CN102029367A - Quality event trigger determining method and device for continuous casting machine - Google Patents
Quality event trigger determining method and device for continuous casting machine Download PDFInfo
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Abstract
The invention provides a quality event trigger determining method for a continuous casting machine. The method comprises the following steps of: acquiring a value of a process parameter influencing quality of a casting body; calculating a value of a trigger expression according to the trigger expression and the value of the process parameter which are contained in a characteristic set for describing a pre-established quality event object, wherein the quality event object is defined on the basis of the process parameter, and the trigger expression is a function of the process parameter; and determining whether a quality event corresponding to the quality event object is triggered according to the value of the trigger expression and the preset trigger time; and if the value of the trigger expression is more than or equal to a preset threshold value, and the value of the trigger expression is more than or equal to duration of the preset threshold value and is more than or equal to the trigger time, determining that the quality event corresponding to the quality event object is triggered.
Description
Technical field
The present invention relates to field of metallurgy.Specifically, relate to a kind of quality Event triggered that is used for conticaster and determine method and apparatus.
Background technology
The continuous progress of and continuous casting technology more and more higher along with the energy-saving and cost-reducing requirement of metallurgical industry, have that energy consumption is low, the thin plate blank continuously casting and continuously rolling technology of reduced investment, lumber recovery height, advantage such as with short production cycle, strip continuous casting technology and with hot-loading and hot-conveying, directly rolling be the technology densification production procedure technology develop rapidly of representative, and adopted by numerous newly-built steel mills.Fig. 1 is the schematic diagram of the slab caster in modern times.As shown in Figure 1, Xian Dai blanket conticaster 10 generally includes the steel equipment that waters (tundish 2 of for example contain the ladle 1 of molten steel 20 usefulness, the molten steel hydrostatic pressing being controlled etc.), former (thereby for example molten steel is once cooled off the crystallizer 3 that forms casting stream 30a, usedly when casting stream 30a is carried out the secondary cooling many casting stream driven backing rolls 4 etc.) and cutting equipment (thereby whole casting streams that solidify that secondary cooling back forms being cut the flame cutting machine 5 that forms strand 30b etc.).
In casting process, molten steel 20 is from ladle 1 and tundish 2 crystallizer 3 that enters suitable for reading by crystallizer 3, by forming the casting stream 30a that the skin solidifies center is a molten steel behind 3 crystallisation by cooling of crystallizer, and pulls out from the crystallizer end opening.After casting stream 30a pulls out from the crystallizer end opening, carry out the secondary cooling, the forcing that drives backing roll row 4 (note, only show a part of backing roll 4 among the figure) at casting stream passed through a fixing passage down simultaneously.Casting stream 30a is driving in the process of backing roll row 4 by casting stream, forms straightway 31, bending section 33, arc section 35, aligning section 37 and horizontal segment 39 successively.When flow through secondary cooling and inside and outside when all having solidified of casting, form strand 30b by fiery cutter 5 cuttings.Hereinafter, casting stream 30a and strand 30b are referred to as the body of casting.
In casting process, process data (such as, liquid steel temperature, molten steel liquid level, mould liquid level fluctuation, crystallizer electromagnetic agitation, mold oscillation parameter, once cooling and secondary cooling parameter, pulling rate, strand temperature, smoothing roll pressure etc.) ANOMALOUS VARIATIONS can the quality of casting stream 30a be exerted an influence, thereby finally make strand 30b form defective.These defectives comprise internal soundness defective, surface quality defect and are mingled with that wherein internal soundness comprises segregation, loose shrinkage cavity, centre burst, triangle crackle; Surface quality defect comprises surperficial lobe, surperficial transverse fissure, pattern cracking, surperficial slag inclusion and pore etc.Simultaneously, the influence that the different casting miscarriages different with casting flow section shape (shape that depends on the crystallizer end opening) are given birth to steel grade of the ANOMALOUS VARIATIONS of process data is not identical completely.
In general, the unusual grade of the process data that occurs in the casting process is unfavorable for casting the incident that stream solidifies and influence the moulding slab quality easily and is called the quality incident.For example, this quality incident of ANOMALOUS VARIATIONS of process datas such as the flow of secondary cooling water and hydraulic pressure shows that the nozzle of secondary cooling water stops up, and it can cause off-square.And for example, the crystallizer outlet shows that with big this quality incident of distance of first row's nozzle shower water and crystallizer radiating rate do not match, and it can cause casting stream to form chink in the crystallizer exit.For another example, it is excessive that too low this quality incident of casting stream pulling rate can make the inner molten steel cools of crystallizer in the casting process, thereby cause the inner steel billet blackening of crystallizer.
