CN108240873A - A kind of station boiler sound wave thermometric sending device - Google Patents
A kind of station boiler sound wave thermometric sending device Download PDFInfo
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- CN108240873A CN108240873A CN201810085785.5A CN201810085785A CN108240873A CN 108240873 A CN108240873 A CN 108240873A CN 201810085785 A CN201810085785 A CN 201810085785A CN 108240873 A CN108240873 A CN 108240873A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
- G01K11/24—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of the velocity of propagation of sound
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- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
A kind of station boiler sound wave thermometric sending device of the present invention, belongs to station boiler sound wave thermometric sending device technical field；Technical problem to be solved is：It is simple in structure to provide one kind, uses simplicity, the station boiler sound wave thermometric sending device of high certainty of measurement；Solve technical solution that the technical problem uses for：Including central controller, power amplifier device, optical coupling isolation device, transducer drive device, the signal output end of the central controller is connected with the input terminal of power amplifier device, the output terminal of the power amplifier device is connected with the input terminal of optical coupling isolation device, and the output terminal of the optical coupling isolation device is connected with the input terminal of transducer drive device；The output terminal of the transducer drive device is provided with sound wave emission port, and the thermometric sound wave that the sound wave emission port generates is received after passing through station boiler furnace chamber by acoustic receiver device；The output terminal of the acoustic receiver device is connected with the signal input part of central controller；The present invention is applied to station boiler temperature measuring equipment.
Description
Technical field
A kind of station boiler sound wave thermometric sending device of the present invention belongs to station boiler sound wave thermometric sending device technology neck
Domain.
Background technology
The energy is the key that the national economic development and social stability, in China's energy resource structure, thermal power generation energy supply accounting
70% or so, and boiler, as one of three big capital equipment of power plant, its safe and highly efficient operation directly influences the economy of unit
Property and safety, station boiler is in view of its huge energy consumption and product withdraw situation, and early oneself becomes the important supervision pair of Chinese Ministry of Environmental Protection
As；Since the combustion process in furnace of power-plant boilers is a kind of extremely complex suspension combustion, stream, transient changing, work are carried at random
Condition is unstable, if not can determine that the temperature field in burner hearth, boiler operating state suitably cannot be adjusted in time, by pole
Fuel particle incomplete combustion is easily led to, boiler thermal efficiency reduces, and unit operation economy declines, and can generate more nitrogen oxidations
The pollutants such as object and dust, village, deflection, wash away water-cooling wall, may cause to shut down in flame, are more likely to that the safe things such as booster occur
Therefore；Therefore the temperature field in boiler furnace is monitored just seems particularly significant.
Boiler hearth temperature measuring method mainly have thermocouple temperature measurement, Red external spectrums thermometric, optical fiber temperature-measurement, good fortune penetrate thermometric,
Laser spectrum thermometric and acoustic thermometry etc.；
During thermocouple temperature measurement need measurement end is directly contacted with temperature field to be measured, due to stove chamber inner combustion pulse, thermocouple with
Environment is difficult to reach thermal balance, and the heatproof limitation due to thermocouple and measurement method so that this method can only be surveyed the short time
Amount single point temperature, high failure rate, operating quantity are big；
Infrared spectrum thermometric is because generating gas componant and content complexity, there are a large amount of interference and inhaling in burner hearth combustion process
It receives, causes error larger；
Optical fiber temperature-measurement is the supplement and raising to traditional temp measuring method, skilful on its surface using the sapphire of the resistance to high humiditys of W as matrix
Metal foil Mo Xing Cheng body cavity, thermometric mode is similar to thermocouple, but has many advantages, such as that service life is long, and dynamic response is fast, so
And fibre optical sensor is there are at high price, can only local thermometric the shortcomings of；
Case penetrates temp measuring method using Planck radiation laws, flame image is absorbed using camera, according to duochrome method radiation temperature
Testing principle carries out in-furnace temperature calculating, and with the development of computer, flame Image Processing technical prospect is wide, but is surveyed in real time
There are technology short slabs in terms of amount and three dimensional displacement fields, and reduction apparatus and method are still immature；
The basic principle of laser spectrum thermometric be Boltzmann equation by arranging a plurality of light path, can realize the space in temperature field
It measures, but is primarily now confined to the experimental study stage, there are many more research work needs to do.
