CN107450622A - Furnace temperature of heating furnace intelligence control system and control method - Google Patents
Furnace temperature of heating furnace intelligence control system and control method Download PDFInfo
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- CN107450622A CN107450622A CN201710713209.6A CN201710713209A CN107450622A CN 107450622 A CN107450622 A CN 107450622A CN 201710713209 A CN201710713209 A CN 201710713209A CN 107450622 A CN107450622 A CN 107450622A
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- temperature
- heating furnace
- furnace
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- infrared
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The present invention relates to heater for rolling steel field of intelligent control technology, more particularly to a kind of furnace temperature of heating furnace intelligence control system and control method.Including online infrared video temperature measurer, the natural gas flow adjustable valve and flow sensor that monitor computer and be installed on heating furnace gas pipeline；The online infrared video temperature measurer includes infrared camera and microprocessor, and infrared camera is used to gather the Infrared video image in burner hearth and is sent to microprocessor；The infrared video of microprocessor processes infrared camera shooting, the billet surface temperature that must be come out of the stove in interior field range；Online infrared video temperature measurer is connected with monitoring computer, and flow sensor is connected with monitoring computer input end, and monitoring fanout is connected with natural gas flow adjustable valve.The present invention judges to determine the control to input gas stream amount according to the steel billet real time temperature measured, steel billet temperature is in most appropriate level, both ensured the service life and rolling quality of milling train, and saved the energy again.
Description
Technical field
The present invention relates to heater for rolling steel field of intelligent control technology, more particularly to a kind of furnace temperature of heating furnace intelligent control system
System and control method.
Background technology
In billet rolling technique, the detection and control in billet surface temperature field are protected for steel in the whole operation of rolling
It is very important to hold good rolling characteristic.The too low burden that can increase milling train of temperature, milling train service life is caused to decline；Temperature
The waste of resource and the decline of rolling quality can be caused by spending height.For billet surface temperature feelings in monitoring rolling process in real time
Condition, typically temperature sensor can be set in heating furnace inside heater control system, utilize temperature sensors for detecting in stove
Temperature.But temperature sensor can only be laid in the partial points position of heating furnace inwall, cloth can only be detected and set up an office small range region around
Temperature, and apart from steel billet position farther out, the temperature of detection can not embody the actual temperature of billet surface.
As the development of infrared temperature-test technology, its application are more and more extensive.Infrared temperature-test technology can pass through collection
The infrared energy of object, analyze and obtain the surface temperature of object.And infrared video thermometry is even more in infrared measurement of temperature
On the basis of technology, fusion photoelectric imaging technology, computer technology, image processing techniques, by gathering the infrared of target object
Video, analysis obtain its temperature field situation, have accurate, real-time, fast feature.Accordingly it is contemplated that by infrared video thermometric
Technology is applied in furnace temperature of heating furnace detection, more accurately to detect billet surface temperature.
The content of the invention
To achieve the above object, the invention provides a kind of furnace temperature of heating furnace intelligence control system and control method, utilize
In heating furnace infrared camera accurately detect billet surface temperature, while realize heating-furnace using fuzzy control
The accurate control of temperature.
The technical scheme that the present invention samples is as follows：
A kind of furnace temperature of heating furnace intelligence control system, including online infrared video temperature measurer, monitoring computer and installation
In natural gas flow adjustable valve and flow sensor on heating furnace gas pipeline；The online infrared video temperature measurer includes
Infrared camera and microprocessor, infrared camera are arranged on heating furnace interior furnace wall, infrared are regarded for gather in burner hearth
Frequency image is simultaneously sent to microprocessor；Microprocessor is located at outside heating furnace, for handling infrared the regarding of infrared camera shooting
Frequently, the billet surface temperature that must be come out of the stove in interior field range；Online infrared video temperature measurer is connected with monitoring computer, will be clapped
The furnace inner video image taken the photograph and the billet surface temperature drawn are sent to monitoring computer；Flow sensor and monitoring computer
Input connects, for gathering the gas discharge in gas pipeline and being sent to monitoring computer；Monitor fanout
It is connected with natural gas flow adjustable valve, for being controlled according to billet surface temperature conditions in natural gas flow adjustable valve regulation pipe road
Gas discharge.
