CN208860482U - A kind of online infrared temperature monitoring system of AOD furnace - Google Patents
A kind of online infrared temperature monitoring system of AOD furnace Download PDFInfo
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- CN208860482U CN208860482U CN201821918710.2U CN201821918710U CN208860482U CN 208860482 U CN208860482 U CN 208860482U CN 201821918710 U CN201821918710 U CN 201821918710U CN 208860482 U CN208860482 U CN 208860482U
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- wireless power
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- temperature monitoring
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Abstract
The utility model relates to infrared temperature-test technology field, especially a kind of online infrared temperature monitoring system；The utility model includes cooling gas inlet, radiating light source entrance, optical path rotating part, the transmitting disk of wireless power supply, motor, infrared remote receiver, wireless transmitter, data processor, controller, bottom blowing entrance and host computer；The take-up reel of wireless power supply is rotated together with optical path rotating part, the transmitting disk of wireless power supply is fixed on the shell, the axis of motor passes through the center of wireless power supply transmitting disk, the transmitting disk and motor of wireless power supply are electrically connected with controller respectively, and infrared remote receiver and wireless transmitter are welded on data processor.The utility model can overcome the disturbing factors such as steam, carbon dioxide, dust, clinker in metallurgy environment are existing to influence using dual wavelength thermometry；Simultaneously online infrared measurement of temperature method can real-time control metallurgical process, measurement accuracy is high and low in cost.
Description
Technical field
The invention belongs to infrared temperature-test technology fields, especially relate to a kind of online infrared temperature monitoring system.
Background technique
Currently, 70% or so, the AOD purifying method that the stainless steel product of AOD furnace production has reached world's total growth can
The production efficiency and product quality for improving stainless steel product, have obtained quick development in the production of stainless steel product.Molten iron
Temperature be an important parameter in smelting process, in smelting process melt it is too high or too low for temperature can all influence production
It is normally carried out, the excessively high consumption that will increase deoxidier of molten iron temperature, heavy corrosion furnace lining makes the AOD furnace lost of life；Temperature mistake
Height can also increase the usage amount of carbon dust, ferrosilicon powder, and the impurity content being difficult to control in molten iron eventually leads to the impurity mistake of finished steel
More, alloy grain is excessive, Yi Fasheng crackle, while also increasing cost.And when the temperature of molten iron is too low, not only influence reduction
The generation of reaction can also have an impact the quality for taking off slag operation and alloy.The result of outlet temperature control not only affects conjunction
Recovery rate, the quality index of finished product of gold element also have emphatically the consumption of energy, service life of furnace lining etc. in smelting process
It influences.So temperature measurement be for the ingredient and casting quality of ferroalloy it is vital, if energy in AOD furnace smelting process
Strict temperature control is smelted by best curve, can be good at the productive profit for improving production efficiency and enterprise.
Traditional thermometric mode is using contact thermocouple thermometric in AOD furnace smelting process, and this method needs blowing out to measure,
And need operator close to high-temperature furnace body, not only exist to the personal safety of operator and threaten, also influences the progress smelted.
It being spent due to needing the molten iron temperature measured to be up to 1800, thermocouple material currently on the market cannot bear so high temperature more
Degree cannot achieve and measure for a long time, can only realize intermittent measurement, although platinum rhodium thermocouple fusing point is higher to be realized, and
And its is expensive, will lead to cost and increases.In terms of contactless direct measurement, infrared temperature-test technology is most widely used
, but existing infrared measurement of temperature product is not directly applicable metallurgy industry, there is survey mouth and chooses difficult and survey mouth temperature-compensating hardly possible
The problems such as.Therefore there is an urgent need for a kind of novel technical solutions in the prior art to solve the problems, such as this.
Summary of the invention
For above content, for the defect for solving the prior art, the present invention provides a kind of online infrared temperature monitoring of AOD furnace
System, it is at high cost effectively to solve existing contact temperature-measuring, and due to molten iron temperature height when measurement, risk is big, to measurement
The operation of personnel has the problems such as strict demand and intermittent spot measurement restrict metallurgical process control；Using bottom rifle as temperature
Sensing point is simply transformed AOD furnace bottom rifle on the basis of not influencing bottom rifle normal function, and improvement cost is low, simply may be used
It leans on and the service life is long；Simultaneously by selecting two suitable wavelength that can overcome the acquisition to radiation such as radiation background in furnace, flue dust
Caused by interfere.