Sound wave thermometric is in the different principle of the Propagation speed of different temperatures, by arranging multiple sound using sound
Wave sensor forms sound wave hygrometric path network, and the reproduction of fire box temperature field, tool are carried out according to corresponding reconstruction of temperature field algorithm
There is a real time on-line monitoring, response is fast, small to former temperature field interference effect, the advantages that adapting to the adverse circumstances such as high temperature, more dirt, sound
It learns thermometry and compares application of the above-mentioned other temp measuring methods more suitable for thermal power plant's station boiler thermometric；In station boiler
Temperature field is an important factor for determining boiler safety, economical operation, energy-saving and emission-reduction, and acoustic thermometry technology is as a kind of advanced non-
Contact thermography technology has many advantages, such as real time on-line monitoring, measurement of full field, has in terms of boiler hearth temperature field measurement
Good application prospect.
External acoustic thermometry technical research is more early, and has put it into commercial operation, and domestic this respect research starting is than later, in state
Under the research of interior numerous scholars, interim progress is also achieved, but reconstruction of temperature field precision also needs to further improve, in temperature
Temperature profile effect is only considered in the reconstruction process of field, do not count flow；Another factor be exactly by
The restriction of pinger structure function itself, complicated, cost is higher, and short life, measurement accuracy is unstable, although installing additional
Acoustic waveguide tube can solve the problems, such as this, but this can generate Acoustic Wave Propagation certain influence, therefore the transmission of sound wave thermometric is filled
It puts and is improved just very urgently.
Invention content
To overcome the shortcomings of the prior art, technical problem to be solved is the present invention：It is simple in structure to provide one kind,
Use simplicity, the station boiler sound wave thermometric sending device of high certainty of measurement；In order to solve the above-mentioned technical problem, the present invention uses
Technical solution be：A kind of station boiler sound wave thermometric sending device, including central controller, power amplifier device, optocoupler every
From device, transducer drive device, the signal output end of the central controller is connected with the input terminal of power amplifier device, institute
The output terminal for stating power amplifier device is connected with the input terminal of optical coupling isolation device, and the output terminal of the optical coupling isolation device is with changing
The input terminal of energy device driving device is connected；
The output terminal of the transducer drive device is provided with sound wave emission port, the thermometric sound that the sound wave emission port generates
Wave is received after passing through station boiler furnace chamber by acoustic receiver device；
The output terminal of the acoustic receiver device is connected with the signal input part of central controller.
The circuit structure of the power amplifier device, optical coupling isolation device and transducer drive device is：
The signal output end of the central controller is connected with 3 feet of voltage comparator U1；
2 feet of the voltage comparator U1 successively and one end of connecting resistance R2, one end phase behind one end of capacitance C1 with resistance R1
Even, it is grounded after the other end of the other end shunt-wound capacitance C1 of the resistance R2, another termination 3.3V input electricity of the resistance R1
Source；
The 4 feet ground connection of the voltage comparator U1；
8 feet of the voltage comparator U1 connect 15V input powers；
It is connected behind 1 foot of the voltage comparator U1 and one end of connecting resistance R3 with 2 feet of photoelectrical coupler U2；
3 feet of the photoelectrical coupler U2 and 5 feet ground connection；
One end of 8 feet of the photoelectrical coupler U2 and connecting resistance R4 is connected with 16V input powers behind one end of capacitance C2, institute
State the other end ground connection of capacitance C2；
The other end of 6 feet of the photoelectrical coupler U2 and connecting resistance R4, the grid phase after the grid of metal-oxide-semiconductor Q1 with metal-oxide-semiconductor Q2
Even；
Between the grid and source electrode of the metal-oxide-semiconductor Q1 and resistance R5 is connected to, between the grid and source electrode of the metal-oxide-semiconductor Q2 and is connected to
Resistance R6；
Between the source electrode of the metal-oxide-semiconductor Q1 and drain electrode and it is connected to zener diode D1,
Between the source electrode of the metal-oxide-semiconductor Q2 and drain electrode and it is connected to zener diode D2；
It is connected behind the drain electrode of the metal-oxide-semiconductor Q1 and one end of connecting resistance R7 with an input terminal of transformer T1,
It is connected behind one end of the drain electrode shunt-wound capacitance C3 of the metal-oxide-semiconductor Q2 with another input terminal of transformer T1, the capacitance
The other end of C3 is connected with the other end of resistance R7；
It is connected behind an output terminal of the transformer T1 and one end of connecting resistance R8 with sound wave emission port P1, the transformer
It is connected after another output terminal series diode D3 of T1 with the other end of resistance R8.
