CN109001083A - A kind of drum-type nonuniform scanning grain sorting experimental rig and its test method - Google Patents
A kind of drum-type nonuniform scanning grain sorting experimental rig and its test method Download PDFInfo
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- CN109001083A CN109001083A CN201810584169.4A CN201810584169A CN109001083A CN 109001083 A CN109001083 A CN 109001083A CN 201810584169 A CN201810584169 A CN 201810584169A CN 109001083 A CN109001083 A CN 109001083A
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- 238000010998 test method Methods 0.000 title description 5
- 239000011521 glass Substances 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
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- 230000003287 optical effect Effects 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 208000033748 Device issues Diseases 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 abstract description 10
- 238000011160 research Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 description 22
- 238000002474 experimental method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000009666 routine test Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
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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, e.g. by light scattering, diffraction, holography or imaging
- G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
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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
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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
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
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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
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble
Abstract
A kind of drum-type nonuniform scanning grain sorting experimental rig, the spherical glass pearl of different-grain diameter needed for transparent cylinder is used to accommodate test, side constrains axial displacement by thrust bearing, and installs shield at top；Driving motor is placed on the upside of transparent cylinder, and the rotation of transparent cylinder is driven by gear drive；The laser beam of laser transmitting passes through the circular cross-section of transparent cylinder in the form of lasing area, and the section that laser beam illuminates in cylindrical roller is the shooting area of high speed camera；High speed camera is used to shoot the displacement characteristic of the spherical glass pearl in laser irradiation section, is connect by data line with computer to store the image of its shooting.And provide a kind of drum-type nonuniform scanning grain sorting experimental rig.The present invention simplifies the physical process of nonuniform scanning diffusion and sorting, the influence of other distracters during the test in addition to partial size is reduced, so that obtaining more regular test data is used to support theoretical research.
Description
Technical field
The present invention relates to Bed Load Movement field, a kind of drum-type nonuniform scanning grain sorting experimental rig and its examination
Proved recipe method, for simulating the diffusion characteristic of nonuniform scanning particle and the sorting rule of different-grain diameter bed load.
Background technique
The diffusion of bed load and sorting property are formed with great influence for the river bed deposit and riverbed Sha Po in river mouth.River
The surface layer of bed is usually roughened layer, and fine grained bed load is usually to riverbed bottom deposit, and people are universal for the nature
The cognition of regular formation mechenism is very limited.
For the formation mechenism for understanding this physical feature, researchers establish the physical experiments of similar proportion, adopt
With the nonuniform scanning in the particle simulation nature of different-grain diameter.Experiments have shown that the partial size of bed load is to its deposition process
And the separation characteristic of vertical cross section has important influence.Therefore, difference is further sought by simplified physical experiments
The sorting rule of partial size bed load, and be its Search Theory model, it is the inevitable direction of future studies.
Current common bed load grain sorting experimental rig is usually to establish in interior length gentle slope sink simulation nature
Riverbed, and determine according to the theory of similarity partial size of bed load, fill the water and supply bed load in sink upstream side by long-time
Particle, to simulate the movement that the flowing in river pushes slot bottom bed load.The program needs while water filling, continues in upstream side
Bed load particle is fed, after bed load particle enters sink in upstream side, a part carries outflow sink tail end by water flow, another
Part deposits to bottom of gullet.The problem of program is, one, bed load moves existing random process in the sink leads to this
The test data that scheme obtains not enough simplifies, and theoretical research is usually simplified model, and the program is difficult for theoretical research offer
Support；Two, the corresponding relationship of the flow velocity of water and corresponding bed load delivery rate regulation can opereating specification it is excessive, to a certain degree
The upper universality for reducing experimental study.Three, the error during bed load supply not can avoid, and sedimentary loading is difficult to control accurately.
Four, for interior length sink for guarantee test scale, occupied space is usually excessive；Five, real-time monitoring difficulty is big, and each time
Point cannot all replicate.
Chinese invention patent " bed load vertical cross section sorts model test apparatus and its application method " (patent No.:
CN105841920A), disclose a kind of slot bottom by closed sink and conveyer belt is installed to replace the solution of long sink.
