Device and method for detecting quality of liquid dairy products with near infrared transmittance technique

Abstract

The invention relates to a device and a method for detecting quality of liquid dairy products with a near infrared transmittance technique. The device comprises a light source system, a sample chamber, an optical splitting system, a data transmission line, a computer and a display device. The method comprises steps as follows: original optical information of a sample is acquired by the light source system, the sample chamber and the optical splitting system; original spectral data is subjected to pre-processing including data smoothing and filtering, a filtered signal is subjected to characteristic extraction, a characteristic value obtained through extraction is normalized, the normalized characteristic value is subjected to dimension reduction through principal component analysis, and a predication and classification model is established according to characteristic value data of the extracted sample; by means of the obtained model, quantitative determination and category classification for content of fat, protein and lactose in a new liquid dairy product sample are realized. The near infrared spectroscopic analysis has the advantages of being pollution-free, high in measurement speed, accurate, low in cost and the like. Great convenience is brought to quality detection work of the dairy products.

Description

technical field [0001] The invention relates to the fields of machine learning, pattern recognition, near-infrared technology and quality inspection, in particular to a device and method for quality inspection of liquid dairy products based on near-infrared transmission technology. Background technique [0002] Effective nutrients in dairy products include protein, fat, lactose and other nutrients, and the content of nutrients directly affects the quality of dairy products. At present, the methods for quality inspection of dairy products mainly include chemical detection methods and physical methods. The traditional chemical evaluation method is time-consuming, cumbersome to operate, and poor in real-time performance, while the physical method is expensive and requires high technical requirements, so it is difficult to be widely used. It is an urgent need for the dairy industry to research and develop a real-time, non-destructive and low-cost dairy product detection system....

AI Technical Summary

Problems solved by technology

However, the following problems restrict the application of near-infrared spectroscopy detection technology in dairy product detection: 1) Dairy product detection requires rapid detection on the production line

Traditional near-infrared spectrometers have weak light absorption and low spectral signal-to-noise ratio, making it difficult to form accurate judgments quickly; 2) Due to multi-substance components and environmental interference, the spectrum is complex and difficult to analyze

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