TWI751079B - Defect alarm system and defect alarm method for surface quality of steel coil - Google Patents

Abstract

A defect alarm system for surface quality of a steel coil is provided, which includes a surface inspection system, a server, and an inspection stage. The surface inspection system inspects a steel strip based on an order for generating defect coordinates and defect images corresponding to the defect coordinates. The steel strip is used to form the steel coil. The server is communicatively connected to the surface inspection system, and the server includes a data base for storing the defect images and the defect coordinates. The inspection stage has a computer system which is communicatively connected to the server. The steel coil is uncoiling to the steel strip. The computer system provides a user interface for showing the defect images based on the order reversely and showing location marks based on the defect coordinates.

Description

Steel coil surface quality defect early warning system and defect early warning method

The present disclosure relates to a defect early warning system, especially a defect early warning system applied to the surface quality of a steel coil, and a defect early warning method using the defect early warning system.

The two main functions of steel rolling are to roll the steel billet into the required dimensions of the final product, such as thickness, length and width, and to refine the rough solidified structure of the steel billet and improve the surface quality. In the process, it is divided into hot rolling and cold rolling. Generally speaking, the process of cold rolled steel coil is obtained by subjecting hot rolled steel coil to pickling cold rolling, electrolytic cleaning, annealing, quenching and tempering rolling, and finishing. product. However, in the management of the surface quality of the steel coil, the conventional steel coil reprocessing still requires the inspectors to identify and locate the defects by visual inspection before performing the reprocessing, such as cutting. The size and distribution of defects on the surface of the coil are not fixed, which not only causes difficulties and omissions in identification, but also indirectly leads to limited production capacity.

According to the above-mentioned purpose, one aspect of the present disclosure provides a defect early warning system, including a surface quality inspection system, a server, and an inspection station. The surface quality inspection system is used for inspecting the surface of the steel strip according to a sequence to generate a plurality of defect coordinates and a plurality of defect images corresponding to the defect coordinates, and the steel strip is used to form a steel coil; the server system Communication is connected to the surface quality inspection system, the server includes a database for storing the coordinates of these defects and images of these defects; and an inspection station with a computer system, wherein the coil is unwound and passed through the inspection station, and the computer system is connected to the servo The computer system is used for providing a user interface, whereby the defect images are displayed in reverse order and a plurality of positioning marks are displayed according to the defect coordinates.

In some embodiments, the user interface is further used to control the inspection speed of the inspection station and to display the length of the coil to be inspected.

In some embodiments, the user interface is further configured to display a plurality of defect numbers and at least one defect classification corresponding to the defect coordinates.

In some embodiments, the user interface is further used to select a target defect, and the inspection station is used to control the inspection line according to one of the defect coordinates corresponding to the target defect so that the target defect is located on the inspection station.

In some embodiments, the user interface is further configured to select a specific defect classification, and display the defect images with the specific defect classification in reverse order and display the corresponding positioning marks according to the defect coordinates corresponding to the specific defect classification.

In some embodiments, the server further includes a second database for storing the identity information and process information of the steel coil.

In some embodiments, the user interface is further configured to display identity information and process information of the coils inspected by the inspection station.

Another aspect of the present disclosure provides a defect early warning method for a computer system of an inspection station, the defect early warning method includes: detecting the surface of a steel strip according to a sequence through a surface quality detection system to generate a plurality of defect coordinates and corresponding A plurality of defect images to these defect coordinates, and the steel strip is used to form the steel coil; these defect coordinates and these defect images are stored through the database of the server, wherein the steel coil is unwound and passed through the inspection station; and provided for use interface, so that the defect images are displayed in reverse order and a plurality of positioning marks are displayed according to the defect coordinates.

In some embodiments, the defect warning method further includes: selecting a target defect through a user interface, and the inspection station controls the inspection line according to one of the defect coordinates corresponding to the target defect so that the target defect is located on the inspection station .

In some embodiments, the defect warning method further includes: selecting a specific defect classification through a user interface, and thereby displaying the defect images with the specific defect classification and the defects corresponding to the specific defect classification in reverse order. coordinates to display the corresponding positioning marks.

The following disclosure provides many different embodiments or illustrations for implementing different features of the subject matter. The specific illustrations of components and arrangements described below are for the purpose of simplifying the present disclosure. These are, of course, only examples and are not intended to be limiting.

FIG. 1 is a schematic diagram of a steel strip manufacturing end according to some embodiments of the present disclosure. The steel strip production end 110 is used for steel strip production and various treatments. For example, the steel strip production end 110 may include equipment such as a rolling mill, an annealing zone, etc., for performing rolling, galvanizing or annealing processes. After the steel strip is manufactured or processed, the steel strip can be inspected for surface quality by the surface quality inspection system 120 , and the steel strip after the inspection is completed is coiled into a steel coil 130 .