Further, described online infrared video temperature measurer obtains billet surface temperature using double light path color comparison temperature measurement method
Degree.The technical measures that the present invention is combined using infrared colorimetric and radiant thermometric technology, overcome oven cavity atmosphere and geometrical factor
Influence to thermometric, temperature measurement accuracy are high.
To avoid plant site cable from excessively causing security incident, described online infrared video temperature measurer is counted with monitoring
Calculation machine wireless connection.
A kind of furnace temperature of heating furnace intelligent control method, comprises the following steps：
The online infrared video temperature measurer of step 1. utilizes steel billet week in the infrared camera captured in real-time stove in heating furnace
The Infrared video image enclosed, the steel billet real time temperature in stove in field range is obtained through microprocessor processes, by video image and
Steel billet real time temperature is transferred to monitoring computer；
Step 2. monitoring computer compared with design temperature, if being more than or equal to design temperature, holds steel billet real time temperature
Row step 3.1；If being less than design temperature, step 3.2 is performed；
Step 3.1. monitoring computers send control signal to natural gas flow adjustable valve, are turned off, and stop gas transmission and adjust
Section, continues executing with step 1；
Step 3.2. monitoring computers calculate the difference of steel billet real time temperature and design temperature and using the difference as deviation
Value DV1, while the difference of steel billet real time temperature and design temperature in the unit of account time, i.e. difference variation rate is as deviation
DV2；According to deviation DV1And DV2, pid control parameter is searched based on fuzzy control rule, and tune is produced according to pid control parameter
Save control parameter OP1, perform step 4；
Step 4. monitors computer according to adjustment control parameter OP1And the gas discharge signal production that flow sensor is sent
Raw control output valve, exports and gives natural gas flow adjustable valve；
Step 5. natural gas flow adjustable valve continues executing with step 1 by control output valve regulation gas discharge.
Further, microprocessor calculates steel billet real time temperature using double light path color comparison temperature measurement method in step 1.
Fuzzy control rule includes in step 3.2：
Deviation DV1Fuzzy control subset be set as E={ NB, NM, NS, ZE, PS, PM, PB }=it is negative big, in bearing, bear
It is small, zero, just small, center is honest }={ -18, -12, -6,0,6,12,18 }；
Deviation DV2Fuzzy control subset be set as EC=NM, NS, ZE, PS,
PM }=it is negative small in negative, and zero, just small, center }={ -1.5, -1,0,1,1.5}.Fuzzy control rule further wraps
Include：According to deviation DV1And DV2Subset, fuzzy rule result is obtained based on following form：
According to fuzzy rule result, pid parameter basic value is obtained based on following table：
Wherein, the value of pid parameter basic value is：
| P | P1=40 | P2=50 | P3=55 | P4=60 | P5=55 | P6=45 | P7=40 |
| I | I1=50 | I2=55 | I3=60 | I4=90 | I5=65 | I6=50 | I7=45 |
| D | D1=30 | D2=40 | D3=40 | D4=40 | D5=45 | D6=40 | D7=35 |
According to pid parameter basic value, pid control parameter is calculated：
PID (k)=Kp [e (k)-e (k-1)]+Kie (k)+Kd [e (k) -2e (k-1)+(k-2)], wherein k are that kth time is adopted
Sample cycle, Kp are proportional components, and e (k) is the deviation in kth time sampling period, and Ki=KpT/Ti, Kd=KpTd/T, T is sampling
Cycle, Ti are the time of integration, and Td is derivative time.
Beneficial effects of the present invention：
1st, the present invention can complete inner operating monitoring and steel billet table simultaneously using infrared camera shooting furnace inner video image
Face Temperature Distribution detects in real time, and temperature measurement range is wide, more can specific aim measurement billet surface temperature.
