scholarly journals Strain Transfer Analysis of Embedded Fiber Bragg Grating Strain Sensor

2015 ◽  
Vol 44 (6) ◽  
pp. 20140388 ◽  
Author(s):  
Li Sun ◽  
Hong Hao ◽  
Bo Zhang ◽  
Xueling Ren ◽  
Jun Li
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Strain Transfer

scholarly journals Development and Application of Smart Geogrid Embedded with Fiber Bragg Grating Sensors

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Zheng-fang Wang ◽  
Jing Wang ◽  
Qing-mei Sui ◽  
Xun-mei Liang ◽  
Lei Jia ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Distribution ◽  
Fiber Optic ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Tunnel Excavation ◽  
Strain Transfer ◽  
Geotechnical Structures ◽  
Higher Temperature ◽  
Geotechnical Model

Smart geogrids embedded with fiber Bragg grating (FBG) for reinforcement as well as measurement of geotechnical structures have been developed. After the fabricating process of the geogrids is detailed, finite element (FE) simulations are conducted to analyze the strain distribution of geogrids and the strain transfer characteristics from geogrids to fiber optic. Results indicate that FBG should be deployed in the middle of the geogrids rib to make sure that uniform strain distribution along the FBG. Also, PVC protective sleeves, which are used to protect fiber optic when integrated with geogrids, have smaller strain transfer loss than nylon sleeves. Tensile experiments are conducted to test strain measurement performance of proposed geogrids, and the results demonstrate that proposed smart geogrids have good linearity and consistency. Temperature experiments show that FBG embedded in geogrids has higher temperature sensitivity, and the temperature induced error can be compensated by an extra FBG strain-independent sensor. Furthermore, designed smart geogrids are used in a geotechnical model test to monitor strain during tunnel excavation. The strain tendency measured by smart geogrids and traditional strain sensor agree very well. The results indicate that smart geogrids embedded with FBGs can be an effective method to measure strains for geological engineering related applications.

Early-Age Autogenous Shrinkage of High-Performance Concrete Columns by Embedded Fiber Bragg-Grating Sensor

2009 ◽  
Vol 419-420 ◽  
pp. 1-4 ◽  
Author(s):  
Ying Wei Yun ◽  
Ii Young Jang ◽  
Seong Kyum Kim ◽  
Seung Min Park
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
High Performance Concrete ◽  
Construction Material ◽  
Autogenous Shrinkage ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Early Age ◽  
Long Time ◽  
Sensor Temperature

High-performance concrete (HPC) as a promising construction material has been widely used in infrastructures and high-rise buildings etc. However, its pretty high autogenous shrinkage (AS) especially in its early age becomes one of the key problems endangering long-time durability of HPC structures. This paper carried out the early age AS research of large scaled HPC column specimens by embedded Fiber Bragg-Grating (FBG) strain sensor. Temperature compensation for FBG strain sensor by thermocouple was also attempted in this paper, and the results were reasonable and acceptable comparing with the result compensated by FBG temperature sensor. Reinforcement influence, size effect and temperature effect on HPC AS were also analyzed respectively in this paper.

A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror

2008 ◽  
Vol 6 (11) ◽  
pp. 818-820 ◽  
Author(s):  
许鸥 Ou Xu ◽  
鲁韶华 Shaohua Lu ◽  
冯素春 Suchun Feng ◽  
简水生 Shuisheng Jian
Keyword(s):  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating ◽  
High Birefringence ◽  
Fiber Loop Mirror ◽  
Loop Mirror ◽  
Fiber Loop

Study on strain transfer of embedded fiber Bragg grating sensors

2014 ◽  
Vol 53 (8) ◽  
pp. 085105 ◽  
Author(s):  
Rujun Wu ◽  
Bailin Zheng ◽  
Kunkun Fu ◽  
Pengfei He ◽  
Yuegang Tan
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Strain Transfer ◽  
Fiber Bragg Grating Sensors

Improved Accuracy of a Quasi-distributed Strain Sensor System by Using Fiber Bragg Grating Spectrum Restoration

2011 ◽  
Vol 61 (8) ◽  
pp. 750-754
Author(s):  
Gyoung-A KIM ◽  
 Jae-Soon YOON ◽  
Se-Jong BAIK ◽  
Kiegon IM*
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Improved Accuracy ◽  
Distributed Strain

Two-way Coupled Analysis of Strain Transfer of Fiber Bragg Grating Sensor

2020 ◽  
Vol 49 (8) ◽  
pp. 806005-806005
Author(s):  
吴入军 Ru-jun WU ◽  
张晓峰 Xiao-feng ZHANG ◽  
郑百林 Bai-lin ZHENG ◽  
陈田 Tian CHEN
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Coupled Analysis ◽  
Bragg Grating ◽  
Strain Transfer ◽  
Bragg Grating Sensor

A Glass-Fiber Packaged Fiber Bragg Grating Strain Sensor

2020 ◽  
Vol 57 (9) ◽  
pp. 090601
Author(s):  
陈剑 Chen Jian ◽  
郭永兴 Guo Yongxing ◽  
张礼朋 Zhang Lipeng
Keyword(s):  
Glass Fiber ◽  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating

Temperature-independent fiber Bragg grating strain sensor using bimetal cantilever

2005 ◽  
Vol 11 (4) ◽  
pp. 370-377 ◽  
Author(s):  
Keke Tian ◽  
Yuliang Liu ◽  
Qiming Wang
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating

Research on a Fiber Bragg Grating Strain Sensor for Tower Vibration

2014 ◽  
Vol 496-500 ◽  
pp. 1373-1375
Author(s):  
Jin Feng Geng ◽  
Hong Sheng Cai ◽  
Yong Tao Wei ◽  
Xiao Huan Shen ◽  
Jun Wei Dong
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Compensation ◽  
Strain Sensor ◽  
Compensation Method ◽  
Bragg Grating ◽  
Encapsulation Process ◽  
Tower Vibration

In order to monitor the key parts strain of tower vibration, design a fiber Bragg grating strain sensor, and introduce its structure, encapsulation process and temperature compensation method.

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