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Polluting gas component and concentration detection method

A pollution gas and concentration detection technology, which is applied in the direction of measuring devices, diffusion analysis, and analysis materials, etc., can solve the problem of inability to detect multiple gas components at the same time, and achieve the effect of practical method, light weight, and guaranteed accuracy

Active Publication Date: 2019-12-20
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Polluting gas component and concentration detection method
  • Polluting gas component and concentration detection method

Examples

Experimental program
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Effect test

Embodiment 1

[0059] A specific embodiment of the present invention discloses a pollution gas component and concentration detection method, such as figure 1 shown, including the following steps.

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

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

[0062] S3. Analyzing the electrical signal above, and determining the gas concentration of each component type in combination with the previously calibrated detection sensitivity;

[0063] S4. For each component type of gas, according to its gas concentration combined with the gas turbulence diffusion model, the release rate of the pollution source to the gas is obtained, and then output the detection results including all compo...

Embodiment 2

[0067] Improvements are made on the basis of Example 1. The factors affecting the accuracy of the collection results are mainly environmental factors, such as temperature, humidity and electromagnetic interference. By designing the 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 uses the following steps to calibrate the detection sensitivity:

[0069] S01. Pass the clean air without polluting gas into a certain channel of the multi-channel gas acquisition device, and collect the initial voltage V of the main electrode and auxiliary electrode of the output terminal of the single gas sensor in the channel after stabilization 01 , V 02 ;

[0070]...

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 the electrical signal corresponding to the gas concentration of each component type to the ARM processor. The polluted gas contains more than one component type, such as CO, SO 2 , NO, NO 2 Wait.

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

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Abstract

The invention relates to a polluting gas component and concentration detection method, belongs to the technical field of gas concentration detection, and solves the problem that multiple gas components cannot be detected simultaneously in the prior art. The method comprises the steps as follows: multi-channel gas acquisition equipment is arranged and a single gas sensor is arranged in each channel; polluting gas is introduced into the multi-channel gas acquisition equipment, and the single gas sensor of each channel determines the component type of polluting gas and acquires an electric signalcorresponding to concentration of each component type gas; the electric signals are analyzed, and the concentration of each component type gas is determined in combination with preset detection sensitivity; and as for each component type gas, the release speed of a pollution source for the gas is acquired according to gas concentration and a gas turbulent diffusion model, and then, detection results including all component types and gas concentration and release speed of each component type are output. The method is accurate in detection result, stable, reliable and good in extensibility.

Description

technical field [0001] The invention relates to the technical field of gas concentration detection, in particular to a pollution gas component and concentration detection method. Background technique [0002] In the context of global advocacy of ecological and environmental protection, air composition monitoring is an important means of obtaining air quality. Use the air composition monitoring system to obtain the concentration of air pollutants such as CO, SO2, NO, NO2, etc., and provide the data to the environmental and meteorological departments in real time, providing strong data support for air pollution prevention 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 air quality and environmental quality in a certain area. Therefore, there are high requirements on the accuracy, real-time and reliability of its collection. [0004] At present, most ...

Claims

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Application Information

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Patent Type & Authority Applications(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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