Real-time monitoring method for temperature-controlled slow fermentation process of ice wine based on near infrared spectrum

Abstract

The invention, which belongs to the field of process industrial production and processing, discloses a real-time monitoring method for a temperature-controlled slow fermentation process of ice wine based on near infrared spectrum. The method comprises the following steps: acquiring a near-infrared spectrum data set; preprocessing near-infrared spectrum data; establishing a feature extraction model; establishing a regression monitoring model; and monitoring the temperature-controlled slow fermentation process of ice wine based on a near-infrared spectrum in real time. According to the method, amachine learning feature extraction and regression monitoring model is utilized, and a microscopic monitoring technology and a data analysis algorithm are organically combined and fused into the icewine brewing process, so that the monitoring on the sugar degree and the alcohol potential in the temperature-controlled slow fermentation link can directly reflect the microscopic trend of the ice wine.

Description

technical field [0001] The invention relates to a method for real-time monitoring of the temperature-controlled slow fermentation process of ice wine based on near-infrared spectroscopy, which belongs to the field of process industry production and processing. Background technique [0002] Ice wine, also known as ice wine, first appeared in Franconia, Germany in 1794. The definition of ice wine in the "Technical Specifications for Grape Winemaking in China" is: to delay the harvesting of grapes, and when the temperature is below -7°C, the grapes will be harvested. Keep it on the branches for a certain period of time to freeze, then harvest the grapes, press them into grape juice, and use the grape juice to make wine. [0003] Generally, the ice wine brewing process includes: picking, sorting, pressing frozen grapes to obtain concentrated grape juice, adding to containers, sterilizing the concentrated grape juice, slow fermentation at temperature control, secondary filtration...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems in the prior art that the near-infrared spectrum data processing is difficult, the complexity of the monitoring model will be increased during modeling, and the monitoring model is difficult to establish correctly; the present invention provides a slow fermentation process of ice wine based on near-infrared spectrum temperature control A real-time monitoring method, the method comprising:

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