CN110160741A - A kind of light scattering method droplet drift value test device - Google Patents
A kind of light scattering method droplet drift value test device Download PDFInfo
- Publication number
- CN110160741A CN110160741A CN201910515391.3A CN201910515391A CN110160741A CN 110160741 A CN110160741 A CN 110160741A CN 201910515391 A CN201910515391 A CN 201910515391A CN 110160741 A CN110160741 A CN 110160741A
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- apparatus subject
- drift value
- scattering method
- light scattering
- test device
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 230000002459 sustained effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 238000010998 test method Methods 0.000 abstract description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 238000000790 scattering method Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Abstract
The present invention discloses a kind of light scattering method droplet drift value test device, including bottom bracket, guide rail, the first apparatus subject, the second apparatus subject, photodetector, wherein, guide rail both ends are installed on the bottom bracket of two sides, first apparatus subject and the second apparatus subject are movably installed on guide rail, photodetector is two, is separately mounted on the first apparatus subject and the second apparatus subject, and sheet laser emitter is equipped in the first apparatus subject；The sheet laser emitter, which has, is sequentially arranged the optical path formed by laser, diaphragm, Bao Weier prism and non-spherical lens, wherein laser issues parallel hot spot, it is filtered by the aperture of diaphragm, slabbing diverging light spot is compressed using Bao Weier prism, finally diverging piece hot spot is collimated by non-spherical lens, becomes parallel light sheets.The present invention save time cost, test procedure simplification, protect tester and reliable test result be provided.
Description
Technical field
The present invention relates to a kind of droplet drift value measuring technology, specially a kind of light scattering method droplet drift value test dress
It sets.
Background technique
The drift weight testing method of droplet mainly carries out in wind-tunnel, (or similarly the same using polytetrafluoroethylene (PTFE) rope
Rope) carry out the test of droplet drift value, need test rope on collect drift droplet content, including flushing, weighing, divide
The complex steps such as analysis, the water absorption of rope is easily saturated in test process, needs effectively to control the total flow of droplet.Test droplet
Drift value is easily saturated
Several testers are needed to cooperate in wind-tunnel completion when test, due to being mostly the survey for testing pesticide droplet
Examination amount can damage the body of tester；His test process is more complicated, and link is more, human intervention factor
Very much, so test result mostly less stable, and testing cost is bigger.
Summary of the invention
Test rope generation saturated phenomenon is tested for droplet drift value in the prior art, human intervention factor is also much led
The deficiencies of causing test result unstable, the problem to be solved in the present invention is to provide one kind will not generate saturated phenomenon, human intervention
Seldom, test result stability and reproducible light scattering method droplet drift value test device.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of light scattering method droplet drift value test device of the present invention comprising bottom bracket, guide rail, the first instrument master
Body, the second apparatus subject, photodetector, wherein guide rail is installed on bottom bracket, the first apparatus subject and the second instrument master
Body is slidably mounted on guide rail, installs two photodetectors respectively on the first apparatus subject and the second apparatus subject, and first
Sheet laser emitter is equipped in apparatus subject.
The sheet laser emitter has to be sequentially arranged by laser, diaphragm, Bao Weier prism and non-spherical lens
The optical path of formation, wherein laser issues parallel hot spot, is filtered by the aperture of diaphragm, compresses using Bao Weier prism
Slabbing dissipates hot spot, finally collimates by non-spherical lens to diverging piece hot spot, becomes parallel light sheets.
Control unit is installed in the second apparatus subject.
The invention has the following beneficial effects and advantage:
1. the present invention tests droplet drift value using laser scattering method, sheet laser can produce, when droplet enters test
Region, sheet laser can generate the scattering light of similar water ripples, then be acquired by photodetector, and droplet is calculated
Drift value, save time cost, test procedure simplification, protect tester and reliable test result be provided.
