Results 21 to 30 of about 1,008 (192)

Dynamic strain measurement of hydraulic system pipeline using fibre Bragg grating sensors

Advances in Mechanical Engineering, 2016
Fatigue failure is a serious problem in hydraulic piping systems installed in the machinery and equipment working in harsh operational conditions. To alleviate this problem, health monitoring of pipes can be conducted by measuring and analysing vibration-
Qiang Wang, Jun Huang, Quan Liu, Zude Zhou   +3 more
doaj   +1 more source

Simultaneous Vector Bend and Temperature Sensing Based on a Polymer and Silica Optical Fibre Grating Pair

Sensors, 2018
The bending response of polymer optical fibre Bragg grating (POFBG) and silica optical fibre Bragg grating (SOFBG) mounted on a brass beam have been systematically studied and compared.
Binbin Yan, Guoqiang Liu, Jun He, Yanhua Luo, Liwei Yang, Haifeng Qi, Xinzhu Sang, Kuiru Wang, Chongxiu Yu, Jinhui Yuan, Gang-Ding Peng   +10 more
doaj   +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

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

Regenerated gratings [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
Strong regenerated gratings with a maximum grating strength exceeding (40–50) dB are fabricated inside an optical fibre by bulk macro thermal processing ∼ 900°C using a UV-laser seeded Bragg grating. Further annealing between 1000°C and 1100°C leads to a
Canning John, Bandyopadhyay Somnath, Stevenson Michael, Biswas Palas, Fenton Jacob, Aslund Mattias   +5 more
doaj   +1 more source

Evaluation and identification of dynamic strain on a blast door subjected to blast loading using fibre Bragg grating sensors

International Journal of Distributed Sensor Networks, 2018
Tunnels and subway blast doors are effective barriers to terrorist attacks and emergencies, and research into the mechanical properties of blast doors under explosive dynamic loads can improve and enhance the performance thereof. In this article, surface
Ziming Xiong, Qinghua Zhang, Hao Lu, Shaoshuai Shi, Zewei You, Yuanpu Xia, Lin Bu   +6 more
doaj   +1 more source

Photonic integrated circuits for terahertz source generation

IET Optoelectronics, 2020
The authors introduce four kinds of terahertz photonics components based on photonic integrated circuits (PICs). A PIC‐based integrated optoelectronic synthesiser for THz communications is described, which can be tuned continuously over the range 0.254–2.
Lianping Hou, Song Tang, Bin Hou, John H. Marsh   +3 more
doaj   +1 more source

Extreme Silica Optical Fibre Gratings

Sensors, 2008
A regenerated optical fibre Bragg grating that survives temperature cycling up to 1,295°C is demonstrated. A model based on seeded crystallisation or amorphisation is proposed.
Kevin Cook, Somnath Bandyopadhyay, Michael Stevenson, John Canning   +3 more
doaj   +1 more source

An Optical Fibre Depth (Pressure) Sensor for Remote Operated Vehicles in Underwater Applications

Sensors, 2017
A miniature sensor for accurate measurement of pressure (depth) with temperature compensation in the ocean environment is described. The sensor is based on an optical fibre Extrinsic Fabry-Perot interferometer (EFPI) combined with a Fibre Bragg Grating ...
Dinesh Babu Duraibabu, Sven Poeggel, Edin Omerdic, Romano Capocci, Elfed Lewis, Thomas Newe, Gabriel Leen, Daniel Toal, Gerard Dooly   +8 more
doaj   +1 more source

Assessment of the Measurement Performance of the Multimodal Fibre Optic Shape Sensing Configuration for a Morphing Wing Section

Sensors, 2022
In this paper, with the final aim of shape sensing for a morphing aircraft wing section, a developed multimodal shape sensing system is analysed. We utilise the method of interrogating a morphing wing section based on the principles of both hybrid ...
Nakash Nazeer, Roger M. Groves, Rinze Benedictus   +2 more
doaj   +1 more source