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亚毫开级NTC热敏电阻温度计研制及校准方法研究

SUN Jianping LI Ting WANG Guangyao DIAO Fuguang CHEN Lingling LI Jiahao LIU Zhibin

计量学报2025，Vol.46Issue(11)：1553-1560,8.

计量学报2025，Vol.46Issue(11)：1553-1560,8.DOI:10.3969/j.issn.1000-1158.2025.11.01

亚毫开级NTC热敏电阻温度计研制及校准方法研究

Research on the Development and Calibration Methods of Sub-milliKelvin NTC Thermistor Thermometers

SUN Jianping ¹LI Ting ¹WANG Guangyao ¹DIAO Fuguang ²CHEN Lingling ³LI Jiahao ⁴LIU Zhibin⁴

作者信息

1. National Institute of Metrology,Beijing 100029,China||The Technology Innovation Center of Metrology Technology of Infrared Remote Sensing,State Administration for Market Regulation,Beijing 100029,China
2. National Institute of Metrology,Beijing 100029,China
3. Chengdu Institute of Metrological Verification and Testing,Chengdu,Sichuan 610200,China
4. College of Mechanical and Transportation Engineering,University of Petroleum Beijing,Beijing 102249,China
折叠

摘要

Abstract

To break through the technical barriers of high-precision NTC thermistor thermometers,a high-stability NTC thermistor thermometer is developed,accompanied by research on its calibration methodology and stability evaluation techniques.By comparing the calibration deviations and analyzing propagation uncertainty across 4～7 calibration points,a five-point(0.01,15,29.764 6,45,and 60 ℃)calibration scheme combined with the Hoge-4 equation is proposed as the optimal method.A calibration uncertainty better than 0.8 mK(k=2)across the full temperature range of 0～60 ℃ is achieved,with a reduced uncertainty of no more than 0.6 mK(k=2)in the critical 22 ℃ region.Long-term stability of the self-developed NTC thermometer is tested by using fixed points and comparison methods,demonstrates that the stability of the sensor outperforms 0.4 mK.The self-heating effect is strongly correlated with excitation current and ambient temperature.To ensure sub-millikelvin temperature measurement accuracy,a working current of no more than 0.01 mA is recommended.This research provides key technical support for the engineering application and standard development of domestically produced high-precision NTC thermistor thermometers.

关键词

温度计量/负温度系数热敏电阻温度计/校准方程/自热效应

Key words

thermometer/negative temperature coefficient thermistors thermometer/calibration equation/self-heating effect

分类

通用工业技术

引用本文复制引用

SUN Jianping,LI Ting,WANG Guangyao,DIAO Fuguang,CHEN Lingling,LI Jiahao,LIU Zhibin..亚毫开级NTC热敏电阻温度计研制及校准方法研究[J].计量学报,2025,46(11):1553-1560,8.

基金项目

国家自然科学基金青年科学基金(52306121) （52306121）

中国计量科学研究院基本科研业务费(AKYZD2315) （AKYZD2315）

计量学报

OA北大核心

ISSN：1000-1158

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