CN109047683A - A kind of continuous casting billet is intelligent to reset ruler on-line control system surely - Google Patents
A kind of continuous casting billet is intelligent to reset ruler on-line control system surely Download PDFInfo
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- CN109047683A CN109047683A CN201811020228.1A CN201811020228A CN109047683A CN 109047683 A CN109047683 A CN 109047683A CN 201811020228 A CN201811020228 A CN 201811020228A CN 109047683 A CN109047683 A CN 109047683A
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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
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
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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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/163—Controlling or regulating processes or operations for cutting cast stock
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Abstract
The present invention relates to a kind of continuous casting billets intelligently to reset ruler on-line control system surely, which contains input module, data acquisition module, data memory module, communication module, core calculation module, output module, execution module and monitoring interface module.Pass through the information such as data collecting module collected continuous casting billet Real-time Production Process data, cutting machine playback deviation and continuous casting billet weighing, pass through data memory module storing data, data calculation processing is carried out using the continuous casting billets of fixed weight control method of multi-model by core calculation module, export optimal continuous casting fixed-length setting value, and it is handed down to the execution of scale system, to improve continuous casting billets of fixed weight precision.Tie of the system using communication module as control system optimized integration data interaction is, it can be achieved that data acquisition module and production manager level MES system data communication and Basic automation level PLC system data communication.Interface monitoring module realizes production process visualization in the form of " number, table ", reflects various important information visual and clearly.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, intelligently reset ruler On-line Control system surely more particularly to a kind of continuous casting billet
System.
Background technique
In iron and steel enterprise's continuous casting process process, the conticaster of most of steel mills is determined with scale (continuous casting billet length)
Weight that is, using the continuous casting billet of weight needed for the next process steel rolling of scale system production, but is crystallized in the actual production process
The influence of device abrasion, pulling rate variation, degree of superheat variation and molten steel composition variation leads to the identical continuous casting billet weight difference of length
Larger, the actual weight for continuous casting billet occur is not weight required for steel rolling.Continuous casting billet is overweight will cause rolling after clout too
It is more, cause substandard products amount to increase if kicking the beam, the precision of continuous casting material weight affects Rolling Yield.
To improve continuous casting material weight accuracy, some enterprises apply the mode based on camera shooting scale, weighing feedback compensation
The online feedback control technology of the continuous casting billets of fixed weight scale controlled, i.e., in process of production, steel rolling mill, will according to specification of becoming a useful person
Steel billet weight is supplied to steel mill as target weight, and system sets base length according to target weight automatically and cuts to slab,
Then it weighs to the steel billet after cutting, the weight weighed up is compared with target weight, must be deviated, and then secondary under
The length of cutting slab compensates, and circuits sequentially (consecutive weighings continuously adjust), Approach by inchmeal is not (under different operating conditions, using
Same adjustment factor), the steel billet outer dimension for being finally reached conticaster production has difference, but weight having the same, is next
Procedure provides stable blank.But this control model only can overcome the disadvantages that scale caused by the apparatus factors such as crystallizer copper pipe abrasion
Deviation does not account for the influence of continuous casting billet pulling rate variation experienced, degree of superheat variation and molten steel composition variation, only continuous casting
When machine perseverance pulling rate, stationary temperature and smaller molten steel composition fluctuation, preferable precision could be obtained.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of continuous casting billets intelligently to reset ruler On-line Control surely
System.This system integrates production course data tracking, weighing system, machine learning and intelligent control, comprehensively considers
The influence of crystallizer wear equipment factor and operating condition (pulling rate variation, degree of superheat variation and molten steel composition variation) fluctuation etc. are raw
Produce the influence of process parameter change, it can be achieved that continuous casting billet carry out it is accurately fixed cut again, for next process provide it is stable,
Fluctuation it is seldom, the accurate blank of weight, reduce clout after rolling for steel rolling, reduce metal loss, reduce random ruler material ratio, most
It improves eventually and rolls into the production and technical indications such as rate, lumber recovery, generate considerable economic benefit for enterprise.Technique is also more square
Just, the information, including heat (batch) number, weighing data etc. for accurately obtaining every piece of base after cutting, facilitate steel mill to carry out the information of continuous casting billet
Real time monitoring and inquiry understand production stability state, instruct in time production, greatly facilitate production management.Benefit simultaneously
With network communication technology, it is more reasonable, complete to the settlement data of steel rolling mill to may be implemented steel mill, according to more abundant, together
Shi Tigao measuring accuracy prevents human factor error.
