计量学报2024，Vol.45Issue(8)：1125-1131,7.DOI:10.3969/j.issn.1000-1158.2024.08.06
船载微型Ga-In共晶固定点的现场复现方法研究
Study on On-site Reproduction Method of Shipborne Miniature Ga-In Eutectic Fixed Point
摘要
Abstract
Application of fixed point thermometry technology to the field calibration of shipbrone sensors is a key strategy for achieving flattening in temperature measurements and enhancing the accuracy of oceanic temperature measurements.The fixed points defined by ITS90 in the temperature from-5 ℃ to 35 ℃ is inadequate,which blocks the accuracy improvement of the marine NTC thermistors.A new miniature Ga-In eutectic fixed point was developed,and the reproducibilities of the fixed point in temperature controlled box and ambient environment were investigated.Two methods including the tangent intersection method and cubic polynomial fitting were used to obtain the values of the temperature plateaus.The results showed that the reproducibility of the miniature Ga-In eutectic fixed point is better than 1 mK.In order to obtain better performance,the miniature Ga-In eutectic fixed point should be kept in solid state at temperature below its melting point.Using the tangent intersection method,the phase transition temperature of the miniature Ga-In eutectic fixed point is determined to be 15.654 9 ℃,with an expanded uncertainty of 1.54 mK(k=2).关键词
温度计量/微型共晶固定点/Ga-In二元合金/NTC热敏电阻/海洋温度传感器/现场校准Key words
temperature measurement/miniature eutectic fixed point/Ga-In binary alloy/NTC thermistor/ocean temperature sensor/on-site calibration分类
通用工业技术引用本文复制引用
朱幸福,潘江,王光耀,刁福广,孙建平,李婷,王彭宇..船载微型Ga-In共晶固定点的现场复现方法研究[J].计量学报,2024,45(8):1125-1131,7.基金项目
国家重点研发计划(2022YFC2204301-02 （）
2022YFF0607500/2022YFF0607501) （）
