基于微型镓基共晶固定点的温度传感器在轨校准方法研究

doi:10.3969/j.issn.1000-1158.2019.04.09

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Abstract A calibration method of the on-orbit temperature sensor based on the gallium - based alloy miniature fixed point is proposed. The developed process of the Gallium - based alloy miniature fixed points for on-orbit calibration and the quasi-adiabatic vacuum measurement system are introduced. Combined with cavity blackbody and non-proximal mounted temperature sensor, the repeatability of Ga-Sn and Ga-Zn alloy fixed points is measured,which was better than 2mK during melting process. For Ga, the long-term stability is 2.1mK. The temperature sensor at the bottom of cavity blackbody was indexed by the continuous melting plateau value measured by temperature sensor during gallium and two gallium-based alloy fixed points melting process in a specific thermal environment. The difference between the calibration result and the routine calibration method in the laboratory is less than 2mK. The results are also shown as the phase transformation time increases, the phase transition temperature is closer to the melting temperature of the phase change material, ie, the smaller the temperature difference between the fixed point and the temperature sensor hole, in the thermal environment conditions remaining unchanged. Meanwhile, for Ga-Sn and Ga-Zn, there is a linear relationship between the phase transition melting temperature and the single-point calibration temperature at zero power is 20.352°C and 25.187°C.

Key words： metrology gallium-based alloy miniature fixed point quasi adiabatic temperature sensor on-orbit calibration

Received: 12 March 2018 Published: 10 June 2019

PACS:

TB942

Corresponding Authors: Xiaopeng Hao E-mail: haoxp@nim.ac.cn

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	Articles by authors
	WEN Ping
	HAO Xiao-peng
	SUN Jian-ping
	YUAN Zun-dong
	DING Lei
	CHANG Jia-qiang

Cite this article:

WEN Ping,HAO Xiao-peng,SUN Jian-ping, et al. On - Orbit Calibration of Temperature Sensor based on Miniature Gallium - based alloy Fixed point[J]. Acta Metrologica Sinica, 2019, 40(4): 595-602.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.04.09 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I4/595

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