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Method for evaluating sweet potato quality on basis of vibration sound signal

A technology for sound signal and quality evaluation, which is applied in the processing of detection response signals, measurement devices, and analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve problems such as labor and time-consuming

Active Publication Date: 2019-01-04
JILIN INST OF CHEM TECH
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  • Abstract
  • Description
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Problems solved by technology

At present, the quality detection and grading of sweet potatoes mostly use sampling methods, which are time-consuming and labor-intensive.

Method used

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  • Method for evaluating sweet potato quality on basis of vibration sound signal
  • Method for evaluating sweet potato quality on basis of vibration sound signal
  • Method for evaluating sweet potato quality on basis of vibration sound signal

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Experimental program
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Effect test

experiment example

[0042] Main experimental reagents and materials: amylose standard sample (Sigma), amylopectin standard sample (Sigma), absolute ethanol, 1mol / L KOH solution, 0.1mol / L dilute hydrochloric acid solution, iodine reagent (2.0g potassium iodide, 0.2 g iodine, distilled water to constant volume 100mL), collected from a fresh sweet potato from a supermarket in Jilin whose origin is Liaoning.

[0043] experimental method

[0044] Sound signal acquisition

[0045] (1) Acquisition of sound signals of sweet potatoes: Use steel balls to hit different parts of sweet potatoes, and then use a high-sensitivity microphone (Audio Technica AT9934USB) to connect to a computer for sound collection.

[0046] (2) Preprocessing of the sound signal: use MATLAB programming, and use Cool Edit software to denoise the collected sound signal to obtain the real sweet potato vibration sound signal.

[0047] (3) Extraction of sound signal eigenvalues: (1) Time-domain eigenvalues: Using the algorithm of time...

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Abstract

The invention discloses a method for evaluating sweet potato quality on the basis of a vibration sound signal. A sweet potato moisture model is as shown in the specification; a sweet potato total sugar model is as shown in the specification; a sweet potato amylose model is as shown in the specification; and a sweet potato amylopectin model is as shown in the specification. The method evaluates thesweet potato quality through a multivariable linear regression model established by a time frequency characteristic value of the vibration sound signal, and a novel method is provided for a food quality evaluation means.

Description

technical field [0001] The invention relates to the field of non-destructive testing of agricultural products, in particular to a method for evaluating the quality of sweet potatoes based on vibration and sound signals. Background technique [0002] The quality index of agricultural products is the main reference to reflect its quality level. At present, in the field of agricultural product circulation, traditional chemical methods are mostly used to detect and grade the quality indicators of agricultural products such as moisture, starch, pectin, and total sugar, which is time-consuming, laborious, and costly. In recent years, some non-destructive product testing technologies have also appeared, such as infrared spectroscopy, X-ray, nuclear magnetic resonance testing, acoustic technology testing methods, etc., but most of them are due to cumbersome operations, expensive instruments, high maintenance costs, and inconvenient carrying. , it is difficult to realize the quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/44G01N29/48
CPCG01N29/045G01N29/4418G01N29/48
Inventor 刘洋周鸿立罗印斌蔡艳丽崔东琦
Owner JILIN INST OF CHEM TECH
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