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多激励频率模式的磁感应层析成像系统

王野 谭超 董峰

王野, 谭超, 董峰等 . 多激励频率模式的磁感应层析成像系统[J]. 北京航空航天大学学报, 2017, 43(11): 2331-2337. doi: 10.13700/j.bh.1001-5965.2017.0048
引用本文: 王野, 谭超, 董峰等 . 多激励频率模式的磁感应层析成像系统[J]. 北京航空航天大学学报, 2017, 43(11): 2331-2337. doi: 10.13700/j.bh.1001-5965.2017.0048
WANG Ye, TAN Chao, DONG Fenget al. Magnetic induction tomography system with multi-excitation frequency mode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2331-2337. doi: 10.13700/j.bh.1001-5965.2017.0048(in Chinese)
Citation: WANG Ye, TAN Chao, DONG Fenget al. Magnetic induction tomography system with multi-excitation frequency mode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2331-2337. doi: 10.13700/j.bh.1001-5965.2017.0048(in Chinese)

多激励频率模式的磁感应层析成像系统

doi: 10.13700/j.bh.1001-5965.2017.0048
基金项目: 

国家自然科学基金 61571321

国家自然科学基金 6151101270

天津市科技创新平台建设计划 16PTSYJC00060

详细信息
    作者简介:

    王野  男, 硕士研究生。主要研究方向:磁感应层析成像

    谭超  男, 博士, 副教授。主要研究方向:多相流过程参数检测、过程层析成像

    董峰  男, 博士, 教授。主要研究方向:多相流过程参数检测、过程层析成像

    通讯作者:

    谭超, E-mail: tanchao@tju.edu.cn

  • 中图分类号: TP212.3

Magnetic induction tomography system with multi-excitation frequency mode

Funds: 

National Natural Science Foundation of China 61571321

National Natural Science Foundation of China 6151101270

Science and Technology Innovation Plan of Tianjin 16PTSYJC00060

More Information
  • 摘要:

    磁感应层析成像(MIT)技术在生物医学检查与诊断中有很好的应用前景。为了实现MIT对生物组织特性信息的获取,设计了具有多激励频率模式的磁感应层析成像系统。系统采用电压激励与测量的工作模式,可选择100 kHz~4 MHz范围内的单频、扫频和混频3种激励频率模式。系统包括激励源模块、传感器线圈阵列、数据采集和调理模块、数字解调模块,采用现场可编程门阵列(FPGA)控制多路复用器、程控放大器、模拟数字转换器等。经模拟实验测试,多激励频率模式系统所获得的测试数据具有较好的一致性,信噪比在46 dB以上,不同激励频率下采集的电压差数据可用于实现被测介质电导率分布的图像重建。

     

  • 图 1  多激励频率模式MIT系统架构

    Figure 1.  Architecture of multi-excitation frequency mode MIT system

    图 2  信号激励模块流程图

    Figure 2.  Signal flow chart of excitation module

    图 3  传感器线圈几何尺寸

    Figure 3.  Geometric dimension of sensor coils

    图 4  数据采集和预处理模块流程图

    Figure 4.  Signal flow chart of detection and conditioning module

    图 5  多激励频率模式MIT系统

    Figure 5.  Multi-excitation frequency mode MIT system

    图 6  传感器线圈的结构和检测模型

    Figure 6.  Sensor coils' structure and detection model

    图 7  1 MHz和4MHz频率下的空场电压值

    Figure 7.  Empty field voltage values at frequency of 1 MHz and 4 MHz

    图 8  1 MHz和4 MHz频率下的有效信号

    Figure 8.  Effective signal at frequency of 1 MHz and 4 MHz

    图 9  图像重建结果

    Figure 9.  Image reconstruction results

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出版历程
  • 收稿日期:  2017-02-03
  • 录用日期:  2017-03-06
  • 刊出日期:  2017-11-20

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