Air-quality monitoring system based on electronic nose technique, and monitoring method thereof

Abstract

The invention discloses an air-quality monitoring system based on electronic nose technique, and a monitoring method thereof. The system is characterized by being provided with a sensor signal conditioning circuit, wherein a quality detection input end group of the sensor signal conditioning circuit is connected to a gas sensor group; the output end of the sensor signal conditioning circuit is connected to a sensor array signal preprocessor; the output end of the sensor array signal preprocessor is connected to a central processing unit; and a display end of the central processing unit is connected to a display. The system has the advantages that the discreteness problem of a metallic oxide sensor and the mutual interference problem of various gases are better solved by utilizing a virtual resistance method and a specific algorithm provided by the invention, thereby greatly promoting the output precision of the system, being capable of calculating the concentration values of differentoutputted gases, and determining the type of the gases, and simultaneously finishing the qualitative and quantitative identification of gases, and one output of an artificial neural network represents one gas.

Description

technical field [0001] The invention relates to an air sensor monitoring technology, specifically, an air quality monitoring system based on electronic nose technology and a monitoring method thereof Background technique [0002] Traditional air quality electronic noses based on semiconductor metal oxide sensor arrays often only perform qualitative identification or grade identification of odor concentration, which affects the practical application of electronic noses. Even if it has the ability of qualitative and quantitative recognition, it is realized by connecting two neural networks in series: first use one network for qualitative recognition and then use another network for quantitative recognition. This makes the electronic nose have disadvantages such as poor practicability, high algorithm complexity, poor anti-interference ability, poor precision, and slow operation speed. [0003] Due to the discrete nature of metal oxide sensors encountered in the mass production...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an air quality monitoring system based on electronic nose technology and a monitoring method thereof, which can identify different response values ​​of sensors in different environments and measured gas concentrations, and can solve the problem of mutual interference of various gases

At the same time, a virtual resistance method is proposed to solve the problem of sensor discreteness in mass production of electronic noses

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