The technical proposal for solving the technical problem of the invention is a kind of online infrared temperature monitoring system of AOD furnace, packet
Include cooling gas inlet, radiating light source entrance, optical filter, photodetector, detection circuit board, infrared transmitter, wireless power
Device, motor, infrared remote receiver, wireless transmitter, data processor, controller, bottom blowing entrance, rotating mechanism, hand-held display
Terminal and industrial personal computer, the wireless power supply include wireless power transmitting disk and take-up reel；The optical filter, photoelectricity are visited
It surveys device, detection circuit board, infrared transmitter, the take-up reel of wireless power supply and rotating mechanism and constitutes optical path rotating part；Institute
The photodetector and the detection circuit board stated are electrically connected；The infrared transmitter is welded on the detection circuit
On plate；The take-up reel of the optical filter, photodetector, detection circuit board and wireless power supply is each attached to the rotation
On rotation mechanism；The transmitting disk of the wireless power supply is fixed on the shell；The axis of the motor is filled across wireless power
The center for the transmitting disk set, and motor and rotating mechanism are coaxially disposed；The transmitting disk and motor of the wireless power supply point
It is not electrically connected with the controller；The infrared remote receiver and wireless transmitter is welded on the data processor
On.
Further, the quantity of the optical filter, photodetector, detection circuit board and infrared transmitter is two.
Further, the optical filter is infrared narrow-band pass filter.
Further, chip used in the transmit circuit of the wireless power supply is XKT-408 series integrated circuit
With T5336 series integrated circuit.
Further, chip used in the reception circuit of the wireless power supply is TD1583, output voltage 5V.
Further, the motor is stepper motor, and the power driving circuit of the stepper motor is by PMM8713 pulse
Distributor and SI-7300A analog line driver composition.
Further, the range of speeds of the rotating mechanism is 500 revs/min~1000 revs/min.
Further, CD4052 multi-channel switcher is provided in the detection circuit board.
Further, the chip of the infrared receiving circuit of the infrared remote receiver is CX20106.
Further, the hand-held display terminal uses intelligent touch screen.
Through the above design, the present invention can be brought the following benefits: be measured using contactless on-line continuous
Infrared measurement of temperature method can real-time control metallurgical process, can be completed under the premise of not damaging measured target temperature field temperature survey
Amount, measurement accuracy are relatively high and low in cost；Save the cost, simple and reliable, maintenance can be reached using bottom rifle thermometry
Small, bottom rifle changes small purpose；Dual wavelength thermometry can overcome steam, carbon dioxide, dust, furnace in metallurgy environment simultaneously
The disturbing factors such as slag are existing to be influenced, and its structure is simple.
Detailed description of the invention
Fig. 1 is the online infrared temperature monitoring system general structure schematic diagram of the utility model AOD furnace.
Fig. 2 is the online infrared temperature monitoring system wireless power supply transmit circuit figure of the utility model AOD furnace.
Fig. 3 is that the online infrared temperature monitoring system wireless power supply of the utility model AOD furnace receives circuit diagram.
Fig. 4 is the online infrared temperature monitoring system step motor control block diagram of the utility model AOD furnace.
Fig. 5 is the online infrared temperature monitoring system stepper motor power driving circuit figure of the utility model AOD furnace.
Fig. 6 is the online infrared temperature monitoring system temp measuring system functional block diagram of the utility model AOD furnace.
Fig. 7 is the online infrared temperature monitoring system pre-amplification circuit figure of the utility model AOD furnace.
Fig. 8 is the voltage-controlled low-pass filter circuit figure of the online infrared temperature monitoring system second order of the utility model AOD furnace.
Fig. 9 is the online infrared temperature monitoring system gain adjusting circuit figure of the utility model AOD furnace.
Figure 10 is the online infrared temperature monitoring system Data Infrared transmit circuit figure of the utility model AOD furnace.
Figure 11 is that the online infrared temperature monitoring system Data Infrared of the utility model AOD furnace receives circuit diagram.
In figure: 1, cooling gas inlet, 2, radiating light source entrance, 3, optical filter, 4, photodetector, 5, detection circuit
Plate, 6, infrared transmitter, 7, wireless power supply, 8, motor, 9, infrared remote receiver, 10, wireless transmitter, 11, data processing
Device, 12, controller, 13, bottom blowing entrance, 14, rotating mechanism, 15, optical path rotating part, 16, hand-held display terminal, 17, industry control
Machine.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated, it should be understood that specific embodiment described herein is only used to explain that this is practical
It is novel, it is not used to limit the utility model.
