High-precision ultrasonic liquid difference identification device for food safety

Abstract

The invention discloses a high-precision ultrasonic liquid difference identification device for food safety. The identification device comprises two detachable ultrasonic sending and receiving sensors, a signal processing chip, a display screen and a key. The signal processing chip comprises a frequency and power adjustable sending circuit, a receiving circuit which can perform noise reduction, amplification, oversampling and filtering, a sigma-delta AD modulator, an adjustable digital filter circuit, a high-speed memory and a memory access interface thereof, a wireless sending module, a microprocessor and a crystal oscillator. Through use of the identification device, when ultrasonic waves pass through liquids, high-precision extraction of signals can be performed, through comparison of the signal characteristic values corresponding different substances, differences among the substances can be distinguished, and in food safety, fake and poor quality liquid food can be effectively distinguished. At the same time, although a plurality of high-precision signal processing circuits are integrated on one single chip, the chip area is small, so that the identification device is small in volume and portable, and is suitable for personals and families.

Description

【Technical field】 [0001] The present invention relates to the fields of integrated circuit design technology, ultrasonic sensor application technology and food safety detection, and specifically relates to a high-precision ultrasonic liquid difference recognition instrument applied to food safety, combined with ultrasonic sensor technology, and realizes high-precision signal processing through integrated circuit design Thus, the authenticity of liquid food can be distinguished. 【Background technique】 [0002] In recent years, my country's food safety incidents have occurred frequently, which is shocking. Since food safety testing mainly uses biochemical analysis and spectral analysis methods, the process is complex and the equipment is huge, it needs to be carried out in a specific laboratory, and it is mainly supervised by relevant government departments. However, our country has a large population and a huge daily food consumption. The government cannot implement comprehe...

AI Technical Summary

Problems solved by technology

Due to its low energy, weak ultrasonic waves have the advantages of non-destructive, non-invasive, no need to prepare samples, and rapid detection. At present, they are mainly used in the detection of fat content in dairy products, the detection of sugar, and the detection of hydrocarbon mixtures in food products. Specific The detection of a certain ingredient has not appeared in the application of food comprehensive quality detection

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