The monitoring system of conticaster is gathered the process data of each link that influences slab quality in casting process, determine based on the process data that collects whether the quality incident is triggered, if the quality incident is triggered, just show the quality generation harmful effect of the variation meeting of described process data to casting stream, if and definite quality incident is not triggered, show that then the variation of described process data belongs to normal fluctuation.Then, the quality incident of having determined to trigger is to the coverage and the degree of casting stream, thereby instructs continuous casting production.
Therefore, determine that by process data whether the quality incident is triggered is the very important function of conticaster monitoring system.Yet in the conticaster monitoring system abroad, definite method of quality Event triggered is covert.This may be a problem of considering technical know-how and security of system (if definite method of quality Event triggered is unreasonable, may cause the collapse of system).In general, the technical staff of conticaster monitoring system can debug the triggering rule of mass of system incident in watering of regulation is inferior according to the steel grade of stipulating in the contract, delivers to customer then to use.The Adjustment System parameter maybe needs to develop new steel grade if desired, then needs to ask the technical staff to go into factory.This expense is very high.The external conticaster monitoring system why Here it is much buys is not at high price brought into play the basic reason of fine effect at home.
In other words, can't debug the triggering rule of quality incident voluntarily and can bring following problem.At first, the site operation personnel often has comparatively deep cognition to casting machine state, the condition of production.Can't debug the triggering rule of quality incident voluntarily these experiences and cognition are wasted, be unfavorable for enhancing productivity.Secondly, As time goes on the operating mode of casting machine can change.Ageing equipment makes original debugging quality Event triggered rule well may not meet current casting machine operating mode with changing, if do not debug, just can't correctly monitor the unusual of conticaster.Moreover when needs exploitation new steel grade, old quality Event triggered rule can't satisfy new demand.
Summary of the invention
The present invention makes in order to solve the above-mentioned technical problem that exists in the prior art, its purpose is to provide a kind of quality Event triggered that is used for conticaster to determine method and apparatus, make the user can set up the triggering rule of quality incident voluntarily, produce, monitor and produce thereby instruct better.
According to an aspect of the present invention, provide a kind of quality Event triggered that is used for conticaster to determine method, this method can comprise: the value that obtains the process variable that the quality to the body of casting exerts an influence; According to the triggering expression formula that comprises in the feature set that is used for describing the quality event object that is pre-created and the value of described process variable, calculate the value of described triggering expression formula, wherein said quality event object defines based on described process variable, and described triggering expression formula is the function of described process variable; According to the value and the predefined triggered time of described triggering expression formula, determine whether be triggered with the corresponding quality incident of described quality event object, wherein, if the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then be defined as being triggered with the corresponding quality incident of described quality event object, if the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then be defined as not being triggered with the corresponding quality incident of described quality event object.
Preferably, described feature set can comprise identifier, triggers expression formula, positional parameter, effect parameter and enable parameter, wherein, described positional parameter can comprise the origin information and the length information of the coverage that is used for definite described quality event object, and described effect parameter can comprise the defective incidence that produces one or more defectives with the corresponding quality incident of described quality event object on the described body of casting.
Preferably, described triggering expression formula can also be the function of the variable relevant with body of casting section configuration with body of casting steel grade, described positional parameter can be the variable relevant with body of casting section configuration with body of casting steel grade, and described effect parameter can be the variable relevant with body of casting section configuration with body of casting steel grade.
Preferably, determine that the step that whether is triggered with the corresponding quality incident of described quality event object can comprise: in the value of judging described triggering expression formula during more than or equal to described predetermined threshold, the identifier of determining this quality event object whether in interim quality event object tabulation, described interim quality event object list storage to begin to carry out to the quality incident corresponding with this quality event object trigger the value that triggers expression formula when judging separately be judged as lasting more than or equal to the previous quality event object of predetermined threshold separately identifier and this value more than or equal to duration of predetermined threshold separately; If the identifier of this quality event object is in described interim quality event object tabulation, then the described duration in the described interim quality event object tabulation is increased predetermined amount of time, as the value of the triggering expression formula corresponding current duration more than or equal to described predetermined threshold with this quality event object; The current duration and the described triggered time that are obtained are compared, to judge whether the quality incident corresponding with this quality event object is triggered.Wherein, in current duration that is obtained during more than or equal to described triggered time, be judged as the quality incident corresponding and be triggered, and from described interim quality event object tabulation, delete the identifier of this quality event object and the duration corresponding with this quality event object with this quality event object; In current duration that is obtained during, be judged as the quality incident corresponding and be not triggered with this quality event object less than described triggered time.
