双锥形塑料光纤溶解氧浓度的测定  

Dissolved Oxygen Sensor Based on Biconical Shaped Plastic Optical Fiber

作　　者：初凤红[1] 杨俊杰[1] 蔡海文[2] 瞿荣辉[2] 方祖捷[2] 

机构地区：[1]上海电力学院计算机与信息工程学院,上海200090 [2]中国科学院上海光学精密机械研究所信息光学实验室,上海201800

出　　处：《光电工程》2009年第3期84-87,共4页Opto-Electronic Engineering

基　　金：上海市教育委员会科研创新项目(09ZZ185、09YZ337);上海市教育发展基金会晨光计划(2007CG66)

摘　　要：本文利用荧光标记物的荧光猝灭效应测量水中溶解氧浓度。以塑料光纤作为传感和传光元件,为了提高溶解氧传感的灵敏度,传感头制成双锥形。以邻菲咯啉钌作为荧光标记物,用溶胶-凝胶法制备含有荧光标记物的敏感材料。根据Stern-Volmer方程,通过测量荧光标记物的荧光强度来测定溶解氧的浓度。文中提出了一个模型来解释荧光强度与溶解氧浓度之间的亚线性关系。通过对所测得的曲线进行拟合,可以得出敏感膜约有85%的厚度不受氧漂白的作用。A dissolved oxygen sensor is reported based on plastic optical fiber as sensor head and light transmit element. In order to enhance the systems sensitivity, the sensor head is bent into biconical-shape, and dissolved oxygen concentration is measured based on fluorescence quenching phenomenon. Dichlorotris （1, 10-phenanthroline） ruthenium （II） is used as fluorescence indicator and Sol-gel method is used to prepare the sensor material. According to Stem-Volmer equation, the dissolved oxygen concentration is linear with fluorescence intensity. We measure the relationship between dissolved oxygen concentration and fluorescence intensity and find that they are sub-linearity. In order to explain this phenomenon, we propose a model. By conic fitting the measured curve, the conclusion is drawn that 85% sensitivity film is not affected by dissolved oxygen.

关 键 词：溶解氧传感 塑料光纤 荧光强度 敏感材料 

分 类 号：TN25[电子电信—物理电子学]