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A method for constructing a current-voltage map from a voltage-current map

A technology of current mapping and construction methods, applied in the direction of material analysis, measuring devices, instruments, etc. through electromagnetic means, can solve problems such as current-voltage mapping without construction

Active Publication Date: 2016-04-06
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no direct construction method for constructing the current-voltage map from the voltage-current map

Method used

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  • A method for constructing a current-voltage map from a voltage-current map
  • A method for constructing a current-voltage map from a voltage-current map
  • A method for constructing a current-voltage map from a voltage-current map

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Embodiment Construction

[0056] see figure 1 , an algorithm block diagram of a construction method for constructing a current-voltage map according to a voltage-current map. by figure 2 The 16 ring-shaped resistor networks connected end to end are taken as an example to illustrate the specific implementation of the method.

[0057] The method comprises the steps of:

[0058] Step 1. The current density on the electrodes of a sensor with N=16 electrodes has a general expression Written in matrix form:

[0059] J = 1 A C · V - - - ( 20 )

[0060] Where J is the current density vector, A is the inner surface area of ​​each electrode, C is the capacitance matrix, and V is the voltage vector, the expression is:

[0061] C = C 1,1 ...

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Abstract

The invention relates to a method for constructing current-voltage mapping by virtue of voltage-current mapping. The method is characterized in that for a sensor with N electrodes in electric tomography, a current-voltage matrix is exclusively calculated through a derived formula through the parameters such as characteristic value and characteristic vector of a voltage-current matrix so as to construct the current-voltage mapping. The invention provides a method for directly constructing the current-voltage mapping, the method can be applied to the direct reconstruction algorithm in the field of the electric tomography, the physical significance of the method is clear, and the method is simple and feasible.

Description

technical field [0001] The invention relates to the field of electrical tomography, in particular to a method for constructing a current-voltage mapping from a voltage-current mapping. Background technique [0002] Electrical tomography (ET for short) technology is a kind of tomography technology. By applying excitation to the measured object and detecting the change of its boundary value, a specific reconstruction algorithm is used to reconstruct the distribution of the internal electrical characteristic parameters of the measured object, so as to obtain the internal distribution of the object. Compared with other tomography techniques, electrical tomography has the advantages of no radiation, non-invasiveness, portability, fast response, and low price. [0003] Electrical tomography reconstruction algorithms can generally be divided into two categories: sensitivity matrix-based reconstruction algorithms and direct reconstruction algorithms. Using the former usually requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
Inventor 曹章徐立军黄驰孙世杰
Owner BEIHANG UNIV