A Coil-Coupled Sensor for Electrolyte Solution Conductivity Measurement

被引：0

作者：

Yang, Bin ^{[1
]}

Meng, Fan ^{[1
]}

Dong, Yonggui ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Precis Instrument, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China

来源：

PROCEEDINGS OF 2013 2ND INTERNATIONAL CONFERENCE ON MEASUREMENT, INFORMATION AND CONTROL (ICMIC 2013), VOLS 1 & 2 | 2013年

关键词：

inductive coupling; coil coupling; electrolyte solution; conductivity; passive sensor;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A coil-coupled sensing system for measuring electrolyte solution concentration is proposed by means of testing resistance between two immersed electrodes. The sensing electrodes, together with resistor and capacitance elements, are connected with a coil to construct a passive sensor. The coil is coupled with the readout coil and the equivalent impedance is analyzed. The results show that, for cases of different coilcoupling positions, lumped parameter values of inductance and resistance at the same angular frequency can be connected by a straight line in complex impedance plane. The slope constant of the straight line, which encompasses a linear relationship with resistance in the passive sensor, is not sensitive to the relative position between the two coupled coils. When the slope constant is selected as measured parameter, the electrolyte solution concentration can be readout without critically aligning the coupled coils positions.

引用

页码：57 / 60

页数：4

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