scholarly journals Dynamic Consolidation Measurements in a Well Field Using Fiber Bragg Grating Sensors

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4403 ◽  
Author(s):  
Sandra Drusová ◽  
R. Martijn Wagterveld ◽  
Adam D. Wexler ◽  
Herman L. Offerhaus
Keyword(s):  
Groundwater Flow ◽  
Fiber Bragg Grating ◽  
Strain Sensors ◽  
Bragg Grating ◽  
Soil Consolidation ◽  
Flow Monitoring ◽  
Well Field ◽  
Term Data

Currently available groundwater flow prediction tools and methods are limited by insufficient spatial resolution of subsurface data and the unknown local heterogeneity. In this field study, fiber Bragg grating (FBG) sensors were installed in an extraction well field to investigate its potential to measure groundwater flow velocity. Reference in-situ pore pressure and temperature measurements were used to identify possible sources of FBG responses. FBG strain sensors were able to detect soil consolidation caused by groundwater extraction from 250 m distance. The results show that FBG responses were influenced by interface friction between soil and FBG packaging. FBG packaging slipped in soil and the effect was more pronounced during higher groundwater flow around a nearby well. These FBG fibers could be applied for indirect flow monitoring that does not require any tracer and provide real-time and long-term data during regular operation of extraction wells.

scholarly journals Possibilities for Groundwater Flow Sensing with Fiber Bragg Grating Sensors

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1730 ◽  
Author(s):  
Sandra Drusová ◽  
Wiecher Bakx ◽  
Adam D. Wexler ◽  
Herman L. Offerhaus
Keyword(s):  
Groundwater Flow ◽  
Fiber Bragg Grating ◽  
Optical Fibers ◽  
Flow Direction ◽  
Bragg Grating ◽  
Flow Monitoring ◽  
Flow Sensing ◽  
Well Clogging ◽  
Technical Specifications ◽  
Fbg Sensors

An understanding of groundwater flow near drinking water extraction wells is crucial when it comes to avoiding well clogging and pollution. A promising new approach to groundwater flow monitoring is the deployment of a network of optical fibers with fiber Bragg grating (FBG) sensors. In preparation for a field experiment, a laboratory scale aquifer was constructed to investigate the feasibility of FBG sensors for this application. Multiparameter FBG sensors were able to detect changes in temperature, pressure, and fiber shape with sensitivities influenced by the packaging. The first results showed that, in a simulated environment with a flow velocity of 2.9 m/d, FBG strain effects were more pronounced than initially expected. FBG sensors of a pressure-induced strain implemented in a spatial array could form a multiplexed sensor for the groundwater flow direction and magnitude. Within the scope of this research, key technical specifications of FBG interrogators for groundwater flow sensing were also identified.

Structure Optimization of Fiber Bragg Grating Strain Sensors

2012 ◽  
Vol 41 (11) ◽  
pp. 1261-1266 ◽  
Author(s):  
袁子琳 YUAN Zi-lin ◽  
龚元 GONG Yuan ◽  
马耀远 MA Yao-yuan ◽  
杜磊 DU Lei ◽  
吴宇 WU Yu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Structure Optimization ◽  
Strain Sensors ◽  
Bragg Grating

Fiber Bragg grating sensors for in-situ temperature measurement on bending a flexible planar supercapacitor

2020 ◽  
Vol 314 ◽  
pp. 112266
Author(s):  
Ranjana Seema ◽  
Soumen Mandal ◽  
Preeti Singh ◽  
Souvik Paul ◽  
Nripen Chanda
Keyword(s):  
Temperature Measurement ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Long-term in situ sap flow monitoring in a mature Dracaena cinnabari tree on Socotra

Biologia ◽  
2019 ◽  
Vol 74 (6) ◽  
pp. 609-622 ◽  
Author(s):  
N. Nadezhdina ◽  
A. Al-Okaishi ◽  
P. Maděra
Keyword(s):  
Sap Flow ◽  
Flow Monitoring ◽  
Dracaena Cinnabari

scholarly journals Corrigendum to “Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel”

2019 ◽  
Vol 2019 ◽  
pp. 1-1 ◽  
Author(s):  
Jinxing Lai ◽  
Junling Qiu ◽  
Haobo Fan ◽  
Qian Zhang ◽  
Zhinan Hu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Safety Assessment ◽  
In Situ Monitoring ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors
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