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Non-contact electrical resistance tomography data acquisition device and method

A resistance tomography, non-contact technology, applied in the field of detection, can solve the problems affecting the flexibility and applicability of measurement, and achieve the effects of simple implementation, convenient installation, and expansion of the scope of application

Inactive Publication Date: 2013-01-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can increase the measurement range and improve the resolution, but once the measurement target changes, the frequency of the excitation signal source must also change with the change of its internal capacitance, which undoubtedly brings a lot of inconvenience to the measurement and affects the flexibility of the measurement and applicability

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  • Non-contact electrical resistance tomography data acquisition device and method

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Embodiment Construction

[0029] Such as figure 1 , 2As shown, the non-contact electrical resistance tomography data acquisition device is composed of a sensor, a data acquisition module 5 and an image reconstruction computer 6, the sensor is connected to the data acquisition module 5, and the data acquisition module 5 is connected to the image reconstruction computer 6; the sensor includes an insulating pipeline 1. A plurality of rectangular metal electrodes 2, a plurality of phase-sensitive demodulation modules 3 and a direct digital frequency synthesizer module 4, a plurality of rectangular metal electrodes 2 are installed at equal intervals around the insulation pipe 1, and a plurality of rectangular metal electrodes 2 It is connected to the input port of the corresponding phase-sensitive demodulation module in the plurality of phase-sensitive demodulation modules 3, and the plurality of phase-sensitive demodulation modules 3 are connected to the direct digital frequency synthesizer module 4 after ...

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Abstract

The invention discloses a non-contact electrical resistance tomography data acquisition device and a method. The device comprises a sensor, a data acquisition module, and an image reconstruction computer; the sensor is connected to the data acquisition module; and the data acquisition module is connected to the image reconstruction computer. The sensor comprises an insulating pipeline, rectangular metal electrodes, phase-sensitive demodulation modules, and a direct digital frequency synthesizer module. The metal electrodes are mounted at the periphery of the insulating pipeline with an equal interval; respective phase-sensitive demodulation module is fixed on each metal electrode; the phase-sensitive demodulation modules are parallelly connected by arranging wires and are connected to thedirect digital frequency synthesizer module; all the phase-sensitive demodulation modules are connected to the data acquisition module by arranging wires. The device of the invention effectively overcomes the problems of electrode polarization and chemical corrosion of contact electrical resistance tomography (ERT), and has the advantages of simple structure, non contact, strong adaptability, andthe like. The invention provides beneficial reference for the non-contact electrical resistance tomography of 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 data acquisition device and method. Background technique [0002] As one of the current research hotspots of process tomography (PT), electrical resistance tomography (ERT) technology has broad application prospects in many industrial fields such as metallurgy, petroleum, papermaking, and environmental engineering. Compared with other PT technologies such as nuclear magnetic resonance, it has the advantages of low cost, simple structure, good safety and easy operation. [0003] However, the existing ERT technology uses a contact measurement method, and its electrodes are bound to be in direct contact with the internal measured medium, which will cause problems such as electrode polarization effects and electrochemical corrosion, which will affect the accuracy of the measurement. Sex and image quality have a big impact. Moreover, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/08
Inventor 王保良胡源渊冀海峰黄志尧李海青
Owner ZHEJIANG UNIV
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