In addition, in the value of described triggering expression formula during less than described predetermined threshold, judge that the quality incident corresponding with this quality event object is not triggered, and when the identifier of this quality event object is in described interim quality event object tabulation, the identifier of this quality event object of deletion and the duration corresponding from described interim quality event object tabulation with this quality event object; In the value of described triggering expression formula when the identifier of described predetermined threshold and this quality event object is not in described interim quality event object tabulation, with described predetermined amount of time as the duration corresponding with this quality event object, and should the duration and the identifier of this quality event object be stored in the described interim quality list of thing.
According to a further aspect in the invention, provide a kind of quality Event triggered that is used for conticaster to determine device, it comprises: quality event object creating unit, be used for the process variable that exerts an influence based on quality to the body of casting, establishment is used to produce the quality event object of quality incident, described quality event object is by comprising the feature set description that triggers expression formula at least, and wherein said quality event object defines based on described process variable, and described triggering expression formula is the function of described process variable; Acquiring unit is used to obtain the value of described process variable; Computing unit is used for the value of the triggering expression formula that comprises according to the feature set of being created and the process variable that is obtained, and calculates the value of described triggering expression formula; Trigger determining unit, be used for value and predefined triggered time according to described triggering expression formula, determine whether be triggered with the corresponding quality incident of described quality event object, wherein, if the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then described triggering determining unit is defined as being triggered with the corresponding quality incident of described quality event object, if the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then described triggering determining unit is defined as not being triggered with the corresponding quality incident of described quality event object.
Preferably, described triggering determining unit can comprise: first judging unit, be used in the value of judging described triggering expression formula during more than or equal to described predetermined threshold, the identifier of judging this quality event object whether in interim quality event object tabulation, described interim quality event object list storage to begin to carry out to the quality incident corresponding with this quality event object trigger the value that triggers expression formula when judging separately be judged as lasting more than or equal to the previous quality event object of predetermined threshold separately identifier and this value more than or equal to duration of predetermined threshold separately; The duration updating block, if the identifier of this quality event object is in described interim quality event object tabulation, the duration updating block increases predetermined amount of time with the described duration in the described interim quality event object tabulation, as the value of the triggering expression formula corresponding with this quality event object current duration more than or equal to described predetermined threshold; Second judging unit, the current duration and the described triggered time that are used for being obtained compare, to judge whether the quality incident corresponding with this quality event object is triggered; And delete cells, be used for from the identifier of described interim this quality event object of quality event object tabulation deletion and the duration corresponding with this quality event object, wherein, in current duration that is obtained during more than or equal to described triggered time, second judgment unit judges is triggered for the quality incident corresponding with this quality event object, and the identifier of described delete cells this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object, when current duration that is obtained during less than described triggered time, second judgment unit judges is not triggered for the quality incident corresponding with this quality event object.
In addition, in the value of described triggering expression formula during less than described predetermined threshold, first judgment unit judges is not triggered for the quality incident corresponding with this quality event object, and when the identifier of this quality event object is in described interim quality event object tabulation, the identifier of delete cells this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object.
Moreover, described quality Event triggered determines that device can also comprise: adding device, the value that to be used for when described first judgment unit judges be described triggering expression formula more than or equal to the identifier of described predetermined threshold and this quality event object not when the described interim quality event object tabulation, with described predetermined amount of time as the duration corresponding with this quality event object, and should the duration and the identifier of this quality event object be stored in the described interim quality list of thing.
Description of drawings
By the content of reference below in conjunction with the description of the drawings and claims, other purpose of the present invention and result will understand and should be readily appreciated that more.In the accompanying drawings:
Fig. 1 is the schematic diagram of the slab caster in modern times;
Fig. 2 shows the flow chart of the method for determining according to the described quality Event triggered that is used for conticaster of the embodiment of the invention;
Fig. 3 shows and judges the flow chart of an example implementation method that whether is triggered with the corresponding quality incident of quality event object according to the value that triggers expression formula and triggered time among the present invention;
Fig. 4 shows the block diagram that the quality Event triggered that is used for conticaster of the present invention is determined device; And
Fig. 5 shows the quality Event triggered that is used for conticaster of the present invention and determines that an example of device triggers the block diagram of determining unit.
The specific embodiment
In the following description, for purposes of illustration,, many details have been set forth for the complete understanding to one or more embodiment is provided.Yet, clearly, can not have to realize these embodiment under the situation of these details yet.In other example, one or more for convenience of description embodiment, known structure and equipment illustrate with the form of block diagram.
