CN109030296A - A kind of phosphor particle tracer multi-point measurement system and method - Google Patents
A kind of phosphor particle tracer multi-point measurement system and method Download PDFInfo
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- CN109030296A CN109030296A CN201810900146.XA CN201810900146A CN109030296A CN 109030296 A CN109030296 A CN 109030296A CN 201810900146 A CN201810900146 A CN 201810900146A CN 109030296 A CN109030296 A CN 109030296A
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- 239000002245 particle Substances 0.000 title claims abstract description 62
- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 31
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 230000005284 excitation Effects 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000000013 phosphorescence detection Methods 0.000 claims abstract description 11
- 230000035945 sensitivity Effects 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 241001025261 Neoraja caerulea Species 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 7
- 230000005514 two-phase flow Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010882 bottom ash Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000917 particle-image velocimetry Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of phosphor particle tracer method multi-point measurement system and measurement methods, measuring system includes impulses injection device, flash ignition device, phosphorescence detection device, data acquisition and control device, and impulses injection device includes injection spray gun and solenoid valve, gas cylinder.Flash ignition device includes excitation ring and flash lamp tube.Excitation ring and flash lamp tube are arranged in the downstream of injection spray gun and close to injection spray guns.Phosphorescence detection device includes several light-sensitive elements being arranged in cross section same in test tube different location.Data acquisition is connect with solenoid valve, flash lamp tube and light-sensitive element respectively with control device.Phosphorescent particle is injected into from injection spray gun to be excited into the phosphorescence tracer with twilight sunset by flash ignition device in test tube by way of material bullet, is then detected by phosphorescence detection device and is obtained afterglow intensity signal, calculates amendment concentration.The present invention can effectively realize synchronous multimetering in Dual-Phrase Distribution of Gas olid flow field, relatively accurately reflect the integrality in flow field.
Description
Technical field
The present invention relates to the measurements of Gas-solid Two-phase Flow (including circulating fluid bed reactor), and in particular, to phosphorescence
The optimization design of grain tracer multimetering method and circulating fluidized bed boiler.
Background technique
The two-phase mixtures dispersal behavior of gas-particle two-phase flow reactor has reacted the characteristic of bed endoparticle movement and distribution, has been
Understand the key of reactor inner transmission matter and heat-transfer mechanism.Therefore, dress is measured by high-precision, the Gas-solid Two-phase Flow of high reliability
The flowing informations such as concentration distribution, the dispersal behavior for obtaining flow field endoparticle online with method are set, are the new and effective sections of research and development
Energy two-phase reactor and the basis for optimizing its design of Structural Parameters.By taking circulating fluidized bed boiler as an example, circulating fluid bed reactor
Flowing in riser is a kind of typical Gas-solid Two-phase Flow, and with the enlargement of fluidized-bed combustion boiler, heating surface arrangement is asked
Topic, Secondary Air penetrability problem, cloth wind homogeneity question, more separator bring flow irregularity problems etc. are all therewith
Come.It solves these problems, it still will be by the optimization of fluidized-bed combustion boiler design, it is desirable to optimize boiler design, need to test survey
The residence time destribution of solid particle in flow field is measured, to examine or check the diffusion rate and other flow field states of solid particulate matter.
The main method of research gas-particle two-phase particles diffusion behavior at present is particle trace method.By being sprinkled into one in flow field
Quantitative tracer grain characterizes the flow behavior of local airflow with the flowing and dispersal behavior of tracer grain.Such as hot
Grain trace method, magnetic-particle trace method, radioactive grain trace method, phosphor particle tracer method etc. have all had researcher's use
It crosses, recently as the development of computer computation ability, the two phase flow developed in conjunction with optical image technology and image analysis technology
Particle Image Velocimetry is capable of handling complicated image, provides the flow regime of the instantaneous whole audience.All these measurement methods
It is all based on the assumed condition that tracer grain uniformly dispenses, but presently used particle dispenses device and is difficult under high-speed flow
Realize this point.
Different injection or activating system are needed using different tracer grains in experiment, also accordingly need different inspections
Survey or sampling system.According to influence of the tracer grain in injection, excitation, sampling, detection process to original flow field, such method
It is divided into intrusive and two class of non-intrusion type again.From experiment mechanism, tracer technique needs to meet: tracer injection
Instantaneity will be got well；Injection process, sampling process are as small as possible to the destruction in original flow field；Tracer grain is with original bed material close
It is close as far as possible on degree, partial size；Experimental procedure is simple as far as possible, and experimental period is short, it is easy to accomplish repeats to test, and cost is reasonable.
