CN107790661B - A kind of continuous casting square billet corner defect automatic early-warning system and method - Google Patents
A kind of continuous casting square billet corner defect automatic early-warning system and method Download PDFInfo
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- CN107790661B CN107790661B CN201610784616.1A CN201610784616A CN107790661B CN 107790661 B CN107790661 B CN 107790661B CN 201610784616 A CN201610784616 A CN 201610784616A CN 107790661 B CN107790661 B CN 107790661B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
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Abstract
A kind of continuous casting square billet corner defect automatic early-warning system, including image acquisition units, casting stream tracking cell, analysis and processing unit, alarm indication unit and storage recording unit, it is characterized in that, image pick-up card is used to carry out vision signal high-speed sampling and completes digitlization conversion, the accessible digital image information of analysis and processing unit is formed.Utilize technical solution provided by the present invention, timeliness validity with early warning is strong, it is reliable for operation at low cost, the characteristics of not interfered by false signals such as iron scales, automatic early-warning can be realized early stage the formation of continuous casting square billet corner defect, provide a kind of effective means for the exception monitoring and quick processing of casting machine state；The occurrence risk of the bulk corner mass defect of continuous casting billet can be effectively reduced, help to improve lumber recovery, reduce product quality loss.
Description
Technical field
The present invention relates to the monitoring of steel industry continuous casting process and control technology fields, in particular it relates to a kind of company
Cast square billet corner defect automatic early-warning system and method.
Background technique
Cooled and solidified process of the steel stream in conticaster is the key that form high quality continuous casting billet.In steel-making continuous casting technique
In, liquid molten steel is condensed into thick with certain green shell by primary cooling and two cold house's spraying racks the secondary cooling of crystallizer
The slab of degree and shape.In continuous casting actual production process, due to being influenced by casting machine working condition, if crystallizer is worn, spray
Drench frame leak, the factors such as spray nozzle clogging influence, high-temperature steel stream when by crystallizer and spray system, can due to inhomogeneous cooling and
Crack equal surface quality defects.For section configuration be rectangular continuous casting billet for, due to folding corner region setting rate compared with
Fastly, slab corner was easy cold events and generates tensile stress, if there is the influence of the factors such as leak in casting machine at this time, continuous casting billet is in comer area
Domain is easy for that the mass defects such as crackle occur.The corner defect that continuous casting billet is formed in continuously casting production process, if can not and
When be detected and discovery, will be easy to generate bulk mass defect, and next procedure can be flowed into having no to discover and carried out
Rolling, seriously affects the lumber recovery and product quality for rolling rear product, causes the product quality loss that steel mill is bulk.
Currently, the monitoring of continuous casting blank surface defects is divided into personal monitoring and automatic monitoring.Very due to online continuous casting blank temperature
Height, personal monitoring can only carry out offline visual inspection to offline base, and not only labor efficiency is low, omission factor is high, but also lag time is long, holds
Easily cause the risk of bulk mass defect outburst.And the automatic monitoring of continuous casting blank surface defects is worldwide still one big
Difficult point, main difficulty are: 1) online casting billet surface reaches 500-1000 degree high temperature, and the defect-detecting equipments such as conventional ultrasound, vortex are difficult to
Short distance continuous work；2) often there are a large amount of iron scales or the covering of covering slag residue in continuous casting billet surface, causes surface defect difficult
Effectively to identify；3) conticaster is restricted by stream spacing limitation, detection device mounting arrangements；4) surface defect of continuous casting billet
Pattern often gradually shows in cooling procedure, even can just expose in rolling sometimes, causes on-line monitoring validity comparison
It is low；
Some researchs concentrate in form and depth recognition after being formed to surface defect of bloom at present, for example, retrieving
Patent No. CN201210041430.9 a kind of high-temperature continuous casting blank surface defect online test method and device, propose use
The detection of high pressure argon gas descaling device, structure light laser generator, Array CCD Camera, slab detection device cabin composition fills
Set, come to high temperature surface defect of bloom form and depth detect；The high temperature of Patent No. CN200910190875.1 connects
Surface defect of bloom form and depth on-line lossless detection method are proposed by more laser interference imagers of installation, continuously
Interference imaging is carried out to the high temperature slab transverse direction of movement, obtains distance dot matrix HSB X-Y scheme；Pass through the dot matrix HSB that adjusts the distance
X-Y scheme carries out image procossing, completes the on-line measurement of high temperature surface defect of bloom form and depth.