Come below with reference to accompanying drawings each embodiment according to the present invention is described in detail.
Before carrying out determining method according to the quality Event triggered that is used for conticaster of the present invention, at first need the process variable that exerts an influence according to the quality of the body of casting, establishment is used to produce the quality event object of quality incident, this quality event object is by comprising the feature set description that triggers expression formula at least, and described triggering expression formula is used to judge whether described quality incident is triggered.When creating the quality event object, at first, determine the quality of the body of casting is produced one or more process variables of specific effect, described process variable for example comprises liquid steel temperature, molten steel liquid level, mould liquid level fluctuation, crystallizer electromagnetic agitation, mold oscillation parameter, once cools off and secondary cooling parameter, pulling rate, strand temperature, smoothing roll pressure etc.
Then, based on determined process variable, create the quality event object, wherein, described quality event object is described by feature set, described feature set comprise quality event object for example base attribute, trigger attribute, location attribute and effect attribute, described triggering attribute comprises at least and is used to the triggering expression formula of judging whether described quality incident is triggered.
The base attribute of quality event object comprises identifier and enables parameter, wherein, identifier is used for distinguishing each quality event object, enable parameter and be used for determining whether this quality event object is effective, enabling parameter is the variable of a Boolean type, and when the value that enables parameter was " very ", the quality event object of being created was effective, when the value that enables parameter was " vacation ", the quality event object of being created was invalid.In addition, the base attribute of quality event object can also comprise casting stream, triggered time of description, the influence of object etc.
The triggering attribute of quality event object comprises that at least the described triggering expression formula of triggering expression formula is expressed as the function of described process variable.Described triggering expression formula can also be the function of the variable in the described variables set, and wherein, the variable in the variables set is relevant with body of casting section configuration with body of casting steel grade.Trigger the value of expression formula and can represent whether be triggered with the corresponding quality incident of described quality event object.Described triggering attribute can also comprise the variables set that for example triggers the variable that relates in the expression formula.
Described location attribute comprises positional parameter, and positional parameter is used for determining the coverage of described quality event object, can comprise the origin information and the length information of described coverage.For example, described origin information can be the starting point of coverage of described quality event object with respect to for example distance of flame cutting machine 5, and described length information can be the length of the coverage of described quality event object.Positional parameter is the variable relevant with body of casting section configuration with body of casting steel grade.
Described effect attribute comprises effect parameter, and effect parameter is used for determining to produce on the described body of casting with the corresponding quality incident of described quality event object the defective incidence of one or more defectives.For example, effect parameter can comprise the defective incidence of the internal flaw that produces with the corresponding quality incident of described quality event object, the defective incidence of blemish and the defective incidence of inclusion defect on the described body of casting.Described effect parameter is the variable relevant with body of casting section configuration with body of casting steel grade.
Illustrate the establishment of quality event object below.
Submersed nozzle is the pipeline between middle bag and crystallizer.Submersed nozzle is inserted in crystallizer inside, and the molten steel in the guiding in the bag flows in the crystallizer equably.In the casting machine continuous casting process, because the erosion of molten steel is changed a mouth of a river to guarantee molten steel purity every 6-8 hour needs.But when changing the mouth of a river, the pulling rate of casting stream can reduce, and causes the inner molten steel cools of crystallizer excessive, thereby causes the steel billet blackening of crystallizer inside.
The pulling rate of casting stream can be defined as the quality of the body of casting is produced a process variable of specific effect.Based on this process variables, create a quality event object Object1.This quality event object Object1 can represent with a record.For example:
Object1={ identifier=N; Describe=" pulling rate is too low "; Casting stream=the k of influence; Triggered time=T; Enable parameter=True/False; Process variable=speed; Variable 1=VAR01; Triggering expression formula=If ((Mold==1) AND (speed＜=VAR01)) { Return 1}else{Return 0}; Origin information=bias; Length information=Afflen; Surface defect rate=P1; Internal flaw rate=P2; Inclusion defect rate=P3}
Wherein, trigger expression formula
{ Return 1}else{Return 0} resolves to If ((Mold==1) AND (speed＜=VAR01)), and when mouth of a river signal arrives (Mold==1) and pulling rate (speed) during less than VAR01, the value that triggers expression formula is 1, otherwise the value of expression formula is 0.Wherein VAR01 is a variable, and its value is relevant with body of casting section configuration with steel grade.
