CN105953947B - The calibration equipment of boiler sound wave temperature measuring equipment - Google Patents
The calibration equipment of boiler sound wave temperature measuring equipment Download PDFInfo
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- CN105953947B CN105953947B CN201610534121.3A CN201610534121A CN105953947B CN 105953947 B CN105953947 B CN 105953947B CN 201610534121 A CN201610534121 A CN 201610534121A CN 105953947 B CN105953947 B CN 105953947B
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- control unit
- sound wave
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- temperature measuring
- noise source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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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
Abstract
The present invention relates to the calibration equipments of boiler sound wave temperature measuring equipment, belong to the engineering device technique field of boiler combustion technological evaluation and the monitoring of combustion completion reliability service.The present invention solves the problems, such as manufacture verification and the field-checking of the boiler hearth temperature measuring apparatus of sound wave temperature-measurement principle.The present invention includes input unit, main control unit, selecting switch, programmable delay unit, secondary noise source and amplitude control unit, input unit is connected by selecting switch with main control unit, and main control unit connects programmable delay unit, secondary noise source, amplitude control unit and man-machine interface respectively；Input unit and amplitude control unit connect the both ends of verified device respectively；The path being made of input unit, main control unit, selecting switch, programmable delay unit, secondary noise source and amplitude control unit is at least provided with one.The boiler that the present invention is burnt by electronics pattern simulation can generate different temperature fields, noisy ambient noise, can also assess the technical performance of equipment under test.
Description
Technical field
The present invention relates to the calibration equipments of boiler sound wave temperature measuring equipment, belong to boiler combustion technological evaluation and combustion completion
The engineering device technique field of reliability service monitoring.
Background technology
Boiler is the important production equipment of thermal power generation corporations, the economy and stability of operation, is related to power generation enterprise
The competitiveness of industry and safety also relate to important environmental issue.It is reported that in thermoelectricity cost, fuel cost is general
More than 70% is accounted for, therefore, if boiler combustion is optimized, it is possible to reduce coal consumption, improve generating efficiency.Boiler combustion parameter
Measurement, measuring instrument also just become necessary, and wherein fire box temperature measurement is then whether assessing boiler combustion fully and prevents from firing
Burn the important evidence of the security monitorings such as deflection.This causes boiler furnace temperature measuring equipment to seem of crucial importance.As shown in Figure 1, sound wave
Temperature-measurement principle is：Boiler cavity both sides are provided with left side station and right side station, two stations are both provided with electroluminescent phonation unit
And sensor, from the signal that station electroluminescent phonation unit in left side is sent out by known boilers cavity length, by the time of flying over, such as
Shown in Fig. 2, reach right side station sensor.Fly over the time can by left side, right side station sensor signal discretization simultaneously
Correlation is done to obtain.According to following formula, then the average speed of sonic transmissions at this temperature can be obtained.And sound in gas
Spread speed has functional relation with temperature, and then obtains sound source to the current mean temperature T in the different paths of sensor.
In formula：V is the average speed (m/s) for the acoustic wave propagation path that can be calculated；S is that the sound wave that can be surveyed passes
Broadcast the distance (m) in path；T is flying over the time (s) for acoustic wave propagation path；R is the specific heats of gases, and the specific heat of gas is under normal pressure
One constant；R is mol gas constant (8.314J/mol)；T is absolute temperature (K)；M is gas molar weight (kg/mol).
As shown in figure 3, each layer is provided with 8 stations in boiler cavity in the prior art, each station sets electroluminescent hair
Sound unit and sensor, transmission path are as shown in Figure 4.Principle is as follows：One of station sends out sound around as sound source
Wave signal, six stations of surrounding then start to receive signal.Same principle in Fig. 1 and Fig. 2, it is known that path length,
According to the transmission time of sound wave, it is possible to know the average speed under Current Temperatures.After obtaining the mean temperature in each path, object
By furnace cavity piecemeal in reason, and then construct accurate temperature field in furnaces.
The prior art has the following problems：(1) sound wave temperature measuring equipment manufacture can not possibly be verified with the boiler of burning, be fired
Burn with high costs, floor space is huge, and to realize that wide temperature range is simulated, and cost is very high；(2) equally, in operation
The periodic calibration of sound wave temperature measuring equipment accuracy is difficult to solve, because of the burning gases noise in boiler and Acoustic wave measuring apparatus institute
The noise mixing sent out, causes its operating condition extremely complex；(3) input pattern of different verified devices is different, there is compression
Air beep pattern and electroluminescent beep pattern, different patterns use different calibration equipments, poor universality；(4) how to judge
The performance of Acoustic wave measuring apparatus under bad working environments, at present also without effective means.