The program solves the problems, such as that interior length sink space occupied is excessive, and realizes bed load grain sorting and diffusion process
Show in real time, but the analysis that theorizes of test data is still not simple and effective enough, is difficult to accomplish the conclusion to its general formula
It summarizes.
Therefore it provides a kind of experimental rig of the water trough design of simplified routine provides support for theoretical research, it is scientific research
The direction that personnel and engineers and technicians lay siege to, and are carried out by deep theory and is ground for nonuniform scanning diffusion and sorting
The necessary condition studied carefully.
Summary of the invention
In order to overcome in prior art, the physical process of nonuniform scanning diffusion and sorting is complicated, validity is poor not
Foot, the present invention provides a kind of drum-type nonuniform scanning grain sorting experimental rig and its test methods, for different grains
The bed load of diameter sorts design experiment device, simplifies the physical process of nonuniform scanning diffusion and sorting, reduce except partial size it
The influence of other outer distracters during the test is ground to obtain more regular test data and be used to support theory
Study carefully.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of drum-type nonuniform scanning grain sorting experimental rig, including bracket and rack-mount transparent circle
Cylinder, driving motor, laser equipment and optical mirror slip and high speed camera, difference needed for the transparent cylinder is used to accommodate test
The spherical glass pearl of partial size, by 4 rack-mount pulley supports, the transparent cylinder side by thrust bearing come
Axial displacement is constrained, and shield is installed at the top for avoiding laser irradiation range and cameras line；The driving electricity
Machine is frequency control motor, is placed on the upside of transparent cylinder, and the rotation of transparent cylinder is driven by gear drive；The source, laser apparatus
Standby and optical mirror slip includes a laser, and the laser beam of the laser transmitting passes through focusing lens, reflex reflector lens and angle
The circular cross-section that transparent cylinder is passed through in the form of lasing area is bored, the section that laser beam illuminates in cylindrical roller is high speed phase
The shooting area of machine；The high speed camera is used to shoot the displacement characteristic of the spherical glass pearl in laser irradiation section, described
High speed camera is connect to store the image of its shooting with computer by data line.
Preferably, the transparent cylinder is transparent organic glass material, and drum diameter is 30cm~60cm, and cylinder is long
Degree is 40cm~70cm, and roller wall thickness is 1.5cm~2.5cm.
The shield is organic plastics material, and with a thickness of 2cm~4cm, shield is connected to by arc fixed strip
On bracket, the shield can avoid transparent cylinder in experimentation and slide, to increase the safety of device.
The driving motor can be after being powered up 0.1r/s~5r/s with uniform rotation, revolving speed adjustable extent,
Gear is installed on machine shaft head, and diameter is 10cm~30cm, and the driving motor is placed in above transparent cylinder, for driving
The rotation of bright cylinder, the transparent cylinder and driving motor contact portion install gear, and other parts are smooth surface.
The high speed camera is black and white camera or color camera, for shooting inside transparent cylinder, in 600*800 pixel
Highest filming frequency under several is not less than 30fps, and high speed camera is located at immediately ahead of cylinder sides, is fixed on tripod, adjusts
The height of tripod and position, whole cross section should be covered by so that it is shot window, connect computer by data line.
The wavelength of the laser transmitting laser is 532nm, power 3KW~8KW, the branch being fixed on above experimental rig
On frame, the light beam that laser issues is by the adjustment of condenser, reflective mirror and pyramid to opticpath, across the circle of transparent cylinder
Tee section.
The bracket is aluminum alloy material, is fixed between bracket by welding and screw, the bracket includes level-one bracket
And secondary stent, the level-one bracket are the rectangular square tube of 5cm*10cm, the secondary stent is the rectangular square tube of 5cm*5cm.