For other tracing methods, phosphorescence trace method has online, quick, highly sensitive detection easy to accomplish；
Without remnants in bed after experiment, it is easy to carry out repeating test；It is good to inject instantaneity, bed flow field is interfered small and of reasonable cost excellent
Point.
Summary of the invention
The object of the present invention is to provide one kind can effectively realize point/field excitation multimetering phosphor particle tracer multiple spot
Measuring system and method, for measuring the residence time destribution of particle phase in Gas-solid Two-phase Flow.
A kind of phosphor particle tracer multi-point measurement system, the system can be used in Dual-Phrase Distribution of Gas olid and wait for particle in test tube
Tracing detection, which is characterized in that the system comprises impulses injection device, flash ignition device, phosphorescence detection device, data to adopt
Collection and control device；The impulses injection device include one end protrude into in test tube injection spray gun and be connected to injection spray gun it is another
The gas cylinder of one end, the injection spray gun are provided with solenoid valve close to gas cylinder side；By Dual-Phrase Distribution of Gas olid direction of flow, the pulse
The upstream to test tube is arranged in the injection spray gun of injection device；The flash ignition device includes the excitation ring protruded into in test tube
With the flash lamp tube being connected on the excitation ring；The excitation ring is arranged in the downstream of the injection spray gun and close to the note
Enter spray gun setting；The phosphorescence detection device includes several light-sensitive elements, several described light-sensitive elements are arranged to test tube
Interior same cross section different location；The data acquisition connects with solenoid valve, flash lamp tube and light-sensitive element respectively with control device
It connects.
In above-mentioned technical proposal, the flash lamp tube selects laser light source, and in the flash lamp tube and the excitation ring
Junction flash lamp tube light source export setting one word mirror, make laser light source dissipate to form linear light source.
In above-mentioned technical proposal, the word mirror make laser light source dissipate 100 ° of the linear light source angle of divergence to be formed~
150°。
In above-mentioned technical proposal, the light blue ray laser of the laser light source preferably 2~8.
In above-mentioned technical proposal, the light-sensitive element selects photomultiplier tube.
In above-mentioned technical proposal, it is 120~140 μ A/lm, anode light that the photomultiplier tube, which selects cathode luminous sensitivity,
According to sensitivity in 700~800A/lm.
In above-mentioned technical proposal, ring and flash lamp tube is excited to be all made of the material of antistatic absorption.
A kind of phosphor particle tracer multimetering method, which comprises
Phosphorescent particle and bed material are mixed and made into material bullet；
Material bullet is installed in injection spray gun；
The excitation ring for injecting spray gun, flash ignition device and part flash lamp tube are extend into test tube upstream corresponding positions
It sets；
According to measuring point needs, corresponding photomultiplier tube is arranged into the plane to be measured to test tube；
Log-on data acquisition and control device start solenoid valve with control device by data acquisition, make in material bullet
Phosphorescent particle and bed material mixture are quickly injected to in test tube under the action of gas in gas cylinder, and to the gas-solid two in test tube
Mutually stream mixing；
Start the laser light source of flash lamp tube with control device by data acquisition, laser light source emits to form linear light source simultaneously
Laser light source circle is formed in excitation ring, is made as the phosphorescent particle flowed to Dual-Phrase Distribution of Gas olid in test tube is by laser light source
It is excited when circle and issues twilight sunset as phosphorescence tracer；
Flow phosphorescence tracer in test tube with Dual-Phrase Distribution of Gas olid, reach light-sensitive element where plane when, phosphorus
The twilight sunset of light tracer is detected by light-sensitive element, and light-sensitive element feeds back detectable signal to data acquisition and control device, from
And phosphorescence tracer afterglow intensity signal is obtained, and obtain phosphorescence tracer concentration curve by corrected Calculation.
It is 0.5%~2% that phosphorescent particle amount, which accounts for the ratio of total bed material amount, in the above method, in the material bullet.
The above method further includes that phosphorescence tracer afterglow intensity signal correction calculates, and the corrected Calculation includes:
The curve of twilight sunset Natural Attenuation at any time after obtaining phosphorescent particle excitation, according to attenuation curve I=Ct-BIt obtains
The numerical value of phosphorescent particle decaying spy B；
Using same concentrations tracer grain different moments afterglow intensityCorrection formula, selected reference
Moment t1The amendment numerical value that other moment can be obtained, eliminates the influence of Natural Attenuation.
