KR101581385B1

KR101581385B1 - Instant boiledrice container examination method

Info

Publication number: KR101581385B1
Application number: KR1020140060854A
Authority: KR
Inventors: 마연수; 방상문; 강대선
Original assignee: 주식회사 넥스트아이
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2015-12-31
Also published as: KR20150134463A

Abstract

The present invention relates to a method for inspecting foreign objects in a ready-to-eat rice container, and is capable of automatically checking a defective state due to rice balls or foreign matter in the course of manufacturing an instant rice container, thereby improving the reliability of the inspection.
In order to achieve the above object, the present invention provides a method for checking the presence or absence of foreign matter on a flange (11) of an instant rice container (10) which is moved along a conveyor belt in a state in which cooked instant rice (12) An image photographing step of irradiating a light source of a backlight (3) at a lower portion of the rice container (10) and taking an image of the area of the flange (11) of the instant rice container (10) by the camera (1) An image acquiring step of acquiring an image image of a region where a brightness difference appears in the photographed image; A brightness value checking step of checking whether the brightness value of the obtained image is less than or equal to an average brightness value of the peripheral flange 11; A length measuring step of measuring a length L of the obtained image when the brightness value of the image is not less than an ambient brightness value; Determining whether a length of the measured long axis L is greater than a predetermined value; An image comparing step of comparing the image shape with a pre-registered pattern image; Determining whether a foreign object is present through the size determination and the image comparison step; And a defective processing step of processing the ready-to-cook rice container as defective when the foreign substance is read.

Description

{INSTANT BOILEDRICE CONTAINER EXAMINATION METHOD}

The present invention relates to a method for inspecting a foreign object in a ready-made rice container, and more particularly, to a method for inspecting a foreign substance for automatically inspecting whether or not a container contains foreign substances during the production and packaging of instant rice.

In general, instant rice is just like the rice that you just warmed up. It is not only when you go on a trip or business trip, but also because it is hard for people to work on time, such as workers, dual-income couples or seniors.

Such instant rice is firstly prepared by washing the selected rice, then immersing it in the rice, then filling the rice in a separately formed container, lapping the rice without covering the lid, sealing the lid, .

On the other hand, if the foreign matter is introduced into the manufacturing process or the rice balls are positioned at the flange portion, a sealing failure occurs at the flange portion during the lid sealing process, thereby causing the deterioration of instant rice in the distribution process .

Therefore, the flange portion and the contents of the container are inspected for foreign matter before the lid sealing process.

As a prior art corresponding to such a foreign substance inspection technique, the Utility Model Application No. 2010-0007285 has proposed a container foreign matter inspection device capable of acquiring and inspecting a camera image inside a tube container.

However, in the case of instant rice, water vapor generated in the cooking process of rice may be formed into water droplets on the flange portion. In this case, since the image information does not select rice and water droplets, And the like.

In addition, since the instant rice is partially darker than the surrounding area, the rice is detected as foreign matter and is treated as defective.

The present invention has been proposed in order to solve the problems in the conventional container inspection process, and it is an object of the present invention to provide a test method capable of reading a case of water droplets formed on a flange portion of a container as normal, So that the accuracy of screening for the presence or absence of defective instant rice containers can be improved.

According to another aspect of the present invention, there is provided a method for inspecting the presence or absence of foreign matter in an instant rice container moved along a conveyor belt in a state in which cooked instant rice is packed therein, the method comprising: irradiating a backlight source at a lower portion of the instant rice container; An image capturing step of capturing an image of a specific portion of the instant rice container by a camera at an upper portion thereof; An image reading step of reading whether or not a portion where a brightness difference appears in the photographed image is displayed; An image obtaining step of obtaining an image shape of a portion where the brightness difference appears; A length measurement step of measuring a long axis and a short axis length of the obtained image; Determining whether the measured lengths of the long and short axes are greater than a predetermined value; An image comparing step of comparing the image shape with a pre-registered pattern image; Determining whether a foreign object is present through the size determination and the image comparison step; And a defective processing step of processing the ready-to-arrive rice container by defective if reading with the foreign matter is performed.

The present invention can automatically check the defective state due to rice balls or foreign matter in the course of manufacturing an instant rice container, thereby improving the inspection reliability.

Particularly, when rice grain, rice bran, water droplets, etc. are generated at the flange portion, the rice bran is treated as defective and the rice bran and water droplet can be effectively distinguished, thereby effectively distinguishing the defective type of the product.

