Two-phase fluid mesh capacitance tomography method

A technology of capacitance tomography and mesh, which is applied in the direction of material capacitance, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., and can solve the problems that real-time imaging of two-phase fluid cannot be realized.

Inactive Publication Date: 2005-03-16
XI AN JIAOTONG UNIV
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  • Two-phase fluid mesh capacitance tomography method
  • Two-phase fluid mesh capacitance tomography method
  • Two-phase fluid mesh capacitance tomography method

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Embodiment Construction

[0036] figure 1 It is an intervening network capacitance tomography imaging system prepared according to the method of the present invention, which is composed of three parts: an intervening capacitance sensor, a data acquisition system and an imaging computer. Interventional capacitive sensor layouts such as figure 2 As shown, the insulated wire layer 1 and the wire layer 2 are arranged in the capacitive sensor, and the distance between the two layers is very close and parallel to each other. The insulated wire 1 or wire 2 of each layer is also parallel to each other and vertically fixed to the rotatable sensor housing. 4, the rotating mechanism is connected with the pipeline seal. Here each insulated wire 1 is used as the generating pole of the capacitance in the capacitive sensor, and the corresponding wire 2 directly behind them is the wire used to measure the corresponding capacitance, such as image 3 shown. The insulated wire 1 is coated with a thin insulating layer...

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Abstract

This invention discloses biphase current mesh capacitor tomography. The one pole of the insert mesh capacitor is a metal core in the insulation wire and the other pole is formed by the contact surface of conduct phase and mesh or wet surface in the biphase current and its surface insulation layer serves as dielectric between electrodes and identifies the capacitor value. The insert mesh capacitor sensor high-speed scan the biphase current in the pipe driven by electric or self rotation apparatus and gets the project information to different directions on the pipe section of biphase current and gets real time image of the biphase current. The insert capacitor sensor identifies local distribution information of the biphase current on whole pipe or container section and directly gets the real time image of the biphase current.

Description

technical field [0001] The invention relates to two-phase fluid tomography, in particular to a method for two-phase fluid mesh capacitance tomography. Background technique [0002] Two-phase flow phenomena widely exist in petroleum, chemical, energy and power engineering fields, but the mechanism and numerical simulation calculations related to two-phase flow are still very rough and cannot meet the needs of modern engineering development. The main reason is the lack of effective two-phase flow detection means, especially the multi-dimensional dynamic measurement means in the process of two-phase flow. In multiphase flow parameter detection, process tomography technology can obtain two-dimensional / three-dimensional spatiotemporal local microscopic distribution information of multiphase fluid, which is an important step in the field of multiphase flow where the flow characteristics are complex and changeable, and conventional methods are difficult to detect parameters. It pr...

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Application Information

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IPC IPC(8): G01N27/22G01R27/26
Inventor 张修刚王栋林宗虎
Owner XI AN JIAOTONG UNIV
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