CN104457606A - Blast furnace raceway imaging system and imaging method - Google Patents
Blast furnace raceway imaging system and imaging method Download PDFInfo
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- CN104457606A CN104457606A CN201310424808.8A CN201310424808A CN104457606A CN 104457606 A CN104457606 A CN 104457606A CN 201310424808 A CN201310424808 A CN 201310424808A CN 104457606 A CN104457606 A CN 104457606A
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Abstract
The invention discloses a blast furnace raceway imaging system and imaging method. The system comprises a microwave measuring instrument for depth measurement of a blast furnace raceway and a three-dimensional imaging computer of a zone dead stock. High-frequency microwaves are emitted to the detected blast furnace raceway, reflection echo waves are received, after the echo waves are converted into zero intermediate frequency signals through frequency-mixing filtering processing, the zero intermediate frequency signals are adjusted then, after signal processing, distance data measured by the microwave measuring instrument is converted into coordinate data through the three-dimensional imaging computer, and a three-dimensional image of the zone dead stock is fitted according to the coordinate data. By using the imaging system and the imaging method, the depth of the blast furnace raceway can be measured effectively, such that 3D imaging of the dead stock at the bottom of a furnace is realized.
Description
Technical field
The present invention relates to Blast Furnace Raceway depth survey technology, more particularly, relate to a kind of Blast Furnace Raceway imaging system and formation method.
Background technology
In steel smelting procedure, the data cases that Real-Time Monitoring understands Blast Furnace Raceway is very important in iron and steel is produced.Blast Furnace Raceway is the source of the heat and energy in whole blast furnace production process, is the indispensable important reaction zone of blast furnace stable operation, has vital effect to the energy-conservation of blast furnace and quiet run.The formation of raceway zone and response situation, directly affect the distribution of bottom house coal gas, furnace charge equilibrium decline and whole blast furnace in heat and mass transfer process.Can say, the even running of blast furnace directly depends on that raceway zone and dropping zone maintain stable state.So the degree of depth understanding Blast Furnace Raceway is in real time very important to the optimized blast furnace process condition of creation.
The method of the measurement raceway zone degree of depth known at present mainly contains following several:
(1) direct probe method.Existing conventional measuring method utilizes artificial plunger to learn the Blast Furnace Raceway degree of depth.Also various detecting instrument is utilized directly to measure raceway zone, as detector, probe, high-speed camera, endoscope etc.
(2) combustion chamber sampling method.By accurately measuring coke voidage, thus calculate the degree of depth of Blast Furnace Raceway further.Some difference of the situation residing for coke of raceway zone and dead stock column in blast fumance, the time that the coke of dead stock column stops before air port is longer, and the time that the coke of raceway zone stops wants shorter.Because raceway zone there is no the coke of stop during blast fumance, the coke that tuyere p robing takes out is the part that damping down falls from raceway zone top.Consider that the voidage of coke in air port sample can diminish suddenly in a certain position this feature, can determine the length of In Raceway Before Tuyere of Blast Furnace.
(3) founding mathematical models, carries out numerical simulation.In Tuyere Raceway, air-flow and coke are at the volley, mainly carry out the transmission of momentum, quality and heat, and therefore, this method mainly sets up the various equation of motion and balance equation, prepares a computer program, and carries out numerical simulation or makes professional software.In Japan, the people such as village determines the shape of raceway zone in model experiment, experimentally result, think raceway zone be in take the degree of depth as major axis with blasting jet district mutually in an ellipse connecing.And raceway zone width b is proposed
rwith raceway zone degree of depth L
rbetween pass be:
In formula: k is constant, d
bfor tuyere diameter, 30 ° refer to that coke flows into the angle between raceway zone and air port center line.
