Nursing Movement Monitoring System Utilizing Hetero-core Fiber Optic Sensors Embedded in Medical Thin Films

2018 ◽  
Vol 138 (12) ◽  
pp. 525-532
Author(s):  
Masahiko Ito ◽  
Yuya Koyama ◽  
Michiko Nishiyama ◽  
Emi Yanagisawa ◽  
Mariko Hayashi ◽  
...  
Keyword(s):  
Thin Films ◽  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Core Fiber ◽  
Movement Monitoring

scholarly journals MATHEMATICAL JUSTIFICATION OF FIBER SENSORS BASED ON FIBER BRAGG GRATINGS

2021 ◽  
Vol 117 (2) ◽  
pp. 129-135
Author(s):  
Waldemar Wójcik
Keyword(s):  
Monitoring System ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Fiber Optic ◽  
Spectral Characteristics ◽  
Fiber Optic Sensors ◽  
Fiber Gratings ◽  
Fiber Sensors ◽  
Bragg Fiber

Nowadays, the most promising approach is the use of fiber-optic sensors as a key element of the monitoring system. Fiber-optic sensors (FOS) have a number of advantages, the most important of which include immunity to electromagnetic interference, low weight and the possibility of their inclusion in the measured structure. The use of such sensors in the monitoring system will make it possible to simplify the measurement and obtain reliable data, as well as to obtain all new possibilities for measuring various quantities simultaneously.The most perspective are the sensors based on the Bragg fiber gratings. Bragg fiber gratings have several advantages, for instance, they allow creating the distributed measuring massifs, which contain several sensors. As well, they are insensitive to the optic power source vibrations. Variety of using the fiber sensors based on the Bragg fiber gratings has led to producing the Bragg fiber gratings with different spectral characteristics.The article herein considers the issues of the Bragg fiber gratings mathematical modeling using the transfer matrix method. Transfer matrix method allows defining the optical components spectral characteristics based on the bound modes theory and description of electromagnetic wave, passing through an optic fiber. In the article there have been analyzed the Bragg fiber gratings in compliance with spectral features, such as transmission and reflectance spectra.

scholarly journals Monitoring of Large Diameter Sewage Collector Strengthened with Glass-Fiber Reinforced Plastic (GRP) Panels by Means of Distributed Fiber Optic Sensors (DFOS)

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6607
Author(s):  
Paweł Popielski ◽  
Bartosz Bednarz ◽  
Rafał Sieńko ◽  
Tomasz Howiacki ◽  
Łukasz Bednarski ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Monitoring System ◽  
Fiber Optic ◽  
Large Diameter ◽  
Fiber Optic Sensors ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

Diagnostics and assessment of the structural performance of collectors and tunnels require multi-criteria as well as comprehensive analyses for improving the safety based on acquired measurement data. This paper presents the basic goals for a structural health monitoring system designed based on distributed fiber optic sensors (DFOS). The issue of selecting appropriate sensors enabling correct strain transfer is discussed hereafter, indicating both limitations of layered cables and advantages of sensors with monolithic cross-section design in terms of reliable measurements. The sensor’s design determines the operation of the entire monitoring system and the usefulness of the acquired data for the engineering interpretation. The measurements and results obtained due to monolithic DFOS sensors are described hereafter on the example of real engineering structure—the Burakowski concrete collector in Warsaw during its strengthening with glass-fiber reinforced plastic (GRP) panels.

scholarly journals Fiber Optic Sensors for Damage Detection in Composite Materials

1997 ◽  
Author(s):  
Anand Asundi
Keyword(s):  
Composite Materials ◽  
Damage Detection ◽  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Design Rules ◽  
Interferometric Sensors ◽  
On Line ◽  
Proper Design

An absence of proper design rules has limited the application of composite materials to specific areas. However, within these application areas there is still a need to regular monitor the component resulting in significant downtime and loss of revenue. To overcome this it is proposed to have an on-line monitoring system capable of global checking of the component. Fiber optic polarimetric sensors are chosen in this study to globally characterize the health of a component. Polarimetric sensors have better sensitivity than intensity sensors and at the same time are more rugged than interferometric sensors. In this study, the effect of debonds and fiber breakages are investigated in composite bend specimens.

Monitoring system of hydraulic lifting device based on the fiber optic sensors

2017 ◽  
Author(s):  
Jan Nedoma ◽  
Martin Novák ◽  
Radek Martinek ◽  
Vladimír Vašinek ◽  
Marcel Fajkus ◽  
...  
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors

scholarly journals Using distributed fiber optic sensors to monitor underground infrastructure

2020 ◽  
Vol 15 (3) ◽  
pp. 697-704
Author(s):  
B. Bednarz ◽  
P. Popielski
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
System Technology ◽  
Preliminary Results ◽  
Proper Functioning ◽  
Underground Infrastructure ◽  
Thin Walled

Abstract The development of monitoring system technology enables more accurate measurement at regular intervals of many parameters affecting the safety and proper functioning of underground infrastructure. Means of monitoring underground infrastructure using distributed fiber optic sensors (DFOS) are presented in this paper. DFOS use is developing rapidly and investment is increasingly visible internationally – examples are given. The preliminary results are also presented of research on the application of DFOS for monitoring pipeline deformation and thin-walled GRP (FRP) panels used in the renovation of existing sewage networks.

Non-invasive smart monitoring system based on multi-core fiber optic interferometers

2018 ◽  
Author(s):  
Shuyang Chen ◽  
Fengze Tan ◽  
Zhenyu Huang ◽  
Tianyu Yang ◽  
Jiajing Tu ◽  
...  
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Non Invasive ◽  
Core Fiber

U-Shaped Polymer Cladding and Hetero-Core Fiber Optic Sensors for Monitoring Scale Formation in Geothermal Brine

2020 ◽  
Vol 53 (13) ◽  
pp. 2160-2169 ◽  
Author(s):  
Takuya Okazaki ◽  
Ryuichi Seto ◽  
Tomoaki Watanabe ◽  
Akira Ueda ◽  
Hideki Kuramitz
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Scale Formation ◽  
Geothermal Brine ◽  
Core Fiber
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