小型化气体声学温度计的研究

doi:10.3969/j.issn.1000-1158.2024.02.02

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Abstract To promote the practical development of acoustic gas primary thermometry, a miniaturized acoustic gas thermometer with an inner diameter of 10mm, an outer diameter of 12mm and an inner length of 40mm was developed based on the principle of measuring thermodynamic temperature by cylindrical acoustic gas resonant method. An optimized acoustic generator was used to improve the sound pressure intensity. The experiment was carried out from room temperature to 782K at atmospheric pressure. The results showed that the random deviation of the acoustic resonance frequency in atmospheric pressure air at 782K is less than 0.2% using acoustic waveguides. After correcting the boundary layer and duct perturbations, the thermodynamic temperature of 407K to 782K with room temperature as the reference was obtained with an uncertainty of 0.76K to 2.93K (k=1). The investigation provided the possibility for application of the primary acoustic gas thermometer in harsh or special environment.

Key words： temperature metrology;acoustic gas thermometer;cylindrical acoustic gas resonant method;thermodynamic temperature miniaturization

Received: 30 March 2023 Published: 21 February 2024

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TB942

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	Articles by authors
	LI Mingda
	XING Li
	SI Minghao
	FENG Xiaojuan
	ZHANG Jintao
	WANG Xiaojie

Cite this article:

LI Mingda,XING Li,SI Minghao, et al. The Investigation of a Miniaturized Acoustic Gas Thermometer[J]. Acta Metrologica Sinica, 2024, 45(2): 150-156.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.02.02 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I2/150

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