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Mobile imaging device based on capacitance tomography sensor

A technology of electrical capacitance tomography and imaging devices, which is applied in the field of sensors, can solve the problems that have not yet reached three-dimensional ECT imaging, and achieve the effect of accurate measurement

Active Publication Date: 2022-01-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the three-dimensional ECT imaging technology is still in its infancy. Many researchers in the world are exploring how to realize the three-dimensional three-dimensional electric capacitance tomography. So far, there is no ideal three-dimensional ECT imaging result.

Method used

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  • Mobile imaging device based on capacitance tomography sensor
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  • Mobile imaging device based on capacitance tomography sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0097] To measure a static object with a height of about 5 mm and perform three-dimensional image reconstruction on it, use the above-mentioned imaging device provided by the application, including two parts of the sensor and the sensor movement control system, and the sensor is an electrical capacitance tomography sensor composed of 16 measuring electrodes 8 , the outer diameter of the pipeline 11 is 50mm, the height of the measuring electrode 8 is 25mm, the measuring electrodes 8 are evenly distributed on the outer wall of the pipeline 11, the shaft end electrodes 9 are arranged on both sides of the measuring electrode 8, and the outer space of the electrodes is provided with a shielding layer; the sensor movement control The system includes a control panel 1, a programmable logic controller (PLC), a servo driver 3, a servo motor 4, a ball screw, a motion fixture 71 and a position adjustment system, an auxiliary fixture 72, a position adjustment system and a system support fra...

Embodiment 2

[0099] Measure a static object with a height of about 10mm and perform three-dimensional image reconstruction on it, using a mobile ECT sensor that can obtain three-dimensional images, including two parts: the sensor and the sensor mobile control system. The sensor is a capacitor composed of eight measuring electrodes 8 For a tomographic imaging sensor, the inner diameter of the pipeline 11 is 60mm, and the height of the measuring electrode 8 is 30mm. The measuring electrodes 8 are evenly distributed on the inner wall of the pipeline 11 and are in the shape of a "middle", that is, the upper and lower sides of the body 81 of the measuring electrode 8 are directed towards the pipeline 11. The outer wall extends out of the same material in the shape of a slender strip. The measuring electrode 8 is attached to the inner wall of the pipe 11 and is drawn out of the pipe 11 through one of the strip connections through the pipe wall to connect with the core of the signal transmission ca...

Embodiment 3

[0101] Measure a fast flowing fluid with a speed of 0.3m / s from bottom to top and reconstruct its three-dimensional image. A mobile ECT sensor that can obtain three-dimensional images is used, including two parts: the sensor and the sensor mobile control system. The sensor is An electrical capacitance tomography sensor composed of six measuring electrodes 8, the outer diameter of the pipeline 11 is 108 mm, the height of the measuring electrodes 8 is 40 mm, the measuring electrodes 8 are distributed on the outer wall of the pipeline 11, and shaft end electrodes 9 are arranged on both sides of the measuring electrodes 8, The outer space of the measuring electrode 8 is provided with a shielding layer; the sensor movement control system includes a touch screen, a programmable logic controller (PLC), a servo drive 3, a servo motor 4, a ball screw, a motion fixture 71, a position adjustment system and a system support frame The sensor is fixed on the motion fixture 71, the moving spe...

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Abstract

The present application discloses a mobile imaging device based on a capacitance tomography sensor, including: a capacitance tomography sensor, a moving fixture and an auxiliary fixture, and the moving fixture and the auxiliary fixture hold the sample to be tested or the capacitance tomography sensor respectively; The moving fixture performs measurement movement relative to the auxiliary fixture; the electric capacitance tomography sensor is used to measure the section to be measured of the sample to be tested, and obtain a two-dimensional image of each section of the sample to be tested. When the moving speed of the sample to be measured is fast, it is necessary to increase the number of measured sections and reduce the measurement interval. Using this device for imaging measurement can effectively improve the quality of the three-dimensional reconstruction image and greatly increase the movement of the sample that can be measured by the 3D ECT sensor. speed range.

Description

technical field [0001] The application relates to a mobile imaging device based on an electrical capacitance tomography sensor, which belongs to the field of sensors. Background technique [0002] Three-dimensional electrical capacitance tomography (3D ECT) technology is one of the process tomography technologies. A certain number of electrodes are covered inside or outside the container to form a capacitive sensor. When the concentration of the medium in the sensitive area of ​​the sensor changes, it will cause The change of the equivalent dielectric constant, the capacitance change between the measurement electrode and the detection electrode, and the capacitance data are measured. According to the corresponding image reconstruction method, the concentration of the corresponding medium at the measured section is obtained, and then a two-dimensional or three-dimensional image about the concentration is obtained. ECT sensor includes three parts: sensor system, data acquisit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/22
CPCG01N27/22G01N27/221G01N27/226
Inventor 叶茂申敬敬孟霜鹤刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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