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Microwave-imaging-fused electrical capacitance tomography method and device

A technology of electrical capacitance tomography and microwave imaging, which is applied in the direction of material capacitance, etc., can solve the problems of large distribution differences, increased iteration times, and slow convergence speed, so as to improve imaging speed, avoid local extreme values, and reduce iteration times. Effect

Inactive Publication Date: 2017-07-11
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Because the initial value of the conventional iterative algorithm is set to a zero vector, the initial value and the distribution of the real permittivity are quite different, which will lead to slow convergence (increase in the number of iterations) or even no convergence (falling into a local extremum)

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  • Microwave-imaging-fused electrical capacitance tomography method and device
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  • Microwave-imaging-fused electrical capacitance tomography method and device

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Embodiment Construction

[0038] 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.

[0039] figure 1 is a schematic diagram of the conventional electrical capacitance tomography method. figure 1 As shown in , when performing an iterative algorithm, the initial value is generally set to a zero vector, which usually leads to a long iteration time and results in non-convergent iterations.

[0040] figure 2 It is a process diagram of the electrical capacitance tomography method for fused microwave imaging according to the embodiment of the invention. The imaging method of the embodiment of the present invention comprises steps:

[0041] S1: Collect capacitance data and microwave imaging data measured in the area to be imaged;

[0042] S2: According to the iterative algorithm of image reconstruction and t...

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Abstract

The invention relates to a microwave-imaging-fused electrical capacitance tomography method including acquisition of electrical capacitance data and microwave imaging data measured in a to-be-imaged area; acquisition of dielectric constant distribution of a measured material in the to-be-imaged area according to image reconstruction iterative algorithm and the electrical capacitance data, wherein the dielectric constant distribution of microwave imaging data conversion in the iterative algorithm can be used as an initial iteration value. Iteration times can be reduced by the iterative algorithm, and imaging speed is improved, so that the iterative algorithm can be actually applied in circulating fluidized bed, coating and other processes, a more accurate gas solid concentration distribution image can be obtained, and the process can be more effectively monitored.

Description

technical field [0001] The invention relates to the field of electrical capacitance tomography, in particular to an electrical capacitance tomography method for fusing microwave tomography information, and a device for realizing the imaging method. Background technique [0002] Complex gas-solid flow systems widely exist in energy, pharmaceuticals, food processing, and other chemical industries, such as gas-solid flow in circulating fluidized bed risers and feeders, coating, granulation, and drying processes in the pharmaceutical industry. Real-time monitoring of complex gas-solid flow systems is of great significance to safe production and process optimization. Electrical Capacitance Tomography (ECT) is a real-time visual electrical tomography technology, which can obtain the gas-solid two-phase accumulation information of the cross-section of the area to be imaged, and can realize The real-time monitoring of gas-solid concentration in the flow process is widely used in th...

Claims

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Application Information

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IPC IPC(8): G01N27/22
Inventor 叶佳敏吴蒙王海刚
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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