量子电压基准在交流电检测中的应用

发布时间：2018-11-09 11:23

【摘要】：因交流电在电能应用中的广泛应用,高精度的交流电信号在科研实验和工业生产中的需求愈来愈高。同时,交流电压作为电学计量专业中的重要参数之一,交流电压的表征和高精度校准也成为了电学计量中的一项迫切任务。本文以基于超导约瑟夫森效应的任意波形合成技术为基础,探索并搭建一套交流电压校准系统。较于可编程约瑟夫森电压基准,脉冲驱动的任意波形合成技术合成波形具有信号频率高、幅度可计算和更低不确定度等优点。论文首先设计传统高精度DAC的任意波形发生器,使其生成频率高,幅度可精确计算的波形信号,并分析传统逐步逼近型正弦波波形特性。其次,通过阻抗匹配将通过脉冲驱动的任意波形合成技术合成的单频正弦波与传统高精度DAC生成正弦波进行采样分析,初步分析两者的频域特性。最后,通过对两者合成波形采样数据分析,得出交流电信号相关参数的分析对比。
[Abstract]:Because of the wide application of AC in electric energy, the demand of high precision AC electrical signal in scientific research, experiment and industrial production is more and more high. At the same time, as one of the important parameters in electrical measurement, the representation and high precision calibration of AC voltage has become an urgent task in electrical measurement. Based on the technique of arbitrary waveform synthesis based on superconducting Josephson effect, a set of AC voltage calibration system is explored and built in this paper. Compared with programmable Josephson voltage reference, pulse driven arbitrary waveform synthesis technique has the advantages of high signal frequency, computable amplitude and lower uncertainty. Firstly, the arbitrary waveform generator of traditional high-precision DAC is designed to generate waveform signals with high frequency and accurate amplitude, and the characteristics of traditional sinusoidal waveform are analyzed. Secondly, the single-frequency sinusoidal wave synthesized by the pulse-driven arbitrary waveform synthesis technique and the traditional high-precision DAC generated sinusoidal wave are sampled and analyzed by impedance matching, and their frequency domain characteristics are preliminarily analyzed. Finally, by analyzing the sample data of the two synthetic waveforms, the relative parameters of AC electrical signals are analyzed and compared.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB971

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