可溯源至国际温标的钢坯表面温度精确测量方法与仪器  

Accurate measurement method and instrument for surface temperature of steel billets traceable to international temperature scales

作　　者：王珺琳 张鸿宇 谢植[2] WANG Junlin;ZHANG Hongyu;XIE Zhi(School of Information Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;College of Information Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]沈阳理工大学信息科学与工程学院,辽宁沈阳110159 [2]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《冶金自动化》2024年第5期87-92,共6页Metallurgical Industry Automation

基　　金：辽宁省教育厅高等学校基本科研项目青年项目(1030040000668);沈阳理工大学引进高层次人才项目(1010147001228);流程工业综合自动化重点实验室高技术研发类项目(2018ZCX04)。

摘　　要：钢坯表面温度是钢铁生产中的重要检测参数,要求温度测量值准确且基准统一,然而测量结果不准确和无法溯源的问题始终没有根本解决。本文首先提出基于辐射切换的表面温度精确测量方法,通过运动管的位置转换得到固有辐射和多重反射辐射,结合双波长方法同时测量表面温度和发射率,消除发射率不确定的影响,并研制精确测温仪。针对温度量值无法溯源至国际温标的问题,分析辐射温度计在标定和测量中的矛盾条件,提出构建理想平面的方法,在测量平面上满足标定中的黑体条件和热平衡条件,使表面温度测量值能够追溯到实验室标准;搭建溯源平台并进行实验验证。实验结果表明,研制的精确测温仪在600~1000℃的平均测量误差为2.36℃,测量结果能够追溯至国际温标,溯源标准不确定度为0.75℃。Surface temperature of steel billets is an important parameter in steel production.The results are required accurate and can be traced to international temperature scales.However,the results are always inaccurate and untraceable.Firstly,an accurate method for surface temperature measurement based on changing radiation was proposed.The intrinsic radiation and multiple reflected radiation are obtained by converting the position of the tube.Using the dual-wavelength method to simultaneously measure surface temperature and emissivity,and the influence of uncertain emissivity is eliminated.A pyrometer is developed.For the issue of results that cannot be traced back to the international temperature scale,the contradictory conditions in calibration and measurement is analyzed.A method for constructing an ideal plane is proposed.The blackbody and thermal equilibrium conditions on the measured plane is met,so that the results can be traced to laboratory standards.Building a traceability platform and conduct experimental verification.Experimental results show that the average error of the pyrometer is 2.36℃at 600~1000℃,and the standard uncertainty is 0.75℃.

关 键 词：表面温度测量 溯源 发射率 理想平面 辐射切换 

分 类 号：TF701.3[冶金工程—钢铁冶金]