一种利用激光及热电器件的实时测温系统的测温精度  

Measuring Accuracy of a Practical Real-time Temperature Measurement System Using Lasers and Pyroelectric Detector

作　　者：施德恒[1] 陈玉科[2] 刘玉芳[3] 黄国庆[2] 

机构地区：[1]信阳师范学院物理系,河南信阳464000 [2]空军第一航空学院基础部,河南信阳464000 [3]河南师范大学物理系,河南新乡453002

出　　处：《计量学报》2004年第4期326-332,共7页Acta Metrologica Sinica

基　　金：河南省科技攻关计划项目(001120321)

摘　　要：基于Kirchhoff定律,利用半导体激光器及钽酸锂热释电探测器设计了一种实用化的实时测温系统。从反射辐射对该测温系统测温精度的影响出发,讨论了水冷遮蔽板的相对尺寸(即H R之值)与测温不确定度的关系,并确定了H R之值;从波长对该测温系统测温精度的影响出发,并结合系统的测温灵敏度、探测器的温度分辨率及大气的透射窗口和温度的标准差等的研究结果,确定了系统的工作波长;总结了影响该实时测温系统测温不确定度的5种原因,结合光路中的外界干扰对该测温系统测温精度的影响,对该测温系统的测温精度及系统的测温不确定度进行了简要的分析。实验表明,在400～1200℃测温范围内,系统的测温不确定度优于0 3%。Based on the Kirchhoff′s law, a practical temperature real-time measurement system using laser diode and LiTaO_3 pyroelectric detector is proposed. According to the effect on temperature measurement precision by reflection radiation, relative sizes (H/R values) of the water-cooled shelter plate are discussed, and the value of H/R is determined. In terms of the effect on temperature measurement precision by working wavelength of the system, the results of temperature measurement sensitivity, temperature resolving power of the detector, air transmission windows and standard deviation of temperature, working wavelength of the system is optimized. Five main factors affecting temperature measurement uncertainty are reviewed. Combining light interference with temperature measurement precision, temperature measurement precision and uncertainty are briefly analyzed. Experimental results show that the temperature measurement uncertainty is better than 0.3% at 400～1 200 ℃.

关 键 词：计量学 辐射测温 不确定度 半导体激光器 热释电探测器 

分 类 号：TB942[一般工业技术—计量学]