CN103852182B - A kind of automatic correcting method of high-temperature molten material temperature - Google Patents
A kind of automatic correcting method of high-temperature molten material temperature Download PDFInfo
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- CN103852182B CN103852182B CN201410074066.5A CN201410074066A CN103852182B CN 103852182 B CN103852182 B CN 103852182B CN 201410074066 A CN201410074066 A CN 201410074066A CN 103852182 B CN103852182 B CN 103852182B
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Abstract
A kind of automatic correcting method of high-temperature molten material temperature, according to the irrelevance between metallurgical furnace measurement melting material temperature in adjacent or some cycles, weight coefficient and factor of influence are introduced, current actual measurement melting material temperature is modified using the principle of normal distribution.Revised high-temperature fusion detection temperature of charge includes the algebraically weighting sum of current measurement value and historical measurements, and its weight coefficient and factor of influence have ageing.To Current Temperatures true value approximation ratio, factor of influence is then to be evaluated from historical measurements on current measurement time yardstick to weight coefficient for reflection in the temperature survey frequency out of some cycles the period.Do not have correlation in sequential due to entering stove material, stove is adjacent and interval melting material temperature is measured between operating independently of each other, and both meet independent normal distribution occasion.
Description
Technical field
The present invention relates to high-temperature molten material temperature test technical field in metallurgical furnace kiln, and in particular to a kind of high-temperature fusion
The automatic correcting method of temperature of charge.
Background technology
The temperature of high-temperature molten material is typically measured using disposable thermal galvanic couple in metallurgical furnace kiln, thermocouple output end
The secondary display instrument of hand-held is connected, temperature measuring data is recorded and upload after each measurement is stable.By measurement position, insertion
The influence of the various factors such as level, time of measuring length, feed way, measurement position in stove, measurement result is random big,
Can only be artificially identified according to production operation experience by site operation personnel, can not automatic screening reject, it is easy to cause to give birth to
Production process is judged by accident.And temperature of charge change is a continuous slow time-varying process in metallurgical furnace kiln.Material actual temperature is by preceding
There is certain deviation in the restriction of measurement temperature and measurement point several times, and current measurement temperature, actual measured value can not meet smelting
The requirement of golden stove feedback control.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of introducing weight coefficient the shortcomings that being directed in the prior art
And factor of influence, the method being modified using the principle of normal distribution to current actual measurement melting material temperature.
Adopted the following technical scheme that to solve the technical problem of the present invention：
A kind of automatic correcting method of high-temperature molten material temperature, according to metallurgical furnace measurement melting in adjacent or some cycles
Irrelevance between temperature of charge, weight coefficient and factor of influence are introduced, using the principle of normal distribution to current actual measurement melting
Temperature of charge is modified.
A kind of automatic correcting method of high-temperature molten material temperature, thermocouple is set in material metallurgical furnace kilneye, once
The output signal of thermocouple measurement is transformed into 4~20mA of standard outputs, conditioning after signal condition is amplified by signal amplifier
The output signal of amplification is connected to secondary intelligent display meter, and secondary intelligent display meter has input module, output module, liquid crystal
Display panel, storage and computing module, measurement button and transmission operation button are formed, and input module uses insulated enclosure formula standard
4~20mA terminals, output module are passed through using the clear transport protocol for supporting TCP/IP encrypted packets, the output signal of output module
WIFI module and wireless router storage are arrived in remote monitoring computer, and liquid crystal display panel is used for showing the target molten of setting
Temperature of charge, measurement melting material temperature and self-correcting melting material temperature and data transfer send status information, storage and
Computing module realizes that self-correcting temperature computation process and automatic dynamic refresh intermediate storage parameter.
The measurement signal line being connected with a thermocouple front end uses ceramic insulation protective case, glass fibre and shielding
Layer is thermally shielded protection and signal isolation.
The device that a kind of automatic correcting method of high-temperature molten material temperature uses, including a thermocouple are described once warm
Galvanic couple is arranged on material metallurgical furnace kilneye, the thermocouple connecting secondary intelligent display meter, a thermocouple with
Setting signal amplifier between secondary intelligent display meter, the signal amplifier outputting standard are 4~20mA, the secondary intelligence
Energy display instrument connects remote monitoring computer with wireless router by WIFI module, and the secondary intelligent display meter has defeated
Enter module, output module, liquid crystal display panel, storage and computing module, measurement button and send operation button to form, it is described defeated
Enter module and be provided with insulated enclosure formula standard 4~20mA terminals, the output module supports the transparent transmission association of TCP/IP encrypted packets
View.
