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Special Issue "Fiber Bragg Grating Based Sensors and Systems"

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 30 September 2020.

Special Issue Editor

Prof. Dr. Oleg G. Morozov
Website
Guest Editor
Kazan National Research Technical University n.a. A.N. Tupolev-KAI, Russia
Interests: fiber optic, sensors; fiber bragg grating; adressable FBG; microwave photonic interrogation
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Today, no one doubts that fiber Bragg gratings (FBGs) have become the most used tool for measuring various physical parameters, the structural integrity of engineering systems, and biological activity of living systems. Classical approaches to measurements based on temperature and mechanical deformations and changes in the refractive index of the surrounding sensor environment are actively developing. New measurement principles are emerging based, for example, on physical changes in the length of the grating. The search for ways to simplify and reduce the price of FBG interrogation systems on the one hand, and improve their metrological characteristics on the other, is ongoing. One of the winning directions of these studies is the transition to microwave photonics measurement systems, which have been developed on the basis of schemes of optoelectronic generators, frequency mapping, probing using multifrequency laser radiation with difference frequencies lying in the microwave range, and comb generators. The second promising direction is the development and creation of addressable FBGs, the use of which makes it possible to increase the efficiency of processing measurement data and provides the ability to visualize quasidistributed sensors and map their readings.

 Bearing this in mind, this issue is dedicated, but not limited, to the following issues:

  • Modeling and simulation of FBGs;
  • Fabrication of FBGs;
  • Multiparameter FBG sensors;
  • Addressable FBGs;
  • Nonsymmetrical FBGs;
  • Special type of FBG sensors with one or multiplicative phase shifts;
  • Sensors on chirped, tilted, superstructured, etc. FBGs;
  • Нigh-speed optoelectronic interrogation methods;
  • Microwave photonics interrogation methods;
  • FBG sensors in dynamic measurements;
  • FBG sensors in quasistatic measurements;
  • FBGs in optical fibers of different classes;
  • FBG sensors in DTS, DTSS, and DAS systems;
  • FBG sensor on-board applications;
  • FBG sensors in medicine and living systems monitoring;
  • Biological FBG sensors;
  • Integration and packaging of FBGs in technical and living systems;
  • Application of FPI sensors, based on FBGs;
  • Dual nature of FBGs as elements of sensor and telecommunication systems;
  • Transfer of FBG characterization methods on different optical resonance structures;
  • Transfer of FBG principles in microwave range.

We hope that the works published in this Special Issue will confirm the fundamental importance of the FBG invention and their comprehensive application in all areas of human activity, as well as open up new prospects for the creation and application of FBGs as quanta of various cyberphysical systems.

Prof. Dr. Oleg G. Morozov
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

Open AccessArticle
Wearable Hand Module and Real-Time Tracking Algorithms for Measuring Finger Joint Angles of Different Hand Sizes with High Accuracy using FBG Strain Sensor
Sensors 2020, 20(7), 1921; https://doi.org/10.3390/s20071921 - 30 Mar 2020
Abstract
This paper presents a wearable hand module which was made of five fiber Bragg grating (FBG) strain sensor and algorithms to achieve high accuracy even when worn on different hand sizes of users. For real-time calculation with high accuracy, FBG strain sensors move [...] Read more.
This paper presents a wearable hand module which was made of five fiber Bragg grating (FBG) strain sensor and algorithms to achieve high accuracy even when worn on different hand sizes of users. For real-time calculation with high accuracy, FBG strain sensors move continuously according to the size of the hand and the bending of the joint. Representatively, four algorithms were proposed; point strain (PTS), area summation (AREA), proportional summation (PS), and PS/interference (PS/I or PS/I_α). For more accurate and efficient assessments, 3D printed hand replica with different finger sizes was adopted and quantitative evaluations were performed for index~little fingers (77 to 117 mm) and thumb (68~78 mm). For index~little fingers, the optimized algorithms were PS and PS/I_α. For thumb, the optimized algorithms were PS/I_α and AREA. The average error angle of the wearable hand module was observed to be 0.47 ± 2.51° and mean absolute error (MAE) was achieved at 1.63 ± 1.97°. These results showed that more accurate hand modules than other glove modules applied to different hand sizes can be manufactured using FBG strain sensors which move continuously and algorithms for tracking this movable FBG sensors. Full article
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors and Systems)
Open AccessArticle
Experimental Study on Glaze Icing Detection of 110 kV Composite Insulators Using Fiber Bragg Gratings
Sensors 2020, 20(7), 1834; https://doi.org/10.3390/s20071834 - 26 Mar 2020
Abstract
Icing detection of composite insulators is essential for the security and stability of power grids. As conventional methods have met difficulties in harsh weather, a 110 kV composite insulator with embedded Fiber Bragg Gratings (FBGs) was proposed for detecting glaze icing in this [...] Read more.
Icing detection of composite insulators is essential for the security and stability of power grids. As conventional methods have met difficulties in harsh weather, a 110 kV composite insulator with embedded Fiber Bragg Gratings (FBGs) was proposed for detecting glaze icing in this paper. FBG temperature compensation sensors in ceramic tubes were adopted for simultaneous measurement of icicle loads and temperature. Then, temperature calibration experiments and simulated icicle load experiments were carried out to obtain temperature and icicle load characteristics of FBGs. The results showed that temperature sensitivities of FBG strain sensors and FBG temperature compensation sensors were 18.16 pm/°C, and 13.18 pm/°C, respectively. Besides, wavelength shifts were linearly related to icicle loads within the polar angle range of −60° to 60°, and the load coefficient of FBG facing the icicle was -34.6 pm/N. In addition, the wavelength shift generated by several icicles was equal to the sum of wavelength shifts generated by each icicle within the polar angle range of −15° to 15°. Finally, icicles can cause wavelength shifts of FBGs within a big shed spacing. The paper provides a novel icing detection technology for composite insulators in transmission lines. Full article
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors and Systems)
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