Results 41 to 50 of about 317,323 (368)

Optical fiber sensors for coal mine shaft integrity and equipment condition monitoring [PDF]

open access: yes, 2019
Shaft is an important structure of mine. Deep mining increases mine pressure, induces shaft deformation and affects mine normal lifting. How to improve the inspection efficiency, reduce the maintenance cost and ensure the normal operation of the shaft is
Fu, J.   +9 more
core   +1 more source

Distributed fiber optic interferometric geophone system based on draw tower gratings

open access: yesPhotonic Sensors, 2017
A distributed fiber optic interferometric geophone array based on draw tower grating (DTG) array is proposed. The DTG geophone array is made by the DTG array fabricated based on a near-contact exposure through a phase mask during the fiber drawing ...
Ruquan Xu, Huiyong Guo, Lei Liang
doaj   +1 more source

Sapphire Fiber Fabry-Perot Sensors With High Fringe Visibility

open access: yesIEEE Photonics Journal, 2022
It is difficult for sapphire fiber Fabry-Perot (FP) sensors to generate high quality interference fringes because their highly multimode property. In this paper, we report a sapphire fiber FP strain sensing system with high fringe visibility, realized by
Jiawei Zhang   +3 more
doaj   +1 more source

Distributed Weak Fiber Bragg Grating Vibration Sensing System Based on 3 × 3 Fiber Coupler

open access: yesPhotonic Sensors, 2018
A novel distributed weak fiber Bragg gratings (FBGs) vibration sensing system has been designed to overcome the disadvantages of the conventional methods for optical fiber sensing networking, which are: low signal intensity in the usually adopted time ...
Wei Li, Jian Zhang
doaj   +1 more source

Optical fiber sensor review [PDF]

open access: yes, 2020
Technology of fiber optic are widely used for its applications which mostly known for carrying information over long distances for the best efficiency.
Abdul Manaf, Muhammad Shukri   +3 more
core  

Miniature fiber-optic tip pressure sensor assembled by hydroxide catalysis bonding technology.

open access: yesOptics Express, 2020
A miniature fiber-optic tip Fabry-Perot (FP) pressure sensor with excellent high-temperature survivability, assembled by hydroxide catalysis bonding (HCB) technology, is proposed and experimentally demonstrated.
Yueying Liu   +7 more
semanticscholar   +1 more source

A Two Fiber Bragg Gratings Sensing System to Monitor the Torque of Rotating Shaft

open access: yesSensors, 2016
By fixing two FBGs on the surface of a rotating shaft along the direction of ±45° and using dynamic wavelength demodulation technology, we propose an optical fiber sensing system to monitor the driving torque and torsion angle of the rotating shaft.
Yongjiao Wang   +4 more
doaj   +1 more source

Optical Fiber Grating Hydrogen Sensors: A Review

open access: yesSensors, 2017
In terms of hydrogen sensing and detection, optical fiber hydrogen sensors have been a research issue due to their intrinsic safety and good anti-electromagnetic interference.
Jixiang Dai   +6 more
doaj   +1 more source

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