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Food quality testing system and method based on laser ultrasound erosion mechanism

A laser ultrasonic and quality inspection technology, applied in the generation of ultrasonic/sonic/infrasonic waves, etc., can solve problems affecting the health of workers, harsh testing environment, long testing time, etc., to achieve easy real-time online testing, without manual intervention, The effect of increasing excitation efficiency

Inactive Publication Date: 2011-09-07
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a grain quality detection system and method based on the laser ultrasonic ablation mechanism to solve the problems of long detection time, high cost, environmental pollution, affecting the health of staff, and harsh detection environment in the existing grain detection. question

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  • Food quality testing system and method based on laser ultrasound erosion mechanism
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  • Food quality testing system and method based on laser ultrasound erosion mechanism

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Embodiment Construction

[0033] Such as figure 1 As shown, the food quality detection system based on the laser ultrasonic ablation mechanism of the present invention includes a laser 1, a beam splitter 2, an attenuation sheet 3, a lens 4, a photodiode 5, an amplifier 6, a computer 8 and an ultrasonic detector 7, and the ultrasonic detector The output end of device 7 is connected to the input end of amplifier 7, the output of amplifier 7 is connected to the input end of computer 7, amplifier 7, photodiode 5 are wired with computer 8 respectively, beam splitter 2, attenuation plate 3 and lens 4 are followed by Set on the optical axis of the laser 1, the beam splitter 2 is set horizontally, the optical axis of the beam emitted by the laser 1 and the beam splitter 2 form an incident angle of 45°, the attenuation sheet 3 and the lens 4 are perpendicular to the optical axis of the laser 1, and the photodiode 5 is placed on the optical axis of the light beam reflected by the beam splitter 2, and the photodi...

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Abstract

The invention relates to a food quality testing system and method based on a laser ultrasound erosion mechanism; in the invention, a pulsed laser is used as a laser source and a capacitance ultrasound transducer is used as a receiving element, so as to build a testing platform for obtaining ultrasound longitudinal signals of food grains; the time-frequency characteristic parameters of the signalsare extracted by utilizing a wavelet packet transforming technology; a mathematical model of the food quality parameters is built based on the least square method; and the classification and evaluation of food quality are finally realized according to the national standards. The system and method related by the invention have the advantages of fast testing, accuracy, no damage, no contact, strongcapacity for resisting interference, high efficiency, no pollution and the like.

Description

technical field [0001] The invention relates to an online grain quality detection system and method, in particular to a grain quality detection system and method based on a laser ultrasonic ablation mechanism, belonging to the technical field of grain quality detection. Background technique [0002] The production, trade and utilization of grain are based on the quality of grain. In the process of grain production, grain quality is an important goal of breeding and guiding planting; in the process of purchasing, grain quality is the basis for price determination; in the process of grain storage, with the prolongation of storage time, the quality of grain will greatly change Grain quality is the most important indicator to guide the reasonable rotation of national grain reserves. Changes in grain quality must be constantly monitored to avoid causing major losses to the country and endangering national food security; in the process of grain processing and trade, grain quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34
Inventor 樊超杨红卫傅洪亮杨铁军张德贤梁义涛朱春华靳婷张建华
Owner HENAN UNIVERSITY OF TECHNOLOGY
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