极端快速条件下液体电导率实时测量技术  

Real-time measurement of liquid conductivity under extreme fast conditions

作　　者：黄钰 孙燕云[1] HUANG Yu;SUN Yanyun(School of Physical Sciences&Technology,Southwest Jiaotong Univesity,Chengdu 610031,China)

机构地区：[1]西南交通大学物理科学与技术学院,成都610031

出　　处：《电子测试》2024年第1期53-57,共5页Electronic Test

摘　　要：基于对称差分原理,发展了一套用于极端快速条件下液体介质电导率的实时原位测量技术,主要解决了传统测量方法在极端快速条件下测量液体电导率时液体介质易电解,以及快速冲击过程中液体介质的冲击极化对电压信号测量带来困难等问题。该实时测量技术在样品测试过程中两端电压不超过电极电势,且测量时间仅为数微秒,从而保证了液体介质不受强电场影响发生电解,通过对样品中两电极分别测量的电压信号进行差分,有效消除由液体介质受到快速冲击时产生的极化干扰,从而提升在极端快速条件下的测量精度和可靠性。以对去离子水进行快速冲击测试实验为例,结果显示该测量技术能在纳秒时间尺度内准确反映导电性变化历史,展现出广泛的科研和工程应用潜力。A set of real-time in-situ measurement techniques for the conductivity of liquid media under extreme fast conditions is developed based on the symmetric difference principle,which mainly solves the problems of electrolysis of liquid media when measuring the conductivity of liquids under extreme fast conditions by the traditional measurement method and the difficulty of measuring the voltage signal by the impact polarization of the liquid media in the process of rapid impact.The real-time measurement technology in the sample testing process,the voltage at both ends does not exceed the electrode potential,and the measurement time is only a few microseconds,thus ensuring that the liquid medium is not affected by the strong electric field electrolysis,and through the two electrodes in the sample were measured by the difference of voltage signals,effectively eliminating the liquid medium by the rapid impact of the polarization of the interference,thereby improving the accuracy and reliability of the measurements in the extreme fast conditions.In this study,the voltage signals of the two electrodes in the sample were differentiated.The rapid impact test experiment on deionized water is taken as an example,and the results show that this measurement technique can accurately reflect the conductivity change history in the nanosecond time scale,which demonstrates a wide range of potential for scientific research and engineering applications.

关 键 词：对称差分电路 快速加载 电导率 液体 实时测量 

分 类 号：TM930.1[电气工程—电力电子与电力传动]