前置反射器比色高温计的研究  

Development of a Two-Color Pyrometer with a Reflector Placed Ahead

作　　者：车勋建 谢植[1] CHE Xun-jian;XIE Zhi(School of Information Science ＆ Engineering,Northeastern University,Shenyang 110819, China)

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2018年第2期162-165,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(61273178)

摘　　要：研究了一种改进的比色高温计测量表面温度,测量范围为600~1 200℃.将半球型镀金反射器置于比色高温计上,利用多次反射效应,可缩小两个接收波长的有效发射率之间的差异,从而减小比色高温计误差.研究了反射器对焦情况下的辐射特性,推导出有效发射率的表达式.为避免反射器对被测面温度场的破坏,设计了一套快速测量装置,每次测量需时0.7 s.为验证其准确性,制作了平片热电偶,直接测量平片热电偶的表面温度.结果显示,与平片热电偶相比,测量误差小于1.1℃.An improved two-color pyrometer for measuring surface temperature ranging from600 ℃ to 1 200 ℃ is developed. A gold-plated semispherical reflector is placed ahead of a twocolor pyrometer. When the reflector is positioned facing the measured target,the received radiance energies are increased,and the disparity between the effective emissivities of the two received wavelengths is decreased. As a result,the measurement error of the two-color pyrometer is reduced,compared with the one without a reflector. The expression of effective emissivity for the focused reflector is deduced. A fast measurement apparatus is developed,which spends 0. 7 s on one time of measurement,in order to prevent temperature disturbance. A plain-type thermocouple is made,and the proposed pyrometer measures the surface temperature of the thermocouple for validation. The measurement error is within 1. 1 ℃.

关 键 词：反射器 比色高温计 表面温度 温度测量 发射率 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]