Non-contact milk freshness detection system and detection method thereof

Abstract

The invention relates to a non-contact milk freshness detection system and a detection method thereof, belongs to the technical field of milk freshness detection, and aims at providing a hardware structure of the non-contact milk freshness detection system and improving a detection method thereof. The system comprises a microprocessor for data collecting and processing, the microprocessor is connected with an external information interaction device including a keyboard and a display screen concretely, a peripheral circuit of the microprocessor is connected with a clock control chip and a temperature sensor, the signal output end of the microprocessor is connected with a data storage module and a data communication module, the data communication module includes a GPRS wireless communicationmodule concretely, the GPRS wireless communication module establishes connection with a host computer via the wireless network, and the display screen for displaying freshness data of milk is arranged outside the host computer; and software for training collection data is arranged in the host computer. Thus, the milk freshness is detected.

Description

technical field [0001] The invention discloses a non-contact milk freshness detection device and a detection method thereof, belonging to the technical field of milk freshness detection. Background technique [0002] With the improvement of the quality of life, people pay more and more attention to cultivating daily eating habits with balanced nutrition. As an indispensable nutritional supplement in daily life, milk is rich in fat, sugar, vitamins and trace elements, which are beneficial to human health. Beneficial ingredients. Generally, people will judge the freshness of milk by observing the production date and shelf life. However, apart from their own information judgment, there will be uncertain factors in the process of transportation or storage of milk, such as packaging damage during transportation, storage environment temperature, etc. If the humidity is not up to the standard, etc., it will affect the current freshness of the milk. The milk that is not up to the st...

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Problems solved by technology

[0004] Among them, the chemical analysis method uses the pH value as the milk quality detection index. The pH value of the fresh milk of the reference comparison sample is about 6.7. It is determined whether the milk quality is up to standard by measuring the pH value of the corresponding sample. This method has high measurement accuracy and high efficiency, but the detection The milk packaging will be damaged during the process, and the contact measurement is carried out, and the process is relatively complicated, and many reagents are used, so real-time detection cannot be achieved;

[0005] The microbial quantity measurement method is mainly based on the continuous change of the microbial quantity in the milk during the spoilage process to judge the milk quality. Although this method can be used for stable detection, the sampling, observation and counting process is cumbersome and takes too long, and it cannot be used to accurately determine the milk quality. real-time detection;

[0006] Infrared spectroscopy is used to detect the internal composition of substances, so as to judge the quality of milk. The advantages of this method are fast speed, high efficiency, good repeatability, and convenient non-contact measurement. , In particular, it is necessary to establish a complex optical path, which has high requirements for data processing;

[0007] The measuring instrument used in the ultrasonic testing method is simple in design, low in cost, easy to operate, and has the advantages of real-time monitoring and non-destructive measurement. However, in the process of milk testing, milk components can only be analyzed by detecting the ultrasonic velocity and its energy attenuation. However, the composition of milk is complex and changing all the time. At the same time, the test results are greatly disturbed by surrounding environmental factors, the measurement error is high, and the adaptability is poor. Therefore, this method is not suitable for the detection of milk freshness.

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