一种基于折射率法检测海水盐度的装置设计

Design of a Device for Measuring Seawater Salinity Based on Refractive Index Method

针对光纤传感技术中盐度检测分辨率低的问题,提出了一种基于折射率法检测海水盐度的方案.根据折射光线在不同盐度溶液中产生偏移的原理,采用折射率差动测量和激光扩束器,设计了盐度检测装置系统.理论分析和实验结果表明:通过改变透镜焦距或增大平凹透镜与楔形水槽倾斜玻璃面的间距可提高系统分辨率.装置经过结构创新,为光纤传感技术在海水盐度监测领域的应用提供了一种新途径.

Aiming at the problem of low resolution of salinity detection in fiber optic sensing technology,a method of salinity detection based on refractive index method is proposed in this study.According to the principle that refracted light produces deviation in different salinity solutions,the salinity detection system was designed by using refractive index differential measurement and laser beam expander.Theoretical analysis and experimental results show that the resolution of the system can be improved by changing the focal length of the lens or increasing the distance between the plane-concave lens and the tilted glass surface of the wedge flume.Through structural innovation,the device provides a new way for the application of optical fiber sensing technology in the field of seawater salinity monitoring.