Biaxial optical fiber sensor based in two multiplexed Bragg gratings for simultaneous shear stress and vertical pressure monitoring

2018 ◽  
Author(s):  
Cátia Tavares ◽  
M. Fátima Domingues ◽  
Anselmo Anselmo Frizera-Neto ◽  
Cátia Leitão ◽  
Nélia Alberto ◽  
...  
Keyword(s):  
Shear Stress ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Bragg Gratings ◽  
Fiber Sensor ◽  
Pressure Monitoring ◽  
Vertical Pressure

scholarly journals Verification of Blood Pressure Monitoring System Using Optical Fiber Sensor

2020 ◽  
Vol 76 (2) ◽  
pp. 79-87
Author(s):  
Kyoko Katayama ◽  
Shun Chino ◽  
Shohei Koyama ◽  
Hiroaki Ishizawa ◽  
Keisaku Fujimoto
Keyword(s):  
Blood Pressure ◽  
Optical Fiber ◽  
Monitoring System ◽  
Blood Pressure Monitoring ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Pressure Monitoring

Catalyst-type-an optical fiber sensor for hydrogen leakage based on fiber Bragg gratings

2015 ◽  
Vol 217 ◽  
pp. 151-157 ◽  
Author(s):  
Satoshi Masuzawa ◽  
Shinji Okazaki ◽  
Yusuke Maru ◽  
Tadahito Mizutani
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Fiber Sensor ◽  
Catalyst Type

Method of Measuring Tendon Force using Optical Fiber Sensor

2018 ◽  
Vol 56 (1) ◽  
pp. 94-99
Author(s):  
N. Sogabe ◽  
S. Nakaue ◽  
K. Chikiri ◽  
M. Hayakawa
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Tendon Force

scholarly journals Oxygen concentration measurement in the porous cathode of a lithium-air battery using a fine optical fiber sensor

2019 ◽  
Vol 5 (0) ◽  
pp. 19-00095-19-00095
Author(s):  
Shogo FUJIMOTO ◽  
Suguru UEMURA ◽  
Nobuyuki IMANISHI ◽  
Shuichiro HIRAI
Keyword(s):  
Optical Fiber ◽  
Oxygen Concentration ◽  
Optical Fiber Sensor ◽  
Concentration Measurement ◽  
Fiber Sensor ◽  
Porous Cathode ◽  
Air Battery

scholarly journals Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1166
Author(s):  
Bin Liu ◽  
Jianping He ◽  
Shihai Zhang ◽  
Yinping Zhang ◽  
Jianan Yu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Frequency Shift ◽  
Optical Fiber Sensor ◽  
Gain Spectrum ◽  
Fiber Sensor ◽  
Peak Fitting ◽  
Fitting Algorithm ◽  
Distributed Optical Fiber Sensor ◽  
Brillouin Gain ◽  
Distributed Optical Fiber

Brillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which leads to the extraction error of BFS. In order to enhance the extraction accuracy of BFS, the Lorenz local single peak fitting algorithm was developed to fit the Brillouin gain spectrum curve, which can make the BSG symmetrical with respect to the Brillouin center frequency shift. One temperature test of a fiber-reinforced polymer (FRP) packaged sensor whose BSG curve is asymmetric was conducted to verify the idea. The results show that the local region curve of BSG processed by the developed algorithm has good symmetry, and the temperature measurement accuracy obtained by the developed algorithm is higher than that directly measured by demodulation equipment. Comparison with the reference temperature, the relative measurement error measured by the developed algorithm and BOTDA are within 4% and 8%, respectively.

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