CN208187912U - The fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow - Google Patents
The fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow Download PDFInfo
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- CN208187912U CN208187912U CN201820127415.9U CN201820127415U CN208187912U CN 208187912 U CN208187912 U CN 208187912U CN 201820127415 U CN201820127415 U CN 201820127415U CN 208187912 U CN208187912 U CN 208187912U
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- amplifier
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- optical probe
- concentration
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Abstract
The utility model provides the fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow comprising fibre-optical probe ontology, the laser diode for emitting light source, photoelectric conversion module and host computer；The fibre-optical probe ontology includes transmitting terminal, the receiving end for receiving optical signal and the reflection end for receiving transmitting light source；Transmitting terminal is connect by launching fiber beam with receiving end；Receiving end is connect by reception optical fiber beam with reflection end；Receiving end is connect with photoelectric conversion module；Photoelectric conversion module is connect with host computer.Suitable for broader grain graininess range, flexible operation, the advantages such as sensitivity height.
Description
Technical field
The utility model belongs to detecting instrument, and in particular to particle speed and the fibre-optical probe of concentration are surveyed in a kind of multiphase flow
Measure instrument.
Background technique
So far, gas solid, liquid is consolidated, the researchers of biphase gas and liquid flow propose particle in many measurement Dual-Phrase Distributions of Gas olid
The method of local flow rate, in recent years academia's fluidized bed research commonly used by measurement particle speed method be laser doppler survey
Fast technology and high-speed image analytic approach, optical fiber particle speed probe measurement, striking momentum method, isokinetic sampling's method etc.,
The laser beam of Laser Doppler Velocimeter is easy the blocking by particle, and Laser Doppler Velocimeter cannot be used for surveying
The movement velocity of larger particles is measured, and the device systems are complicated, expensive, technical requirements are high when use；High-speed image point
Analysis method will obtain correct particle velocity, need to carry out interminable image analysis by computer, data processing complex takes
When, it cannot achieve real-time data acquisition, simultaneously because the design of existing probe, may be only available for of fluidized bed riser wall surface
Grain tachometric survey, and requirement of this method to illumination is relatively high needs using suitable tracer grain, simultaneously because camera shooting
The precision of device limits, and small to size, the high particle of movement velocity, High-speed Photography Technology is with regard to helpless；Isokinetic sampling's method is only
Have and just have higher precision in the flow rate and larger speed of particle, stream field has interference, and measurement accuracy is not high, and operation is more
Complexity, it is few using chance.
Summary of the invention
The purpose of the utility model is to provide the fibre-optical probe measuring instruments of particle speed in a kind of multiphase flow and concentration.
The utility model uses following technical scheme: particle speed and the fibre-optical probe of concentration measure in a kind of multiphase flow
Instrument comprising fibre-optical probe ontology, the laser diode for emitting light source, photoelectric conversion module and host computer；The optical fiber
Probe body includes transmitting terminal, the receiving end for receiving optical signal and the reflection end for receiving transmitting light source；Transmitting terminal is logical
Launching fiber beam is crossed to connect with receiving end；Receiving end is connect by reception optical fiber beam with reflection end；Receiving end and photoelectric conversion mould
Block connection；Photoelectric conversion module is connect with host computer.
In an embodiment of the utility model, photoelectric conversion module includes n photoelectric converter；The laser diode hair
It penetrates light source and is transmitted to transmitting terminal, spontaneous emission end emits a branch of launching fiber beam and is divided into n beam to receiving end, is evenly distributed on n beam and connects
It receives in fiber optic bundle and is transmitted to fibre-optical probe；The transmitting light that fibre-optical probe issues passes through the reflection of reflection end front end particle, reflected light
Receiving end is transmitted to by n beam reception optical fiber beam, then is transmitted to corresponding photoelectric converter；N is the natural number not less than 2.
In an embodiment of the utility model, the photoelectric converter is silicon photocell.
It in an embodiment of the utility model, further include signal amplifier, A/D converter；The signal amplifier input
It exports and connects with photoelectric conversion module；The signal amplifier output is connected through shielding line and A/D converter input；The A/D
Converter exports host computer connection.
In an embodiment of the utility model, the A/D converter is high-frequency data capture card.
In an embodiment of the utility model, the amplification coefficient of signal amplifier is adjustable.
