CN107096899A

CN107096899A - The crystallizer bleedout prediction electric thermo system that a kind of logic-based judges

Info

Publication number: CN107096899A
Application number: CN201710346785.1A
Authority: CN
Inventors: 何飞; 张玲颖; 张林林
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2017-05-17
Filing date: 2017-05-17
Publication date: 2017-08-29
Anticipated expiration: 2037-05-17
Also published as: CN107096899B

Abstract

The invention belongs to metallurgical continuous casting controlling of production process field, the crystallizer bleedout prediction electric thermo system judged more specifically to a kind of logic-based.The hardware composition part of the present invention includes fourplatemold and thermocouple, steel leakage prediction system computer, PLC, interchanger, thermocouple compensation cable, audible-visual annunciator, relay, distant station, in addition to data acquisition unit, bleed-out data compress memory cell, self study and off-line analysis unit, alarm and execution unit automatically；Wherein, steel leakage prediction system computer includes client and server computer, and client computer is used for the monitoring display of bleed-out data；Wherein, thermocouple bury columns and rows spacing design to bond tearing port it is identical the time required to one thermocouple spacing of horizontal and vertical propagation.The present invention realizes the promptly and accurately forecast to bonding steel leakage, it is ensured that continuous casting direct motion and raising slab quality.

Description

The crystallizer bleedout prediction electric thermo system that a kind of logic-based judges

Technical field

The invention belongs to metallurgical continuous casting controlling of production process field, judge more specifically to a kind of logic-based Crystallizer bleedout prediction electric thermo system.

Background technology

The fast development of high-efficient continuous casting technology is modernized, high-quality continuous casting billet is not required nothing more than, and requires high pulling rate, is bonded Bleed-out is always an important problem for restricting high casting speed continuous casting, solves bonding steel leakage to ensureing that continuous casting direct motion and production are high Quality strand is significant, at present in addition to improving and inducing the process conditions that green shell is bonded, and its Main Means is that exploitation is high The fast crystallizer bleedout prediction electric thermo system of forecast accuracy, low rate of false alarm, response.The crystallizer bleedout prediction electric thermo system commonly used both at home and abroad The change of certain amount thermocouple measurement copper plate temperature is buried mainly in copper plate of crystallizer, is propagated based on V-type tearing port is bonded When electric thermo-couple temperature performance the spatial-temporal characteristics such as " time lag " and " temperature inversions ", using logic judgment algorithm or intelligently calculation Method recognizes these features, realizes the forecast of bonding steel leakage.Wherein, although intelligent algorithm is solving actual nonlinear problem tool There is preferable performance, but realize that simple, workable, real-time is high, reliability is high, easy care in view of logic judgment algorithm The advantages of, by broad practice in major steel mill's steel leakage prediction system.

On the various logic evaluation algorithm of breakout prediction, due to the difference that thermocouple is arranged and logic rules are designed, lead Cause algorithm performance and time of fire alarming to have very big difference, particularly in practical application, due to thermocouple failure or shell growth not It is uniform wait caused by electric thermo-couple temperature fluctuation, easily cause strike-alarm not in time, bond false alarm.Once strike-alarm is too late When, then it can not make to bond reparation so as to avoid bleed-out by dropping pulling rate measure；And false alarm can cause casting machine to drop suddenly each time Speed is shut down, and has a strong impact on the high-efficiency reform of slab quality and casting machine, huge economy can be all caused as bleed-out accident Loss.So in the logic judgment algorithm of design bonding, cohesive behavior is not only quoted in time, it is considered to alarm ageing, contracted Short alarm time, is that the reparation of follow-up bonding steel leakage creates favorable conditions, while must reduce false alarm as far as possible again.

Patent document CN101332499A discloses a kind of slab continuous-casting bleedout forecast control method, the forecast control method It is to be based on Thermocouple temperature change, realizes what bonding steel leakage judged by logic judgment algorithm.The forecast control method It is representative temperature waveform when judging that single thermocouple is bonded using temperature amplitude inspection and duration, and passes through neighboring thermocouple The time lag of temperature anomaly change considers cohesive vertical and horizontal dissemination, finally determines that the bleed-out of every thermocouple is several Rate, when the bleed-out probability for certain branch thermocouple occur reaches 95%, reduction pulling rate stops cast.Although the forecast control method one Determine the accuracy that degree improves breakout prediction, reduce error-alert degree, still, the forecast control method does not account for viscous Alarm time is tied and ageing, particularly when being checked using temperature amplitude, to single thermocouple sticking temperature waveform Recognize that time of fire alarming is later, cause not necessarily quote cohesive behavior in time, if later alarm, even if directly shutdown The reparation for bonding breach can not be ensured without bleed-out, if alarmed earlier, keep relatively low green shell to heal pulling rate with regard to that can make to glue Tie breach reparation, and and need not shut down, stop cast, and increase the unnecessary operating time, reduce production efficiency and increase Equipment loss.

Patent document CN102825234A discloses a kind of judgement alarm method of bonding steel leakage, and the judgement alarm method is (i.e. temperature is inverted) feature is intersected in the time lag and temperature curve of spatial variations based on multiple rows of electric thermo-couple temperature, is for bonding When representative temperature change waveform pattern or theoretical temperatures change waveform pattern and design, and in actual production process, and Not all sticking temperature change waveform pattern can all show " temperature inversion " phenomenon, and due to liquid steel level during actual production The influence of the factors such as fluctuation, covering slag performance, MOLTEN STEEL FLOW, thermocouple failure, often occurs thermoelectricity above and below copper plate of crystallizer Even temperature is inverted, or in the case of the non-adherent such as unsteady statecalculation, thermocouple failure, also often has larger thermocouple Temperature fluctuation, so also easily produces temperature phenomena of inversion, and institute's design in this way undoubtedly adds report by mistake and fail to report several Rate.

It is comprehensive that current steel leakage prediction system both at home and abroad and the investigation of logic judgment forecasting procedure are found, it is primarily present and asks as follows Topic：(1) thermocouple failure itself causes measured temperature anomalous variation, the judgement of influence breakout prediction algorithm and system.Such as：By In thermocouple quality problems itself, performance is unstable or thermocouple loses pyroelecthc properties, and temperature curve fluctuation is excessive；Thermocouple is filled It is bad with mode mistake or sealing, cause greasy dirt or cooling water to enter rear measurement temperature and actual temperature deviation greatly, make temperature Curve is in undulating；Occur distortion phenomenon in thermocouple signal transmitting procedure, fluctuate temperature curve.(2) open pour, tundish Change, pour eventually etc. in the case of unsteady statecalculation, larger is influenceed on electric thermo-couple temperature, can also increase the false alarm of algorithm；In theory As long as differentiating under various unsteady state conditions and bond the electric thermo-couple temperature waveform of process just can reduce wrong report, but real process, Sometimes electric thermo-couple temperature change closely bonds process temperature waveform under unsteady state condition, and this adds increased breakout prediction model The difficulty of design.(3) some important parameters of logic judgment algorithm depend on specific technique and appointed condition, as equipment is damaged The casting condition change such as consumption, material replacing, steel grade and covering slag, algorithm is more and more inaccurate.(4) although bond when single thermoelectricity Even temperature change over time " time lag " and " temperature inversion " feature of the multiple rows of multiple row electric thermo-couple temperature change in feature, space into Common recognition, is the foundation of breakout prediction logical algorithm design, although had nothing in common with each other according to the logic judgment algorithm of these characteristic Designs, But there is deficiency to forecast accuracy and considering for time of fire alarming.

In summary, how to overcome continuous casting breakout prediction method in the prior art and device forecast accuracy and alarm and It is not enough present on when property, it is the technical barrier of urgent need to resolve in the prior art.

The content of the invention

1. the invention technical problem to be solved

It is an object of the invention to overcome continuous casting breakout prediction method in the prior art and device in forecast accuracy and report Deficiency is realized to bonding there is provided the crystallizer bleedout prediction electric thermo system that a kind of logic-based judges present on alert promptness The promptly and accurately forecast of bleed-out, it is ensured that continuous casting direct motion and raising slab quality.

