一种新型的混合平面结构电导率传感器的设计与实现  

Design and Implementation of a New Conductivity Sensor Based on Mixed Planar Structure

作　　者：喻嵘[1] 王玉皞[1] 王晓磊[2] 周军乐[1] 王艳庆[1] YU Rong1, WANG Yuhao1 , WANG Xiaolei2, ZHOU Junle1, WANG Yanqing1(1. College of Information and Engineering Nanchang University,Nanchang 330000, China; 2. College of Information and Engineering Wuhan University, Wuhan 430000, Chin)

机构地区：[1]南昌大学信息工程学院,南昌330000 [2]武汉大学信息工程学院,武汉430000

出　　处：《传感技术学报》2017年第10期1614-1618,共5页Chinese Journal of Sensors and Actuators

基　　金：江西省对外合作项目(20141BDH80001);江西省教育厅科学技术研究项目(GJJ160079)

摘　　要：基于水体-电极系统的机理分析,设计并实现了一种新型的电导率传感器。传感器采用平面矩形线圈与叉指电极混合结构。通过搭建自动化实验平台,采用交流阻抗技术,对研制的传感器进行实测,以获得传感器在不同溶液、不同频率信号激励下的阻抗数据。经过与商用电导率传感器进行数据拟合,找出了阻抗数据与电导率之间的函数关系。实验证明,该电导率传感器是一种灵敏度高、稳定性强的测量工具,其测量精度达到了商用传感器标准,为水溶液电导率的测量提供了一个低成本的解决方案。A new conductivity sensor is designed and realized based on the detection mechanism analysis of electrode-water system. The structure of the planar electrodesensor combine the rectangular coils with interdigital electrodes.An automated test platform was built and AC impedance spectroscopy was adopted to obtain the impedance data of the sensor under the different test solutions and frequencies of excitation signal. Fitting with commercial conductivity sensor,the relationship of the detection impedance of planar electrode sensor and actual conductivity of testing sample was found out. The experimental results show the conductivity sensor is a measuring tool with high sensitivity and strong stability. It can be compared to commercial conductivity sensors and provide a low-cost solution for conductivity measurement of aqueous solutions.

关 键 词：电导率传感器 矩形线圈 叉指电极 交流阻抗技术 数据拟合 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]