Invention content
It is an object of the invention to overcome drawbacks described above existing for existing Acoustic wave measuring apparatus, it is proposed that a kind of boiler sound wave
The calibration equipment of temperature measuring equipment, the boiler to be burnt by electronics pattern simulation generates different temperature fields, noisy background is made an uproar
Sound solves the problems, such as manufacture verification and the field-checking of the boiler hearth temperature measuring apparatus of sound wave temperature-measurement principle, meanwhile, may be used also
To assess the technical performance of equipment under test.
The present invention is realized using following technical solution：A kind of calibration equipment of boiler sound wave temperature measuring equipment, including
Input unit, main control unit, selecting switch, programmable delay unit, secondary noise source and amplitude control unit, input unit pass through
Selecting switch is connected with main control unit, main control unit connect respectively programmable delay unit, secondary noise source, amplitude control unit and
Man-machine interface；Input unit and amplitude control unit connect the both ends of verified device respectively；By input unit, main control unit,
The path that selecting switch, programmable delay unit, secondary noise source and amplitude control unit are formed is at least provided with one.
Further, when verified device is provided with the solenoid valve of control compressed air break-make, input unit is used by leading
The compressed air sounding input unit that noise source and on off state collecting unit are formed, the pattern are compressed air beep pattern.
Further, under compressed air beep pattern, the coil of solenoid valve is connected on off state collecting unit, master control list
The status information of member acquisition on off state collecting unit simultaneously judges whether the path works, right when the coil working of solenoid valve
Path is answered to send out the sound wave of thermometric.
Further, under compressed air beep pattern, main noise source is at least set according to the number of probes of verified device
A paths are equipped with, number and main control unit, selecting switch, programmable delay unit, secondary noise source and the amplitude in path control
The path number that unit is formed is consistent, and all there are one programmable delay unit, retardation is controlled each paths by main control unit；
Main noise source after branch is respectively there are one independent amplitude control unit, for adjusting the amplitude of useful signal.
Further, it is independent and uncorrelated between secondary noise source under compressed air beep pattern, the width of each noise source
It is worth individually controllable, the noise of each paths output is made of main noise source and time noise source superposition, and the noise of synthesis passes through width
Value control unit is sent to the sensor or vibration stimulus source of verified device, and sensor is connected with sound wave temperature measuring equipment；Vibration
Driving source driving sensor generates vibration.
Further, when verified device is provided with loud speaker exciting signal source, input unit is used by analog acquisition list
The electroluminescent sounding input unit that member is formed, the pattern are electroluminescent beep pattern.
Further, under electroluminescent beep pattern, loud speaker exciting signal source is connected with the input terminal of analog acquisition unit, main
Control unit acquisition analog acquisition unit is connected and judges whether the path works, when exciting signal source works, respective path hair
Go out the sound wave of thermometric.
Further, under electroluminescent beep pattern, analog acquisition unit is according to the loud speaker exciting signal source of verified device
Number is at least provided with a paths, number and main control unit, selecting switch, programmable delay unit, the secondary noise source in path
Consistent with the path number that amplitude control unit is formed, all there are one programmable delay unit, main control units pair for each paths
Signal after delay is controlled into line amplitude, simulates scene attenuation or transducer range overflows.
Further, under electroluminescent beep pattern, the number of secondary noise source is consistent with loud speaker exciting signal source number, often
All there are one time noise source, secondary noise source amplitude is controlled one paths by amplitude control unit, and the Signal averaging in all paths closes
The signal being contaminated into one, for simulating the soot blowing noise of the background noise of boiler combustion or boiler attendance.
Further, under electroluminescent beep pattern, the signal after synthesis is again introduced into amplitude control unit, is directly sent to sound wave
The sensor of temperature measuring equipment either vibration stimulus source, sensor are connected with sound wave temperature measuring equipment；Vibration stimulus source driving sensing
Device generates vibration.