2. due to the present invention using laser scattering method test droplet drift value, there is no test polytetrafluoroethylene (PTFE) rope because
The phenomenon that generation saturation excessive for flow, also avoids the later period manually to generation when testing the flushing of polytetrafluoroethylene (PTFE) rope, weighing
Error realizes that the overall process of droplet drift value is tested using electronic control, reproducible, test data and result reliability
Height thinks that the failure for testing some part leads to the unreliable of test result before avoiding.
3. the present invention tests droplet drift value using laser scattering method on the basis of original test droplet drift value, use
The transmission of overlength signal, tester can test in remote control, avoid personnel and (poisonous and harmful) contact of droplet from
And harm is generated to tester；The distance and measurement width that test drift value can also according to circumstances be adjusted, are arranged very flexible.
Detailed description of the invention
Fig. 1 is light scattering method droplet drift value schematic structural diagram of testing device of the present invention；
Fig. 2 is sheet laser emitter light channel structure schematic diagram in apparatus of the present invention.
Wherein, 1 is bottom bracket, and 2 be guide rail, and 3 be the first apparatus subject, and 4 be photodetector, and 5 be sheet laser,
501 be laser, and 502 be diaphragm, and 503 be Bao Weier prism, and 504 be non-spherical lens, and 6 be the second apparatus subject.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of light scattering method droplet drift value test device of the present invention, including bottom bracket 1, guide rail 2, the
One apparatus subject 3, the second apparatus subject 6, photodetector 4, wherein guide rail 2 is installed on bottom bracket 1, the first instrument master
Body 3 and the second apparatus subject 6 are installed in a movable manner on guide rail 2, and photodetector 4 is two, are separately mounted to the
On one apparatus subject 3 and the second apparatus subject 6, sheet laser emitter is equipped in the first apparatus subject 3.
As shown in Fig. 2, sheet laser emitter has by laser 501, diaphragm 502, Bao Weier prism 503 and aspheric
Face lens 504 are sequentially arranged the optical path to be formed, and wherein laser 501 issues parallel hot spot, are filtered by the aperture of diaphragm 2
Wave compresses slabbing diverging light spot using Bao Weier prism 3, finally carries out by non-spherical lens to diverging piece hot spot quasi-
Directly, become parallel light sheets.
The dimensional parameters of parallel light sheets, such as piece thickness, piece width parameter are by selection Bao Weier prism and aspheric
The optical parameters of face lens controls.The present invention realizes the sheet light source of 0.5 mm of thickness by sheet laser emitter, makes
Can be very intensive into the distance of light beam between droplet, repetition can be reduced to high concentration droplet in this way and enter light beam bring letter
Number error improves measurement accuracy.
First apparatus subject 3 and the second apparatus subject 6 are mounted on high-precision guide rail 2, and bottom bracket 1 is high-precision for fixing
Spend guide rail 2, apparatus subject 3 and 6 spacing of apparatus subject can manually adjust, benefit be adjustable droplet drift value laterally away from
From to adapt to different nozzle or site environment requirement.
First apparatus subject 3, the second apparatus subject 6 are oppositely arranged, and outside is shell structure, two photodetectors 4
It is installed on the sustained height position of shell structure opposite face top.
The sheet laser of sheet laser transmitter projects thickness 0.5mm inside first apparatus subject 3, in the first instrument master
(i.e. sheet light source front-rear position) installs two photodetectors 4 respectively on body 3 and the second apparatus subject 6, regardless of droplet is fallen in
On which position of sheet light source, scattered light intensity is that two photodetectors detect to obtain the summation of light intensity, can be protected in this way
The position that card detects to fall under light intensity magnitude and droplet light beam is unrelated, guarantees the accuracy of test result.
Adjustable distance is 10~2000mm between two photodetectors.
Guide rail 2 in the present invention is parallelly mounted between two bottom brackets 1 using double guide rails；First apparatus subject 3,
Second apparatus subject, 6 bottom end is equipped with multiple wheels, is fitted close with double guide rails.Close-fitting wheel will not roll easily with guide rail,
The not shift position vulnerable to External force interference.
Adjustable distance is 10~2000mm, the present embodiment 50mm between two photodetectors.
