基于双LPFGs传感器的混泥土氯离子浓度激光测量  

Concrete Chloride Ion Concentration Laser Measuring Based on Two-LPFGs Sensor

作　　者：金露凡 曹哲昊 CAO Zhe-hao;JIN Lu-fan(Department of Material Engineering, Zhejiang Industry & Trade Vocational College,Wenzhou, 325003, China)

机构地区：[1]浙江工贸职业技术学院材料工程系

出　　处：《浙江工贸职业技术学院学报》2019年第2期59-64,共6页Journal of Zhejiang Industry & Trade Vocational College

基　　金：温州市公益性工业项目“新型可调谐光纤激光器及其稳定性的研究”(G20160014);2017年浙江省大学生科技创新活动计划暨新苗人才计划“基于双LPFGs传感器的混泥土氯离子浓度测量”(2017R446005)

摘　　要：氯离子渗透腐蚀是主要钢筋混凝土结构中损伤之一,极大降低混凝土结构的耐久性。为了检测混凝土中氯离子浓度,本文提出了一种简单、灵敏、可用于混凝土氯离子浓度检测的双长周期光纤光栅传感器及其检测方法。基于新的理论模型,通过测量经过双长周期光纤光栅的传输光功率,可以很容易地计算出溶液中氯离子浓度,测量范围可达5g/L^35g/L,误差范围为0.18%,同时克服测量过程中温度变化的影响。设计了一种微流体通道,可以克服弯曲和应变的影响。因此,本文所报道的双长周期光学光栅传感器有助于混凝土氯离子浓度的长期精确监测。Chloride ion permeation corrosion is one of the main damages in reinforced concrete structures, which greatly reduces the durability of concrete structures. A simple sensitive double long period fiber grating sensor and its detection method were proposed to detect the chloride ion concentration in concrete. The chloride ions concentration in the solution can be easily calculated by measuring the optical power through the double-long-period fiber Bragg grating. The measurement scope goes from 5g/L to 35g /L, and the margin of error range is 0.18%. Meanwhile, based on the new theoretical model, the influence of temperature change in the measurement process can be overcome. A microfluidic channel was designed to overcome the effects of bending and strain. Therefore, the double long period optical grating sensor reported in this paper is helpful for the long-term accurate monitoring of chloride ion concentration in concrete.

关 键 词：长周期光纤光栅 微流体通道 氯离子浓度 光功率 

分 类 号：TN241[电子电信—物理电子学]