A kind of automatic correcting method of high-temperature molten material temperature, the detailed calculating process of its algorithm model are as follows：1）Check
Measure memory cell data Ti, work as Ti≤ 0, Ti+1During ＞ 0, i=1,2 ..., 9, then T is madei+1..., T10=Ti；ti+1..., t10=
ti；Work as TiDuring ＞ 0, then T1、T2、…、T10；t1、t2…、t10；2）Calculate timing code Si-j, that is, current measurement time code is calculated with surveying
Measure memory cell data TiTime code labeling difference during ＞ 0；3）Calculate time scale ti-j；4）Calculate weighted factor ai, the time
Yardstick mean μ and time standard difference σ；5）Measurement temperature datum drift Δ TiWith factor of influence ki；6）Calculate self-correcting temperature knot
Fruit.
A kind of automatic correcting method of high-temperature molten material temperature, its calculation formula are as follows：
TO=TC+αikiΔTiI=1,2 ..., 5 (1)
ai=2-i (2)
ΔTi=-（Ti-Ts） (4)
Wherein shown in time marking code and time scale treaty rule such as formula (7), (8)：
Si-j:ddi-j:hhi-j:mmi-j:ssi-j (7)
TOIt is self-correcting temperature；
TCIt is current observed temperature；
ΔTiIt is the reference difference between ith observed temperature and current sets target temperature（History value）；
TiIt is ith observed temperature；
TsIt is current sets target temperature；
aiIt is i-th of temperature gap weight coefficient；
kiIt is that i-th of temperature gap influences coefficient；
μ is Current Temperatures time of measuring and historical temperature time of measuring interval hourage（10 groups of historical measurement datas and right
Answer time marking）；
σ is time marking standard deviation；
Si-jIt is to calculate timing code；
ti-jIt is to calculate time scale；
ddiIt is the ith measurement temperature time to correspond to the date；
ddjIt is the jth time measurement temperature time to correspond to the date；
hhiIt is the ith measurement temperature time to correspond to hourage；
hhjIt is the jth time measurement temperature time to correspond to hourage；
mmiIt is the ith measurement temperature time to correspond to the number of minutes；
mmjIt is the jth time measurement temperature time to correspond to the number of minutes；
ssiIt is the ith measurement temperature time to correspond to number of seconds；
ssjIt is the jth time measurement temperature time to correspond to number of seconds；
ddi-jIt is the difference on the date between ith measurement temperature and jth time measurement temperature；
hhi-jIt is the difference of the hourage between ith measurement temperature and jth time measurement temperature；
mmi-jIt is the difference of the number of minutes between ith measurement temperature and jth time measurement temperature；
ssi-jIt is the difference of the number of seconds between ith measurement temperature and jth time measurement temperature.
The high-temperature molten material temperature automatic correcting method of the present invention is measured according to metallurgical furnace in adjacent or some cycles
Irrelevance between melting material temperature, weight coefficient and factor of influence are introduced, using the principle of normal distribution to current actual measurement
Melting material temperature is modified, and is allowed to close to actual value.Revised high-temperature fusion detection temperature of charge includes
Current measurement value and the algebraically of historical measurements weighting sum, its weight coefficient and factor of influence have ageing.Weight coefficient
To Current Temperatures true value approximation ratio, factor of influence is then from history for reflection in the temperature survey frequency out of some cycles the period
Measured value is evaluated on current measurement time yardstick.Do not have correlation, stove phase in sequential due to entering stove material
Between adjacent and interval melting material temperature measurement operation independently of each other, both meet independent normal distribution occasion.
The present invention has the following advantages that due to using above technical scheme：1. the present invention is reached using basic mathematical method
Self-tuing on line computing function, heavy dependence of the measurement melting material temperature accurate reliability to knowhow is broken away from；2.
The memory data output and amount of calculation of the automatic correcting method are relatively small, hold on existing embedded microprocessor intelligent terminal
Easily realize, convenient extended in the secondary display instrument system of existing hand-held integrates, and development cost is low；3. present invention operation letter
It is single, input and setting operation button operating in a key, it is skillfully constructed, accurate and practical, cost-effective, being advantageous to large-scale promotion should
With.
Brief description of the drawings
Fig. 1 is timing code in self-correcting positive model of the present invention and puts into practice yardstick corresponding relation；
Fig. 2 is self-correcting flow chart of the present invention；
Fig. 3 is self-correction module functional diagram of the present invention；
Fig. 4 is embodiment self-correcting result schematic diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
A kind of automatic correcting method of high-temperature molten material temperature, according to metallurgical furnace measurement temperature in adjacent or some cycles
Between irrelevance, weight coefficient and factor of influence are introduced, using the principle of normal distribution to current actual measurement melting material temperature
It is modified.