2. technical scheme

To reach above-mentioned purpose, the technical scheme that the present invention is provided is：

The crystallizer bleedout prediction electric thermo system that the logic-based of the present invention judges, the steel leakage prediction system hardware composition part bag Include fourplatemold and thermocouple, steel leakage prediction system computer, PLC, interchanger, thermocouple compensation cable, sound and light alarm Device, relay, distant station, wherein, steel leakage prediction system computer includes client and server computer, client computer For the monitoring display of bleed-out data, server computer is used for breakout prediction model calculation, breakout prediction model and client Information between breakout prediction graphical interfaces is exchanged, and the compression of bleed-out data is stored；

Wherein, the design of the embedded columns and rows spacing of thermocouple meets following condition：

In formula, t_xAnd t_yTo bond tearing port the time required to one thermocouple spacing of horizontal and vertical propagation；D_xAnd D_yPoint Wei not the embedded row and column spacing of copper plate of crystallizer thermocouple；V_xAnd V_yRespectively bond the horizontal and vertical spread speed of tearing port；β To bond the tear line and horizontal angle of breach, 20 °~50 ° are taken；

The steel leakage prediction system carries out crystallizer bleedout prediction electric thermo using following steps：

Step 1: from parameter configuration files read breakout prediction method in each logic judgment parameter of regularity；

Step 2: the collection of copper plate of crystallizer electric thermo-couple temperature time series data, storage and pretreatment；

Step 3: entering trip temperature respectively to all thermocouples on copper plate of crystallizer simultaneously rises inspection；

Step 4: the thermocouple for rising Rule of judgment to meeting temperature in step 3 carries out temperature rate-of-rise inspection；

Step 5：To 3 thermocouple TC (i, j-1), TC (i, j+1) and the TC around temperaturing lifting abnormality thermocouple TC (i, j) (i+1, j) progress temperature change delay checks, and judges whether that making bonding gently alarms according to result；

Step 6：Meet thermocouple TC (i, j) constant temperature and decline inspection or TC (m, n) surrounding's electric thermo-couple temperature change Change after delay inspection, then into step 7；

Step 7：Electric thermo-couple temperature, which is inverted, to be checked；

Step 8：According to alarm shielding condition, judge whether that make bonding steel leakage alarms again.

As further improvement of the present invention, each logic judgment parameter of regularity includes data prediction logic in step one Judge that parameter, electric thermo-couple temperature rise and check that logic judgment parameter, electric thermo-couple temperature climbing speed check logic judgment parameter, heat The delay of galvanic couple temperature change checks that logic judgment parameter, electric thermo-couple temperature decline and checks that logic judgment parameter, electric thermo-couple temperature are fallen Inspection logic judgment parameter, bonding steel leakage is put gently to alarm and weigh alarming logic and judge parameter.

As further improvement of the present invention, in step 2, all electric thermo-couple temperatures in copper plate of crystallizer are gathered first Time series data simultaneously stores numbering, the temperature of thermocouple of collection per second according to the predetermined row and column arrangement mode of thermocouple；

Then following data filtering and smooth pretreatment are carried out：

A) electric thermo-couple temperature is less than 50 DEG C or more than 200 DEG C, is not involved in algorithm calculating；

B) temperature fluctuation per second is more than 20 DEG C, and every temperature fluctuation in 2 seconds is more than 38 DEG C, is not involved in algorithm calculating；

C) temperature data for gathering thermocouple current time is made comparisons with the temperature data that the thermocouple previous second gathers, Temperature data by temperature change more than 20% replaces with the temperature data of previous second collection；

D) time series data of each electric thermo-couple temperature is smoothed using the method for moving average, above-mentioned movement is put down Equal method be use before and after current time one it is intersegmental every temperature data calculate average value substitution current time temperature value, if mobile interval For 2k, k is positive integer, then the moving average at p momentFor：

In formula, T (p-k) is the electric thermo-couple temperature value at p-k moment.

As further improvement of the present invention, in step 3, electric thermo-couple temperature, which rises, checks as follows：When thermocouple is normal During work, take rise inspection cycle period for a temperature within every 4 seconds, if the temperature of the 1st second is a, the temperature of the 2nd second is b, the 3rd Second temperature is c, and the 4th second temperature is d；Every moment just checks first 3 seconds on a timeline and whether current time meets temperature Degree rises Rule of judgment：d>c>b>a；If certain moment the i-th row j row thermocouple TC (i, j) is met, then by the thermocouple, this is followed τ is labeled as in the ring cycle at the time of 1st second₀(i, j), if can not meet, the temperature continued next second, which rises, to be checked；

Wherein：Said temperature rising Rule of judgment is met when some temperature rises proof cycle, then checks next temperature Rise whether proof cycle still meets said temperature rising Rule of judgment, still meet the τ before then maintaining₀(i, j), if It is unsatisfactory for, the temperature continued next second, which rises, to be checked；

Temperature rising Rule of judgment is continuously unsatisfactory for if the temperature within 4 rises proof cycle, with latter Temperature rises proof cycle and meets temperature rising Rule of judgment, the then τ before still maintaining again₀(i, j)；If 5 or 5 Individual temperatures above rises proof cycle and is continuously unsatisfactory for temperature rising Rule of judgment, the then τ before removing₀(i, j), Zhi Houzai When meeting temperature rising Rule of judgment, then a τ is re-established₀(i, j), follow-up algorithm is with new τ₀On the basis of (i, j).

As further improvement of the present invention, temperature rate-of-rise checks as follows in step 4：When there is τ₀(i, j) When, thermocouple TC (i, j) temperature rate-of-rise u=(d-a)/3 value is calculated, compares u and design temperature climbing speed threshold values u_c Size；If u is more than or equal to u_c, then it is assumed that the thermocouple TC (i, j) temperature rise abnormity, while by τ₀(i, j) saves as this Electric thermo-couple temperature begins to ramp up moment t₀(i, j), moment acquiescence is temperature change point at first, into step 5.

As further improvement of the present invention, in step 5, in t₀Temperature change time delay threshold values after (i, j) In the range of, to 3 thermocouple TC (i, j-1) of TC (i, j) surroundings, TC (i, j+1) and TC, (i+1, j) repeat the above steps three and step Numeration is marked in rapid four logic judgment inspection, the thermocouple TC (m, n) for being satisfied by condition, and stores TC (m, n) temperature Begin to ramp up moment t₀(m, n), when mark count is more than 2, sends bonding steel leakage and gently alarms, enter back into step 6.

As further improvement of the present invention, in step 6, thermocouple TC (i, j) constant temperature, which declines, checks as follows： In t₀In 30 seconds after (i, j), temperature drop inspection is carried out to thermocouple TC (i, j), it every 4 seconds is a temperature drop inspection to take The cycle is looked into, if the 1st second temperature is a', the 2nd second temperature is b', and the 3rd second temperature is c', and temperature is d' within the 4th second, such as meets d' ﹤ c' ﹤ B' ﹤ a', then judge that temperature drop occurs in thermocouple TC (i, j), if persistently meeting 3 temperature drop proof cycles, then it is assumed that There is constant temperature decline in thermocouple TC (i, j), is directly entered step 7；

TC (m, n) surrounding's electric thermo-couple temperature change delay checks as follows：In t₀To institute in 3~15 seconds after (m, n) Having around TC (m, n) three thermocouple TC (m, n-1), TC (m, n+1) and TC, (m-1, n) repeat step three and step 4 are patrolled Collect and judge to check, thermocouple TC (i, j) temperature change is postponed to check wherein excluding, the equally thermocouple TC to meeting condition Numeration is marked in (x, y), and when marking count to be more than or equal to 3, thermocouple TC (i, j) is labeled as into doubtful bonding Point, is directly entered step 7.

As further improvement of the present invention, in step 7, in t₀In 30s after (i, j), by where TC (i, j) Two row thermocouples enter trip temperature and fallen under three thermocouple TC (i, j-1) of row, TC (i, j) and TC (i, j+1) corresponding column Logic judgment inspection is put, is specially：

Situation (1)：First compare t₀Before (i, j) in 10s, whether the mean temperature of i-th row some thermocouple is higher than same The mean temperature of one of lower two rows, 2 thermocouples of row；

If it is, observation is in t₀After (i, j) in 30s, the time-temperature curve of some thermocouple of i-th row Intersect with whether the time-temperature curve of one of two rows, 2 thermocouples under the same column has on image, if intersecting Then think temperature inversion occur, be directly entered step 8；

If be less than, compare t₀The temperature for whether occurring i-th row some thermocouple after (i, j) in 30s is first higher than It is less than one of two rows, 2 thermocouples under same column again afterwards, if there is, then it is assumed that occur in that temperature is inverted, be directly entered step Rapid eight；

Situation (2)：When the situation that is unsatisfactory for (1), first compare t₀10s before (i, j), certain row i+1 row thermocouple it is flat Whether equal temperature is higher than the mean temperature of the row thermocouple of row i-th+2；

If it is, in t₀After (i, j) in 30s, the time-temperature curve of certain row i+1 row thermocouple is observed with being somebody's turn to do Whether the time-temperature curve of the row thermocouple of row i-th+2 has intersection on image, then thinks that temperature occur falls if intersecting Put, be directly entered step 8；

If be less than, compare t₀The temperature for certain row i+1 row thermocouple whether occur in 30s after (i, j) is first higher than , when the situation described in appearance, appearance is still believed that after the row thermocouple of row i-th+2 less than the row thermocouple of row i-th+2 again Temperature inversion, is directly entered step 8.

