A kind of pollution gas composition and concentration detection method

A technology for the detection of polluted gases and concentrations, which can be used in measurement devices, diffusion analysis, analysis materials, etc., and can solve the problem of inability to detect multiple gas components simultaneously

Active Publication Date: 2022-08-02
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a pollution gas composition and concentration detection method to solve the problem that the existing technology cannot detect multiple gas components at the same time

Method used

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  • A kind of pollution gas composition and concentration detection method
  • A kind of pollution gas composition and concentration detection method
  • A kind of pollution gas composition and concentration detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A specific embodiment of the present invention discloses a method for detecting the composition and concentration of polluted gas, such as figure 1 shown, including the following steps.

[0060] S1. Arrange multi-channel gas acquisition equipment, and set up a single gas sensor in each channel;

[0061] S2. Introduce polluted gas into the multi-channel gas collection device, determine the component type of the polluted gas by a single gas sensor in each channel, and obtain an electrical signal corresponding to the gas concentration of each component type;

[0062] S3. Analyze the above-mentioned electrical signal, and determine the gas concentration of each component type in combination with the pre-calibrated detection sensitivity;

[0063] S4. For each component type of gas, according to its gas concentration combined with the gas turbulent diffusion model, obtain the release rate of the pollution source to the gas, and then output the detection result including all ...

Embodiment 2

[0067] Improvements are made on the basis of Example 1, and the factors affecting the accuracy of the collection results are mainly environmental factors, such as temperature, humidity and electromagnetic interference. By designing a signal conditioning circuit with the same connection structure of the main electrode and the auxiliary electrode, the influence of the circuit structure on the detection sensitivity is actually eliminated. Furthermore, the influence of environmental factors on the detection sensitivity can be eliminated by making a difference between the two outputs.

[0068] Preferably, the method adopts the following steps to calibrate the detection sensitivity:

[0069] S01. Pass clean air that does not contain polluted gas into a certain channel of the multi-channel gas collection device, and collect the initial voltage V of the main electrode and auxiliary electrode at the output end of a single gas sensor in the channel after stabilization. 01 , V 02 ;

...

Embodiment 3

[0097] The present invention also provides an integrated multi-channel pollution gas concentration detection device using the method described in Embodiment 1, such as figure 2 As shown, it includes a multi-channel gas acquisition device and an ARM processor connected in sequence.

[0098] The multi-channel gas collection device is used to collect the incoming polluted gas, determine the component types of the polluted gas, and send an electrical signal corresponding to the gas concentration of each component type to the ARM processor. The polluted gas contains more than one component species, such as CO, SO 2 , NO, NO 2 Wait.

[0099]The ARM processor is used to analyze the above-mentioned electrical signal, and determine the gas concentration of each component type in combination with the pre-calibrated detection sensitivity, and then obtain the release rate of the pollution source to each component type gas according to the gas turbulent diffusion model, and then All co...

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Abstract

The invention relates to a polluted gas component and a concentration detection method, belongs to the technical field of gas concentration detection, and solves the problem that the prior art cannot detect multiple gas components simultaneously. The method includes the following steps: arranging multi-channel gas collection equipment, and arranging a single gas sensor in each channel; introducing polluted gas into the multi-channel gas acquisition equipment, and determining the concentration of the polluted gas by the single gas sensor of each channel. component type, and obtain the electrical signal corresponding to the gas concentration of each component type; analyze the above-mentioned electrical signal, and determine the gas concentration of each component type in combination with the pre-calibrated detection sensitivity; for each component type gas, according to its gas concentration Combined with the gas turbulent diffusion model, the release rate of the pollution source to the gas is obtained, and then the detection results including all the component types, the gas concentration and release rate of each component type are output. The detection results of this method are accurate, stable, reliable and have good scalability.

Description

technical field [0001] The invention relates to the technical field of gas concentration detection, in particular to a pollution gas component and a concentration detection method. Background technique [0002] In the context of global advocacy of ecology and environmental protection, air composition monitoring is an important means to obtain air quality. The air composition monitoring system is used to obtain the gas concentrations of polluting gases such as CO, SO2, NO, NO2, etc. in the air, and provide the data to the environment, meteorology and other departments in real time, providing strong data support for the prevention of air pollution and ecological protection. [0003] As an important part of the air composition monitoring system, the polluted gas collection device is directly related to the evaluation of the air quality and environmental quality of a certain area. Therefore, it has higher requirements on the accuracy, real-time and reliability of its collection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N13/00G01N27/27
CPCG01N33/0022G01N33/0031G01N27/27G01N13/00G01N2013/003
Inventor 石增辉王超然马俊
Owner BEIJING MECHANICAL EQUIP INST
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