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| 液体密度量传中大气压强影响的研究 | |
| 引用本文： | 张竟月,王金涛,时文才,刘翔,李占宏,佟林,马鑫钰. 液体密度量传中大气压强影响的研究[J]. 计量学报, 2018, 39(2): 192-196. DOI: 10.3969/j.issn.1000-1158.2018.02.11 |
| 作者姓名： | 张竟月 王金涛 时文才 刘翔 李占宏 佟林 马鑫钰 |
| 作者单位： | 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 |
| 基金项目： | 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100m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。 |
| 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 |
| 收稿时间： | 2017-10-27 |
Study on the Influence of Ambient Pressure on Liquid Density Transmission |
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| ZHANG Jing-yue,WANG Jin-tao,SHI Wen-cai,LIU Xiang,LI Zhan-hong,TONG Lin,MA Xin-yu. Study on the Influence of Ambient Pressure on Liquid Density Transmission[J]. Acta Metrologica Sinica, 2018, 39(2): 192-196. DOI: 10.3969/j.issn.1000-1158.2018.02.11 | |
| Authors: | ZHANG Jing-yue WANG Jin-tao SHI Wen-cai LIU Xiang LI Zhan-hong TONG Lin MA Xin-yu |
| Affiliation: | 1. National Institute of Metrology, Beijing 100029, China 2. China Jiliang University, Hangzhou, Zhejiang 310018, China |
| Abstract: | 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. |
| Keywords: | metrology liquid density standards compressibility vibrating-tube densimeter ambient pressure |
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