恒温式量热仪校准精密温度计的可行性研究  

Feasibility Study for Calibration of Precision Thermometers With Thermostatic Calorimeters

作　　者：李超 曾麟 陈岳飞 罗建明 LI Chao;ZENG Lin;CHEN Yuefei;LUO Jianming(Chenzhou Institute of Metrology Testing and Inspection,Chenzhou 423000,China;Hunan Institute of Metrology and Test,Changsha 410014,China)

机构地区：[1]郴州市计量测试检定所,郴州423000 [2]湖南省计量检测研究院,长沙410014

出　　处：《计量科学与技术》2022年第7期38-44,共7页Metrology Science and Technology

基　　金：国家重点研发计划(2018YFF01014005);湖南省市场监督管理局科技计划(2021KJJH57)。

摘　　要：随着测温精度高达1 mK甚至0.1 mK的精密温度计在实验设备和航空航天装备上的大量应用,对精密温度计量值溯源中使用的恒温槽的控温精度提出了更高要求,需要研究一种控温精度小于万分之一的恒温槽来满足其量值溯源需求。利用恒温式量热仪控温模式搭建检测精密温度计恒温槽的模型,通过理论分析和实验验证,该恒温槽模型可满足测温精度为1 mK甚至0.1 mK的精密温度计的校准要求。With the large-scale application of precision thermometers with a temperature measurement accuracy of up to1 mK or even 0.1 mK in experimental equipment and aerospace equipment, higher requirements are placed on the temperature control accuracy of the thermostatic bath used in the traceability of precision temperature measurement values.A thermostatic bath with a temperature control accuracy of less than 1/10,000 to meet the traceability requirements of its value. In this paper, the model of the thermostatic bath for testing precision thermometers is built by using the thermostatic calorimeter temperature control mode, and through theoretical analysis and experimental verification, the thermostatic bath model can meet the calibration requirements of precision thermometers with a temperature measurement accuracy of 1 mK or even 0.1 mK.

关 键 词：测温精度 温度波动 随机误差 置信区间 恒温槽 热容量 

分 类 号：TH811[机械工程—仪器科学与技术]