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Water content measuring method based on dielectric loss angle tangent tomography technology

A technology of dielectric loss angle and tomography, applied in material impedance and other directions, can solve problems such as being easily affected by flow pattern and inaccurate water content measurement, so as to improve image reconstruction accuracy, compensate for image reconstruction distortion, and improve calculation The effect of precision

Active Publication Date: 2019-09-17
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

[0004] In order to solve the problem that the traditional moisture content measurement is inaccurate and easily affected by the flow pattern, the purpose of the present invention is to provide a moisture content measurement method based on dielectric loss tangent tomography technology, which uses non-contact array electrode tomography Imaging technology enables water cut measurement without disturbing the flow field and flow pattern, and adopts sensitivity adaptive adjustment and image segmentation module to improve the quality of image reconstruction and further improve the accuracy of water cut measurement

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  • Water content measuring method based on dielectric loss angle tangent tomography technology
  • Water content measuring method based on dielectric loss angle tangent tomography technology
  • Water content measuring method based on dielectric loss angle tangent tomography technology

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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...

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Abstract

The invention discloses a water content measuring method based on a dielectric loss angle tangent tomography technology. The method comprises the following steps: 1, acquiring an orthogonal component and an in-phase component of a voltage response signal of a sensor array electrode through an impedance measurement circuit, and further obtaining a displacement current phase value which reflects the loss angle tangent of a mixture in a to-be-measured area; 2, performing mathematical modeling on sensor parameters, and obtaining an initial sensitivity matrix S0; 3, according to the obtained displacement current phase value and the initial sensitivity matrix S0, and by utilizing an image reconstruction algorithm, obtaining a dielectric distribution image of a measured fluid which changes in real time; and 4, performing image segmentation processing on a reconstructed image to effectively separate a target from a background so as to obtain the water content of the mixture. Compared with an existing water content measuring technology, the method has the advantages of non-contact, high response speed, wide application range, high safety, no radiation, simple equipment structure and no flow pattern influence.

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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 王小鑫陈延军李燕李利品陈阳正
Owner XI'AN PETROLEUM UNIVERSITY
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