基于光纤折射率传感原理的溶液密度测定方法  

Determination of solution density based on fiber refractive index sensing principle

作　　者：黄振健[1] 黄旭光[1] 陈基焕[1] 谢金玲[1] 

机构地区：[1]华南师范大学光子信息技术广东省高校重点实验室,广东广州510006

出　　处：《光电子．激光》2011年第3期409-413,共5页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展计划(973)资助项目(2010CB327805);广东省科技计划项目资助项目(2009B090300190)

摘　　要：提出了一种新颖的基于光纤折射率传感原理的溶液密度测定方法,适用于已知溶液中溶质成分时密度的测量。分别测定了NaCl和KNO3溶液在恒定温度(20℃)下不同浓度时的折射率,与溶液的密度进行对比研究发现,溶液折射率与密度成线性关系,只要测得溶液的折射率就能测定溶液的密度。应用本方法对NaCl和KNO3溶液分别进行密度测量,实验结果与理论十分吻合,测量精度可达到10-5g/ml量级。在不同温度下,用本方法对NaCl和KNO3溶液进行密度测量,实验结果与文献值一致,证实了本方法对测试环境的适用性强。对本方法进行了稳定性测试,效果良好。A novel determination of solution density based on fiber refractive index sensing principle is first proved and studied in this paper.This method is suitable for the determination of solution density with known solute.Refractive indices of the NaCl and KNO 3 solutions with different concentrations at constant temperature（20 ℃） were measured respectively by applying this method.The linear relationship between refractive index and solution density is found.So solution density can be determined if the refractive index is measured.Densities of NaCl and KNO 3 solutions are determined by this method,and the results are in good agreement with the theory.Measurement precision is at the order of 10-3 g/ml.The effect of temperature and the stability test are further studied,and the results are very good.

关 键 词：光纤光学 密度 光纤传感 折射率 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]