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Method and apparatus for non-destructive testing of fruit internal quality based on optical properties

An internal quality, non-destructive testing technology, applied in the measurement of color/spectral characteristics, measuring devices, using optical devices, etc., can solve the problems of large detection errors, different detection positions, inconsistent detection positions, etc., to improve accuracy Effect

Inactive Publication Date: 2006-09-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the online non-destructive testing device for the internal quality of fruits is immature and there are many problems: such as the detection accuracy and detection speed need to be improved
There are certain problems in the current detection method: the height of the light irradiated by this type of device and the detection probe are fixed. If the size of the fruit to be tested is not uniform, the detection position for each fruit will be different. The detection position is not consistent with the detection position of the fruit during modeling, which causes a large detection error
However, there is no domestic report on the non-destructive detection device for fruit internal quality indicators (sugar content, acidity, hardness and VC content, etc.)

Method used

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  • Method and apparatus for non-destructive testing of fruit internal quality based on optical properties
  • Method and apparatus for non-destructive testing of fruit internal quality based on optical properties
  • Method and apparatus for non-destructive testing of fruit internal quality based on optical properties

Examples

Experimental program
Comparison scheme
Effect test

test approach 1

[0061] Detection scheme 1: At the beginning of the detection, the light source irradiates the fruit sample 9 to be tested, the irradiated light of the light source system 5 is transmitted through the inside of the fruit, and the transmitted light of the fruit sample to be tested passes through the light collimation element 602 installed at the bottom of the tray, and passes through the The slit of the partition 601 is irradiated on the concave reflector 606 in the detection box 607, and the transmitted light is reflected by the concave reflector and then directed to the detection probe 605 located at the focal point F of the concave reflector; because of the movement of the tray 8, the transmitted light is The concave mirror moves, but the reflected transmitted light will be directed to the detection probe at the focal position of the concave mirror. When the tray moves from point A to point B to complete the integration time required for detection, and the integration and sum o...

test approach 2

[0062] Detection scheme 2: at the beginning of the detection, the light source illuminates the fruit sample 9 to be tested, and the light is transmitted through the inside of the fruit. On the plane reflector 609 on the reflector conveyor belt 612 in the detection box 607, the angle between the plane reflector and the horizontal plane is 45 degrees, and the transmitted light is reflected by the plane reflector and shoots to the fixed axis level detection probe 605; because the tray 8, the transmitted light is also moving, according to the moving speed of the pallet, the drive motor 614 of the reflective mirror conveyor belt 612 drives the plane reflector on it to move synchronously with the pallet at the corresponding speed, and the plane reflector always reflects the transmitted light Shooting to the detection probe, when the tray moves from point A to point B to complete the integration time required for detection, and the integration and acquisition of the spectrum are continu...

test approach 3

[0063] Detection scheme 3: at the beginning of the detection, the light source illuminates the fruit sample 9 to be tested, and the light is transmitted through the inside of the fruit. On the rotatable plane mirror 615 in the detection box 607, the transmitted light is reflected by the plane mirror and shoots to the fixed axis level detection probe 605; because of the movement of the tray, the transmitted light is displaced in the horizontal position, in order to make the displacement change The transmitted light will be directed to the detection probe after reflection, requiring the plane mirror to rotate around point O to meet the detection requirements; the rotation of the plane mirror is realized by the mirror rotation drive device 616, when the tray moves from point A to point B to complete the detection The required integration time, and the integration and acquisition of the spectrum are continuous in the whole process; the collected transmitted light is sent to the fib...

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Abstract

This invention relates to a method and apparatus for non-destructive testing of fruit internal quality based on optical properties. The device comprises a send unit, an analysis and process unit to evaluate the fruit referred to a stored quality prediction model, a signal control unit to send the fruit position and size information to the detection system with command format, an illumination system to provide stable and optimal-strength light, a detection system to obtain and send the transmitted spectrum information for fruit inner quality to the analysis and process unit, a fruit grade-outlet, a size detection device, and a coder. This invention improves on-line detection speed and precision.

Description

technical field [0001] The invention relates to an online nondestructive detection method and device for internal quality based on the optical characteristics of fruits. Background technique [0002] The internal quality inspection and grading of fruits has always been one of the most important steps in the processing of agricultural products, because proper quality grading can not only extend the storage period and transportation distance of fruits, but more importantly, increase the economic value and sales price of fruits. With the continuous increase of fruit production and the continuous improvement of people's living standards, consumers pay more and more attention to internal quality such as taste, sugar content, acidity and internal nutritional quality such as vitamin content when purchasing fruit. At present, the inspection of the internal quality of fruits is often based on destructive chemical analysis, such as anthrone colorimetry or sugar meter for sugar content...

Claims

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Application Information

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IPC IPC(8): G01N21/27G01N33/02G01B11/00B07C5/342
Inventor 应义斌陆辉山徐惠荣傅霞萍田海清刘燕德
Owner ZHEJIANG UNIV
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