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Charge induction dust concentration detection method based on active charging

A dust concentration detection and charge induction technology, used in measurement devices, suspension and porous material analysis, instruments, etc., can solve the problems of weak signal, low test accuracy of low concentration dust, limited test range, etc. effect of error

Pending Publication Date: 2022-05-27
CHINA COAL TECH ENG GRP CHONGQING RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In summary, scholars at home and abroad are focusing on the research of electrostatic charge induction dust concentration detection method, but this method has the defects of weak signal and easy to be interfered, and the low test accuracy of low concentration dust limits its test range

Method used

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  • Charge induction dust concentration detection method based on active charging
  • Charge induction dust concentration detection method based on active charging
  • Charge induction dust concentration detection method based on active charging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] like figure 2 As shown in the figure, this embodiment provides a device for detecting the signal-to-noise ratio of dust induction signals, the device includes two parts of dust active charging and induction signal detection, wherein the active charging part includes a quantitative dust generator, a high-voltage power supply, a charging Electric device, the induction signal detection part includes induction detection electrode, signal measurement device, oscilloscope, etc. The principle of the whole device: After the dust is actively charged, the charged dust will generate an induced charge when it passes through the detection electrode, and the digital signal obtained by the induction signal processing circuit will be imported into the single-chip microcomputer for processing, and finally the value will be uploaded and recorded through the display communication circuit.

[0052] 1) Signal-to-noise ratio test under different conditions:

[0053] This technology can onl...

Embodiment 2

[0095] Example 2: Error test of charge-induced dust concentration detection based on active charging

[0096] Through the research of Example 1, the charging voltage and detection lower limit of the charge-induced dust concentration detection technology based on active charging are clarified. When used in the field, the dust sampler can be used for preliminary detection to find out the dust concentration range of the workplace, and then the active charging voltage can be adjusted, and the active charging charge induction dust concentration sensor can be used for real-time detection.

[0097] The charge induction dust concentration detection technology based on active charging in the present invention is just in contrast to the charge induction dust concentration detection technology without active charging (electrostatic charge induction dust concentration detection technology). A comparative test is carried out under the environment to verify the scientificity of the technolo...

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Abstract

The invention relates to a charge induction dust concentration detection method based on active charging, and belongs to the technical field of dust concentration detection. The method comprises the following steps: S1, performing active charging on dust particles at a charge induction front end, and constructing a charge induction dust concentration model based on active charging; s2, calculating the signal-to-noise ratios of dust induction signals of different types of dust under different charge voltages, and finding out an active charge voltage value which can meet the signal-to-noise ratio detection requirement and does not generate breakdown according to the relationship between the charge voltage of each type of dust at the lowest extractable signal-to-noise ratio and the dust concentration; and S3, adopting a test comparison method to obtain different dust detection concentration lower limit values meeting the signal-to-noise ratio requirements. According to the invention, the relative error of dust concentration detection is reduced.

Description

technical field [0001] The invention belongs to the technical field of dust concentration detection, and relates to a charge induction dust concentration detection method based on active charging. Background technique [0002] At present, the mainstream method for detecting dust concentration is the charge induction method, which has the advantages of good pollution resistance and minimal maintenance workload. Scholars at home and abroad have carried out related research on this. Chen Jiange et al. reduced the error of electrostatic charge induction detection of dust concentration by improving the induction electrode; Liu Dandan et al. proposed a combined measurement pipeline structure based on Bernoulli effect and Karman vortex street effect, which solved the problem of electric charge in low dust concentration environment. The problem of low measurement accuracy of induction dust concentration; Liu Ruochen et al. obtained the three-dimensional spatial distribution law of m...

Claims

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Application Information

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IPC IPC(8): G01N15/06
CPCG01N15/06G01N15/0656
Inventor 赵政惠立锋李德文吴付祥刘国庆颜鸽来晏丹焦敏张强石婧邓有凡李征真邓勤王迪罗小博
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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