Intelligently resetting ruler on-line control system comprehensive integration surely has input module, data acquisition module to continuous casting billet of the invention
Block, data memory module, communication module, core calculation module, output module, execution module and monitoring interface module.Input
Module can modify to control system initial setting up, according to the actual situation with need to do control system some adjustment.Number
According to the current production process course information of acquisition module continuous collecting continuous casting billet, and collected production process course information transfer
To data memory module, core calculation module.Data memory module is the basis of control system, it acquires the data received
Module is stored with the data that communication module passes over.Communication module is the tie of control system, passes through OPC (OLE for
The abbreviation of Process Control is used for the OLE of process control, is an industrial standard) communication is realized and basic automatization
PLC system data interaction is realized and production manager level MES by database mode (Oracle, SQLServer, MySQL etc.)
The interaction of (abbreviation of manufacturing execution system) system data, meanwhile, communication module uses L1 grades and L2
Grade interlocking safeguard measure and free switching and emergency handoff functionality, manually participate in link to reduce, improve the intelligence of control system
Degree can be changed.Core calculation module is the core of entire control system, receive data acquisition module real-time working condition data and
Production course tracking data in data memory module, after carrying out data diagnosis and processing, using the Dynamic matrix control plan of multi-model
Slightly, synthetic setting continuous casting billet cuts scale.Core calculation module prediction module containing scale and compensating module, wherein prediction module is joined
Online prediction in real time is carried out to continuous casting billet weight and scale according to the corresponding production course information of continuous casting billet, compensating module is according to continuous casting
Base weighing data and cutting machine playback separate-blas estimation compensate value to scale and calculate.Knot of the output module core calculation module
Fruit exports to execution module.The result for the core calculation module that execution module is passed over according to output module is realized to continuous casting billet
Length-fixing cutting.Monitoring interface module is the window of control system, shows that the form of control system " number, table " from number
According to acquisition module, data memory module, communication module, core calculation module, the data of output module, realize that production process is visual
Change, operation or technologist is facilitated to understand the casting plan of each casting stream, production course, manufacturing parameter, scale, title visual and clearly
The important informations such as the weight and scale of heavy amount and prediction.
Data acquisition module passes through communication module continuous collecting continuous casting billet Real-time Production Process course data trace information, cuts
It weighs after cutting mill playback deviation, continuous casting billet cutting and information, the data collecting module collecteds such as production manager level MES system data arrives
Information be transmitted to data memory module, core calculation module；Data storage is carried out by data memory module；With communication module
As the tie of control system optimized integration data interaction, data acquisition module and production manager level MES system and basis are realized
Automate grade PLC system data communication；Core calculation module from data acquisition module obtains real-time working condition data and from data
Memory module obtains course tracking data, carries out data diagnosis and calculation processing；By output module core calculation module
As a result it exports to execution module；The result for the core calculation module that execution module is passed over according to output module is realized to continuous casting
The Length-fixing cutting of base.Communication module uses the measure of two-stage interlock protection, realizes free switching and emergency handoff functionality.
In production process, the data acquisition module of the surely heavy cut-to-length control system of continuous casting billet intelligence can obtain to open automatically to be poured, goes out
Tail base such as stops pouring at the signals, after system is according to current production signal enabling, from production manager level MES (manufacturing
The abbreviation of execution system) system acquisition casting plan, current casting item is obtained from Basic automation level PLC system
Part (ladle molten steel weight, middle packet Metal Weight, pulling rate, liquid steel temperature, crystallizer water and temperature difference etc.), when acquisition cutoff signal
It is automatic to obtain practical weighing data or after weighing-up wave, in conjunction with production course tracking data, start pre- in core calculation module
It surveys model and compensation model, COMPREHENSIVE CALCULATING cuts scale next time, by output module (PLC system), be handed down to scale system.
The calculation formula of continuous casting billet quality M:
M=ρ V=ρ * S*L.
In formula:
ρ is continuous casting billet density, unit K g/m3, continuous casting billet density becomes with steel grade and slab temperature.Steel grade is by molten steel composition
It influences, and continuous casting blank temperature is then influenced by cooling (primary cooling), the secondary cooling of crystallizer, drawing speed, middle Baogang's coolant-temperature gage.
V is continuous casting billet volume, V=S*L, unit m3。
L is continuous casting fixed-length (length), unit m.Continuous casting fixed-length is mainly by the systematic error and cutting machine of scale system
The error of system influences.
S is the area of continuous casting billet cross section, unit m2.It is related with continuous casting billet specification, in the case where same specification, due to
The continuous casting mold degree of wear is different, continuous casting billet actual profile size slightly difference.In addition, when drawing speed is higher, even
The green shell that slab goes out crystallizer is relatively thin, there is bulge tendency, also will affect the actual profile size of continuous casting billet, at this time continuous casting billet density
Also it changes, therefore, this influence can be comprehensively considered by the influence of continuous casting billet density.