Also can adopt the method for the succession in the OOP to create described quality event object, comprise and set up parent quality event class, set up and to have inherited the subclass quality event class of described parent quality event class and to have defined quality event object in the described subclass quality event class.This method is known for the programming personnel in this area, omits here its description.The advantage of this method is to debug more flexible.
Fig. 2 shows the flow chart that the quality Event triggered that is used for conticaster of the present invention is determined method.
As shown in Figure 2, at first, in step S210, obtain the value of the process variable that the quality to the body of casting exerts an influence.Be the pulling rate that obtains casting stream in the above example.After the value that has obtained described process variable, in step S220,, calculate the value of described triggering expression formula according in the included triggering expression formula of the feature set that is used for the describing mass event object that is pre-created and the value of described process variable.In the above example, calculate according to following triggering expression formula.
If((Mold＝＝1)AND(speed＜＝VAR01)){Return?1}else{Return?0}
When the value that triggers expression formula is 1, show that corresponding quality incident might be triggered.In this case, for the variation of distinguishing described process variable be disturb or fluctuation due to, or induced fault, the value that need see described triggering expression formula is more than or equal to duration of predetermined threshold (being 1 in this example) long enough whether.If the value of the process variable that is obtained in the sampling period of predetermined plurality of continuous all makes the value that triggers expression formula more than or equal to predetermined threshold, so just think that the value of described triggering expression formula is more than or equal to the duration long enough of predetermined threshold, this shows that the variation of this process variable has produced the quality incident, otherwise, just think that the variation of this process variable is provisional, be due to interference or the fluctuation, do not produce the quality incident.
Therefore, be default triggered time of the quality event object of being created, during greater than described triggered time, this quality event object just produces a quality incident corresponding with it to the value of triggering expression formula that makes this quality event object when the value of the process variable that is obtained more than or equal to duration of predetermined threshold.
In step S230, whether the value of judging described triggering expression formula more than or equal to predetermined threshold, and the value of in step S240, judging described triggering expression formula more than or equal to duration of described predetermined threshold whether more than or equal to the described triggered time.If the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then be defined as being triggered with the corresponding quality incident of described quality event object in step S250 value, if the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then be defined as not being triggered with the corresponding quality incident of described quality event object in step S260 value.
The explanation that Fig. 3 shows among the present invention is judged an example implementation method that whether is triggered with the corresponding quality incident of quality event object according to value that triggers expression formula and triggered time.
In the value of beginning acquisition process parameter, set up an interim quality event object tabulation, described interim quality event object list storage to begin to carry out to the quality incident corresponding with this quality event object trigger the value that triggers expression formula when judging separately be judged as lasting more than or equal to the previous quality event object of predetermined threshold separately identifier and this value more than or equal to duration of predetermined threshold separately.For example, establish process variable and for example be { v, Q
m, m=1,2,3...}, wherein v is a pulling rate, Q
mBe in other process variable (such as, the electric current of the flow of the flow of mold oscillation parameter, primary cooling water and hydraulic pressure, secondary cooling water and hydraulic pressure, driven roller, gently depress, strand temperature etc.).According to the value of the process variable that is obtained, calculate the triggering expression formula { f of each quality event object
n, the value of n=1,2,3...}.If certain value that triggers expression formula is calculated as the predetermined threshold of setting greater than for this triggering expression formula, then will trigger the pairing quality event object of expression formula (comprising features such as its identifier) adds in the interim quality event object tabulation, and a preset time section (for example, sampling period) is made as the current duration of the value of the triggering expression formula corresponding with this quality event object greater than predetermined threshold.
Then, as shown in Figure 3, in step S310, whether the value of triggering expression formula of judging the quality event object greater than predetermined threshold, and in step S320, and whether the identifier of judging described quality event object is in described interim quality event object tabulation.Can produce 4 kinds of judged results according to above-mentioned two steps.
If one of 4 kinds of judged results that step S310 and step 320 produced are present in the described interim quality event object tabulation for the value of the described triggering expression formula identifier more than or equal to certain threshold level and described quality event object, then in step S330, to increase described predetermined amount of time with this corresponding duration of quality event object in the described interim quality event object tabulation, as the value of the triggering expression formula corresponding current duration more than or equal to described predetermined threshold with this quality event object, then in step S340, the current duration and the described triggered time that are obtained are compared, to judge whether the quality incident corresponding with this quality event object is triggered.If the current duration that is obtained is more than or equal to the described triggered time, then in step S350, be judged as the quality incident corresponding and be triggered, and from described interim quality event object tabulation, delete the identifier of this quality event object and the duration corresponding with this quality event object with this quality event object.The reason of deleting the quality event object here is, this quality event object has produced a quality incident, if follow-uply then produce same quality incident, still need from the beginning to calculate the duration of the value of the triggering expression formula corresponding greater than predetermined threshold with its quality event object.If in step S340, be judged as current duration of being obtained less than the described triggered time, then in step S360, be judged as the quality incident corresponding and be not triggered, in interim quality list of thing, keep the information relevant simultaneously with this quality event object with this quality event object.
