Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Direct image reconstruction method based on capacitance tomography of round sensor

A technique of capacitance tomography, a direct method, used in instrumentation, measuring electrical variables, measuring resistance/reactance/impedance, etc.

Active Publication Date: 2011-08-17
BEIHANG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the existence of a shielding layer in the ECT sensor, and the electrical resistance tomography in the literature uses an excitation measurement strategy of current excitation and voltage measurement, while ECT uses an excitation measurement mode of voltage excitation and current measurement, Calderon’s algorithm cannot be directly used. in ECT

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Direct image reconstruction method based on capacitance tomography of round sensor
  • Direct image reconstruction method based on capacitance tomography of round sensor
  • Direct image reconstruction method based on capacitance tomography of round sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] In the process of image reconstruction by the method of the present invention, the applied sensor is as attached figure 1 As shown, it is mainly composed of a three-layer structure, the outer layer is a metal tube layer 1 for structural fixing and shielding, the middle structural layer is an insulating material layer 2, and the inner structural layer 3 is attached to the insulating material layer 2 to realize resistance. N electrodes for simultaneous measurement of the real part and the imaginary part, the electrodes are evenly distributed on the same circle, and the adjacent electrodes are insulated from each other.

[0059] The present invention is a direct image reconstruction method based on electric capacitance tomography of a circular sensor, comprising the following specific operation steps:

[0060] Step 1: For an ECT sensor with N electrodes on the same section, label the N electrodes counterclockwise as electrode i (1≤i≤N), and adopt the traditional 1-by-1 exc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a direct image reconstruction method based on the capacitance tomography of a round sensor. The method comprises the following operation steps: 1. N electrodes of an ECT sensoThe invention relates to a direct image reconstruction method based on the capacitance tomography of a round sensor. The method comprises the following operation steps: 1. N electrodes of an ECT sensor, which are arranged on the same cross section, are counterclockwise marked as electrodes i (i is larger than or equal to 1 and is smaller than or equal to N) and a traditional 1-by-1 excitation measr, which are arranged on the same cross section, are counterclockwise marked as electrodes i (i is larger than or equal to 1 and is smaller than or equal to N) and a traditional 1-by-1 excitation measuring mode is adopted, i.e. a scanning process comprises N-1 actions; 2. measured capacitance values are firstly pre-treated by linear transform to obtain N*(N-1) / 2 independent measured charge changeuring mode is adopted, i.e. a scanning process comprises N-1 actions; 2. measured capacitance values are firstly pre-treated by linear transform to obtain N*(N-1) / 2 independent measured charge changevalues; 3. the scattering transformation t(s) of discrete electrodes is calculated; and 4. the specific inductive capacity variation of any point is rebuilt. The invention aims at a round measuring revalues; 3. the scattering transformation t(s) of discrete electrodes is calculated; and 4. the specific inductive capacity variation of any point is rebuilt. The invention aims at a round measuring region, overcomes the defects that a traditional algorithm needs to calculate a sensitivity matrix and can not independently calculate the rebuilding result of a subregion, directly rebuilds images accogion, overcomes the defects that a traditional algorithm needs to calculate a sensitivity matrix and can not independently calculate the rebuilding result of a subregion, directly rebuilds images according to capacitance measuring values and can directly rebuild images in the subregion. The method has high real-time performance, can be popularized to ECT and has important practical values and applrding to capacitance measuring values and can directly rebuild images in the subregion. The method has high real-time performance, can be popularized to ECT and has important practical values and application prospects.ication prospects.

Description

(1) Technical field [0001] The invention relates to an image reconstruction method, in particular to a direct method of image reconstruction based on electric capacitance tomography of a circular sensor. The invention belongs to the technical field of image reconstruction. (2) Background technology [0002] Electrical capacitance tomography (ECT) is based on the measured capacitance data to reconstruct the distribution of the space permittivity of insulating materials. ECT has several advantages over other tomographic techniques such as: low cost, fast response, portability, non-invasiveness and robustness. It has broad application prospects in many industrial fields. The core technology of ECT is to use the image reconstruction method to reconstruct the variation of the internal permittivity distribution according to the variation of a set of measured values ​​of boundary capacitance. [0003] In the past, most image reconstruction algorithms were based on the sensitivity...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
Inventor 曹章徐立军丁洁
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products