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Method and device for online detection of watermelon density

A detection device, watermelon technology, applied in the direction of measurement device, specific gravity measurement, instrument, etc., to achieve the effect of improving detection speed, realizing automation, and reducing errors

Active Publication Date: 2015-08-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some scholars are working on researching equipment for volume detection, there is still a certain distance from practical application.

Method used

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  • Method and device for online detection of watermelon density
  • Method and device for online detection of watermelon density
  • Method and device for online detection of watermelon density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 and figure 2As shown, the detection system is mainly composed of a resonant cavity body 1, a resonant cavity bottom cover 2, a mounting frame 13, an adjustable support 14, a signal generator 6, an amplifier 5, a speaker 4, a speaker support 10, a microphone 3, and a data acquisition card 7. Gravity sensor 9, supporting plate 8 and cylinder 19 are formed. The resonant cavity 1 is fixed on the mounting frame 13 through the hexagon socket bolt 12, the microphone 3 is fixed on the thin neck 16 of the resonant cavity 1 and its height is adjustable, and the speaker 4 is installed on the narrow neck of the resonant cavity 1 through the speaker support 10 16, the height of the loudspeaker support 10 is adjusted up and down through the positioning screw 11, the cylinder 19 is fixed on the mounting frame 13, and is located directly below the resonance cavity 1, the gravity sensor 9 is fixedly connected with the piston on the cylinder 19, and the supporting plat...

Embodiment 2

[0034] The detection system is the same as in Example 1.

[0035] Such as Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the delivery system consists of double speed chain 17, the second watermelon tray 42, the third stopper 35, the first driving lever 38, the second driving lever 40, the first air motor 39, the second air motor 41, the transition plate 37 and Guide bar 36 forms. The double-speed chain transmission is the same as the delivery system (embodiment 1); the double-speed chain transmission device is installed on the left and right sides of the mounting frame 13 of the detection system respectively; the first driving lever 38 and the second driving lever 40 are respectively installed on the first air motor 39, The second air motor 41 shaft end, the first air motor 39 is installed on the outside of the double speed chain transmission on the left side, the second air motor 41 is installed on the transition plate 37, and the transition plate...

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PUM

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Abstract

The invention discloses a watermelon density on-line detection method and a watermelon density on-line detection device. The device comprises a detection system, a conveying system and a control system. The method comprises the following steps of: after putting a watermelon into a resonant cavity, inputting a frequency-modulated wave with a certain frequency into the resonant cavity so as to cause that air in the resonant cavity vibrates to resonate; performing fast Fourier transformation on a resonant signal, and extracting a resonant frequency so as to obtain the size of the watermelon; and dividing the quality of the watermelon by the size of the watermelon to obtain the density of the watermelon. According to the method and the device, the quality and size of the watermelon can be detected on line quickly, non-destructively and accurately. By designing two conveying systems, the watermelon can be automatically detected, the detection speed can be increased, errors caused by manual operation are reduced, and the detection accuracy is improved. By aiming at the problems that the conventional watermelon size detection way is not diversified and the conventional method is time-saving and labor-saving, a new idea is provided, and a new technical way is provided for subsequent quality detection and grading.

Description

technical field [0001] The invention relates to a method and a device for online detection of watermelon density by using Helmholtz resonance. Background technique [0002] Watermelon is not only thirst quenching and refreshing, but also rich in nutrition, and is deeply loved by the people. With the improvement of the living standards of modern people, the demand for watermelon in the consumer market has also changed, not only requiring good flavor quality, but also putting forward high requirements in terms of variety commodity. At present, the non-destructive testing methods for watermelon are the most widely used percussion acoustic characteristics and vibration characteristics. The main reason is that the requirements on technology and equipment are relatively simple and the price is low. However, this method has certain limitations, especially in the detection process, it is difficult to avoid the noise interference in the environment. In addition, the watermelon fruit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N9/24G01N9/36G01N35/04
Inventor 徐惠荣陈华瑞鲍军其应义斌
Owner ZHEJIANG UNIV