KR101767759B1 - Apparatus and Method for measuring form and surface of slab - Google Patents

Apparatus and Method for measuring form and surface of slab Download PDF

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Publication number
KR101767759B1
KR101767759B1 KR1020150183252A KR20150183252A KR101767759B1 KR 101767759 B1 KR101767759 B1 KR 101767759B1 KR 1020150183252 A KR1020150183252 A KR 1020150183252A KR 20150183252 A KR20150183252 A KR 20150183252A KR 101767759 B1 KR101767759 B1 KR 101767759B1
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South Korea
Prior art keywords
slab
image
unit
plate
shape
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KR1020150183252A
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Korean (ko)
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KR20170074317A (en
Inventor
조완우
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주식회사 포스코
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/02—Profile, e.g. of plate, hot strip, sections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/12—Circuits of general importance; Signal processing
    • G01N2201/126—Microprocessor processing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Immunology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Quality & Reliability (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The apparatus for measuring the shape and surface of a slab for loading a heavy plate according to an embodiment of the present invention includes a 2D scanner unit for providing a 2D scan image of a side surface shape of a slab moving to a heating furnace; An image photographing unit for processing a photographed image of the upper side and the lower side of the work side (W / S) and the drive side (D / S) of the slab and providing the photographed image as a panoramic image; And a plate tilt measuring unit for measuring plate tilt information of the slab, wherein a position of the 2D scanner unit and a position of the image photographing unit are variable according to the plate tilt information.

Figure R1020150183252

Description

Technical Field [0001] The present invention relates to an apparatus and a method for measuring a shape and a surface of a slab,

The present invention relates to an apparatus and a method for measuring a shape and a surface of a slab charged in a thick plate heating furnace.

The steel plate process is the process of refining the steel wire in the steelmaking process, producing the slab in the casting process, and then rolling the steel plate to produce the steel plate.

The slabs produced in the casting process are placed on a yard, heated in a heating furnace, heated and rolled to produce plates.

Slabs are transported from the yard through a file conveyor and roller table, and then into the furnace.

Before entering the heating furnace, slabs are visually inspected on the surface and markings in the patrol type in case of an operator in case of need, and there are various problems in quality and logistics due to limit of slab shape and surface condition analysis.

First, the quality problems caused by insufficient slab shape and surface state analysis are as follows.

Upper and lower asymmetry of the slab occurs due to the use of an elongated mold shape in the plate-making. As a result, dimensional defects occur during rolling, resulting in a decrease in the recovery rate.

In addition, edge cracks and burrs of the slab are mixed at the time of rolling so that the scab and the hot foreign matter are scratched on the plate.

It is difficult to check which slab is entering before entering the heating furnace, so that there is a case where the slab information coming from the actual upper control level and the spot are inconsistent and the wrong product is supplied.

In spite of this situation, the existing slab in the heating furnace temporarily undergoes a visual inspection of only a few slabs as a follow-up concept in the event of a quality or logistics problem.

Korean Patent Laid-Open Publication No. 10-2012-0096997 (Title: Slab Measuring Apparatus)

An object of the present invention is to provide an apparatus and a method for measuring the shape and surface of a slab charged in a hot plate furnace, which can prevent the occurrence of a large quality beforehand by measuring the shape and surface of the slab before entering into the furnace.

In addition, the present invention monitors slab quality before entering a heating furnace, determines whether or not the slab is fed into a heating furnace, and prevents quality non-conformity in advance, so that the information is reflected in slab production The present invention also provides an apparatus and a method for measuring the shape and surface of a slab, which can be improved.

That is, the present invention improves slab quality by analyzing based on the measured data, and detects slabs with poor quality before rolling to prevent cracks, foreign material scratches, It is aimed to prevent quality problems caused by insufficient analysis of slab shape and surface condition to be loaded into a heating furnace and logistics accidents caused by inconsistency between slabs and data.

The apparatus for measuring the shape and surface of a slab for loading a heavy plate according to an embodiment of the present invention includes a 2D scanner unit for providing a 2D scan image of a side surface shape of a slab moving to a heating furnace; An image photographing unit for processing a photographed image of the upper side and the lower side of the work side (W / S) and the drive side (D / S) of the slab and providing the photographed image as a panoramic image; And a plate tilt measuring unit for measuring plate tilt information of the slab, wherein a position of the 2D scanner unit and a position of the image photographing unit are variable according to the plate tilt information.