By the analysis of Influential Factors of the above continuous casting billet weight, in conjunction with actual production process, to improve continuous casting billets of fixed weight essence
Degree, can be analyzed from following Technology Ways:
1) influence for continuous casting billet density to weight can acquire production process history parameters in real time, close using continuous casting billet
The mode of mathematical modeling or machine learning is spent to its comprehensive analysis, is established and is determined to reset ruler control based on production process course information
Simulation；
2) mode of laser ranging can be used to continuous casting machine-cut in the influence for cutter system to the practical scale of continuous casting billet
It cuts origin position to be measured in real time, it is proposed that the continuous casting fixed-length compensation model based on cutter system.For scale system
High-precision scale system, such as camera shooting scale or laser scale system can be used in influence of the systematic error to continuous casting fixed-length
Etc. contactless Length-fixing cutting technology.
It 3), can be by online to continuous casting billet for influence of the equipment to continuous casting billet actual profile size such as crystallizer abrasions
It weighs, establishes the scale compensation model fed back based on continuous casting billet weight；
It 4), can be using the side with MES system, PLC system real-time communication to meet continuous casting billets of fixed weight on line real time control
Formula integrates continuous casting billets of fixed weight scale on-line intelligence control system.
Therefore, continuous casting billet is carried out accurately determining to cut again to realize, which intelligently resets ruler On-line Control system surely
The comprehensive acquisition for using continuous casting billet process data course information tracking method and carrying out continuous casting billet process data of system, uses
The fixed continuous casting billets of fixed weight control based on multi-model for controlling submodel and the fusion of continuous casting billet feedback control submodel again of continuous casting billet feedforward
Method processed controls precision to improve continuous casting billets of fixed weight scale, sees Fig. 4 and Fig. 5, and wherein feedback control submodel is used based on online
The length compensation of weighing system controls submodel, and feedforward control submodel can be using the company based on cutting machine playback separate-blas estimation
Slab scale compensation model, the control submodel based on continuous casting billet density feature and various comprising " sample data+training "
Frame mode submodel (such as based on neural network method prediction control submodel, based on the GBDT of Scikit-learn
Control submodel that the control submodel of method prediction, random forest method based on Scikit-learn are predicted is based on
The continuous casting billets of fixed weight prediction model of the machine learning such as Tensorflow method PREDICTIVE CONTROL submodel) etc. several or all feedforwards
The feed forward control method Models Sets of control method building.It is that continuous casting billet is intelligently reset involved in ruler on-line control system surely below
New method and model is discussed in detail:
(1) continuous casting billet process data course information tracking method
Machine learning primarily solves the problems, such as it is correct data sample, i.e., continuous-cast blank weight is corresponded to mutually complete therewith
Continuous casting billet course data information.Continuous whole continuous casting billet course data information in order to obtain, along continuous casting billet traffic direction,
Continuous casting billet, at several cell blocks, is shown in Fig. 6 by certain length virtual grate, using each cell block as independent information unit,
It is originated from molten steel solidification starting point, tracking and monitoring continuously is carried out to the information data of each cell block carrying according to some cycles,
Record to control end point terminates, and forms complete continuous casting billet and corresponds to Dynamic Tracking Data archives.Molten steel solidification can be started
Point (generally taking crystallizer meniscus) regards cell block birth point as, and control end point regards cell block end point as, and cell block is from out
Raw point regards the service life of cell block as along the traveling duration that continuous casting billet traffic direction advances to end point, controls end point by user
It is customized, maximum scale distal point position after generally taking continuous casting billet to cut.
Preferably, to each cell block equal length of continuous casting billet virtual grate, unit block length is less than 10mm,
To guarantee that the uniform and density of process data acquisition and recording, enhancing data use the reliability with analysis.
Each cell block is independent information unit, the information packet that cell block is carried as independent information unit
Include but be not limited to cell block self attributes, production status data attribute, production signal attribute and production event attribute.
