Gas-sensitive-gas chromatography information fusion and electronic nose instrument online analysis method

Abstract

The invention provides an electronic nose online analysis method in gas-sensitive-gas chromatography multi-perception information selection, fusion and fermentation/malodor processes. The electronic nose online analysis method is characterized in that: a gas sample injection single period T<0> is 300-600s, the detected gas sample injection time of a gas sensitive sensor array module is asynchronous from the detected gas sample injection time of a capillary gas chromatographic column module, the accumulated sample injection amount of the gas sensitive sensor array module is unequal to the accumulated sample injection amount of the capillary gas chromatographic column module, and the sensing information selection and the analysis time are synchronous; 3 sensing information, namely a steady-state voltage peak value, a peak-appearing time and an area under the curve, is selected by a computer control and analysis module from a single gas sensitive sensor time length 60s response curve, and21 sensing information, namely 10 maximum peak values, 10 retention times and 1 area under the curve, is selected from a time length T<0>-10s semi-separation chromatogram; a modular deep convolutionneural network is utilized by the electronic nose instrument to realize long-term online detection and analysis of 5 fermentation tanks or malodor pollution points with the maximum cycle period of T=5T<0>, including odor type identification, overall odor intensity and main component concentration quantitative prediction.

Description

technical field [0001] The online analysis method of electronic nose instrument combined with gas sensor array and capillary gas chromatographic column of the present invention is oriented to the automatic continuous online detection and analysis requirements of processes such as biological fermentation and environmental odor pollution characterized by long-term dynamic changes of odor, and involves manual labor Intelligence, computer, environmental protection, bioengineering, analytical chemistry and other technical fields mainly solve the problem of insufficient sensitivity of the gas sensor array, the problem of poor selectivity of the gas sensor array caused by a single sensory information extraction method, and the online analysis method of chromatography due to the complete separation of peaks and peaks. The problem of poor performance, the selection and fusion of multi-sensory information of gas sensitivity and gas chromatography, and the long-term cycle online analysis ...

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Problems solved by technology

[0017] The present invention is based on the existing invention patents "A System and Method for Multi-point Centralized Online Monitoring and Analysis of Odor Gas" (see application number: 2018104716131), "On-line Analysis Method for Multi-point Centralized Electronic Nose Instrument for Odor Gas Driven by Big Data" "(Refer to application number: 2018104717083), and "A multi-channel integrated olfactory simulation instrument and online analysis method for biological fermentation process" (refer to application number: 201310405315.X), invented a gas-sensing-gas chromatography multi-sensing Information selection, fusion and electronic nose instrument online analysis methods to solve the long-term online monitoring of multiple biological fermentation processes or multiple odor monitoring points, fermentation and odor pollution types, and online quantification of qualitative indicators of odor intensity and multiple concentration control indicators prediction problem

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