Particle velocity distribution arc static sensor array measuring method and device thereof

An electrostatic sensor and particle velocity technology, applied in measuring devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve the problem of inability to obtain particle velocity distribution information in pipelines, and achieve convenient signal processing, low price, and simple structure Effect

Active Publication Date: 2012-09-26
SOUTHEAST UNIV
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  • Claims
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Problems solved by technology

However, the electrostatic correlation and spatial filtering methods mainly use ring-shaped electrostatic sensors. Since the output signal of the ring-shaped electrostatic sensor is the superposition of the induced charges generated by all charged particles in its sensitive area, it is impossible to obtain the particle velocity distribution information on the pipeline section.

Method used

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  • Particle velocity distribution arc static sensor array measuring method and device thereof
  • Particle velocity distribution arc static sensor array measuring method and device thereof
  • Particle velocity distribution arc static sensor array measuring method and device thereof

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Embodiment 1

[0016] An arc-shaped electrostatic sensor array measurement method for particle velocity distribution is characterized in that an insulated measurement pipeline 6 is taken, and an electrode array 5 is arranged on the outer wall of the insulated measurement pipeline 6, and the electrode array 5 is an 8×10 electrode array, Each row of electrodes is distributed along the axial direction of the insulating measurement pipeline 6, the odd-numbered electrodes in each row of electrodes are electrically connected, the even-numbered electrodes in each row of electrodes are electrically connected, and then the odd-numbered electrodes in the i-th row of electrodes and the first The even-numbered electrodes in the i row of electrodes are connected to the first input terminal 10 and the second input terminal 11 of the i-th road differential amplifier circuit, wherein, i is the number of rows of any row of electrodes in the electrode array, and 1≤i≤8, and then The output signal of each charge...

Embodiment 2

[0018] A device for implementing an arc-shaped electrostatic sensor array measurement method for particle velocity distribution, comprising: an insulating measurement pipeline 6, a data acquisition card 3, and a frequency spectrum analysis for the output signal of the data acquisition card 3 to determine the peak frequency on the frequency spectrum , and then calculate and obtain the computer 4 of the particle velocity distribution of the gas-solid two-phase flow, the device also includes a charge differential amplification circuit, and an electrode array 5 is arranged on the outer wall of the insulating measurement pipeline 6, and the electrode array 5 is 8×10 electrodes array, each row of electrodes is distributed along the axial direction of the insulating measurement pipeline 6, the odd-numbered electrodes in each row of electrodes are electrically connected, the even-numbered electrodes in each row of electrodes are electrically connected, and the odd-numbered electrodes in...

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Abstract

The invention discloses a particle velocity distribution arc static sensor array measuring method and a device thereof. The method includes that an arc electrode array is arranged on a pipeline, when electriferous particle passes through the static sensor array, electrode group in each line of the electrode array generates two groups of static signals reflecting gas-solid flow information, the static signals are amplified by a differential amplifying circuit and then are input into a computer by a data acquisition circuit, frequency analysis is carried out on the differential static signals in the computer and peak frequency on spectrum is determined, further the average velocity of gas solid particles in the sensitive space of the electrode group is obtained, and all the electrode groupson the circumference are combined to realize velocity distribution measurement. Compared with single ring and multi-ring static induction filters, the arc static sensor array can realize particle velocity distribution measurement on the section of pipeline and has higher accuracy. The particle velocity arc static sensor array measuring device of the invention comprises a measuring probe, a chargedifferential amplifying circuit, a data acquisition card and a computer.

Description

technical field [0001] The invention belongs to the technical field of gas-solid two-phase flow measurement, and in particular relates to an arc-shaped electrostatic sensor array measurement method and device for particle velocity distribution. Background technique [0002] Gas-solid two-phase flow systems are widely used in energy, chemical, electric power and metallurgy industries. Realizing the particle velocity distribution measurement of gas-solid two-phase flow is of great significance for promoting the research of gas-solid two-phase flow mechanism and powder flow measurement, energy saving and control in the production process. At present, based on different measurement principles, people have developed a variety of non-contact particle velocity measurement methods, such as Doppler, cross-correlation, spatial filtering, direct observation and so on. The basic principle of Doppler particle velocity measurement is to use the movement of particles to cause the frequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/60G01P5/08
Inventor 许传龙李健高鹤明付飞飞王式民
Owner SOUTHEAST UNIV
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