In addition, it is possible to detect the packing pieces and hair at the instant rice portion in the container at the same time by installing the lights at the upper and lower portions at the same time, Lt; / RTI >

FIG. 1 is a flow chart of an instant rice cooker inspection process according to an embodiment of the present invention. FIG.
2 is a cross-sectional structural view of an instant rice container to be inspected in the present invention.
Fig. 3 is a plan view of a ready-to-cook rice container to be inspected in the present invention; Fig.
4 is a schematic structural view of the inspection apparatus of the present invention.
5 is a view showing an example of a flange defective area in the present invention.
FIG. 6 is an enlarged view of the rice and rice balls at the flange portion according to the present invention. FIG.
Fig. 7 is an enlarged view of a packing piece and an improvement of an instant rice portion in the present invention. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 4, a plurality of container seating portions 4 on which an instant rice container 10 can be placed are mounted on a conveyor belt (not shown) And a camera 1, 1 'for capturing an image is formed at the upper portion.

The back light 3, 3 'is provided at the lower part and the dome light 2, 2' is provided at the upper part for irradiating the light source to the instant rice container 10, , The brightness of the area of the flange 11 is appropriately adjusted and the occurrence of errors due to shadow generation at the instant rice 12 is prevented.

The inspection process by the inspection apparatus having such a configuration can be confirmed through the flowchart of FIG.

That is, when the instant rice container 10 is fed and the instant rice container 10 is conveyed by the conveyor belt or the like in a state where the instant rice container 10 is seated in the container seating portion 4, the dome lights 2, 2 ' The illumination of the backlight 3, 3 'is performed, and the camera 1, 1' captures an image of the ALL region including both the flange 11 and the instant rice 12, A false inspection 100 in which an inspection is performed on an entire area after setting an inspection area (a flange part, an irregular part of an instant rice) in a photographed image, a wing inspection 200 in which an inspection is performed on a flange part, And an inspecting inspection 300 for inspecting a site are sequentially performed.

First, when the defect inspection (100) process is performed, the entire region image of the photographed image is acquired and the entire (ALL) region is inspected.

That is, at this time, if it is determined that a region having a significantly lower brightness value exists in the entire region through the photographed image, a brightness value confirmation step is performed to check whether the image of the corresponding region is less than a set brightness value Abs TH, If the brightness value is equal to or less than a predetermined value set by the operator, a length measurement step of measuring the length L of the obtained image is performed as a next step.

For example, when the brightness value is set to 70 and the brightness value of the obtained image is 50, since the brightness value is less than the set value, the next step, the length measurement step, is performed.

If the brightness value of the image obtained in the brightness value checking step is equal to or greater than the set brightness value, it is determined that the image is not a foreign object, and the process goes directly to the wing check 200 process.

On the other hand, in the size determining step, it is determined whether or not the length of the measured long axis L is greater than the set value. If the length of the measured long axis L is equal to or larger than the set value, It is judged as normal and the next wing inspection (200) process proceeds.

Meanwhile, in the wing inspection 200 process, the inspection of the flange portion 11 of the container 10 is performed in more detail. At this time, the image of the flange region is acquired, Comparing the brightness of the image with a relative brightness value (Rel TH) of a portion of the flange (11), and if the brightness value is equal to or less than a set relative brightness value, And a length measuring step of measuring the length of the wafer. That is, at this time, the brightness difference A-B obtained by subtracting the brightness value B of the image from the average brightness value A of the flange portion 11 is compared with the set relative brightness value.

If the brightness value is equal to or greater than the relative brightness value, the process proceeds directly to the next step of the inspecting step 300 without the length measuring step.

For example, when the set relative brightness value is 23, the average brightness value A of the flange section 11 is 141, and the brightness value B of the image is 44, the brightness difference AB is 23 or more And the process proceeds to the next inspection process (300).

If the difference AB is less than or equal to 23 and the size determining step is performed, it is determined whether or not the length L of the measured image is greater than a predetermined value. If the difference is greater than a predetermined value, An image comparing step of comparing the shape with the pre-registered pattern image is performed.

That is, the pre-registered pattern image is obtained by preliminarily registering the shape image of the rice or water droplet for error correction. In the image comparing step, if the pattern image is compared with the previously registered pattern image, The next inspection process 300 is performed. If not, the instant rice container 10 is determined to be defective (NG).

If the length of the long axis L is less than the set value in the size determination step, it is determined that the image displayed on the flange 11 is not rice, and the process proceeds to the next inspection step 300.

