&lt;title&gt;Commercialization of fiber-optic strain gauge systems&lt;/title&gt;

Mason, T. G. Beck; Valis, Tomas; Hogg, W. Dayle

doi:10.1117/12.141246

Cited by 3 publications

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“…Initial exploration in transforming optical fibers into fiber-optic strain sensors (FOSS) started in the 1970′s (e.g., [ 66 , 67 ]) and resulted in the first fiber optic strain sensors and their application in the 1980′s (e.g., [ 68 , 69 , 70 , 71 ]). They were rapidly converted into commercial products in the 1990′s, initially by existing companies [ 72 ], followed by a surge of startups and new companies.…”

Section: Second Generation: Discrete Short-gauge Long-gauge and Distr...mentioning

confidence: 99%

Concise Historic Overview of Strain Sensors Used in the Monitoring of Civil Structures: The First One Hundred Years

Glišić

2022

Sensors

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Strain is one of the most frequently monitored parameters in civil structural health monitoring (SHM) applications, and strain-based approaches were among the first to be explored and applied in SHM. There are multiple reasons why strain plays such an important role in SHM: strain is directly related to stress and deflection, which reflect structural performance, safety, and serviceability. Strain field anomalies are frequently indicators of unusual structural behaviors (e.g., damage or deterioration). Hence, the earliest concepts of strain sensing were explored in the mid-XIX century, the first effective strain sensor appeared in 1919, and the first onsite applications followed in the 1920′s. Today, one hundred years after the first developments, two generations of strain sensors, based on electrical and fiber-optic principles, firmly reached market maturity and established themselves as reliable tools applied in strain-based SHM. Along with sensor developments, the application methods evolved: the first generation of discrete sensors featured a short gauge length and provided a basis for local material monitoring; the second generation greatly extended the applicability and effectiveness of strain-based SHM by providing long gauge and one-dimensional (1D) distributed sensing, thus enabling global structural and integrity monitoring. Current research focuses on a third generation of strain sensors for two-dimensional (2D) distributed and quasi-distributed sensing, based on new advanced technologies. On the occasion of strain sensing centenary, and as an homage to all researchers, practitioners, and educators who contributed to strain-based SHM, this paper presents an overview of the first one hundred years of strain sensing technological progress, with the objective to identify relevant transformative milestones and indicate possible future research directions.

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Section: Second Generation: Discrete Short-gauge Long-gauge and Distr...mentioning

confidence: 99%

Concise Historic Overview of Strain Sensors Used in the Monitoring of Civil Structures: The First One Hundred Years

Glišić

2022

Sensors

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“…The time difference manifests itself as the contrast that describes the amplitude of the interference signal. The demodulation schemes require the contrast to be constant and nearly equal to 1, what can be fulfilled for single-mode semiconductor lasers in the limited range of a few dozen of millimiters 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Generally, when light propagates through a lightguide is sensitive to lots of internal and external factors. The most known sensors base on light intensity 1 , fiber Bragg gratings 2 and interferometers, both coherence 3 and white light 4 .…”

Section: Introductionmentioning

confidence: 99%

Simulations and experimental research of fiber optic contrast-based dislocation sensor

2004

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The dislocation sensor based on the contrast phenomenon in an unbalanced fiber optic Michelson interferometer with a 3 x 3 coupler and a semiconductor multimode laser. Periodic contrast oscillations, which depend on a laser spectrum, occur if a measuring arm of the interferometer is elongated. A conception of the elongation sensor that based on linearization of contrast oscillations is shown. A virtual model of the sensor was built for simulations. For real parameters of 1 -m long sensor, 5-mm measuring range with 12-µm uncertainty was obtained. Next, a setup of the sensor and signal processing scheme of real sensor is presented. During measurements we obtained 5-mm measuring range with ± 28-µm uncertainty. Explanation of these differences and conclusion to further research are formulated.

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Fiber optic sensor network for the monitoring of civil engineering structures

Inaudi¹

2005

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<title>Commercialization of fiber-optic strain gauge systems</title>

Cited by 3 publications

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Concise Historic Overview of Strain Sensors Used in the Monitoring of Civil Structures: The First One Hundred Years

Concise Historic Overview of Strain Sensors Used in the Monitoring of Civil Structures: The First One Hundred Years

Simulations and experimental research of fiber optic contrast-based dislocation sensor

Fiber optic sensor network for the monitoring of civil engineering structures

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