The present invention has the advantages that following prominent and effect: 1) can effectively realize that synchronous multiple spot is surveyed in Dual-Phrase Distribution of Gas olid flow field
Amount relatively accurately reflects the integrality in flow field；2) injection pipette tips can be reduced and detect the electrostatic that ring generates in flow field, subtracted
Less granular absorption guarantees the accuracy of experiment；3) it can guarantee that the phosphorescent particle amount sprayed into every time is substantially the same, and pass through
The injection rate for the control phosphorescent particle that the ratio of phosphorescent particle and bed material can be convenient in control tracer material；4) control can be passed through
Gas pressure controls particle injection rate in storage cylinder processed, to control the interference that injection process generates original flow field.
Detailed description of the invention
Fig. 1 is a kind of circulating fluidized bed boiler bottom ash desulphurization system schematic diagram according to the present invention.
In figure: 1-impulses injection device；11-injection pipette tips；12-solenoid valves；13-gas cylinders；2-light flash excitations dress
It sets；21-excitation rings；22-flash lamp tubes；3-phosphorescence detection devices: 4-data collection and control devices；5-to test tube.
Specific embodiment
A specific embodiment of the invention and the course of work are further described with reference to the accompanying drawing.
The positional terms such as the upper, lower, left, right, front and rear in present specification be positional relationship based on the figure and
It establishes.Attached drawing is different, then corresponding positional relationship is also possible to change therewith, therefore cannot be interpreted as with this to protection model
The restriction enclosed.
The present invention provides a kind of phosphor particle tracer that can be used in the particle Tracing detection that Dual-Phrase Distribution of Gas olid waits in test tube 5
Multi-point measurement system and method.
As shown in Figure 1, a kind of phosphor particle tracer multi-point measurement system, including impulses injection device 1, flash ignition device
2, phosphorescence detection device 3, data acquisition and control device 4.Impulses injection device 1 includes that one end is protruded into the injection in test tube 5
Spray gun 11 and the gas cylinder 13 for being connected to injection 11 other end of spray gun inject and are provided with solenoid valve 12 between spray gun 11 and gas cylinder 13,
And it is arranged close to 13 side of gas cylinder.
By Dual-Phrase Distribution of Gas olid direction of flow, the upstream to test tube 5 is arranged in the injection spray gun 11 of impulses injection device 1.Such as
Embodiment shown in FIG. 1 is riser to test tube 5, and Dual-Phrase Distribution of Gas olid direction of flow is from top to bottom.
Flash ignition device 2 includes excitation ring 21 and flash lamp tube 22.Excitation ring 21 entirely protrudes into test tube 5, dodges
22 one end of light lamp tube is connected on excitation ring 21, therefore a part of flash lamp tube 22 is also in test tube 5.The setting of ring 21 is excited to exist
Inject the downstream of spray gun 11.In general, to which the hole for placing injection spray gun 11 and flash lamp tube 22 is offered on 5 tube wall of test tube respectively.
Excitation ring 21 and flash lamp tube 22 are all made of the material of antistatic absorption.
Flash lamp tube 22 is actually the excitation light source of phosphorescent particle, selects laser light source.Flash lamp tube 22 and excitation ring
21 22 light source of junction machine object flash lamp tube outlet, a word mirror is arranged here, laser light source is made to dissipate to form linear light source.One
Word mirror makes laser light source dissipate to be formed 100 °~150 ° of the linear light source angle of divergence.The light blue ray laser of laser light source preferably 2~8.
Meanwhile the use of ring 21 is excited, it is limited at excitation light source in the range of excitation ring 21.
The middle and lower reaches to test tube 5, including several light-sensitive elements are arranged in phosphorescence detection device 3, and light-sensitive element selects light
The component of high sensitivity.In the present invention, light-sensitive element selects photomultiplier tube.Photomultiplier tube selects cathode luminous sensitivity
It is 10~15 μ A/lm for 120~140 μ A/lm, cathode blue sensitivity, anode luminous sensitivity is in 700~800A/lm, anode
Blue sensitivity is 60~70A/lm, my 0.3~0.4nA of anode dark current.The setting of several light-sensitive elements is to same in test tube 5
One cross section different location, to obtain tracer grain in the distribution of plane where phosphorescence detection device.
