Phase detection for conductivity based on electromagnetic measurement system

2013 IEEE International Conference on Imaging Systems and Techniques (IST) Pub Date : 2013-10-01 DOI:10.1109/IST.2013.6729688

Yan Fu, F. Dong, C. Tan

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Abstract

In electromagnetic tomography, phase of measurements from receivers contain the significant information of conductivity for target to test. The quality of reconstruction image mainly depends on the precision of phase detection. To discuss the effects in this aspect, simulate the relative conditions by the finite element simulation software, COMSOL Multi-physics. Conduct simulations for the target in object field with different conductivity and simulate the conditions when the target place at different positions in object field. To verify the validity of the results from simulations, design a prototype EMT system. This system utilizes NI PXI-5105 board to collect the high frequency signal directly, which could guarantee the precision and simplify the complexity of hardware. Based on the prototype EMT system, use the salt solution with different conductivities as target and conduct a series of relevant experiments. Results from simulations and experiments show the same variation tendency for each condition. It makes foundation for the system developing and optimization in future.

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基于电磁测量系统的电导率相位检测

在电磁层析成像中，来自接收机的测量相位包含被测目标电导率的重要信息。重建图像的质量主要取决于相位检测的精度。为了讨论这方面的影响，利用有限元仿真软件COMSOL Multi-physics对相关条件进行了模拟。对目标在不同电导率的物场中进行仿真，模拟目标在物场中处于不同位置时的情况。为了验证仿真结果的有效性，设计了一个原型EMT系统。该系统采用NI PXI-5105板直接采集高频信号，保证了采集精度，简化了硬件复杂度。在原型EMT系统的基础上，以不同电导率的盐溶液为靶标，进行了一系列相关实验。模拟和实验结果表明，每种条件下的变化趋势相同。为今后系统的开发和优化奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2013 IEEE International Conference on Imaging Systems and Techniques (IST)

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