Simultaneous measurement of strain and temperature using Fabry–Pérot interferometry and antiresonant mechanism in a hollow-core fiber

He, Chun; Zhou, Cheng; Zhou, Qian; Xie, Shiyi; Xiao, Mengzhe; Tian, Jiajun; Yao, Yong

doi:10.3788/col202119.041201

Cited by 17 publications

(8 citation statements)

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“…Because the degree of polarization within the ash is significantly more than that of air, the direction of F DEP corresponds to the direction of the electric field gradient rise. The degree of inhomogeneity of the electric field determines F DEP [30], therefore the dielectrophoretic force on the ash under the AC line is more significant than that under the DC line. According to the electric dipole moment theory, which can be shown as follows:…”

Section: Motion Control Equation Of Ashmentioning

confidence: 99%

Simulation analysis on the synergistic effect of vegetation ashes and charged particles on the gap electric field distortion

Lin,

Gou,

Zhang

et al. 2024

J. Phys. D: Appl. Phys.

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Hill fires, a sort of ultra-natural disaster that poses a severe threat to the safe and stable operation of transmission lines, have become more frequent in recent years. Currently, the modelling research on the transmission line gap electric field distortion under hill fire conditions does not consider the synergistic effect of charged particles and ash particles, which would lead to the imperfect gap electric field distortion mechanism. Herein, a coupled multi-physics field simulation model of electric, thermal, fluid, chemical field and particle motion was constructed to analyze the electric field distribution and particle motion. Compared to the related simulation models, this study improves the simulation accuracy by around 407% by optimizing the structure and parameters of the simulation model. The results show that the percentage of ash entering the examined region of the AC conductor was 34.1% higher, and the percentage of connected ash was 45% higher, increasing the likelihood of gap breakdown compared to the DC conductor; the charge of ash (10-14-10-11) is significantly less than the saturation charge of ash (≥10-3). Therefore, the charged particles change the motion characteristics of the ash primarily through the electric field force and dielectrophoresis force, while the ash-induced distortion of the electric field affects the spatial distribution of the charged particles, eventually, the background electric field undergoes significant distortion by the synergistic effect of the two. The results examine the inherent mechanism of gap electric field distortion at the microscopic level, which can provide theoretical support for understanding the transition phase of transmission line gaps from insulation to breakdown under hill fire conditions.

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Section: Motion Control Equation Of Ashmentioning

confidence: 99%

Simulation analysis on the synergistic effect of vegetation ashes and charged particles on the gap electric field distortion

Lin,

Gou,

Zhang

et al. 2024

J. Phys. D: Appl. Phys.

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“…Such sensors have been widely applied in various fields, including environmental protection, food storage, health care, and industrial design. With the development of fiber-optic sensing technology, various temperature sensing structures have been proposed, like fiber Bragg gratings (FBGs) [5][6][7] , Mach-Zehnder interferometers (MZIs) [8][9][10] , Michelson interferometers (MIs) [11,12] , and Fabry-Perot interferometers (FPIs) [13][14][15] . However, most of these sensing schemes are passive, resulting in low signal-to-noise ratio (SNR) and resolution.…”

Section: Introductionmentioning

confidence: 99%

Temperature-sensing scheme based on a passively mode-locked fiber laser via beat frequency demodulation

et al. 2023

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In this paper, we propose a temperature-sensing scheme utilizing a passively mode-locked fiber laser combined with the beat frequency demodulation system. The erbium-doped fiber is used in the laser ring cavity to provide the gain and different lengths of single-mode fibers inserted into the fiber ring cavity operate as the sensing element. Different temperature sensitivities have been acquired in the experiment by monitoring the beat frequency signals at different frequencies. The experimental results indicate that the beat frequency shift has a good linear response to the temperature change. The sensitivity of the proposed sensor is about −44 kHz/°C when the monitored beat frequency signal is about 10 GHz and the ratio of the sensing fiber to the overall length of the laser cavity is 10 m/17.5 m, while the signal-to-noise ratio (SNR) of the monitored signal is approximately 30 dB. The proposed temperature-sensing scheme enjoys attractive features such as tailorable high sensitivity, good reliability, high SNR, and low cost, and is considered to have great potential in practical sensing applications.

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“…Optical fiber sensors have the advantages of strong resistance to electromagnetic interference, high sensitivity, no operating current, and ability to work in complex environments [1] . Therefore, they are widely used in temperature [2] , refractive index (RI) [3] , bending [4] , strain [5,6] , liquid level [7] , and other measurements [8] , especially in chemistry and biotechnology applications [9] . Among them, liquid level is an important parameter in chemical industry production, fuel storage, water level monitoring, medical testing, dose control, and biochemical progress fields.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive liquid level sensor based on slice-shaped composite long period fiber grating

et al. 2022

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In this paper, a novel liquid level sensor with ultra-high sensitivity is proposed. The proposed sensor is configured by a sliceshaped composite long period fiber grating (SSC-LPFG). The SSC-LPFG is prepared by polishing two opposite sides of a composite multimode-single-mode-multimode fiber structure using a CO 2 laser. The method improves the sensitivity of the sensor to external environment. Based on the simulation calculation, a liquid level sensor with a length of 3 mm is designed. The experimental transmission spectrum agrees well with the simulation result. The experimental results show that the sensitivity reaches 7080 pm/mm in the liquid level range of 0-1400 μm in water. The temperature sensitivity is 24.52 pm/°C in the range of 20°C-90°C. Due to the ultra-high sensitivity, good linearity, and compact structure, the SSC-LPFG has potential application in the field of high-precision liquid level measurement.

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Simultaneous measurement of strain and temperature using Fabry–Pérot interferometry and antiresonant mechanism in a hollow-core fiber

Cited by 17 publications

References 0 publications

Simulation analysis on the synergistic effect of vegetation ashes and charged particles on the gap electric field distortion

Simulation analysis on the synergistic effect of vegetation ashes and charged particles on the gap electric field distortion

Temperature-sensing scheme based on a passively mode-locked fiber laser via beat frequency demodulation

Ultrasensitive liquid level sensor based on slice-shaped composite long period fiber grating

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