2nd, the present invention using double light path color comparison temperature measurement method calculate billet surface temperature, can reduce oven cavity atmosphere and geometry because
Influence of the element to thermometric, makes temperature measurement accuracy higher.
3rd, the present invention judges to determine the control to input gas stream amount according to the steel billet real time temperature measured, with realization pair
The amendment of steel billet temperature, steel billet temperature is in most appropriate level, both ensured the service life and rolling quality of milling train, save again
The about energy.
Brief description of the drawings
Fig. 1 is the composition frame chart of present system；
Fig. 2 is the flow chart of the inventive method；
In figure, 1, online infrared video temperature measurer, 11, infrared camera, 12, microprocessor, 2, monitoring computer, 3,
Natural gas flow adjustable valve, 4, flow sensor.
Embodiment
Technical scheme is described in detail with reference to the accompanying drawings and examples.
A kind of furnace temperature of heating furnace intelligence control system, as shown in figure 1, including online infrared video temperature measurer 1, monitoring meter
Calculation machine 2 and the natural gas flow adjustable valve 3 and flow sensor 4 being installed on heating furnace gas pipeline.It is described online infrared
Video temperature measurer 1 includes infrared camera 11 and microprocessor 12, and infrared camera 11 is arranged on heating furnace interior furnace wall, is used
In the Infrared video image in collection burner hearth and it is sent to microprocessor；Microprocessor 12 is located at outside heating furnace, using double light
The infrared video of road color comparison temperature measurement method processing infrared camera shooting, the billet surface temperature that must be come out of the stove in interior field range；
Online infrared video temperature measurer 1 and the monitoring wireless connection of computer 2, by the furnace inner video image of shooting and the steel billet drawn
Surface temperature is sent to monitoring computer；Flow sensor 4 is connected with the monitoring input of computer 2, for gathering gas pipeline
Interior gas discharge is simultaneously sent to monitoring computer；The monitoring output end of computer 2 is connected with natural gas flow adjustable valve 3, is used
Gas discharge according to billet surface temperature conditions control natural gas flow adjustable valve regulation pipe road.
The method that furnace temperature of heating furnace intelligent control is carried out using said system, as shown in Fig. 2 comprising the following steps：
S1. online infrared video temperature measurer is utilized in the infrared camera captured in real-time stove in heating furnace around steel billet
Infrared video image, the steel billet real time temperature in stove in field range is obtained through microprocessor processes, by video image and steel billet
Real time temperature is transferred to monitoring computer.
S2. monitor computer preserve video image for monitoring inner operating situation, and by the steel billet real time temperature T of feedback with
Design temperature Ts (optimal billet rolling temperature) compares, if being more than or equal to design temperature, performs S3；If less than setting temperature
Degree, then perform S4.
S3. monitoring computer sends control signal to natural gas flow adjustable valve, is turned off, and stops gas transmission regulation, after
It is continuous to perform S1.
S4. monitor computer and calculate the difference of steel billet real time temperature and design temperature and using the difference as deviation DV1；
In one embodiment, the deviation DV of steel billet real time temperature and design temperature1A fuzzy control subset is set to, is obscured
Control subset E={ NB, NM, NS, ZE, PS, PM, PB }=it is negative big, it is negative small in bearing, zero, it is just small, hit exactly, honest=- 18 ,-
12, -6,0,6,12,18 }.In use, according to the deviation DV being actually calculated1With set -18, -12, -6,0,6,12,
18 } size compares, by deviation DV1It is included in set { negative big, in bearing, to bear small, zero, just small, center is honest }, and makes
Represented with set { NB, NM, NS, ZE, PS, PM, PB }.