In some embodiments, the surface quality detection system 120 captures the image of the moving steel belt by means of a photosensitive element disposed on the upper and lower surfaces of the steel belt, such as a photosensitive coupled device (Charge-coupled Device; CCD) sensor or Complementary Metal-Oxide Semiconductor (Complementary Metal-Oxide Semiconductor; CMOS) sensor. The surface quality inspection system 120 can automatically identify the defects on the upper and lower surfaces of the steel strip through image processing and image recognition technology, and then classify each defect into its type according to the system pre-defined classification (for example, scratches) and give A defect classification, and generate various information related to defects, such as: defect number (also known as defect number), coordinates (also known as defect coordinates), image (also known as defect image), size, or other similar Information. As shown in FIG. 1 , the surface quality inspection system 120 is communicatively connected to a server 140 , and the server 140 includes a defect database 142 . The surface quality inspection system 120 can transmit the above-mentioned various information related to defects to the server 140 and store them in the defect database 142 .

As shown in FIG. 1 , the server 140 further includes a process parameter database 144 for storing the identification information and process information of the steel strip, such as the code, state, steel type, speed, width, length, or other information of the steel strip. similar information.

As shown in FIG. 1 , after the steel strip manufacturing end 110 completes the steel strip manufacturing and processing, the steel strip will pass the surface quality inspection system 120 for surface quality inspection, and a plurality of defects D1, D2 . . . Dn will be generated in sequence, and then the steel strip will be Coiled into coils 130 and discharged. Therefore, the defect D1 detected first will be located in the innermost circle of the steel coil 130 , and the defect Dn detected last will be located in the outermost circle of the steel coil 130 .

In some embodiments, the quality control personnel will determine whether to re-inspect the defect. If so, the steel coil 130 will be sent to the inspection line 200 for re-inspection. The inspection line 220 will be further described below.

FIG. 2 is a schematic diagram of a test line 200 according to some embodiments of the present disclosure. The inspection line 200 includes an inspection station 210 , a feeding module 230 , and a discharging module 240 . In some embodiments, the infeed module 230 may include an unwinder, a magnetic conveyor belt, an inlet side nip roll, a leveler, a thickness gauge, an inlet side shearer, etc., and the outfeed module 240 may include an outlet side Shears, exit-side nip rolls, rewinders, etc., but for the sake of simplicity, all equipment of the inspection line 200 is not shown in FIG. 2 . When the steel coil 130 is determined to be re-inspected, the steel coil 130 is uncoiled into a steel strip by the feeding module 230 and passed through the inspection station 210 for re-inspection. The inspection station 210 can be used for horizontal inspection or vertical inspection. The present disclosure Not limited to this, after the re-inspection is completed, the steel strip will be re-coiled into a steel coil by the discharging module 240 and discharged. Therefore, when the steel coil 130 is uncoiled into a steel strip, the defect Dn located in the outermost circle of the steel coil 130 will pass through the inspection station 210 first, and the defect D1 located in the innermost circle of the steel coil 130 will pass through the inspection station 210 last. . For example, the surface quality inspection system 120 detects defects D1, D2...Dn-1, and Dn in sequence on the steel strip, and conversely, the defects on the steel strip are in the order of Dn, Dn-1...D2, and D1 Pass inspection station 210 . Therefore, the re-inspection sequence for defects of the coil 130 is reversed from the sequence in which the defects were detected at the coil manufacturing end.

As shown in FIG. 2 , the inspection station 210 further includes a computer system 220 , and the computer system 220 is communicatively connected to the server 140 . The computer system 220 is used for accessing the defect information in the defect database 142 and the process information and identity information in the process parameter database 144 , and displaying the information on the computer system 220 . When the defects on the steel strip pass through the inspection station 210 in the order of Dn, Dn-1...D2, and D1 in sequence, the computer system 220 also synchronously displays the defect information of Dn, Dn-1...D2, and D1 in sequence, Such as coordinates, categories, and images. In addition, the operator can control the inspection line 200 through the computer system 220 to move a specific position of the steel strip to the inspection station 210 . In this way, the user can compare the defects on the steel strip with the defect information displayed by the computer system 220 with the assistance of the computer system 220, so as to achieve the purpose of accurately identifying the defects and locating the defects.

