Device and method for carrying out microwave nondestructive measurement on characters of fruit and vegetable

A technology for measuring devices and measuring methods, applied in measuring devices, material analysis using microwave means, instruments, etc., can solve the problems of unsatisfactory fruit and vegetable characteristics, maturity of fruit and vegetable characteristics, uncertainty of taste freshness and damage, and inability to penetrate fruits and vegetables, etc. problem, to achieve the effect of simple and convenient operation, easy identification and selection, and non-destructive measurement

Inactive Publication Date: 2014-07-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, for the non-destructive testing of fruits and vegetables, infrared spectroscopy and visible spectroscopy are generally used, neither of which can penetrate the interior of fruits and vegetables, and can only obtain the skin information of fruits and vegetables, but cannot detect the quality of the interior of fruits and vegetables
In daily life, consumers are often unsure about the characteristics of fruits and vegetables (including maturity, taste, freshness and damage), so the fruits and vegetables they buy are not ideal, causing troubles

Method used

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  • Device and method for carrying out microwave nondestructive measurement on characters of fruit and vegetable
  • Device and method for carrying out microwave nondestructive measurement on characters of fruit and vegetable
  • Device and method for carrying out microwave nondestructive measurement on characters of fruit and vegetable

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Embodiment 1

[0048] In this embodiment, a microwave non-destructive measuring device for measuring the characteristics of fruits and vegetables is used to judge the ripeness of bananas. Select 3 bananas with different ripeness for measurement, namely the green bananas that are immature and need to be placed for a period of time before eating, the bananas that can be matured and can be eaten normally, and the bananas that are ripe and black and will go bad if you don’t eat them . Such as Figure 4 Shown are the measurement results of bananas with different ripeness, the solid line is the microwave reflection coefficient spectrum of immature green bananas, the dotted line is the microwave reflection coefficient spectrum of normal ripe bananas, and the broken line is the microwave reflection coefficient spectrum of ripe bananas Spectrum. From Figure 4 It can be seen from the figure that the impact of maturity on the microwave spectrum is mainly reflected in the low-frequency band (0.03GHz...

Embodiment 2

[0050] In this embodiment, a microwave non-destructive measuring device for measuring the characteristics of fruits and vegetables is used to judge whether the apple is damaged. At the same time, in order to ensure the accuracy of the experiment, two apples of the same variety with the same maturity were selected for the experiment, and apple No. 1 and apple No. 2 were two apples that looked similar in appearance. Firstly, the microwave nondestructive measurement was carried out on two undamaged apples to obtain the microwave reflection coefficient spectrum, and then the No. 1 apple was artificially damaged, and then the microwave reflection coefficient spectrum of the damaged No. 1 apple was measured. Figure 5 are the microwave reflection coefficient spectra of apples with different damage degrees, the solid line is the microwave reflection coefficient spectrum of No. Microwave reflectance spectrum after damage. It can be seen from the figure that the solid line and the dot...

Embodiment 3

[0052] In this embodiment, the freshness of apples is judged by using a microwave non-destructive measuring device for measuring the characteristics of fruits and vegetables. Firstly, the microwave reflectance spectrum of an apple was measured, and then the microwave reflectance spectrum was measured again after the apple was placed for three days, and the microwave reflectance spectrum of the apple before and after being placed was compared. Such as Figure 6 As shown, are the microwave reflectance spectra of apples with different freshness, the solid line is the microwave reflectance spectrum of fresh apples, and the dotted line is the microwave reflectance spectrum of the apples after three days. From Figure 6 It can be seen from the figure that apples with different degrees of freshness exhibit different microwave spectrum characteristics in the low frequency band (0.03GHz-4.7GHz) and high-frequency band (4.7GHz-14GHz). In the low-frequency band, the reflection coefficien...

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Abstract

The invention discloses a device and a method for carrying out microwave nondestructive measurement on characters of fruit and vegetable. The device comprises a microwave transceiver, a microwave receiving and sending wire and a receiving and sending probe. The fruit and vegetable are measured by microwave, the microwave has the penetrability so as to be capable of penetrating through the surfaces of the fruit and vegetable and entering the interiors of the fruit and vegetable, the microwave is reflected when penetrating through the internal organization of the fruit and vegetable, and the total reflection wave reflects the moisture of the interiors of the fruit and vegetable and the situation of pulp organization. According to the device and the method for carrying out the microwave nondestructive measurement on the characters of the fruit and vegetable, the microwave nondestructive measurement on the characters of the fruit and vegetable is provided, so that the problem that the bought fruit and vegetable is not ideal caused by the fact that people can not well know the quality, especially the moisture content, of the fruit and vegetable in the daily life at present is solved, and the judgment and selection of the people on the quality of the fruit and vegetable in the daily life are facilitated; the main characteristic of the method is the realization of the nondestructive measurement on the characters of the fruit and vegetable, and meanwhile the operations are simple and convenient.

Description

technical field [0001] The invention relates to the measurement of the characteristics of fruits and vegetables, in particular to a measuring device and a measuring method for microwave non-destructive measurement of the characteristics of fruits and vegetables. Background technique [0002] Fruits and vegetables are essential nutritious foods in people's daily diet. Fruits are not only rich in nutrients but also help digestion, and have health effects such as lowering blood pressure, slowing down aging, losing weight, skin care, improving eyesight, anti-cancer, and lowering cholesterol. Vegetables can provide a variety of vitamins and minerals necessary for the human body. According to the statistics of the International Food and Agriculture Organization in 1990, 90% of the vitamin C and 60% of the vitamin A necessary for the human body come from vegetables. In addition, there are a variety of phytochemicals in vegetables, which are recognized as effective components for h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/00
Inventor 刘燮仪
Owner PEKING UNIV
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