能量天平中砝码真空传递装置设计研究  

Design and research on weights vacuum transfer device for joule balance

作　　者：张邱 白洋[2] 曾涛 李正坤[2] 王健[2] Zhang Qiu;Bai Yang;Zeng Tao;Li Zhengkun;Wang Jian(School of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量大学机电工程学院,杭州310018 [2]中国计量科学研究院,北京100029

出　　处：《仪器仪表学报》2024年第8期185-192,共8页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划项目(2021YFF0603803,2023YFF0612501);国家自然科学基金项目(52175527);国家市场监督管理总局科技计划项目(2022MK176);中国计量科学研究院基本科研业务费项目(AKYRC2311,AKYZD2103)资助。

摘　　要：能量天平是我国自主研制的千克量子化复现装置,千克重新定义后如何实现基于能量天平的质量量值传递就显得尤为重要。然而,能量天平在质量量值传递过程中存在标准砝码暴露于空气环境中影响量值传递准确性的问题。为了解决该问题,基于能量天平结构特点,设计提出一种组合式砝码传递方案,并研制出对应的砝码真空传递装置,能够实现标准砝码在真空环境下从能量天平传递至真空容器,确保质量量值传递的准确性。然后,根据能量天平悬挂系统建立了传递装置传递准确性模型,并基于该模型得到了砝码传递x、y轴的传递误差分别为0.0116μm、0.0092μm,论证了砝码传递过程的准确性。最后通过实验验证了砝码真空传递装置给能量天平引入小于10-9量级的准直误差,不会影响能量天平精密准直状态。Joule balance is a self-developed device for quantized reproducing the kilogram in China.It is particularly important to achieve mass value transfer based on the joule balance after the kilogram is redefined.However,there is a problem with the accuracy of joule balance measurements due to the exposure of standard weights to the air environment during the transfer of mass values.To address this problem,based on the structural characteristics of the joule balance,a combined weight transfer scheme is designed and proposed,and a corresponding weight vacuum transfer device is developed,which can transfer standard weights from the joule balance to the vacuum container in a vacuum environment,ensuring the accuracy of mass value transfer.Then,based on the joule balance suspension system,a transfer accuracy model of the transfer device is formulated.Based on this model,the weight transfer x is obtained.The transmission errors of the y-axis are 0.0116μm and 0.0092μm,respectively,demonstrating the accuracy of the weight transmission process.Finally,it is verified through experiments that the weight vacuum transfer device could introduce an alignment error of no more than 10-9 orders of magnitude to the joule balance,and does not affect the precision alignment state of the joule balance.

关 键 词：能量天平 质量量值传递 标准砝码 真空容器 

分 类 号：TH715[机械工程—测试计量技术及仪器]