KCl concentration measurement using FBG sensor based on layered PI film

被引：0
|
作者：
Sun S. [1 ]
Yang P. [1 ]
Liu X. [1 ]
Lei Y. [1 ]
Liu Z. [1 ]
机构：
[1] School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing
来源：
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2023年 / 31卷 / 03期
关键词：
concentration; fiber Bragg grating; high sensitivity; layered polyimide;
D O I：
10.37188/OPE.20233103.0322
中图分类号：
学科分类号：
摘要：
A layered polyimide（PI）-fiber Bragg grating（FBG）concentration sensor was designed to monitor the concentration of a coolant in a nuclear cooling pipeline to solve various problems that exist in current measuring instruments，such as vulnerability to environmental interference，medium deposition，and difficulty in the distribution of multi-point monitoring. First，the design of a layered PI film-FBG concentration sensing mechanism was investigated based on a combination of the PI film water absorption characteristics，the principle of water molecule diffusion，and FBG sensing theory. Subsequently，the layered PI film-FBG concentration sensor was designed and fabricated，the concentration measurement experiment platform was built，and the concentration sensing experiment was conducted. Finally，the concentration characteristic curve of the PI film-coated FBG concentration sensor in a potassium chloride（KCl）solution was obtained，and its sensitivity and hysteresis characteristics were analyzed. The experimental results show that there is a linear relationship between the concentration and wavelength shift，and the fitting degree of the concentration characteristic curve is 0.9942. In addition，the maximum difference between the forward and reverse stroke output is 35 pm，and the average sensitivity of the sensor is 157.6 pm/ （mol·L-1），which are 7. 4 times and 49. 1 times higher than those of the one-layer annular PI film-coated FBG concentration sensor and corrosive FBG concentration sensor under the same conditions，respectively. Therefore，the sensor provides a new method for measuring the coolant concentration in nuclear industrial pipelines with high sensitivity，safety，and anti-electromagnetic interference. © 2023 Chinese Academy of Sciences. All rights reserved.
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页码：322 / 330
页数：8
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共 22 条
  • [1] JING F T, ZHU J P，, Et al., Research on radiation source term characteristics with large fuel rod break of PWR nuclear power plant ［J］, Nuclear Power Engineering, 42, S2, pp. 65-69, (2021)
  • [2] FU P T，, LU SH B，, LIANG SH, Et al., Research of relationship between fuel reliability and iodine isotope activity ratio <sup>131</sup>I/<sup>133</sup>I in PWR primary coolant ［J］, Atomic Energy Science and Technology, 56, 1, pp. 153-158, (2022)
  • [3] HE P，, CHEN J，, LI X F, Et al., Research on monitoring of reactor cavity cooling status for NPPs［J］, Nuclear Power Engineering, 41, 5, pp. 94-98, (2020)
  • [4] YU X Y, CHEN G M，, HU CH X，, Et al., Quantita-tion of cryoprotective agent by electrical conductivity measurement and its application in cryopreservation ［J］, Journal of Zhejiang University（Engineering Science, 51, 8, pp. 1640-1645, (2017)
  • [5] QI H B, LI SH, WANG Q SH, Et al., Optical property and concentration optical detection of poly-acrylamide solution［J］, Spectroscopy and Spectral Analysis, 37, 5, pp. 1466-1470, (2017)
  • [6] ZHAO B L，, Et al., Simultaneous measurements of refractive index and methane concentration through electromagnetic fano resonance coupling in all-dielectric metasurface［J］, Sensors（Basel，Switzerland）, 21, 11, (2021)
  • [7] LIAO Y B, YUAN L B，, TIAN Q., The 40 years of optical fiber sensors in China［J］, Acta Optica Si-nica, 38, 3, pp. 10-28, (2018)
  • [8] SUN X, WANG Q M，, LI ZH, Et al., Abnormal diagnosis of fiber Bragg grating strain gauges in health monitoring system［J］, Opt. Precision Eng, 29, 11, pp. 2581-2589, (2021)
  • [9] YANG H M, RAO CH, WU K, Et al., Gas quality monitoring for sterilizer based on fiber Bragg grating［J］, Opt. Precision Eng, 30, 3, pp. 264-273, (2022)
  • [10] KULKARNI V K, Et al., Concentration and refractive index sensor for methanol using short period grating fiber ［J］, Optik, 122, 2, pp. 89-91, (2011)
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