The model LM293 of the voltage comparator U1；The model HCNW4503 of the photoelectrical coupler U2.
The central controller is also associated with display and keyboard.
The present invention has the beneficial effect that relative to what the prior art had：The present invention is more by being set in sound wave sending device
Duan Fang great and isolation circuit can receive the square-wave signal of central controller transmission and be amplified, can be in station boiler
The temperature of portion's different parts measures, and restores the temperature field of boiler internal, and entire temperature measuring equipment is simple in structure, is measuring
Multiple sound wave sending devices can be freely set to according to actual conditions to any position in electric boiler periphery in the process, using simplicity,
Using sound wave thermometric mode, temperature measurement on-line can be carried out, high certainty of measurement is disturbed small, can promote the use of.
Description of the drawings
The present invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the electrical block diagram of the present invention；
In figure：1 it is central controller, 2 be power amplifier device, 3 be optical coupling isolation device, 4 be transducer drive device, 5 is
Acoustic receiver device.
Specific embodiment
As depicted in figs. 1 and 2, a kind of station boiler sound wave thermometric sending device of the present invention, including central controller 1, work(
Rate amplifying device 2, optical coupling isolation device 3, transducer drive device 4, the signal output end of the central controller 1 are put with power
The input terminal of big device 2 is connected, and the output terminal of the power amplifier device 2 is connected with the input terminal of optical coupling isolation device 3, described
The output terminal of optical coupling isolation device 3 is connected with the input terminal of transducer drive device 4；
The output terminal of the transducer drive device 4 is provided with sound wave emission port, the thermometric that the sound wave emission port generates
Sound wave is received after passing through station boiler furnace chamber by acoustic receiver device 5；
The output terminal of the acoustic receiver device 5 is connected with the signal input part of central controller 1.
The circuit structure of the power amplifier device 2, optical coupling isolation device 3 and transducer drive device 4 is：
The signal output end of the central controller 1 is connected with 3 feet of voltage comparator U1；
2 feet of the voltage comparator U1 successively and one end of connecting resistance R2, one end phase behind one end of capacitance C1 with resistance R1
Even, it is grounded after the other end of the other end shunt-wound capacitance C1 of the resistance R2, another termination 3.3V input electricity of the resistance R1
Source；
The 4 feet ground connection of the voltage comparator U1；
8 feet of the voltage comparator U1 connect 15V input powers；
It is connected behind 1 foot of the voltage comparator U1 and one end of connecting resistance R3 with 2 feet of photoelectrical coupler U2；
3 feet of the photoelectrical coupler U2 and 5 feet ground connection；
One end of 8 feet of the photoelectrical coupler U2 and connecting resistance R4 is connected with 16V input powers behind one end of capacitance C2, institute
State the other end ground connection of capacitance C2；
The other end of 6 feet of the photoelectrical coupler U2 and connecting resistance R4, the grid phase after the grid of metal-oxide-semiconductor Q1 with metal-oxide-semiconductor Q2
Even；
Between the grid and source electrode of the metal-oxide-semiconductor Q1 and resistance R5 is connected to, between the grid and source electrode of the metal-oxide-semiconductor Q2 and is connected to
Resistance R6；
Between the source electrode of the metal-oxide-semiconductor Q1 and drain electrode and it is connected to zener diode D1,
Between the source electrode of the metal-oxide-semiconductor Q2 and drain electrode and it is connected to zener diode D2；
It is connected behind the drain electrode of the metal-oxide-semiconductor Q1 and one end of connecting resistance R7 with an input terminal of transformer T1,
It is connected behind one end of the drain electrode shunt-wound capacitance C3 of the metal-oxide-semiconductor Q2 with another input terminal of transformer T1, the capacitance
The other end of C3 is connected with the other end of resistance R7；
It is connected behind an output terminal of the transformer T1 and one end of connecting resistance R8 with sound wave emission port P1, the transformer
It is connected after another output terminal series diode D3 of T1 with the other end of resistance R8.