In actual production process, each cell block since birth track procedural information, cell block is according to data
Record period is grown up, and every growth is primary, corresponding data is recorded according to the position where it, circularly to cell block
Data record is carried out, until cell block reaches control zone end point (terminal).In a data record period, if continuous casting billet
The distance of forward movement is greater than or equal to a unit block length, then can generate new list at molten steel solidification starting point (birth point)
First block, the cell block in control zone, which is advanced, grows up, and in control zone, end point (terminal) will have cell block disappearance, entirely produce
Journey is successive；Conversely, in a data record period, if less than one cell block of distance that continuous casting billet moves forward is long
Degree will not generate new cell block at molten steel solidification starting point (birth point), until accumulative range ability is greater than or equal to unit
Block length.When cell block is not more than cell block along continuous casting billet along the distance that continuous casting billet traffic direction advances within a cycle time
When the length of traffic direction, it is ensured that all information records cell block at least once on each length node.Reach control zone
The information of the cell block of end point contains all process data course information of the cell block in developmental process, at this point, being not required to
These data informations are carried out with continuous casting billet production process data backtracking again, so that it may carry out point of continuous casting billet quality or weight
Analysis.
(2) length compensation based on on-line weighting system controls submodel
Length compensation control submodel based on on-line weighting system belongs to feedback control submodel, is to the company after cutting
Slab weight carries out on-line measurement, whether determines the scale cut next time with the comparative situation of obtained data and standard value
The model being adjusted.The reliability of weighing data is to establish the premise of the scale compensation model based on weight, and test online
Card intelligence resets the basis of ruler Controlling model accuracy surely.Continuous casting billet online weighing device mainly has hanging box hoisting type and frame top
The structure types such as lift-type are subjected to temperature, humidity since weighing system is in the roller-way regional work that temperature is high, humidity is big for a long time
Variation, receives the impact of weighing frame, site environment very severe, it is desirable that the environmental suitability of weighing system is strong, reliably for a long time
Property it is high, failure rate is low.Therefore, weighing system, using the relatively good cylindrical weighing sensor of high temperature resistance, and set water cooling guarantor
Shield measure and weighing hanging box anti-deflection measure.The weighing precision of weighing system is not more than ± 1kg.
Using the practical weight weighed of above-mentioned continuous casting billet weighing system, scale can be cut next time to continuous casting billet and mended
It repays, to eliminate the influences of the apparatus factors to continuous casting billet weight such as crystallizer abrasion, the continuous casting fixed-length compensation based on weighing system
Measure calculation formula are as follows:
△Lm1=Ki(Li(G0-Gi)/Gi)
In formula:
△Lm1--- slab cuts scale offset, mm next time；
Li--- the scale of this cutting of slab；
G0--- slab pivot weight；
Gi--- the practical weighing weight of slab；
Ki--- length correction coefficient.
Length correction COEFFICIENT KiValue function see Fig. 7, calculation formula are as follows:
The K when only carrying out primary effectively weighingi=0.6~0.8, value can need automatic setting according to rate is approached；
When effectively weighing more than twice
In formula:
X --- deviation of weight quantitative change amount,Unit ‰；
a0、b0, a, b and x1、x2Etc. parameters be constant, need sets itself, but a according to rate is approached by technologist0、
b0, a, b and x1、x2Setting must meet: 1.0 >=b0> a0≥0。x1And x2It requires to be chosen according to deviation of weight control, one
As 0≤x1< x2≤5；Work as x=x1When, ax+b=a0, work as x=x2When, ax+b=b0.Work as a0、b0、x1、x2After determination, it can obtain
A, b out.
When this weighing weight is greater than pivot weight tolerance, executed by last time scale；
It presses when this weighing weight is greater than pivot weight when last time weighs weight less than pivot weight close to pivot weight
Weight Gi and length Li as actual measurement of weight and corresponding length；
When prediction model participates in controlling, the calculation formula of scale compensation model are as follows:
In formula:
ΔLmi--- the prediction apparatus factor offset of Controlling model Mi, mm；
K --- effectively number and number is effectively predicted in weighing, i.e., when the deviation of weighing value and predicted value, weighing value and benchmark
When the deviation of value is all satisfied allowable error, then it is assumed that effectively.As k=0, Δ LmiSub-value in maintenance；
Lmij--- the practical scale of slab of jth time weighing, mm；
Gmij--- the slab weight predicted value of jth time weighing, kg；
Gj--- the slab actual weight of jth time weighing, kg；
(3) the continuous casting fixed-length compensation model based on cutting machine playback separate-blas estimation
A basic point is determined on continuous cast stock cutter moving direction, and laser range finder is installed in base position, determines base
The reference distance of point and cutting machine origin carries out reference distance setting in PLC system；Before preparing to cut work, determination is cut
Cutting mill has playbacked；The actually located position of cutting machine (relative to basic point) distance after being playbacked with laser range finder measurement, sharp
Optar gives PLC system data transfer；Cutting machine is for basic point after calculating measurement gained playback by PLC system
The deviation of distance and reference distance；Judge whether calculated deviation is more than continuous casting billet cutting tolerance range, if so,
Then when the cutting machine before cutting to continuous casting billet is advanced, the stroke with deviation to cutting machine is compensated.If deviation
It is less than continuous casting billet cutting tolerance range, then does not need to compensate the stroke of cutting machine, sees Fig. 8.
