【作者】 陈辉；

【导师】 尹成群； 何玉钧；

【作者基本信息】 华北电力大学（河北） ， 信号与信息处理， 2010， 硕士

【摘要】 本文通过分析半导体GaAs晶体的温度传感机理,设计了一种基于虚拟仪器技术的半导体吸收式光纤温度传感系统,采用Labview平台实现信号的实时检测与处理。通过对其工作原理和系统结构的分析,建立了完整的系统模型,并对模型进行了matlab仿真分析,得出各个元件对系统输出的影响规律和参数选取原则;设计GaAs探头的透射特性实验,验证了所设计的透射式探头结构的可行性;搭建了系统实验平台,并进行了实验分析。实验结果表明,系统在-10~100℃的温度范围内有±0.3℃的测量精度,并且具有较好的时间稳定性。更多还原

【Abstract】 By analyzing the temperature sensing mechanism of direct band-gap semiconductor material,an optical fiber temperature sensing system based on semiconductor absorption is designed, and the signal is detected and processed with LabVIEW—virtual instrument platform. Through analyzing its operating principles and system structure, the mathematical model of the system is established, and the law of used components on system output and the choice principle for each component are obtained by analyzing the system model with matlab. And the feasibility of sensing probe designed in this paper is verified by experiment for GaAs transitivity. Furthermore, experimental platforms are set up and experiments are carried out. The results show that the sensing system has high accuracy about 0.3 degrees between -10 and 150 degree and high reliability.更多还原