高精度光纤荧光测温法的稳定性研究  

A Study for Stability of High Precision Optical Fiber Fluorescent Temperature Measurement System

作　　者：贾丹平[1] 林乐乐[1] 苑玮琦[1] 林应文[1] 

机构地区：[1]沈阳工业大学,辽宁沈阳110023

出　　处：《计量学报》2008年第2期129-133,共5页Acta Metrologica Sinica

基　　金：辽宁省自然科学基金(20052044);辽宁省教育厅高校科研项目计划(202063304)

摘　　要：荧光测温方法的分析通常是基于指数曲线而进行的,实践中发现实际的余辉曲线与指数曲线有差别,是影响仪器稳定性的关键因素。从荧光发光机理出发,分析了产生非指数的根源,提出了用截断归一法来评价余辉曲线的非指数性,通过几种代表性的荧光材料的光谱特性和截断归一化分析实验,验证了理论分析的正确性,给出了改善非指数性的措施。在此措施下使测量系统达到0.1℃的分辨率和±0.2℃的精度,可以现场实时进行校准,测温探头可以互换,已用于微波加热医学生物研究中。Generally, the theoretical analysis of the fluorescent life time temperature measurement is based on the assumption of the exponential life time characteristic, but in practice, the actual curve of the fluorescent are differ from exponential. This is the key influence on the stability of the high-precision fluorescent measurement system. The differences are analyzed base on the theoretical mechanism of fluorescent, and a cutting and normalized method is given to describe the degree of the non-exponent of the actual fluorescent curve defer from the exponential curve. Several kinds of typical fluorescence materials spectrum and its cutting and normalized experiment results verify this theoretical analysis. Some effective measures to improve the non-exponent of the system are taken and are applied to a temperature measurement system based on actual fluorescent curve analysis with resolution 0.1℃, precisions ＋ 0.2℃, and real-time calibration is carried on. This system has already been used in the research of microwave heating medical biology.

关 键 词：计量学 温度测量 荧光 稳定性 归一化 

分 类 号：TB942[一般工业技术—计量学]