CN2816802Y

CN2816802Y - Device for detecting internal defect of foods

Info

Publication number: CN2816802Y
Application number: CN 200520113982
Authority: CN
Inventors: 韩东海; 温朝晖
Original assignee: China Agricultural University
Current assignee: China Agricultural University
Priority date: 2005-07-18
Filing date: 2005-07-18
Publication date: 2006-09-13
Anticipated expiration: 2015-07-18

Abstract

The utility model relates to a device for detecting internal defects of foods. The utility model comprises an X-ray generator, a linear array detector arranged under the X-ray generator, a conveying belt arranged between the X-ray generator and the linear array detector, an image collecting card for connecting the linear array detector, and a computer provided with the image collecting card and control software, wherein the conveying belt can be driven by a motor to move in the vertical direction of the irradiating direction of X-rays. The utility model has the advantage that the existence of foreign matter in the inside of processed foods or in packed foods can be automatically resolved as foods are detected. If the detected foods are fruits with internal quality defects, the satisfaction of quality requirements can be detected and the quality defects can also be graded. The utility model can be widely used for detecting foreign matter mixed in the inside of various processed foods or in packed foods, and can also be widely used for the more meaningful on-line one by one operating detection and sorting of fruits.

Description

A kind of food Inner Defect Testing device

Technical field

The utility model relates to a kind of food inspection device, particularly about a kind of inner foreign matter of process food inside or packaged food or quality is changed the food Inner Defect Testing device that detects.

Background technology

At present, domestic for the checkout equipment of sneaking into foreign matter in processed food or the packaged food, mainly be to adopt special metal detector, and, use the said equipment to detect the foreign matter beyond the metal at iron and stainless steel etc.Other inside of food quality " basket " such as the good watermelon of profile the inside, and there is water core vivid apple the inside, and the variation of these inside qualities is not generally cut and can't directly be observed.

There is some difference because the variation of sneaking into the foreign matter of food inside or food quality is all with the density of food itself, and can in two dimensional image, reflect the density variation of interior of articles by x-ray imaging, therefore the x-ray imaging technology being used for the detection of food foreign matter, is the problem of the utility model research.

Summary of the invention

The purpose of this utility model provides a kind of food Inner Defect Testing device that can carry out Non-Destructive Testing to food in the process of food transmission.

For achieving the above object, the utility model is taked following technical scheme: a kind of food Inner Defect Testing device, and it is characterized in that: it comprises: an x ray generator; One is arranged on the linear array detector of described x ray generator below; One is arranged between described X-ray generator and the described linear array detector by the conveying belt of motor-driven perpendicular to described radiation exposure direction motion, one connects the image pick-up card of described linear array sniffer, and one is equipped with the computing machine of described image pick-up card and Control Software.

Described conveying belt is arranged to the ring-type of a sealing around described linear array detector.

The motor that drives described conveying belt connects the frequency converter of an adjustment rotating speed.

The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is with x ray generator, linear array detector, image pick-up card, main control computer concentrates in together, be equipped with the transport tape between x ray generator and linear array detector, the streamline of having formed the Non-Destructive Testing of a food inherent vice, can realize the online detection of food, the utility model is simple in structure simultaneously, most of parts can directly be bought from the market, implement easily, be very beneficial for promoting.2, the utility model is according to foreign matter or the food inside quality principle that density with normal food there are differences that changes, send X ray by x ray generator, convert digital signal to according to digital signal structure two dimensional image input computing machine by the X ray energy of linear array detector reception and through image pick-up card, therefore when carrying out food inspection with the utility model, can tell in processed food inside or the packaged food whether have foreign matter automatically, but and detection computations go out the physical dimension of foreign matter volume; If mass defects such as the pathology that tested food is fruit internal to be taken place, cavity not only can differentiate whether reach quality requirements by calculating, can also carry out classification to quality problems.The utility model can be widely used in the check of the various foreign matters of sneaking in various processed foods inside or the packaged food, and can be widely used in the one by one inspection and the sorting of online fruit, and its meaning is more great.

Description of drawings

Fig. 1 is the structural representation of the utility model food inspection device.

Fig. 2 is the utility model food inspection Device Testing operational flowchart.

