KR102541085B1 - Inspecting system for packing situation of metal coil - Google Patents

Abstract

The present invention relates to a coil packaging inspection system which can confirm the appropriateness of a coil packaging process without interfering with other equipment or hindering a packaging operation, and can concurrently perform an inspection of an inner coil portion and a quality inspection of the final packaging state. The coil packaging inspection system comprises: a remote capturing unit which includes at least one CCTV camera capturing remote videos utilizing a zoom function, a relay distributing the remote videos, and a recorder storing the remote videos distributed from the relay; a close-range capturing unit which includes vision cameras provided at a plurality of locations along a coil transport line to capture close-up videos, and robot units on which the vision cameras are mounted; a subordinate PLC which receives information about a coil to be inspected from a master PLC and controls all sorts of equipment on the transport line and controlling the CCTV camera, the vision cameras, and the robot units based on the information; and a data processing unit which includes a PC equipped with a program generating and managing remote still cuts and close-up still cuts from the remote videos and close-up videos, and a display unit displaying the remote videos, the close-up videos, and packaging inspection-related information provided by the PC.

Description

Coil packaging inspection system {Inspecting system for packing situation of metal coil}

The present invention relates to a coil packaging inspection system, and more particularly, to a coil packaging inspection system capable of inspecting packaging quality without interfering with packaging work by using a CCTV camera having a zoom function and a vision camera operated by a robot. it's about

In general, cold-rolled, plated, and pickled metal coils (hereinafter referred to as 'coils') in steelworks are wrapped with packaging materials (inner and outer cardboard, corner cardboard, etc.) to prevent rust, and then tied members (coil bands, clips, taping, etc.) ) to perform the packaging work to fix it.

If the packaging is in poor condition, rust or contamination may occur before the coil product arrives at the customer, which may cause a claim, and product information stickers (coil specifications, LOT NO, or barcode printed) or handling caution stickers ( (Hereinafter referred to as 'sticker'), etc. must be attached to the location desired by the customer, but omission of the sticker or inaccurate location are also subject to complaints.

In order to prevent such claims, packaging quality inspections are conducted. As with inner cardboard packaging, it is not possible to determine whether or not normal packaging has been achieved through external inspection, so packaging and some inspections are performed in parallel.

Therefore, the overall process efficiency of the packaging line may be lowered due to such parallel operations. In addition, the specifications and customer requirements of coils passing through the packaging line change from time to time, which means that the inspection items are also frequently changed, which can lead to inspection defects such as missing items due to human inspection.

Accordingly, the present applicant attempted to incorporate a device for inspecting coil defects introduced in Korean Utility Model Registration No. 20-0194332 (registration date: 2000.06.20.) into a packaging quality inspection system.

As shown in FIG. 1, the coil defect inspection apparatus is disclosed in a structure in which a rail (L) is built adjacent to the coil transfer line and a bogie (V) to which a camera (C) is attached is provided. do.

However, if a robot equipped with a vision camera for packaging quality inspection is built close to the coil transfer line, interference with other facilities or worker safety accidents may occur. In the case of installation, there is a limitation that it is difficult to inspect the packaging state of the coil inner winding part (coil hollow part).

In addition, since this inspection device only inspects the quality of the final packaging of coils, whether the operator worked according to the predetermined packaging method and order or the specified materials (eg, corner cardboard and inner cardboard) in the middle of the coil packaging operation There is a problem that there is no way to check whether cardboard, etc.) was used.

KR 20-0194332 Y1 2000.06.20.

The problem to be solved by the present invention is to check the appropriateness of the coil packaging process without interfering with other facilities or interfering with the packaging operation, and to perform quality inspection of the final packaging state, including the inspection of the inner winding part of the coil. To provide a coil packaging inspection system.

In order to solve the above problems, the coil packaging inspection system of the present invention includes at least one CCTV camera that takes a remote video using a zoom function, a repeater that distributes the remote video to a recorder and a PC, and a remote video distributed from the repeater. a remote photographing unit including a recorder for storing; a short-distance photographing unit provided at a plurality of locations of the coil transfer line and comprising a vision camera for photographing a close-up video and a robot unit to which the vision camera is mounted; A lower level that controls the CCTV camera, vision camera, and robot unit based on the received information of the coil to be inspected from the upper PLC that controls the equipment of the transfer line so that remote and close-up videos suitable for packaging quality inspection are captured. PLC; and a PC having a built-in program for generating and managing remote still-cuts and near-still-cuts from the remote and close-up videos, and a display unit displaying pavement inspection-related information provided by the PC, including the remote and close-up videos. The data processing unit displays the remote and close-up videos provided by the CCTV camera and the vision camera on the display unit in real time, and after the coil stops at a predetermined position on the transfer line, a plurality of specific At the point of time, a steel cut of the designated coil part is created according to the inspection item, and the created steel cut is saved in a designated folder with a designated name, so that it can be checked whether the coil packaging process has been properly performed.
In addition, in the coil packaging inspection system of the present invention, an entry vision camera capable of entering the coil hollow portion and photographing the entire inner circumferential surface of the short-range imaging unit and a rotating cylinder coupled thereto are additionally mounted.
In addition, the coil packaging inspection system of the present invention, after the data processing unit counts the number of stickers contained in the steel cut, compares the information obtained from the upper PLC and processes the result to be displayed on the monitor of the display unit, so that the inspection can be performed. It is done.

