Research on non-uniform strain profile reconstruction along fiber Bragg grating via genetic programming algorithm and interrelated experimental verification

2014 ◽  
Vol 315 ◽  
pp. 338-346 ◽  
Author(s):  
Shijie Zheng ◽  
Nan Zhang ◽  
Yanjun Xia ◽  
Hongtao Wang
Keyword(s):  
Genetic Programming ◽  
Fiber Bragg Grating ◽  
Experimental Verification ◽  
Uniform Strain ◽  
Programming Algorithm ◽  
Bragg Grating ◽  
Strain Profile ◽  
Profile Reconstruction

scholarly journals Experimental verification of the modified spring-mass theory of fiber Bragg grating accelerometers using transverse forces

2014 ◽  
Vol 53 (6) ◽  
pp. 1200 ◽  
Author(s):  
Kuo Li ◽  
Tommy H. T. Chan ◽  
Man Hong Yau ◽  
David P. Thambiratnam ◽  
Hwa Yaw Tam
Keyword(s):  
Fiber Bragg Grating ◽  
Experimental Verification ◽  
Bragg Grating

Application of Ant Colony Algorithm in Analyzing of Traverse Uniform Strain Reflective Spectrum of Fiber Bragg Grating

2010 ◽  
Vol 37 (2) ◽  
pp. 477-483
Author(s):  
吴飞 Wu Fei ◽  
邝敏敏 Kuang Minmin ◽  
赵静 Zhao Jing ◽  
张颖 Zhang Ying
Keyword(s):  
Fiber Bragg Grating ◽  
Ant Colony Algorithm ◽  
Ant Colony ◽  
Uniform Strain ◽  
Bragg Grating ◽  
Reflective Spectrum

Distributed Strain Reconstruction Based on a Fiber Bragg Grating Reflection Spectrum

2013 ◽  
Vol 20 (1) ◽  
pp. 53-64 ◽  
Author(s):  
Małgorzata Detka ◽  
Małgorzata Detka
Keyword(s):  
Fiber Bragg Grating ◽  
Reflection Spectrum ◽  
Matrix Method ◽  
Transition Matrix ◽  
Optimization Method ◽  
Bragg Grating ◽  
Original Strain ◽  
Single Digit ◽  
Strain Profile ◽  
Distributed Strain

Abstract In this paper, we present a synthesis of the parameters of the fiber Bragg grating (FBG) and the reconstruction of the distributed strain affecting the grating, performed by means of its reflection spectrum. For this purpose, we applied the transition matrix method and the Nelder-Mead nonlinear optimization method. Reconstruction results of the strain profile carried out on the basis of a simulated reflection spectrum as well as measured reflection spectrum of the FBG indicate good agreement with the original strain profile; the profile reconstruction errors are within the single digit percentage range. We can conclude that the Nelder-Mead optimization method combined with the transition matrix method can be used for distributed sensing problems.

Non-uniform strain measurement along a fiber Bragg grating using optical frequency domain reflectometry

2013 ◽  
Vol 11 (10) ◽  
pp. 100603-100608 ◽  
Author(s):  
Fangdong Zhu Fangdong Zhu ◽  
Dongsheng Zhang Dongsheng Zhang ◽  
Peng Fan Peng Fan ◽  
Litong Li Litong Li ◽  
Yongxing Guo Yongxing Guo
Keyword(s):  
Frequency Domain ◽  
Fiber Bragg Grating ◽  
Strain Measurement ◽  
Uniform Strain ◽  
Bragg Grating ◽  
Optical Frequency ◽  
Optical Frequency Domain Reflectometry ◽  
Frequency Domain Reflectometry

Simulating on a New Elastic Element of FBG Accelerometer

2013 ◽  
Vol 655-657 ◽  
pp. 689-692
Author(s):  
Jun Shao ◽  
Zhen An Jia ◽  
Jun Hua Liu
Keyword(s):  
Fiber Bragg Grating ◽  
Elastic Element ◽  
Uniform Strain ◽  
Bragg Grating ◽  
Single Beam ◽  
Cross Axis

A new elastic element of fiber Bragg grating(FBG) accelerometer which is four peripheral clamped trapezoidal beams is developed. The simulation of this elastic element with ANSYS is carried out. From the results, it shows that as an elastic element, four beams have the advantages of lower cross-axis sensitivity which is smaller than 52 dB and nearly uniform strain along the grating area. In addition, its work frequency is higher than the single beam constituting four beams. This kind of elastic element not only can be used with fiber Bragg grating accelerometer, but also other types of sensors.

Guided Waves Mode Filtering Using Fiber Bragg Grating Sensors

2021 ◽  
Author(s):  
Rohan Soman ◽  
Pawel Kudela ◽  
Maciej Radzienski ◽  
Wieslaw Ostachowicz
Keyword(s):  
Fiber Bragg Grating ◽  
Guided Waves ◽  
Processing Technique ◽  
Gauge Length ◽  
Uniform Strain ◽  
Bragg Grating ◽  
Large Area ◽  
Signal Processing Technique ◽  
Fbg Sensors ◽  
Limited Sensitivity

Abstract Guided waves (GW) allow fast inspection of a large area and hence have received great interest from the structural health monitoring (SHM) community. Fiber Bragg grating (FBG) sensors offer several advantages but their use for GW sensing has been limited due to their limited sensitivity. FBG sensors in the edge-filtering configuration have overcome this issue with sensitivity and there is a renewed interest in their use. It has been seen that depending on the ratio of the wavelength of the propagating wave to the gauge length of the FBG, the mechanism of the transduction of the wave measurement is different. A large ratio leads to a more uniform strain over the FBG leading to a shift in the frequency, while a non-uniform strain due to a short wavelength, leads to the peak widening. The present paper studies this phenomena and develops a signal processing technique for the filtering of the modes.

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