Continuous casting cutter origin detection device is shown in that Fig. 9, including cutting machine (1), running track (3), cutting machine (1) are located at
In running track (3), have on cutting machine (1) burning torch (2), which further includes laser range finder (4), laser range finder support frame
(9), ranging target (5), PLC system (10) and scale system (11), laser range finder (4) are fixed on laser range finder support frame
(9) on, laser range finder support frame (9) is located at one end of running track (3), and ranging target (5) face laser range finder (4) is set
It sets on cutting machine (1), laser range finder (4) is connect with PLC system (10), and PLC system (10) is connect with scale system (11),
Distance Transmission gives PLC system (10) after laser range finder (4) playbacks measured cutting machine (1), after cutting machine (1) playback
Distance offsets go beyond the scope, then deviation is transferred to scale system (11) compensation scale setting value by PLC system (10).?
Reference distance value when cutting machine (1) stops at origin with laser range finder (4) this basic point is set in PLC system (10)
S0, the continuous casting billet cutting parameters such as tolerance Δ S, under normal circumstances, cutting machine (1) is completed to cut all playback each time to arrive
Origin, in cutting continuous casting blank work, scale system (11) controls cutting machine (1) from origin along running track (3) and continuous casting billet
(8) synchronizing moving, and continuous casting billet (8) is cut with burning torch (2), after the completion of cutting, cutting machine (1) is returned to origin movement
Position, to prepare cutting action next time.When cutting machine (1) playbacks, since the influence of various factors is likely to just to return
To origin position, but there is certain deviation with origin position.So in actual work, after cutting machine (1) playback, laser is allowed
Rangefinder (4) issues laser, by ranging target (5) to the feedback of laser measure cutting machine (1) and laser range finder (4) this
The distance S of basic point1, distance S that this is measured1It is transferred to PLC system, is calculated by the computation model set in PLC system
Distance offsets Δ LM2, deviation Δ LM2Tolerance range delta L is cut with continuous casting billet0Comparison, sees if fall out, if
Exceed, then gives ruler system (11) continuous casting billet length settings and compensate a Δ LM2Value.Such as benchmark scale L0For continuous casting billet length
Setting value；As Δ LM2Absolute value be greater than allow measurement control precision Δ L0When, then combine benchmark scale L0To setting scale L
Compensate calculating: L=L0+ΔLM2, using the L value after compensated as continuous casting billet length settings next time.
Scale compensation rate calculation formula based on cutting machine playback deviation are as follows:
ΔLM2=S1-S0
In formula:
ΔLM2--- slab cuts scale offset, mm next time；
S1--- cutting machine return is finally stopped position, mm；
S0--- cutting machine benchmark origin position, mm；
(4) with the submodel of the frame mode of " sample data+training "
Belong to prediction model with the feedforward control model of the submodel of the frame mode of " sample data+training ", using even
After the course information of slab process data course information tracking method acquisition establishes data sample, it is separately input to the scale established
Training pattern and determine retraining model carry out self study, repeatedly study carry out arameter optimization after, to scale model with determine molality type
It is saved, is then integrated into and is reset in ruler prediction model surely, in actual production process, prediction model is in real time according to continuous casting billet
Process data information calls corresponding scale model or determines molality type, online real to continuous casting fixed-length and fixed progress again respectively
When predict, the continuous casting billet for the weight that notes abnormalities in time, improve continuous casting billets of fixed weight precision, see Figure 10.
Training pattern can be used with the model of the frame mode of " sample data+training ", including but not limited to based on mind
Control submodel that control submodel through network method prediction, GBDT method based on Scikit-learn are predicted is based on
The control submodel of the random forest method prediction of Scikit-learn, based on Tensorflow method PREDICTIVE CONTROL submodel etc.
After the completion of the continuous casting billets of fixed weight prediction model of machine learning, scale model and surely heavy model training, model is saved, with side
The phase resets ruler prediction model surely and calls directly model after an action of the bowels.
Online progress scale is determined to predict again when, the production process data of real-time collecting continuous casting billet, when cutoff signal occurs,
Analysis and arrangement is carried out according to the data format of training pattern to process data, pre- measured weight is respectively obtained and predicts the input of scale
Then data are called and corresponding determine weight/scale model.On the one hand the continuous casting billet weight for predicting this cutting, if weight
It is overproof, it gives a warning in time；On the other hand the cutting scale next time for predicting desired wt to be obtained, is issued to scale system
System, can guarantee that slab weight meets billet weight requirement to cut each time.
