scholarly journals A High Temperature Solid Pressure Sensor Based on Fiber Bragg Grating

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2098
Author(s):  
Hongying Guo ◽  
Jiang Chen ◽  
Zhumei Tian ◽  
Aizhen Wang
Keyword(s):  
High Temperature ◽  
Fiber Bragg Grating ◽  
High Temperatures ◽  
Pressure Sensor ◽  
Structural Model ◽  
Structural Parameters ◽  
Structure Design ◽  
Bragg Grating ◽  
Circular Membrane ◽  
Sensor Structure

For the requirement of pressure detection in high temperature environments, this paper presents a fiber Bragg grating (FBG) based pressure sensor with a simple structure. The structural model of the sensor has been established with the consideration of a sensing principle and a small deflection effect of the circular membrane. The finite element analysis has been employed to validate the rationality of the sensor structure design and realize the digital simulation of the theoretical model. Through the analysis, the selection of packaging materials, the design of structural parameters and the pressure and temperature calibration of the developed sensor has been performed. The encapsulation of the sensor at high temperatures has been improved based on the theoretical analysis, simulation and testing, which proves the effectiveness of the sensor for pressure measurement at high temperatures of 100 °C~250 °C. The study provides a feasible sensing device for high-temperature pressure detection.

Fatigue Behavior of Metal-Packaged Regenerated Fiber Bragg Grating Strain Sensors at High Temperatures: A Preliminary Study

2019 ◽  
Vol 795 ◽  
pp. 352-357
Author(s):  
Hao Xu ◽  
Yun Tu ◽  
Ya Li Wang ◽  
Shan Tung Tu
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Fiber Bragg Grating ◽  
High Temperatures ◽  
Spectral Response ◽  
Fatigue Tests ◽  
Strain Sensors ◽  
Bragg Grating ◽  
Bragg Wavelength ◽  
Integrity Assessment

Regenerated Fiber Bragg grating (RFBG) sensors exhibit tremendous growth in recent years and could be widely used for measuring strains and for structural integrity assessment of components operated at high-temperature if critical issues (fatigue life, interface integrity, etc.) are addressed. For the determination of fatigue life of metal-packaged RFBG strain sensors at high temperatures, tensile fatigue tests are performed on the sensors. The preliminary results show that the sensors exhibit good linearity and repeatability, and rare sensitivity change under cyclic tension loading when exposed to constant high temperature up to 500 °C, without obvious variations in the spectral response. The rupture of the optical fibers is the major cause of fatigue failure of the sensors. The sensors subjected to lower test strain have greater fatigue life. A rapid decrease in Bragg wavelength is observed at the beginning of the fatigue tests followed by stabilization of the Bragg wavelength. These results indicate that the sensors are the promising candidates for health monitoring of structures subjected to cyclic loads at high temperatures.

Fiber Bragg grating–based hydraulic pressure sensor with enhanced resolution

2015 ◽  
Vol 54 (9) ◽  
pp. 096104 ◽  
Author(s):  
Vengal Rao Pachava ◽  
Srimannarayana Kamineni ◽  
Sai Shankar Madhuvarasu ◽  
Venkata Reddy Mamidi
Keyword(s):  
Fiber Bragg Grating ◽  
Pressure Sensor ◽  
Bragg Grating ◽  
Hydraulic Pressure ◽  
Enhanced Resolution

Fiber optic pressure sensor using a fiber Bragg grating

1998 ◽  
Author(s):  
Chuan S. Tjin ◽  
Jianzhong Hao ◽  
Rahul Malik
Keyword(s):  
Fiber Bragg Grating ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Bragg Grating
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