An Induction Flowmeter Insensitive to Asymmetric Flow Profiles
An Induction Flowmeter Insensitive to Asymmetric Flow Profiles
复制标题
对不对称流量剖面不敏感的感应流量计
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
F. Mesch
中科院分区：
文献类型：
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作者：
B. Horner;F. Mesch
与大多数现有的流量测量方法一样，感应流量测量(IFM)的准确度受流量剖面形状的影响很大，因此流量计必须放置在离扭曲装置足够远的地方。在许多应用范围中，这是不受欢迎的、困难的，甚至是不可能的。本文提出了一种提高任意流型下感应流量计精度的新方法。精度增益是通过层析成像方法实现的，该方法使用的设置包括在垂直于流动方向的平面上旋转的磁场和多对电极。结果表明，随着电极数目的增加，由不对称轮廓引起的误差变得任意小。在四电极系统和非对称流型下的旋转磁场中进行了实验。实验结果表明，与传统的双电极交变磁场测量系统相比，测量精度有了很大的提高。
: As with most of the established flowmeasuring methods, the accuracy of induction flowmeasuring (IFM) is strongly influenced by the shape of the flow profile, so that the flowmeter must be placed sufficiently distant from distorting installations. In many ranges of application this is undesired, difficult or even impossible. In this paper, a novel method for improving the accuracy of induction flowmeters for arbitrary flow profiles is proposed. The accuracy gain is achieved by means of tomographic methods using a set-up consisting of a magnetic field rotating in a plane perpendicular to the flow direction and of multiple electrode pairs. It is shown that errors due to asymmetric profiles become arbitrarily small with growing number of electrodes. Experiments have been carried out with a four-electrode-system and a rotating field subject to asymmetric flow profiles. The experimental results showed a significant improvement in accuracy compared to a conventional two-electrode-system with alternating field.