热老化试验箱换气率不确定度评定  

Evaluation of uncertainty in air change rate of thermal aging test chamber

作　　者：刘虎生 王洪冬 孙晨[1] LIU Husheng;WANG Hongdong;SUN Chen(Jiangsu Institute of Metrology,Nanjing 210023,China)

机构地区：[1]江苏省计量科学研究院,江苏南京210023

出　　处：《工业计量》2024年第4期111-113,共3页Industrial Metrology

基　　金：江苏省市场监督管理局科技项目(KJ2023019)。

摘　　要：热老化试验箱的换气率是保障其实验性能的重要参数,换气率参数的校准涉及到温度、电功率、空气密度、工作容积等多个参数,因此评定其测量不确定度过程较为复杂。文章依据JB/T 7444—2018《空气热老化试验箱》中的热老化试验箱换气率校准方法,采用将其测量模型转换成积商形式的方式,对热老化试验箱换气率参数的测量结果不确定度进行评定,简化了评定过程中各分量灵敏系数的计算,以供计量校准人员参考借鉴。The air change rate of the thermal aging test chamber is an important parameter in ensuring its'experimental performance.The calibration of the air change rate parameter involves many parameters,such as temperature,electric power,density of air,and working volume.Therefore,the process of evaluating its measurement uncertainty is quite complex.This paper mainly uses the air change rate calibration method of the thermal aging test chamber in JB/T 7444—2018"Air Thermal Aging Test Chamber"to convert its measurement model into a product and quotient form,and greatly simplifies the calculation of the sensitivity coefficients of each component in the evaluation process,providing reference for metrological calibration personnel.

关 键 词：热老化试验箱 换气率 不确定度评定 

分 类 号：TM21[一般工业技术—材料科学与工程]