3-D flow tomography through electro magnetic induction
3-D flow tomography through electro magnetic induction
复制标题
通过电磁感应进行 3D 流动断层扫描
DOI：
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复制
发表时间：
2003
期刊：
影响因子：
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通讯作者：
Satoshi Honda
中科院分区：
文献类型：
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作者：
T. Katoh;Satoshi Honda
电磁流量计已成为工业上测量液体流量的标准仪器之一，应用于流体速度场的层析成像。当液体中的速度分布是轴对称的时，流量计具有与流量成正比的流量信号。尽管一些不均匀的磁场减弱了轴向非对称性的影响，但不存在使信号与流速成正比的理想磁场。相反，通过适当的磁场设计可以评估速度分布。本文提出了一种采用两组八个磁极和八个信号拾取电极的三维场激励的新设计。层流旋流条件下的模拟研究表明，可以从诱导信号中重建三维速度分布。
Electromagnetic flowmeters, which have been one of the standard instrument to measure liquid flow rate in industry, are applied to tomographic imaging of flow velocity field. A flow meter has a flow signal which is proportional to the flowrate when the velocity profiles in the liquid is axisymmetric. Although some non-uniform magnetic field reduces the effect of axial non-symmetricity, the ideal field which induces the signal proportional to the flow rate free from velocity profile does not exist. Conversely, it is possible to evaluate velocity profiles through the proper design of the magnetic field. In this paper, we propose a new design of the 3D field excitation with two sets of eight magnetic poles and of eight signal pick-up electrodes. From the simulation study under a laminar swirling flow, that the reconstruction of 3D velocity distribution can be achieved from the induced signals.