The shape and surface measuring method of a slab for loading a heavy plate according to an embodiment of the present invention includes: a first step of calculating plate stuck information of a slab moving to a heating furnace; A second step of providing a 2D scan image in which the 2D scanner unit measures the side shapes of the work side (W / S) and the drive side (D / S) of the slab based on the plate stall information; (W / S) and a drive side (D / S) of the slab moving from the image photographing unit to the heating furnace, and then photographing the photographed image as a panoramic image A third step; A fourth step of detecting surface defects on the top surface and the bottom surface of each of the taper angle of the side surface shape of the slab, the work side of the slab, and the drive side (D / S) based on the 2D scan image and the panoramic image; A fifth step of displaying the resultant value detected in the fourth step to the user in 2D or 3D form, and a fifth step of displaying the resultant value in a 2D or 3D form to the user, , Or a scrap process (step 6).

According to the present invention, the slab surface and shape can be analyzed in the performance process to improve the slab casting width deviation, thereby making it possible to establish the basis for slab quality improvement and to improve the shape and surface quality of the rolled- And the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an apparatus view showing a slab shape and surface measuring apparatus according to an embodiment of the present invention; FIG.
2 is an exemplary view showing the operation of the 2D scanner unit shown in FIG.
3 is another exemplary diagram showing the operation of the 2D scanner unit shown in FIG.
FIGS. 4 to 6 are still another example of the operation of the 2D scanner unit shown in FIG. 1. FIG.
7 is a flowchart illustrating a method of measuring a shape and a surface of a slab according to an embodiment of the present invention.
8 is a flowchart of S740 shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals are used throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

Hereinafter, an apparatus and method for measuring the shape and surface of a slab according to an embodiment of the present invention will be described in detail with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating an apparatus for measuring a shape and a surface of a slab according to an embodiment of the present invention. FIG.

1, an apparatus 100 for measuring the shape and surface of a slab according to an exemplary embodiment of the present invention includes a 2D scanner unit 110, an image capturing unit 120, and a plate- can do.

The 2D scanner unit 110 includes a first scanner 111 and a second scanner 112. Each scanner performs a function of providing a 2D scan image in which a side surface shape of a slab moving to a heating furnace is scanned .

The image photographing unit 120 processes the photographed images of the upper and lower surfaces of the work side (W / S) and the drive side (D / S) of the slab and provides them as panoramic images.

The plate-placing measuring unit 130 measures plate-spreading information of the slab.

Here, the position of the 2D scanner unit and the position of the image capturing unit may be varied according to the plate spreading information.

The slab shape and surface measurement apparatus 100 according to an exemplary embodiment of the present invention may further include a control unit 140 and a display unit 150. The control unit 140 and the display unit 150 Will be described later.

More specifically, FIG. 2 illustrates an operation of the 2D scanner unit shown in FIG. 1, and FIG. 3 illustrates another exemplary operation of the 2D scanner unit shown in FIG. 1, wherein the first scanner 111 The second scanner 112 provides a 2D scan image obtained by scanning the side surface of the drive side (D / S) of the slab, and provides a 2D scan image obtained by scanning the side surface of the work side W / S of the slab. do.

At this time, the first scanner 111 and the second scanner 112 scan side shapes while maintaining a certain distance from the side surfaces of the slabs. If the slabs move along the transfer table, (See FIGS. 2 and 3) in order to keep a certain distance from the side face of the slab when the plate is moved in the drive side (D / S) direction or the drive side (D / S) direction. At this time, the forward and backward movements are operated on the basis of the plate spreading information provided by the plate spread measuring unit.

FIGS. 4 to 6 are still another example of the operation of the 2D scanner unit shown in FIG. 1. FIG.

4 to 6, when the slabs to be conveyed along the conveying table 10 are moved to a shape such as A, B, and C at a position where the 2D scanner units 111 and 112 are located, The first scanner 111 and the second scanner 112 repeat the advancing and retracting operations based on the plate-spreading information (the leaning direction and the leaning distance).

Through the forward and backward movement as described above, the 2D scanner units 111 and 112 can always provide constant side-slab information of the slab irrespective of plate stiffness.

1, the image capturing unit 120 includes a side upper surface and a lower side surface of each of a work side (W / S) and a drive side (D / S) of the slab moving to the heating furnace And performs a function of providing the photographed image as a panoramic image

More specifically, the image capturing unit 120 includes a first camera 121, a second camera 122, a third camera 123, and a fourth camera 124, and the first camera 121, And the second camera 122 photographs the lower surface of the work side of the slab. In addition, the third camera 123 photographs the upper side of the drive side of the slab, and the fourth camera 124 photographs the lower side of the drive side of the slab.