The above research lays particular emphasis on the form after being formed to surface defect of bloom and depth identifies and judges, to reduce
The influence of the false signals such as iron scale interference；However since the covering of casting billet surface cannot completely remove, surface defect of bloom
Pattern shows the limitation in the presence of uncertain and scheme itself, causes the timeliness of online detection continuous casting blank surface defects at present
It is generally lower with validity.
The publication retrieved above is different from the technical solution in application scheme, not yet finds and retrieves at present
The open source literature and application report similar to same technical scheme.
Summary of the invention
It is an object of the present invention to provide a kind of early stage automatic early-warning system and methods of continuous casting square billet corner defect, existing to solve
There is the problem of technology can not carry out early warning to continuous casting square billet corner defect, thus to reduce the bulk corner quality of continuous casting billet
Defect occurrence risk improves lumber recovery, reduces product quality loss and provides safeguard.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of continuous casting square billet corner defect automatic early-warning system, including image acquisition units cast and flow tracking cell, at analysis
Manage unit, alarm indication unit and storage recording unit, which is characterized in that
Image pick-up card is used to carry out vision signal high-speed sampling and completes digitlization conversion, forms analysis and processing unit
Accessible digital image information；
Tracking cell, including the long detection module of casting and process tracking module are flowed in the casting；The long detection module of casting, is logical
The impulse generator that is connected with withdrawal straightening machine live-roller motor shaft is crossed to carry out cast length detection, and by real-time detection to pour
Casting length sends process tracking module to；
The process tracking module, for tracking acquisition casting state, cast length and procedure parameter, automatic Control
Processing unit enter corresponding monitoring state, and to analysis and processing unit provide alarm logging needed for information；
The analysis and processing unit is connected with image acquisition units with casting stream tracking cell respectively, is used for real-time reception figure
As the slab image information that acquisition unit is sent detects window to setting automatically according to the Monitoring instruction that casting stream tracking cell issues
Image in mouthful is analyzed and processed；To the slab corner defect sign identified, issued from trend alarm indication unit abnormal
Alarm signal, and the position occurred to the report of storage recording unit and record slab corner defect sign and casting status information.
A kind of continuous casting square billet corner defect automatic early-warning system according to the present invention, which is characterized in that
Described image acquisition unit, including industrial CCD video camera and image pick-up card；Industrial CCD video camera is furnished with 1 band
The dustproof protecting box of form and a three-dimensional adjustable holder bracket；Video camera is fixed on holder branch in dustproof protecting box
On frame, for the image of continuous acquisition high temperature slab, and vision signal output is formed；
A kind of continuous casting square billet corner defect automatic early-warning system according to the present invention, which is characterized in that
The alarm indication unit includes display and voice guard, and display is for showing collected slab image
It is indicated with abnormal alarm；Voice guard device is for making a sound prompt to monitoring room personnel when receiving alarm signal；
A kind of continuous casting square billet corner defect automatic early-warning system according to the present invention, which is characterized in that
The storage recording unit is used for slab image and exception information when will trigger abnormal alarm, and it is literary that image is recorded
It in part and data file, is stored in big capacity hard disk, the retrieval and inquiry for history alarm.
The present invention provides a kind of continuous casting square billet corner defect automatic early warning method again, comprising the following steps:
6) continuous acquisition is carried out to the slab image in setting visual field section by image acquisition units, and by image information
It is sent into analysis and processing unit；
7) cast length by the long detection module real-time detection slab of casting in casting stream tracking cell in casting machine, and will
It sends process tracking module to；
8) casting state, cast length and process are acquired by the process tracking module real-time tracking in casting stream tracking cell
Parameter, automatic Control processing unit enters corresponding monitoring state, and provides needed for alarm logging to analysis and processing unit
Information；
9) the slab image information that analysis and processing unit real-time reception image acquisition units are sent flows tracking cell according to casting
The Monitoring instruction sent automatically is analyzed and processed the slab image in set detection window on every trajectory road；
10) when analysis and processing unit identifies defect sign, from trend alarm indication unit sending abnormal alarm, and
It stores record in recording unit and saves exception information.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The setting visual field section of the step 1), including longitudinal visual field section and transverse field section, can be adopted by image
Collect installation site and the focal length size of the video camera in unit to set；Longitudinal visual field section includes the outlet of continuous casting two cold room and draws
One section of slab image between the machine of rectifying；Transverse field section includes the left and right corner image of every stream slab.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The long detection module of casting in the step 2) is according to the arteries and veins for opening impulse generator sending when pouring rear withdrawal straightening machine throwing
The speed ratio and roller diameter of number and withdrawal straightening machine live-roller are rushed, to track the generation length for calculating the every stream of casting machine and pouring slab；If pulse is sent out
The resolution ratio of raw device is R, and the speed ratio of live-roller is G, and roller diameter D, the umber of pulse received is N, then the casting of every stream slab is long
Spend L are as follows: L=N*R* (π D/G).
