scholarly journals In-Situ Cure Monitoring of Wind Turbine Blades by Using Fiber Bragg Grating Sensors and Fresnel Reflection Measurement

Sensors ◽  
2015 ◽  
Vol 15 (8) ◽  
pp. 18229-18238 ◽  
Author(s):  
Umesh Sampath ◽  
Hyunjin Kim ◽  
Dae-gil Kim ◽  
Young-Chon Kim ◽  
Minho Song
Keyword(s):  
Wind Turbine ◽  
Fiber Bragg Grating ◽  
Turbine Blades ◽  
Bragg Grating ◽  
Fresnel Reflection ◽  
Wind Turbine Blades ◽  
Cure Monitoring ◽  
Fiber Bragg Grating Sensors ◽  
Reflection Measurement

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

scholarly journals Applicability of fiber Bragg grating sensors for cure monitoring in resin transfer molding processes

2020 ◽  
pp. 073168442095811
Author(s):  
Yannick Blößl ◽  
Gergely Hegedüs ◽  
Gábor Szebényi ◽  
Tamás Tábi ◽  
Ralf Schledjewski ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Resin Transfer Molding ◽  
Sol Gel ◽  
Bragg Grating ◽  
Gel Point ◽  
Strain Response ◽  
Resin System ◽  
Transfer Molding ◽  
Cure Monitoring ◽  
Fiber Bragg Grating Sensors

This article examines the use of fiber Bragg grating sensors for cure monitoring purposes in resin transfer molding processes. Within a resin transfer molding test series a thermoset epoxy-amine resin system was used in combination with a woven flax fiber reinforcement. Particular attention was paid on the location of the optical fiber sensor and its sensitive Bragg grating element inside the mold cavity. Three different installation approaches were tested and the correlation of the corresponding strain response with the actual cure state of the resin system was investigated at 50°C and 70°C isothermal cure temperature, respectively. We could demonstrate that characteristic, conspicuous strain changes are directly related to the sol–gel conversion of the thermoset polymer, which was analyzed considering different approaches for the gel-point detection based on rheological measurements. With the installation of the sensor inside a controllable, capsuled resin volume, we could achieve the most reliable strain response that provides capabilities to give in-situ information of the cure state beyond the gelation point.

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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