S5. the difference of steel billet real time temperature and design temperature, i.e. difference variation rate in the computer unit of account time are monitored
As deviation；In one embodiment, deviation DV2It is set to a fuzzy control subset, fuzzy control subset EC
={ NM, NS, ZE, PS, PM }=it is negative small in negative, zero, just small, center }={ -1.5, -1,0,1,1.5}.In use, according to reality
The deviation DV that border is calculated2With set { -1.5, -1,0,1,1.5 } size compares, by deviation DV2It is included in set
It is negative small in negative, and zero, just small, center } in, and represented using set { NM, NS, ZE, PS, PM }.
S5. according to deviation DV1And DV2, pid control parameter is searched based on fuzzy control rule, in one embodiment,
Fuzzy control rule is as follows：
According to deviation DV1And DV2Subset, based on table 1 obtain fuzzy rule result：
Table 1
Fuzzy rule result is several including NB, NM, NS, ZE, PS, PM, PB, according to fuzzy rule result, is obtained based on table 2
Pid parameter basic value：
Table 2
Each fuzzy rule result has corresponded to parameter P, I, D one group of value, i.e. parameter basic value, wherein, P1-P7, I1-
I7, D1-D7 are predetermined parameter basic values, and in one embodiment, the value of pid parameter basic value is：
| P | P1=40 | P2=50 | P3=55 | P4=60 | P5=55 | P6=45 | P7=40 |
| I | I1=50 | I2=55 | I3=60 | I4=90 | I5=65 | I6=50 | I7=45 |
| D | D1=30 | D2=40 | D3=40 | D4=40 | D5=45 | D6=40 | D7=35 |
According to pid parameter basic value, pid control parameter is calculated：
PID (k)=Kp [e (k)-e (k-1)]+Kie (k)+Kd [e (k) -2e (k-1)+(k-2)], wherein k are that kth time is adopted
Sample cycle, Kp are proportional components, and e (k) is the deviation in kth time sampling period, and Ki=KpT/Ti, Kd=KpTd/T, T is sampling
Cycle, Ti are the time of integration, and Td is derivative time.
According to the adjusted control parameter OP of pid control parameter1。
S6. computer is monitored according to adjustment control parameter OP1And the gas discharge signal that flow sensor is sent produces
Output valve is controlled, exports and gives natural gas flow adjustable valve.
S7. natural gas flow adjustable valve is by control output valve regulation gas discharge, and continues executing with S1.
The trend that the present invention obtains the numerical value of furnace temperature deviation by furnace temperature variable quantity and furnace temperature rate of change and furnace temperature changes,
Using fuzzy control rule, take different pid control parameters, when accomplishing large deviation can quick response, rapid regulation, reduce
Transit time.Trend is adjusted during little deviation to slow down, and improves Control for Kiln Temperature precision.
Claims (7)
1. a kind of furnace temperature of heating furnace intelligence control system, it is characterised in that calculated including online infrared video temperature measurer, monitoring
Machine and the natural gas flow adjustable valve and flow sensor being installed on heating furnace gas pipeline；The online infrared video is surveyed
Wen Yi includes infrared camera and microprocessor, and infrared camera is arranged on heating furnace interior furnace wall, for gathering in burner hearth
Infrared video image and be sent to microprocessor；Microprocessor is located at outside heating furnace, for handling infrared camera shooting
Infrared video, the billet surface temperature that must be come out of the stove in interior field range；Online infrared video temperature measurer and monitoring computer
Connection, monitoring computer is sent to by the furnace inner video image of shooting and the billet surface temperature drawn；Flow sensor with
The connection of computer input end is monitored, for gathering the gas discharge in gas pipeline and being sent to monitoring computer；Monitoring meter
Calculation machine output end is connected with natural gas flow adjustable valve, for controlling natural gas flow adjustable valve according to billet surface temperature conditions
Adjust the gas discharge in pipeline.
2. furnace temperature of heating furnace intelligence control system according to claim 1, it is characterised in that described online infrared to regard
Frequency temperature measurer obtains billet surface temperature using double light path color comparison temperature measurement method.
