Implementation of a distributed temperature sensor utilising a chirped Moiré fibre Bragg grating

Gillooly, A.; Zhang, Lin; Bennion, I.

doi:10.1016/j.optcom.2004.09.011

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…Recently, simultaneous multi-parameter measurements [3−4] , fully distributed [5] and quasi-distribution FBG [6−7] sensors are focused on. In the fully distributed sensing, we need to study the inverse problem of getting the grating parameters, for example temperature profile applied on the FBG, from the known reflection spectrum.…”

Section: Introductionmentioning

confidence: 99%

Modified simulated annealing evolutionary algorithm for fully distributed fiber Bragg grating temperature sensing

Chen

et al. 2011

J. Shanghai Univ.(Engl. Ed.)

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In this paper, we present a simple and fast spectra inversion method to reconstruct the temperature distribution along single fiber Bragg grating (FBG) temperature sensor. This is a fully distributed sensing method based on the simulated annealing evolutionary (SAE) algorithm. Several modifications are made to improve the algorithm efficiency, including choosing the most superior chromosome, setting up the boundary of every gene according to the density of resonance peaks of the reflection spectrum, and dynamically modifying the boundary with the algorithm running. Numerical simulation results show that both the convergence rate and the fluctuation are significantly improved. A high spatial temperature resolution of 0.25 mm has been achieved at the time cost of 86 s.

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Section: Introductionmentioning

confidence: 99%

Modified simulated annealing evolutionary algorithm for fully distributed fiber Bragg grating temperature sensing

Chen

et al. 2011

J. Shanghai Univ.(Engl. Ed.)

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“…A change in the ambient temperature can also cause a gradient in both the effective refractive index and the period of the grating due to the temperature dependence of the refractive index and elastic properties of the fiber. This is the basic concept behind all FBG based temperature sensing devices and temperature tunable filters [11][12][13][14][15][16][17][18][19][20].…”

Section: Principle Of Wavelength Tuning Of Fbgmentioning

confidence: 99%

“…The temperature sensitivity of FBGs can be utilized for applications like temperature sensor [15], distributed temperature sensing [16], measuring heat flow [17], measuring temperature in harsh nuclear environments [18] and high temperature measurements [19] and temperature measurement in medical applications [20].…”

Section: Sensors Based On Wavelength Tuning Through Thermal Loadingmentioning

confidence: 99%

“…The striking advantage of an FBG sensor is that the sensing parameter is wavelength encoded and therefore does not depend on light intensity levels or power loss. FBG sensors are currently being used for measuring a variety of parameters including strain [9][10][11][12][13][14], temperature [15][16][17][18][19][20] and humidity [21], and for numerous other sensing applications in the field of science, engineering and medicine [22][23][24][25][26][27][28].…”

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confidence: 99%

“…16 Graph showing the wavelength shift with respect to t for X and Y polarizations, AX X and AX, y for £=5 MPa (jr=0.3) 81…”

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confidence: 99%

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Enhanced transverse wavelength tuning of fiber Bragg gratings for sensing applications

Paul¹

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Fiber Bragg grating (FBG) based strain sensors have found a variety of applications in the last two decades. Most of these applications utilize the wavelength tuning of FBGs through an axially induced strain because of the high axial load sensitivity in comparison to lateral loading. However, wavelength tuning through lateral or transverse loading is attractive for applications like structural health monitoring, damage detection etc, owing to the flexibility in mounting or embedding the sensor. The wavelength tuning of the FBG sensors through lateral loading has the advantage of easy surface mounting, ruggedness, long term stability, structural integrity and more resistant to vibration. However, the potentials of wavelength tuning through lateral loading are yet to be utilized by overcoming its inherent limitations of low lateral pressure sensitivity, narrow tuning range and stress induced birefringence. In order to understand these problems, various studies regarding the lateral loading process are performed initially. These studies include analysis of influence of the pressurizing media (or contact media) and contact conditions on the wavelength response characteristics of the FBGs. It is found that the material of the pressurizing media, its configuration and the contact friction play major roles in lateral pressure tuning (LPT) process and significant enhancement in performance can be achieved by optimizing these parameters. The lateral pressure sensitivity is high for a contact media with low value of Young's modulus. The sensitivity also increases with both the thickness of the contact plate and the contact friction between the fiber and the contact media. However, using an optimized contact media always may not be feasible in all working conditions. ni

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Phase derivative thermo-spatiogram for distributed temperature sensing based on chirped grating-Michelson Interferometer

Tan

Lim

Zaini

et al. 2018

Sensors and Actuators A: Physical

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Implementation of a distributed temperature sensor utilising a chirped Moiré fibre Bragg grating

Cited by 6 publications

References 11 publications

Modified simulated annealing evolutionary algorithm for fully distributed fiber Bragg grating temperature sensing

Modified simulated annealing evolutionary algorithm for fully distributed fiber Bragg grating temperature sensing

Enhanced transverse wavelength tuning of fiber Bragg gratings for sensing applications

Phase derivative thermo-spatiogram for distributed temperature sensing based on chirped grating-Michelson Interferometer

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