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Four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection

A technology of gas-liquid two-phase flow and conductivity probe, which is applied in the field of two-phase flow monitoring, can solve problems such as unsatisfactory measurement accuracy and difficult signal processing of conductivity probes, and achieve simplified processing, excellent anti-interference ability, and guaranteed measurement The effect of precision

Active Publication Date: 2016-09-28
CHONGQING UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of unsatisfactory measurement accuracy and difficult signal processing of conductivity probes in the process of real-time measurement of two-phase flow

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  • Four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection
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  • Four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0034] This embodiment discloses a four-conductivity probe measurement signal processing system for gas-liquid two-phase flow detection, including a detection module, four signal adjustment circuit modules, a power supply, a data acquisition card and a PC;

[0035] see figure 1 , the detection module includes four probes and a housing; the four probes are parallel to each other, and they are isolated from the housing by an insulator; the four probes are respectively marked as probes 1-4. In the ...

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Abstract

The invention discloses a four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection; voltage signals detected by probes are subjected to filtering, denoising, shaping and other processing, so that a signal acquired by a subsequent acquisition card can more really and conveniently show bubble information in a gas-liquid two-phase flow. For ensuring that the signals of the four probes are not affected with each other, at the same time, for ensuring that the amplitude of an output signal of a processing circuit conforms to the acquisition range of the acquisition card, and in the circuit design of the processing system, an isolated operation amplifier is used for each channel of signal and is used for isolating and amplifying the signal. In addition, because the precision of latter signal processing is directly affected by the amplitude and width of the probe signals, for ensuring the parameter-obtaining precision of the probe measurement system, the signal processing system adopts vast denoising measures in the aspects of signal conditioning and transmission, for example, connectors, shielding circuits, filter circuits and the like with good anti-interference performance are used.

Description

technical field [0001] The invention belongs to the technical field of two-phase flow monitoring. Background technique [0002] Gas-liquid two-phase flow is a common phenomenon in chemical production process. It is of great significance to measure the parameters of bubbles in gas-liquid two-phase flow. However, because the gas-liquid two-phase flow is a very complicated flow state, the measurement technology for bubbles is not yet perfect. So far, the main measurement methods are: conductivity probe method, electrical impedance tomography, CT imaging method, High-speed camera method, ultrasonic detection method, interferometry, etc. The camera method is a mature method, it does not disturb the flow field, but it is very difficult to take an image of a certain section in the center of the equipment, and it is not real-time, and it takes a long time for information processing; the electrical impedance tomography method can Two-phase flow images of radial sections can be obt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01M10/00
CPCG01M10/00G01N27/00
Inventor 周文雄潘良明刘航任全耀
Owner CHONGQING UNIV
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