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The process tracking module of the step 3) is the slab head according to representated by the casting state and cast length of casting machine
Tail position starts and stops defect inspection to automatically control analysis and processing unit, and steps are as follows for defect inspection start-up and shut-down control；
3.1) after continuous casting, which is opened, to be poured, add up the variation delta L of cast lengthhead；
3.2) when slab head behind longitudinal visual field section position set by the image acquisition units, i.e. Δ Lhead≥S1, then
Process tracking module issues monitoring enabled instruction from trend analysis and processing unit；Wherein S1Expression, which is opened, pours position to longitudinal visual field section
The length of end；
3.3) after continuous casting pours eventually, add up the variation delta L of cast lengthtail；
3.4) when slab tail portion reach image acquisition units set by visual field section position when, i.e. Δ Ltail≥S2, then process
Tracking module issues monitoring halt instruction from trend analysis and processing unit；Wherein S2Expression, which is opened, pours position to longitudinal visual field section head end
Length.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
Set detection window on every trajectory road in the step 4), including the two hough transform windows in left and right, symmetrically
The both sides of every stream slab image are distributed in, the left and right corner image of every stream slab is separately included, it can be according to locating for slab image
Position and size are adjusted setting.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The analysis and processing unit handles the analysis of slab image, comprising the following steps:
4.1) each pixel value in image is divided into three R (red), G (green), B (indigo plant) primary color components；
4.2) real-time sampling extracts the intensity value of each pixel red component in set detection window on every trajectory road, i.e. R
Component value；
4.3) the R component average value for calculating separately pixel in every trajectory road or so detection window, obtains in left and right window
The average R component of slab corner image.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The identification of the defects of the step 5) sign and alarm, be by left and right detection window slab corner image it is flat
Equal R component is compared with the alarm threshold value of setting, when the R component value of any side detection window is less than the alarm threshold value of setting
Afterwards, system issues corresponding site, corresponding abnormal alarm signal；
The exception information of the record includes the position of the time of defect beginning and end, defect beginning and end point, when
The grade of steel of preceding production, with the positioning searching for the retrospective analysis of mass defect processing and defect material object base.
A kind of continuous casting square billet corner defect automatic early warning method according to the present invention, which is characterized in that
The position of the defect beginning and end point, respectively with starting point and end point of alarming with the length between initial base head
Distance determines；The positioning process step of defect beginning and end point is as follows:
5.1) it presets space coordinate corresponding to every stream picture detection window center line and opens the length poured between position together
Distance L0, it is basically unchanged after the value is determining；
5.2) when system identification, which goes out defect sign, starts alarm, the position of defect starting point is calculated and recorded automatically
Lstart=L1-L0, indicate defect starting point with the length distance between initial base head；Wherein L1Slab for defect start time pours
Cast length；
5.3) at the end of defect sign disappears, alarms, the position L of defect end point is calculated and recorded automaticallyend=
L2-L0, indicate defect end point with the length distance between initial base head；Wherein L2For the slab cast length of defect finish time.
Using technical solution provided by the present invention, the timeliness validity with early warning is strong, reliable for operation at low cost, no
The characteristics of being interfered by false signals such as iron scales can realize automatic early-warning early stage the formation of continuous casting square billet corner defect, for casting
The exception monitoring of machine state and quickly processing provide a kind of effective means；The bulk corner quality of continuous casting billet can be effectively reduced to lack
Sunken occurrence risk helps to improve lumber recovery, reduces product quality loss.
Detailed description of the invention
Fig. 1 is continuous casting square billet corner defect automatic early-warning system composition schematic diagram.
Fig. 2 is the flow chart of continuous casting square billet corner defect automatic early warning method.