Further, the signal amplifier includes the first amplifier, the second amplifier, the first to the 7th resistance, first
Capacitor, diode and the second capacitor；Two output ends of photoelectric conversion module connect the positive-negative input end of the first amplifier respectively；The
One resistance one terminates the first amplifier positive input terminal, another termination second resistance one end；Second resistance other end ground connection；Third electricity
The negative input end of one the first amplifier of termination of resistance；The output of the first amplifier of another termination of 3rd resistor；First capacitor with
3rd resistor is in parallel；4th resistance one terminates the output of the first amplifier；4th resistance the second amplifier of another termination is negative
Input terminal；5th resistance one terminates the second amplifier negative input end, the output of the second amplifier of another termination；Second capacitor one termination
5th resistance one end, another termination diode anode of the second capacitor；Diode cathode connects the 5th resistance other end；Second amplifier
Positive input terminates the 6th resistance one end；6th resistance other end ground connection；Second amplifier is exported through the 7th resistance and A/D converter
Connection；5th resistance is adjustable resistance.
Compared with prior art, method of the utility model based on particle speed and concentration in fibre-optical probe measurement multiphase flow
Compared to conventional method, multi-point transmitting laser, multiple spot receives reflected light sonde configuration, so that it is suitable for broader particle
Spend range, flexible operation, the advantages such as sensitivity height.Light source used by fibre-optical probe measuring instrument is on-dispersive light source, representative value
Wavelength is the feux rouges of 650nm, avoids the scattering of light, low in energy consumption.In addition, photomultiplier tube is replaced using silicon photocell, so that
Apparatus structure becomes simpler, cheap.
Detailed description of the invention
Fig. 1 is the primary structure figure of the utility model.
Fig. 2 is the fibre-optical probe schematic diagram of an embodiment of the present invention.
Fig. 3 is the left side view of Fig. 2.
Fig. 4 is the right side view of Fig. 2.
Fig. 5 is the fibre-optical probe schematic diagram of another embodiment of the utility model.
Fig. 6 is the left side view of Fig. 5.
Fig. 7 is the right side view of Fig. 5.
Fig. 8 is the circuit diagram of the signal amplifier of an embodiment of the present invention.
Specific embodiment
Explanation is further explained to the utility model in the following with reference to the drawings and specific embodiments.
The utility model provides the fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow comprising optical fiber is visited
Head ontology, the laser diode for emitting light source, photoelectric conversion module and host computer；The fibre-optical probe ontology includes being used for
Receive transmitting terminal, the receiving end for receiving optical signal and the reflection end of transmitting light source；Transmitting terminal passes through launching fiber beam and connects
Receiving end connection；Receiving end is connect by reception optical fiber beam with reflection end；Receiving end is connect with photoelectric conversion module；Photoelectric conversion mould
Block is connect with host computer.Primary structure schematic illustration is referring to Fig. 1.
The utility model discloses particle speeds in a kind of multiphase flow and the fibre-optical probe measuring instrument of concentration to include at least light
Fine probe body, laser diode, photoelectric converter, signal amplifier, A/D converter, computer (host computer)；Fibre-optical probe
By a branch of launching fiber beam and at least two beams (or n beam) reception optical fiber Shu Zucheng, extend per a branch of reception optical fiber beam from receiving end
To transmitting terminal, transmitting terminal launching fiber beam is divided into n beam to reflection end, and is uniformly distributed in reception optical fiber beam；Laser diode
The laser of transmitting is emitted by the reflection end that the launching fiber beam of fibre-optical probe transmitting terminal is transferred to probe, and laser passes through reflection end
The reflection of front end particle, reflected light are transmitted to receiving end by reception optical fiber beam, then are transmitted on corresponding photoelectric converter,
Signal after photoelectric conversion amplifies by signal amplifier, is input to A/D converter by shielding line connection, A/D converter is logical
It crosses USB interface data line and is connected to computer.The speed and concentration of the utility model moving particle suitable for multiphase streaming system
Measurement.
In an embodiment of the utility model, photoelectric conversion module includes n photoelectric converter；The laser diode hair
It penetrates light source and is transmitted to transmitting terminal, spontaneous emission end emits a branch of launching fiber beam and is divided into n beam to receiving end, is evenly distributed on n beam and connects
It receives in fiber optic bundle and is transmitted to fibre-optical probe；The transmitting light that fibre-optical probe issues passes through the reflection of reflection end front end particle, reflected light
Receiving end is transmitted to by n beam reception optical fiber beam, then is transmitted to corresponding photoelectric converter；N is the natural number not less than 2.
The structural schematic diagram of fibre-optical probe referring to fig. 2-7.
In an embodiment of the utility model, the photoelectric converter is silicon photocell.
It in an embodiment of the utility model, further include signal amplifier, A/D converter；The signal amplifier input
It exports and connects with photoelectric converter；The signal amplifier output is connected through shielding line and A/D converter input；The A/D turns
Parallel operation exports host computer connection.
In an embodiment of the utility model, the A/D converter is high-frequency data capture card.