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According to the coil packaging inspection system of the present invention, it is possible to minimize interference with other facilities or interference with packaging work through a CCTV camera provided away from the coil transfer line.

In addition, according to the coil packaging inspection system of the present invention, through a program that generates still cuts necessary for inspection from a video of a CCTV camera, in the middle of the coil packaging operation, whether the worker worked according to a predetermined packaging method and order or used a predetermined material The overall reliability of the coil packaging inspection is improved.

In addition, according to the coil packaging inspection system of the present invention, the work efficiency of the coil packaging line is improved by using an appropriate number of CCTV cameras and vision cameras.

1 is a front view showing a coil defect inspection apparatus according to the prior art.
2 is a configuration diagram showing a coil packaging inspection system according to the present invention.
3 is a plan view showing a short-range imaging unit for inspecting the side of a coil in the coil packaging inspection system according to the present invention.
4 is a plan view showing a short-range imaging unit for inspecting the front/rear surface of a coil in the coil packaging inspection system according to the present invention.
5 is a plan view illustrating a short-range imaging unit for inspecting an inner winding portion of a coil in the coil packaging inspection system according to the present invention.
6 is a screen illustrating packaging inspection-related information displayed on the display unit of the coil packaging inspection system according to the present invention.
7 illustrates a steel cut of defective packaging displayed on the display unit of the coil packaging inspection system according to the present invention.

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

Referring to FIG. 2, the present invention provides a remote capture unit 10 that obtains video information (hereinafter referred to as 'remote video') with a CCTV camera 11 and video information (hereinafter referred to as 'close video') with a vision camera 21. A short-distance photographing unit 20 for obtaining), a lower PLC 30 for controlling the CCTV camera 11 and the vision camera 21 to obtain the remote and close-up videos, and still cuts from the remote and close-up videos. Creating an image (hereafter, a still cut image generated from a remote video is referred to as a 'remote still cut' and a still cut image generated from a proximity video is referred to as a 'near still cut') and using it to determine the pass/fail of packaging quality It consists of a data processing unit (40).

Hereinafter, the specific content of the present invention will be described focusing on the above components. First, the long-distance photographing unit 10 utilizes a zoom function in a state located at a distance from the transfer line to capture all or a specific part of the coil on the transfer line. At least one CCTV camera 11 for taking pictures, a repeater 12 for distributing the remote video acquired by the CCTV camera 11 to a recorder 13 and a PC 41 to be described later, and a relay 12 distributed from the repeater 12 It consists of a recorder 13 that stores remote video and a joystick 14 that instructs movement of the CCTV camera 11 and zoom-in/zoom-out.

The CCTV camera 11 is installed at a location capable of capturing the entire coil image without interfering with other facilities or interfering with the packaging work.

A network video recorder (NVR) is used as the recorder 13, and the stored remote video is automatically deleted in a first-in-first-out manner after a specified time.

On the other hand, the joystick 14 is a component that controls the CCTV camera 11 separately from the control of the lower PLC 30, and the CCTV camera 11 to closely observe the packaging work process or packaging state in the real-time monitoring process. is used for manual operation.

The short-distance photographing unit 20 is provided at a plurality of locations of the coil transfer line L, and consists of a vision camera 21 for capturing a close-up video and a robot unit 22 to which the vision camera 21 is mounted.

The vision camera 21 approaches the coil through the operation of the robot unit 22 and performs a photographing task, and a 3-axis robot or a 6-axis robot is mainly used as the robot unit 22 .

The disposition structure of the short-range imaging unit 20 on the coil transfer line is as follows.

First, as for the arrangement of the near-field imaging unit 20 for inspecting the side of the coil, as shown in FIG. 3, a pair of near-field imaging units 20 are disposed at positions corresponding to each other based on a line so that both sides of the coil can be inspected. . In consideration of the fact that the diameter deviation (750 ~ 2200 mm) of the coil is large, the robot unit 22 is disclosed in a configuration capable of moving forward/backward so that the vision camera 21 can take a close-up video suitable for the size of the coil. .

In the coil side inspection, a band quantity confirmation inspection, a band location inspection, a band clip presence inspection, and a sticker attachment inspection are inspected.

Next, in the arrangement of the short-range imaging unit 20 for inspection of the front/rear surface of the coil, as shown in FIG. It is mounted on the transfer cylinder 221 so that the front/rear side of the coil can be photographed by entering between the coils.

The coil front/rear inspection is carried out using the vision camera 21 to check the band quantity, inspect the band position, inspect the angle between the bands, and inspect the existence of the band clip by using the vision camera 21 as the center to the area including the band clip as the inspection area. , whether the sticker is attached or not.