But because the physics of Blast Furnace Raceway, chemical change are very complicated, above method all can be shunk by hot blast xsect when measuring and the interference of breeze blowing etc., and precision is not high.Versatility is not strong.Therefore, the situation of raceway zone never obtains overall getting information about.And what more than measure is all the situation of single raceway zone, does not carry out comprehensively, drawing the 3-D view of dead stock column to raceway zone situations all bottom blast furnace, thus cannot to there being comprehensively understanding directly perceived bottom blast furnace.
Summary of the invention
For the above-mentioned shortcoming existed in prior art, the object of this invention is to provide a kind of Blast Furnace Raceway imaging system and formation method, can measure the degree of depth of Blast Furnace Raceway, realize furnace bottom dead stock column 3D imaging.
For achieving the above object, the present invention adopts following technical scheme:
On the one hand, a kind of Blast Furnace Raceway imaging system comprises for stock column three-dimensional imaging computing machine dead in the microwave measuring instrument of Blast Furnace Raceway depth survey and district, microwave measuring instrument comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module, high-frequency microwave transceiver module launches high-frequency microwave by the tested Blast Furnace Raceway of sky alignment, and receive reflection echo, echo is changed into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase, Signal-regulated kinase is nursed one's health zero intermediate frequency signals and is transported to digital signal processing module, three-dimensional imaging computing machine is sent to by human-machine interface module after the signal transacting of digital signal processing module, the range data recorded by microwave measuring instrument by three-dimensional imaging computing machine changes coordinate data into, and the 3-D view of dead stock column in district is fitted to according to coordinate data.
The quantity of described microwave measuring instrument is one or more, is equal angularly located at each ventilating opening place of blast furnace, and carries out depth survey to raceway zone respectively.
Described microwave measuring instrument also comprises power supply, powers respectively to high-frequency microwave transceiver module, Signal-regulated kinase and human-machine interface module.
On the one hand, a kind of Blast Furnace Raceway formation method comprises the following steps:
A. arrange several microwave measuring instrument at each ventilating opening place of blast furnace, each microwave measuring instrument comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module;
B. adopt microwave transceiver module to launch high-frequency microwave by the tested Blast Furnace Raceway of sky alignment, and receive reflection echo, echo changes into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase;
C. by Signal-regulated kinase zero intermediate frequency signals nursed one's health and transport to digital signal processing module, after the signal transacting of digital signal processing module, being sent to three-dimensional imaging computing machine by human-machine interface module;
D. the range data recorded by microwave measuring instrument by three-dimensional imaging computing machine changes coordinate data into, and fits to the 3-D view of dead stock column in district according to coordinate data.
In step C, the signal transacting of described digital signal processing module comprises the following steps:
C1.AD samples;
C2. digital filtering;
C3. Fourier frequency conversion, obtains spectrum signal;
C4. peak-seeking calculates frequency peak, and by barycenter of frequency spectrum correction method, and then converse corresponding distance value, to obtain raceway zone depth data.
In step D, the concrete steps of described three-dimensional imaging computing machine compositing 3 d images comprise:
D1. setting up coordinate system is the laggard row-coordinate conversion of coordinate figure by depth data transform, is stored in txt file by data message with the coordinate format needed;
D2. carry out the unified conversion process of coordinate system, make coordinate system be unified in coordinate system in blast furnace;
D3. carry out two-dimensional imaging design by the coordinate data collected, what form the interior dead stock column of raceway zone overlooks two dimensional image;
D4. calculate the size of dead stock column and height, and fit to the 3-D view of dead stock column in raceway zone.
In technique scheme, Blast Furnace Raceway of the present invention imaging system and formation method comprise for stock column three-dimensional imaging computing machine dead in the microwave measuring instrument of Blast Furnace Raceway depth survey and district, by launching high-frequency microwave to tested Blast Furnace Raceway, and receive reflection echo, echo is after mixing and filtering process changes into zero intermediate frequency signals, again zero intermediate frequency signals is nursed one's health, after signal transacting, the range data recorded by microwave measuring instrument by three-dimensional imaging computing machine changes coordinate data into, and fits to the 3-D view of dead stock column in district according to coordinate data.Adopt this imaging system and formation method effectively to measure the degree of depth of Blast Furnace Raceway, thus realize the 3D imaging of the dead stock column of furnace bottom.
