Straw solid-state fermentation process parameter soft measurement method and device based on near infrared spectrum
A technology of near-infrared spectroscopy and near-infrared spectroscopy, which is applied in the field of solid-state fermentation process control, can solve the problems of cumbersome steps, long detection time and high detection cost, and achieves the effects of simple and convenient operation, fast detection speed and good reproducibility
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[0013] In the present invention, firstly, the near-infrared spectrum data of the solid-state fermentation process product of straw is obtained by using a diffuse-reflection near-infrared spectrum acquisition device, and the collected spectrum signal is analyzed and converted by a near-infrared spectrometer and then transmitted to a computer through a data line; then, the obtained original spectrum The data were preprocessed, and principal component analysis was used to extract principal component characteristic variables from these spectral information, and these characteristic vectors were correlated with the measured reference values (determined by conventional physical and chemical analysis methods) of product parameters in the straw solid-state fermentation process. The soft-sensing model of the product parameter index in the fermentation process was established by partial least squares method. For the unknown sample to be tested, through the corresponding spectral data c...
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