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A method for monitoring gas species and concentration using an array gas sensor

A gas sensor and gas sensing technology, used in instruments, measuring devices, scientific instruments, etc., can solve the problem of inability to detect gas types and concentrations in real time, and achieve the effects of reducing test costs, improving detection speed, and wide application range.

Active Publication Date: 2022-04-08
江苏智闻智能传感科技有限公司
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Problems solved by technology

[0006] An object of the present invention is to solve the technical problem that the gas type and concentration cannot be detected in real time in the prior art

Method used

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  • A method for monitoring gas species and concentration using an array gas sensor
  • A method for monitoring gas species and concentration using an array gas sensor

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Embodiment Construction

[0041] The array gas sensor in the embodiment of the present invention may be composed of a plurality of gas sensing elements arranged in an array, and the plurality of gas sensing elements include multifunctional sensing elements that respond to various gases, The gas has a plurality of single sensing elements responsive, each single sensing element has a different response value at different concentration values ​​of the corresponding gas. The sensitivity of a single sensing element is greater than that of a multi-functional sensing element. Each gas sensing unit can be a separate gas sensor, that is, each gas sensor has a substrate. The array gas sensor is preferably a microstructure, that is, a plurality of gas sensing elements constituting the array gas sensor share a substrate, the gas sensing element may include a sensitive layer and an electrode, the sensitive layer is formed on the shared substrate, and the electrode consists of a sensitive layer lead out. For the s...

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Abstract

The invention provides a method for monitoring gas types and concentrations by using an array gas sensor. The method includes the following steps: collecting the resistance value of the array gas sensor in real time, and calculating the resistance change rate of the multifunctional sensing element within a preset period of time in real time; predicting whether there is a target gas in the current air; if predicting that there is no target gas , then it is judged whether there are m-x resistance change rates among the m resistance change rates of the continuous multifunctional sensing element greater than the first resistance change rate threshold θ r1 , if there is, it is determined that there is a target gas in the current air; extract the relevant features detected by the array gas sensor and the resistance value, and form a feature vector; use a classifier to identify the feature vector, thereby identifying the type of target gas; The type of the target gas is used to calculate the first response value of the target single sensing element that responds to the target gas at the moment; the concentration value of the target gas is calculated according to the response value-concentration formula and the first response value.

Description

technical field [0001] The invention relates to the technical field of gas concentration detection, in particular to a method for monitoring gas types and concentrations by using an array gas sensor. Background technique [0002] The gas sensor is to convert the information related to the gas type and concentration into changes in electrical signals. According to the changes in these electrical signals, the qualitative and quantitative identification and judgment of the gas to be measured in the environment can be achieved, so that real-time detection of specific gases, Monitoring and alarming. [0003] The method of qualitative and quantitative testing of gas by traditional array gas sensors is to first form a pattern for each gas, identify the category of the detected sample according to the characteristics of the detected gas, and then form each concentration of each gas A model that predicts the concentration of a detected sample based on the characteristics of the dete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/12G01N27/128
Inventor 蔡晓娟鲁一江孙旭辉史志存张永超王龙辉张蕴哲
Owner 江苏智闻智能传感科技有限公司
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