If one of 4 kinds of judged results that step S310 and step 320 produced for the value of described triggering expression formula more than or equal to the identifier of described predetermined threshold and this quality event object not in described interim quality event object tabulation, then in step S370, be judged as with the corresponding quality incident of this quality event object and be not triggered, then this quality event object (comprising its identifier) is added in the described interim quality list of thing, and with described predetermined amount of time (for example, sampling period) as the value of the triggering expression formula corresponding with this quality event object greater than the predetermined threshold duration.
If one of 4 kinds of judged results that step S310 and step 320 produced are present in the described interim quality event object tabulation for the value of the described triggering expression formula identifier less than described predetermined threshold and this quality event object, then in step S380, be judged as with the corresponding quality incident of this quality event object and be not triggered, and from described interim quality event object tabulation the deletion information (as identifier and duration etc.) relevant with this quality event object.The reason of deleting the quality event object here is, thinks that the value of the triggering expression formula that before obtained is because the fluctuation of process variable or disturb does not causedly form the quality incident greater than the incident of predetermined threshold.
If one of 4 kinds of judged results that step S310 and step 320 produced for the value of described triggering expression formula less than the identifier of described predetermined threshold and this quality event object not in described interim quality event object tabulation, then do not take place whatever, directly carry out follow-up step.
As above the body of casting quality judging method that is used for conticaster of the present invention has been described referring to figs. 1 through Fig. 5.The body of casting quality judging method that is used for conticaster of the present invention can adopt software to realize, also can adopt hardware to realize, or adopts the mode of software and hardware combination to realize.
Fig. 4 shows the block diagram that the quality Event triggered that is used for conticaster of the present invention is determined device.
As shown in Figure 4, the quality Event triggered that is used for conticaster of the present invention determines that device 400 comprises quality event object creating unit 410, acquiring unit 420, computing unit 430 and triggers determining unit 440.
Carrying out before the quality Event triggered determines, quality event object creating unit 410 is used for the process variable that exerts an influence based on the quality to the body of casting, establishment is used to produce the quality event object of quality incident, described quality event object is by comprising the feature set description that triggers expression formula at least, wherein said quality event object defines based on described process variable, and described triggering expression formula is the function of described process variable.
Carrying out the quality Event triggered when determining, at first, acquiring unit 420 obtains the value of described process variable.After obtaining the value of described process variable, computing unit 430 calculates the value of described triggering expression formula according to the value of the triggering expression formula that comprises in the feature set of being created with the process variable that is obtained.
Then, trigger value and the predefined triggered time of determining unit 440, determine whether be triggered with the corresponding quality incident of described quality event object, the described triggered time for example is several sampling periods according to described triggering expression formula.
If the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then described triggering determining unit 440 is defined as being triggered with the corresponding quality incident of described quality event object.If the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then described triggering determining unit 440 is defined as not being triggered with the corresponding quality incident of described quality event object.
In a preferred embodiment, as shown in Figure 5, trigger determining unit 440 and can comprise first judging unit 510, duration updating block 520, second judging unit 530 and delete cells 540.
First judging unit 510 is used in the value of judging described triggering expression formula during more than or equal to described predetermined threshold, and whether the identifier of judging this quality event object is in described interim quality event object tabulation.
If the identifier of this quality event object is in described interim quality event object tabulation, duration updating block 520 increases predetermined amount of time with the described duration in the described interim quality event object tabulation, as the value of the triggering expression formula corresponding with this quality event object current duration more than or equal to described predetermined threshold.
Current duration and described triggered time that second judging unit 530 is used for being obtained compare, to judge whether the quality incident corresponding with this quality event object is triggered.
In current duration that is obtained during more than or equal to described triggered time, second judging unit 530 is judged as the quality incident corresponding with this quality event object and is triggered, and the identifier of described delete cells 540 this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object.
If first judging unit 510 is judged as the value of described triggering expression formula less than described predetermined threshold, then corresponding with this quality event object quality incident is not triggered, when the identifier of this quality event object is in described interim quality event object tabulation, the identifier of delete cells 540 this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object.