Data acquisition is connect with solenoid valve 12, flash lamp tube 22 and light-sensitive element respectively with control device 4, to each component control
It makes and acquires, obtain signal data.
A kind of phosphor particle tracer multimetering method, including the preparation of phosphorescent particle material bullet, phosphorescent particle are injected and are swashed
Hair and phosphorescence afterglow detection.
Phosphorescent particle and bed material are mixed and made into material bullet；Material can be seated in a bit of stainless steel tube, formation
Expect bullet.It is 0.5%~2% that phosphorescent particle amount, which accounts for the ratio of total bed material amount, in material bullet.The preparation of material bullet so that spray into every time
Phosphorescent particle amount can be substantially the same.
Material bullet is installed in injection spray gun 11.
The excitation ring 21 for injecting spray gun 11, flash ignition device and 22 linkage section of flash lamp tube are extend into in test tube 5
Swim corresponding position.
According to measuring point needs, corresponding photomultiplier tube is arranged into the plane to be measured to test tube 5.
Log-on data acquisition and control device 4 start solenoid valve 12 with control device 4 by data acquisition, make material bullet
Interior phosphorescent particle and bed material mixture is quickly injected to in test tube 5 under the action of gas in gas cylinder 13, and in test tube 5
Dual-Phrase Distribution of Gas olid mixing.Gas pressure and speed are selected to reduce the disturbance for treating test tube flow field to the greatest extent as criterion.
Start the laser light source of flash lamp tube 22 with control device 4 by data acquisition, laser light source emits to form linear light
Source simultaneously forms laser light source circle in excitation ring 21, makes passing through with the phosphorescent particle flowed to Dual-Phrase Distribution of Gas olid in test tube 5
It is excited when laser light source circle and issues twilight sunset as phosphorescence tracer.Since phosphorescent particle is the ability after being excited by excitation light source
Twilight sunset is issued, tracer is become, so that 21 position of excitation ring of flash ignition device 2 is as showing truly
Track agent injection phase can flow steady undisturbed with Dual-Phrase Distribution of Gas olid after phosphorescent particle is injected by injection spray gun 11 in this way
It is just excited afterwards, reduces disturbance of the tracer to Dual-Phrase Distribution of Gas olid to be measured to greatest extent, so as to relatively true inspection
Measure Flow Field Distribution situation.In addition, the use of excitation ring 21, can both realize point excitation when exciting 21 diameter of ring smaller,
The laser point dynamite source state of flash lamp tube 22 can be made to become uniform field excitation, ensure that the multiple spot detection in downstream is effective
Property.
Flow phosphorescence tracer in test tube 5 with Dual-Phrase Distribution of Gas olid, reach light-sensitive element where plane when, phosphorus
The twilight sunset of light tracer is detected by light-sensitive element, and light-sensitive element feeds back detectable signal to data acquisition and control device 4, from
And phosphorescence tracer afterglow intensity signal is obtained, and obtain phosphorescence tracer concentration curve by corrected Calculation.
Phosphorescence tracer afterglow intensity signal correction calculates
The curve of twilight sunset Natural Attenuation at any time after obtaining phosphorescent particle excitation, according to attenuation curve I=Ct-BIt obtains
The numerical value of phosphorescent particle attenuation characteristic B；In the embodiments herein, B=1.35.
Using same concentrations tracer grain different moments afterglow intensityCorrection formula, selected reference
Moment t1The amendment numerical value that other moment can be obtained, eliminates the influence of Natural Attenuation.Utilize revised tracer grain concentration
Numerical value carries out weight to Dual-Phrase Distribution of Gas olid middle particle concentration distributed model in conjunction with the influence factors such as particles diffusion and particle stream swing
Structure.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of phosphor particle tracer multi-point measurement system, the system can be used in Dual-Phrase Distribution of Gas olid and wait in test tube (5)
Grain Tracing detection, which is characterized in that the system comprises impulses injection device (1), flash ignition device (2), phosphorescence detection dresses
Set (3), data acquire and control device (4)；The impulses injection device (1) includes that one end is protruded into the injection in test tube (5)
Spray gun (11) and the gas cylinder (13) for being connected to injection spray gun (11) other end, the injection spray gun (11) is close to gas cylinder (13) side
It is provided with solenoid valve (12)；By Dual-Phrase Distribution of Gas olid direction of flow, injection spray gun (11) setting of the impulses injection device (1) exists
Upstream to test tube (5)；The flash ignition device (2) includes protruding into the excitation ring (21) in test tube (5) and being connected to institute
State the flash lamp tube (22) in excitation ring (21)；Excitation ring (21) setting is in the downstream of injection spray gun (11)；It is described
Phosphorescence detection device (3) includes several light-sensitive elements, several light-sensitive elements setting is same transversal in test tube (5)
Face different location；The data acquisition connects with solenoid valve (12), flash lamp tube (22) and light-sensitive element respectively with control device (4)
It connects.
