基于热电偶的mK级精度测温系统

doi:10.3969/j.issn.1000-1158.2014.z1.037

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摘要对实现mK级测量精度的测温系统进行了研究,构建了基于标准铂电阻温度计作为冷端补偿的热电偶测温系统。对热电偶的测温过程进行分析,通过合理布置热电偶结点以及补偿扫描开关的短路电势,提高了测量的稳定性与重复性。与标准铂电阻温度计的对比实验表明,在实验室环境温度下,该测温系统实现了mK级的测温。

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	王皓
	高宏堂
	薛梓
	叶树亮

关键词 ：计量学, 热电偶, 多点测温

Abstract：A temperature measurement system which uses a standard platinum resistance thermometer to measure cold-junction temperature is developed to measure temperature with mK precision. By compensating the short-circuit potential of the scanning switch and placing the thermocouple junction properly, the stability and repeatability of the measurement system have been improved. Comparing with the standard platinum resistance thermometer at the same temperature, it is proved that this temperature measurement system can measure with mK precision in laboratory conditions.

Key words： Metrology Thermocouple Multi-point temperature measurement

基金资助:国家质检总局量值传递与质量安全项目(24-ALC1301-13)

作者简介: 王皓(1990-）,男,山东日照人,中国计量学院硕士研究生,主要从事线纹测量的研究。 myspace008@163.com

引用本文:

王皓,高宏堂,薛梓,叶树亮. 基于热电偶的mK级精度测温系统[J]. 计量学报, 2014, 35(z1): 158-163.
WANG Hao,GAO Hong-tang,XUE Zi,YE Shu-Liang. Temperature Measurement System Based on Thermocouple with mK Precision. Acta Metrologica Sinica, 2014, 35(z1): 158-163.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2014.z1.037 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2014/V35/Iz1/158