In addition, preferably, described triggering determining unit 440 can also comprise adding device 550.When value that described first judging unit 510 is judged as described triggering expression formula when the identifier of described predetermined threshold and this quality event object is not in described interim quality event object tabulation, adding device 550 with described predetermined amount of time as the duration corresponding with this quality event object, and should the duration and the identifier of this quality event object be stored in the described interim quality list of thing.
According to quality Event triggered of the present invention determine method and device can be used for slab quality judge with the product quality diagnostic system (Quality Estimation System, QES).
Although the disclosed content in front shows exemplary embodiment of the present invention, should be noted that under the prerequisite of the scope of the invention that does not deviate from the claim qualification, can carry out multiple change and modification.The function of the described claim to a method of inventive embodiments described herein, step and/or action do not need to carry out with any particular order.In addition, although element of the present invention can be with individual formal description or requirement, also it is contemplated that a plurality of, unless clearly be restricted to odd number.
Although disclose the present invention in conjunction with the preferred embodiment that is shown specifically and describes, but those skilled in the art are to be understood that, for the quality event triggering method and the device that are used for conticaster that the invention described above proposed, can also on the basis that does not break away from content of the present invention, make various improvement.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (18)
1. a quality Event triggered that is used for conticaster is determined method, comprising:
The value of the process variable that acquisition exerts an influence to the quality of the body of casting;
According to the triggering expression formula that comprises in the feature set that is used for describing the quality event object that is pre-created and the value of described process variable, calculate the value of described triggering expression formula, wherein said quality event object defines based on described process variable, and described triggering expression formula is the function of described process variable;
According to the value and the predefined triggered time of described triggering expression formula, determine whether be triggered with the corresponding quality incident of described quality event object,
Wherein, if the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then be defined as being triggered with the corresponding quality incident of described quality event object.
2. quality Event triggered as claimed in claim 1 is determined method, wherein, if the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then be defined as not being triggered with the corresponding quality incident of described quality event object.
3. quality Event triggered as claimed in claim 1 is determined method, and wherein, described feature set comprises identifier, triggers expression formula, positional parameter, effect parameter and enables parameter.
4. quality Event triggered as claimed in claim 3 is determined method, and wherein, described positional parameter comprises the origin information and the length information of the coverage that is used for definite described quality event object.
5. quality Event triggered as claimed in claim 3 is determined method, and wherein, described effect parameter comprises the defective incidence that produces one or more defectives with the corresponding quality incident of described quality event object on the described body of casting.
6. quality Event triggered as claimed in claim 1 is determined method, and wherein, described triggering expression formula is the function of the variable relevant with body of casting section configuration with body of casting steel grade still.
7. quality Event triggered as claimed in claim 3 is determined method, and wherein, described positional parameter is the variable relevant with body of casting section configuration with body of casting steel grade.
8. quality Event triggered as claimed in claim 3 is determined method, and wherein, described effect parameter is the variable relevant with body of casting section configuration with body of casting steel grade.
9. determine method as the described quality Event triggered of any one claim in the claim 3 to 8, wherein, when the quality incident that will trigger judgement comprises one or more quality incident, determine that the step that whether is triggered with the corresponding quality incident of described quality event object comprises:
In the value of judging described triggering expression formula during more than or equal to described predetermined threshold, the identifier of determining this quality event object whether in interim quality event object tabulation, described interim quality event object list storage to begin to carry out to the quality incident corresponding with this quality event object trigger the value that triggers expression formula when judging separately be judged as lasting more than or equal to the previous quality event object of predetermined threshold separately identifier and this value more than or equal to duration of predetermined threshold separately;
If the identifier of this quality event object is in described interim quality event object tabulation, then the described duration in the described interim quality event object tabulation is increased predetermined amount of time, as the value of the triggering expression formula corresponding current duration more than or equal to described predetermined threshold with this quality event object;
The current duration and the described triggered time that are obtained are compared, whether are triggered with the judgement quality incident corresponding with this quality event object,
Wherein, in current duration that is obtained during more than or equal to described triggered time, be judged as the quality incident corresponding and be triggered, and from described interim quality event object tabulation, delete the identifier of this quality event object and the duration corresponding with this quality event object with this quality event object.
10. quality Event triggered as claimed in claim 9 is determined method, wherein, in current duration that is obtained during less than described triggered time, is judged as the quality incident corresponding with this quality event object and is not triggered.
11. quality Event triggered as claimed in claim 9 is determined method, wherein, during less than described predetermined threshold, judges that the quality incident corresponding with this quality event object is not triggered in the value of described triggering expression formula, and
When the identifier of this quality event object is in described interim quality event object tabulation, the identifier of this quality event object of deletion and the duration corresponding from described interim quality event object tabulation with this quality event object.
