A 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 includes: vibrating the liquid to be measured by a vibration sensor, so that the surface of the liquid generates surface capillary waves under the action of surface tension; using a combination of light sources to emit a variety of visible lights of different colors, and irradiating the liquid surface; receiving light reflected by the capillary waves on the liquid surface Visible light: For the intensity change data of the received visible light, analyze the frequency deviation relationship of the reflected light to obtain the wavelength of the capillary wave on the liquid surface, and then use the wavelength of the surface capillary wave to calculate the surface tension of the liquid; for the received visible light, analyze the different The light intensity absorbed by the liquid under the visible light of the color can be used to obtain the color of the liquid, and then the type of liquid and the microbial content in the liquid can be obtained by combining the color and surface tension. The invention can realize higher precision and low cost liquid deterioration monitoring.

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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