正弦波电压差分测量与多周期策略——阶梯波研究之三

将片段采样概念应用于正弦波电压的差分测量,把多周期策略施加于被测正弦波的频率扩展,通过实验演示上述测量的具体过程,验证方法的可行性。分析了阶梯波差分测量的特点。为适应这个特点,提出了限幅片段采样的概念及相应的方法。由此提出将交流量子电压基准的准确度提高一个数量级至10^-8水平的建议,叙述了它的原理及具体的方法,指出了所需要的条件。

Differential Measurement of Sine Wave Voltage and Multi-period Strategy

The concept of piecewise sampling is applied to differential measurement of sine wave voltage. The multi-period strategy is adopted for frequency expansion of sinusoidal voltage under measurement. The experiments demonstrate practical process of these measurements and verify feasibility of the proposed approaches. The characteristic of differential measurement based on staircase waveform is analyzed. For meeting this characteristic a novel concept termed as “limiting amplitude piecewise sampling” is proposed, and the corresponding approach is presented. Based on this approach a suggestion is consequently provided to improve accuracy of the AC quantum voltage standard from level of 10-7 to 10-8. Its principle and detailed method are presented and the necessary conditions are mentioned.