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Detecting method and device for fruit robustness

A detection method and firmness technology, applied in the direction of using a single impact force to test the strength of materials, can solve the problems of inaccurate detection results, low efficiency, unable to meet the needs of fruit grading, production and consumption, etc. Apply a wide range of effects

Inactive Publication Date: 2005-08-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are qualitative and quantitative evaluation methods for the detection of maturity such as fruit hardness, crispness and softness. The qualitative evaluation is based on hand feeling and visual inspection. The detection effect is quite inaccurate and the efficiency is low, which cannot meet the needs of fruit classification, production and consumption.

Method used

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  • Detecting method and device for fruit robustness
  • Detecting method and device for fruit robustness

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Embodiment Construction

[0011] refer to figure 1 , the fruit firmness detection device of the present invention comprises test bench 4, amplifier 8 and computer 10, has the pendulum bead 5 of suspension on the test stand 4, shows the swing angle scale plate 6 of pendulum bead fall angle, illustrated example Among them, the pendulum bead 5 is suspended on the position alignment scale 7, the pendulum bead is preferably a plastic bead, the bead quality is 10g-20g, and it is better to not produce fruit knock damage. On the platform of the test bench, there is a material tray 3 for placing the fruit 1, which is generally made of rubber clay or foam, and a miniature piezoelectric acceleration sensor 2 for sticking to the fruit is installed on one side of the material tray 3. The output terminal of the electric acceleration sensor is connected with the input terminal of the amplifier, and the output terminal of the amplifier is connected with the input terminal of the computer.

[0012] During detection, u...

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Abstract

The fruit robustness detecting device includes small pendulum ball, miniature piezoelectric acceleration sensor, amplifier and computer. While the small pendulum ball is used to knock middle part of fruit, the miniature piezoelectric acceleration sensor in the opposite side is used to obtain the dynamic signal, the amplifier amplifies the signal and the computer is used to perform Fourier transformation and spectral analysis to obtain main response frequency. By means of the computer data analysis software, relevant computer model of main response frequency, fruit mass, fruit density and fruit robustness is established for the direct calculation of fruit robustness. The present invention may be used in fast non-destructive judgment of ripeness degree of fruits, and may be used widely in the detection of fruit robustness of dry pear, peach, apple, etc.

Description

technical field [0001] The invention relates to a method and device for detecting fruit firmness without damage. Background technique [0002] The quality of the fruit after harvesting is good or bad, and fruits of different maturity levels are often mixed together. The difference in maturity will show the difference in hardness, crispness, firmness and looseness in the taste (that is, different firmness, also often called different hardness). At present, there are qualitative and quantitative evaluation methods for the detection of ripeness such as fruit hardness, crunchiness and softness. The qualitative evaluation is based on hand feeling and visual inspection. The detection effect is quite inaccurate and the efficiency is low, which cannot meet the needs of fruit grading, production and consumption. Quantitative evaluation is to use destructive methods, such as acupuncture with hardness meter (called Magness-Taylor meter abroad); use shear instrum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/30
Inventor 王俊
Owner ZHEJIANG UNIV