摘要
精密离心机动态半径是影响其输出加速度精确度的主要因素。为获得精密离心机的动态半径变化规律及影响因素,基于外基准法采用高精度电容测微仪测试不同转速下的动态半径。基于转速不变时动态半径是直流分量的假定,对测试的数据进行分析,获得该离心机的动态半径随加速度变化规律为0.011 482μm.m^-1.s^-2和精密离心机转盘形状误差。分析数据可为精密离心机工作半径的修正及补偿提供依据。
The dynamic radius is one of the main factors contributing to the uncertainty of the precision centrifuge. To study the dynamic radius relation with the acceleration and the influence factors, a measurement system using capacitance detectors, which is mounted off-board, is utilized to measure the dynamic radius at different rotation speeds. Based on an assumption that dynamic radius is Direct Current(DC) component in measured data at a fixed rotation speed, the measured data is analyzed and a change rate of 0.011 482 μm/(m.s^-2) for dynamic radius with acceleration is obtained, as well as the turntable shape error. These results could help to modify and compensate the dynamic radius of the precision centrifuge.
作者
牛宝良
宁菲
NIU Baoliang;NING Fei(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621999,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2019年第5期892-897,共6页
Journal of Terahertz Science and Electronic Information Technology
基金
国家重大科学仪器专项基金资助项目(2011YQ130047)
关键词
精密离心机
动态半径
形状误差
precision centrifuge
dynamic radius
shape error