As further improvement of the present invention, following alarm shielding condition is provided with step 8, if be discontented with Alarm shielding condition under being enough just is made bonding steel leakage and alarmed again：

1. 120s interior crystallizers liquid level exceeds predetermined minimum and maximum range before alarming, and system is not alarmed；

2. before alarming in 120s pulling rate less than it is default do not alarm pulling rate when, system is not alarmed；

3. before alarming in 120s pulling rate rate of change exceed it is default do not alarm pulling rate rate of change when, system is not alarmed；

4. when cast length be less than it is default do not alarm cast length when, system is not alarmed；

5. bonding steel leakage is alarmed again after in 60s, system is not alarmed；

6. when failure thermocouple number exceedes the threshold values of setting, system is not alarmed.

As further improvement of the present invention, in step 2, k is set to 2；In step 4, temperature rate-of-rise threshold values u_cIt is set to 0.15 DEG C/s；In step 5, t₀Temperature change time delay threshold range after (i, j) is set to 3~15 seconds； In step 8, mould liquid level predetermined minimum, maximum are respectively 80mm, 120mm；Default pulling rate of not alarming is 0.5m/ min；Default pulling rate rate of change of not alarming is 0.006m/min；Default cast length of not alarming is 3.0m；Failure thermoelectricity even number The threshold values that mesh is set as thermocouple sum 1/3；

The steel leakage prediction system also includes：Data acquisition unit, bleed-out data compress automatically memory cell, self study and from Line analysis unit, alarm and execution unit；

The data acquisition unit is used to obtain electric thermo-couple temperature real time data and casting cycle product practice, by counting According to measurement, data transfer and the part of host computer three composition；

Wherein：DATA REASONING part includes sensor and A/D change-over circuits, and A/D change-over circuits are used to measure sensor To analog signal be converted to data signal；TCP data segment uses field bus technique, for sending data to distal end Host computer, wherein having from oracle database and from two kinds of acquisition data modes of PLC, is retrieved as by building from oracle database Vertical continuous casting second databases are connected with the DB links of steel leakage prediction system database, are accessed using synonym；Number is obtained from PLC According to directly to gather Siemens S7-400 PLC using the OPC of Siemens's host computer Configuration software WinCC communications, gather what is come up Data are directly stored on the industrial computer for installing WinCC；

The bleed-out data compress memory cell automatically is used for the owning during real time execution by steel leakage prediction system Data, are compressed according to certain file format by way of data flow, and each casting cycle terminates to automatically save one File, each casting cycle starts with regard to being recorded automatically；

The self study and off-line analysis unit, can be carried out offline by off-line analysis module to breakout prediction model algorithm Emulation, specially changes logic judgment parameter of regularity, bleed-out data is played back, pass through forecast accuracy, rate of false alarm, alarm The performance indications of frequency carry out study optimization to breakout prediction model on-line parameter；Correspondence steel leakage prediction system is in on-line operation When, each bonding steel leakage is alarmed again send after, site operation personnel is confirmed whether it is correct bleed-out result and is confirmed whether it is just Really alarm, then system record automatically the correct alarm times of breakout prediction algorithm, error-alert degree, bonding steel leakage quote rate, Forecast accuracy, rate of false alarm, the index of wrong report frequency, and quote rate, forecast accuracy and false alarm with the bonding steel leakage of setting Frequency performance index threshold values is compared, once less than setting threshold values, system sends Parameter Self-learning request；Wherein, leakage is bonded Steel quotes rate=correct alarm times/(failing to report number of times+correct alarm times), and forecast accuracy=correct alarm times/(is failed to report Number of times+correct alarm times+error-alert degree), rate of false alarm=error-alert degree/(correct alarm times+error-alert degree), by mistake Report frequency=error-alert degree/casting furnace number；

The alarm and execution unit, bleed-out alarm signal is sent by audible-visual annunciator, and light alarm is bright for amber light, reports again Alert is when red, if attaching most importance to alarm, warning message uploads to the execution unit of casting speed control, is drawn by sending reduction to PLC Speed or the instruction directly shut down；

The parameter configuration unit, for setting system operational parameters, including various logic judgment rule parameter, system Username and password, and system communication connecting interface relevant parameter, and these parameters are stored in parameter configuration files, Can change parameter in administrator right, and automatically update parameter configuration files, during steel leakage prediction system computing directly from Put file call parameters.

3. beneficial effect

The technical scheme provided using the present invention, compared with prior art, with following remarkable result：

(1) the crystallizer bleedout prediction electric thermo method and system that logic-based proposed by the present invention judges is as base with bleed-out theory Plinth, relies on actual bleed-out data and produce reality to be designed, including：1. the design combination of various logic rule, utilizes reality Various temperature change features when border is bonded, take into full account balance, that is, when a certain Rule of judgment is more strict, other Part needs suitably to relax, and finds equalization point between forecast accuracy and reduction rate of false alarm improving, and further contemplate alarm response Time and ageing；2. the determination of breakout prediction algorithm and system core parameter, first by bleed-out data to raising speed in temperature Rate threshold values, bonding V-type breach horizontal and vertical propagation time, V-type tear line angle, the judgement parameter of data filtering, model screen The statistical analyses such as conditional parameter are covered, is continued to optimize then in conjunction with steel leakage prediction system operation result, makes overall system performance Reach optimal.

(2) present invention is on the premise of ensureing that bonding steel leakage is all quoted, in order to reduce false alarm, carries out from many aspects Consider, such as：1. when logic judgment algorithm is designed, take data filtering and smoothing processing, temperature rise inspection, temperature and risen Speed is checked, temperature change delay twice is checked, temperature drop inspection and temperature are inverted and checked；2. to unsteady statecalculation, thermoelectricity Situations such as even number of defects is more adds alarm shielding condition.

(3) present invention is in order to reduce the change of casting process and appointed condition etc. to breakout prediction algorithm and the shadow of system Ring, devise the function of systematic parameter self study, changed with the production law for adapting to actual complex, so as to improve breakout prediction system The adaptivity and stability of system.

(4) the crystallizer bleedout prediction electric thermo method and system that logic-based proposed by the present invention judges, meets produce reality, reports Alert fast response time, can send alarm bonding in V-type tearing port propagation 30s, not fail to report, forecast accuracy is high, false alarm Number of times is substantially reduced, and with preferable adaptivity and stability.

Brief description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this A little accompanying drawings obtain other related accompanying drawings.

Fig. 1 is the flow chart of the crystallizer bleedout prediction electric thermo method of logic-based judgement in embodiment 1；

The thermocouple schematic diagram that Fig. 2 respectively walks for breakout prediction logical check on copper plate of crystallizer in embodiment 1；

Fig. 3 is the structural representation of crystallizer bleedout prediction electric thermo system in embodiment 1；

Fig. 4 is affixed side E row electric thermo-couple temperature change curves in embodiment 1；

Fig. 5 is affixed side F row electric thermo-couple temperature change curves in embodiment 1；

Fig. 6 is affixed side G row electric thermo-couple temperature change curves in embodiment 1；

Fig. 7 is affixed side H row electric thermo-couple temperature change curves in embodiment 1；

Fig. 8 is affixed side I row electric thermo-couple temperature change curves in embodiment 1.

Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Therefore, embodiments of the invention below to providing in the accompanying drawings Detailed description be not intended to limit the scope of claimed invention, but be merely representative of the present invention selected embodiment. Based on the embodiment in the present invention, it is all that those of ordinary skill in the art are obtained under the premise of creative work is not made Other embodiment, belongs to the scope of protection of the invention.

To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

Embodiment 1

As shown in figure 1, the crystallizer bleedout prediction electric thermo method that the logic-based of the present embodiment judges, comprises the following steps：

Step 1: from parameter configuration files read breakout prediction method in each logic judgment parameter of regularity, including data are pre- Processing logic judgment parameter, electric thermo-couple temperature, which rise, checks that logic judgment parameter, electric thermo-couple temperature climbing speed check that logic is sentenced Disconnected parameter, electric thermo-couple temperature change delay check that logic judgment parameter, electric thermo-couple temperature decline and check logic judgment parameter, thermoelectricity Even temperature, which is inverted, checks that logic judgment parameter, bonding steel leakage are gently alarmed and weighed alarming logic and judge parameter.

Step 2: the collection of copper plate of crystallizer electric thermo-couple temperature time series data, storage and pretreatment.

All electric thermo-couple temperature time series datas and arranged first in collection copper plate of crystallizer according to the predetermined row and column of thermocouple Row mode is stored in numbering, the present embodiment, the thermocouple line number buried in copper plate of crystallizer is designated as 1 successively from top to bottom, 2, 3rd ..., row number by it is left-to-right be designated as successively A, B, C ..., such as, 3B represents the 3rd row B row thermocouples.

