液体密度量传中大气压强影响的研究  

Study on the Influence of Ambient Pressure on Liquid Density Transmission

作　　者：张竟月 王金涛[1] 时文才[1] 刘翔[1] 李占宏[1] 佟林[1] 马鑫钰 

机构地区：[1]中国计量科学研究院,北京100029 [2]中国计量大学,浙江杭州310018

出　　处：《计量学报》2018年第2期192-196,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金(51475440)

摘　　要：为了探究并修正大气压强对液体密度的影响,提出了一种在低压条件下测量密度标准液体压缩系数的方法。通过纯水和空气标准密度的校准测量设备,建立压强和液体密度之间的关系。在不同温度点下对标准液体的压缩系数进行测量,得出每100 m的海拔差距引起的液体密度相对变化量大约为1×10^(-6),验证了密度修正的必要性。As an important part of density standards, liquid density standard plays a significant role in quantity transfer and traceability. In order to correct the influence of pressure, a method is proposed to measure the compressibilities of density standard liquids at low pressure. The relationship between the density of liquid and pressure is established by a calibration measuring which device of pure water and air standard density. Compressibilities of density standard liquids were measured by vibrating-tube densimeter calibrated. According to the result, the relative change is about 1×10^-6 in the density of the liquid caused by the elevation of 100 m, which verified the necessity of the correction.

关 键 词：计量学 液体密度基准 压缩系数 振动管密度计 大气压强 

分 类 号：TB933[一般工业技术—计量学]