The device that a kind of automatic correcting method of high-temperature molten material temperature uses, as shown in Fig. 2 including a thermocouple 1,
Thermocouple 1 passes through measurement signal line connecting secondary intelligent display meter 2, the measurement signal of the front end of thermocouple 1 connection
Line is thermally shielded protection and signal isolation using ceramic insulation protective case, glass fibre and screen layer.Thermocouple 1 with it is secondary
Signal amplifier is installed, signal amplifier outputting standard is 4~20mA, secondary intelligent display meter 2 between intelligent display meter 2
Remote monitoring computer 4 is connected by WIFI module and wireless router 3, secondary intelligent display meter 2 has input module, output
Module, liquid crystal display panel, storage and computing module, measurement button and transmission operation button are formed, and input module is provided with insulation
Sealed 4~20mA of standard terminals, output module support the clear transport protocol of TCP/IP encrypted packets.
Temperature carries out self-correcting when the present embodiment is to copper high-temperature fusion.
When implementing in production scene, before measurement, first in secondary intelligent display meter（2）Middle input needs the matte controlled
Target temperature.When matte mouth puts copper liquid, put copper protection mouth and open, a thermocouple 1 is inserted into metallurgical furnace by putting copper mouth
Below matte liquid level, after position to be measured determines, when sensor and the matte liquid of a thermocouple 1 fully contact for a period of time,
After about 10 seconds, when its signal output millivolt value no longer changes, thermocouple measuring temperature is that is to say close to ice copper liquid temperature, now
The measurement button on the secondary panel of intelligent display meter 2 is pressed, secondary intelligent display meter 2 records Current Temperatures measured value,
And timing code storage is corresponded into secondary intelligent display meter memory cell together with measured value.
Secondary intelligent display meter 2 has input/output module, liquid crystal display panel, storage and computing module, measurement and hair
Operation button is sent to form.Input module uses insulated enclosure formula standard 4~20mA terminals, for ease of production operation management, self-correcting
Positive temperature output is deposited using the clear transport protocol of support TCP/IP encrypted packets by WIFI module and technical grade wireless router 3
Store up in remote monitoring computer 4.Liquid crystal display panel is used for showing the target matte temperature of setting, measures matte temperature and oneself
Matte temperature is corrected, and data transfer sends status information.Storage and computing module realize self-correcting temperature computation process and
It is automatic to refresh intermediate storage parameter.This example selects Samsung OK6410 ARM11 industrial master boards, pre-installs WinCE5.0 operating systems
With SQLCE databases.Measurement and transmission operating function button provide one kind for operating personnel's execution temperature survey and are simply input
Condition.Specific calculating process is as follows：
1. numerical key input requirements target matte temperature TO is passed through according to produce reality requirement first；
2. pressing measurement button, current matte temperature is recorded, stores timing unit and history measurement
Temperature performs following computing：
J=0,1 ... n, n=10；When pressing cancel button, memory cell and sequential
Data record is kept constant in table.
3. calculate corresponding self-correcting temperature results.If i ＜ 10,
1）To Ti+1=Ti+2=...=T10,ti+1=ti+2=...=t10；
2）Calculate ti, by formula（7）With（8）Two formulas are calculated；
3）ai, wherein ai=ai+1=...=a10=2-i；
4）Calculate variance
5）According to 2）、3）、4）As a result, factor of influence is calculated6）Calculate self-correcting temperature TO=
TC+αikiΔTiI=1,2 ..., 5；
If during i >=10, it is calculated as follows：
1）According to formula（7）With（8）Calculate timing code dd corresponding to each measured temperature of sequential queuei-j:hhi-j:mmi-j:
ssi-jAnd time scale
2）Calculate time scale averageN=10, j=1,2 ..., n；
3) variance is calculatedWith measurement temperature reference difference Δ Ti=-(Ti-Ts)；
4) weight coefficient a is calculatedi=2-i, i=1 ..., 5；
5) factor of influence is calculated
6）Calculate self-correcting temperature TO=TC+αikiΔ Tii=1,2 ..., 5.
4. design temperature, sets target temperature and self-correcting temperature are output to secondary intelligent display meter display screen；
5. two times intelligent display meter current data is issued in LAN, and display data sends status information.
6. terminating, pending operation is waited.
