Simultaneous discrimination of strain and temperature using dual-gratings in one fiber

Jiang, Nuan; Zhu, Hai; Bao, Kai; Hu, Yongming

doi:10.1016/j.ijleo.2015.07.179

Cited by 22 publications

(8 citation statements)

References 21 publications

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“…The sensitivity of the proposed sensor was 3.5 pm/με. In another work, a slightly tapered optical fiber with an inner air cavity is proposed and demonstrated for simultaneous strain and temperature measurements [ 33 ]. The sensing device was fabricated by using femtosecond laser micromachining together with fusion splicing techniques, followed by a short-duration tapering process.…”

Section: Comparison Of This Sensor With Other Fos For Strain And/omentioning

confidence: 99%

D-Shaped Polarization Maintaining Fiber Sensor for Strain and Temperature Monitoring

Qazi

Mohammad

Ahmad

et al. 2016

Sensors

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A D-shaped polarization-maintaining fiber (PMF) as fiber optic sensor for the simultaneous monitoring of strain and the surrounding temperature is presented. A mechanical end and edge polishing system with aluminum oxide polishing film is utilized to perform sequential polishing on one side (lengthwise) of the PMF in order to fabricate a D-shaped cross-section. Experimental results show that the proposed sensor has high sensitivity of 46 pm/µε and 130 pm/°C for strain and temperature, respectively, which is significantly higher than other recently reported work (mainly from 2013) related to fiber optic sensors. The easy fabrication method, high sensitivity, and good linearity make this sensing device applicable in various applications such as health monitoring and spatial analysis of engineering structures.

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Section: Comparison Of This Sensor With Other Fos For Strain And/omentioning

confidence: 99%

D-Shaped Polarization Maintaining Fiber Sensor for Strain and Temperature Monitoring

Qazi

Mohammad

Ahmad

et al. 2016

Sensors

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“…The proposed techniques fall into three categories. In the rst category, more than one uniform FBG is used [19][20][21] and in the second category, only one special (nonuniform) FBG is adopted for simultaneous measurement [22][23][24][25][26]. Both categories have disadvantages such as the use of more than one uniform FBG, complicated setup and fabrication of special FBGs, excessive use of spectral sources, and di cult accessibility.…”

Section: Introductionmentioning

confidence: 99%

Comparison of FWHM and peak power of FBG spectrum for simultaneous measurement of strain and temperature based on tilted cantilever beam

Mansoursamaei

Gholampour

Malakzadeh

2022

Preprint

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Among the optical fiber sensors, fiber Bragg grating (FBG) has found remarkable attraction and many applications due to its ability to measure all environmental parameters, high accuracy and sensitivity, easy installation, and low price. The sensor's ability to simultaneous measurement of two environmental (physical) parameters, especially strain and temperature, has made it even more demanding. Recently, two techniques based on FWHM and peak power changes of FBG spectrum have been proposed for simultaneous measurement of temperature and strain that use a uniform FBG on a tilted cantilever beam. In this article, we evaluate and compare both techniques and demonstrate that both are equivalent and have almost similar behaviour but do not have the same applications. We find that at the low strain range the peak power technique is more accurate while at the high strain range the FWHM technique has better accuracy. Therefore, in applications such as monitoring civil structures that have a high strain range, it is better to use the FWHM technique and in some delicate industrial applications with a low strain range, the peak power technique is used.

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“…The techniques have mainly been based on detecting two physical indicators in reflection spectrum of FBG sensors that have different sensitivities to strain and temperature. Since there is only one physical indicator, Bragg wavelength shift, in a reflection spectrum of each uniform FBG, temperature and strain changes which both cause the Bragg wavelength shift, could not be identified by means of just one uniform FBG [29][30]. Thus, researchers mainly use more than one uniform FBG which causes several drawbacks including the complexities in the setup, overused of spectral sources and their costs.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of temperature and strain based on peak power changes and wavelength shift using only one uniform fiber bragg grating

Malakzadeh

Mansoursamaei²,

Pashaie

2021

Opt Quant Electron

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Many efforts have been devoted to simultaneous measurements of strain and temperature by FBG sensors and several improving techniques have been resulted and implemented on the measurement. Most of them are based on two or more FBGs configurations or a single non-uniform FBG implementation. We propose simultaneous measurement of temperature and strain based on peak power changes and Bragg wavelength shifts using only one uniform fiber Bragg grating (FBG). We placed a ramp with the angle of θ, similar to a tilted cantilever beam, on an assumptive structure and stuck a uniform FBG on it. When a uniform strain applied to a structure, the cantilever beam converts it to a non-uniform strain distribution along with itself and consequently the uniform FBG. By creating this non-uniform strain distribution, the peak power of the reflection spectrum of the FBG will be sensitive to strain changes. In addition, the Bragg wavelength shift will be sensitive to both temperature and strain parameters. According to our simulation, temperature sensitivity of 14.15 pm/℃ is obtained for FBG sensor without any changes in the peak power. The strain sensitivity of 0.7837 pm/με, and a nonlinear sensitivity according to a quadratic function for peak power variation are also observed.

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Simultaneous discrimination of strain and temperature using dual-gratings in one fiber

Cited by 22 publications

References 21 publications

D-Shaped Polarization Maintaining Fiber Sensor for Strain and Temperature Monitoring

D-Shaped Polarization Maintaining Fiber Sensor for Strain and Temperature Monitoring

Comparison of FWHM and peak power of FBG spectrum for simultaneous measurement of strain and temperature based on tilted cantilever beam

Simultaneous measurement of temperature and strain based on peak power changes and wavelength shift using only one uniform fiber bragg grating

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