The temperature of thermocouple of collection per second, then carries out following data filtering and smooth pretreatment, to reduce mistake The influence of data and data fluctuations to breakout prediction method, specific as follows by mistake：

A) electric thermo-couple temperature is less than 50 DEG C or more than 200 DEG C, is not involved in algorithm calculating.

B) temperature fluctuation per second is more than 20 DEG C, and every temperature fluctuation in 2 seconds is more than 38 DEG C, is not involved in algorithm calculating.

C) temperature data for gathering thermocouple current time is made comparisons with the temperature data that the thermocouple previous second gathers, Temperature data by temperature change more than 20% replaces with the temperature data of previous second collection.

D) time series data of each electric thermo-couple temperature is smoothed using the method for moving average, is ensureing not lose While removing former electric thermo-couple temperature variation characteristic, reduce influence of the thermo-electric couple temperature data fluctuation to model.

Here the method for moving average be use before and after current time one it is intersegmental every temperature data to calculate average value substitution current Moment temperature value, if mobile at intervals of 2k, k is positive integer, then the moving average at p momentFor：

In formula, T (p-k) is the electric thermo-couple temperature value at p-k moment.K is set to 2 in the present invention.

Step 3: entering trip temperature respectively to all thermocouples on copper plate of crystallizer simultaneously rises inspection.All single heat Galvanic couple temperature, which rises, checks as follows：

When thermocouple normal work, take rise inspection cycle period for a temperature within every 4 seconds, if the temperature of the 1st second is A, the temperature of the 2nd second is b, and the 3rd second temperature is c, and the 4th second temperature is d；Every moment just checks first 3 seconds on a timeline Temperature, which whether is met, with current time rises Rule of judgment：d>c>b>a；If certain moment the i-th row j row thermocouple TC (i, j) is full Foot, then be labeled as τ at the time of by the 1st second in the thermocouple this cycle period₀(i, j), if can not meet, continues next second Temperature rise check.

Said temperature rising Rule of judgment is met when some temperature rises proof cycle, then checks next temperature and rises inspection Look into whether the cycle still meets said temperature rising Rule of judgment, still meet the τ before then maintaining₀(i, j), if discontented Foot, the temperature continued next second, which rises, to be checked.

(1) temperature rising Rule of judgment is continuously unsatisfactory for if the temperature within 4 rises proof cycle, with latter Individual temperature rises proof cycle and meets temperature rising Rule of judgment, the then τ before still maintaining again₀(i, j)；(2) if 5 Individual or 5 temperatures above rise proof cycle and are continuously unsatisfactory for temperature rising Rule of judgment, the then τ before removing₀(i, j), When meeting temperature rising Rule of judgment again afterwards, then a τ is re-established₀(i, j), follow-up algorithm is with new τ₀(i, j) is base It is accurate.

Step 4: the thermocouple for rising Rule of judgment to meeting temperature in step 3 carries out temperature rate-of-rise inspection.Tool Body is as follows：

When there is τ₀When (i, j), thermocouple TC (i, j) temperature rate-of-rise u=(d-a)/3 value is calculated, compares u with setting Determine temperature rate-of-rise threshold values u_cSize.If u is more than or equal to u_c, then it is assumed that the thermocouple TC (i, j) temperature rise abnormity, Simultaneously by τ₀(i, j) saves as the electric thermo-couple temperature and begins to ramp up moment t₀(i, j), moment acquiescence is temperature change point at first, Into step 5.Wherein, temperature rate-of-rise threshold values u in the present embodiment_cIt is set to 0.15 DEG C/s.

Step 5：As shown in Fig. 2 to 3 thermocouple TC (i, j-1), TC around temperaturing lifting abnormality thermocouple TC (i, j) (i+1, j) progress temperature change delay checks, and judges whether that making bonding gently alarms according to result by (i, j+1) and TC.Specifically For：

In t₀(it is set in temperature change time delay threshold range after (i, j) in the present embodiment in 3~15 seconds), To 3 thermocouple TC (i, j-1) of TC (i, j) surroundings, TC (i, j+1) and TC (i+1, j) repeat step three and step 4 logics When judging to check, numeration is marked in the thermocouple TC (m, n) for being satisfied by condition, and storing TC (m, n) temperature and begin to ramp up Carve t₀(m, n), when mark count is more than 2, sends bonding steel leakage and gently alarms, into step 6.

(1) thermocouple TC (i, j) constant temperature, which declines, checks as follows：

In t₀In 30 seconds after (i, j), temperature drop inspection is carried out to thermocouple TC (i, j), it every 4 seconds is a temperature to take Degree declines proof cycle, if the 1st second temperature is a', and the 2nd second temperature is b', and the 3rd second temperature is c', and the 4th second temperature is d', such as full Sufficient d' ﹤ c' ﹤ b' ﹤ a', then judge that temperature drop occurs in thermocouple TC (i, j), if persistently meeting 3 temperature drops checks week Phase, then it is assumed that constant temperature decline occurs in thermocouple TC (i, j), is directly entered step 7.

(2) as shown in Fig. 2 TC (m, n) surrounding's electric thermo-couple temperature change delay checks following (wherein, exclude to thermoelectricity The temperature change delay of even TC (i, j) is checked)：

In t₀To three thermocouple TC (m, n-1), TC (m, n around all TC (m, n) in 3~15 seconds after (m, n) + 1) and TC (m-1, n) repeat step three and step 4 logic judgment inspection, equally the thermocouple TC (x, y) to meeting condition Numeration is marked, when marking count to be more than or equal to 3, thermocouple TC (i, j) doubtful bonding point is labeled as, directly Into step 7.

Step 7：Electric thermo-couple temperature, which is inverted, to be checked.

In t₀In 30s after (i, j), TC (i, j) is expert at three thermocouple TC (i, j-1), TC (i, j) and TC Two row thermocouples enter trip temperature inversion logic judgment inspection under (i, j+1) corresponding column, i.e., for example for TC (i, j), Then by two row thermocouple TC under the corresponding columns of TC (i, j), (i+1, j) (i+2 j) enters trip temperature and is inverted logic judgment with TC Check；Specially：

Situation (1)：First compare t₀Before (i, j) in 10s, the i-th row some thermocouple (i.e. thermocouple TC (i, j-1), TC Any one in (i, j) and TC (i, j+1)) mean temperature whether be higher than one of two rows, 2 thermocouples under same column Mean temperature.

If it is, just comparing t again₀Whether occurs temperature inversion therewith in 30s after (i, j), i.e., in t₀After (i, j) In 30s, one of two rows, 2 thermocouples under the time-temperature curve and the same column of some thermocouple of i-th row (" one of them " selection herein is in t₀Before (i, j) in 10s, mean temperature is less than described some thermocouple of i-th row That) time-temperature curve whether have intersection on image, if intersect then think temperature inversion occur, directly enter Enter step 8；

If be less than, compare t₀Whether there is some thermocouple of the i-th row (i.e. thermocouple TC in 30s after (i, j) Any one in (i, j-1), TC (i, j) and TC (i, j+1)) temperature first higher than rear again less than two rows, 2 thermoelectricity under same column It is one of even, i.e., for example for TC (i, j), its t₀Temperature after (i, j) in 30s is first higher than rear again less than two rows under same column 2 thermocouple TC (i+1, j) and TC (i+2, one of j), if there is, then it is assumed that occur in that temperature is inverted, be directly entered Step 8.

Situation (2)：When the situation that is unsatisfactory for (1), just compare the thermocouple of certain row i+1 row and the heat of the row of row i-th+2 Whether galvanic couple there is temperature inversion, i.e., first compare t₀Whether 10s before (i, j), the mean temperature of certain row i+1 row thermocouple is high In the mean temperature of the row thermocouple of row i-th+2.

If it is, just comparing t again₀Whether occurs temperature inversion therewith in 30s after (i, j), i.e., in t₀After (i, j) In 30s, the time-temperature curve of the time-temperature curve of certain row i+1 row thermocouple and the row thermocouple of row i-th+2 is being schemed Whether there is intersection as upper, then think temperature inversion occur if intersecting, be directly entered step 8；

As long as said temperature, which is inverted in logical check, 1 temperature inversion occurs, just it is directly entered step 8 and prepares to send viscous Junction leakage steel is alarmed again.Temperature inversion is that the important change of cohesive tearing port communication process electric thermo-couple temperature is special in theory Levy, whether occur so there are many breakout prediction algorithms to be inverted temperature, and whether the inverted difference of temperature reaches setting value As the necessary condition for judging bonding steel leakage, but influenceed by the condition of continuous casting actual complex, this temperature phenomena of inversion is simultaneously It is not regular appearance, the present invention has found for substantial amounts of actual bleed-out data analysis, is bonding in the 30s occurred, certain row Other row thermocouples are difficult temperature inversion occur with the first row thermocouple, and in actual continuous casting, it may appear that first The temperature of row thermocouple is lower than the phenomenon of other row thermocouples of the row before generation is bonded.In order to reduce these as far as possible Interference, and reduce dependence of the temperature inversion for breakout prediction algorithm, temperature is inverted by the breakout prediction method of the present embodiment As one of final condition, and condition is very loose, and this is also the place that this method is different from other breakout prediction methods.

