Method for identifying unfrozen meat and fresh meat based on impedance spectrum

An identification method and impedance spectrum technology, applied in the direction of material impedance, etc., can solve problems such as complex methods, inability to meet on-site testing requirements, and low accuracy.

Inactive Publication Date: 2011-01-19
CHINA AGRI UNIV
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Problems solved by technology

[0003] In the existing technology, the identification of frozen meat is mostly based on methods such as enzymology, DNA, nuclear magnetic resonance, an

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  • Method for identifying unfrozen meat and fresh meat based on impedance spectrum
  • Method for identifying unfrozen meat and fresh meat based on impedance spectrum
  • Method for identifying unfrozen meat and fresh meat based on impedance spectrum

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Embodiment Construction

[0050] In order to make the purpose, content, and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] Such as figure 2 As shown, the embodiment of the present invention provides a device for identifying thawed meat and fresh meat based on impedance spectroscopy, which mainly includes:

[0052] The central processing unit 201 is used to set the scan start frequency and scan end frequency of the output signal, the frequency change incremental value, the duration of the signal at each frequency, and the interval between adjacent frequency signals, and start the sinusoidal signal generation According to the above settings, the unit generates multiple continuous sine wave signals with different frequencies and the mean value of the amplitude is 0; it is also used to calculate the phase difference and impedance value corresponding to each fr...

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Abstract

The invention discloses a method for identifying unfrozen meat and fresh meat based on an impedance spectrum. The method comprises the following steps of: 1, generating a plurality of continuous sine wave signals with different frequencies and mean amplitude of zero and loading the sine wave signals on a raw meat sample; 2, including the raw meat sample and a resistor R1 with fixed nominal value on a branch circuit through which the sine wave signals flow, and detecting voltage division values of impedance and the resistor R1; 3, converting the ratio of the voltage division values into a voltage form and then into a digital signal, calculating the impedance of each frequency fi according to the resistor R1 and the digital signal, and representing the change of the impedance along with thefrequency fi as a curve to obtain the impedance spectrum; 4, detecting phase difference between a plurality of sine wave signals generated in the step 1 and the signal passing through the raw meat sample to be measured, converting the phase difference into voltage output and then into a digital signal, and representing the change of the phase difference along with the frequency fi as a curve to obtain phase spectrum; and 5, identifying the unfrozen meat according to the impedance spectrum and a phase spectrum export parameter. By the method, the unfrozen meat and the fresh meat can be completely and objectively identified.

Description

technical field [0001] The invention relates to the technical field of agricultural information detection, in particular to a method for identifying thawed meat and fresh meat based on impedance spectroscopy. Background technique [0002] Large ice crystals will form inside raw meat during frozen storage. These ice crystals can not only destroy cell membranes, damage cell tissue structure, and accelerate protein denaturation, but also the uneven size and distribution of ice crystals will cause a large amount of juice to flow out during the thawing process. , Seriously affect the quality of meat, such as the decline of flavor, the loss of juice, fat oxidation, sublimation or recrystallization of ice crystals, dehydration, decrease in tenderness, decrease in soluble protein, and decrease in the ability of protein to form a gel. According to foreign reports, concentrated in Europe, America, Japan and other countries, 8-15% of meat (hereinafter referred to as thawed meat) after ...

Claims

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Application Information

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IPC IPC(8): G01N27/02
Inventor 黄岚丁强王忠义何建昕
Owner CHINA AGRI UNIV
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