Polymer Composites

Nenkova

Dobrilova

Natov

et al. 2006

Polymers and Polymer Composites

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Composites consisting of synthetic polymers and natural organic fillers have many applications. Plant-based materials, particularly wood, are used as fillers. Most frequently they are added to the polymer in the shape of wood flour or wood fibres. This type of polymer composite allows the possibility of modifying the components in accordance with the requirements of the application. Modifications to wood flour (WF) were carried out with a 10% solution of maleic anhydride (MA) in acetone in the presence of benzoyl peroxide and dicumene hydroperoxide. Lignin and cellulose were isolated from the WF and modified by the same method as the WF. They were characterized by Fourier Transform infrared spectroscopy and it was proved that there was a chemical reaction between the wood components and MA. This was confirmed by chemical analysis and by a determination of the hydroxyl groups in unmodified and modified WF. Composites of polypropylene and modified WF were obtained and studied by scanning electron microscopy, transmission electron microscopy, dynamic mechanical analysis and mechanical tests. They showed an improvement in adhesion between the polymer and the modified WF

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Fiber Bragg grating differential strain sensor

Cited by 5 publications

References 3 publications

Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring

Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring

(2S,4R)-1-Benzyl 2-tert-butyl 4-[N,N′-bis(tert-butyloxycarbonyl)hydrazino]-5-oxopyrrolidine-1,2-dicarboxylate

Modification of Wood Flour with Maleic Anhydride for Manufacture of Wood-Polymer Composites

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