12. quality Event triggered as claimed in claim 9 is determined method, wherein, in the value of described triggering expression formula when the identifier of described predetermined threshold and this quality event object is not in described interim quality event object tabulation, with described predetermined amount of time as the duration corresponding with this quality event object, and should the duration and the identifier of this quality event object be stored in the described interim quality list of thing.
13. a quality Event triggered that is used for conticaster is determined device, comprising:
Quality event object creating unit, be used for the process variable that exerts an influence based on quality to the body of casting, establishment is used to produce the quality event object of quality incident, described quality event object is by comprising the feature set description that triggers expression formula at least, wherein said quality event object defines based on described process variable, and described triggering expression formula is the function of described process variable;
Acquiring unit is used to obtain the value of described process variable;
Computing unit is used for the value of the triggering expression formula that comprises according to the feature set of being created and the process variable that is obtained, and calculates the value of described triggering expression formula;
Trigger determining unit, be used for value and predefined triggered time, determine whether be triggered with the corresponding quality incident of described quality event object according to described triggering expression formula,
Wherein, if the value of described triggering expression formula is more than or equal to predetermined threshold, and the value of described triggering expression formula more than or equal to duration of described predetermined threshold more than or equal to the described triggered time, then described triggering determining unit is defined as being triggered with the corresponding quality incident of described quality event object.
14. quality Event triggered as claimed in claim 13 is determined device, wherein, if the value of described triggering expression formula is less than described predetermined threshold, or the value of described triggering expression formula more than or equal to duration of described predetermined threshold less than the described triggered time, then described triggering determining unit is defined as not being triggered with the corresponding quality incident of described quality event object.
15. quality Event triggered as claimed in claim 13 is determined device, wherein, described triggering determining unit comprises:
First judging unit, be used in the value of judging described triggering expression formula during more than or equal to described predetermined threshold, the identifier of judging this quality event object whether in interim quality event object tabulation, described interim quality event object list storage to begin to carry out to the quality incident corresponding with this quality event object trigger the value that triggers expression formula when judging separately be judged as lasting more than or equal to the previous quality event object of predetermined threshold separately identifier and this value more than or equal to duration of predetermined threshold separately;
The duration updating block, if the identifier of this quality event object is in described interim quality event object tabulation, the duration updating block increases predetermined amount of time with the described duration in the described interim quality event object tabulation, as the value of the triggering expression formula corresponding with this quality event object current duration more than or equal to described predetermined threshold;
Second judging unit, the current duration and the described triggered time that are used for being obtained compare, to judge whether the quality incident corresponding with this quality event object is triggered; And
Delete cells was used for from the identifier of described interim this quality event object of quality event object tabulation deletion and the duration corresponding with this quality event object,
Wherein, in current duration that is obtained during more than or equal to described triggered time, second judgment unit judges is triggered for the quality incident corresponding with this quality event object, and the identifier of described delete cells this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object.
16. quality Event triggered as claimed in claim 15 is determined device, wherein,
When current duration that is obtained during less than described triggered time, second judgment unit judges is not triggered for the quality incident corresponding with this quality event object.
17. quality Event triggered as claimed in claim 15 is determined device, wherein, during less than described predetermined threshold, first judgment unit judges is not triggered for the quality incident corresponding with this quality event object in the value of described triggering expression formula, and
When the identifier of this quality event object is in described interim quality event object tabulation, the identifier of delete cells this quality event object of deletion from described interim quality event object tabulation and the duration corresponding with this quality event object.
18. quality Event triggered as claimed in claim 15 is determined device, also comprises:
Adding device, the value that to be used for when described first judgment unit judges be described triggering expression formula more than or equal to the identifier of described predetermined threshold and this quality event object not when the described interim quality event object tabulation, with described predetermined amount of time as the duration corresponding with this quality event object, and should the duration and the identifier of this quality event object be stored in the described interim quality list of thing.
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| CN103100678A (en) * | 2013-01-15 | 2013-05-15 | 中冶南方工程技术有限公司 | Online control system and method of influencing parameters of continuous casting defects |
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| CN101844215A (en) * | 2009-03-27 | 2010-09-29 | 宝山钢铁股份有限公司 | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode |
| CN101704079A (en) * | 2009-09-28 | 2010-05-12 | 田陆 | Control method for casting of continuous-cast billet |
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| CN103100678A (en) * | 2013-01-15 | 2013-05-15 | 中冶南方工程技术有限公司 | Online control system and method of influencing parameters of continuous casting defects |
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