Fig. 3 is visual field section and detection window setting schematic diagram.
Fig. 4 is defect inspection start-up and shut-down control flow chart.
Fig. 5 is slab corner image analysis processing flow chart.
Fig. 6 is square billet corner defect early warning example schematic.
Fig. 7 is the positioning flow figure of defect beginning and end point.
Fig. 8 is the location Calculation schematic diagram of defect beginning and end point.
Specific embodiment
Embodiment
The present embodiment applies the present invention to Baosteel four and flows on large square bland continuous-casting machine, and casting blank of continuous casting machine section is 320*
425mm.With reference to the accompanying drawing, the embodiment of the present invention is described further.
As shown in Figure 1, a kind of continuous casting square billet corner defect automatic early-warning system, including image acquisition units 1, casting stream tracking
Unit 2, analysis and processing unit 3, alarm indication unit 4 and storage recording unit 5.
Described image acquisition unit 1, including industrial CCD video camera 1.1 and image pick-up card 1.2；Industrial CCD video camera
1.1 are furnished with 1 dustproof protecting box with form and a three-dimensional adjustable holder bracket；Video camera is mounted in dustproof protecting box,
It is fixed on holder bracket, for the image of continuous acquisition high temperature slab, and forms vision signal output；Image pick-up card is used for
High-speed sampling is carried out to vision signal and completes digitlization conversion, forms the accessible digitized image of analysis and processing unit 3 letter
Breath；
The image acquisition units of this example progressively scan colourful CCD video camera, resolution ratio 2048* using 1/1.8 " high-performance
1536；Image pick-up card coffret is Ethernet, supports ICP/IP protocol；
Tracking cell 2, including the long detection module 2.1 of casting and process tracking module 2.2 are flowed in the casting；The long detection mould of the casting
Block 2.1 is the impulse generator by being connected with withdrawal straightening machine live-roller motor shaft to carry out cast length detection, and will be real-time
The cast length detected sends process tracking module 2.2 to；The process tracking module 2.2, for tracking acquisition casting shape
State, cast length and procedure parameter, automatic Control processing unit 3 enter corresponding monitoring state, and single to analysis processing
Information needed for member 3 provides alarm logging；
The process tracking module of this example is made of PLC (programmable logic controller (PLC)), has ethernet communication interface；Casting
The impulse generator of long detection module uses incremental encoder, and resolution ratio 1024 connects with withdrawal straightening machine live-roller motor coaxle
It connects, pulse count by the numbered card of PLC accumulative；
The analysis and processing unit 3 is connected with image acquisition units 1 with casting stream tracking cell 2 respectively, for connecing in real time
The slab image information that image acquisition units 1 are sent is received, according to the Monitoring instruction that casting stream tracking cell 2 issues, automatically to setting
Image in detection window is analyzed and processed；It is cooling to the slab corner identified abnormal, it is sent out from trend alarm indication unit 4
Abnormal alarm signal out, and the position occurred to the report of storage recording unit 5 and recording exceptional slab and casting status information；
The analysis and processing unit of this example is made of technical grade computer, flows tracking cell with image acquisition units and casting
Connection type uses ethernet network communication modes；
The alarm indication unit 4 includes display and voice guard, and display is for showing collected slab figure
Picture and abnormal alarm instruction；Voice guard device is for making a sound prompt to monitoring room personnel when receiving alarm signal；
The storage recording unit 5 is used for slab image and exception information when will trigger abnormal alarm, and image is recorded
It in file and data file, is stored in big capacity hard disk, the retrieval and inquiry for history alarm；
A kind of continuous casting square billet corner defect automatic early warning method, as shown in Figure 2, comprising the following steps:
1) continuous acquisition is carried out to the slab image in setting visual field section by image acquisition units, and by image information
It is sent into analysis and processing unit；
The setting visual field section can pass through image as shown in figure 3, including longitudinal visual field section and transverse field section