For example, the first camera 121 to the fourth camera 124 may be a CCD (charge coupled device) image sensor or a CMOS (complimentary metal-oxide semiconductor) image sensor.

Similarly to the operation of the 2D scanner unit 110, based on the plate solving information, each of the cameras 121, 122, 123, and 124 in the image photographing unit 120 also receives the slab S from the transfer table 10, when the plate is moved in the direction of the work side (W / S) or the drive side (D / S), the slider advances and retreats in the width direction so as to maintain a certain distance from the slab.

Next, the plate-placing measuring unit 130 includes a photographing unit 131 and a plate-positioning information calculating unit 132. The plate-

The photographing unit 131 photographs a width image of the slab, and the plate-spreading information calculating unit 132 compares the width image of the slab with the first reference image to obtain plate-spread information (for example, a leaning direction and a leaning distance) And provides it to the 2D scanner unit 110 and the image capturing unit 120.

Here, the photographing unit 131 may be a CCD (charge coupled device) image sensor or a video camera equipped with a complimentary metal-oxide semiconductor (CMOS) image sensor.

Next, the controller 140 performs a function of detecting the degree of taper of the side surface shape of the slab and the surface defects of the side upper surface and the lower side surface of the slab based on the 2D scan image and the panorama image.

More specifically, the control unit 140 may include a first information processing unit 141 and a second information processing unit 142.

The first information processing unit 141 compares the 2D scan image with the second reference image to calculate taper information of the side surface shape of the slab.

The second information processing unit 142 detects the position of the surface defects generated on the upper and lower surfaces of the work side (W / S) and the drive side (D / S) of the slab based on the brightness of the panoramic image As shown in FIG.

The display unit 150 displays the result of the controller 140 in a 2D or 3D form to the user.

The display unit 150 may be implemented as various types of displays such as a liquid crystal display (LCD), an organic light emitting diode (OLED) display, and a plasma display panel (PDP). A driving circuit, a backlight unit, and the like, which can be implemented in the form of an a-si TFT, a low temperature poly silicon (LTPS) TFT, an OTFT (organic TFT)

7 is a flowchart illustrating a method of measuring a shape and a surface of a slab according to an embodiment of the present invention.

As shown in FIG. 7, the shape and surface measurement method (S700) of the slab according to an embodiment of the present invention may include a first step (S710) to a fifth step (S740).

The first step S710 is a step of providing plate-spreading information of the slab. The plate-spread measuring unit 130 compares the width image of the slab with the first reference image to obtain plate-spread information (for example, ) To the scanner unit 110 and the image capturing unit 120. [0031]

In the second step S720, the 2D scanner unit 110 measures the side shapes of the work side (W / S) and the drive side (D / S) of the slab S on the basis of the plate- And providing a 2D scan image.

At this time, the first scanner 111 and the second scanner 112 of the 2D scanner unit 110 scan a side shape while maintaining a certain distance from the side surface of the slab S, and if the slab S In order to maintain a certain distance from the side surface of the slab S when the slab S moves in the direction of the work side W / S or the drive side D / And the forward and backward movements are operated according to the leaning direction and the leaning distance in the plate landing information.

Next, in the third step S730, the upper side surface and the lower side surface of the work side (W / S) and the drive side (D / S) of the slab moving from the image pickup unit 120 to the heating furnace The cameras 121, 1223, and 124 in the image capturing unit 120 are configured to move the slabs in the same manner as the operation of the 2D scanner unit, When moving along the table, if the plate is moved in the direction of the work side (W / S) or the drive side (D / S), advance and backward movements are performed in the width direction of the slab so as to maintain a certain distance from the slab.

In the fourth step S740, based on the 2D scan image and the panorama image, the degree of taper of the side surface shape of the slab, the upper surface of each of the work side of the slab and the drive side (D / S) And detecting the defect.

More specifically, FIG. 8 is a flowchart of S740 shown in FIG. 7. In the fourth step S740, the taper degree of the side surface shape of the slab is calculated by comparing the 2D scan image provided in S720 with the second reference image S741), the position of the surface defects generated on the upper and lower surfaces of the work side (W / S) and the drive side (D / S) of the slab is detected based on the brightness of the panoramic image provided in S730 (S742).

The fifth step S750 may be a step of displaying the resultant value detected in S740 to the user in 2D or 3D form.

In the sixth step S760, the system determines whether the slab surface and shape are summed or not in the system through the detection result. When the slab surface and shape are determined to be not acceptable, the defective slab in the roller table is interlocked with the crane, And may determine whether the operator who receives the alarm determines whether or not to use the slab by determining whether the operator is scaping or scrapping.