Accompanying drawing explanation
Fig. 1 is the image-forming principle schematic diagram of imaging system of the present invention;
Fig. 2 is the theory diagram of microwave measuring instrument of the present invention;
When Fig. 3 is the present invention's dead stock column imaging, ordinate transform and gradient computational physics illustraton of model.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
Blast Furnace Raceway of the present invention imaging system and formation method
Incorporated by reference to Fig. 1, shown in Fig. 2, Blast Furnace Raceway of the present invention imaging system mainly comprises for stock column three-dimensional imaging computing machine 2 dead in the microwave measuring instrument 1 of Blast Furnace Raceway depth survey and district, microwave measuring instrument 1 comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module, high-frequency microwave transceiver module launches high-frequency microwave by sky alignment tested blast furnace 3 raceway zone, and receive reflection echo, echo is changed into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase, Signal-regulated kinase is nursed one's health zero intermediate frequency signals and is transported to digital signal processing module, three-dimensional imaging computing machine 2 is sent to by human-machine interface module after the signal transacting of digital signal processing module, the range data that microwave measuring instrument 1 records is changed into coordinate data by three-dimensional imaging computing machine 2, and the 3-D view of dead stock column in district is fitted to according to coordinate data.
Particularly, the quantity of described microwave measuring instrument 1 is one or more, is equal angularly located at each ventilating opening place of blast furnace, and carries out depth survey to raceway zone respectively.
Described high-frequency microwave transceiver module is responsible for the microwave signal needed for generation on the one hand, and is transmitted in space by antenna; Be responsible for the radar return after being received in measured medium surface reflection on the other hand, and the zero intermediate frequency signals that echoed signal changes into frequency lower through mixing and filtering process is exported to signal processing module.In view of the complex work environment of raceway zone industry spot, what high-frequency microwave transceiver module adopted is 5GHz, 10GHz and 26GHz band microwave signal, detects the degree of depth of Tuyere Raceway etc. and smelts information.
The signal condition of described Signal-regulated kinase (DSP) mainly carries out filtering to the analogue zero intermediate-freuqncy signal exported from high-frequency microwave transceiver module and obtains useful signal and amplify and be biased, and makes to output signal the inside AD input range meeting DSP and requires (0-3V).According to the zero intermediate frequency signals frequency formula after system mixing, and actual measurement distance R, sampling time T, modulating bandwidth B, microwave transmission speed c are substituted into the roughly frequency range of known zero intermediate frequency signals, select suitable frequency range design high pass and low-pass filter to come restraint speckle and aliasing according to actual conditions and useful signal is passed through.In order to increase signal intensity, automatic gain control amplifier (AGC) can be adopted carry out one-level amplification, then signal being biased, then the AD sampling unit of the signal input DSP through conditioning.
Described digital signal processing module is the control algorithm center of whole system, the main zero intermediate frequency signals that high-frequency microwave transceiver module is exported, simulating signal after conditioning carries out AD sampling, enter dsp chip and carry out digital filtering, and obtain spectrum signal through fast Fourier frequency transformation (FFT), correct through spectral centroid again and obtain required frequency peak after peak-seeking scheduling algorithm, just can obtain distance value according to formula.Although now obtain a large amount of echo information, also have a lot of original signal, the mode of data mining can be adopted, find coal injection of draught amount, the optimal proportion relation of the blow rate required and the raceway zone degree of depth.
Described human-machine interface module, its communication display board is mainly used in communicating with DSP core board, and the distance value calculated is presented on liquid crystal board, the design parameter of radar can also be set by button or infrared module simultaneously, also distance value be converted to 4-20mA standard industrial process signals or bus signal transmission to pulpit host computer.
