Results 21 to 30 of about 30,351 (276)

Humidity Sensing by Chitosan-Coated Fibre Bragg Gratings (FBG)

Sensors, 2021
In this work, we report novel relative humidity sensors realized by functionalising fibre Bragg gratings with chitosan, a moisture-sensitive biopolymer never used before for this kind of fibre optic sensor.
Rosaria D’Amato, Andrea Polimadei, Gaetano Terranova, Michele Arturo Caponero   +3 more
doaj   +1 more source

Intrinsic, multiplexable sensors for electric field strength using structural slow light in phase-shifted fibre Bragg gratings [PDF]

, 2012
In this paper we demonstrate through simulation the potential for phase-shifted fibre Bragg gratings incorporating structural slow light to enable intrinsic reflection-mode point sensors for electric field or voltage.
Niewczas, Pawel, Orr, Philip
core   +1 more source

Investigation of shock waves in explosive blasts using fibre optic pressure sensors [PDF]

, 2005
The published version of this article may be accessed at the link below. Copyright @ IOP Publishing, 2006.We describe miniature all-optical pressure sensors, fabricated by wafer etching techniques, less than 1 mm(2) in overall cross-section with rise ...
, A Hindle, A Tyas, A V Pichugin, Abeysinghe D C, C Dunare, Hyde D W, J D C Jones, J S Barton, Kinney G F, Laermer F Schilp A, S Watson, Smith P D, T Stevenson, Totsu K, W N MacPherson, W Parkes, Yu B   +17 more
core   +1 more source

Flexible protection architectures using distributed optical sensors [PDF]

, 2012
In this paper we describe recent developments in flexible protection schemes that make use of passive fibre Bragg grating (FBG) based transducers for the distributed measurement of voltage and current.
Beaumont, Phil, Booth, Campbell, Dysko, Adam, Fusiek, Grzegorz, Kawano, Fumio, Niewczas, Pawel, Nishida, Tomonori, Orr, Philip   +7 more
core   +1 more source

Advances in fibre optic based geotechnical monitoring systems for underground excavations

International Journal of Mining Science and Technology, 2019
Geotechnical stability is a major concern for the long-term safety and integrity of underground infrastructures such as tunnels, railway stations, mine shafts and hydraulic power chambers.
Hongkui Gong, Mehmet S. Kizil, Zhongwei Chen, Moe Amanzadeh, Ben Yang, Saiied M. Aminossadati   +5 more
doaj   +1 more source

Interrogation of fibre Bragg gratings through a fibre optic rotary joint on a geotechnical centrifuge [PDF]

, 2016
The monitoring of an array of fibre Bragg gratings (FBGs) strain sensors was performed through a single channel, single mode fibre optic rotary joint (FORJ) mounted on a geotechnical centrifuge.
Correia, Ricardo N., Heron, Charles, James, Stephen W., Korposh, Sergiy, Marshall, Alec   +4 more
core   +1 more source

In-sewer field-evaluation of an optical fibre-based condition monitoring system [PDF]

, 2020
A Fiber Bragg Grating (FBG) based monitoring system for continuous humidity and temperature measurement has been designed and evaluated experimentally in a sewer environment with high corrosion rates, humidity and the presence of gaseous hydrogen sulfide.
Bustamante, H., Chen, Y., Fabian, M., Grattan, K. T. V., Rente, B., Sun, T., Vorreiter, L.   +6 more
core   +1 more source

Universal Signal Conditioning Technique for Fiber Bragg Grating Sensors in PLC and SCADA Applications

Instruments, 2017
Optical fibre sensors, such as Fibre Bragg Gratings (FBGs), are growing in their utilisation, although very niche in their applications. To enable a more diverse range of end users, expensive application-specific optical fibre interrogation hardware ...
Gary Allwood, Graham Wild, Steven Hinckley   +2 more
doaj   +1 more source

Detection of solvents using a distributed fibre optic sensor [PDF]

, 2003
A fibre optic sensor that is capable of distributed detection of liquid solvents is presented. Sensor interrogation using optical time domain reflectometry (OTDR) provides the capability of locating solvent spills to a precision of ±2 m over a total ...
A. MacLean, B. Culshaw, C. Moran, D. Marsh, Diemeer, Fields, Michie, P. Parker, W. Johnstone   +8 more
core   +1 more source

Dual Measurement of Strain and Temperature Using the Combination of Er -Doped Fibre Fluorescence Lifetime and a Fibre Bragg Grating

Measurement + Control, 2001
Fibre optic sensing devices have been produced for the dual measurement of strain and temperature using the combined properties of fibre Bragg gratings and the fluorescence lifetime of erbium-doped fibre.
S.A. Wade, D.I. Forsyth, Q. Guofu, X. Chen, T. S. Chuan, W. Yong, T. Sun, K T V Grattan   +7 more
doaj   +1 more source