宽量程电桥比较器，用于音频和低频的精确阻抗测量

29th Conference on Precision Electromagnetic Measurements (CPEM 2014) Pub Date : 2014-10-02 DOI:10.1109/CPEM.2014.6898272

M. Surdu, D. Surdu

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引用次数: 4

摘要

描述了精确的(不确定度-优于1ppm，灵敏度-优于主量程0.1 ppm)桥式比较器，仅通过相位控制进行平衡。桥旨在测量宽动态范围(从10-7到1017欧姆)的任何阻抗。它工作在宽频率范围(从10-2到10千赫)。桥梁平衡和不确定度校正使用变分方法和测量不平衡信号。桥式比较任意相角的阻抗，即C↔C, R↔R, L↔L, C↔L, C↔R, R↔L。

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Wide range bridge-comparator for accurate impedance measurements on audio- and low frequencies

The accurate (uncertainty - better than 1 ppm, sensitivity - better than 0.1 ppm on main ranges) bridge- comparator, balanced by phase control only, is described. Bridge is aimed to measure any impedance in wide dynamic range (from 10^-7 to 10¹⁷ Ohm). It operates in wide frequency range (from 10^-2 to 10 kHz). Bridge balancing and uncertainty correction use the variational method and measurements of unbalance signals. Bridge compares the impedances with arbitrary phase angle, i.e. C ↔ C, R ↔ R, L ↔ L, C ↔ L, C ↔ R, R↔ L.

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29th Conference on Precision Electromagnetic Measurements (CPEM 2014)

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