For the intelligent control for realizing continuous casting billets of fixed weight scale, the surely heavy cut-to-length control system process control of continuous casting billet intelligence is used
Multistage Control, each level that controls is mutually indepedent, using the communication protocol of standard.The surely heavy cut-to-length control system communication of continuous casting billet intelligence
Using industrial standard OPC technology realize with the data interaction of production line base level PLC system, realized by the way of database with
The data interaction of production manager level MES system.
Compared with prior art, the beneficial effects of the present invention are: being based on continuous casting billet process data course information tracking method
With system Multistage Control thought, it is integrated with continuous casting billet and intelligently resets ruler on-line control system surely, it is raw to slab using mathematical model
Production course data are tracked in real time, in real time according to production course data and practical weighing data, have comprehensively considered conticaster
The influence of apparatus factor and production status data to continuous casting billet weight cuts continuous casting billet using the advanced strategy of Multiple model control
It cuts scale to be optimized, realizes preferable continuous casting billets of fixed weight precision controlling.
Detailed description of the invention
Fig. 1 is structure of the invention composition；
Fig. 2 is inventive network topological structure；
Fig. 3 is parameter input/output relation of the present invention；
Fig. 4 is Multiple model control structure chart；
Fig. 5 is certain multi-model collection composition figure；
Fig. 6 is the cell block division schematic diagram as independent information carrier；
Fig. 7 is length correction COEFFICIENT KiValue functional arrangement；
Fig. 8 is the continuous casting fixed-length compensation method flow chart based on cutting machine playback separate-blas estimation；
Fig. 9 is the continuous casting fixed-length compensation device structure chart based on cutting machine playback separate-blas estimation；
Figure 10 is continuous casting billets of fixed weight scale on-line prediction method flow diagram；
Figure 11 is main program calculation flow chart of the present invention；
Figure 12 is monitoring interface of the present invention in certain steel mill；
Figure 13 is practical application metallurgical effect comparison diagram of the present invention.
In Fig. 4: the output of U- controller；E- model error；The output of y- result
In Fig. 9: 1, cutting machine 2, burning torch 3, running track 4, laser range finder 5, ranging target 6, laser range finder
Bracket 7, fixed frame 8, continuous casting billet 9, laser range finder support frame 10, PLC system 11, scale system
Specific embodiment
The following further describes the present invention with reference to the drawings.
Continuous casting billet intelligently reset surely ruler on-line control system be collection weighing system, production course data tracking, machine learning,
The new technology that mathematical model and intelligent control are integrated.As shown in Figure 1, the present invention mainly by input module, data acquisition module,
Data memory module, communication module, core calculation module, output module, execution module and monitoring interface module composition.Data
Acquisition module is connect with data memory module, core calculation module, and data acquisition module continuous collecting continuous casting billet produced in real time
Information, the information that data collecting module collected arrives such as weighing turn after Cheng Licheng information, cutting machine playback deviation and continuous casting billet cutting
It is delivered to data memory module, core calculation module；Data memory module obtains production manager level MES system number by communication module
According to and production process data, and carry out data storage；Using communication module as the tie of control system optimized integration data interaction,
Realize data acquisition module and production manager level MES system and Basic automation level PLC system data communication；Core calculation module
Real-time working condition data are obtained from data acquisition module and obtain historical data from data memory module, carry out data diagnosis and meter
Calculation processing；The result of core calculation module is exported to execution module by output module；Execution module is passed according to output module
The result for the core calculation module passed realizes the Length-fixing cutting to continuous casting billet.
Communication module uses the measure of two-stage interlock protection, realizes free switching and emergency handoff functionality.To realize continuous casting billet
Surely the intelligent control of ruler is reset, process of the present invention control uses Multistage Control, and each control level is mutually indepedent, using the logical of standard
Believe agreement.As shown in Fig. 2, being individually present relative to L1 grades and L3 grades, the invention belongs to L2 grades for completing L1 grades of simple number
Learn the impossible complicated calculations of model.The data interaction communication of the present invention and production line base level PLC system is using industry mark
Quasi- OPC technology realizes that the data interaction with production manager level MES system is realized by the way of database.Automatic control process
In, L2 grades obtain production plan from L3 grades of systems, and acquire the real data of current production status from L1 grades of PLC, application
After core calculations model optimizes calculating to the data of setting, it is handed down to the instruction execution that PLC optimizes data.
