Dry calibration of electromagnetic flowmeters based on numerical models combining multiple physical phenomena (multiphysics)
Dry calibration of electromagnetic flowmeters based on numerical models combining multiple physical phenomena (multiphysics)
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DOI：
10.1063/1.3499643
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发表时间：
2010-10
影响因子：
3.2
通讯作者：
Xin Fu;Li Hu;K. Lee;J. Zou;X. Ruan;Huayong Yang
中科院分区：
文献类型：
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作者：
Xin Fu;Li Hu;K. Lee;J. Zou;X. Ruan;Huayong Yang
本文提出了一种电磁流量计的干法标定方法。该方法确定了导电液体流经磁场时在电动势中感应的电压，数值求解了流量计测量管内磁场、电场和流场的耦合多物理方程组和测量边界条件。具体地说，本文详细介绍了干法校准的公式和计算电动势灵敏度的有效算法(该算法自适应地最小化测量次数，并且只需要管道表面的磁通密度的法向分量作为边界条件来重建所涉及的磁场)。在深入讨论影响干式校准电动势最终精度的因素的基础上，通过在电动势的入口处安装挡板，实验研究了流动扰动对测量误差的影响。干法校准结果表明，该仪器具有较高的准确度。
This paper presents a method for dry calibration of an electromagnetic flowmeter (EMF). This method, which determines the voltage induced in the EMF as conductive liquid flows through a magnetic field, numerically solves a coupled set of multiphysical equations with measured boundary conditions for the magnetic, electric, and flow fields in the measuring pipe of the flowmeter. Specifically, this paper details the formulation of dry calibration and an efficient algorithm (that adaptively minimizes the number of measurements and requires only the normal component of the magnetic flux density as boundary conditions on the pipe surface to reconstruct the magnetic field involved) for computing the sensitivity of EMF. Along with an in-depth discussion on factors that could significantly affect the final precision of a dry calibrated EMF, the effects of flow disturbance on measuring errors have been experimentally studied by installing a baffle at the inflow port of the EMF. Results of the dry calibration on an ...