Device and method for accurately measuring concentration of low-concentration dusts

A technology for precise measurement and dust concentration, which is applied in the direction of measuring devices, suspension and porous material analysis, particle suspension analysis, etc., can solve the problems of low reliability, poor accuracy, and low precision, and achieve accurate detection and repeatability errors Small, broadly applicable effects

Inactive Publication Date: 2018-01-19
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems of low reliability, poor accuracy, large error and low precision of the existing dust concentration measuring device and method, the present invention provides a device and method for accurately measuring low-concentration dust concentration. Based on the principle of charge induction, through On the basis of the existing detection straight pipe, the left and right ends of the test straight pipe are respectively connected with a trumpet-shaped intake pipe and a diffuser pipe, and the Venturi effect is used to increase the flow rate of the dust airflow during detection, thereby increasing the amount of induced charge, and efficiently and accurately detect low concentrations dust concentration

Method used

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  • Device and method for accurately measuring concentration of low-concentration dusts
  • Device and method for accurately measuring concentration of low-concentration dusts
  • Device and method for accurately measuring concentration of low-concentration dusts

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Embodiment 1

[0024] The invention provides a device for accurately measuring the concentration of low-concentration dust, the structure of which is shown in the attached figure 1 As shown, it includes the test channel 2, the charge induction component 3 extending into the test channel 2 and the supporting airflow drive device. The test channel 2 is a straight pipe, and the charge induction component 3 is a charged particle induction ring. The sensor and the transmitter are composed of two parts. The transmitter includes an electronic amplifier circuit, which is assembled from general electronic devices. It can amplify the voltage signal measured by the electrostatic sensor and convert and output a standard current signal of 4-20mA. The key of the present invention is that the front end of the test channel 2 is connected with the trumpet-shaped air intake pipe 1, and the rear end is connected with the horn-shaped diffuser pipe 6, and the connection between the air intake pipe 1 and the diffu...

Embodiment 2

[0030] The device also includes a filter paper 7 positioned at the outlet of the test channel 2 by means of a clamping assembly 5, the clamping assembly can prevent the filter paper 7 from moving or falling off when the air flow passes, and at the same time make the filter paper 7 easy to replace.

Embodiment 3

[0032] This embodiment specifically illustrates the method for accurately measuring the concentration of low-concentration dust provided by the present invention. The present invention is based on the principle of charge induction. The specific detection method and its establishment method are as follows:

[0033] A method for accurately measuring the concentration of low-concentration dust, based on a system for accurately measuring the concentration of low-concentration dust, the structure of the system for accurately measuring the concentration of low-concentration dust includes a test channel 2, a charge sensing component 3 extending into the test channel 2 and supporting The airflow driving device, on this basis, the method comprises the following steps,

[0034] ①Improve the test system: the front end of the test channel 2 is connected to the horn-shaped air intake pipe 1, and the rear end is connected to the horn-shaped diffuser pipe 6. For the structure, see figure 1 A...

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Abstract

The invention provides a device and method for accurately measuring the concentration of low-concentration dusts, and belongs to the technical field of charge induction test. The structure of the device for accurately measuring the concentration of low-concentration dusts comprises a test channel, a charge induction assembly stretching into the test channel, and an airflow driver and a processingdisplay which are matched, the front end of the test channel is connected with a trumpet-shaped air inlet tube, the rear end of the test channel is connected with a trumpet-shaped diffusion tube and an airflow driver, and airflow sequentially goes through an air inlet tube, the test channel and the diffusion tube to form the Venturi effect. The detection device has the advantages of simple structure, wide measurement range, high precision of a measurement result especially when the concentration of the dusts is low, and small repetition error. The detection method can highly-efficiently and accurately test the concentration of low-concentration dust airflow, has a high precision, allows the concentration of the dusts to be directly tested through checking meters by establishing an experience database by means of a model, and is widely suitable for every measurement environment.

Description

technical field [0001] The invention relates to the technical field of charge induction testing, in particular to a device and method for accurately measuring the concentration of low-concentration dust. Background technique [0002] Dust refers to solid particles suspended in the air, which has a huge impact on the environment, production safety and human health, especially in the living and working environment of human beings. On the one hand, productive dust is the natural enemy of human health and the main cause of various diseases. The reason, on the other hand, is that dust explosions threaten safe production and people's lives. Accurate detection of dust concentration is a key work related to people's health and smooth work. Dust explosion is mainly caused by discharge. Due to the friction between dust and dust, dust and air, dust and machine wall, static electricity will be generated. When static electricity accumulates to a certain extent, it will cause spark discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 刘丹丹景然汤春瑞沈显庆刘衡梁永波
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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