Liquid deterioration monitoring method and system based on visible light

Abstract

The invention discloses a liquid deterioration monitoring method and system based on visible light. The method comprises the following steps: vibrating to-be-detected liquid through a vibration sensor, so that surface capillary waves are generated on the surface of the liquid under the action of surface tension; using a light source combination to emit visible light with various different colors to irradiate the surface of liquid; receiving visible light reflected by capillary waves on the surface of the liquid; for the received light intensity change data of the visible light, analyzing the frequency offset relationship of the reflected light to obtain the wavelength of the capillary wave on the surface of the liquid, and further calculating the surface tension of the liquid by utilizing the wavelength of the capillary wave on the surface; for the received visible light, obtaining the color of the liquid by analyzing the light intensity absorbed by the liquid under the visible light with different colors, and then obtaining the type of the liquid and the content condition of microorganisms in the liquid by integrating the color and the surface tension. According to the invention, liquid deterioration monitoring with higher precision and low cost can be realized.

Description

technical field [0001] The invention relates to the technical field of liquid quality monitoring, and more specifically, to a method and system for monitoring liquid deterioration based on visible light. Background technique [0002] Nowadays, people pay attention to food safety, and there are more and more demands for analyzing food quality. However, in industrial production, there is no method to monitor whether the liquid has deteriorated in real time (such as the deterioration monitoring of the yogurt brewing process and the alcohol fermentation process), Because most of the current testing equipment are invasive or expensive equipment, consumers can usually only judge whether the liquid has deteriorated through the production date marked on the food, so the basis for detecting the change of microbial content during the process of liquid deterioration In practice, it is of great significance to make a cheap and accurate liquid deterioration monitor, which has gradually b...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, people pay attention to food safety, and there are more and more demands for analyzing food quality. However, in industrial production, there is no method to monitor whether the liquid has deteriorated in real time (such as the deterioration monitoring of the yogurt brewing process and the alcohol fermentation process), Because most of the current testing equipment are invasive or expensive equipment, consumers can usually only judge whether the liquid has deteriorated through the production date marked on the food, so the basis for detecting the change of microbial content during the process of liquid deterioration In terms of research, it is of great significance to make a cheap and accurate liquid deterioration monitor, which has gradually become a hot topic of research.

[0003] At present, there are several types of liquid deterioration detection used in industry. The first is to use intrusive equipment, such as a pH meter, because many bacteria found in the liquid will produce lactic acid as a by-product, and lactic acid will cause the pH value to drop, but the use of a pH meter requires timing. Open the liquid container to test the pH value of the liquid; the second is to use ATP (adenosine triphosphate) bioluminescence method, ATP bioluminescence technology measures the light emission produced by the enzymatic reaction between luciferin and luciferase, and the reaction process is measured with a photometer The amount of light emitted in is proportional to the concentration of ATP, and therefore also proportional to the number of microorganisms in the sample, but this method requires complex operations and expensive equipment; the third is electronic nose technology, electronic nose is a method for An analytical device that quickly detects and identifies odor mixtures, it mimics the operating principle of the human sense of smell, however the accuracy of the electronic nose depends on the price of other sensors, usually at a higher cost

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