一种实用化实时测温系统优化设计中的几个问题  

Several Problems about Optimization of a Practical Real-time Temperature Measurement System

作　　者：施德恒[1] 孙金锋[1] 刘玉芳[1] 朱遵略[1] 

机构地区：[1]河南师范大学物理系

出　　处：《光子学报》2005年第7期1103-1107,共5页Acta Photonica Sinica

基　　金：河南省科技攻关计划项目(编号:001120321);河南省自然科学基金项目(编号:0511014300)资助

摘　　要：基于Kirchoff定律,利用半导体激光器及钽酸锂热电器件设计了一种实用化的实时测温系统.根据待测目标的光谱辐出度及相对测温灵敏度随λT的变化关系,确定了系统工作波长的大致范围;通过对水冷遮蔽板的尺寸及其放置位置与波长间的关系、以及对大气的红外透射谱等的分析,确定了系统的工作波长;按照水冷遮蔽板的尺寸及其放置位置(H/R之值)对测温精度的影响,讨论了水冷遮蔽板的H/R之值,并由此分析了系统的抗干扰能力及测温精度.指出了引起系统测温不确定度的5种主要原因,并对其中的2种进行了简要的分析.实验结果表明,该系统的测温精度优于0.3%.Based on the Kirchhoff law, a practical temperature real-time measurement system using laser diode and LiTaO3 Pyroelectric detector is presented. According to the curves of spectral radiance and relative temperature measurement sensitivity versus λT, working wavelength range of the system is given. By means of analyzing the relationships between sizes of cooled shelter plate and positioning method and working wavelength, and atmospheric infrared transmission, working wavelength of the system is determined. According to the effect on temperature measurement accuracy by sizes of cooled shelter plate and positioning method, H/R values are discussed. And at the same time, anti-jamming ability and temperature measurement inaccuracy are also analyzed. Five main reasons resulted in temperature measurement uncertainty are presented. And the two are briefly discussed. Temperature measurement uncertainty exceeds 0.3%.

关 键 词：应用光学 温度测量 辐射测温 实时测量 半导体激光器 热释电探测器 

分 类 号：TN247[电子电信—物理电子学]