In order to reduce wrong report, there is provided following alarm shielding condition, if being unsatisfactory for following alarm shielding condition Bonding steel leakage is just made to alarm again：

1. 120s interior crystallizers liquid level exceeds predetermined minimum (present embodiment is set to 80mm) and maximum before alarming (present embodiment is set to 120mm) scope, system is not alarmed；

2. before alarming in 120s pulling rate less than it is default do not alarm pulling rate (present embodiment is set to 0.5m/min) when, system Do not alarm；

3. pulling rate rate of change exceedes and default does not alarm that (present embodiment is set to pulling rate rate of change in 120s before alarming When 0.006m/min), system is not alarmed；

4. open and pour stage judgement：When cast length is less than default cast length of not alarming (present embodiment is set to 3.0m) When, system is not alarmed；

5. bonding steel leakage is alarmed again after in 60s, system is not alarmed.

6. when failure thermocouple number exceedes threshold values (present embodiment is set to the 1/3 of thermocouple sum) of setting, it is System judges without bleed-out, does not alarm.

When sending bonding gently alarm, it is necessary to which site operation personnel carries out benefit slag, drags for the operation such as slag in time, and observe bleed-out Thermocouple temperature variation curve in forecast system operation interface, when send bond alarm again when, take drop pulling rate arrange Apply and avoid bleed-out.

Corresponding with the above method, the present embodiment also provides the crystallizer bleedout prediction electric thermo system that a kind of logic-based judges, As shown in figure 3, specifically including：

Crystallizer bleedout prediction electric thermo system hardware part includes：Modular panel billet crystallizer, totally four pieces of copper coins, conticaster The two pieces wide face copper coin of outer arc affixed side, two pieces of narrow copper plates of inner arc active side, crystallizer copper plate thickness is 41mm, copper coin surface Comprising 1mm nickel plating layer thicks, copper coin material is CuCrZr alloys.High accuracy K-type armouring heat is buried in the system copper plate of crystallizer Galvanic couple, thermocouple is mounted the copper coin surface temperature that positioning is contacted to detect with molten steel, and measuring accuracy is up to 0.1 DEG C, measurement The form of thermocouple is using measurement point and compensating wire distributing installation, and thermocouple is using initial tension of spring crimping and clip fixation side Formula is connected, outside also to use rubber seal, prevents thermocouple from seeping water.Thermocouple insertion depth is 20.5mm on wide face copper coin, narrow Thermocouple insertion depth is 20mm on the copper coin of face.Thermocouple temperature survey and its accurate stable are steel leakage prediction systems The premise and key of work, especially high casting speed continuous casting process.

Meanwhile, the thermocouple arrangement of the steel leakage prediction system is using high density thermocouple arrangement, wide face copper coin cloth Put m rows n₁Row, narrow copper plate arrangement m rows n₂Row, leptoprosopy and wide face are embedded highly identical per a line thermocouple, and the first row thermoelectricity Occasionally it is arranged in away from below meniscus 50mm positions, to reduce liquid fluctuating and slag circle etc. to the first row thermocouple temperature measurement accuracy With the influence of temperature fluctuation.Wherein, m >=3, n₁Take the maximum integer less than (strand width/thermocouple buries column pitch+1), n₂ Take the maximum integer less than (slab thickness/thermocouple buries column pitch+1).The present invention on the embedded row of thermocouple and column and row with The design of capable spacing, in order to improve the accuracy rate of breakout prediction, and recognizes that the behavior of bonding is alarmed, is that this should make as soon as possible Cohesive V-type tearing port matches in the columns and rows spacing that vertically and horizontally spread speed is buried with thermocouple, that is, ensures to bond V Type breach is approximately equivalent in the time of one thermometric spacing of horizontal and vertical propagation.And from substantial amounts of bonding steel leakage green shell and thermoelectricity Knowable to even temperature data, bond breach and laterally propagate substantially faster than longitudinal propagation, so the embedded column pitch of thermocouple must be than row Spacing is big.The design that the present invention buries columns and rows spacing particularly with regard to thermocouple must is fulfilled for following condition：

In formula, t_xAnd t_yTo bond tearing port the time required to one thermocouple spacing of horizontal and vertical propagation；D_xAnd D_yPoint Wei not the embedded row and column spacing of copper plate of crystallizer thermocouple；V_xAnd V_yRespectively bond the horizontal and vertical spread speed of tearing port；β To bond the tear line and horizontal angle of breach, typically in 20 °~50 ° scopes.

In the present embodiment, on Thermocouple arrangement, the first row thermocouple is arranged in away from meniscus 70mm positions, while determine that β is averagely about 35 ° according to the measurement of bleed-out green shell and related bleed-out data statistics, then in order to ensure to glue Tie V-type tearing port equal the time required to one thermocouple spacing of horizontal and vertical propagation, thermocouple line space is designed as 126mm, column pitch is 180mm, and two wide face copper coin is respectively arranged 5 rows 12 and arranged, and two narrow copper plates are respectively arranged 5 rows 2 and arranged, altogether 140 thermocouples.

The crystallizer bleedout prediction electric thermo system hardware part that the present invention is provided also include fourplatemold and thermocouple, Steel leakage prediction system computer, PLC, interchanger, thermocouple compensation cable, audible-visual annunciator, relay, distant station etc..Wherein, Steel leakage prediction system computer includes client and server computer, and the monitoring that client computer is used for bleed-out data shows Show, any data are not preserved, and server computer is used for core breakout prediction model calculation, breakout prediction model and client Enter the exchange of row information and data between steel leakage prediction system graphical interfaces, and the compression of bleed-out data is stored.PLC is on the one hand Real-time data collection, passes to steel leakage prediction system, and another aspect logic judgment algorithm sends alarm signal to PLC, and PLC is sent Pulling rate execute instruction is dropped, bleed-out is prevented.

The crystallizer bleedout prediction electric thermo system architecture that the present invention is provided includes：

Data acquisition unit, for obtaining electric thermo-couple temperature real time data and casting cycle product practice, by data Measurement, data transfer and the part of host computer three composition.DATA REASONING part is mainly made up of sensor and A/D change-over circuits etc., Effect is that the analog signal for measuring sensor is converted to data signal, the temperature of such as thermocouple measurement.Data transfer part Divide and use field bus technique, effect is to send data to distal end host computer.Epigynous computer section is mainly software data interface Realization, it is contemplated that the existing data for coming from PLC of the system fetched data, also have the data for coming from continuous casting database, So having from oracle database and from two kinds of acquisition data modes of PLC.Obtained from oracle database, by setting up continuous casting two DBMS storehouse is connected with the DB links of steel leakage prediction system database, is accessed using synonym；Data are obtained from PLC, are utilized The OPC communications of the advanced host computer Configuration software WinCC of Siemens directly gather Siemens S7-400 PLC, gather the number come up On the industrial computer for installing WinCC according to being directly stored in, steel leakage prediction system can just be directly read.In data acquisition, In order to eliminate interference of the site environment to signal, the measures such as compensating cable and digital filtering are taken, reduce the influence of noise.

Bleed-out data compress memory cell automatically, for all numbers by steel leakage prediction system during real time execution According to being compressed according to certain file format by way of data flow, each casting cycle terminates to automatically save a text Part, each casting cycle starts with regard to being recorded automatically, and the data volume of system operation over a year is left in 50G after compression The right side, so 200G hard drive spaces can just preserve 4 annual datas without cleaning.

The breakout prediction model algorithm unit that logic-based judges, according to the electric thermo-couple temperature, pulling rate and crystallization received The casting cycle real time data such as device liquid level, and read each logic judgment parameter of regularity in systematic parameter configuration file, Ran Houyun Light alarm and the weight alarm decision of bonding steel leakage are carried out with model algorithm.

