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

A freshness and electronic nose technology, applied in the direction of material resistance, can solve the problems of high cost, long time-consuming, cumbersome process, etc.

Inactive Publication Date: 2013-01-16
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
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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,

Method used

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

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0057] Referring to Fig. 1, a method for detecting the freshness of river crucian carp by using an electronic nose, the electronic nose system mainly includes three parts: data acquisition, conditioning and transmission unit, sensor array and air chamber, and air supply power device, and is equipped with Air filter with activated carbon. The core device of the data acquisition, conditioning and transmission unit adopts an embedded microcontroller, which can realize functions such as sensor array signal acquisition and transmission, and pump valve opening control. The gas supply power unit includes gas sampling pump, cleaning pump, solenoid valve and other components. When the electronic nose test system is tested, the air chamber cleaning pump sends the pure air generated by the filter into the sensor air chamber to calibrate the sensor. Then...

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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...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 惠国华曾小燕尹芳缘王盈盈童春霞
Owner ZHEJIANG GONGSHANG UNIVERSITY
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