一种基于菲涅耳原理的光纤盐度测量方法

为了测量不同盐度条件下的海水折射率的变化,进而得到海水的盐度,提出了一种应用菲涅耳定理设计的光纤盐度测量方法。介绍了测量原理和初步的实验结果。该方法简单、快速、准确度及灵敏度高。结果表明,此方法在测量盐度时分辨率好于0.4%,可应用于海水盐度的实时监测等场合;理论上可以测量任何气体、液体和固体的浓度(折射率),适用于工业在线监测物质的浓度(折射率)。

A Fiber Optic Salinity Measurement Method Based on the Fresnel Principle

Abstract: Objetive: In order to measure the salinity of the salt-water, we try to measure the refractive of the salt solution under different condition. Method :Based on the Fresnel principle, a method of the seawater salinity measurement using fiber is introduced. The merits of this method are simple, fast, high accuracy and sensitivity. Result:The experiments indicate that the resolution is better than 0.4%. Conclusion:This method can be applied in the real-time monitoring of the seawater salinity. The method also can be widely used in the field of industrial on-line concentration or refractive detection.