The installation site and focal length size of video camera in acquisition unit is set；Longitudinal visual field section include continuous casting two cold room outlet and
One section of slab image between withdrawal straightening machine；Transverse field section includes the left and right corner image of every stream slab；
2) cast length by the long detection module real-time detection slab of casting in casting stream tracking cell in casting machine, and will
It sends process tracking module to；
The long detection module of casting is according to the umber of pulse for opening impulse generator sending when pouring rear withdrawal straightening machine throwing, Yi Jila
The speed ratio and roller diameter of machine live-roller are rectified, to track the generation length for calculating the every stream of casting machine and pouring slab；If the resolution of impulse generator
Rate is R, and the speed ratio of live-roller is G, and roller diameter D, the umber of pulse received is N, then the cast length L of every stream slab are as follows: L=N*
R*(πD/G)；
The resolution ratio R=1024 of the impulse generator of this example, the speed ratio G=595 of live-roller, live-roller roller diameter D=
500mm；
3) casting state, cast length and process are acquired by the process tracking module real-time tracking in casting stream tracking cell
Parameter, automatic Control processing unit enters corresponding monitoring state, and provides needed for alarm logging to analysis and processing unit
Information；
The process tracking module, be the slab according to representated by the casting state and cast length of casting machine end to end position come
Automatic Control processing unit starts and stops defect inspection, defect inspection start-up and shut-down control step, as shown in Figure 4, comprising:
3.1) after continuous casting, which is opened, to be poured, add up the variation delta L of cast lengthhead；
3.2) when slab head behind longitudinal visual field section position set by the image acquisition units, i.e. Δ Lhead≥S1, then
Process tracking module issues monitoring enabled instruction from trend analysis and processing unit；Wherein S1Expression, which is opened, pours position to longitudinal visual field section
The length of end；The S1 value of this example is 11000mm；
3.3) after continuous casting pours eventually, add up the variation delta L of cast lengthtail；
3.4) when slab tail portion reach image acquisition units set by visual field section position when, i.e. Δ Ltail≥S2, then process
Tracking module issues monitoring halt instruction from trend analysis and processing unit；Wherein S2Expression, which is opened, pours position to longitudinal visual field section head end
Length；The S2 value of this example is 10500mm；
4) the slab image information that analysis and processing unit real-time reception image acquisition units are sent flows tracking cell according to casting
The Monitoring instruction sent automatically is analyzed and processed the slab image in set detection window on every trajectory road；
Set detection window on every trajectory road, as shown in figure 3, including the two hough transform windows in left and right, symmetrically
The both sides of every stream slab image are distributed in, the left and right corner image of every stream slab is separately included, it can be according to locating for slab image
Position and size are adjusted setting；
The analysis and processing unit handles the analysis of slab corner image, as shown in Figure 5, comprising the following steps:
4.1) each pixel value in image is divided into three R (red), G (green), B (indigo plant) primary color components；In this example, often
The intensity of a primary color component indicates that codomain range is 0~255 with an octet；
4.2) real-time sampling extracts the intensity value of each pixel red component in set detection window on every trajectory road, i.e. R
Component value；
4.3) the R component average value for calculating separately pixel in every trajectory road or so detection window, obtains in left and right window
The average R component of slab corner image；
In this example, the two hough transform windows in left and right have been set respectively on 1-4 trajectory road both sides, size is 10*60 picture
Vegetarian refreshments, the R component in window is extracted and is calculated after testing, and the R component average value in each stream left and right detection window can be obtained,
In the 3rd stream value=130 left window R, lower the expressions slab folding corner region of right window R value=20, R value, which exists, is subcooled probability more
Height, corner defect Probability are bigger；
5) when analysis and processing unit identifies defect sign, from trend alarm indication unit sending abnormal alarm, and
It stores record in recording unit and saves exception information.