FIG. 3 is a schematic diagram of a user interface 300 according to some embodiments of the present disclosure. The computer system 220 can further provide a user interface 300 for displaying defect information and process information of the steel coil under re-inspection, and controlling the inspection line 200 through the user interface 300 . As shown in FIG. 3, the user interface 300 includes a plurality of fields, wherein the field 310 can display the process information of the steel coil, the field 330 can display the schedule, the field 340 can display the defect distribution map, and the field 350 can display Defect information, and fields 360, 370 may display defect images.

In some embodiments, the process information displayed in the field 310 may include identification information (eg, code), status, steel grade, speed, width, length, or other similar information of the steel strip. The field 310 can further display the length of the steel strip to be inspected and the current position of the steel strip on the inspection station 210, such as length or width. The schedule displayed in the field 330 is the identification information of the coils that must be re-inspected sent from other computer systems (not shown) connected to the computer system 200, and may also include coils that have been re-inspected. The defect information displayed in the field 350 may include defect number, defect coordinates, defect classification, dimensions, comments, and other related information.

In some embodiments, the defect distribution map displayed in the field 340 graphically displays the distribution state of defects on the steel strip, which can assist the user to quickly and accurately find the target defect on the steel strip. The user interface 300 can convert the coordinate positions of the defects and related information to represent the position of each defect on the steel strip and the relative relationship between the positions of each defect in a manner similar to a plane map. For example, the field 340 further includes sub-fields 341-344, wherein the sub-field 341 is used to display the defect distribution state on the upper surface of the complete steel strip according to the defect coordinates, and the position where the defect exists is displayed as a positioning mark (ie, Fig. A star-shaped symbol); similarly, the sub-column 343 shows the defect distribution state of the lower surface of the complete steel strip according to the defect coordinates, and the position where the defect exists also shows the positioning mark. In addition, the parts of the steel strip currently positioned on the inspection station 210 are marked with oblique lines or other conspicuous manners, such as the real-time positions P1 and P2 in FIG. 3 . The real-time positions P1 and P2 will move in the sub-field 341 and the sub-field 343 synchronously with the inspection line 200 to graphically display that the part of the steel strip inspected by the current inspection station 210 is located in the complete steel strip. which segment. The sub-field 342 is used to zoom in and display the real-time position P1, and similarly, the sub-field 344 is used to zoom in and display the real-time position P2. Therefore, the sub-field 342 and the sub-field 344 also display the enlarged map correspondingly with the movement of the real-time positions P1 and P2. In addition, the column 360 and the column 370 are used to display the defect images corresponding to each defect in the real-time positions P1 and P2.

In some embodiments, the computer system 220 can automatically control the inspection speed of the inspection station 210 according to the distribution state of the defects. The inspection speed is controlled, and the inspection line 200 is controlled to reduce the inspection speed of the inspection station 210 in the area with more defects, so as to improve the production capacity.

In some embodiments, the user can select a target defect on the user interface 300 provided by the computer system 220, and then the computer system 220 sends the defect coordinates of the target defect and other related information to the inspection station 210, and the inspection station 210 The inspection line 200 can be controlled to move the portion of the steel strip where the target defect is located to the inspection station 210, and the user interface 300 also simultaneously displays the defect information and process information of the target defect.

In some embodiments, the user may select a specific defect classification on the user interface 300 provided by the computer system 220, and display the defects in an order opposite to that detected by the surface quality inspection system 120 at the steel strip manufacturing end. The defect image of this specific defect classification and the corresponding positioning marks are displayed according to all defect coordinates corresponding to the specific defect classification. For example, if a specific defect category includes defect D1 and defect D2, only the positioning marks of defect D1 and defect D2 will be displayed in fields 341 and 342, and only the positioning marks of defect D1 and field 370 will be displayed in fields 360 and 370. Defect images of Defect D1 and Defect D2.

It is worth mentioning that the user interface shown in FIG. 3 is only an example. Those skilled in the art can modify the above content to design other interfaces. The present disclosure does not limit the layout of the user interface. In addition, the various information displayed on the user interface mentioned above may be represented by text, graphics, symbols or any other manner, which is not limited in the present disclosure.

FIG. 4 is a flowchart of a defect warning method 400 according to some embodiments of the present disclosure. In operation 410, the computer system 220 inspects the surface of the steel strip according to a sequence through the surface quality inspection system 120 to generate a plurality of defect coordinates and a plurality of defect images corresponding to the defect coordinates, wherein the steel strip is used to form a steel coil 130.

In operation 420 , the computer system 220 stores the defect coordinates and defect images through the defect database 142 of the server 140 , wherein the steel coil 130 passes through the inspection station 210 after being unwound.

In operation 430, the computer system 220 provides the user interface 300, and the user interface 300 displays the defect images in a sequence opposite to that described in operation 310, and displays a plurality of positioning marks according to the defect coordinates.