The control core of control unit of the present invention is installed in the second apparatus subject 6.Control unit is adopted parallel using FPGA
Mode set acquires two panels AD simultaneously, and FPGA is the operating mode of complete parallel, can really accomplish to acquire simultaneously, improve AD
Reading speed, single-chip microcontroller STM32 is then transferred to by dma mode, is not take up STM32 internal resource, while in STM32
Portion establishes the FIFO of two 64Kbyte, works alternatively, makes the data volume 64Kbyte exported every time, to ensure that acquisition number
According to timeliness.While improving AD acquisition speed and reading speed, if not promoting the transmission speed between STM32 and PC
Degree, even if acquire speed again fastly for the end PC without actual meaning, so in order to guarantee acquire data validity it is necessary
Promote the transmission speed between STM32 and PC.Data now are transmitted using USB2.0 (being 30 times of USB1.1) agreement, are increased
USB330PHY chip and high speed USB driving, the data volume that can be transmitted is bigger, adapts to higher acquisition speed, theoretical velocity can
Up to 48Mbyte, actual test speed >=38Mbyte fully meets requirement.
The course of work and principle of the present invention are as follows:
Droplet is sprayed by nozzle.When droplet enters between test section i.e. two photodetector 4, light scattering, light can be generated
The scattering light-receiving of 4 pairs of electric explorer generations, and electric signal is transformed by optical signal, it is passed after being transferred to signal acquisition transmission module
Enter computer and carry out data processing, obtains the drift value of droplet.
Sheet laser transmitter projects in first apparatus subject 3 go out the sheet laser of 0.5mm thickness, into the second instrument
The light of main body 6 is fallen into phenomena such as (a kind of device, there is no retroeflection after entering light beam), avoids influence of the reflected light to test.
Light scattering can be generated after drift droplet enters sheet laser 5, scattering light can be received by two photodetectors 4, two photoelectricity
Detector 4 converts optical signals into electric signal, and electric signal is into crossing the processing of signal acquisition transmission module, using calculating in computer
Obtain the drift value of droplet.The scattered light intensity as caused by granularity different droplet is different, so again on photodetector
The droplet of different grain size size can be distinguished, these droplets can carry out accumulative superposition according to volume cumulative level to which statistics obtains
Droplet drift value.
Due to the present invention using laser scattering method test droplet drift value, there is no test polytetrafluoroethylene (PTFE) rope because
The phenomenon that flow excessive generation saturation, also avoid the later period manually test polytetrafluoroethylene (PTFE) rope is rinsed, weighing when generate mistake
Difference, the present invention realize that the overall process of droplet drift value is tested using electronic control, and reproducible, test data is reliable with result
Property it is high, think that the failure for testing some part leads to the unreliable of test result before avoiding, this instrument is using overlength signal biography
Defeated, tester can test in remote control, avoid personnel and (poisonous and harmful) contact of droplet to tester
Member generates harm.The distance and measurement width that test drift value can also according to circumstances be adjusted, are arranged very flexible.In conclusion
The present invention tests droplet drift value using laser scattering method on the basis of original test droplet drift value, can save the time
Cost, the simplification of test procedure, protection tester simultaneously can provide reliable test result.
The present invention can be tested with complete independently, can also be connected according to testing requirement, quantity is unlimited, can satisfy
Test of the droplet drift value in different distance.
Claims (6)
1. a kind of light scattering method droplet drift value test device, it is characterised in that: including bottom bracket, guide rail, the first instrument master
Body, the second apparatus subject, photodetector, wherein guide rail both ends are installed on the bottom bracket of two sides, the first apparatus subject and
Two apparatus subjects are movably installed on guide rail, photodetector be two, be separately mounted to the first apparatus subject and
On second apparatus subject, sheet laser emitter is equipped in the first apparatus subject.
2. light scattering method droplet drift value test device according to claim 1, it is characterised in that: the sheet laser hair
Emitter, which has, is sequentially arranged the optical path formed by laser, diaphragm, Bao Weier prism and non-spherical lens, and wherein laser is sent out
Parallel hot spot out is filtered by the aperture of diaphragm, is compressed slabbing diverging light spot using Bao Weier prism, is finally passed through
Non-spherical lens collimates diverging piece hot spot, becomes parallel light sheets.
