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Identifier of gas liquid two phase flow pattern based on resistance chromatographic imaging and its method

A technology of electrical resistance tomography and gas-liquid two-phase flow, which is applied in the field of measurement, can solve the problems of not being able to express the two-dimensional or three-dimensional information of the pipeline section well, the identification of flow patterns, and the limitation of the measurement information range. Convenient adjustment and control, simple structure, good real-time effect

Inactive Publication Date: 2005-08-24
TIANJIN UNIV
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Problems solved by technology

The traditional technology is to use the method of flow pattern discriminant diagram and discriminant formula to realize the online flow pattern identification
However, the traditional single-point measurement and continuous time series signal analysis methods cannot express the two-dimensional or three-dimensional information of the pipeline section well due to the limitation of the measurement information range, so the measurement accuracy is not high.

Method used

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  • Identifier of gas liquid two phase flow pattern based on resistance chromatographic imaging and its method
  • Identifier of gas liquid two phase flow pattern based on resistance chromatographic imaging and its method
  • Identifier of gas liquid two phase flow pattern based on resistance chromatographic imaging and its method

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0032] In Fig. 1, an identifier for gas-liquid two-phase flow pattern identification based on electrical resistance tomography, its microcomputer 14 is composed of conductor and photoelectric isolation 13, bus 12, excitation electrode selection analog switch 4, electrode drive 3 One end, the input pole of the sensor 15 is connected sequentially; the output pole of the sensor 15 is driven by a conductor and an electrode. The other end, the detection electrode selection analog switch 5, the band-pass filter unit A6, the differential amplifier unit 8, and the phase-sensitive demodulation unit 9 , low-pass filter unit 10, analog-to-digital conversion module 11, and bus 12 are sequentially connected: the bus 12 is sequentially connected with the other end of the sine wave generator 1, voltage-controlled current source 2, and excitation electrode sel...

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Abstract

The invented identifier for recognizing the flow-pattern of gas-liquid two-phase flow includes microcomputer, photoelectricity isolation, bus, sensor, phase sensitivity demodulation unit, A / D converter and low pass filter, etc., these parts are connected in sequence. The invented method includes the following three steps: The three-dimension information of flow patterns is sampled in time interval. The sample information is composed. The characteristic data of the three-dimensional information are output. The target vectors are defined and each parameter of the neural network is determined. The emulation and comparing the target vectors are carried out so as to obtain the flow pattern.

Description

technical field [0001] The invention belongs to the measurement category, and in particular relates to an identifier and an identification method for identifying gas-liquid two-phase flow patterns. Background technique [0002] At present, the well-known industrial process tomography (ProcessTomography) is a kind of process parameter (two-dimensional or three-dimensional distribution status) with two-phase flow or multi-phase flow as the main research object, which was formally formed and developed in the mid-1980s. ) online real-time measurement technology. Electrical Resistance Tomography (Electrical Resistance TomograDhy, referred to as ERT) technology is a simplified form of Electrical Impedance Tomography (Referred to as EIT) technology, one of the PT technologies. The real part information is only applicable to the measurement occasion where the liquid phase is the continuous phase. The main principle of ERT technology is based on th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G01N27/06G01T1/00G01T7/00
Inventor 董峰徐安姜之旭乔旭彤
Owner TIANJIN UNIV
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