【摘要】 碱金属混合物原子配比是超高灵敏惯性测量装置表头的重要参数,需精确测量。针对碱金属配比与碱金属蒸汽密度相关的特点,提出运用光深理论检测碱金属配比。结果表明:受多种因素影响,光深理论得到的碱金属蒸汽密度与饱和蒸汽压经验公式计算的结果相差3个数量级,无法保证碱金属配比的测量精度;改变数据处理方法,建立光谱吸收率与气室内部温度的映射模型,运用光谱吸收率标定碱金属气室内部温度,通过碱金属饱和蒸汽压经验公式计算气室内部碱金属原子的配比,多组数据分析表明:检测误差在10%以内。更多还原

【Abstract】 The ratio of alkali metal mixture is one of the most important parameters in gauge head belonging to the ultra-sensitivity inertial measurement equipment,which is required to detect precisely.According to the feature that ratio of alkali metal is related to alkali metal vapor density,the theory of optical depth is used to detect the ratio of alkali metal in the present article.The result shows that the data got by the theory of optical depth compared with empirical formula differs at three orders of magnitude,which can’t ensure the accuracy.By changing the data processing method,model between spectral absorption rate and temperature in cell is established.The temperature in alkali metal cell is calibrated by spectral absorption rate.The ratio of alkali metal atoms in the cell is analyzed by calculating the alkali density with empirical formula.The computational error is less than10%.更多还原