The defect sign identification and alarm, are that the average R component of slab corner image in left and right detection window is same
The alarm threshold value of setting is compared, and after the R component value of any side detection window is less than the alarm threshold value of setting, system is sent out
Corresponding site, corresponding abnormal alarm signal out；
The alarm threshold value of this example has set three grades, and level-one alarm threshold value is set as 70, and secondary alarm threshold value is set as 50, three
Grade alarm threshold value is set as 30；Due to value=20 right window R of the 3rd stream, system issues the cooling abnormal three-level of 3 stream right corners automatically
Sound-light alarm, as shown in fig. 6, prompt operator carries out inspection processing to casting machine state in time；Emphasis is flowed to 3 after shutting down
Casting machine state checked, it was found that in two cold houses 3 stream spraying racks on the right side of have hose coupling leak, to slab right corners
After cooling quality causes adverse effect, service personnel to handle leakage point, which disappears, and casting machine restores normal；
The exception information of the record includes the position of the time of defect beginning and end, defect beginning and end point, when
The grade of steel of preceding production, with the positioning searching for the retrospective analysis of mass defect processing and defect material object base；
The position of the defect beginning and end point, respectively with defect alarm starting point and end point between initial base head
Length distance determines；The position fixing process of defect beginning and end point is as shown in fig. 7, steps are as follows:
5.1) it presets space coordinate corresponding to every stream picture detection window center line and opens the length poured between position together
Distance L0, as shown in figure 8, the value is basically unchanged after determining；
5.2) when system identification, which goes out defect sign, starts alarm, the position of defect starting point is calculated and recorded automatically
Lstart=L1-L0, indicate defect starting point with the length distance between initial base head；Wherein L1Slab for defect start time pours
Cast length；
5.3) at the end of defect sign disappears, alarms, the position L of defect end point is calculated and recorded automaticallyend=
L2-L0, indicate defect end point with the length distance between initial base head；Wherein L2For the slab cast length of defect finish time；
The L of this example0=10750mm, L when 3 stream defect alarms start1=19360mm, the L at the end of defect alarm2
=23010mm, then system has also automatically recorded defect to open other than automatically recording time of defect beginning and end, grade of steel
The position L of initial pointstart=L1-L0=19360-10750=8610mm, the position L of defect end pointend=L2-L0=23010-
10750=12260mm indicates that defect occurs position and is located at the position for flowing 8610~12260mm of initial base head from 3, finally flows to 3
The slab emphasis at the position has carried out quality inspection, it was found that there are chink defects in slab corner, carry out immediately to the defect base
Processing, it is therefore prevented that defect base flows into next procedure and user hand.
Claims (7)
1. a kind of continuous casting square billet corner defect automatic early warning method, comprising the following steps:
1) continuous acquisition is carried out to the slab image in setting visual field section by image acquisition units, and image information is sent into
Analysis and processing unit；
2) cast length by the long detection module real-time detection slab of casting in casting stream tracking cell in casting machine, and passed
Give process tracking module；
3) casting state, cast length and process ginseng are acquired by the process tracking module real-time tracking in casting stream tracking cell
Number, automatic Control processing unit enters corresponding monitoring state, and provides needed for alarm logging to analysis and processing unit
Information；
4) the slab image information that analysis and processing unit real-time reception image acquisition units are sent is sent according to casting stream tracking cell
Monitoring instruction, the slab image in set detection window on every trajectory road is analyzed and processed automatically；
The analysis and processing unit handles the analysis of slab image, comprising the following steps:
4.1) each pixel value in image is divided into three R (red), G (green), B (indigo plant) primary color components；
4.2) real-time sampling extracts the intensity value of each pixel red component in set detection window on every trajectory road, i.e. R component
Value；
4.3) the R component average value for calculating separately pixel in every trajectory road or so detection window, obtains slab in left and right window
The average R component of corner image；
5) when analysis and processing unit identifies defect sign, abnormal alarm is issued from trend alarm indication unit, and storing
Record saves exception information in recording unit；
The identification of the defects of the step 5) sign and alarm are by the average R of slab corner image in left and right detection window points
Amount is compared with the alarm threshold value of setting, after the R component value of any side detection window is less than the alarm threshold value of setting, system
Issue corresponding site, corresponding abnormal alarm signal；
The exception information of the record includes the position of the time of defect beginning and end, defect beginning and end point, works as previous existence
The grade of steel of production, with the positioning searching for the retrospective analysis of mass defect processing and defect material object base.
2. a kind of continuous casting square billet corner defect automatic early warning method as described in claim 1, which is characterized in that
The setting visual field section of the step 1), including longitudinal visual field section and transverse field section, can pass through Image Acquisition list
The installation site and focal length size of video camera in member is set；Longitudinal visual field section includes the outlet of continuous casting two cold room and withdrawal straightening machine
Between one section of slab image；Transverse field section includes the left and right corner image of every stream slab.
3. a kind of continuous casting square billet corner defect automatic early warning method as described in claim 1, which is characterized in that
The long detection module of casting in the step 2) is the umber of pulse that basis opens that impulse generator issues when pouring rear withdrawal straightening machine throwing,
And the speed ratio and roller diameter of withdrawal straightening machine live-roller, to track the generation length for calculating the every stream of casting machine and pouring slab；If impulse generator
Resolution ratio be R, the speed ratio of live-roller is G, and roller diameter D, the umber of pulse received is N, then the cast length L of every stream slab
Are as follows: L=N*R* (π D/G).
