大口径高发射率水热管标准黑体辐射源  

Large aperture high-emissivity water heatpipe standard blackbody radiation source

作　　者：王景辉[1,2] 原遵东[2] 段远源[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室二氧化碳资源化利用与减排技术北京市重点实验室,北京100084 [2]中国计量科学研究院热工所,北京100029

出　　处：《仪器仪表学报》2015年第4期841-847,共7页Chinese Journal of Scientific Instrument

基　　金：国家质检公益行业科研专项(200910106)项目资助

摘　　要：为满足国内黑体辐射源亮度温度的溯源需求,中国计量科学研究院研制了50~270℃大口径高发射率水热管标准黑体辐射源。本文介绍了水热管黑体辐射源的研制、性能测试和不确定度。利用Monte Carlo方法研究了圆柱形空腔内壁V槽角度对空腔法向有效发射率的影响。设计了圆柱形空腔,内壁加工31°角的1 mm深V形槽,喷涂高发射率Pyromark 1200黑漆,空腔开口74 mm,腔深520 mm,法向有效发射率优于0.999 8,实现了黑体源空腔在大口径条件下的高发射率。设计了基于PID控制的黑体辐射源温度控制系统和高精度的黑体辐射源空腔温度测量系统。水热管黑体辐射源的温度稳定性为0.04℃/20 min,空腔底部有效亮度温度均匀性为0.08℃,有效亮度温度扩展不确定度为0.036~0.104℃。建立了基于变温黑体辐射源的国家亮度温度标准。In order to meet the requirement of radiance temperature traceability of blackbody radiation source in China, a large aperture high-emissivity water heatpipe standard blackbody radiation source was developed in National Institute of Metrology （NIM）. The devel- opment, characteristic test and radiance temperature uncertainty of the water heatpipe blackbody radiation source are presented in this paper. The effect of the V groove angle on the cylindrical cavity inner wall on the cavity normal effective emissivity was studied with Monte Carlo method. The cylindrical cavity with 1 mm deep and 31 ~ angle V groove was designed. The cavity is 74 mm in diameter and 520 mm in depth; and the cavity is painted with Pyromark 1200 coating. The calculated normal effective emissivity of the cavity is better than 0. 999 8. The PID controlled blackbody radiation source temperature control system and high precision blackbody radiation source cavity temperature measurement system were designed. The temperature stability of the water heatpipe blackbody radiation source is 0.04 ℃ within 20 min and the effective temperature uniformity at the cavity bottom is 0.08 ℃. The extended uncertainty of effective ra- diance temperature of the high-emissivity water heatpipe blackbody radiation source is estimated as 0.036 - 0. 104 ℃. The high-emissiv- ity water heatpipe blackbody radiation source is used to establish the blackbody radiation source based national radiance temperature scale.

关 键 词：黑体辐射源 水热管 辐射测温 

分 类 号：O551.2[理学—热学与物质分子运动论] TB942[理学—物理]