As shown in Figure 1, the online infrared temperature monitoring system of the utility model AOD furnace, including cooling gas inlet 1, radiation
It is light source entrance 2, optical filter 3, photodetector 4, detection circuit board 5, infrared transmitter 6, wireless power supply 7, motor 8, red
Outer receiver 9, wireless transmitter 10, data processor 11, controller 12, bottom blowing entrance 13, rotating mechanism 14, hand-held display are eventually
End 16 and industrial personal computer 17, the wireless power supply 7 include wireless power transmitting disk and take-up reel；The optical filter 3, light
Electric explorer 4, detection circuit board 5, infrared transmitter 6, the take-up reel of wireless power supply 7 and rotating mechanism 14 constitute optical path rotation
Transfer part point 15；The photodetector 4 and the detection circuit board 5 are electrically connected；The infrared transmitter 6 is welded on
In the detection circuit board 5；The optical filter 3, photodetector 4, detection circuit board 5 and wireless power supply 7 connect
Closing quotation is each attached on the rotating mechanism 14；The transmitting disk of the wireless power supply 7 is fixed on the shell；The electricity
The axis of machine 8 passes through the center of the transmitting disk of wireless power supply 7, and motor 8 and rotating mechanism 14 are coaxially disposed；It is described wireless
The transmitting disk and motor 8 of power supply unit 7 are electrically connected with the controller 12 respectively；The infrared remote receiver 9 and wireless
Transmitter 10 is welded on the data processor 11.
The optical filter 3, photodetector 4, detection circuit board 5 and infrared transmitter 6 quantity be two.
The optical filter 3 is infrared narrow-band pass filter, and central wavelength is respectively 800nm and 1000nm, and bandwidth is equal
It is 0.022 μm, peak transmittance 90%；The photodetector 4 uses LXD66MK silicon optical detector, spectral response
Range is 360-1100nm, and center response wave length is 900nm.
As shown in connection with fig. 1, radiant light is transformed into electric signal through photodetector 4, and the signal is through filtering and amplifying circuit, A/D
Conversion and preliminary operation, then send through infrared transmitter 6, then receive two path signal via infrared remote receiver 9, by counting
Processing operation is carried out according to processor 11, partial data is finally sent to host computer by wireless transmitter 10.Host computer is by holding
Display terminal 16 and 17 two parts of industrial personal computer composition, hand-held display end 16 and industrial personal computer 17 can be communicated individually with temperature measurer.It surveys
Wen Yi does power supply by lithium battery, and via controller 12 is processed into required voltage respectively to data processor 11, motor 8 and nothing
Line power supply unit 7 is powered.The power supply of the utility model optical path rotating part 15 uses wireless power mode, dotted line frame in Fig. 1
It is inside rotating body, wherein the take-up reel of wireless power supply 7 is with rotating therewith.
In conjunction with shown in Fig. 2, Fig. 3, the main chip used in the transmit circuit of wireless power supply 7 is XKT-408 system
Column integrated circuit and T5336 series integrated circuit.Wherein XKT-408 plays the role of handling wireless power transmission in circuit.
Chip used in the reception circuit of wireless power supply 7 is TD1583, output voltage 5V.
In conjunction with shown in Fig. 4, Fig. 5, the characteristics of for the utility model rotational structure, rotation of the chosen steps motor as optical path
Rotating motor.Stepper motor precision is high and motor appearance allows temperature high, can usually bear 100 degree or so of temperature, meet this reality
With novel working environment.The utility model realizes the control to stepper motor using special integrated chip cycle pulse distributor
System, the four phase step motor power driving circuit formed with PMM8713 pulsqe distributor and SI-7300A analog line driver, integrates
Degree height, good reliability.Step motor control block diagram is as shown in Figure 4.
Stepper motor drives the revolving speed of rotating mechanism 14 to control at 500 revs/min~1000 revs/min, it is unsuitable excessively high or
It is too low.Since load disk has the limitation of the factors such as constant weight and processing technology, so that it can not reach Mass Distribution
Uniformly, so disk has jitter phenomenon when disc rotation speed is too low, it is unfavorable for the accurate acquisition to optical signal, while to it
Mechanical structure serious wear.And revolving speed it is excessively high when, will cause acquisition optical signal lose the case where, be equally unfavorable for temperature measurement
Accuracy.
