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Showing 1 to 9 of 9 for “"Optical fiber sensing"”.
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Novel Uses of Distributed Optical Fiber Sensing for Geo-Mechanical Monitoring
… instruments due to high costs. Distributed Optical Fiber Sensing (DOFS) is a powerful technology with advantages like long sensor length, real-time measurement capabilities, ease of installation, low cost, and distributed measurement. However, its application in rock mass monitoring is …
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High-Speed Quasi-Distributed Optical Fiber Sensing Based on Ultra-Weak Fiber Bragg Gratings
Invention of silica based optical fiber not only led to revolution in communication but also provided fundamental basis for many research areas. One example area is distributed optical fiber sensing, which has been attracting research interests for decades. Optical fiber sensors are immune to …
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Remote optical fiber sensing based on reflectance due to the swelling of polymer particles produced by dispersion polymerization
… and used for remote measurements employing fiber optic sensors. The refractive index of poly(4-vinyl pyridine) particles is higher than the refractive index of the hydrogel. At low pH, protonation of the poly(vinyl pyridine) causes the particles to swell reducing their refractive index and …
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Real-Time Signal Processing and Hardware Development for a Wavelength Modulated Optical Fiber Sensor System
The use of optical fiber sensors is increasing widely in civil, industrial, and military applications mainly due to their, (a) miniature size, (b) high sensitivity, (c) immunity from electro-magnetic interference, (d) resistance to harsh environments, (e) remote signal processing ability, and, (f) …
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Micro-optical fiber devices used with modal domain sensing
In order to develop more compact optical fiber sensing systems, modal filtering can be performed in-line by using micro-optical devices. Two such devices are a laterally offset few-moded optical fiber mechanical splice and a modal conversion optical fiber coupler. A third device, the air-gap splice …
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Sapphire optical fibers: splicing and sensing applications
Fiber optic sensors fabricated from standard silica fibers have many advantages over conventional sensors like small size, portability, durability and immunity to electromagnetic fields. Unfortunately, these sensors are not suitable for use in harsh environments where the temperatures are greater …
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Advanced Computing and Sensing to Improve Mine Fire Characterization and Response
… this research presents the applicability of optical fiber sensing technology for continuous, distributed, and real-time sensing. This new technology could be used for collection of input parameters during ongoing fires, leading to improvement of the prediction performance of the ANNs …
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Optical fiber-based corrosion sensor systems
An investigation into optical fiber sensing methods for monitoring metallic corrosion 1s presented. A series of sensing techniques are presented and explored, and two techniques are identified as possible candidates for a corrosion sensing system. The first is a technique based on the phenomenon of …
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Dissolved Gas Analysis of Insulating Transformer Oil Using Optical Fiber
… been performed discovering new ways integrate optical fiber sensors into high voltage transformers. This thesis is a continuation of that research by attempting to improve sensor sensitivity for hydrogen and acetylene gasses. Of note is the fabrication of new hydrogen sensing fiber for …