张可昊,
柯丽,,
王晨阳
沈阳工业大学电气工程学院 沈阳 110870
基金项目:国家自然科学基金(51377109)，辽宁省教育厅重点实验室基础研究项目(LZ2014011)
详细信息
作者简介:杜强：男，1975年生，博士，讲师，研究方向为生物阻抗检测、人体电信号检测与分析
张可昊：男，1993年生，硕士生，研究方向为医学电磁工程及医疗仪器
柯丽：女，1977年生，博士，教授，博士生导师，研究方向为生物阻抗成像、医学电磁工程
王晨阳：男，1995年生，硕士生，研究方向为生物医学电子与信息技术
通讯作者:柯丽 keli@sut.edu.cn
中图分类号:TM933计量
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被引次数:0
出版历程
收稿日期:2018-11-26
修回日期:2019-04-22
网络出版日期:2019-04-29
刊出日期:2019-09-10
Research on Synchronous Excitation and Detection Method for Synthetic Multi-frequency Magnetic Induction Signals
Qiang DU,Kehao ZHANG,
Li KE,,
Chenyang WANG
School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Funds:The National Natural Science Foundation of China (51377109), The Natural Science Foundation of Liaoning Province (LZ2014011)
摘要
摘要:磁感应检测技术是一种非接触、无创的电阻抗检测技术，多频率同步检测可同时获得不同频率下被测对象的阻抗信息。该文首先研究了磁感应信号多频率同步激励与检测原理，基于Walsh函数合成了5频率激励信号。其次分析了合成多频率同步检测性能，设计了合成多频磁感应信号同步检测系统。最后，通过合成5频率激励信号与同步检测系统进行不同电导率NaCl溶液的检测实验，结果表明：合成5频率激励信号5个主谐波的测量结果都具有很好的线性度，为磁感应信号多频率同步检测提供了激励-检测方法。
关键词:磁感应信号/
合成多频信号/
Walsh函数/
电导率测量
Abstract:Magnetic induction detection technology is a non-contact and non-invasive electrical impedance detection technology. Multi-frequency synchronous detection can simultaneously obtain the impedance information of the tested object at different frequencies. Firstly, the principle of multi-frequency synchronous excitation and detection of magnetic induction signal are studied. Five-frequency excitation signal is synthesized based on Walsh function. Secondly, the performance of synthesized multi-frequency synchronous detection is analyzed, and a synthesized multi-frequency magnetic induction signal synchronous detection system is designed. Finally, the detection experiments of NaCl solution with different conductivities are carried out by synthesizing five-frequency excitation signal and synchronous detection system. The results show that the measurement results of five main harmonics of synthesized five-frequency excitation signal have good linearity. It provides an excitation-detection method for multi-frequency synchronous detection of magnetic induction signal.
Key words:Magnetic induction signal/
Synthetic multi-frequency signal/
Walsh function/
Conductivity measurement
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