Quantitative detection method of moisture distribution uniformity in solid-state fermentation by hyperspectral image technology

Abstract

The invention relates to a method for quantitatively detecting solid fermentation moisture distribution uniformity through the hyper-spectral image technology, and belongs to the technical field of food and agricultural product fermentation relative parameter detection. Firstly, a hyper-spectral image of multiple fermentation substrates under a certain waveband is collected; image information of a region-of-interest is extracted, and fixed wavelength points and corresponding spectrum data in the waveband are selected; n characteristic wavelengths are screened; a prediction model relation expression of moisture content is built according to spectrum reflection values under the characteristic wavelengths and moisture content measured values of all the fermentation substrates; by means of the built relation expression, the moisture content corresponding to each pixel point in the spectral image of the fermentation substrates is detected, and a two-dimensional distribution graph of the moisture content is drawn; the variance value of moisture distribution is calculated; the moisture distribution uniformity of the fermentation substrate is detected according to the variance value of moisture distribution. The method reduces detection cost, increases detection speed, is suitable for online monitoring, and quickly and quantitatively detects moisture distribution uniformity of the fermentation substrate.

Description

technical field [0001] The invention relates to a detection technology for the uniformity of moisture distribution in solid-state fermentation substrates, in particular to a method for quantitatively detecting the uniformity of moisture distribution in solid-state fermentation using hyperspectral image technology, and belongs to the technical field of detection of related parameters of food and agricultural product fermentation. Background technique [0002] Water is the main component of microbial cells and one of the basic conditions for microbial life activities. In solid-state fermentation production, microorganisms must absorb water from the fermentation substrate, so too high or too low moisture in the solid-state fermentation substrate will have adverse effects on solid-state fermentation. If the moisture content of the fermentation substrate is too low, the microorganisms cannot grow, resulting in prolonged fermentation period or a decrease in the quality of the ferm...

AI Technical Summary

Problems solved by technology

[0003] At present, in the actual production process, experienced operators usually judge the uniformity of the moisture distribution of the matrix by visual observation or hand touch. This method can only use descriptive language to qualitatively detect the uniformity of moisture distribution, and Detection accuracy is easily affected by factors such as worker experience and physical condition

The conventional moisture content detection method is the offline drying and weighing method based on the national standard GB / T5009.3.2010. The offline drying and weighing method is cumbersome to operate, time-consuming and laborious, and can only detect the average moisture content of the sample to be tested.

Therefore, none of the above methods can achieve a quantitative description of the moisture uniformity of the fermentation substrate.

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