Described microwave measuring instrument also comprises power supply, powers respectively to high-frequency microwave transceiver module, Signal-regulated kinase and human-machine interface module.
This Blast Furnace Raceway imaging system utilizes linear frequency to modulate, and realizes accurately beat signal frequency and estimate, then utilize the corresponding relation between beat signal frequency and target range to be measured to carry out indirect calculation and obtain range information.Its principle is as follows:
On a frequency hopping chronomere Δ t, receiving and transmitting signal frequency remains unchanged.Transmit
wherein ω is signal frequency,
for the initial phase that transmits, V
tfor the amplitude that transmits.If microwave transmission postpones τ=2R/c, then Received signal strength
through process such as mixing and filterings, can obtain
wherein B is signal bandwidth, and T is modulation period, and R is distance.Because signal bandwidth, the light velocity, modulation period are constant, as long as therefore record the frequency f of Beat Signal low frequency component V ' (t) ' can target range R be calculated.
Shown in Fig. 1 ~ Fig. 3, its concrete formation method comprises the following steps:
A. arrange several microwave measuring instrument 1 at each ventilating opening place of blast furnace 3, each microwave measuring instrument 1 comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module; Blast furnace generally has 16,32 or more windy mouth, angularly installs microwave measuring instrument 1, and each collection 8 or more data, generally measure twice on request.
B. adopt microwave transceiver module to launch high-frequency microwave by the tested Blast Furnace Raceway of sky alignment, and receive reflection echo, echo changes into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase;
C. by Signal-regulated kinase zero intermediate frequency signals nursed one's health and transport to digital signal processing module, after the signal transacting of digital signal processing module, being sent to three-dimensional imaging computing machine 2 by human-machine interface module by CAN 4;
D. change the range data that microwave measuring instrument 1 records into coordinate data by three-dimensional imaging computing machine 2, and fit to the 3-D view of dead stock column in district according to coordinate data.
In step C, the signal transacting of described digital signal processing module comprises the following steps:
C1.AD samples;
C2. digital filtering;
C3. Fourier frequency conversion, obtains spectrum signal;
C4. peak-seeking calculates frequency peak, and by barycenter of frequency spectrum correction method, and then converse corresponding distance value, to obtain raceway zone depth data.
In step D, the concrete steps of the 2-in-1 one-tenth 3-D view of described three-dimensional imaging computing machine comprise:
D1. setting up coordinate system is the laggard row-coordinate conversion of coordinate figure by depth data transform, is stored in txt file by data message with the coordinate format needed;
D2. carry out the unified conversion process of coordinate system, make coordinate system be unified in coordinate system in blast furnace; This is because the installation site of microwave measuring instrument during collection signal 1 is different, and the foundation of the data coordinate system therefore collected is different, needs the unified conversion process of carrying out coordinate system to make coordinate system be unified in coordinate system in blast furnace.
D3. carry out two-dimensional imaging design by the coordinate data collected, what form the interior dead stock column of raceway zone overlooks two dimensional image; Shown in Fig. 15 is this and overlooks two dimensional image.
D4. calculate the size of dead stock column and height, and fit to the 3-D view of dead stock column in raceway zone.Specific as follows:
The data collected with second time due to the data that collect of first time are front and back at molten iron discharging respectively and same position records, the height h declined by difference and the dead stock column of x coordinate can calculate the roughly gradient (empirical data is 30 ~ 50 degree) of dead stock column, and the height h that wherein dead stock column declines can be determined by the volume V of the molten iron discharged and material slag.
