Monitoring of inhomogeneous flow distributions using fibre-optic Bragg grating temperature sensor arrays

2006 ◽  
Author(s):  
Ines Latka ◽  
Thomas Bosselmann ◽  
Wolfgang Ecke ◽  
Michael Willsch
Keyword(s):  
Temperature Sensor ◽  
Sensor Arrays ◽  
Bragg Grating ◽  
Fibre Optic ◽  
Inhomogeneous Flow

Novel methods for identifying and quantifying hyporheic exchange fluxes using Fibre Bragg Grating sensor arrays

2020 ◽  
Author(s):  
John Arkwright ◽  
Eddie W Banks ◽  
Margaret Shanafield ◽  
Anthony Papageorgiou
Keyword(s):  
Sensor Arrays ◽  
Heat Pulse ◽  
Heat Diffusion ◽  
Hyporheic Exchange ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Fibre Optic ◽  
Hydraulic Gradients ◽  
Fibre Bragg Grating Sensor ◽  
Bragg Grating Sensor

<p>Most streambed heat tracer studies use vertical, ambient temperature profiles and a 1D analytical solution of the heat diffusion–advection equation to estimate hyporheic exchange fluxes (HEF). This approach has limited capacity in complex flow settings, which has led to the successful development of active heat pulse sensing to investigate the dynamic 3D flow fields in the near subsurface and to quantify HEF. At the scale of the hyporheic zone very small water level fluctuations drive changes in the hydraulic gradients across streambed bedform structures. Generally, hydraulic head gradients are measured with pressure sensors deployed in shallow monitoring wells, but such devices do not have the required vertical spatial resolution and precision to accurately evaluate these processes. New and novel research developed by the biomedical community for in-vivo medical devices can now be used in the geosciences field to measure temperature and pressure at a much higher spatial and temporal resolution to overcome these challenges. As part of this research we have developed a fibre optic, active heat pulse and pressure sensing instrument (formed from Fibre Bragg Grating sensor arrays) to determine small hydraulic gradients in the subsurface and to quantify the exchange fluxes. The instrument was tested in a controlled laboratory environment and in the field. Combining point-scale measurements from this novel instrument with near surface geophysical data and other hydrological observations (i.e. measurements with fibre optic distributed temperature sensing) can be used to upscale some of the key physical exchange processes to the stream reach and river scale.</p>

Spatially-multiplexed fibre-optic Bragg grating strain and temperature sensor system based on interferometric wavelength-shift detection

1995 ◽  
Vol 31 (12) ◽  
pp. 1009-1010 ◽  
Author(s):  
Y.J. Rao ◽  
L. Zhang ◽  
I. Bennion ◽  
K. Kalli ◽  
G. Brady ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Fibre Optic ◽  
Shift Detection

Fibre-optic temperature sensor with wide temperature range characteristics

1987 ◽  
Vol 134 (5) ◽  
pp. 291 ◽  
Author(s):  
K.T.V. Grattan ◽  
J.D. Manwell ◽  
S.M.L. Sim ◽  
C.A. Willson
Keyword(s):  
Wide Temperature Range ◽  
Temperature Sensor ◽  
Fibre Optic ◽  
Temperature Range

Temperature sensor based on a fibre-optic differential delay RF filter

1988 ◽  
Vol 24 (21) ◽  
pp. 1305 ◽  
Author(s):  
C.A. Wade ◽  
A.D. Kersey ◽  
A. Dandridge
Keyword(s):  
Temperature Sensor ◽  
Fibre Optic ◽  
Differential Delay ◽  
Rf Filter

Unambiguous Peak Identification of a Silicon Fabry‐Perot Temperature Sensor Assisted With an In-Line Fiber Bragg Grating

2019 ◽  
Vol 37 (17) ◽  
pp. 4210-4215 ◽  
Author(s):  
Zigeng Liu ◽  
Guigen Liu ◽  
Yupeng Zhu ◽  
Qiwen Sheng ◽  
Xin Wang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Sensor ◽  
Bragg Grating ◽  
Peak Identification ◽  
Fabry Perot

scholarly journals A Fiber Bragg Grating—Bimetal Temperature Sensor for Solar Panel Inverters

Sensors ◽  
2011 ◽  
Vol 11 (9) ◽  
pp. 8665-8673 ◽  
Author(s):  
Mohd Afiq Ismail ◽  
Nizam Tamchek ◽  
Muhammad Rosdi Abu Hassan ◽  
Katrina D. Dambul ◽  
Jeyraj Selvaraj ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Sensor ◽  
Solar Panel ◽  
Bragg Grating

Development of Fiber Bragg Grating (FBG) as Temperature Sensor Inside Packed-bed Non-thermal Plasma Reactor

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
Siti Musliha Aishah Musa ◽  
RK Raja Ibrahim ◽  
Asrul Izam Azmi
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Variation ◽  
Thermal Plasma ◽  
Temperature Sensor ◽  
Plasma Reactor ◽  
Packed Bed ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Bragg Wavelength ◽  
Non Thermal Plasma

This paper presents early work on Fiber Bragg grating (FBG) as temperature sensor to monitor temperature variation inside a packed-bed non-thermal plasma reactor. FBG made from germania-doped fiber with center Bragg wavelength of 1552.5 nm was embedded inside non-thermal plasma reactor with sphere shape dielectric bead (barium titanate) and used to probe the temperature variation inside the reactor. The experimental works have proven that FBG is a suitable sensor to monitor temperature variation inside of reactor via LabVIEW program. Besides that, Optical Spectrum Analyzer (OSA) recorded Bragg wavelength shift as voltage of power supply increases, which indicate the non-uniform temperature variation occurring inside the reactor. However, it does not affect the chemical reaction inside the reactor because the temperature condition is in steady state.

Refractive Index and Temperature Sensor Based on D-Shaped Fiber Combined With a Fiber Bragg Grating

2019 ◽  
Vol 19 (4) ◽  
pp. 1362-1367 ◽  
Author(s):  
Yue Dong ◽  
Shiying Xiao ◽  
Beilei Wu ◽  
Han Xiao ◽  
Shuisheng Jian
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Temperature Sensor ◽  
Bragg Grating
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