4. a kind of continuous casting square billet corner defect automatic early warning method as described in claim 1, which is characterized in that
The process tracking module of the step 3) is the position end to end of the slab according to representated by the casting state and cast length of casting machine
It sets to automatically control analysis and processing unit and start and stop defect inspection, steps are as follows for defect inspection start-up and shut-down control；
3.1) after continuous casting, which is opened, to be poured, add up the variation delta L of cast lengthhead；
3.2) when slab head behind longitudinal visual field section position set by the image acquisition units, i.e. Δ Lhead≥S1, then process
Tracking module issues monitoring enabled instruction from trend analysis and processing unit；Wherein S1Expression, which is opened, pours position to longitudinal visual field section end
Length；
3.3) after continuous casting pours eventually, add up the variation delta L of cast lengthtail；
3.4) when slab tail portion reach image acquisition units set by visual field section position when, i.e. Δ Ltail≥S2, then process tracking
Module issues monitoring halt instruction from trend analysis and processing unit；Wherein S2The length for pouring position to longitudinal visual field section head end is opened in expression
Degree.
5. a kind of continuous casting square billet corner defect automatic early warning method as described in claim 1, which is characterized in that
Set detection window on every trajectory road in the step 4), including the two hough transform windows in left and right, it is symmetrical
On the both sides of every stream slab image, the left and right corner image of every stream slab is separately included, it can be according to the location of slab image
Setting is adjusted with size.
6. a kind of continuous casting square billet corner defect automatic early warning method as described in claim 1, which is characterized in that
The position of the defect beginning and end point, respectively with starting point and end point of alarming with the length distance between initial base head
To determine；The positioning process step of defect beginning and end point is as follows:
5.1) it presets space coordinate corresponding to every stream picture detection window center line and opens the length distance poured between position together
L0, it is basically unchanged after the value is determining；
5.2) when system identification, which goes out defect sign, starts alarm, the position L of defect starting point is calculated and recorded automaticallystart
=L1-L0, indicate defect starting point with the length distance between initial base head；Wherein L1For the slab casting length of defect start time
Degree；
5.3) at the end of defect sign disappears, alarms, the position L of defect end point is calculated and recorded automaticallyend=L2-L0,
Indicate defect end point with the length distance between initial base head；Wherein L2For the slab cast length of defect finish time.
7. a kind of continuous casting square billet corner defect of the continuous casting square billet corner defect automatic early warning method for claim 1 is automatically pre-
Alert system, including image acquisition units, casting stream tracking cell, analysis and processing unit, alarm indication unit and storage recording unit,
It is characterized in that,
Image pick-up card is used to carry out vision signal high-speed sampling and completes digitlization conversion, and forming analysis and processing unit can locate
The digital image information of reason；
Tracking cell, including the long detection module of casting and process tracking module are flowed in the casting；The long detection module of the casting, be by with
The impulse generator that withdrawal straightening machine live-roller motor shaft is connected carries out cast length detection, and the casting that real-time detection is arrived is long
Degree sends process tracking module to；
The process tracking module, for tracking acquisition casting state, cast length and procedure parameter, automatic Control processing
Unit enter corresponding monitoring state, and to analysis and processing unit provide alarm logging needed for information；
The analysis and processing unit is connected with image acquisition units with casting stream tracking cell respectively, adopts for real-time reception image
The slab image information that collection unit is sent, according to the Monitoring instruction that casting stream tracking cell issues, automatically in setting detection window
Image be analyzed and processed；To the slab corner defect sign identified, abnormal alarm is issued from trend alarm indication unit
Signal, and the position occurred to the report of storage recording unit and record slab corner defect sign and casting status information.
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| CN112404384B (en) * | 2020-11-18 | 2022-03-08 | 河北凯昌科技有限公司 | Continuous casting blank moving tracking system and method |
| CN112355265B (en) * | 2020-11-23 | 2021-07-30 | 福建三宝钢铁有限公司 | Continuous casting slab triangular region crack control method |
| CN117607166A (en) * | 2023-11-24 | 2024-02-27 | 长沙湘鸿仪器机械有限公司 | Online monitoring system for surface defects of enameled wire |
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