超低频电压量值溯源关键技术研究

石照民; 张江涛; 潘仙林; 宋莹

doi:10.12338/j.issn.2096-9015.2020.9011

超低频电压量值溯源关键技术研究

doi: 10.12338/j.issn.2096-9015.2020.9011

中国计量科学研究院，北京 100029

基金项目: 国家重点研发计划资助项目(2016YFF0201204)

详细信息

作者简介:
石照民（1991-），中国计量科学研究院助理研究员，研究方向：超低频电压量值溯源及传递装置建立，宽频电量精密测量方法研究，邮箱：shizhm@nim.ac.cn

通讯作者:
张江涛（1972-），中国计量科学研究院研究员，研究方向：交流电量国家基准及传递装置建立、维护及应用，邮箱：zhangjt@nim.ac.cn

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出版历程
- 网络出版日期: 2021-05-28
- 刊出日期: 2021-06-24

Research on Key Technologies of Ultra-Low Frequency Voltage Traceability

National Institute of Metrology, Beijing 100029, China

摘要

摘要: 针对热电变换器无法实现超低频电压交直流转换的问题，基于热电变换器输出热电势的平方特性和等幅值正交正弦信号平方和恒等特性，结合双加热丝热电变换器，提出一种超低频电压交直流转换方法，将超低频电压溯源至直流电压基准，实现10 Hz及以下超低频电压的量值溯源。搭建超低频电压交直流转换系统，在10 Hz频率下交直流转换的标准不确定度不超过14 µV/V。设计验证实验，与平面多元热电变换器交直流转换结果进行对比，两种方法得到的结果具有较好的一致性，其不一致性在不确定度范围内。
- 超低频电压 /
- 交直流转换 /
- 量值溯源 /
- 双加热丝热电变换器 /
- 旁证实验
Abstract: To address the problem that the thermal voltage converter (TVC) is unable to achieve the AC-DC conversion of ultra-low frequency voltages, an AC-DC transfer method is proposed with using dual-heater TVC based on the square characteristics of the output thermoelectric potential of the TVC and the square sum identity characteristics of two quadrature sinusoidal signals with identical amplitude. The ultra-low frequency voltage below 10 Hz is traced to the DC voltage standard. The ultra-low frequency voltage AC-DC transfer system is developed. The standard uncertainty of AC-DC transfer results at 10 Hz does not exceed 14 µV/V. A verification experiment is developed by comparing the AC-DC transfer results that from dual-heater TVC and planar multijunction thermal converter (PMJTC). The AC-DC transfer results obtained by the two different methods are consistent and the inconsistency is within the uncertainty range.
- ultra-low frequency voltage /
- AC-DC transfer /
- traceability /
- dual-heater thermal voltage converter /
- verification experiment

HTML全文

图 1 双加热丝热电变换器结构图

Figure 1. The structure of dual-heater TVC

下载: 全尺寸图片幻灯片

图 2 超低频电压交直流转换系统框图

Figure 2. The block diagram of AC-DC transfer system for ultra-low frequency voltage

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图 3 超低频电压交直流转换系统实物图

注：图中所示的仪器设备仅为该系统中实验设备，非推荐设备。

Figure 3. Picture of AC-DC transfer system for ultra-low frequency voltage

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图 4 交直流转换结果对比系统图

Figure 4. The comparison system diagram of AC-DC transfer results

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图 5 旁证实验流程图

Figure 5. The flow chart of verification experiment

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表 1 10 Hz低频电压交直流转换不确定

Table 1. Uncertainty evaluation results of AC-DC transfer for low frequency voltage at 10 Hz (µV/V)

u(δ_A) u(δ_Am) u(δ_P) u(δ_K) u(δ_R) u(δ_n) u

不确定度 8 5 5 4 4 6 14

下载: 导出CSV

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