微波场中测温技术的实现

发布时间：2018-03-24 18:34

本文选题：荧光光纤　切入点：温度　出处：《沈阳工业大学》2017年硕士论文

【摘要】：微波周围存在强电磁场,利用热电偶等传统温度传感器在微波场中进行温度测量时,由于传统温度传感器是由金属材料制成的,会对测量结果产生一定的影响。而光纤温度传感器传导的是光信号,能有效地避免电磁干扰,因此在微波场的温度测量中有很好的应用前景。通过查阅文献,在了解了光纤温度测量技术的基础上,以荧光光纤作为温度传感器,设计了荧光光纤温度测量系统,实现微波场中的温度测量。着手于提高测量系统的灵敏度、测温范围和精度,进行了一系列的理论分析和实验研究。设计了以C8051F060单片机为核心的荧光光纤温度测量系统,完成了系统硬件电路的搭建。对荧光材料的光谱特性进行了理论分析,利用光谱仪进行了荧光材料的光谱实验,从峰值波长和相对发光强度两个方面对选定的荧光材料的光谱进行了分析和比较。基于荧光寿命的测温原理,对光谱实验中相对发光强度较强的荧光材料进行了温敏特性实验,得到了荧光材料的温敏特性曲线,为温度测量系统温敏材料的选择提供理论依据,便于提高系统的灵敏度和测温范围。建立了最小二乘拟合法、FFT拟合法和积分面积比值法的数据处理模型,并对三种算法进行了理论上的推导,然后利用VC++6.0编写的上位机程序,对三种算法进行了仿真分析和比较,了解了三种数据处理算法的优劣,有利于提高系统的测温精度。
[Abstract]:There is a strong electromagnetic field around the microwave. When the traditional temperature sensor such as thermocouple is used to measure the temperature in the microwave field, because the traditional temperature sensor is made of metal material, The optical fiber temperature sensor can transmit light signal, which can effectively avoid electromagnetic interference, so it has a good application prospect in the temperature measurement of microwave field. Based on the understanding of optical fiber temperature measurement technology, using fluorescent fiber as temperature sensor, the temperature measurement system of fluorescent fiber is designed to realize temperature measurement in microwave field. A series of theoretical analysis and experimental research are carried out on the range and precision of temperature measurement. A temperature measurement system based on C8051F060 single chip computer is designed. The hardware circuit of the system is built. The spectral characteristics of the fluorescent material are analyzed theoretically, and the spectrum experiment of the fluorescent material is carried out by using the spectrometer. The spectrum of the selected fluorescent material was analyzed and compared from two aspects of peak wavelength and relative luminescence intensity. Based on the principle of temperature measurement of fluorescence lifetime, the temperature sensitive characteristic experiment of the fluorescent material with relatively strong luminescence intensity in the spectral experiment was carried out. The temperature sensitive characteristic curve of the fluorescent material is obtained, which provides a theoretical basis for the selection of the temperature sensitive material in the temperature measurement system. It is convenient to improve the sensitivity and temperature measurement range of the system. The data processing models of the least square fitting method and the integral area ratio method are established, and the three algorithms are deduced theoretically, and then the upper computer program written by VC 6.0 is used. The simulation analysis and comparison of the three algorithms are carried out, and the advantages and disadvantages of the three data processing algorithms are understood, which is helpful to improve the temperature measurement accuracy of the system.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN015

【参考文献】