Finite-Element Simulation of Effect of Surface Roughness of Coaxial Cylindrical Electrodes on Small Mass and Force Measurements Using Voltage Balance Apparatus
Finite-Element Simulation of Effect of Surface Roughness of Coaxial Cylindrical Electrodes on Small Mass and Force Measurements Using Voltage Balance Apparatus
复制标题
同轴圆柱形电极表面粗糙度对使用电压平衡装置测量小质量和力的影响的有限元模拟
DOI：
10.1109/tim.2022.3165249
复制
发表时间：
2022
影响因子：
5.6
通讯作者：
Kuramoto Naoki
中科院分区：
文献类型：
--
作者：
Fujita Kazuaki;Kuramoto Naoki
日本国家计量研究所开发了一种利用同轴电极之间静电力的电压平衡装置，用于精确和可追溯地测量与千克新定义有关的小质量和力。为了使用电压平衡实现精确测量，通过测量它们的电容来机械地对准设备的同轴电极。在这项研究中，我们研究了同轴电极的表面粗糙度对电容梯度和质量测量的影响，在电压平衡测量中使用有限元法的2-D静电问题。结果表明，当电极的表面粗糙度小于几十微米的粗糙度高度的绝对值的平均值，他们没有显着增加的电容测量中的误差，由于机械变形。
A voltage balance apparatus that uses the electrostatic force between coaxial electrodes was developed at the National Metrology Institute of Japan for the accurate and traceable measurement of small masses and forces with respect to the new definition of the kilogram. To achieve accurate measurements using the voltage balance, the coaxial electrodes of the apparatus were mechanically aligned by measuring their capacitances. In this study, we investigated the effect of the surface roughness of coaxial electrodes on the capacitance gradient and mass measurements in voltage balance measurements using the finite-element method for 2-D electrostatic problems. The results suggest that when the surface roughness of the electrodes was less than a few tens of micrometers in the average value of the absolute values of roughness height, they did not significantly increase the errors in the capacitance measurements due to mechanical deformation.