The beneficial effects of the invention are as follows：
(1) calibration equipment of boiler sound wave temperature measuring equipment of the present invention realizes the simulation of temperature field in furnaces, and
It temperature field can be adjustable with real-time online；
(2) calibration equipment of boiler sound wave temperature measuring equipment of the present invention can run preset program, simulation
Boiler heating, holding, fluctuation, the dynamic operation condition to cool down；
(3) calibration equipment of boiler sound wave temperature measuring equipment of the present invention can be output to sensor to every channel
Pumping signal add different noises, the noisy ambient noise of simulation boiler, the circuit that can test verified equipment is differentiated
Ability and algorithm process level；
(4) calibration equipment of boiler sound wave temperature measuring equipment of the present invention can be output to sensor to every channel
The adjustment of pumping signal amplitude, the circuit resolution capability of verified equipment and algorithm process level can be tested；So it solves
The manufacture verification of sound wave temperature measuring equipment and field-checking problem, at the same time it can also assess the technical performance of equipment under test.
Description of the drawings
Fig. 1 is sound wave temperature measuring equipment basic principle figure.
Fig. 2 is the collected sound wave of sensor propagation delay schematic diagram in air.
Fig. 3 is sensor placement location structure diagram.
Fig. 4 is the collected Acoustic Wave Propagation active path figure of sensor.
Fig. 5 is the general diagram of the present invention.
Fig. 6 is block diagram of the present invention in compressed air sound source pattern.
Fig. 7 is block diagram of the present invention in electroluminescent beep pattern.
In figure：1st, solenoid valve or loud speaker exciting signal source；2nd, burner hearth.
Specific implementation
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment one：
As shown in figure 5, a kind of calibration equipment of boiler sound wave temperature measuring equipment, is opened including input unit, main control unit, selection
Pass, programmable delay unit, secondary noise source and amplitude control unit, input unit are connected by selecting switch with main control unit,
Main control unit connects programmable delay unit, secondary noise source, amplitude control unit and man-machine interface respectively；Input unit and amplitude
Control unit connects the both ends of verified device respectively；By input unit, main control unit, selecting switch, programmable delay unit,
The path that secondary noise source and amplitude control unit are formed is at least provided with one.
When verified device is provided with the solenoid valve of control compressed air break-make, input unit is used by main noise source and is opened
The compressed air sounding input unit that off status collecting unit is formed, the pattern are compressed air beep pattern.
Under compressed air beep pattern, the coil of solenoid valve is connected on off state collecting unit, and main control unit acquisition is opened
The status information of off status collecting unit simultaneously judges whether the path works, when the coil working of solenoid valve, respective path hair
Go out the sound wave of thermometric.
Under compressed air beep pattern, main noise source is according to the number of probes of verified device at least provided with Yi Tiaolu
Diameter, number and main control unit, selecting switch, programmable delay unit, secondary noise source and the amplitude control unit composition in path
Path number is consistent, and all there are one programmable delay unit, retardation is controlled each paths by main control unit；Master after branch
Noise source is respectively there are one independent amplitude control unit, for adjusting the amplitude of useful signal.
Independent and uncorrelated between secondary noise source under compressed air beep pattern, the amplitude of each noise source independently may be used
Control, the noise of each paths output are made of main noise source and time noise source superposition, and the noise of synthesis is single by amplitude control
Member is sent to the sensor or vibration stimulus source of verified device, and sensor is connected with sound wave temperature measuring equipment；Vibration stimulus source drives
Dynamic sensor generates vibration.
When verified device is provided with loud speaker exciting signal source, input unit uses the electricity being made of analog acquisition unit
Sounding input unit is caused, which is electroluminescent beep pattern.
Under electroluminescent beep pattern, loud speaker exciting signal source is connected with the input terminal of analog acquisition unit, and main control unit is adopted
Collection analog acquisition unit is connected and judges whether the path works, and when exciting signal source works, respective path sends out thermometric use
Sound wave.
Under electroluminescent beep pattern, analog acquisition unit is at least set according to the loud speaker exciting signal source number of verified device
A paths are equipped with, number and main control unit, selecting switch, programmable delay unit, secondary noise source and the amplitude in path control
The path number that unit is formed is consistent, and all there are one programmable delay units for each paths, and main control unit is to the letter after delay
Number into line amplitude control, simulate scene attenuation or transducer range overflow.
Under electroluminescent beep pattern, the number of secondary noise source is consistent with loud speaker exciting signal source number, each paths
All there are one time noise source, secondary noise source amplitude is controlled by amplitude control unit, and the Signal averaging in all paths synthesizes a quilt
The signal that polluted, for simulating the soot blowing noise of the background noise of boiler combustion or boiler attendance.