Input/output relation of the invention is shown in Fig. 3, and main program calculation flow chart of the present invention is shown in Figure 11, the present invention automatically from
PLC system acquisition, which is opened, the signals such as pours, goes out tail base, stops pouring, and after system is according to current production signal enabling, obtains automatically from MES system
Take casting plan (ladle heat (batch) number, time of appearing on the stage, steel grade title, molten steel composition, slab pivot weight, slab datum length/fixed
Ruler is negative weight, cross dimensions etc.), meanwhile, automatically from PLC system obtain current manufacturing parameter (ladle molten steel weight, in
The cooling disengaging water temperature difference of packet Metal Weight, drawing speed, middle Baogang's coolant-temperature gage, crystallizer cooling water inflow, crystallizer, secondary cooling zone are each
Circuit actual amount of water, practical scale, continuous casting billet actual weight and cutting machine origin position etc.), and carry out going through for creation data
Journey information trace；When obtaining cutoff signal or after weighing-up wave, automatically analyze production course data, starting prediction computation model and
Compensating length computation model, the scale of cutting next time after comprehensive analysis calculating are handed down to scale system through PLC system.
By taking certain steel mill's actual production as an example, continuous casting billet intelligently resets monitoring interface such as Figure 12 institute of ruler on-line control system surely
Show, control system shows production process data and model optimization data in the form of " number, table ", and technologist can be intuitive
Clearly understand casting plan, the production course data, real-time working condition parameter, continuous casting fixed-length, continuous casting billet weighing weight of each casting stream
The important information such as the cutting scale of continuous casting billet weight and optimization of amount and prediction.With the steel mill, certain production section is
For 160mm × 160mm, production steel grade are HRB400-E, benchmark scale is L0=10500mm, pivot weight G0=
2354kg.It is Li=10514mm, actual weight Gi=2348kg that certain, which cuts practical scale,.Cutting machine benchmark origin S0=
500mm, it is S1=503mm that cutting machine, which returns to stop position,.Controlling model is through analyzing production course data, using Multiple model control plan
It is Li=10553mm that slightly cutting scale next time, which is calculated, in optimization, and the weighed system of continuous casting billet after cutting weighs to obtain reality
Border slab weight is Gi=2354kg.As it can be seen that can achieve preferable control effect in the fixed control again of this slab of the present invention.
Figure 13 be certain steel mill some pour time, using traditional control technology based on the compensation of weighing system scale (in diagram
Shown in dotted line) and using the intelligent practical continuous casting billet weight for resetting ruler on-line control system (shown in solid in diagram) surely of the invention
Measure control effect comparison.The pivot weight of continuous casting billet is 2203kg, using traditional scale Compensating Control, continuous casting billet weight
Deviation is ± 8kg, and control of the invention is used to calculate, and continuous casting billet deviation of weight is ± 3kg, it is seen then that using continuous casting billet intelligence
Surely ruler on-line control system is reset, continuous casting billets of fixed weight precision can be steadily controlled, to improve the economic benefit of enterprise.
Claims (12)
1. a kind of continuous casting billet intelligently resets ruler on-line control system surely, it is characterised in that: the system includes input module, data
Acquisition module, data memory module, communication module, core calculation module, output module and execution module；Pass through input module
Parameter setting is carried out to control system；Data acquisition module is connect with data memory module, core calculation module, data acquisition module
Block passes through communication module continuous collecting continuous casting billet Real-time Production Process course data trace information, cutting machine playback deviation, continuous casting
Weigh after base cutting and the information such as production manager level MES system data, data collecting module collected to information be transmitted to data
Memory module, core calculation module；Data storage is carried out by data memory module；It is realized using communication module as control system
The tie of basic data interaction, realizes data acquisition module and production manager level MES system and Basic automation level PLC system number
According to communication；Core calculation module from data acquisition module obtain real-time working condition data and from data memory module obtain course with
Track data carry out data diagnosis and calculation processing；The result of core calculation module is exported to execution module by output module；
The result for the core calculation module that execution module is passed over according to output module realizes the Length-fixing cutting to continuous casting billet.
2. continuous casting billet according to claim 1 intelligently resets ruler on-line control system surely, it is characterised in that: the continuous casting billet
It further includes monitoring interface module that intelligence resets ruler on-line control system surely, and monitoring interface module shows to come in the form of " number, table "
From data acquisition module, data memory module, communication module, core calculation module, the data of output module, production process is realized
Visualization.
3. continuous casting billet according to claim 1 intelligently resets ruler on-line control system surely, it is characterised in that: the communication mould
Block uses the measure of two-stage interlock protection, realizes free switching and emergency handoff functionality.
