计量学报2024，Vol.45Issue(2)：150-156,7.DOI:10.3969/j.issn.1000-1158.2024.02.02
小型化气体声学温度计的研究
The Investigation of a Miniaturized Acoustic Gas Thermometer
摘要
Abstract
To promote the practical development of acoustic gas primary thermometry,a miniaturized acoustic gas thermometer with an inner diameter of 10 mm,an outer diameter of 12 mm and an inner length of 40 mm 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 782 K at atmospheric pressure.The results showed that the random deviation of the acoustic resonance frequency in atmospheric pressure air at 782 K is less than 0.2％using acoustic waveguides.After correcting the boundary layer and duct perturbations,the thermodynamic temperature of 407 K to 782 K with room temperature as the reference was obtained with an uncertainty of 0.76 K to 2.93 K(k=1).The investigation provided the possibility for application of the primary acoustic gas thermometer in harsh or special environment.关键词
温度计量/气体声学温度计/圆柱气体声学共鸣法/热力学温度/小型化Key words
temperature metrology/acoustic gas thermometer/cylindrical acoustic gas resonant method/thermodynamic temperature/miniaturization分类
通用工业技术引用本文复制引用
李明达,邢力,司明浩,冯晓娟,张金涛,王小杰..小型化气体声学温度计的研究[J].计量学报,2024,45(2):150-156,7.基金项目
国家重点研发计划(2021YFF0603703) （2021YFF0603703）
国家自然科学基金(52176170) （52176170）
