Polymer optical fiber sensors for the civil infrastructure

Kiesel, Sharon; Vickle, Patrick Van; Peters, Kara; Abdi, O.; Hassan, Tasnim; Kowalsky, Mervyn J.

doi:10.1117/12.658885

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…In this section, we summarize the knowledge gained from three recent studies on POF sensors embedded in material systems; one in a concrete infrastructure system, one in a geotextile and the other in a glass fiber-epoxy laminate. Kiesel et al [31] investigated the suitability of singlemode POF sensors for in situ monitoring of civil infrastructure systems. Single-mode, PMMA POFs (diameter 115 μm) were partially embedded during casting of three typical civil structural materials: mortar, hydrostone, and cement paste.…”

Section: Pof Integration Into Materials Systemsmentioning

confidence: 99%

Polymer optical fiber sensors—a review

Peters¹

2010

Smart Mater. Struct.

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Polymer optical fibers (POFs) have significant advantages for many sensing applications, including high elastic strain limits, high fracture toughness, high flexibility in bending, high sensitivity to strain and potential negative thermo-optic coefficients. The recent emergence of single-mode POFs has enabled high precision, large deformation optical fiber sensors. This article describes recent advances in both multi-mode and single-mode POF based strain and temperature sensors. The mechanical and optical properties of POFs relevant to strain and temperature applications are first summarized. POFs considered include multi-mode POFs, solid core single-mode POFs and microstructured single-mode POFs. Practical methods for applying POF sensors, including connecting and embedding sensors in structural materials, are also described. Recent demonstrations of multi-mode POF sensors in structural applications based on new interrogation methods, including backscattering and time-of-flight measurements, are outlined. The phase-displacement relation of a single-mode POF undergoing large deformation is presented to build a fundamental understanding of the response of single-mode POF sensors. Finally, this article highlights recent single-mode POF based sensors based on polymer fiber Bragg gratings and microstructured POFs.

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Section: Pof Integration Into Materials Systemsmentioning

confidence: 99%

Polymer optical fiber sensors—a review

Peters¹

2010

Smart Mater. Struct.

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452

245

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“…Intrinsic polymer optical fibre (POF) sensors have great potential for large-strain applications such as health monitoring of civil infrastructure systems subjected to earthquake loading or structures with large shape changes such as morphing aircraft [1,2]. POFs provide a large elastic strain range, are more flexible than silica optical fibres, and are more durable in harsh chemical or environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of intrinsic polymer optical fibre sensor for large-strain applications

Kiesel

Peters

Hassan

et al. 2007

Meas. Sci. Technol.

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This paper derives the phase response of a single-mode polymer optical fibre for large-strain applications. The role of the finite deformation of the optical fibre and nonlinear strain optic effects are derived using a second order strain assumption and shown to be important at strain magnitudes as small as 1%. In addition, the role of the core radius change on the propagation constant is derived, but it is shown to be negligible as compared to the previous effects. It is shown that four mechanical and six opto-mechanical parameters must be calibrated to apply the sensor under arbitrary axial and transverse loading. The mechanical nonlinearity of a typical single-mode polymer optical fibre is experimentally measured in axial tension and is shown to be more significant than that of their silica counterpart. The mechanical parameters of the single-mode polymer optical fibre are also measured for a variety of strain rates, from which it is demonstrated that the strain rate has a strong influence on yield stress and strain. The calibrated constants themselves are less affected by strain rate.

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“…Due to this mismatch of mechanical properties between the optical fiber and the host material, sensor fracture and debonding before the host structure failure are commonly encountered in silica-based optical fiber structural health monitoring systems. To overcome this shortcoming of the silica-based optical fiber sensors, plastic optical fiber strain sensors are exploited for large strain measurement (Kiesel 2006, Kuang 2002. However, the length of the plastic optical fiber is limited to 100 meters due to its high optical loss and its multimode nature.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and evaluation of hybrid silica/polymer optical fiber sensors for large strain measurement

Huang

2007

SPIE Proceedings

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Silica-based optical fiber sensors are widely used in structural health monitoring systems for strain and deflection measurement. One drawback of silica-based optical fiber sensors is their low strain toughness. In general, silica-based optical fiber sensors can only reliably measure strains up to 2%. Recently, polymer optical fiber sensors have been employed to measure large strain and deflection. Due to their high optical losses, the length of the polymer optical fibers is limited to 100 meters. In this paper, we present a novel economical technique to fabricate hybrid silica/polymer optical fiber strain sensors for large strain measurement. First, stress analysis of a surface-mounted optical fiber sensor is performed to understand the load distribution between the host structure and the optical fiber in relation to their mechanical properties. Next, the procedure of fabricating a polymer sensing element between two optical fibers is explained. The experimental set-up and the components used in the fabrication process are described in details. Mechanical testing results of the fabricated silica/polymer optical fiber strain sensor are presented.

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Polymer optical fiber sensors for the civil infrastructure

Cited by 7 publications

References 15 publications

Polymer optical fiber sensors—a review

Polymer optical fiber sensors—a review

Behaviour of intrinsic polymer optical fibre sensor for large-strain applications

Fabrication and evaluation of hybrid silica/polymer optical fiber sensors for large strain measurement

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