Under electroluminescent beep pattern, the signal after synthesis is again introduced into amplitude control unit, is directly sent to sound wave temperature measuring equipment
Sensor either vibration stimulus source, sensor is connected with sound wave temperature measuring equipment；Vibration stimulus source driving sensor generation is shaken
It is dynamic.
Embodiment two：
For the sound wave temperature measuring equipment of compressed air pattern, sounding is by solenoid valve control.When the electromagnetism in certain path
Valve opens the then path sounding.Solenoid valve is opened in turn according to certain rule, and each solenoid valve corresponds to different sound waves and passes
Path is broadcast, such as Fig. 4 is the solenoid valve opening in a certain path, is correspondingly arranged on six paths.The following solution of compressed air pattern
Certainly scheme, shown in Fig. 6.
This calibration equipment is containing there are one main noise sources；Main noise source can be segmented into n road according to the number of sensor
Diameter, per all there are one programmable delay units all the way.Retardation is controlled by main control unit.There are one main noise source after branch is each
Independent signal amplitude control unit, for adjusting the size of output signal；This calibration equipment contains independent incoherent of n
Secondary noise source；The amplitude of each noise source is also individually controllable；The noise of each paths output by main noise source and time
Noise source, which is added, to be formed；Composite noise after being added is sent to the sensing of vibration exciter or temperature measuring equipment by amplitude control unit
The input terminal of device.There are one man-machine interface, displays, preset retardation, the amplitude information of every paths etc. for this calibration equipment.This
Calibration equipment detects solenoid valve state first, when the electromagnetism valve events for finding certain path, you can output corresponds to each of the path
The composite signal of the required correspondence temperature of sensor.
Embodiment three：
For the sound wave temperature measuring equipment of electroluminescent beep pattern, sounding is that electric signal drives a loud speaker.Usually raise one's voice
Device does not need to driving sounding, its drive signal is equal to zero at this time.Equally, each loud speaker is also according to certain regular sounding.
The following solution of electroluminescent beep pattern, shown in Fig. 7.
This calibration equipment contains the electric signal for there are one analog acquisition unit, acquiring drive the speaker；It is collected each to raise
Sound device electric signal, all with there are one programmable delay units.Retardation is controlled by control unit.Each one, road postpones signal source is solely
Vertical signal amplitude control unit, for adjusting the size of output noise；This calibration equipment contains n independent incoherent times
Noise source；Each time noise source amplitude is also individually controllable；Per the noise exported all the way by postpones signal source and time noise source
It is added and forms；Composite signal after being added is sent to the input of the sensor of vibration exciter or temperature measuring equipment by amplitude control
End.There are one man-machine interface, displays, preset retardation, the amplitude information of every paths etc. for this calibration equipment.This calibration equipment
Analog quantity size is detected first, when finding that there is driving voltage in certain path, you can each sensor institute in the corresponding path of output
The composite signal of correspondence temperature needed.
Example IV：
Solenoid valve or loud speaker exciting signal source 1, stove between the two are respectively laid in 2 both sides of burner hearth of boiler in Fig. 1
Thorax 2 is apart from known.In Fig. 2, by the collected sound wave of sensor propagation delay schematic diagram in air, can significantly it find out
The solenoid valve or 1 amplitude of loud speaker exciting signal source of the left and right sides have the delay of difference time t.In Fig. 3 and Fig. 4, it is assumed that stove
Thorax 2 is provided with two groups of solenoid valves or loud speaker exciting signal source 1 to be rectangular in each length of side, when one of solenoid valve or
When person's loud speaker exciting signal source 1 emits signal, solenoid valve or loud speaker exciting signal source 1 in addition will be opened as receiving terminal
Begin to receive signal.
Embodiment five：
The present invention relates to the calibration equipments of boiler sound wave temperature measuring equipment, belong to acoustic method air themperature collimation technique field.This
Invention solves the problems, such as exfactory inspection and the field-checking of the boiler hearth temperature measuring apparatus based on Principles of Acoustics.The present invention is main
To include analog acquisition, on off state acquisition, selecting switch, programmable delay, the control of major loop amplitude, local noise source, attached
Plus noise source, the control of minor loop amplitude, noise mixing output etc..For compressed air sounding by calibration equipment, present invention acquisition
Its electromagnetic valve work state, local noise source is as major loop signal.For electroluminescent sounding by calibration equipment, the present invention will acquisition
The acoustical generator arrived encourages analog signal as major loop signal.Major loop signal is delayed and amplitude control after with additional noise source
Mixing is sent to by the sensor input of calibration equipment by its acquisition.By electronic manner construct boiler temperature field, and then
Its interior background noise is simulated, for assessing by the technical performance of calibration equipment.
