CN104287730A - Detection design method for electrical impedance imaging - Google Patents
Detection design method for electrical impedance imaging Download PDFInfo
- Publication number
- CN104287730A CN104287730A CN201310030888.9A CN201310030888A CN104287730A CN 104287730 A CN104287730 A CN 104287730A CN 201310030888 A CN201310030888 A CN 201310030888A CN 104287730 A CN104287730 A CN 104287730A
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- China
- Prior art keywords
- electrical impedance
- design method
- impedance imaging
- detection design
- imaging according
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003384 imaging method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000001228 spectrum Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims 1
- 238000004441 surface measurement Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 abstract 2
- 238000000691 measurement method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Molecular Biology (AREA)
- Public Health (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a design method for detecting electrical impedance distribution in an object through a simple and practical electrical impedance imaging method. The design method includes a design method for arranging sensors on the surface of a three-dimensional object, a measurement method and a subsequent matrix numerical value calculation method. According to the design method based on electrical impedance imaging, data are acquired through simple surface measurement of current and voltage, the acquired data are input into a specific embedded special computer system through a multi-channel A/D conversion interface circuit, and electrical impedance distribution imaging results in all objects are acquired through matrix numerical value calculation.
Description
Technical field
Patent of the present invention relates to the nondistructive detecting method of three-dimensional body internal electrical impedance, adopts the method for electrically of most simple general-purpose to design, the method design that the imaging being specifically related to the electrical impedance of three-dimensional body inside is formed.
Background technology
The imaging of interior of articles has been task common in daily life and industrial detection, but current technical method costly, not easily universal popular.Current most of technology is used in medical imaging field, the perspective method of such as X-ray, B ultrasonic acoustic wave methodogy.
Summary of the invention
Patent of the present invention needs the problem solved to be how profit, electronically by measuring electric current and the voltage of simple body surface, carries out imaging formation to the structure of interior of articles.
The thinking of patent of the present invention is dealt with problems like this: set distinctive measurement point at body surface, effects on surface injects specific electric current, and then the current value measured magnitude of voltage on each measurement point and flow through, finally by the higher-order spectrum autocorrelation matrix analyzing the voltage and current value obtained, obtain the electrical impedance distribution of interior of articles, the final end product obtaining imaging.
The resolution obtaining internal structure of body according to patent of the present invention depend on surface measurement point number and the distribution of measurement point upper sensor.
In order to suppress measurement noises, patent of the present invention adopts the calculating method for designing of the voltage and current autocorrelation matrix based on higher order statistical and higher-order spectrum.
Accompanying drawing explanation
Further patent of the present invention is described in detail below in conjunction with accompanying drawing and instantiation.
Fig. 1 is the design principle figure of an embedded dedicated computer system of typical case in patent specific embodiment of the present invention.
Fig. 2 is the concrete implementing procedure of the internal imaging process of embedded dedicated computer system shown in Fig. 1.
As shown in Figure 1, patent of the present invention comprises CPU, the embedded computer system that multi-channel A/D conversion interface circuit and display circuit are formed, and is characterized in multi-channel A/D conversion interface circuit, the sensor location configuration of body surface.Depend on the size that need obtain internal resolution, the sensor configuration of body surface can closely also can be sparse.
As shown in Figure 2, the internal imaging handling process of patent of the present invention specifically comprises; After electric current on each measurement point and magnitude of voltage being changed by A/D, the autocorrelation matrix being carried out higher order statistical by CPU calculates, and by subspace fitting core algorithm, finally extrapolates all possible imaging results.
The foregoing is only the preferred embodiment of patent of the present invention.All equalizations done according to Patent right requirement scope of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (8)
1. the detection design method based on electrical impedance imaging, specific embedded computer system, comprise multi-path A/D conversion interface circuit, CPU microprocessor and display circuit, it is characterized in that, be also included in the sensor array column distribution being placed in body surface for inputting simultaneously that described specific embedded computer system connects.
2. the detection design method of electrical impedance imaging according to claim 1, is characterized in that, in described sensor, all the sensors is uniformly distributed in three-dimensional object surface.
3. the detection design method of electrical impedance imaging according to claim 1, is characterized in that, in described sensor, according to the needs of inspected object internal resolution, some sensors are tightr in specific location arrangements.
4. the detection design method of electrical impedance imaging according to claim 1, is characterized in that, in described sensor, according to the needs of inspected object internal resolution, some sensors are more sparse in specific location arrangements.
5. the detection design method of electrical impedance imaging according to claim 1, is characterized in that, the current value on Measuring Object surface probe and magnitude of voltage.
6. the detection design method of electrical impedance imaging according to claim 5, is characterized in that, on the basis of Measuring Object surface voltage value and current value, by specific numerical computation method, obtains internal imaging result.
7. the detection design method of electrical impedance imaging according to claim 6, is characterized in that, the method for designing analyzed by the autocorrelation matrix obtaining the higher-order spectrum of voltage and current value.
8. the detection design method of electrical impedance imaging according to claim 6, is characterized in that, by obtaining the numerical computation method of solution of inverse problems and the algorithm design of solution of inverse problems of voltage and current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310030888.9A CN104287730A (en) | 2013-01-25 | 2013-01-25 | Detection design method for electrical impedance imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310030888.9A CN104287730A (en) | 2013-01-25 | 2013-01-25 | Detection design method for electrical impedance imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104287730A true CN104287730A (en) | 2015-01-21 |
Family
ID=52307874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310030888.9A Pending CN104287730A (en) | 2013-01-25 | 2013-01-25 | Detection design method for electrical impedance imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104287730A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007070997A1 (en) * | 2005-12-20 | 2007-06-28 | Dixtal Biomedica Industria E Comercio Ltda. | Electrode assembly for electrical impedance tomography |
| CN102274025A (en) * | 2011-05-30 | 2011-12-14 | 郑州大学 | Multi-electrode electrical impedance tomography data acquisition system |
| CN102551713A (en) * | 2012-01-11 | 2012-07-11 | 中国人民解放军国防科学技术大学 | Multi-electrode electrical impedance tomography collection device |
-
2013
- 2013-01-25 CN CN201310030888.9A patent/CN104287730A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007070997A1 (en) * | 2005-12-20 | 2007-06-28 | Dixtal Biomedica Industria E Comercio Ltda. | Electrode assembly for electrical impedance tomography |
| CN102274025A (en) * | 2011-05-30 | 2011-12-14 | 郑州大学 | Multi-electrode electrical impedance tomography data acquisition system |
| CN102551713A (en) * | 2012-01-11 | 2012-07-11 | 中国人民解放军国防科学技术大学 | Multi-electrode electrical impedance tomography collection device |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |