Mixed gas component concentration identification method and system

Abstract

The embodiments of the invention provide a mixed gas component concentration identification method and system, and belongs to the technical field of multi-component gas sensing. The mixed gas component concentration identification method includes the following steps: obtaining a detection response value of a gas sensor for a target gas component in mixed gas and determining a guess concentration value based on the detection response value; executing Newton iterative calculation based on the guess concentration value and a Newton iterative calculation method and determining corresponding iterative concentration values in order for iterative calculation; determining change amount in the concentration values before and after each iterative calculation and stopping the iterative calculation when the change amount is less than a preset concentration threshold; and determining the concentration of the target gas component according to the iterative concentration value determined by the lastiterative calculation. Combined the Newton iterative calculation method and detection response prediction technology, the mixed gas component concentration identification method and system reduce thelimitation of linear concentration response of the gas sensor to the detection of the component concentration of the actual mixed gas and ensure the high accuracy of gas component concentration detection.

Description

technical field [0001] The invention relates to the technical field of multi-component gas sensing, in particular to a method and system for identifying the component concentration of a mixed gas. Background technique [0002] With the development of "human-computer interaction" intelligent detection technology in virtual environment, multi-component gas sensor, as a functional device for the collection, conversion, transmission and processing of olfactory extension information, has become a It is an indispensable technical tool in the fields of risk warning, analysis and detection. [0003] The multi-component sensor array can simultaneously extract the response signals of multiple gas components (that is, components) of the mixed gas on multiple sensors, and analyze the difference by analyzing the algorithm to obtain the response of multiple gas components at the same time, by This use of cross-sensing can turn the interfering signal in a single gas sensor into a useful s...

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Problems solved by technology

[0005] However, the inventors of the present application have found in the process of practicing the present application that there are at least the following defects in the related art: although the gas sensor has a linear response relationship between the response signal and the gas concentration within a limited concentration range, it is not suitable for most gas sensors. The signal response of the component and the large concentration range is not linear, so that there is a certain deviation in the nonlinear response of the actual gas sensitivity response curve, especially in the process of identifying the mixed gas, the difference of the nonlinear response is more obvious. as obvious

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