When the image of the instant rice 12 is obtained in the instant rice container 12, the inspection of the instant rice 12 of the container 10 is performed. A brightness value comparing step of comparing the acquired image with a relative brightness value that is set or less; and a length measuring step of measuring a length L of the obtained image when the brightness value of the image is less than a relative brightness value. That is, at this time, the brightness difference A-B obtained by subtracting the brightness value B of the image from the average brightness value A of the instant rice 12 is compared with the set relative brightness value.

If it is greater than the relative brightness value, it is judged as normal product without the length measurement step, and the process proceeds to the next product mass production process.

The process proceeds directly to the next step of the inspecting process 300.

For example, when the set relative brightness value is 30, the average brightness value A of the instant rice 12 is 125, and the brightness value B of the foreign object image is 68, the difference AB of the brightness values is 30 It is judged as a normal product (OK).

If the difference AB is less than or equal to 30, it is determined whether the measured length L is greater than the set value. If the difference is greater than the predetermined value, (NG). Otherwise, it is judged as a normal product.

In particular, the portion of instant rice 12 minimizes the shade generated between the rice balls by adjusting the brightness of the backlight 3, 3 'and the dome light 2, 2' It is possible to improve the reliability of judgment by SKIP processing normally.

Accordingly, when the inspection method of the present invention is used, when water droplets, rice bran, rice balls, etc. are generated at the flange portion of the instant rice container, the water drops and rice bran are SKIP processed to judge to be a normal product, Products can be divided into.

Also, when the instant rice is defatted, rice bite, hair, and packing pieces are produced, the defatted bacon and rice bacon are skipped and judged to be normal products. The hair and packing pieces are treated as NG Can be realized.

1,1 ': Camera 2,2': Dome light
3,3 ': backlight 4: container seating part
10: Instant rice container 11: Flange
12; Instant rice

Claims

delete

A method for checking the presence or absence of foreign matter on a flange (11) of an instant rice container (10) moved along a conveyor belt in a state where cooked instant rice (12)
An image capturing step of irradiating a light source of a backlight (3) at a lower portion of the instant rice container (10) and taking an image of the area of the flange (11) of the instant rice container (10) by the camera (1)
An image acquiring step of acquiring an image image of the photographed region of the flange (11);
A brightness value comparison step of comparing a brightness difference value AB obtained by subtracting the brightness value B of the obtained image from an average brightness value A of the flange 11 with a set relative brightness value;
A length measuring step of measuring a length L of the obtained image when the brightness difference AB is less than a set relative brightness value;
Determining whether a length of the measured long axis L is greater than a predetermined value;
Comparing the image shape with a pre-registered pattern image when the measured length is greater than or equal to the preset length;
Determining whether a foreign object is present through the size determination and the image comparison step;
A defective processing step of processing the ready-to-arrive rice container by defective if reading is performed with the foreign matter;
The method of claim 1,

The method of claim 2,
In the image comparison step, when the pattern image of the shape of the cooked rice product or the water droplet generated in the cooking process is registered in advance, when the image image obtained at the flange portion matches the pattern image, A method for inspecting foreign bodies of instant rice containers.

A method for checking the presence or absence of foreign matter in an instant rice container moved along a conveyor belt in a state in which cooked instant rice is packed inside,
An image capturing step of irradiating a backlight source at the bottom of the instant rice container and imaging the instant rice 12 inside the instant rice container by the camera at the upper part;
An image acquiring step of acquiring an image image of a portion of the instant rice 12 from the photographed image;
Comparing a difference (AB) of brightness values obtained by subtracting a brightness value (B) of the acquired image from an average brightness value (A) of the instant rice (12) region with a set relative brightness value;
A length measuring step of measuring a length L of the obtained image when the brightness difference AB is less than a set relative brightness value;
Determining whether a length of the measured long axis (L) is greater than a predetermined value;
Determining whether the foreign object is foreign matter through the size determining step;
A defective processing step of processing the ready-to-arrive rice container by defective if reading is performed with the foreign matter;
The method of claim 1,

The method according to claim 2 or 4,
Wherein the determining step determines that the length of the long axis (L) is greater than a predetermined value.

The method according to claim 2 or 4,
Wherein the determination of the normal product is made when the brightness value difference (AB) is not less than the set relative brightness value in the brightness value comparing step.

The method of claim 4,
The light source is irradiated by the backlight 3,3 'under the instant rice container 10 and the light source irradiation by the dome light 2, 2' is performed at the upper portion of the instant rice container 10 The method according to any one of claims 1 to 3, wherein the first step is to prevent defective processing errors due to shading of the rice bran part.