The model LM293 of the voltage comparator U1；The model HCNW4503 of the photoelectrical coupler U2.
The central controller 1 is also associated with display and keyboard.
The present invention provides a kind of sound wave thermometric sending device, measures and obtains during electric boiler burner hearth internal temperature field is rebuild
Propagation time of the sound wave accurately emitted in burner hearth is obtained, needs to consider Acoustic Wave Propagation road during another aspect reconstruction of temperature field
Diameter is generated curvature effect and measurement result can be made to have error due to temperature field in burner hearth and flow field effect；It can by acoustic thermometry principle
Know, propagation distance of the sound wave on every paths can be obtained by measuring, and be crossed so only needing to obtain one group of sound wave
Time data more, it is possible to complete to rebuild by the temperature field in boiler section to be measured, it is therefore desirable to sound wave temp measuring system be set
The data of time of flying over to sound wave are acquired, and the central controller 1 that collected data are sent to microcontroller is done into one
The processing of step, the final reconstruction realized to boiler internal two-dimensional temperature field.
The sound wave thermometric sending device is by controlling voltage comparator U1 that PWM terminals are connected to the letter of central controller 1
In number output pin, the pwm signal that microcontroller generates is allow to pass through radiating circuit, transmitter is driven to work；In order to control
Voltage is amplified, and transformer T1 and manifold type circuit can be set to complete boosting, while transformer T1, metal-oxide-semiconductor Q1 and Q2 structure
Into inverter circuit, the direct current signal of input is become into AC signal, by driving circuit output signal driving transformer T1,
Metal-oxide-semiconductor Q1 and Q2 form single end driver mode, and wherein metal-oxide-semiconductor plays on-off action, and when input signal is high voltage, metal-oxide-semiconductor is beaten
It opens, transformer output terminal exports a low level signal, and when the signal of input is low-voltage, metal-oxide-semiconductor is closed, transformer output
One high level signal of end output, AC signal of the signal after transformer and metal-oxide-semiconductor become boosting, is loaded into energy converter drive
On dynamic device 4, cause the vibration of acoustic wave transducer, sound is sent.
The ADC pins that the output of the acoustic receiver device 5 terminates to central controller 1 carry out analog-to-digital conversion.
When in use, it can realize that central controller 1 sends out the square wave of specific frequency by programming, central controller 1 is sent out
The square-wave signal gone out is amplified by power amplifier device 2, then drive optical coupling isolation device 3, realize power supply with control
Ground is isolated, and transducer driver vibration is caused to generate sound wave finally by transducer drive device 4.
In entire sound wave transmission circuit, resistance R1, R2, capacitance C1 and voltage comparator U1 composition power amplification circuits,
Resistance R3, R4, capacitance C2 and photoelectrical coupler U2 composition optical coupling isolation circuits, metal-oxide-semiconductor Q1, Q2 and transformer T1 compositions are inverse
Become booster circuit, that is, transducer driving circuit, the direct current signal of input can be become high-voltage AC signal, so as to drive energy converter
Vibration, in addition resistance R5 and R6 is both that current-limiting resistance plays pull down resistor, the effect difference of zener diode D1 and D2 again
It is to prevent the reverse current of metal-oxide-semiconductor Q1, Q2 are excessive from burning out metal-oxide-semiconductor.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (4)
1. a kind of station boiler sound wave thermometric sending device, it is characterised in that：Including central controller（1）, power amplifier device
（2）, optical coupling isolation device（3）, transducer drive device（4）, the central controller（1）Signal output end and power amplification
Device（2）Input terminal be connected, the power amplifier device（2）Output terminal and optical coupling isolation device（3）Input terminal be connected,
The optical coupling isolation device（3）Output terminal and transducer drive device（4）Input terminal be connected；
The transducer drive device（4）Output terminal be provided with sound wave emission port, the survey that the sound wave emission port generates
Warm sound wave pass through station boiler furnace chamber after by acoustic receiver device（5）It receives；
The acoustic receiver device（5）Output terminal and central controller（1）Signal input part be connected.