Certainly, the above is only presently preferred embodiments of the present invention, it is impossible to be construed as limiting the implementation to the present invention
Example range.The present invention is also not limited to the example above, and those skilled in the art are in the essential scope of the present invention
Interior made all the changes and improvements etc. should all be belonged in the patent covering scope of the present invention.
Claims (10)
1. a kind of calibration equipment of boiler sound wave temperature measuring equipment, it is characterised in that：It is opened including input unit, main control unit, selection
Pass, programmable delay unit, secondary noise source and amplitude control unit, input unit are connected by selecting switch with main control unit,
Main control unit connects programmable delay unit, secondary noise source, amplitude control unit and man-machine interface respectively；Input unit and amplitude
Control unit connects the both ends of verified device respectively；By input unit, main control unit, selecting switch, programmable delay unit,
The path that secondary noise source and amplitude control unit are formed is at least provided with one.
2. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 1, it is characterised in that：When verified device is set
When being equipped with the solenoid valve of control compressed air break-make, input unit uses what is be made of main noise source and on off state collecting unit
Compressed air sounding input unit, the pattern are compressed air beep pattern.
3. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 2, it is characterised in that：Compressed air sounding mould
Under formula, the coil of solenoid valve is connected on off state collecting unit, the state letter of main control unit acquisition on off state collecting unit
It ceases and judges whether the path works, when the coil working of solenoid valve, respective path sends out the sound wave of thermometric.
4. the calibration equipment of the boiler sound wave temperature measuring equipment according to Claims 2 or 3, it is characterised in that：Compressed air is sent out
Under sound pattern, main noise source is according to the number of probes of verified device at least provided with a paths, the number in path and master
It is consistent with the path number that amplitude control unit is formed to control unit, selecting switch, programmable delay unit, secondary noise source, it is each
All there are one programmable delay unit, retardation is controlled paths by main control unit；Respectively there are one solely for main noise source after branch
Vertical amplitude control unit, for adjusting the amplitude of useful signal.
5. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 4, it is characterised in that：Compressed air sounding mould
Independent and uncorrelated between secondary noise source under formula, the amplitude of each noise source is individually controllable, the noise of each paths output
It is made of main noise source and time noise source superposition, the noise of synthesis is sent to the sensor of verified device by amplitude control unit
Or vibration stimulus source, sensor are connected with sound wave temperature measuring equipment；Vibration stimulus source driving sensor generates vibration.
6. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 1, it is characterised in that：When verified device is set
When being equipped with loud speaker exciting signal source, input unit uses the electroluminescent sounding input unit being made of analog acquisition unit, the mould
Formula is electroluminescent beep pattern.
7. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 6, it is characterised in that：Electroluminescent beep pattern
Under, loud speaker exciting signal source is connected with the input terminal of analog acquisition unit, and main control unit is connected and sentences with analog acquisition unit
Whether the disconnected path works, and when exciting signal source works, respective path sends out the sound wave of thermometric.
8. the calibration equipment of the boiler sound wave temperature measuring equipment described according to claim 6 or 7, it is characterised in that：Electroluminescent sounding mould
Under formula, analog acquisition unit is according to the loud speaker exciting signal source number of verified device at least provided with a paths, path
Number and main control unit, the path number that forms of selecting switch, programmable delay unit, secondary noise source and amplitude control unit
Unanimously, for each paths all there are one programmable delay unit, amplitude control unit controls the signal after delay into line amplitude,
The attenuation of simulation scene or transducer range overflow.
9. the calibration equipment of the boiler sound wave temperature measuring equipment described according to claim 6 or 7, it is characterised in that：Electroluminescent sounding mould
Under formula, the number of secondary noise source is consistent with loud speaker exciting signal source number, and each paths are secondary all there are one time noise source
Noise source amplitude is controlled by amplitude control unit, and the Signal averaging in all paths synthesizes a signal being contaminated, for mould
Intend the background noise of boiler combustion or the soot blowing noise of boiler attendance.
10. the calibration equipment of boiler sound wave temperature measuring equipment according to claim 9, it is characterised in that：Electroluminescent beep pattern
Under, the signal after synthesis is again introduced into amplitude control unit, and the sensor either vibration for being directly sent to sound wave temperature measuring equipment swashs
Source is encouraged, sensor is connected with sound wave temperature measuring equipment；Vibration stimulus source driving sensor generates vibration.
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