4. continuous casting billet according to claim 1 intelligently resets ruler on-line control system surely, it is characterised in that: the data are adopted
Collect module and use continuous casting billet process data course information tracking method, along continuous casting billet traffic direction, continuous casting billet virtual grate
At several cell blocks, using each cell block as independent information unit, originated from molten steel solidification starting point, according to certain week
Phase continuously carries out tracking and monitoring to the information data of each cell block carrying, and record to control end point terminates, and is formed complete
Continuous casting billet corresponds to Dynamic Tracking Data.
5. continuous casting billet according to claim 4 intelligently resets ruler on-line control system surely, it is characterised in that: the control knot
Beam spot setting maximum scale end, information data that the cell block is carried as independent information unit after continuous casting billet cutting
Including cell block self attributes, production status data attribute, production signal attribute and production event attribute.
6. continuous casting billet according to claim 1 intelligently resets ruler on-line control system surely, it is characterised in that: the data are adopted
Collect module and use the continuous casting fixed-length compensation method based on cutting machine playback separate-blas estimation, in continuous cast stock cutter moving direction
One basic point of upper determination installs laser range finder in base position, the reference distance of basic point Yu cutting machine origin is determined, in PLC
Reference distance setting is carried out in system；Before preparing to cut work, determine that cutting machine has playbacked；Returned with laser range finder measurement
The actually located position of cutting machine (relative to basic point) distance behind position, gives PLC system data transfer laser range finder；
Cutting machine is for the distance of basic point and the deviation of reference distance after calculating measurement gained playback by PLC system；Judgement calculates
Whether deviation out is more than continuous casting billet cutting tolerance range, if so, the cutting machine before cutting to continuous casting billet
When traveling, the stroke with deviation to cutting machine is compensated.
7. continuous casting billet according to claim 6 intelligently resets ruler on-line control system surely, it is characterised in that: the data are adopted
Collect module and uses the continuous casting fixed-length compensation device based on cutting machine playback separate-blas estimation, including cutting machine, running track, institute
It states cutting machine to be located on running track (3), there is burning torch on cutting machine, further include laser range finder, laser range finder support frame, survey
Away from target, PLC system and scale system, laser range finder is fixed on laser range finder support frame, laser range finder support frame
Positioned at one end of running track, ranging target face laser range finder is arranged on cutting machine, and laser range finder and PLC system connect
Connect, PLC system is connect with scale system, after laser range finder playbacks measured cutting machine Distance Transmission to PLC system, when
Distance offsets go beyond the scope after cutting machine playback, then deviation is transferred to scale system balance scale setting value by PLC system.
8. continuous casting billet described in one of -7 intelligently resets ruler on-line control system surely according to claim 1, it is characterised in that: described
Core calculation module uses the continuous casting billets of fixed weight control method based on multi-model, and the method is controlled again by continuous casting billet feedforward is fixed
Submodel and continuous casting billet feedback control submodel construct partial model collection, and submodel constitutes corresponding submodel self adaptive control
Device is coordinated to realize submodel self adaptive control by submodel adaptive controller, defeated using multiple submodel adaptive controllers
Weighted sum out realizes submodel switching control continuous casting billets of fixed weight.
9. continuous casting billet according to claim 8 intelligently resets ruler on-line control system surely, it is characterised in that: the continuous casting billet
Feedback control submodel is the length compensation control submodel based on on-line weighting system are as follows:
△Lm1=Ki(Li(G0-Gi)/Gi)
In formula:
△Lm1--- slab cuts scale offset, mm next time；
Li--- the scale of this cutting of slab；
G0--- slab pivot weight；
Gi--- the practical weighing weight of slab；
Ki--- length correction coefficient.
10. continuous casting billet according to claim 8 intelligently resets ruler on-line control system surely, it is characterised in that: the continuous casting
Base feed forward control method submodel includes controlling submodel based on cutting machine playback separate-blas estimation length compensation are as follows:
△Lm2=S1+S0
In formula:
△Lm2--- slab cuts scale offset next time；
S1--- cutting machine return is finally stopped position；
S0--- cutting machine benchmark origin position.
11. continuous casting billet according to claim 8 intelligently resets ruler on-line control system surely, it is characterised in that: the continuous casting
Base feedforward control submodel further includes the control submodel based on continuous casting billet density feature.
12. continuous casting billet according to claim 8 intelligently resets ruler on-line control system surely, it is characterised in that: the continuous casting
Base feedforward control submodel further includes with the submodel of the building of the frame mode of " sample data+training ".
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