Finally, the short-range imaging unit 20 for inspecting the inner winding portion of the coil may be provided alone, but as shown in FIG. 5, it is added to the short-range imaging unit 20 for inspecting the side of the coil, that is, entering the hollow part of the coil. It is disclosed as a configuration in which an entry vision camera 21 ′ capable of photographing the entire inner circumferential surface and a rotating cylinder 222 having a long rod coupled thereto are additionally mounted.

The lower PLC (Programmable Logic Controller) 30 receives the information of the coil to be inspected from the upper PLC (A) that controls the equipment of the transfer line, and based on this, the CCTV camera 11, the vision camera 21, and the robot unit (22) is controlled so that remote and close-up videos suitable for packaging quality inspection are taken.

The data processing unit 40 includes a PC 41 having a built-in program for creating and managing remote still cuts and close still cuts, and a display unit displaying pavement inspection-related information provided by the PC 41 as shown in FIG. (42).

The display unit 42 displays the remote and close-up videos provided by the CCTV camera 11 and the vision camera 21 in real time, and after the coil stops at a predetermined position of the transfer line, the inspection item is displayed at a plurality of specific points in time. According to this, a steel cut of the designated coil part is created.

Here, the specific points in time are, for example, 5 minutes and 10 minutes when the inner cardboard packaging is completed 5 minutes after the coil is stopped and the outer cardboard packaging is completed 10 minutes later.

The created still cut is saved in the designated folder with the designated name, and the last still cut is displayed in the folder. If the worker wants to check the previously created still cut, call the saved still cut from the folder and inspect the packaging quality.

In this way, the present invention can check whether or not the coil packaging intermediate work has been properly performed.

At this time, in the inspection, the inspector examines the material of the wrapping paper, the folding state, the rubber PAD attachment state, the taping state, the wrapping paper folding state, and the steel cut showing the binding state of the steel band. It can be made in such a way as to check (a), check the band quantity and position (b), check whether the band angle is constant (c), check whether the inner circumferential ring is seated (d), find out whether the banding is appropriate (e), etc. .

In addition, in the inspection, after the program reads the coil lot number (LOT No.) contained in the still cut or counts the number of stickers, the program compares it with the information obtained from the upper PLC (A), and the result is displayed on the monitor of the display unit 42 It can be made in a way displayed on the top.

In the present invention, a deep learning technique may be employed to automatically inspect all inspection items.

That is, in a state where a number of still cut folders are accumulated, the quality of the coil is automatically determined by comparing the still cuts of the target coil with the still cuts of the folders whose specifications and inspection items match the current target coil specifications. .

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it should be understood that the scope of the present invention extends to those within the scope substantially equivalent to the embodiments of the present invention. Various modifications and implementations are possible by those skilled in the art to which the invention pertains without departing from the spirit of the invention.

10: remote shooting department
11: CCTV camera 12: repeater
13: Recorder
14: joystick
20: Close-up shooting department
21: vision camera 22: robot unit
221: transfer cylinder 222: rotary cylinder
30: lower PLC
40: data processing unit
41: PC 42: display unit

Claims (6)

At least one CCTV camera 11 for taking remote video using a zoom function, a repeater 12 for distributing the remote video to the recorder 13 and the PC 41, and the remote video distributed from the repeater 12 a remote photographing unit 10 including a recorder 13 for storing;
a short-distance photographing unit 20 provided at a plurality of locations of the coil transfer line and composed of a vision camera 21 for capturing a close-up video and a robot unit 22 to which the vision camera 21 is mounted;
Information on the coil to be inspected is received from the upper PLC (A) that controls the maintenance equipment of the transfer line, and based on this, the CCTV camera 11, the vision camera 21, and the robot unit 22 are controlled to inspect the packaging quality. A lower PLC (30) for shooting remote and close-up videos suitable for; and
A PC 41 having a built-in program for creating and managing remote and close-up still-cuts from the remote and close-up videos, and displaying pavement inspection-related information provided by the PC 41 including the remote and close-up videos a data processing unit 40 consisting of a display unit 42;
made up of,
The data processing unit 40 displays the remote video and proximity video provided by the CCTV camera 11 and the vision camera 21 on the display unit 42 in real time, and then wraps the coil after the coil stops at a predetermined position on the transfer line. At a plurality of specific points in the process, a steel cut of the designated coil part is created according to the inspection item, and the created steel cut is saved in a designated folder under a designated name, so that it can be checked whether the coil packaging process has been properly performed. Coil packaging inspection system, characterized in that.
According to claim 1,
A coil packaging inspection system, characterized in that an entry vision camera 21' capable of entering the coil hollow and photographing the entire inner circumference of the short-range imaging unit 20 and a rotation cylinder 222 coupled thereto are additionally mounted .
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The data processing unit 40 counts the number of stickers contained in the still cut, compares it with the information obtained from the upper PLC (A), and processes the result to be displayed on the monitor of the display unit 42, so that the inspection is performed Characterized by coil packaging inspection system. delete delete

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