On the use of a compact optical fiber sensor system in aircraft structural health monitoring

Abstract— Optical fiber sensor is attracting more attention in the structural health monitoring of civil applications. A general interrogator which can be used for both SOFO and fiber Bragg grating (FBG) sensors has been proposed, it has a lower cost with a much simpler design. Its accuracy can reach up to ~2.5 με, it has a niche market where it can compete with the conventional sensors.

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Hybrid optical fiber sensor system based on fiber Bragg gratings and plastic optical fibers for health monitoring of engineering structures

10.1117/12.657834 ◽

2006 ◽

Cited By ~ 1

Author(s):

K. S. C. Kuang ◽

M. Maalej ◽

S. T. Quek

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Health Monitoring ◽

Optical Fiber Sensor ◽

Fiber Bragg Gratings ◽

Bragg Gratings ◽

Sensor System ◽

Fiber Sensor ◽

Engineering Structures ◽

Plastic Optical Fibers

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A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Sensors ◽

10.3390/s21051818 ◽

2021 ◽

Vol 21 (5) ◽

pp. 1818

Author(s):

Mattia Francesco Bado ◽

Joan R. Casas

Keyword(s):

Structural Health Monitoring ◽

Optical Fiber ◽

Health Monitoring ◽

Optical Fiber Sensors ◽

Vibration Monitoring ◽

Fiber Sensors ◽

Structural Health ◽

Comprehensive Collection ◽

Monitoring Tools ◽

Distributed Optical Fiber

The present work is a comprehensive collection of recently published research articles on Structural Health Monitoring (SHM) campaigns performed by means of Distributed Optical Fiber Sensors (DOFS). The latter are cutting-edge strain, temperature and vibration monitoring tools with a large potential pool, namely their minimal intrusiveness, accuracy, ease of deployment and more. Its most state-of-the-art feature, though, is the ability to perform measurements with very small spatial resolutions (as small as 0.63 mm). This review article intends to introduce, inform and advise the readers on various DOFS deployment methodologies for the assessment of the residual ability of a structure to continue serving its intended purpose. By collecting in a single place these recent efforts, advancements and findings, the authors intend to contribute to the goal of collective growth towards an efficient SHM. The current work is structured in a manner that allows for the single consultation of any specific DOFS application field, i.e., laboratory experimentation, the built environment (bridges, buildings, roads, etc.), geotechnical constructions, tunnels, pipelines and wind turbines. Beforehand, a brief section was constructed around the recent progress on the study of the strain transfer mechanisms occurring in the multi-layered sensing system inherent to any DOFS deployment (different kinds of fiber claddings, coatings and bonding adhesives). Finally, a section is also dedicated to ideas and concepts for those novel DOFS applications which may very well represent the future of SHM.

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A Multiplexed Optical Fiber Sensor System For Distributed Measurement Of Structural Strains

MRS Proceedings ◽

10.1557/proc-503-119 ◽

1997 ◽

Vol 503 ◽

Author(s):

F. Ansari ◽

Z. Chen ◽

Q. Li

Keyword(s):

Optical Fiber ◽

Optical Switch ◽

Optical Fiber Sensor ◽

Fiber Material ◽

Smart Structure ◽

Sensor System ◽

Fiber Sensor ◽

Fiber Sensors ◽

Large Structures ◽

Distributed Measurement

ABSTRACTStructurally integrated optical fiber sensors form the basis for smart structure technology. Over the past decade a variety of sensor configurations have been developed for measurement of strains and deformations in structures. Strains and deformations alter the refractive index and the geometry of the optical fiber material. These changes perturb the intensity, phase, and polarization of the light-wave propagating along the probing fiber. The optical perturbations are detected for the determination of strain. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. An optical switch provides for multiplexing of strain signals from various locations in the structure. Redundant Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.

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