With the actual thermocouple direct measurement temperature of synthetic furnace matte flash smelting and using the self-correcting provided in the present invention
Method calculates output temperature and contrasted, and wherein abscissa is electric thermo-couple temperature of measurement, and ordinate is self-correcting positive output temperature
Degree.As known to Fig. 4, the matte temperature measured by the present invention and thermocouple measuring temperature value are subjected to drawing expression, abscissa is
Thermocouple measuring temperature value, ordinate are the matte temperature value measured using the present invention, and two oblique lines are that relative error is 0.5%
The limits of error.As can be seen that the leading indicator of self-correcting of the present invention is as follows：
1）This method can effectively correct the deviation caused by measurement automatically, and abnormal measurement data is corrected；
2）Measurement error maximum is 6%, and temperature deviation is less than 0.5% after corresponding self-correcting；
3）Thermocouple measuring temperature mean value error is 2%, and self-correcting temperature mean value error is less than 0.2%, and measurement accuracy is significantly
Improve.
Claims (3)
- A kind of 1. automatic correcting method of high-temperature molten material temperature, it is characterised in that：According to metallurgical kiln in adjacent or some cycles Irrelevance between stove measurement melting material temperature, introduces weight coefficient and factor of influence, using the principle of normal distribution to working as Preceding actual measurement melting material temperature is modified, and specific method is：In material metallurgical furnace kilneye, thermocouple, a thermoelectricity are set The output signal occasionally measured is transformed into standard 4-20mA outputs after signal condition is amplified by signal amplifier, nurse one's health amplification Output signal is connected to secondary intelligent display meter, and secondary intelligent display meter has input module, output module, LCD Plate, storage and computing module, measurement button and transmission operation button are formed, and input module uses insulated enclosure formula standard 4-20mA Terminal, output module pass through WIFI moulds using the clear transport protocol for supporting TCP/IP encrypted packets, the output signal of output module Block and wireless router storage are arrived in remote monitoring computer, and liquid crystal display panel is used for showing the target molten material temperature of setting Degree, measurement melting material temperature and self-correcting melting material temperature and data transfer send status information, storage and calculating mould Block realizes self-correcting temperature computation process and automatic refreshing intermediate storage parameter.
- A kind of 2. automatic correcting method of high-temperature molten material temperature according to claim 1, it is characterised in that：It is described with one The measurement signal line of secondary thermocouple front end connection be thermally shielded using ceramic insulation protective case, glass fibre and screen layer protect and Signal isolation.
- 3. the device that a kind of automatic correcting method of high-temperature molten material temperature according to claim 1 or 2 uses, its feature It is：Including a thermocouple（1）, a thermocouple（1）It is arranged on material metallurgical furnace kilneye, a thermocouple （1）Connecting secondary intelligent display meter（2）, a thermocouple（1）With secondary intelligent display meter（2）Between setting signal Amplifier, the signal amplifier outputting standard are 4-20mA, the secondary intelligent display meter（2）By WIFI module and Wireless router（3）Connect remote monitoring computer（4）, the secondary intelligent display meter（2）By input module, output mould Block, liquid crystal display panel, storage and computing module, measurement button and transmission operation button are formed, and the input module is provided with exhausted The sealed standard 4-20mA terminals of edge, the output module support the clear transport protocol of TCP/IP encrypted packets.
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| CN112556878B (en) * | 2020-12-07 | 2022-11-15 | 安徽仕联电气有限公司 | High-temperature rotary furnace temperature monitoring and early warning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102252770A (en) * | 2011-04-29 | 2011-11-23 | 中冶赛迪工程技术股份有限公司 | Temperature-measurement compensating method and corrective type high-accuracy thermometer |
| CN103323145A (en) * | 2013-06-26 | 2013-09-25 | 中冶长天国际工程有限责任公司 | Method and device for detecting flue-gas temperature in rotary kiln |
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| JPH03186724A (en) * | 1989-12-15 | 1991-08-14 | Sumitomo Metal Ind Ltd | Molten metal temperature measuring instrument |
| CN102322970B (en) * | 2011-06-10 | 2014-06-04 | 武汉钢铁(集团)公司 | Automatic detection and analysis system for temperatures at multiple points of coke oven baking |
| CN202853760U (en) * | 2012-05-11 | 2013-04-03 | 亚实履带（天津）有限公司 | Heat treatment equipment temperature real-time monitoring and record alarm device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252770A (en) * | 2011-04-29 | 2011-11-23 | 中冶赛迪工程技术股份有限公司 | Temperature-measurement compensating method and corrective type high-accuracy thermometer |
| CN103323145A (en) * | 2013-06-26 | 2013-09-25 | 中冶长天国际工程有限责任公司 | Method and device for detecting flue-gas temperature in rotary kiln |
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