Multi-probe rapid photoacoustic detection apparatus for detecting components and contents of food additives and detecting method

Abstract

The invention discloses a multi-probe rapid photoacoustic detection apparatus for detecting components and contents of food additives and a detecting method. The detection apparatus includes a light source radiating unit, a detecting room unit, a multi-probe detection unit, a signal processing unit, a control unit and a display unit, wherein the light source radiating unit is positioned at the bottom of the detecting room unit; the input end of the detecting room unit is connected with the output end of the light source radiating unit; the input end of the multi-probe detection unit is connected with the detecting room unit; the input end of the signal processing unit is connected with the output end of the multi-probe detection unit; the input end of the control unit is connected with the output end of the signal processing unit; the input end of the display unit is connected with the output end of the control unit. According to the invention, the light-induced ultrasound technology, the multi-ultrasonic-probe detection method and the data parallel processing technology are adopted, and a cross-correlation algorithm is used to obtain characteristic photoacoustic signals of the food additives, so that the detection accuracy is greatly improved, the detection range is wider, and the practicability is higher.

Description

technical field [0001] The invention relates to a food quality detection device, in particular to a multi-probe rapid photoacoustic detection device and method for the composition and content of food additives. Background technique [0002] Food is the most important thing for the people, and food quality and safety is the top priority of the national economy and the people's livelihood and people's life and health. In our daily life, we frequently come into contact with and eat a variety of foods, many of which need to add some additives to the food in order to increase the taste and flavor, such as: lactic acid, vitamin C and spices. [0003] Internationally, many countries, including China, have very strict requirements and index control on food additives and their ingredient content. The manufacturers of related food production need to comply with national food safety standards for production, and there are also The purpose of the supervision and inspection by relevant ...

AI Technical Summary

Problems solved by technology

Although there have been patent reports on photoacoustic detection of food additive components, such as: Chinese Patent Application No. 201320594523.4 discloses a photoacoustic device for quickly detecting additives in liquid food, but because one detection can only be performed on a certain additive composition and content It is impossible to detect the composition and content of multiple additives at the same time; and the ultrasonic detector is easily interfered by the forward incident light, and the detection accuracy, stability and repeatability need to be improved

In addition, although photoacoustic technology has been applied to the detection of liquid components, such as: [Zhong Ren, Guodong Liu, Zhen Huang. Investigation of Glucose Concentration Measurement based on Tunable Pulsed Laser induced Photoacoustic technique. Chinese Optics Letters, S21701, 2013 ], but because a single ultrasonic detector is used to collect the photoacoustic signal, and the forward detection mode, the photoacoustic signal of the tested sample is easily interfered by the forward incident light source, which affects the detection accuracy and stability

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