3. furnace temperature of heating furnace intelligence control system according to claim 1, it is characterised in that described online infrared to regard
Frequency temperature measurer is connected with monitoring computer radio.
4. a kind of furnace temperature of heating furnace intelligent control method, it is characterised in that comprise the following steps：
The online infrared video temperature measurer of step 1. using steel billet in the infrared camera captured in real-time stove in heating furnace around
Infrared video image, the steel billet real time temperature in stove in field range is obtained through microprocessor processes, by video image and steel billet
Real time temperature is transferred to monitoring computer；
Steel billet real time temperature compared with design temperature, if being more than or equal to design temperature, is performed step by step 2. monitoring computer
Rapid 3.1；If being less than design temperature, step 3.2 is performed；
Step 3.1. monitoring computers send control signal to natural gas flow adjustable valve, are turned off, and stop gas transmission regulation, after
It is continuous to perform step 1；
Step 3.2. monitoring computers calculate the difference of steel billet real time temperature and design temperature and using the difference as deviation DV1,
The difference of steel billet real time temperature and design temperature in the unit of account time simultaneously, i.e., difference variation rate is as deviation DV2；According to
Deviation DV1And DV2, pid control parameter is searched based on fuzzy control rule, and adjustment control ginseng is produced according to pid control parameter
Number OP1, perform step 4；
Step 4. monitors computer according to adjustment control parameter OP1And the gas discharge signal that flow sensor is sent produces control
Output valve processed, export and give natural gas flow adjustable valve；
Step 5. natural gas flow adjustable valve continues executing with step 1 by control output valve regulation gas discharge.
5. furnace temperature of heating furnace intelligent control method according to claim 1, it is characterised in that microprocessor is adopted in step 1
Steel billet real time temperature is calculated with double light path color comparison temperature measurement method.
6. furnace temperature of heating furnace intelligent control method according to claim 4, it is characterised in that fuzzy control in step 3.2
Rule includes：
Deviation DV1Fuzzy control subset be set as E={ NB, NM, NS, ZE, PS, PM, PB }=it is negative big, in bearing, bear it is small,
Zero, just small, center is honest }={ -18, -12, -6,0,6,12,18 }；
Deviation DV2Fuzzy control subset be set as EC={ NM, NS, ZE, PS, PM }=in negative, and bear it is small, zero, it is just small, just
In={ -1.5, -1,0,1,1.5}.
7. furnace temperature of heating furnace intelligent control method according to claim 6, it is characterised in that fuzzy control rule is further
Including：According to deviation DV1And DV2Subset, fuzzy rule result is obtained based on following form：
According to fuzzy rule result, pid parameter basic value is obtained based on following table：
Wherein, the value of pid parameter basic value is：
According to pid parameter basic value, pid control parameter is calculated：
PID (k)=Kp [e (k)-e (k-1)]+Kie (k)+Kd [e (k) -2e (k-1)+(k-2)], wherein k are kth time sampling weeks
Phase, Kp are proportional components, and e (k) is the deviation in kth time sampling period, and Ki=KpT/Ti, Kd=KpTd/T, T is sampling week
Phase, Ti are the time of integration, and Td is derivative time.
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Cited By (4)
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| CN109598643A (en) * | 2018-12-12 | 2019-04-09 | 中国地质大学（武汉） | A kind of annealing furnace subregion gas flow distribution method, equipment and storage equipment |
| CN112378268A (en) * | 2020-11-13 | 2021-02-19 | 水滴智能装备技术(苏州)有限公司 | Heating furnace online furnace temperature control system and control method |
| CN113203297A (en) * | 2021-05-08 | 2021-08-03 | 安徽大学 | Intelligent combustion optimization control system based on surface temperature of workpiece in furnace |
| CN113238480A (en) * | 2021-05-17 | 2021-08-10 | 合肥工业大学 | Parameterized regulating and controlling system and method for metal cutting machining cooling gas jet |
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