In an embodiment of the utility model, the amplification coefficient of signal amplifier is adjustable.An embodiment of the present invention
The circuit diagram of signal amplifier is referring to fig. 4.The signal amplifier includes the first amplifier A1, the second amplifier A2, the
One to the 7th resistance, first capacitor C1 and the second capacitor C2；Two output ends of photoelectric conversion module connect the first amplifier respectively
Positive-negative input end；First resistor R1 mono- terminates the first amplifier A1 positive input terminal, the one end another termination second resistance R2；Second
Resistance R2 other end ground connection；3rd resistor R3 mono- terminates the negative input end of the first amplifier A1；The 3rd resistor R3 other end
Connect the output of the first amplifier A1；First capacitor C1 is in parallel with 3rd resistor R3；4th resistance R4 mono- termination, first amplification
The output of device；4th resistance R4 the second amplifier A2 negative input end of another termination；5th resistance R5 mono- terminates the second amplifier A2
Negative input end, the second amplifier A2 of another termination output；Second capacitor C2 mono- terminates the 5th one end resistance R5, and the second capacitor C2 is another
One terminating diode D1 anode；Diode D1 cathode connects the 5th resistance R5 other end；Second amplifier A2 positive input termination the 6th
The one end resistance R6；6th resistance R6 other end ground connection；Second amplifier A2 output is connect through the 7th resistance R7 with A/D converter；
The 5th resistance R5 is adjustable resistance.Wherein amplification coefficient can be adjusted by adjustable resistance.
In an embodiment of the utility model, laser diode (5) transmitting light source is transmitted to transmitting terminal, spontaneous emission end (2)
Emit a branch of launching fiber beam and be divided into 2 beams to receiving end (3), is evenly distributed in 2 beam reception optical fiber beams, transmitting light is by reflection
The reflection of (4) front end particle is held, reflected light is transmitted to receiving end (3) by 2 beam reception optical fiber beams, then is transmitted to corresponding photoelectricity
In converter (6a, 6b), signal accesses the input terminal of signal amplifier (7), through signal amplifier (7) (wherein amplification coefficient
Can be adjusted by adjustable resistance) amplification, signal output end is by shielding line connection A/D converter (8) (herein using high frequency
Data collecting card), the signal of output is acquired, stores, is output to computer (9).Before measurement, fibre-optical probe needs to carry out
Calibration.Fibre-optical probe measuring instrument can carry out the measurement of granule density and speed simultaneously: when measurement concentration, export into computer
Two-way voltage signal be granule density voltage signal；When measuring speed, the two-way particle speed voltage into computer is exported
Signal has certain delay in time, by the distance L and time difference τ of reception optical fiber interfascicular, the average movement velocity ν of particle=
L/τ.Wherein light source is on-dispersive light source, and representative value wavelength is the feux rouges of 650nm, avoids the scattering of light, low in energy consumption.In addition,
Photomultiplier tube is replaced using silicon photocell, so that apparatus structure becomes simpler, it is cheap.The structural representation of fibre-optical probe
Referring to fig. 2-4, wherein 10 be launching fiber beam, 11-1,11-2 are respectively reception optical fiber beam #1, #2,12-1,12-2 difference to figure
For fibre-optical probe #1, #2.10' is launching fiber, comes from launching fiber beam.11' is reception optical fiber, comes from reception optical fiber beam #1.
In another embodiment of the utility model, laser diode (5) transmitting light source is transmitted to transmitting terminal, spontaneous emission end
(2) emit a branch of launching fiber beam and be divided into 4 beams to receiving end (3), be evenly distributed in 4 beam reception optical fiber beams, transmitting light passes through
The particle of reflection end (4) (probe orientation can need to design according to measurement) front end different directions reflects, and reflected light is received by 4 beams
Fiber optic bundle is connected to receiving end (3), then is transmitted in corresponding photoelectric converter, and signal accesses the defeated of signal amplifier (7)
Enter end, amplify through signal amplifier (7) (wherein amplification factor can be adjusted by adjustable resistance), signal output end connects A/D and turns
Parallel operation (8) (herein using high-frequency data capture card), is acquired the signal of output, and storage is output to computer
(9).Fibre-optical probe structural schematic diagram is referring to Fig. 5-7.Before measurement, fibre-optical probe is demarcated.Fibre-optical probe measuring instrument pair
The measurement of granule density and speed can carry out simultaneously: when measurement concentration, the 4 road voltage signals exported into computer are that particle is dense
Spend voltage signal；When measuring speed, the 4 road particle speed voltage signals exported into computer have in time two-by-two centainly to be prolonged
Late, pass through the distance L (L of reception optical fiber interfascicular two-by-two1, L2…L6) and time difference τ (τ1, τ2...τ6), the mean motion speed of particle
Spend ν=L/ τ.