2. a kind of station boiler sound wave thermometric sending device according to claim 1, it is characterised in that：The power amplification
Device（2）, optical coupling isolation device（3）With transducer drive device（4）Circuit structure be：
The central controller（1）Signal output end be connected with 3 feet of voltage comparator U1；
2 feet of the voltage comparator U1 successively and one end of connecting resistance R2, one end phase behind one end of capacitance C1 with resistance R1
Even, it is grounded after the other end of the other end shunt-wound capacitance C1 of the resistance R2, another termination 3.3V input electricity of the resistance R1
Source；
The 4 feet ground connection of the voltage comparator U1；
8 feet of the voltage comparator U1 connect 15V input powers；
It is connected behind 1 foot of the voltage comparator U1 and one end of connecting resistance R3 with 2 feet of photoelectrical coupler U2；
3 feet of the photoelectrical coupler U2 and 5 feet ground connection；
One end of 8 feet of the photoelectrical coupler U2 and connecting resistance R4 is connected with 16V input powers behind one end of capacitance C2, institute
State the other end ground connection of capacitance C2；
The other end of 6 feet of the photoelectrical coupler U2 and connecting resistance R4, the grid phase after the grid of metal-oxide-semiconductor Q1 with metal-oxide-semiconductor Q2
Even；
Between the grid and source electrode of the metal-oxide-semiconductor Q1 and resistance R5 is connected to, between the grid and source electrode of the metal-oxide-semiconductor Q2 and is connected to
Resistance R6；
Between the source electrode of the metal-oxide-semiconductor Q1 and drain electrode and it is connected to zener diode D1,
Between the source electrode of the metal-oxide-semiconductor Q2 and drain electrode and it is connected to zener diode D2；
It is connected behind the drain electrode of the metal-oxide-semiconductor Q1 and one end of connecting resistance R7 with an input terminal of transformer T1,
It is connected behind one end of the drain electrode shunt-wound capacitance C3 of the metal-oxide-semiconductor Q2 with another input terminal of transformer T1, the capacitance
The other end of C3 is connected with the other end of resistance R7；
It is connected behind an output terminal of the transformer T1 and one end of connecting resistance R8 with sound wave emission port P1, the transformer
It is connected after another output terminal series diode D3 of T1 with the other end of resistance R8.
3. a kind of station boiler sound wave thermometric sending device according to claim 2, it is characterised in that：The voltage compares
The model LM293 of device U1；The model HCNW4503 of the photoelectrical coupler U2.
4. a kind of station boiler sound wave thermometric sending device according to claim 1, it is characterised in that：The center control
Device（1）It is also associated with display and keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085785.5A CN108240873A (en) | 2018-01-29 | 2018-01-29 | A kind of station boiler sound wave thermometric sending device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085785.5A CN108240873A (en) | 2018-01-29 | 2018-01-29 | A kind of station boiler sound wave thermometric sending device |
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| Publication Number | Publication Date |
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| CN108240873A true CN108240873A (en) | 2018-07-03 |
Family
ID=62698806
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| CN201810085785.5A Pending CN108240873A (en) | 2018-01-29 | 2018-01-29 | A kind of station boiler sound wave thermometric sending device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537101A (en) * | 2020-06-02 | 2020-08-14 | 上海电机学院 | Ultrasonic wave flight time estimation method for power station boiler temperature measurement system |
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Application publication date: 20180703 |