Comparisons and validations of optical fibre patch sensor measurements were performed using digital image correlation, resulting in a sensitivity of the sensors reaching 0.01 mm/K, and an
The ability to measure strains quasi-continuously with high spatial resolution makes distributed fiber optic sensing a promising technology for structural health
Distributed fiber optic sensors (DFOSs) offer unique capabilities for crack monitoring via measuring strain distributions. However, manually interpret
Abstract The high spatial resolution of distributed fiber optic sensors enables quasi-continuous strain measurements, which makes it a promising technology for structural health
Abstract The possibility to measure strains continuously using distributed fiber optic sensors (DFOS) offers enormous potential for structural health monitoring. Cracks can be automatically detected,
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The article presents research on the performance of different distributed fibre optic sensing (DFOS) tools, including both layered cables and
In this work, a novel hybrid fiber optic cable is proposed to overcome the limitations of distributed fiber optic sensing for crack detection and monitoring
This study presents a novel fiber-optic sensor named short-gauged Brillouin fiber optic sensor, which enables basic Brillouin-based analyzers to achieve early crack detection and accurate
The assessment of reinforced concrete structures is primarily based on the detection of cracks and associated potential damage to concrete or embedded reinforcement. Distributed fibre optic
Given that the crack opening direction often differs from the fiber optic cable direction in practical applications, this study provides valuable insights for more accurate damage quantification
Using conventional sensors at local measuring points, such as strain gauges, only known cracks can be observed, since their location is unknown before the onset of cracking. With continuous fiber-optic
The tradeoff of the maximum measurable crack width and the spacing is quantified. This study develops a method to measure crack width using a distributed fiber optic sensor. To this end, a
Cracks can negatively affect the durability of concrete structures, making effective crack monitoring crucial for maintenance. Utilizing coherent optical frequency domain reflectometry, it is
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The test results show that detecting and monitoring cracks with the sensor do not require a-priori knowledge of crack locations and orientations.
This study proposes a semi-analytical model for predicting strain curves for arbitrary crack patterns, based on experimentally derived parameters, such as sensitivity, strain lag parameter, and
In this paper a novel distributed fiber optic crack sensor with polymer encapsulation based on optical time domain reflectometer (OTDR) is presented. The sensor head includes two
Monitoring of cracks and crack growth rates is a crucial aspect of structural health monitoring for concrete infrastructure, and multiple manual and automatic monitoring techniques
In this paper, a fiber optic sensor with distributed crack sensing capability based on optical time domain reflectometry is proposed and its sensing principle is introduced. Experiments
Distributed fiber optic sensors (DFOS) offer unique advantages for automated crack monitoring [, , ]. When interrogated using coherent optical frequency domain reflectometry
makes distributed fiber optic sensing a promising technology for structural health monitoring as it allows to locate and measure damages in concrete structures, such as cracks. Depending on whether the
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Fibre optics, supplemented by conventional measuring technology, was able to detect elastic strain, crack formation and decisive shear cracks of the
What Is Distributed Temperature Sensing? Distributed temperature sensing (DTS) measures temperature distribution over the length of an optical fiber cable using
The possibility to measure strains continuously using distributed fiber optic sensors (DFOS) offers enormous potential for structural health monitoring. Cracks can be automatically detected, localized
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