A water content measurement method based on dielectric loss tangent tomography

A technology of dielectric loss angle and tomography, which is applied in the direction of material impedance, can solve the problems of being easily affected by flow patterns and inaccurate water content measurement, and achieve the effect of improving image reconstruction accuracy and calculation accuracy
CN110243870BActive Publication Date: 2022-03-11XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2022-03-11

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Abstract

A water content measurement method based on dielectric loss tangent tomography, step 1: Obtain the quadrature component and the in-phase component of the voltage response signal of the sensor array electrode through the impedance measurement circuit, and then obtain the loss reflecting the mixture in the area to be measured Angle tangent of displacement current phase value Step 2: Mathematical modeling of sensor parameters to obtain the initial sensitivity matrix S 0 ; Step 3: According to the obtained measured displacement current phase value and the initial sensitivity matrix S 0 , using the image reconstruction algorithm to obtain the real-time changing medium distribution image of the measured fluid; Step 4: Carry out image segmentation processing on the reconstructed image, effectively separate the target from the background, and then obtain the water content of the mixture; the present invention compares the existing The moisture content measurement technology has the following advantages: non-contact, fast response, wide application range, high safety and no radiation, simple equipment structure and not affected by flow patterns.
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Description

technical field

[0001] The invention relates to the technical field of multiphase flow parameter detection by electrical methods, in particular to a method for measuring water content based on dielectric loss tangent tomography technology. Background technique

[0002] The measurement accuracy of water cut meters for multiphase flow parameter measurement in the market today is generally not high, especially when the flow state of the fluid mixture is complex, the measurement accuracy is more difficult to guarantee. In order to eliminate the influence of flow pattern, process tomography (PT) has gradually developed into a new generation of real-time detection technology of spatial parameter distribution with two-phase flow or multiphase flow as the main detection object. Among them, Electrical Capacitance Tomography (ECT) is an electrical tomography technology based on the capacitance sensitive mechanism, because it has the advantages of non-contact, fast response, high safet...

Claims

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