Steel leakage prediction system self study and off-line analysis unit, on the one hand can be used for the weight of history heat process data Put, history electric thermo-couple temperature, pulling rate and mould liquid level etc. can be checked, continuous casting process personnel can be to casting by history playback Journey crash analysis, finds out cause of accident, optimizes casting process parameter.Prior one side also may be used by off-line analysis module Off-line simulation is carried out to the breakout prediction model algorithm of core, specially changes logic judgment parameter of regularity, bleed-out data is entered Row is played back, and now steel leakage prediction system passes through forecast accuracy, rate of false alarm, alert frequency etc. using the parameter computing just set Performance indications compare just constantly can carry out study optimization to breakout prediction model on-line parameter.Meanwhile, correspondence breakout prediction system System in on-line operation, each bonding steel leakage is alarmed again send after, site operation personnel is according to whether bleed-out result confirms in time Whether it is correct alarm, then system records the correct alarm times of breakout prediction algorithm, error-alert degree, bonding steel leakage automatically The performance indications such as rate, forecast accuracy, rate of false alarm, wrong report frequency are quoted, and rate (this embodiment party is quoted with the bonding steel leakage of setting Taken in formula 100%), forecast accuracy (85% is taken in present embodiment) and false alarm frequency (0.15% is taken in present embodiment) Important performance indexes threshold values is compared, once less than setting threshold values, system can send Parameter Self-learning request.Glued in the present invention Junction leakage steel quotes rate=correct alarm times/(failing to report number of times+correct alarm times), and forecast accuracy=correct alarm times/ (failing to report number of times+correct alarm times+error-alert degree), rate of false alarm=error-alert degree/(correct alarm times+false alarm Number), report frequency=error-alert degree/casting furnace number by mistake.

Steel leakage prediction system is alarmed and execution unit, and bleed-out alarm signal is sent by audible-visual annunciator, and light alarm is Huang Lamp is bright, and alarm again is when red, if attaching most importance to alarm, warning message can upload to the execution unit of casting speed control, by PLC Send reduction pulling rate or the instruction directly shut down.Simultaneously all warning messages can all be transferred to system man-machine interface and show, and Preserve that steel leakage prediction system sends and these warning messages can be also saved in log file, in alarm logging file all goes through The details such as alarm moment, type of alarm, the alert locations of history, are easy to follow-up accident to search and statistical analysis.

Steel leakage prediction system parameter configuration unit, for setting system operational parameters, including various logic judgment rule ginseng Number, username and password of system etc., and system communication connecting interface relevant parameter, and these parameters are stored in parameter In configuration file, parameter can be changed in administrator right, and automatically update parameter configuration files, steel leakage prediction system computing When directly from configuration file call parameters.

The 3rd stove molten steel pours in slab caster in the present embodiment, company, and casting steel grade is SS400, casting section for 1550 × 230mm², work pulling rate is 1.2m/min, peaceful by data filtering to the Thermocouple temperature data collected first Sliding pretreatment, pretreated typical row electric thermo-couple temperature change curve is as shown in Fig. 4-Fig. 8, then, during according to these temperature Ordinal number is according to the logic judgment inspection for carrying out bonding steel leakage.

(1) electric thermo-couple temperature, which rises, checks.

Affixed side 1G thermocouples are 05:03:53 moment began to ramp up, and rose in this temperature and checked in circulation, a= 99.48 DEG C, b=99.68 DEG C, c=99.92 DEG C, d=100.24 DEG C, meet d>c>b>A, then record τ₀(1, G)=05:03: 53。

(2) electric thermo-couple temperature climbing speed is checked

Calculate affixed side 1G electric thermo-couple temperature climbing speed u=(100.24-99.48)/3=0.2533 DEG C/s>0.15℃/ S, then it is assumed that affixed side 1G electric thermo-couple temperature rise abnormities, while recording the electric thermo-couple temperature begins to ramp up moment t₀(1, G)= 05:03:53。

(3) to 05:03:1F, 1H and 2G thermocouple after 53 in 3~15s around affixed side 1G thermocouples enters trip temperature Rise abnormity is checked.

05:04:04 moment affixed side 1F thermocouple is begun to ramp up, and is risen in this temperature and is checked in circulation, a= 102.58 DEG C, b=102.76 DEG C, c=103.00 DEG C, d=103.26 DEG C, meet d>c>b>A, then record τ₀(1, F)=05: 04:04.Moreover, affixed side 1F electric thermo-couple temperature climbing speed u=(103.26-102.58)/3=0.2267 DEG C/s>0.15℃/ S, then it is assumed that affixed side 1F electric thermo-couple temperature rise abnormities, while recording the electric thermo-couple temperature begins to ramp up moment t₀(1, F)= 05:04:04。

05:03:56 moment affixed side 1H thermocouples are begun to ramp up, and are risen in this temperature and are checked in circulation, a= 94.58 DEG C, b=94.86 DEG C, c=95.66 DEG C, d=96.54 DEG C, meet d>c>b>A, then record τ₀(1, H)=05:03:56. Moreover, affixed side 1H electric thermo-couple temperature climbing speed u=(96.54-94.58)/3=0.6533 DEG C/s>0.15 DEG C/s, then it is assumed that Affixed side 1H electric thermo-couple temperature rise abnormities, while recording the electric thermo-couple temperature begins to ramp up moment t₀(1, H)=05:03:56.

05:04:05 moment affixed side 2G thermocouple is begun to ramp up, and is risen in this temperature and is checked in circulation, a= 92.80 DEG C, b=93.02 DEG C, c=93.28 DEG C, d=93.58 DEG C, meet d>c>b>A, then record τ₀(2, G)=05:04:05. Moreover, affixed side 2G electric thermo-couple temperature climbing speed u=(93.58-92.80)/3=0.26 DEG C/s>0.15 DEG C/s, then it is assumed that Gu Side 2G electric thermo-couple temperature rise abnormities are determined, while recording the electric thermo-couple temperature begins to ramp up moment t₀(2, G)=05:04:05.

Gently alarmed from the foregoing, it will be observed that temperature rise abnormity thermocouple quantity sends bonding steel leakage for 3.

(4) surrounding's thermoelectricity of the inspection of affixed side 1G electric thermo-couple temperatures continuous decrease or affixed side 1F, 1H and 2G thermocouple Even temperature change delay is checked.

1) affixed side 1G electric thermo-couple temperatures continuous decrease is checked：

From 05:03:53 moment start after 30 seconds in, if the 1st second temperature is a', the 2nd second temperature is b', the 3rd second temperature For c', temperature is d' within the 4th second, occurs in that a'=102.24 DEG C, b'=102.20 DEG C, c'=102.12 DEG C, d'=101.98 DEG C, D' ﹤ c' ﹤ b' ﹤ a' are met, and 05:04:12 moment continued 3 circulations, then 05:04:12 moment judged affixed side 1G heat There is continuous decrease in galvanic couple temperature, is directly entered " (5) electric thermo-couple temperature is inverted logical check ".

2) surrounding's electric thermo-couple temperature change delay of affixed side 1F, 1H and 2G thermocouples is checked, including：

Wherein, with reference to Fig. 2, although surrounding's thermocouple of affixed side 1F, 1H and 2G thermocouple has 9 in theory, but excludes Affixed side 1G thermocouples, and (i.e. affixed side 2F, 2H thermocouple is only carried out affixed side 2F, the 2H thermocouple of repeat count respectively Temperature change delay is checked), the thermocouple that actual progress temperature change delay is checked only has 5, and cross is used in fig. 2 Lines have carried out filling mark)：

1. to 05:04:1E and 2F thermocouples after 04 in 3~15s around affixed side 1F thermocouples enter trip temperature rising Abnormal examination.

05:04:11 moment affixed side 1E thermocouples are begun to ramp up, and are risen in this temperature and are checked in circulation, a= 92.52 DEG C, b=92.68 DEG C, c=92.84 DEG C, d=93.02 DEG C, meet d>c>b>A, then record τ₀(1, E)=05:04:11. Moreover, affixed side 1E electric thermo-couple temperature climbing speed u=(93.02-92.52)/3=0.1667 DEG C/s>0.15 DEG C/s, then it is assumed that Affixed side 1E electric thermo-couple temperature rise abnormities, while recording the electric thermo-couple temperature begins to ramp up moment t₀(1, E)=05:04:11.

05:04:18 moment affixed side 2F thermocouples are begun to ramp up, and are risen in this temperature and are checked in circulation, a= 91.66 DEG C, b=91.80 DEG C, c=91.96 DEG C, d=92.14 DEG C, meet d>c>b>A, then record τ₀(1, E)=05:04:18. Moreover, affixed side 2F electric thermo-couple temperature climbing speed u=(92.14-91.66)/3=0.16 DEG C/s>0.15 DEG C/s, then it is assumed that Gu Side 2F electric thermo-couple temperature rise abnormities are determined, while recording the electric thermo-couple temperature begins to ramp up moment t₀(2, F)=05:04:18.

2. to 05:03:1I and 2H thermocouples after 56 in 3~15s around affixed side 1H thermocouples enter trip temperature rising Abnormal examination.

