山东建筑大学学报2025，Vol.40Issue(3)：79-84,92,7.DOI:10.12077/sdjz.2025.03.010
基于倾斜光纤光栅的硫酸溶液折射率监测系统研究
Study on refractive index monitoring system of sulfuric acid solution based on tilted fibre grating
摘要
Abstract
To address the demand for high-precision,real-time,online monitoring of lead-acid batteries,this study proposes an all-fiber refractive index monitoring method for sulfuric acid solutions based on the refractive index sensitivity mechanism of cladding mode coupling in Tilted Fiber Bragg grating(TFBG).A TFBG-based sensing probe was designed and encapsulated,and a demodulation system was established.The quantitative testing was conducted for sulfuric acid solution with refractive indices ranging from 1.351 2 to 1.375 2 RIU.The results demonstrate that 16 cladding modes were selected within the 1 529～1 539 nm wavelength band,where the center wavelength shifted toward longer wavelength with the increasing refractive index,exhibiting a pronounced red shift in the transmission spectra.The center wavelengths of cladding modes of different orders showed strong linear relationships with the refractive indices of the sulfuric acid solution,with fitting coefficients reaching up to 0.99.Within the effective refractive index range,higher-order cladding modes exhibited more pronounced shifts than lower-order modes,modes,indicating greater sensitivity to changes in the external refractive index.The highest linearity achieved was 0.999,with a sensitivity of 16.572 00 nm/RIU.关键词
倾斜光纤布拉格光栅/铅酸蓄电池/折射率监测/硫酸浓度监测Key words
Tilted Fibre Bragg Grating/lead-acid batteries/refractive index monitoring/sulphuric acid concentration monitoring分类
信息技术与安全科学引用本文复制引用
孙晓,艾森,葛吉瑶,倪家升,赵燕杰..基于倾斜光纤光栅的硫酸溶液折射率监测系统研究[J].山东建筑大学学报,2025,40(3):79-84,92,7.基金项目
山东省重点研发计划项目(公益类)(2019GSF111011) （公益类）
山东省自然科学基金项目(ZR2020MF109) （ZR2020MF109）
山东省重点研发计划(重大科技创新工程)项目(2020CXGC010204) （重大科技创新工程）
国家自然基金联合基金项目(U200620080) （U200620080）
齐鲁工业大学科教产试点工程基础研究类项目(2022PX050) （2022PX050）
