scholarly journals Simplified sensor design for temperature-strain discrimination using fiber Bragg gratings embedded in laminated composites

2013 ◽  
Author(s):  
L. Rodriguez-Cobo ◽  
A. T. Marques ◽  
J.M. Lopez-Higuera ◽  
J. L. Santos ◽  
O. Frazão
Keyword(s):  
Laminated Composites ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Sensor Design ◽  
Temperature Strain

scholarly journals New design for temperature–strain discrimination using fiber Bragg gratings embedded in laminated composites

2013 ◽  
Vol 22 (10) ◽  
pp. 105011 ◽  
Author(s):  
L Rodriguez-Cobo ◽  
A T Marques ◽  
J M López-Higuera ◽  
J L Santos ◽  
O Frazão
Keyword(s):  
Laminated Composites ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Temperature Strain

Experimental Test Results for a Fiber Bragg Grating-Based Flow Sensor

2010 ◽  
Author(s):  
Robbert Pannekeet ◽  
Rodrigo Rodriguez-Erdmenger ◽  
Eric J. Ruggiero ◽  
Alexander Simpson ◽  
Christopher Wolfe
Keyword(s):  
Flow Velocity ◽  
Mass Flow ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Flow Sensor ◽  
Superior Performance ◽  
Strain Effect ◽  
Sensor Design ◽  
Flexible Beams ◽  
Thermally Induced

A fiber optic-based mass flow sensor has been developed that uses fiber Bragg gratings to deduce flow velocity. Flow velocity, local temperature, pressure measurements (that all can be extracted using fiber Bragg gratings) and geometric information can be combined to determine mass flow. A range of concepts have been investigated and compared using the same “design of experiment” for each sensor. The most promising concept has been further developed into a prototype. The working prototype successfully demonstrated a thermally insensitive sensor design that has the capability to track flow velocities. The sensor design is incorporated directly with a structural beam element to magnify the strain effect while simultaneously compensating for thermally-induced wavelength shifts in the sensor response. Further testing has been performed using three flexible beams at different angular positions showing that flow angles can be measured similar to the approach used for 3-hole pneumatic probes. As a final test, the sensor has been tested in a shock tube demonstrating superior performance compared to steady pneumatic measurements which rely on tubing to reach the measurement location.

Discrimination of Temperature, Strain, and Transverse Load by Using Fiber Bragg Gratings in a Twisted Configuration

2006 ◽  
Vol 6 (6) ◽  
pp. 1609-1613 ◽  
Author(s):  
S. F. O. Silva ◽  
O. Frazao ◽  
J. L. Santos ◽  
F.M. Araujo ◽  
L. A. Ferreira
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Transverse Load ◽  
Temperature Strain

Fabrication of superimposed fiber Bragg gratings and applications in fiber laser oscillators

Optik ◽  
2020 ◽  
Vol 214 ◽  
pp. 164583
Author(s):  
Qihao Hu ◽  
Pengrui Wang ◽  
Meng Wang ◽  
Zefeng Wang
Keyword(s):  
Fiber Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Laser Oscillators
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