超低频交、直流比较仪的研究

Study on Very-Low Frequency AC/DC Comparator

本文提出了一种基于双加热丝热电转换器的超低频交、直流比较仪,以实现直流电压标准向超低频段的传递。比对测试结果表明:在0.01～20Hz 频率范围内,超低频交、直流比较仪与采样计算式超低频电压表的最大比对偏差为0.012%。

This paper presents a very-low frequency(AC/DC)comparatorbased on dual heater thermal converter to(transfer DC voltage standard toVLF voltage.Measurement results show that this comparative deviations bet-ween the comparator and the sampling-computation VLF voltmeter is within0.012% for frequency from 0.01 to 20 Hz.