ECT sensor structure optimization and electromagnetic field analysis method

An analysis method and sensor technology, which is applied in the direction of material analysis, material analysis, design optimization/simulation, etc. through electromagnetic means, can solve the problems that ECT sensor modeling analysis methods have not yet been reported in relevant literature, and achieve the reduction of non-uniformity characteristics, improved measurement accuracy, and convenient application

Active Publication Date: 2020-07-10
QINGDAO TECHNOLOGICAL UNIVERSITY
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Problems solved by technology

However, most of the current research on ECT sensors only focuses on the visual monitoring of two-phase flow in pipelines. In the field of concrete, there are very few patents related to ECT sensors, and there is no relevant literature on the specific modeling and analysis methods of ECT sensors. to report

Method used

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  • ECT sensor structure optimization and electromagnetic field analysis method
  • ECT sensor structure optimization and electromagnetic field analysis method
  • ECT sensor structure optimization and electromagnetic field analysis method

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Embodiment 1

[0039] The specific process of the ECT sensor structure optimization and electromagnetic field analysis method involved in this embodiment includes parameter setting, geometry setting, material setting, grid division, physical field setting, solution, sensor structure optimization and calculation of electromagnetic field distribution. Eight steps:

[0040] (1) Parameter setting: In COMSOL software (finite element analysis software), input the parameter values ​​of each component in the physical map of the ECT sensor sequentially under the global definition directory: the radius of the ECT sensor measurement field 1 is 7.5cm, and the PVC layer 2 The thickness is 0.5cm, the width and opening angle of copper electrode layer 3 are respectively 4cm and The embedding depth of the radial electrode layer 4 is 0, the radius of the air domain 5 is 10 cm, the radius of the shielding layer 6 is 10 cm, and the impurity area 7 is a water-containing area with a radius of 3 cm and 10×2 cm, s...

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Abstract

The invention belongs to the technical field of concrete durability monitoring. The invention particularly relates to an ECT sensor structure optimization and electromagnetic field analysis method. The technological process comprises eight steps including parameter setting, geometric setting, material setting, mesh generation, physical field setting, solving, sensor structure optimization and electromagnetic field distribution calculation. A new idea is provided for solving the positive problem of an ECT system based on software COMSOL. After modeling is completed, the uniformity degree of thesensitive field of an ECT sensor is analyzed through a calculation result, structure parameter values of all parts of the ECT sensor are adjusted, an optimal design scheme is searched for, meanwhile,change of the internal electromagnetic field when a concrete structure contains water can be visually and clearly observed, the relation between the internal moisture content of the concrete structure and the relative dielectric constant is obtained, the accuracy of imaging the internal moisture content of the concrete structure through the ECT technology is improved, and a new verification method is provided for the durability test of the concrete structure.

Description

Technical field: [0001] The invention belongs to the technical field of concrete durability monitoring, and specifically relates to an ECT sensor structure optimization and electromagnetic field analysis method, which can quickly solve the positive problem of ECT sensor imaging, and realize the structure optimization of the ECT sensor and accurate calculation and fast calculation of electromagnetic field changes in the measurement field. analyze. Background technique: [0002] The durability of concrete structures has always been a hot topic in the field of civil engineering. It is not only directly related to major issues such as energy saving, material saving and environmental protection, but also has a profound impact on the sustainable development of economy and society. There are many reasons for the durability failure of concrete structures, and the existence and migration of moisture are important incentives and key factors leading to insufficient durability: on the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22G01N33/38G06F30/23
CPCG01N27/221G01N27/223G01N33/383G01N27/24G01N27/226
Inventor 张鹏王文涛赵凯月鲍玖文赵铁军
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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