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Three-dimensional liquid-solid two-phase flow detection device and method based on electrical tomography

An electrical tomography and detection device technology, applied in the field of flow and concentration measurement in the process of dredging medium transportation, can solve problems such as lack of effective technology, application scenarios, and implementation methods that are not suitable for liquid-solid two-phase flow in industrial pipelines. The effect of reducing the amount of calculation and improving the accuracy

Active Publication Date: 2020-09-22
CHANGJIANG WUHAN WATERWAY ENG CO +1
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Problems solved by technology

[0005] However, the application fields of 3D electrical tomography are mainly in geological survey and medical detection, and its application scenarios and implementation methods are not suitable for liquid-solid two-phase flow in industrial pipelines. ET technology is used to analyze the real-time liquid-solid two-phase flow in pipelines Three-dimensional measurement lacks effective technology

Method used

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  • Three-dimensional liquid-solid two-phase flow detection device and method based on electrical tomography
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  • Three-dimensional liquid-solid two-phase flow detection device and method based on electrical tomography

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Embodiment 1

[0038] Such as figure 1 As shown, the three-dimensional liquid-solid two-phase flow detection device based on electrical tomography of the present invention is characterized in that it includes: a delivery pipeline 1, three sets of first electrode arrays 2 and several sets of second electrode arrays 3; Both the first electrode array 2 and several second electrode arrays 3 are used to establish a sensitive field. By applying an excitation signal to one end of a pair of electrodes and detecting a voltage or current signal on the remaining electrodes, it can be obtained that the internal transport of the pipeline 1 is The properties of the medium change.

[0039]The first electrode array 2 is used to establish a sensitive field. By applying an excitation signal to one end of a pair of electrodes and detecting a voltage or current signal on the remaining electrodes, the characteristic change of the conveying medium inside the conveying pipeline 1 can be obtained. In order to achi...

Embodiment 2

[0050] On the basis of Embodiment 1, this embodiment provides an actual application case. Taking the common 16-electrode sensor arrangement for industrial measurement as an example, that is, N=1, M=16, P=32, S=6, Z=3, a total of 9 layers of electrode arrays need to be installed on a section of pipeline 1, such as figure 2 As shown, they are respectively marked as A layer, B layer, C layer, D layer, E layer, F layer, G layer, H layer and I layer, wherein A layer is the first group of first electrode array 2, and E layer is the first electrode array 2. Two groups of first electrode arrays 2, layer I is the third group of first electrode arrays 2; as figure 2 , image 3 and Figure 4 As shown, the number of electrodes in each layer is 16, 32, 32, 32, 16, 32, 32, 32 and 16 respectively. Each layer of electrodes is labeled A1-A16, B1-B32, C1-C32, D1-D32, E1-A16, F1-F32, G1-G32, H1-H32 and I1-I32, of which A layer, E layer and I Layer 16 electrodes are arranged at equal interv...

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Abstract

The invention provides a three-dimensional liquid-solid two-phase flow detection device and method based on electrical tomography. Three sets of first electrode arrays with the same structure are arranged on the inner wall of a conveying pipeline at equal intervals; electrodes with the same serial number in each set of first electrode array are oppositely arranged along the axial direction of theinner wall of the conveying pipeline; long-axis end points of an ellipse are determined through the first set of first electrode array and the third set of first electrode array; short-axis end pointsof the ellipse are determined through the second set of first electrode array; several ellipses can be obtained by switching the long-axis end points of the ellipse and the short-axis end points of the ellipse; m cross sections along the radial direction of the conveying pipeline are selected between two adjacent sets of first electrode arrays on the conveying pipeline, wherein the intersection point of the single cross section and the M ellipses is the installation position of P electrodes in one set of second electrode array, so that the installation position of each electrode in the secondelectrode array is determined, the accuracy of the measurement result is improved, and the purpose of three-dimensional liquid-solid two-phase flow detection based on electrical tomography is achieved.

Description

technical field [0001] The invention relates to the technical field of flow and concentration measurement during dredging medium transportation, in particular to a three-dimensional liquid-solid two-phase flow detection device and detection method based on electrical tomography. Background technique [0002] Dredging is to dredge, widen or deepen waters such as rivers and lakes, and use manpower or machinery to carry out underwater earthwork excavation projects. The construction of rake suction, cutter suction, and bucket wheel dredgers uses hydraulic power to complete the transportation of dredged soil through pipelines. During the construction process, operators need to grasp the concentration parameters of liquid-solid two-phase flow in real time to control construction machines and tools to optimize construction efficiency. Managers also need to pass The construction output obtained by calculating the concentration and flow parameters realizes the management assessment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/07G01N27/10G01N27/22
CPCG01N27/07G01N27/10G01N27/226
Inventor 张群王仕辅李日新杜君梅张红漫李浩王磊李辛李蒙赵进张敏周麒张微
Owner CHANGJIANG WUHAN WATERWAY ENG CO
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