Method of using electronic nose for detecting freshness of river crucian carp

Abstract

A method of using an electronic nose for detecting freshness of river crucian carp includes the steps: (1) placing river crucian carp samples to be detected into a sample container, sealing and standing for 20-40min at the room temperature; (2) inserting a filtered gas probe of the electronic nose into the sample container for 40-60s, and collecting top gas; (3) enabling the gas to enter a gas sensor array for detection and analysis; and (4) collecting and storing related data of gas according to the specific process: (4-1) extracting response characteristic values of the gas sensor array, wherein the response characteristic values include an initial value, a stable value, rise time and rise rate; (4-2) curing a non-linear stochastic resonance algorithm into a digital signal processor internally arranged in the electronic nose, and inputting the original response characteristic values of the electronic nose into a DSP (digital signal processor) and outputting a signal-to-noise-ratio spectral characteristic value by computing; and (4-3) computing a freshness value of the river crucian carp according to a freshness prediction model and the signal-to-noise-ratio spectral characteristic value. The method is simple, convenient, rapid and effective.

Description

technical field [0001] The invention relates to the field of fish freshness detection, in particular to a method for detecting the freshness of river crucian carp by using an electronic nose based on a gas sensor array. Background technique [0002] Crucian carp is one of the important edible fishes in my country. Its meat is tender and tender, with a sweet taste and high nutritional value. Every 100 grams of meat contains 13 grams of protein, 11 grams of fat, and contains a lot of calcium, phosphorus, iron and other minerals. The medicinal value of river crucian carp is extremely high. Its nature and flavor are sweet, flat, and warm, and it enters the stomach and kidneys. [0003] Freshness is one of the important criteria for evaluating fish quality. A series of indicators and methods have been developed to evaluate the freshness of fish meat, such as sensory evaluation methods, microbiological methods, physical and chemical detection methods, etc., but the above detecti...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing method for the freshness of river crucian carp, such as cumbersome process, high cost, long time consumption, and sensor baseline drift, the present invention provides a simple, fast and effective method for detecting the freshness of river crucian carp by using an electronic nose

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