As shown in connection with fig. 6, detection circuit board 5 includes pre-amplification circuit, main filtering and amplifying circuit, gain adjusting circuit,
It is main to realize light path system to detection conditioning, conversion and the transfer function of radiant light.The main thought for designing circuit is to reach several
According to index to guarantee measurement accuracy, while also to guarantee the practicability and terseness of circuit system.Optical signals photodetector 4
Become electric signal, the premenstrual faint electric signal of senior general of putting amplifies, but is also exaggerated noise signal simultaneously, so and then
It devises filter circuit and frequency-selecting processing is carried out to signal.Then instrument is coped with through gain adjusting circuit, and radiation light intensity is used for a long time
The problem of variation is brought.Digital signal is finally converted analog signals into, through single-chip microcontroller primary Calculation, finally by infrared transmitter
The value in channel one and channel two is sent respectively to data processor 11 by 6, and data processor 11 handles the value in two channels
Host computer is sent data to by wireless transmitter 10 after calculating, host computer carries out integrated treatment and calculate to compensate to data again.
Because bottom rifle gun barrel is very long, measurement target is small, the collected signal of photodetector 4 is fainter, so connecing
Ying Xianyong amplifier does enhanced processing to signal after receiving signal, and operational amplifier is also able to achieve turning for current-voltage signal
It changes.The electric signal that photodetector 4 changes into optical signal is one not only faint and wherein also mix noisy signal, so
First temperature signal must therefrom be separated, this requires the pre-amplification circuits of design to allow for realizing low noise, and
Noise in circuit occurs mainly with the input terminal of first order amplifying circuit, so carrying out primary amplification stage, energy to signal
It is no to effectively filter out noise, the extraction of secondary amplification circuit and following temperature signal is had an important influence.
As shown in connection with fig. 7, the negative-feedback in circuit may be implemented the current signal of input becoming required voltage signal,
And it also can be realized certain amplification factor.
The output voltage of circuit such as following formula in Fig. 7:
In formula, f is the frequency of 4 output signal of light photodetector；If making the signal frequency in circuit
Meet f < < fh, U can be obtainedo=-R1I。
Signal condition is exactly plus filter circuit carries out frequency-selecting processing to signal, primarily to noise is effectively filtered out,
Improve the signal-to-noise ratio of whole system.The utility model uses filter circuit as shown in Figure 8, is placed on after pre-amplification circuit,
Purpose is the useless interference wave for filtering out preamplifier and inducing one.
According to the working frequency of temp measuring system, that the design selects is low-pass filter circuit, low-pass cut-off frequencies fH, it
Transmission function such as following formula:
In formula,If
Take R5=R6, cutoff frequency are as follows:
Voltage amplification factor are as follows:
Because bottom rifle, in use, since high temperature will cause oxidation, the corrosion of nozzle, will constantly shorten for a long time, this
The light that sample enters by bottom rifle inner tube is due to the large change of light path, and intensity can also have greatly changed, with bottom rifle
Shortening, the light intensity that photodetector 4 receives will increase, and in this way if the amplification factor of circuit is fixed, can be difficult to fit
Light intensity that should be so big changes, since the variation of the light intensity of spectral line required under different temperatures is also very big, so practical photodetection
Device 4 light intensity variation it is very huge, if without processing, will cause signal can not detect or overflow is saturated
The case where.Gain adjusting circuit is as shown in Figure 9.
Be provided with CD4052 multi-channel switcher in detection circuit board 5, the adjustment of gain adjusting circuit amplification factor be by
What CD4052 multi-channel switcher was realized, when signal is excessively weak by the control to CD4052 control terminal, in X0、X1、X2、X3Between
Switching improves amplification factor, keeps the signal strength of output appropriate, otherwise reduces amplification factor when signal is strong.It is readily seen the electricity
The voltage amplification factor on road are as follows:
RXTake R10、R11、R12、R13Difference, realize the transformation of amplification factor.
In the utility model, the data that two channels measure on rotational structure 14 will count respectively by infrared transmitter 6
It is for further processing according to launching, then by the reception of infrared remote receiver 9 of data processor 11.As shown in connection with fig. 10, infrared hair
Transmit-receive radio road is made of amplifying circuit and infrared transmitting tube.In conjunction with shown in Figure 11, infrared receiving circuit main devices are CX20106
Integrated circuit.
