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A rapid and non-destructive detection method for moisture content in abalone drying and rehydration process

A non-destructive testing, abalone technology, applied in the direction of measuring devices, material analysis through resonance, material analysis, etc., to achieve the effect of overcoming adverse effects, short analysis time, and simple operation process

Active Publication Date: 2017-11-10
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on rapid and non-destructive detection of water content in abalone drying and rehydration process using low-field nuclear magnetic resonance technology has not been reported

Method used

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  • A rapid and non-destructive detection method for moisture content in abalone drying and rehydration process
  • A rapid and non-destructive detection method for moisture content in abalone drying and rehydration process
  • A rapid and non-destructive detection method for moisture content in abalone drying and rehydration process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Sample collection: select 30 fresh abalones and 2-8g dried abalones with a moisture content below 20%;

[0032] 2. Sample low-field nuclear magnetic analysis: use the Mini MR-Rat magnetic resonance imaging analyzer to perform low-field nuclear magnetic analysis on each sample, and use the CPMG sequence to measure the transverse relaxation time T2 of the abalone. The parameter setting is: 90-degree pulse width P1: 13μs, 180-degree pulse width P2: 26μs, re-sampling waiting time Tw: 3000ms, analog gain RG1: 15, digital gain DRG1: 3, preamplifier gain PRG: 1, NS: 8, NECH: 3000, receiver bandwidth SW : 200KHz, the control parameter RFD of the start sampling time: 0.002ms, the time delay DL1: 0.5ms, obtain the echo attenuation curve, and then use the one-dimensional inverse Laplace algorithm as the transverse relaxation time T2: Inversion algorithm (number of iterations : 1000000), the transverse relaxation spectra of each sample were obtained through mass normalization. ...

Embodiment 2

[0042] Example 2 Prediction of Moisture Content in Abalone Drying and Compounding Process

[0043] S1. Sample collection: select 5 abalones with different drying and rehydration levels;

[0044] S2. Low-field nuclear magnetic analysis of samples: use Mini MR-Rat magnetic resonance imaging analyzer to conduct low-field nuclear magnetic analysis on each sample in 1, and use CPMG sequence to measure the transverse relaxation time T2 of abalone. The parameter setting is: 90-degree pulse width P1: 13μs, 180-degree pulse width P2: 26μs, re-sampling waiting time Tw: 3000ms, analog gain RG1: 15, digital gain DRG1: 3, preamplifier gain PRG: 1, NS: 8, NECH: 3000, receiver The bandwidth SW: 200KHz, the control parameter RFD of the start sampling time: 0.002ms, the time delay DL1: 0.5ms, and the echo attenuation curve is obtained.

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Abstract

The invention relates to a method for rapid and nondestructive detection of the water content in the abalone drying and rewatering process. The method comprises the following steps: acquiring echo attenuation curve data of fresh abalone samples, drying the fresh abalone samples, and acquiring the CPMG signals of the fresh abalone samples in the drying process; rewatering the dried abalone samples after the echo attenuation curve data of the fresh abalone samples is acquired, and acquiring the CPMG signals of the dried abalone samples in the rewatering process; determining the real water content of every sample; establishing a water content predicating model corresponding to the real water content in the drying and rewatering process; and acquiring the echo attenuation curve data of an abalone sample to be detected through adopting the same technology, and combining with the water content predicating model to obtain the predicated value of the water content of the abalone sample to be detected. The method has the advantages of high measurement result accuracy, short time, no damages to abalones, fastness, and no pretreatment of the abalones, and can realize rapid and nondestructive detection of the water content of the abalone drying and rewatering process.

Description

technical field [0001] The invention relates to the technical field of water content detection of abalone, in particular to a method for rapid and non-destructive detection of water content in the drying and rehydration process of abalone. Background technique [0002] Abalone belongs to the mollusk phylum, Gastropoda, Prebranchia, Primitive Gastropoda, Abaceae, and the genus Abalone. Single-valve mollusk, only half shell, hard shell, flat and wide. Abalone has been ranked first among the "Eight Treasures of Seafood" since ancient times. Its meat is relatively tender, fresh but not greasy, and rich in nutrition. It is known as the "soft gold" on the table. About 216 species of abalone have been found in various sea areas around the world, about 30 species are common, but only about 20 species can be produced on a large scale, mainly distributed in the Northwest Pacific, Northeast Pacific, Southwest Pacific and southern Africa. [0003] In recent years, with the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
CPCG01N24/082
Inventor 谭明乾宋玉昆董秀萍陈腾
Owner DALIAN POLYTECHNIC UNIVERSITY
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