基于ISO GUM法的温度巡检仪测量不确定度的研究  

Study on the Measurement Uncertainty of Temperature Itinerant Detecting Instruments Based on ISO GUM Method

作　　者：尹跃 梁兴忠 陈杰 马嫣 张虎 张炯 孔飞 YIN Yue;LIANG Xingzhong;CHEN Jie;MA Yan;ZHANG Hu;ZHANG Jiong;KONG Fei(Shandong Institute of Metrology,Jinan 250014,China;Jinan Institute of Measurement Testing,Jinan 250101,China;Jinan Changfeng Zhiyuan Instrument Technology Co.Ltd.,Jinan 250007,China)

机构地区：[1]山东省计量科学研究院,济南250014 [2]济南市计量检定测试院,济南250101 [3]济南长峰致远仪表科技有限公司,济南250007

出　　处：《计量科学与技术》2023年第1期60-67,共8页Metrology Science and Technology

基　　金：山东省质量技术监督管理局重点研发项目(2017KY01Z10)。

摘　　要：针对温度巡检仪计量检定的量值准确性问题,参考现有技术规范的测量模型,建立了温度巡检仪中低温传感器和高温传感器新的测量数学模型,采用GUM法对温度巡检仪进行了测量不确定度评定,为完善温度巡检仪量值溯源及传递体系提供了技术依据,也为温度巡检仪校准规范的修订提供必要技术支持。结果表明:基于GUM法的不确定度主要来源于温度巡检仪示值和恒温源的性能;中低温铂电阻传感器在-80℃~600℃范围内,测量不确定度为0.03℃~0.07℃(k=2);高温热电偶传感器在600℃~1 000℃范围内,测量不确定度为0.8℃(k=2)。选用盐浴恒温槽可以大大提高传感器在300℃~600℃温度段的校准水平。In order to address the issue of measurement accuracy in the calibration of temperature itinerant detecting instruments, a new mathematical model has been established for measuring the low-temperature Pt100 sensors and hightemperature thermocouple sensors based on existing technical specifications. The GUM method has been employed to assess the measurement uncertainty of the temperature itinerant detecting instruments, which provides technical support for improving the traceability and transfer system of these instruments and revising the calibration specification. The results show that the GUM method identifies the primary sources of uncertainty as the temperature itinerant detecting instruments’ indications and the performance of the constant temperature sources. The uncertainty of the low-temperature Pt100 sensors is 0.03℃ to 0.07℃(k=2) in the range of-80℃ to 600℃, while the uncertainty of the high-temperature thermocouple sensors is 0.8℃(k=2) in the range of 600℃ to 1000℃. Furthermore, the use of a salt bath tank can significantly improve the calibration accuracy of temperature sensors in the temperature range of 300℃ to 600℃.

关 键 词：计量学 温度巡检仪 GUM法 不确定度 

分 类 号：TH811[机械工程—仪器科学与技术]