05:04:06 moment affixed side 1I thermocouple is begun to ramp up, and is risen in this temperature and is checked in circulation, a= 99.62 DEG C, b=99.74 DEG C, c=99.94 DEG C, d=100.26 DEG C, meet d>c>b>A, then record τ₀(1, I)=05:04: 06.Moreover, affixed side 1I electric thermo-couple temperature climbing speed u=(100.26-99.62)/3=0.2133 DEG C/s>0.15 DEG C/s, then Affixed side 1I electric thermo-couple temperature rise abnormities are thought, while recording the electric thermo-couple temperature begins to ramp up moment t₀(1, I)=05: 04:06。

05:04:04 moment affixed side 2H thermocouple is begun to ramp up, and is risen in this temperature and is checked in circulation, a= 93.20 DEG C, b=93.32 DEG C, c=93.48 DEG C, d=93.68 DEG C, meet d>c>b>A, then record τ₀(2, H)=05:04:04. Moreover, affixed side 2H electric thermo-couple temperature climbing speed u=(93.68-93.20)/3=0.16 DEG C/s>0.15 DEG C/s, then it is assumed that Gu Side 2H electric thermo-couple temperature rise abnormities are determined, while recording the electric thermo-couple temperature begins to ramp up moment t₀(2, H)=05:04:04.

3. to 05:04:3G thermocouples after 05 in 3~15s around affixed side 2G thermocouples enter trip temperature rise abnormity Check.

05:04:05 moment affixed side 3G thermocouple is begun to ramp up, and is risen in this temperature and is checked in circulation, a= 94.14 DEG C, b=94.28 DEG C, c=94.48 DEG C, d=94.70 DEG C, meet d>c>b>A, moreover, affixed side 3G electric thermo-couple temperatures Climbing speed u=(94.70-94.14)/3=0.28 DEG C/s>0.15 DEG C/s, but the electric thermo-couple temperature begins to ramp up the moment not 05:04:After 05 in 3~15s, so affixed side 3G thermocouples are not counted in the abnormal thermocouple of sticking temperature.

It can thus be concluded that, there are 4 thermocouples to meet temperature change delay around affixed side 1F, 1H and 2G thermocouple and check bar Affixed side thermocouple 1G is then labeled as doubtful bonding point by part, quantity more than 3, into " (5) electric thermo-couple temperature is inverted logic Check ".

It should be noted that above-mentioned " 1) affixed side 1G electric thermo-couple temperatures continuous decrease is checked ", " 2) affixed side 1F, 1H and The surrounding electric thermo-couple temperature change delay of 2G thermocouples is checked " if meet wherein any one be then directly entered " (5) thermocouple Temperature is inverted logical check ", in the present embodiment in order to become apparent from, comprehensively introduce whole breakout prediction method, be described.

(5) electric thermo-couple temperature is inverted logical check

With reference to Fig. 7,05:03:10s before 53 moment, (92.78 DEG C) of affixed side 2H thermocouples mean temperature, which is less than, fixes Side 1H thermocouples mean temperature (94.37 DEG C).05:03:After 53 moment in 30s, 05:04:13 moment affixed side 2H thermoelectricity It is even temperature inversion first occur with 1H thermocouples, send bonding and alarm again, used time 20s, than the actual bleed-out moment (05:04:40) It is advanced by about 27s.

In order to further verify the value of forecasting of the present invention, the 1569 furnace electric thermo-couple temperature of one month of collection in worksite are utilized Deng casting cycle data, the crystallizer bleedout prediction electric thermo method and system that the logic-based that the present embodiment is proposed judges are surveyed Examination, and contrasted with live steel leakage prediction system.Test obtained result as shown in table 1.

The present invention of table 1 and the comparison of live steel leakage prediction system

It was found from the test result of table 1, it is pre- that the every evaluation index of the steel leakage prediction system of the present embodiment is better than live bleed-out Reporting system.Live steel leakage prediction system, failing to report once to bond causes bleed-out, and wrong report number of times reaches 20 times, the alarm used time 50s with Interior, alarm response speed is slower, adds the risk that follow-up drop pulling rate repairs bleed-out.The breakout prediction method of the present embodiment and it is System is reported by mistake 1 time without failing to report, and wrong report number of times is substantially reduced, and bonding steel leakage quotes rate and reaches 100%, and forecast accuracy reaches 88.89%, rate of false alarm is 11.11%, and false alarm frequency is only 0.06% time/stove, and the alarm used time of all bonding steel leakages All within 30s, alarm response speed is fast, and repairing bleed-out for follow-up drop pulling rate provides time enough.

Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area Art personnel are enlightened by it, without departing from the spirit of the invention, are designed and the technical scheme without creative Similar frame mode and embodiment, all should belong to protection scope of the present invention.

Claims

1. the crystallizer bleedout prediction electric thermo system that a kind of logic-based judges, it is characterised in that the steel leakage prediction system hardware is constituted Part includes fourplatemold and thermocouple, steel leakage prediction system computer, PLC, interchanger, thermocouple compensation cable, sound Light crossing-signal, relay, distant station, wherein, steel leakage prediction system computer includes client and server computer, client Computer be used for bleed-out data monitoring display, server computer be used for breakout prediction model calculation, breakout prediction model and Information between client breakout prediction graphical interfaces is exchanged, and the compression of bleed-out data is stored；

In formula, t_xAnd t_yTo bond tearing port the time required to one thermocouple spacing of horizontal and vertical propagation；D_xAnd D_yRespectively Copper plate of crystallizer thermocouple buries row and column spacing；V_xAnd V_yRespectively bond the horizontal and vertical spread speed of tearing port；β is viscous The tear line and horizontal angle of breach are tied, 20 °~50 ° are taken；

Step 5：To 3 thermocouple TC (i, j-1) around temperaturing lifting abnormality thermocouple TC (i, j), TC (i, j+1) and TC (i+1, J) delay of progress temperature change is checked, and judges whether that making bonding gently alarms according to result；

Step 6：The surrounding's electric thermo-couple temperature change for meeting thermocouple TC (i, j) constant temperature decline inspection or TC (m, n) is prolonged After checking late, then into step 7；

2. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 1 judges, it is characterised in that：In step one Each logic judgment parameter of regularity include data prediction logic judgment parameter, electric thermo-couple temperature rise check logic judgment parameter, Electric thermo-couple temperature climbing speed checks that logic judgment parameter, electric thermo-couple temperature change delay check logic judgment parameter, thermocouple Temperature drop checks that logic judgment parameter, electric thermo-couple temperature are inverted and checks that logic judgment parameter, bonding steel leakage are gently alarmed and reported again Alert logic judgment parameter.

3. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 2 judges, it is characterised in that：Step 2 In, all electric thermo-couple temperature time series datas and according to the predetermined row and column arrangement mode of thermocouple in copper plate of crystallizer are gathered first Storage numbering, the temperature of thermocouple of collection per second；

Then following data filtering and smooth pretreatment are carried out：

C) temperature data for gathering thermocouple current time is made comparisons with the temperature data that the thermocouple previous second gathers, by temperature Temperature data of the degree change more than 20% replaces with the temperature data of previous second collection；

D) time series data of each electric thermo-couple temperature is smoothed using the method for moving average, the above-mentioned method of moving average Be use before and after current time one it is intersegmental every temperature data calculate average value substitution current time temperature value, if it is mobile at intervals of 2k, k are positive integer, then the moving average at p momentFor：

<mrow> <mover> <mrow> <mi>T</mi> <mrow> <mo>(</mo> <mi>p</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mo>=</mo> <mfrac> <mrow> <mi>T</mi> <mrow> <mo>(</mo> <mi>p</mi> <mo>-</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>+</mo> <mi>T</mi> <mrow> <mo>(</mo> <mi>p</mi> <mo>-</mo> <mi>k</mi> <mo>+</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>+</mo> <mo>...</mo> <mo>+</mo> <mi>T</mi> <mrow> <mo>(</mo> <mi>p</mi> <mo>+</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>+</mo> <mi>T</mi> <mrow> <mo>(</mo> <mi>p</mi> <mo>+</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow> <mrow> <mn>2</mn> <mi>k</mi> </mrow> </mfrac> </mrow>

4. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 3 judges, it is characterised in that in step 3 Electric thermo-couple temperature, which rises, checks as follows：When thermocouple normal work, take rise inspection cycle period for a temperature within every 4 seconds, If the temperature of the 1st second is a, the temperature of the 2nd second is b, and the 3rd second temperature is c, and the 4th second temperature is d；Every one on a timeline Moment just checks first 3 seconds and whether current time meets temperature and rise Rule of judgment：d>c>b>a；If certain moment the i-th row j is arranged Thermocouple TC (i, j) is met, then τ is labeled as at the time of by the 1st second in the thermocouple this cycle period₀(i, j), if can not Meet, the temperature continued next second, which rises, to be checked；

Wherein：Said temperature rising Rule of judgment is met when some temperature rises proof cycle, then checks next temperature and rises Whether proof cycle, which still meets said temperature, rises Rule of judgment, still meets the τ before then maintaining₀(i, j), if discontented Foot, the temperature continued next second, which rises, to be checked；

Temperature rising Rule of judgment is continuously unsatisfactory for if the temperature within 4 rises proof cycle, with latter temperature Rise proof cycle and meet temperature rising Rule of judgment, the then τ before still maintaining again₀(i, j)；If 5 or 5 with Upper temperature rises proof cycle and is continuously unsatisfactory for temperature rising Rule of judgment, the then τ before removing₀(i, j), meets again afterwards When temperature rises Rule of judgment, then a τ is re-established₀(i, j), follow-up algorithm is with new τ₀On the basis of (i, j).

5. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 4 judges, it is characterised in that in step 4 Temperature rate-of-rise checks as follows：When there is τ₀When (i, j), thermocouple TC (i, j) temperature rate-of-rise u=(d-a)/3 is calculated Value, compare u and design temperature climbing speed threshold values u_cSize；If u is more than or equal to u_c, then it is assumed that thermocouple TC (i, j) Temperature rise abnormity, while by τ₀(i, j) saves as the electric thermo-couple temperature and begins to ramp up moment t₀(i, j), moment acquiescence is temperature Change point at first is spent, into step 5.

6. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 5 judges, it is characterised in that：Step 5 In, in t₀In temperature change time delay threshold range after (i, j), to 3 thermocouple TC (i, j-1) around TC (i, j), (i+1, the logic judgment inspection of j) repeat the above steps three and step 4, is satisfied by the thermocouple TC of condition by TC (i, j+1) and TC Numeration is marked in (m, n), and stores TC (m, n) temperature and begin to ramp up moment t₀(m, n), mark count is more than 2 When, send bonding steel leakage and gently alarm, enter back into step 6.

7. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 6 judges, it is characterised in that step 6 In, thermocouple TC (i, j) constant temperature, which declines, checks as follows：In t₀In 30 seconds after (i, j), thermocouple TC (i, j) is entered Trip temperature, which declines, to be checked, it every 4 seconds is a temperature drop proof cycle to take, if the 1st second temperature is a', the 2nd second temperature is b', the 3 seconds temperature are c', and temperature is d' within the 4th second, such as meets d' ﹤ c' ﹤ b' ﹤ a', then judge that temperature drop occurs in thermocouple TC (i, j), If persistently meeting 3 temperature drop proof cycles, then it is assumed that constant temperature decline occurs in thermocouple TC (i, j), is directly entered Step 7；

TC (m, n) surrounding's electric thermo-couple temperature change delay checks as follows：In t₀To all TC in 3~15 seconds after (m, n) Three thermocouple TC (m, n-1) around (m, n), TC (m, n+1) and TC (m-1, n) logic of repeat step three and step 4 sentence It is disconnected to check, thermocouple TC (i, j) temperature change is postponed to check wherein excluding, equally to meet condition thermocouple TC (x, Y) numeration is marked, when marking count to be more than or equal to 3, thermocouple TC (i, j) doubtful bonding point is labeled as, directly Tap into step 7.

8. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 7 judges, it is characterised in that step 7 In, in t₀In 30s after (i, j), TC (i, j) is expert at three thermocouple TC (i, j-1), TC (i, j) and TC (i, j+1) Two row thermocouples enter trip temperature inversion logic judgment inspection under corresponding column, are specially：

Situation (1)：First compare t₀Before (i, j) in 10s, whether the mean temperature of i-th row some thermocouple is higher than two under same column The mean temperature of one of 2 thermocouples of row；

If it is, observation is in t₀After (i, j) in 30s, the time-temperature curve of some thermocouple of i-th row with it is described Whether the time-temperature curve of one of two rows, 2 thermocouples has intersection on image under same column, then thinks if intersecting There is temperature to be inverted, be directly entered step 8；

If be less than, compare t₀Whether the temperature of i-th row some thermocouple is occurred after (i, j) in 30s first higher than rear and low In one of two rows, 2 thermocouples under same column, if there is, then it is assumed that occur in that temperature is inverted, be directly entered step 8；

Situation (2)：When the situation that is unsatisfactory for (1), first compare t₀10s, the mean temperature of certain row i+1 row thermocouple before (i, j) Whether the mean temperature of row i-th+2 row thermocouple is higher than；

If it is, in t₀After (i, j) in 30s, observe the time-temperature curve of certain row i+1 row thermocouple and the row i-th+ Whether the time-temperature curve of 2 row thermocouples has intersection on image, then thinks temperature inversion occur if intersecting, directly Into step 8；

If be less than, compare t₀Whether occur the temperature of certain row i+1 row thermocouple after (i, j) in 30s and first arrange the higher than this , when the situation described in appearance, still believe that less than the row thermocouple of row i-th+2 again after i+2 row thermocouples and occur in that temperature It is inverted, is directly entered step 8.

9. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 8 judges, it is characterised in that in step 8 There is provided following alarm shielding condition, alarms if being unsatisfactory for following alarm shielding condition and just making bonding steel leakage again：

10. the crystallizer bleedout prediction electric thermo system that logic-based according to claim 9 judges, it is characterised in that step 2 In, k is set to 2；In step 4, temperature rate-of-rise threshold values u_cIt is set to 0.15 DEG C/s；In step 5, t₀Temperature after (i, j) Degree change delay time threshold range is set to 3~15 seconds；In step 8, mould liquid level predetermined minimum, maximum difference For 80mm, 120mm；Default pulling rate of not alarming is 0.5m/min；Default pulling rate rate of change of not alarming is 0.006m/min；It is default Cast length of not alarming is 3.0m；The threshold values that failure thermocouple number is set as thermocouple sum 1/3；

The steel leakage prediction system also includes：Data acquisition unit, bleed-out data are compressed memory cell, self study and divided offline automatically Analyse unit, alarm and execution unit；

The data acquisition unit is used to obtain electric thermo-couple temperature real time data and casting cycle product practice, is surveyed by data Amount, data transfer and the part of host computer three composition；

Wherein：DATA REASONING part includes sensor and A/D change-over circuits, and A/D change-over circuits are used for measure sensor Analog signal is converted to data signal；TCP data segment uses field bus technique, upper for sending data to distal end Machine, wherein having from oracle database and from two kinds of acquisition data modes of PLC, is retrieved as by the company of foundation from oracle database Casting second databases are connected with the DBlinks of steel leakage prediction system database, are accessed using synonym；Obtaining data from PLC is Siemens S7-400 PLC is directly gathered using the OPC communications of Siemens's host computer Configuration software WinCC, the data come up are gathered Directly it is stored on the industrial computer for installing WinCC；

The bleed-out data compress memory cell automatically is used for all data by steel leakage prediction system during real time execution, It is compressed according to certain file format by way of data flow, each casting cycle terminates to automatically save a file, Each casting cycle starts with regard to being recorded automatically；

The self study and off-line analysis unit, can offline be imitated breakout prediction model algorithm by off-line analysis module Very, specially change logic judgment parameter of regularity, bleed-out data are played back, pass through forecast accuracy, rate of false alarm, alarm frequency The performance indications of rate carry out study optimization to breakout prediction model on-line parameter；Steel leakage prediction system is corresponded in on-line operation, Each bonding steel leakage is alarmed again send after, site operation personnel is confirmed whether it is correct bleed-out result and is confirmed whether it is correct report Alert, then system records the correct alarm times of breakout prediction algorithm, error-alert degree, bonding steel leakage and quotes rate, forecast automatically Accuracy rate, rate of false alarm, the index of wrong report frequency, and quote rate, forecast accuracy and false alarm frequency with the bonding steel leakage of setting Performance indications threshold values is compared, once less than setting threshold values, system sends Parameter Self-learning request；Wherein, bonding steel leakage report Extracting rate=correct alarm times/(failing to report number of times+correct alarm times), forecast accuracy=correct alarm times/(fails to report number of times + correct alarm times+error-alert degree), rate of false alarm=error-alert degree/(correct alarm times+error-alert degree), wrong report frequency Rate=error-alert degree/casting furnace number；

The alarm and execution unit, bleed-out alarm signal is sent by audible-visual annunciator, and light alarm is bright for amber light, and alarm again is When red, if attaching most importance to alarm, warning message uploads to the execution unit of casting speed control, by PLC send reduction pulling rate or The instruction directly shut down；

The parameter configuration unit, for setting system operational parameters, including various logic judgment rule parameter, the user of system Name and password, and system communication connecting interface relevant parameter, and these parameters are stored in parameter configuration files, in pipe Reason person's authority can change parameter, and automatically update parameter configuration files, directly from configuration text during steel leakage prediction system computing Part call parameters.