Therefore, the shape and surface analysis measurement and method of a slab according to an embodiment of the present invention are utilized to improve a slab casting width deviation by analyzing a slab surface and a shape in a performance process, It is possible to establish the basis of quality improvement and to provide an advantage that the shape and surface quality of the rolled plate can be improved.

For reference, "part" of the present invention may be a computing device, and the computing device may include at least one processing unit and memory.

The processing unit may include a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) And may have a plurality of cores.

The memory may be a volatile memory (e.g., RAM, etc.), a non-volatile memory (e.g., ROM, flash memory, etc.), or a combination thereof.

The computing device may also include additional storage. Storage includes, but is not limited to, magnetic storage, optical storage, and the like.

The storage may store computer readable instructions for implementing one or more embodiments disclosed herein, and may also store other computer readable instructions for implementing an operating system, application programs, and the like. The computer readable instructions stored in the storage may be loaded into memory for execution by the processing unit.

On the other hand, a computing device may include communication connection (s) that enable it to communicate with other devices through the network. Here, the communication connection (s) may include a modem, a network interface card (NIC), an integrated network interface, a radio frequency transmitter / receiver, an infrared port, a USB connection or other interface for connecting a computing device to another computing device . The communication connection (s) may also include wired connections or wireless connections.

Each component of the computing device described above may be connected by various interconnects (e.g., peripheral component interconnect (PCI), USB, firmware (IEEE 1394), optical bus architecture, etc.) As shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made without departing from the scope of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but are intended to illustrate and not limit the scope of the technical spirit of the present invention. The scope of protection of the present invention should be construed according to the claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

100: Slab shape and surface measuring device
110: scanner part
120:
130:
131:
132: Platemaking information calculating section
140:
141: First information processor
142: second information processor
150:

Claims (6)

A 2D scanner unit for providing a 2D scan image obtained by scanning a side surface shape of a slab moving to a heating furnace;
An image photographing unit for processing a photographed image of the upper side and the lower side of the work side (W / S) and the drive side (D / S) of the slab and providing the photographed image as a panoramic image; And
And a plate tilt measuring unit for measuring plate tilt information of the slab,
Wherein the position of the 2D scanner unit and the position of the image capturing unit are varied according to the plate-
Wherein the control unit controls the operation of the 2D scanner unit and the image capturing unit and controls the driving of the 2D scanner unit and the panoramic image based on the taper information of the side surface shape of the slab and the top surface and the bottom surface of the work side and drive side of the slab, Further comprising a control section for detecting a surface defect position,
Wherein,
A first information processing unit for comparing the 2D scan image with a second reference image to calculate a degree of taper of a side surface shape of the slab; And
(W / S) and a drive side (D / S) of the slab based on the brightness of the panoramic image The shape of the slab and the surface measuring device.
The method according to claim 1,
And a display unit for displaying the result of the control unit to the user in 2D or 3D form.
The method according to claim 1,
The plate-
A photographing unit photographing a width image of the slab; And
And compares the width image with a reference image to calculate the plate-spreading information including the direction and the distance to which the slab is deviated.
delete A first step of calculating plate stuck information of a slab moving to a heating furnace;
A second step of providing a 2D scan image in which the 2D scanner unit measures the side shapes of the work side (W / S) and the drive side (D / S) of the slab on the basis of the plate-
(W / S) and a drive side (D / S) of the slab moving from the image photographing unit to the heating furnace, and then photographing the photographed image as a panoramic image The third stage
A fourth step of detecting surface defects on the top surface and the bottom surface of each of the taper angle of the side surface shape of the slab, the work side of the slab, and the drive side (D / S) based on the 2D scan image and the panoramic image;
A fifth step of displaying the resultant value detected in the fourth step to the user in 2D or 3D form; And
And a sixth step of judging whether or not to perform junk carving or scrapping if the surface of the slab is defective and the crane is connected to the defective slab mounting space of the yard,
In the fourth step,
A first information processing step of calculating a degree of taper of a side surface shape of the slab by comparing the 2D scan image with a reference image; And
And a second information processing step of detecting the positions of surface defects generated on the upper and lower surfaces of the work side (W / S) and the drive side (D / S) of the slab based on the brightness of the panoramic image The shape of the slab and the method of measuring the surface. delete
KR1020150183252A 2015-12-21 2015-12-21 Apparatus and Method for measuring form and surface of slab KR101767759B1 (en)

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