In some embodiments, the defect warning method 400 can further select a target defect through the user interface 300 , and the inspection station 210 controls the inspection line 200 according to the defect coordinates corresponding to the target defect so that the target defect is located on the inspection station 210 .

In some embodiments, the defect warning method 400 may further select a specific defect classification through the user interface 300 , and display the defect images with the specific defect classification through the user interface 300 in an order opposite to that described in operation 310 , and display a plurality of corresponding positioning marks according to the defect coordinates corresponding to the specific defect classification.

The foregoing summarizes the features of many embodiments so that those of ordinary skill in the art may better understand aspects of the present disclosure. Those skilled in the art should also understand that the equivalent structure does not deviate from the spirit and scope of the present disclosure, and can make various changes, exchanges and substitutions without departing from the spirit and scope of the present disclosure.

110: Steel strip manufacturing end

120: Surface Quality Inspection System

130: Steel Coil

140: Server

142: Defect Database

144: Process parameter database

200: Inspection line

210: Inspection Station

220: Computer Systems

230: Feeding module

240: Discharge module

300: User Interface

310, 330, 340, 350, 360, 370: Fields

400: Method

410, 420, 430: Operation

D1, D2, Dn-1, Dn: Defects

P1, P2: instant location

Aspects of the present disclosure will be better understood from the following detailed description read in conjunction with the accompanying drawings. It should be noted that, as is standard practice in the industry, many features are not drawn to scale. In fact, the dimensions of many features can be arbitrarily scaled for clarity of discussion. FIG. 1 is a schematic diagram of a steel strip manufacturing end according to some embodiments of the present disclosure. FIG. 2 is a schematic diagram of inspection lines according to some embodiments of the present disclosure. FIG. 3 is a schematic diagram of a user interface according to some embodiments of the present disclosure. FIG. 4 is a flowchart of a defect warning method according to some embodiments of the present disclosure.

Domestic storage information (please note in the order of storage institution, date and number) none Foreign deposit information (please note in the order of deposit country, institution, date and number) none

130: Steel Coil

140: Server

142: Defect Database

144: Process parameter database

200: Inspection line

210: Inspection Station

220: Computer Systems

230: Feeding module

240: Discharge module

D1, D2, Dn-1, Dn: Defects

Claims (8)

A defect early warning system, comprising: a surface quality inspection system for inspecting the surface of a steel strip according to a sequence to generate a plurality of defect coordinates and a plurality of defect images corresponding to the coordinates, wherein the steel strip is used to form a steel coil; a server, communicatively connected to the surface quality inspection system, the server includes a database for storing the defect coordinates and the defect images; and an inspection station including a computer system , wherein the coil is passed through the inspection station after being unwound, the computer system is communicatively connected to the server, the computer system is used to provide a user interface whereby the defect images are displayed in reverse to the order and based on the The defect coordinates display a plurality of positioning marks, wherein the user interface is further used to select a target defect, and the inspection station is used to control an inspection line according to one of the defect coordinates corresponding to the target defect so that the target defect is located at at the inspection station. The defect early warning system of claim 1, wherein the user interface is further used to control an inspection speed of the inspection station and display a length to be inspected of the steel coil. The defect early warning system of claim 2, wherein the user interface is further configured to display a plurality of defect numbers and at least one defect classification corresponding to the defect coordinates. The defect early warning system of claim 3, wherein the user interface is further configured to select a specific defect classification, and display the defect images with the specific defect classification in reverse order and according to the data corresponding to the specific defect classification The defect coordinates show the corresponding positioning marks. The defect early warning system of claim 1, wherein the server further comprises a second database, wherein the second database is used to store an identity information and a process information of the steel coil. The defect early warning system of claim 5, wherein the user interface is further configured to display the identity information and the process information of the steel coil inspected by the inspection station. A defect early warning method is used for a computer system of an inspection station. The defect early warning method includes: detecting the surface of a steel strip according to a sequence through a surface quality detection system to generate a plurality of defect coordinates and corresponding to the coordinates. a plurality of defect images, wherein the steel strip is used to form a steel coil; storing the defect coordinates and the defect images through a database of a server, wherein the steel coil is unwound and passed through the inspection station; providing a a user interface, whereby the defect images are displayed in reverse order and a plurality of positioning marks are displayed according to the defect coordinates; and a target defect is selected through the user interface, and the inspection station is based on the defects corresponding to the target defect One of the coordinates controls a check line so that The target defect is located on the inspection station. The defect warning method according to claim 7, further comprising: selecting a specific defect classification through the user interface, and thereby displaying the defect images with the specific defect classification in the reverse order and according to corresponding to the specific defect The classified defect coordinates show the corresponding positioning marks.

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