Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring
Using fiber optics as a tool for different kinds of geotechnical monitoring can be highly attractive and cost-effective when compared to conventional instruments, such as piezometers and inclinometers, among others. A single fiber optic cable may cover a larger monitoring area compared to convention...
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| Format: | Article |
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MDPI AG
2025-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/2/324 |
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| author | Rodrigo Moraes da Silveira Marcelo Buras André Luiz Delmondes Pereira Filho Juliana Ferreira Fernandes Marcos Massao Futai |
| author_facet | Rodrigo Moraes da Silveira Marcelo Buras André Luiz Delmondes Pereira Filho Juliana Ferreira Fernandes Marcos Massao Futai |
| author_sort | Rodrigo Moraes da Silveira |
| collection | DOAJ |
| description | Using fiber optics as a tool for different kinds of geotechnical monitoring can be highly attractive and cost-effective when compared to conventional instruments, such as piezometers and inclinometers, among others. A single fiber optic cable may cover a larger monitoring area compared to conventional instrumentation and allows for monitoring more than one physical quantity with the same fiber optic cable. The literature provides several different examples of distributed fiber optic systems usage. For using any sensor, a calibration curve and parameters are required. In the case of strain sensors, calibration is required to derive strain values from the frequency measurement quantity. However, fiber optic sensor cable manufacturers do not often provide cable calibration parameters, and researchers should consult the specialized literature. This article thus presents a bench adjusted for tests with single-mode fiber optic cables, as well as results of tensile tests for defining the function of strain variations in two different optical fiber cables manufactured by different companies using two different distributed interrogators. This paper also proposes a methodology for calibrating fiber optic cable deformation. A few manufacturers of fiber optic cables aim at civil engineering applications. Therefore, we propose a calibration methodology to show the possibility of obtaining calibration parameters of any fiber optic cable, even those manufactured for telecommunications purposes and not only for cables manufactured for civil engineering use. Thus, researchers will not be restricted to the acquisition of special cables for their applications. The results allowed us to conclude that the application of calibrated fiber optic sensors to experimental pile foundations permits the evaluation of the load–displacement behavior of these elements under different loading conditions. |
| format | Article |
| id | doaj-art-054603141fa94696ab646eecf1521880 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-054603141fa94696ab646eecf15218802025-01-24T13:48:31ZengMDPI AGSensors1424-82202025-01-0125232410.3390/s25020324Laboratory Tests Using Distributed Fiber Optical Sensors for Strain MonitoringRodrigo Moraes da Silveira0Marcelo Buras1André Luiz Delmondes Pereira Filho2Juliana Ferreira Fernandes3Marcos Massao Futai4Civil Construction Department, Polytechnic Center, Federal University of Parana, Curitiba 80530-000, BrazilInstitute of Technology for Development, Curitiba 80215-090, BrazilCivil Engineering Department, Polytechnic School, University of Sao Paulo, São Paulo 05508-220, BrazilCivil Engineering Department, Polytechnic School, University of Sao Paulo, São Paulo 05508-220, BrazilCivil Engineering Department, Polytechnic School, University of Sao Paulo, São Paulo 05508-220, BrazilUsing fiber optics as a tool for different kinds of geotechnical monitoring can be highly attractive and cost-effective when compared to conventional instruments, such as piezometers and inclinometers, among others. A single fiber optic cable may cover a larger monitoring area compared to conventional instrumentation and allows for monitoring more than one physical quantity with the same fiber optic cable. The literature provides several different examples of distributed fiber optic systems usage. For using any sensor, a calibration curve and parameters are required. In the case of strain sensors, calibration is required to derive strain values from the frequency measurement quantity. However, fiber optic sensor cable manufacturers do not often provide cable calibration parameters, and researchers should consult the specialized literature. This article thus presents a bench adjusted for tests with single-mode fiber optic cables, as well as results of tensile tests for defining the function of strain variations in two different optical fiber cables manufactured by different companies using two different distributed interrogators. This paper also proposes a methodology for calibrating fiber optic cable deformation. A few manufacturers of fiber optic cables aim at civil engineering applications. Therefore, we propose a calibration methodology to show the possibility of obtaining calibration parameters of any fiber optic cable, even those manufactured for telecommunications purposes and not only for cables manufactured for civil engineering use. Thus, researchers will not be restricted to the acquisition of special cables for their applications. The results allowed us to conclude that the application of calibrated fiber optic sensors to experimental pile foundations permits the evaluation of the load–displacement behavior of these elements under different loading conditions.https://www.mdpi.com/1424-8220/25/2/324distributed fiber opticstensile testssingle-mode fiber |
| spellingShingle | Rodrigo Moraes da Silveira Marcelo Buras André Luiz Delmondes Pereira Filho Juliana Ferreira Fernandes Marcos Massao Futai Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring Sensors distributed fiber optics tensile tests single-mode fiber |
| title | Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring |
| title_full | Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring |
| title_fullStr | Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring |
| title_full_unstemmed | Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring |
| title_short | Laboratory Tests Using Distributed Fiber Optical Sensors for Strain Monitoring |
| title_sort | laboratory tests using distributed fiber optical sensors for strain monitoring |
| topic | distributed fiber optics tensile tests single-mode fiber |
| url | https://www.mdpi.com/1424-8220/25/2/324 |
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