Code-Division-Multiplexing Using Orthogonal Codes for Fast Electrical Impedance Tomography

被引：0
|
作者：
Gevers, Martin [1 ]
Gebhardt, Patrik [1 ]
Vogt, Michael [2 ]
Musch, Thomas [1 ]
机构：
[1] Ruhr Univ Bochum, Inst Elect Circuit, D-44780 Bochum, Germany
[2] Ruhr Univ Bochum, High Frequency Engn Res Grp, D-44780 Bochum, Germany
来源：
2014 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE (I2MTC) PROCEEDINGS | 2014年
关键词：
D O I：
暂无
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Electrical impedance tomography (EIT) is used to determine the spatial conductivity distribution of a measurement environment, what involves several applications in the area of process engineering or medical science. In common systems a measurement environment is usually stimulated by defined current patterns in a serial time-multiplexing manner. Higher measurement rates can be achieved with code-multiplexed (CDM) excitations for parallel measurements. In order to optimize channel separation and dynamic range, orthogonal Walsh-Hadamard codes have been implemented on a fast EIT system. The crosstalk between different channels has been analyzed for 9 parallel coded excitation signals. Furthermore reconstructed conductivity distributions have been compared to reconstruction results obtained from frequency-multiplexed (FDM) measurements (root mean square difference of 0.02%).
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收藏
页码：1130 / 1133
页数：4
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