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Contactless electrical resistance tomography (ERT) measurement device and method

A resistance tomography, non-contact technology, applied in the detection field, can solve problems such as corrosion, achieve the effect of overcoming electrode polarization, simple implementation, and convenient installation

Inactive Publication Date: 2011-09-14
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Aiming at the current development status of electrical resistance tomography, the present invention proposes a measurement system for electrical resistance tomography based on the principle of capacitive coupling, which overcomes the problems of electrode polarization and corrosion in existing ERT, and improves measurement accuracy and image quality

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  • Contactless electrical resistance tomography (ERT) measurement device and method
  • Contactless electrical resistance tomography (ERT) measurement device and method
  • Contactless electrical resistance tomography (ERT) measurement device and method

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Embodiment Construction

[0022] Such as figure 1 As shown, the non-contact electrical resistance tomography measuring device is composed of a resistance sensor, a data acquisition module 4 and a computer 5, the resistance sensor is connected to the data acquisition module 4, and the data acquisition module 4 is connected to the computer 5; the resistance sensor includes an insulating pipeline 1. Rectangular metal electrodes 2 and excitation / detection modules 3. The metal electrodes 2 are installed on the outer wall of the insulating pipe 1 at equal intervals. Each metal electrode 2 is fixed with its own excitation / detection module 3. All excitation / detection modules 3 is connected with the data acquisition module 4 through a cable.

[0023] Such as figure 2 As shown, the excitation / detection module 3 includes a quartz crystal, a first switch, an AC excitation source, a current / voltage conversion circuit, a rectification filter circuit, a second switch, a control bus and a data bus; the first port of...

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Abstract

The invention discloses a contactless electrical resistance tomography (ERT) measurement device and a contactless ERT measurement method. The device consists of a resistance sensor, a data acquisition module and a computer, wherein the resistance sensor is connected with the data acquisition module; and the data acquisition module is connected with the computer. The resistance sensor comprises an insulated pipeline, rectangular metal electrodes and excitation / detection modules, wherein the metal electrodes are arranged on the outer wall of the insulated pipeline in equal distance; respective excitation / detection module is fixed on each metal electrode; and all the excitation / detection modules are connected with the data acquisition module through flat cables. The device effectively solves the problems of electrode polarization, corrosion and the like of contact ERT, simultaneously has advantages of convenience in installation, simple structure, non intrusion, no influence on the flow of the fluid in the pipeline and the like, and provides useful reference for the contactless ERT of the two-phase fluid.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a non-contact electrical resistance tomography measuring device and method. Background technique [0002] Electrical Resistance Tomography (ERT) technology is an important branch of current two-phase flow process tomography (Process Tomography, PT) technology. The principle of this technology is to reconstruct the image of the medium distribution by obtaining the conductivity distribution information of the medium on the pipeline section. Compared with PT technologies such as ray PT and optical PT, this technology has been widely concerned and valued by researchers due to its low cost, simple structure, good safety and easy operation, and has become a leading technology in process tomography. Research hotspots. [0003] However, the current ERT technology is a contact measurement method, its electrodes are in direct contact with the measured fluid, there are problems such as ...

Claims

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Application Information

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IPC IPC(8): G01N27/08
Inventor 王保良傅三富冀海峰黄志尧李海青
Owner ZHEJIANG UNIV
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