New Method of Monitoring Tunnel Feet-Lock Pipe (TFP) Mechanics Using Fiber Bragg Grating (FBG)

2018 ◽  
Vol 48 (4) ◽  
pp. 20170364 ◽  
Author(s):  
Yanbin Luo ◽  
Pengsheng Diao ◽  
Jianxun Chen ◽  
Dong Li ◽  
Yalong Guo ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
New Method ◽  
Bragg Grating

A new method for fiber Bragg grating wavelength demodulation with calibration

2006 ◽  
Author(s):  
Jian-wei Fu ◽  
Li-zhi Xiao ◽  
Yuan-zhong Zhang ◽  
Xiao-liang Zhao ◽  
Hai-feng Chen
Keyword(s):  
Fiber Bragg Grating ◽  
New Method ◽  
Bragg Grating

scholarly journals New Method of Temperature and Strain Decoupling Based on Directivity of Fiber Bragg Grating Sensing

2021 ◽  
Vol 2101 (1) ◽  
pp. 012023
Author(s):  
Xiao Huang ◽  
Zhenkun Jin ◽  
Qing Shen
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Experimental Analysis ◽  
Strain Measurement ◽  
The Other ◽  
New Method ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Influence Of Temperature ◽  
Sensing Characteristics

Abstract Fiber Bragg Grating (FBG) has been widely used in temperature and strain measurement. Its center wavelength drift is affected by both temperature and strain. The influence of temperature and strain on center wavelength should be decoupled when measuring. In this paper, the sensing characteristics of FBG which pasted at different angles were simulated and analyzed, and it was found that FBG sensing for strain has strong directivity. A dual FBG composite construction based on the directivity of FBG sensing was proposed. Two FBGs were at an Angle of 62°. One FBG was sensitive to both temperature and strain, and the other was only sensitive to temperature. The structure can realize the decoupling of temperature and strain, and it doesn’t depend on feature of cantilever beam. It was verified by experimental analysis that the decoupling result was good by utilizing the combined FBG structure, and decoupling was realized easily.

New method of fiber Bragg grating demodulation technique and applied in detection of equipment

2009 ◽  
Author(s):  
Bing Zhao ◽  
Zhi-Li Zhang ◽  
Qi-Yuan Zhong ◽  
Hongliang Tu ◽  
Lilong Tan
Keyword(s):  
Fiber Bragg Grating ◽  
New Method ◽  
Bragg Grating

A new method based on Fiber Bragg grating sensor for the milling force measurement

Mechatronics ◽  
2015 ◽  
Vol 31 ◽  
pp. 22-29 ◽  
Author(s):  
Mingyao Liu ◽  
Zhijian Zhang ◽  
Zude Zhou ◽  
Shuang Peng ◽  
Yuegang Tan
Keyword(s):  
Fiber Bragg Grating ◽  
Force Measurement ◽  
Fiber Bragg Grating Sensor ◽  
New Method ◽  
Bragg Grating ◽  
Milling Force ◽  
Bragg Grating Sensor

scholarly journals Fiber Bragg Grating Sensors For Failure Detection Of Fip Chip BGA In Four-Point Bending Test

2021 ◽  
Author(s):  
Rasha Hussain
Keyword(s):  
Fiber Bragg Grating ◽  
Flip Chip ◽  
Structural Integrity ◽  
Failure Detection ◽  
New Method ◽  
Bending Test ◽  
Bragg Grating ◽  
Test Configuration ◽  
Mechanical Bending ◽  
Free Solder

Maintaining structural integrity is an important issue for advanced flip chip ball grid array (FC-BFA) packages especially due to the use of Pb-free solder replacing the Pb-contained solders and the large package size induced mechanical vulnerability. For such packages, the mechanical bending causes fracture in the interconnecting plastic PWB. To determine the critical load becomes a challenge to assembly manufacturers since the conventional testing methods based on monitoring electric continuity of the daisy chained solder joints fail to detect the PWB de-bonding near the interconnect. This thesis researches a new method that uses the Fiber Bragg Grating sensor to detect the interconnect fracture failure of 55 mm lead-free FC-BGA under four-point bend test. Experimental setups and procedures are studied, a proper test configuration is determined and a series of testing performed. The validity of the new method in monitoring the solder joint de-bonding is proved through analyzing the test results, which shows that the FBG sensors are sensitive to capture the onset of the fracture in different cases.

scholarly journals Fiber Bragg Grating Sensors For Failure Detection Of Fip Chip BGA In Four-Point Bending Test

2021 ◽  
Author(s):  
Rasha Hussain
Keyword(s):  
Fiber Bragg Grating ◽  
Flip Chip ◽  
Structural Integrity ◽  
Failure Detection ◽  
New Method ◽  
Bending Test ◽  
Bragg Grating ◽  
Test Configuration ◽  
Mechanical Bending ◽  
Free Solder

Maintaining structural integrity is an important issue for advanced flip chip ball grid array (FC-BFA) packages especially due to the use of Pb-free solder replacing the Pb-contained solders and the large package size induced mechanical vulnerability. For such packages, the mechanical bending causes fracture in the interconnecting plastic PWB. To determine the critical load becomes a challenge to assembly manufacturers since the conventional testing methods based on monitoring electric continuity of the daisy chained solder joints fail to detect the PWB de-bonding near the interconnect. This thesis researches a new method that uses the Fiber Bragg Grating sensor to detect the interconnect fracture failure of 55 mm lead-free FC-BGA under four-point bend test. Experimental setups and procedures are studied, a proper test configuration is determined and a series of testing performed. The validity of the new method in monitoring the solder joint de-bonding is proved through analyzing the test results, which shows that the FBG sensors are sensitive to capture the onset of the fracture in different cases.

A new method for scour monitoring based on fiber Bragg grating

Measurement ◽  
2018 ◽  
Vol 127 ◽  
pp. 431-435 ◽  
Author(s):  
Yong Ding ◽  
Qingxiong Yao ◽  
Zhendong Zhang ◽  
Xin Wang ◽  
Tengteng Yan ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
New Method ◽  
Bragg Grating ◽  
Scour Monitoring

scholarly journals A new method for sampled fiber Bragg grating fabrication by use of both femtosecond laser and CO_2 laser

2010 ◽  
Vol 18 (3) ◽  
pp. 2646 ◽  
Author(s):  
Xia Fang ◽  
X. Y. He ◽  
C. R. Liao ◽  
Minwei Yang ◽  
D. N. Wang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
New Method ◽  
Bragg Grating ◽  
Grating Fabrication ◽  
Sampled Fiber Bragg Grating
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