Embodiment

As shown in Figure 1 and Figure 2, the utility model comprises x ray generator 1, one linear array detector, 2, one image pick-up cards 3 and a computing machine 4.X ray generator 1 is made up of high pressure generator 11, X-ray tube 12 and X ray generator controller more than 13 parts.Linear array detector 2 is installed in x ray generator 1 below, image pick-up card 3 is passed through data line connecting line array detector 2, and image pick-up card 3 is connected computing machines 4.One conveying belt 6 by motor 5 drives is set between linear array detector 2 and x ray generator 1, and conveying belt 6 can be centered around linear array detector 2 in the ring-type of a sealing.

In the foregoing description, motor 5 can connect a frequency converter 7, and the rotating speed of motor 5 is adjusted in the adjusting by frequency, with coupling integral time of linear array detector 2.Establishment in advance has the software systems relevant with detection in the computing machine 4.X ray generator 1 in the foregoing description, linear array detector 2, image pick-up card 3, and image pick-up card 3 is prior art with being connected of computing machine, inventive point of the present utility model is that the various device that can buy or customize combines, and a conveying belt is set again, and then forms the device that a cover can carry out Non-Destructive Testing to the food inherent vice, therefore repeat no more in this concrete principle of work, and only describe whole inventive concept of the present utility model existing each several part.

Design concept of the present utility model is: metal is arranged in food, the nonmetal foreign matter that waits, the cavity appears in the watermelon, when apple generation water core or the like situation occurs, food inside all can produce variable density, the x-ray bombardment that x ray generator 1 sends is after on the food, the linear array detector 2 that can be set up thereunder receives, density difference along with food inside, the ray energy that linear array detector 2 receives is just different, the digital signal of changing and be transferred to image pick-up card 3 is just different, digital signal is made up and is transferred to the two dimensional image of computing machine 4 with regard to difference by image pick-up card 3; Determined the time interval of a digital signal of every transmission the integral time of linear array detector 2, can obtain the distance that food moves with conveying belt 6 in this time interval according to this time interval, that is computing machine 4 whenever obtains the represented food thickness of digital picture of a section.Computing machine 4 can be according to the publish picture volume of each pixel in the picture of the digital picture that obtains and food THICKNESS CALCULATION, calculate by the funtcional relationship of each gray values of pixel points and density again, just can obtain the Density Distribution situation (hereinafter to be referred as pixel value) of arbitrary cross-section, and, judge whether this section has the existence of foreign matter or the variation of quality according to that set in advance and the difference standard food pixel value.Computing machine can also be provided with the judgement of a plurality of section stacks, or the judgement of each section stack of whole food, and provides the result.

According to above design concept, when the utility model carries out food inspection, roughly may further comprise the steps:

1, proofreaies and correct and gather background image (image when not having material), obtain the pixel value of background image, this pixel value can be made as 0 point;

2, starter motor 5, by the movement velocity that frequency converter 7 is regulated conveying belt 6, are complementary its integral time with linear array detector 2, start x ray generator 1, linear array detector 2, and the standard model of food is placed on begins detection on the conveying belt 6;

3,4 pairs of images that obtain of computing machine pass through computed in software, the pixel value of the relative background image that gets standard samples, and deposit computing machine 4 in, as the benchmark of this based food;

4, determine and the difference range of benchmark that according to the foreign matter type promptly surpassing this difference promptly should be disallowable, further,, the difference range of segmentation can also be set for determining the quality grade of tested food;

5, detected food is placed on the conveying belt 6, the X ray of the detected food that each passes through from x ray generator 1 below can detect by linear array detector 2, and be converted to digital signal output, image pick-up card 3 makes up two dimensional image according to digital signal, and be transferred to computing machine 4, after the reference value of calculating of computer software process and standard food compares, provide the result whether foreign matter is arranged and provide food quality grade result.

Claims

1, a kind of food Inner Defect Testing device, it is characterized in that: it comprises: an x ray generator; One is arranged on the linear array detector of described x ray generator below; One is arranged between described X-ray generator and the described linear array detector by the conveying belt of motor-driven perpendicular to described radiation exposure direction motion, one connects the image pick-up card of described linear array sniffer, and one is equipped with the computing machine of described image pick-up card and Control Software.

2, food Inner Defect Testing device as claimed in claim 1 is characterized in that: described conveying belt is arranged to the ring-type of a sealing around described linear array detector.

3, food Inner Defect Testing device as claimed in claim 1 is characterized in that: the motor that drives described conveying belt connects the frequency converter of an adjustment rotating speed.