Size and the elevation information of dead stock column can be tried to achieve by above-mentioned experimental formula by raceway zone, adopt software programming information to be inputted computing machine and can draw 3-D view.Wherein also can considering the various influence factor to dead stock column, by adding program, 3-D view being revised, make it more meet true stock column feature.As shown in Figure 3, coordinate system transforms to coordinate system XYZ by X1Y1Z1, and in figure, a-a is in the cross section at ventilating opening place, and 6 is the downward slip region of coke, 7 is dead stock column, and 8 is the dead stock column gradient, and 9 is dead stock column height, 10 is blast furnace, and X1Y1Z1 is surving coordinate system, and XYZ is stove heart coordinate system.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (6)
1. a Blast Furnace Raceway imaging system, is characterized in that:
Comprise for stock column three-dimensional imaging computing machine dead in the microwave measuring instrument of Blast Furnace Raceway depth survey and district, microwave measuring instrument comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module, high-frequency microwave transceiver module launches high-frequency microwave by the tested Blast Furnace Raceway of sky alignment, and receive reflection echo, echo is changed into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase, Signal-regulated kinase is nursed one's health zero intermediate frequency signals and is transported to digital signal processing module, three-dimensional imaging computing machine is sent to by human-machine interface module after the signal transacting of digital signal processing module, the range data recorded by microwave measuring instrument by three-dimensional imaging computing machine changes coordinate data into, and the 3-D view of dead stock column in district is fitted to according to coordinate data.
2. Blast Furnace Raceway as claimed in claim 1 imaging system, is characterized in that:
The quantity of described microwave measuring instrument is one or more, is equal angularly located at each ventilating opening place of blast furnace, and carries out depth survey to raceway zone respectively.
3. Blast Furnace Raceway as claimed in claim 1 imaging system, is characterized in that:
Described microwave measuring instrument also comprises power supply, powers respectively to high-frequency microwave transceiver module, Signal-regulated kinase and human-machine interface module.
4. a Blast Furnace Raceway formation method, is characterized in that, comprises the following steps:
A. arrange several microwave measuring instrument at each ventilating opening place of blast furnace, each microwave measuring instrument comprises antenna, high-frequency microwave transceiver module, Signal-regulated kinase, digital signal processing module and human-machine interface module;
B. adopt microwave transceiver module to launch high-frequency microwave by the tested Blast Furnace Raceway of sky alignment, and receive reflection echo, echo changes into after zero intermediate frequency signals through mixing and filtering process and transports to Signal-regulated kinase;
C. by Signal-regulated kinase zero intermediate frequency signals nursed one's health and transport to digital signal processing module, after the signal transacting of digital signal processing module, being sent to three-dimensional imaging computing machine by human-machine interface module;
D. the range data recorded by microwave measuring instrument by three-dimensional imaging computing machine changes coordinate data into, and fits to the 3-D view of dead stock column in district according to coordinate data.
5., as the Blast Furnace Raceway formation method that claim 4 is stated, it is characterized in that:
In step C, the signal transacting of described digital signal processing module comprises the following steps:
C1.AD samples;
C2. digital filtering;
C3. Fourier frequency conversion, obtains spectrum signal;
C4. peak-seeking calculates frequency peak, and by barycenter of frequency spectrum correction method, and then converse corresponding distance value, to obtain raceway zone depth data.
6., as the Blast Furnace Raceway formation method that claim 4 is stated, it is characterized in that:
In step D, the concrete steps of described three-dimensional imaging computing machine compositing 3 d images comprise:
D1. setting up coordinate system is the laggard row-coordinate conversion of coordinate figure by depth data transform, is stored in txt file by data message with the coordinate format needed;
D2. carry out the unified conversion process of coordinate system, make coordinate system be unified in coordinate system in blast furnace;
D3. carry out two-dimensional imaging design by the coordinate data collected, what form the interior dead stock column of raceway zone overlooks two dimensional image;
D4. calculate the size of dead stock column and height, and fit to the 3-D view of dead stock column in raceway zone.
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Cited By (1)
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| CN106815405A (en) * | 2016-12-20 | 2017-06-09 | 武汉钢铁股份有限公司 | A kind of In Raceway Before Tuyere of Blast Furnace depth computing method and system |
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