The utility model wireless transmission selection JZ863 data link, carrier frequency 433MHz, 5V transmission power 100mW,
By USB port and microprocessor direct communication, one kilometer of the nominal open ground maximum transmission distance of module.The utility model uses 3
The only Wireless Transmitter, uses the wireless two-way communication that data are realized in infrared measurement of temperature part and epigynous computer section respectively.It is infrared
The temperature signal that temperature measurement fraction measures is transferred to host computer by wireless transmitter 10, since the temperature is not true in furnace
Temperature, the only temperature near nozzle, Gas injection does not take into account the effect at gas-liquid two-phase interface, therefore host computer is also
Temperature-compensating need to be carried out according to information such as process flows.
This system epigynous computer section is divided into hand-held display terminal 16 and 17 two kinds of industrial personal computer, because using wireless transmission number
According to so hand-held display terminal 16 can be moved arbitrarily at thermometric scene.The display screen selection of hand-held display terminal 15 be can
Intelligent display mould group, i.e. intelligent touch screen are programmed, software is developed by its visualization interface and carries out interface and functional development, it is each right
As that can be communicated by writing script, the touch screen is using JavaScript as scripting language.
The foregoing is merely an embodiment of the present invention, are not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
It protects in range.
Claims (10)
1. a kind of online infrared temperature monitoring system of AOD furnace, it is characterised in that: enter including cooling gas inlet (1), radiating light source
Mouth (2), optical filter (3), photodetector (4), detection circuit board (5), infrared transmitter (6), wireless power supply (7), electricity
Machine (8), infrared remote receiver (9), wireless transmitter (10), data processor (11), controller (12), bottom blowing entrance (13), rotation
Rotation mechanism (14), hand-held display terminal (16) and industrial personal computer (17), the wireless power supply (7) include wireless power transmitting
Disk and take-up reel；The optical filter (3), photodetector (4), detection circuit board (5), infrared transmitter (6), wireless power
The take-up reel of device (7) and rotating mechanism (14) constitute optical path rotating part (15)；The photodetector (4) and described
Detection circuit board (5) is electrically connected；The infrared transmitter (6) is welded in the detection circuit board (5)；The filter
The take-up reel of mating plate (3), photodetector (4), detection circuit board (5) and wireless power supply (7) is each attached to the rotation
On rotation mechanism (14)；The transmitting disk of the wireless power supply (7) is fixed on the shell；The axis of the motor (8) passes through
The center of the transmitting disk of wireless power supply (7), and motor (8) and rotating mechanism (14) are coaxially disposed；The wireless power
The transmitting disk and motor (8) of device (7) are electrically connected with the controller (12) respectively；The infrared remote receiver (9) and
Wireless transmitter (10) is welded on the data processor (11).
2. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the optical filter
(3), the quantity of photodetector (4), detection circuit board (5) and infrared transmitter (6) is two.
3. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the optical filter (3)
For infrared narrow-band pass filter.
4. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the wireless power
Chip used in the transmit circuit of device (7) is XKT-408 series integrated circuit and T5336 series integrated circuit.
5. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the wireless power
Chip used in the reception circuit of device (7) is TD1583, output voltage 5V.
6. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the motor (8) is
Stepper motor, the power driving circuit of the stepper motor is by PMM8713 pulsqe distributor and SI-7300A analog line driver
Composition.
7. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the rotating mechanism
(14) the range of speeds is 500 revs/min~1000 revs/min.
8. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the detection circuit
Plate is provided with CD4052 multi-channel switcher on (5).
9. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the infrared receiver
The chip of the infrared receiving circuit of device (9) is CX20106.
10. the online infrared temperature monitoring system of AOD furnace according to claim 1, it is characterised in that: the hand-held display
Terminal (16) uses intelligent touch screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821918710.2U CN208860482U (en) | 2018-11-21 | 2018-11-21 | A kind of online infrared temperature monitoring system of AOD furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821918710.2U CN208860482U (en) | 2018-11-21 | 2018-11-21 | A kind of online infrared temperature monitoring system of AOD furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207838A (en) * | 2020-03-11 | 2020-05-29 | 中南大学 | Molten iron temperature measuring device based on special infrared spectrum wave band |
| CN113639874A (en) * | 2021-08-27 | 2021-11-12 | 长春工业大学 | On-line infrared measuring device and method for melt temperature in vacuum furnace |
-
2018
- 2018-11-21 CN CN201821918710.2U patent/CN208860482U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207838A (en) * | 2020-03-11 | 2020-05-29 | 中南大学 | Molten iron temperature measuring device based on special infrared spectrum wave band |
| CN113639874A (en) * | 2021-08-27 | 2021-11-12 | 长春工业大学 | On-line infrared measuring device and method for melt temperature in vacuum furnace |
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