When fibre-optical probe measuring instrument measures granule density, need first to the granule density voltage value V of optical measuring system into
Row correction, the sample frequency of experiment are 100kHz, filter constant 16kHz, sampled data output 131072, and the sampling time is
1.3107s, packet data are 128 × 1024, i.e., two-way sampled signal are divided into 128 groups, every group of data volume is 1024.Each
Radial measuring point repeated sampling 5 times, then total sampling number is 128 × 5=640, and real data sample size when relevant calculation is 95
Change between~447.Two section gauge bed pressure drops away from optical fiber measurement section each 30mm up and down are selected, according to bed pressure drop
It can get the average particle concentration C in optical fiber measurement section.5 measuring points are taken along optical fiber measurement cross-section radial, each measuring point samples 5 times
It is averaged.Assuming that the non-linear relation between bed endoparticle concentration and fibre-optical probe output voltage signal can be indicated with formula (1)
Ci=aVi 3+bVi 2+cVi+d (1)
Then section average particle concentration are as follows:
Change bed section average particle concentration by changing the method for riser operation gas velocity and particle intensity of circulation
And local particle concentration voltage value, and returned to obtain the relationship between granule density and the voltage value of optical fiber output are as follows:
C=21.859V3-3.126V2+38.489V (3)
It is the preferred embodiment of the utility model above, it is all to change according to made by technical solutions of the utility model, it is produced
Function without departing from technical solutions of the utility model range when, belong to the protection scope of the utility model.
Claims (7)
1. the fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow, it is characterised in that: including fibre-optical probe ontology,
For emitting the laser diode, photoelectric conversion module and host computer of light source；
The fibre-optical probe ontology includes transmitting terminal, the receiving end for receiving optical signal and the reflection for receiving transmitting light source
End；Transmitting terminal is connect by launching fiber beam with receiving end；Receiving end is connect by reception optical fiber beam with reflection end；Receiving end with
Photoelectric conversion module connection；Photoelectric conversion module is connect with host computer.
2. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 1, it is characterised in that: light
Electric conversion module includes n photoelectric converter；The laser diode transmitting light source is transmitted to transmitting terminal, spontaneous emission end transmitting one
Beam launching fiber beam is divided into n beam to receiving end, is evenly distributed on n beam reception optical fiber beam；Emit light and passes through reflection end front end particle
Reflection, reflected light is transmitted to receiving end by n beam reception optical fiber beam, then is transmitted to corresponding photoelectric converter；N is not less than 2
Natural number.
3. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 2, it is characterised in that: institute
Stating photoelectric converter is silicon photocell.
4. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 1, it is characterised in that: also
Including signal amplifier, A/D converter；The signal amplifier input is connected with photoelectric conversion module output；The signal is put
Big device output is connected through shielding line and A/D converter input；The A/D converter output is connect with host computer.
5. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 4, it is characterised in that: institute
Stating A/D converter is high-frequency data capture card.
6. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 4, it is characterised in that: letter
The amplification factor of number amplifier is adjustable.
7. the fibre-optical probe measuring instrument of particle speed and concentration in multiphase flow according to claim 6, it is characterised in that: institute
Stating signal amplifier includes the first amplifier, the second amplifier, the first to the 7th resistance, first capacitor, diode and the second electricity
Hold；Two output ends of photoelectric conversion module connect the positive-negative input end of the first amplifier respectively；The termination of first resistor one first is put
Big device positive input terminal, another termination second resistance one end；Second resistance other end ground connection；3rd resistor one terminates the first amplifier
Negative input end；The output of the first amplifier of another termination of 3rd resistor；First capacitor is in parallel with 3rd resistor；Described
Four resistance one terminate the output of the first amplifier；4th resistance the second amplifier negative input end of another termination；5th resistance one end
Connect the second amplifier negative input end, the output of the second amplifier of another termination；Second capacitor one terminates the 5th resistance one end, the second electricity
Hold another termination diode anode；Diode cathode connects the 5th resistance other end；Second amplifier positive input terminates the 6th resistance
One end；6th resistance other end ground connection；The output of second amplifier is connect through the 7th resistance with A/D converter；5th resistance
For adjustable resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820127415.9U CN208187912U (en) | 2018-01-25 | 2018-01-25 | The fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow |
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| CN201820127415.9U CN208187912U (en) | 2018-01-25 | 2018-01-25 | The fibre-optical probe measuring instrument of particle speed and concentration in a kind of multiphase flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879301A (en) * | 2019-10-11 | 2020-03-13 | 中国航发沈阳发动机研究所 | Method and system for simultaneously measuring two-dimensional distribution of liquid concentration and liquid movement |
-
2018
- 2018-01-25 CN CN201820127415.9U patent/CN208187912U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879301A (en) * | 2019-10-11 | 2020-03-13 | 中国航发沈阳发动机研究所 | Method and system for simultaneously measuring two-dimensional distribution of liquid concentration and liquid movement |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20220125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |