针对立式计算电容最大不确定度来源的端部效应误差,中国计量科学研究院经过多年改进,研制出的最优中空电补偿电极在计算电容模型装置上,没有采用加装钉子头进行补偿的电补偿方案,并完成了诸如端部效应误差的补偿效果、偏心效应误差等电气性能验证试验,成功应用在新一代立式计算电容装置上。实验结果表明,采用电补偿方案的新一代立式计算电容装置复现1 pF电容单位的相对标准不确定度为1.0×10-8。
Abstract
To compensate the end effect error in a vertical calculable cross-capacitor (VCCC) with a fixed and a movable guard electrode, an electrical compensation approach is adopted by the National Institute of Metrology, China (NIM). After continuous improvements and modifications, the latest optimal hollow active auxiliary electrode (OHAAE) was developed, which was different from a nosepiece used by other national institutes of metrology in the world, and its electrical performances including the compensation effectiveness, eccentricity effect and so on were investigated on the NIMs model capacitor device.Instead of the nosepiece, the latest OHAAE was successfully applied and the relative standard uncertainty of the reproduction of 1 pF capacitance unit from the new NIMs VCCC was 1.0×10-8.
关键词
计量学 /
立式计算电容 /
电补偿方案 /
中空电补偿电极
Key words
metrology /
vertical calculable cross-capacitor /
electrical compensation approach /
hollow active auxiliary eletrode
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参考文献
［1］Thompson A M, Lampard D G. A new theorem in electrostatics and its application to calculable standards of capacitance［J］. Nature, 1956, 177(4515): 888.
［2］周琨荔,屈继峰,张钟华,等. 交流量子电压标准研究综述［J］. 计量学报, 2017, 38(4): 486-491.
Zhou K L,Qu J F,Zhang Z H, et al . The Status of AC Quantum Voltage Standards［J］. Acta Metrologica Sinica, 2017, 38(4): 486-491.
［3］Clothier W K. A calculable standard of capacitance［J］. Metrologia, 1965, 1(2): 36-55.
［4］Jeffery A, Lee L H, Shields J Q. Model tests to investigate the effects of geometrical imperfections on the NIST calculable capacitor［J］. IEEE Trans Instrum Meas, 1999, 48(2):356–359.
［5］Small G W, Fiander J R. Design of a calculable cross-capacitor［C］// 2004 Conference on Precision Electrom-agnetic Measurements Digest. London, UK, 2004.
［6］Lu Z L, Huang L, Yang Y, et al. An initial reproduction of SI capacitance unit from a new calculable capacitor at NIM［J］. IEEE Trans Instrum Meas, 2015, 64(6): 1496-1502.
［7］张钟华,陆祖良.降低可动屏蔽型计算电容端部效应误差的一个新方法［J］.计量学报,1982, 3(4):250-258.
Zhang Z H, Lu Z L. A new method for reducing the end-effect error of the cross-capacitor with a movable guard rod［J］. Acta Metrologica Sinica, 1982, 3(4): 250-258.
［8］Huang L, Small G W, Lu Z L, et al. Model tests of electrical compensation method for the new calculable cross-capacitor at NIM［J］. IEEE Trans Instrum Meas, 2013, 62(6): 1789-1794.
［9］Huang L, Lu Z L, Yang Y, et al. A novel hollow active auxiliary electrode applied for the vertical calculable cross-capacitor at NIM［J］. IEEE Trans Instrum Meas, 2015, 64(6): 1657-1662.
［10］Huang L, Lu Z L, Yang Y, et al.The optimal hollow active auxiliary electrode and its additional functions research［C］// Proc CPEM Dig. Ottawa, Canada, 2016.
［11］Huang L, Yang Y, Lu Z L, J et al. Practical application of latest optimal hollow active auxiliary electrode in vertical calculable cross-capacitor at NIM［J］. IEEE Trans Instrum Meas, 2019, 68(6): 2144-2150.
［12］陆祖良, 黄璐, 杨雁, 等. 可动屏蔽型计算电容复现电容单位的方法研究［J］. 计量学报, 2014, 35(6): 521-527.
Lu Z L, Huang L, Yang Y, et al. Research for Reproducing SI Unit of Capacitance by the CaIcuIabIe Capacitor with a MovabIe Guard Rod［J］. Acta Metrologica Sinica, 2014, 35(6): 521-527.
［13］Wang J B, Qian J, Liu Z Y, et al. Displacement determination of the guard electrode for the new calculable capacitor at NIM［J］. IEEE Trans Instrum Meas, 2016, 65(11): 2569-2577.
基金
国家重点研发计划(2016YFF0200105);国家自然科学基金(51877202)
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