3. light scattering method droplet drift value test device according to claim 1, it is characterised in that: the first apparatus subject,
Second apparatus subject is oppositely arranged, and outside is shell structure, and two photodetectors are installed on shell structure opposite face top
On sustained height position.
4. light scattering method droplet drift value test device according to claim 1, it is characterised in that: guide rail is double guide rails,
It is parallelly mounted between two bottom brackets；First apparatus subject, the second apparatus subject bottom end are equipped with multiple wheels, tight with double guide rails
Close fit.
5. light scattering method droplet drift value test device according to claim 1, it is characterised in that: two photodetectors it
Between adjustable distance be 10~2000mm.
6. light scattering method droplet drift value test device according to claim 1, it is characterised in that: in the second apparatus subject
Interior installation control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515391.3A CN110160741A (en) | 2019-06-14 | 2019-06-14 | A kind of light scattering method droplet drift value test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515391.3A CN110160741A (en) | 2019-06-14 | 2019-06-14 | A kind of light scattering method droplet drift value test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110160741A true CN110160741A (en) | 2019-08-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515391.3A Pending CN110160741A (en) | 2019-06-14 | 2019-06-14 | A kind of light scattering method droplet drift value test device |
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| Country | Link |
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| CN (1) | CN110160741A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371309A (en) * | 2022-01-18 | 2022-04-19 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-cost high-precision PIV measuring device and using and measuring method thereof |
| CN114993886A (en) * | 2022-08-08 | 2022-09-02 | 北京市农林科学院智能装备技术研究中心 | Aerial pesticide application drift measuring device, system and method |
Citations (5)
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|---|---|---|---|---|
| JPH02173550A (en) * | 1988-12-26 | 1990-07-05 | Shimadzu Corp | Particle size distribution measuring instrument |
| JPH1090158A (en) * | 1996-09-19 | 1998-04-10 | Noritz Corp | Apparatus for measuring concentration and grain size of air-borne particles |
| CN106568575A (en) * | 2016-11-11 | 2017-04-19 | 东南大学 | Optical difference-based multi-jet flow acting flow field display device and method |
| CN107063949A (en) * | 2016-12-30 | 2017-08-18 | 北京农业智能装备技术研究中心 | Measure the methods, devices and systems of mist droplet deposition distribution situation |
| CN209878265U (en) * | 2019-06-14 | 2019-12-31 | 丹东百特仪器有限公司 | Device for testing droplet drift amount by light scattering method |
-
2019
- 2019-06-14 CN CN201910515391.3A patent/CN110160741A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173550A (en) * | 1988-12-26 | 1990-07-05 | Shimadzu Corp | Particle size distribution measuring instrument |
| JPH1090158A (en) * | 1996-09-19 | 1998-04-10 | Noritz Corp | Apparatus for measuring concentration and grain size of air-borne particles |
| CN106568575A (en) * | 2016-11-11 | 2017-04-19 | 东南大学 | Optical difference-based multi-jet flow acting flow field display device and method |
| CN107063949A (en) * | 2016-12-30 | 2017-08-18 | 北京农业智能装备技术研究中心 | Measure the methods, devices and systems of mist droplet deposition distribution situation |
| CN209878265U (en) * | 2019-06-14 | 2019-12-31 | 丹东百特仪器有限公司 | Device for testing droplet drift amount by light scattering method |
Non-Patent Citations (2)
| Title |
|---|
| 王志翀 等: "基于激光成像技术的农药雾滴飘移评价方法研究", 农业工程学报, no. 09, pages 73 - 79 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371309A (en) * | 2022-01-18 | 2022-04-19 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-cost high-precision PIV measuring device and using and measuring method thereof |
| CN114993886A (en) * | 2022-08-08 | 2022-09-02 | 北京市农林科学院智能装备技术研究中心 | Aerial pesticide application drift measuring device, system and method |
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