Method and arrangement for the contactless inspection of moving electrically conductive substances

A non-contact, material technology, applied in the direction of measuring devices, volume/mass flow generated by electromagnetic effects, material analysis through electromagnetic means, etc., can solve the problems that the measurement sensitivity cannot be increased, the measurement sensitivity has decreased, and the flow velocity cannot be measured.
CN101512299AInactive Publication Date: 2009-08-19TECH UNIV ILMENAU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TECH UNIV ILMENAU
Publication Date
2009-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and arrangement for the contactless determination of conductivity-influencing properties and their spatial distribution over the entire cross section of an electrically conductive substance (O1) moving in a primary magnetic field (B). The substance (O1) may be a liquid or a solid. A simultaneous measurement of a number of mechanical state parameters of the magnetic system (03) is performed (three-dimensional components of the force and the torque), said parameters being variable by the effect of a secondary field on the magnetic system (03), the secondary field being produced on the basis of eddy currents induced in the substance (01) by the primary field (B). To determine the spatial distribution of the property that is sought, the primary field is changed in intensity or form a number times and a measurement of the state parameters is carried out for each change. The determination of the properties sought or their distribution takes place by solving an inverse problem using the method of least squares.
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Description

technical field

[0001] The invention relates to a method and a device for the contactless determination of properties of electrically conductive moving substances, which may be solid or liquid. In the preferred case of investigations of liquid substances, these substances are considered as moving substances while flowing through lines, channels or similar guidance aids. The invention also relates to a method and a device for the contactless determination of the spatial distribution of the properties of these substances, such as the flow velocity and the conductivity of the substances. The invention is particularly suitable for flow measurement and flow measurement in the field of metallurgy, and also for non-destructive material detection tasks. The device according to the invention is also referred to hereinafter as a Lorentz force flowmeter. Background technique

[0002] Precise measurement of flow velocity, flux and other properties (those affecting electrical conductiv...

Claims

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