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Image reconstruction method for detecting two-phase flow in pipeline

A technology for image reconstruction and detection of pipelines, which is applied to measurement devices, instruments, and material analysis by electromagnetic means. The effect of quality improvement

Pending Publication Date: 2022-03-11
HENAN NORMAL UNIV
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Problems solved by technology

Because of the complexity of two-phase flow, it is very difficult to measure it

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  • Image reconstruction method for detecting two-phase flow in pipeline
  • Image reconstruction method for detecting two-phase flow in pipeline
  • Image reconstruction method for detecting two-phase flow in pipeline

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Embodiment Construction

[0017] The image reconstruction method for detecting two-phase flow in pipelines of the present invention is described in detail with reference to the accompanying drawings.

[0018] The image reconstruction method for detecting the two-phase flow in the pipeline of the present invention aims at the problem of poor real-time performance and unclear background when reconstructing the pipeline fluid image. The regularization parameter is selected through an adaptive method to weigh the weight between the least squares term and the regularization term.

[0019] Such as figure 1 Shown is a flow chart of the image reconstruction method for detecting two-phase flow in pipelines of the present invention.

[0020] Such as figure 2 As shown, it is a schematic diagram of the capacitance-coupled resistance tomography system of the present invention, and a typical CCERT measurement system is mainly composed of a sensor electrode array, a data acquisition and processing unit, and an ima...

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Abstract

The invention discloses an image reconstruction method for detecting two-phase flow in a pipeline. The image reconstruction method specifically comprises the following steps: (1) constructing a capacitance coupling resistance tomography sensor model; (2) calculating a Jacobian matrix S according to the obtained boundary measurement data; (3) proposing a target function of the image reconstruction method for detecting the two-phase flow in the pipeline; (4) introducing an auxiliary variable z, converting an unconstrained problem of the optimization model into a constrained problem, and writing a minimum augmented Lagrange function of the target function; (5) solving an algorithm of a target function, including setting an initialization parameter, updating an auxiliary variable z, and solving a gk + 1 sub-problem; and (6) completing image reconstruction according to the solved optimal gray value. The image reconstruction method for detecting the two-phase flow in the pipeline is high in real-time performance, the imaging quality is remarkably improved, the background is clear, and the anti-noise performance is good.

Description

technical field [0001] The invention belongs to the technical field of electrical tomography, and in particular relates to an image reconstruction method for detecting two-phase flow in a pipeline. Background technique [0002] Since two-phase flow systems are widely used in the fields of electric power, chemical industry, petroleum, thermal power generation, and aerospace, flow pattern identification of two-phase flow has also become the basis for online monitoring of two-phase flow, and is an important research direction of two-phase flow measurement. Gas-liquid two-phase flow often occurs in the transmission process of petroleum and chemical industry. Such as boiling of water in a container, air lift pump device, etc. The development of gas-liquid two-phase flow appeared in the 1930s. In the 1940s, due to many problems of multi-phase flow in chemical industry, scientists did some research on multi-phase flow in chemical industry. In the 1950s, due to the development of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
CPCG01N27/041
Inventor 施艳艳廖娟娟王萌李亚婷杨坷刘镇琨
Owner HENAN NORMAL UNIV