2. a kind of phosphor particle tracer multi-point measurement system according to claim 1, which is characterized in that the flash lamp tube
(22) laser light source is selected, and in the flash lamp tube (22) and the junction of excitation ring (21) in flash lamp tube (22) light
One word mirror of source outlet setting, makes laser light source dissipate to form linear light source.
3. a kind of phosphor particle tracer multi-point measurement system according to claim 2, which is characterized in that the word mirror makes
It is 100 °~150 ° that laser light source, which dissipates the linear light source angle of divergence to be formed,.
4. a kind of phosphor particle tracer multi-point measurement system according to claim 2, which is characterized in that the laser light source
It is preferred that 2~8 light blue ray lasers.
5. a kind of phosphor particle tracer multi-point measurement system according to claim 1, which is characterized in that the light-sensitive element
Select photomultiplier tube.
6. a kind of phosphor particle tracer multi-point measurement system according to claim 5, which is characterized in that the photomultiplier transit
It is 120~140 μ A/lm, anode luminous sensitivity in 700~800A/lm that pipe, which selects cathode luminous sensitivity,.
7. a kind of phosphor particle tracer multi-point measurement system according to claim 1, which is characterized in that excitation ring (21) and
Flash lamp tube (22) is all made of the material of antistatic absorption.
8. a kind of phosphor particle tracer multimetering method is surveyed using phosphor particle tracer multiple spot as described in claim 1
Amount system, which is characterized in that the described method includes:
Phosphorescent particle and bed material are mixed and made into material bullet；
Material bullet is installed in injection spray gun (11)；
The excitation ring (21) for injecting spray gun (11), flash ignition device and part flash lamp tube (22) are extend into test tube (5)
Upstream corresponding position；
According to measuring point needs, corresponding light-sensitive element is arranged into the plane to be measured to test tube (5)；
Log-on data acquisition and control device (4) start solenoid valve (12) with control device (4) by data acquisition, make material
Phosphorescent particle and bed material mixture in bullet are quickly injected to in test tube (5) under the action of gas cylinder (13) interior gas, with to
Dual-Phrase Distribution of Gas olid mixing in test tube (5)；
By the laser light source of data acquisition and control device (4) starting flash lamp tube (22), laser light source emits to form linear light
Source simultaneously forms laser light source circle in excitation ring (21), makes to exist with the phosphorescent particle to the interior Dual-Phrase Distribution of Gas olid flowing of test tube (5)
Twilight sunset is issued as phosphorescence tracer by being excited when laser light source circle；
Make phosphorescence tracer as Dual-Phrase Distribution of Gas olid is when to flow in test tube (5), reaching the plane where light-sensitive element, phosphorescence
The twilight sunset of tracer is detected by light-sensitive element, and light-sensitive element feeds back detectable signal to data acquisition and control device (4), from
And phosphorescence tracer afterglow intensity signal is obtained, and obtain phosphorescence tracer concentration curve by corrected Calculation.
9. a kind of phosphor particle tracer multimetering method according to claim 8, which is characterized in that in the material bullet
The ratio that phosphorescent particle amount accounts for total bed material amount is 0.5%~2%.
10. a kind of phosphor particle tracer multimetering method according to claim 8, which is characterized in that the method is also
It is calculated including phosphorescence tracer afterglow intensity signal correction, the corrected Calculation includes:
The curve of twilight sunset Natural Attenuation at any time after obtaining phosphorescent particle excitation, according to attenuation curve I=Ct-BObtain phosphorescence
The numerical value of particle attenuation characteristic B；
Using same concentrations tracer grain different moments afterglow intensityCorrection formula, selected reference moment
t1The amendment numerical value that other moment can be obtained, eliminates the influence of Natural Attenuation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596092A (en) * | 2020-05-18 | 2020-08-28 | 天津大学 | Laser-induced phosphorescence particle-based imaging speed measurement device and method |
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