砝码质量测量中的空气密度测量装置的研究  

Study on Air Density Measurement for Measuring Weights

作　　者：王肖磊[1] 王健[1] 钟瑞麟[1] 张跃[1] 蔡常青[1] 姚弘[1] 丁京安[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《计量学报》2011年第1期40-43,共4页Acta Metrologica Sinica

摘　　要：按照砝码质量测量时对空气密度测量的需求，分析TN量空气密度的公式法，研制了用于高准确度砝码质量测量的空气密度测量装置。根据CIPM-2007公式，该装置集成了温湿度、压力和CO2含量的测量，实现了对空气密度的自动实时测量。实验结果表明，当CO2含量达到937．4×10^-6时，与采用近似公式进行测量的数据的相对误差达到0．022％，验证了增加C02含量测量对提高空气密度测量准确度的必要性。To determine air density for high accuracy measurement of the weights, the method using the recommended equation is studied. According to the CIPM - 2007 equation, an equipment of air density measurement that for high accuracy measurement of the weights is developed. Measurement of temperature, humidity, pressure and COz are integrated on it to measure air density automatically. Comparing with the results using approximation formula for air density, the relative error of 0.022% is achieved when CO2 is 937.4 ×10^ -6. The experimental results prove that additional measurement of CO2 can improve accuracy of air density measurement.

关 键 词：计量学 空气密度 质量 砝码 空气浮力修正 CIPM-2007公式 

分 类 号：TB92[一般工业技术—计量学]