A kind of drum-type nonuniform scanning grain sorting test method, comprising the following steps:
(1) bracket is made；
(2) the transparent glass pearl for choosing 2-3 kind different-grain diameter, is placed in the transparent cylinder processed according to required ratio,
So that transparent glass pearl fills up entire transparent cylinder；
(3) clear water is filled it up in transparent cylinder, 0.1g~0.5g rhodamine coloring agent is then added in clear water, and close
Roller；
(4) transparent cylinder is placed on 4 pulleys, and axial displacement is constrained by thrust bearing in side, in transparent circle
Protective cover is installed in cylinder outside, and is fixed on bracket, and driving motor is then installed, and driving motor and the transparent cylinder link；
(5) laser is fixed on bracket, and condenser, reflective mirror and pyramid is successively installed, adjust testing lens position
It sets, makes laser beam just past center of lens, make its range of exposures that can cover the circular cross-section of entire transparent cylinder；
(6) high speed camera is installed, and is connect it with computer by data line, high speed camera is mounted on and side shield
Opposite side is covered, camera lens adjusts height and the position of tripod perpendicular to coplanar laser illumination, makes the shooting window of high speed camera
The entire circular cross-section of mouth covering transparent cylinder；
(7) driving motor is powered on, makes its uniform rotation, and need to adjust its revolving speed according to test；Open high speed
Camera, the shooting frame number per second of setting high-speed camera and total shooting duration of video；All light sources in experimental facilities periphery are closed, laser is opened
Device, and laser intensity is adjusted according to the effect of camera display window；
(8) after the test, the video recording of high speed camera shooting is saved, and is stored as video format or picture format；It closes
Laser, high speed camera and driving motor；
(9) displacement characteristic of transparent glass pearl is obtained using image processing techniques based on the image information taken.
Preferably, in the step (1), with rectangular aluminium alloy square tubes soldering bracket, and pulley and backing plate are installed.
In the step (4), the transparent cylinder and driving motor contact portion install gear, two gear engagements.
In the present invention, by the bed load particle merging transparent cylinder of different-grain diameter, stop roller not
Rotation, the bed load of different-grain diameter can sort during rotation.There are large-size particles and expands to the periphery in the experimental rig
It dissipates, the feature that small size particle is spread to axle center, these are deposited downwards with riverbed small size particle in nature, large-size particles
Be usually deposited at riverbed surface layer be characterized in it is corresponding.In addition, irradiating transparent cylinder section using laser beam, pass through high speed phase
The circular cross-section of machine observation drum-type experimental rig obtains the real-time distribution characteristics of particle of different-grain diameter, so as to obtain
The dynamic process of grain sorting.And the device can simply and effectively be ground there is no the limitation of the factors such as water flow and sedimentary loading
Study carefully the movement mechanism of assorting room, and provides possibility for corresponding theoretical research.
The characteristics of device is the particle of different-grain diameter to be placed in transparent cylinder, and continue to rotate transparent cylinder to realize
The displacement transition of internal different-grain diameter particle.It is spread with small size particle to axle center by studying large-size particles and spreading to the periphery
Displacement change feature, as bed load non-uniform granular sorting simplification physical experiments.The program is not only simple
The physical model for having changed conventional bed load sorting and diffusion, avoids the disturbing factors such as water speed in routine test, boundary effect,
The displacement data of simple and effective and regular apparent two kinds of particles can be obtained, and can be real-time to its displacement characteristic
Lot of experimental data is monitored and obtained, makes to summarize that its displacement law is more easy, the theoretical research for bed load sorting provides
Reliable simplified model.
Beneficial effects of the present invention are mainly manifested in: the device uses transparent cylinder as experimental rig, by making clear of
Internal large-size particles move the speed and displacement mobile to axle center with small size particle to the periphery in the rotation process of bright cylinder
Feature simplifies the physical model of conventional bed load sorting and diffusion, it is dry to avoid water speed in routine test, boundary effect etc.
Factor is disturbed, the displacement data of simple and effective and regular apparent two kinds of particles can be obtained, and to its displacement characteristic reality
When monitor, for bed load sorting theoretical research provide simplified model and reliable test basis.
Detailed description of the invention
Fig. 1 is experimental rig front view of the present invention；
Fig. 2 is experimental rig side view of the present invention；
Fig. 3 is experimental rig roller bearing and cylinder joining place detail view of the present invention；
Wherein, 1 is connects wires, and 2 be laser, and 3 be No.1 laser focusing lens, and 4 be eyeglass fixing axle, and 5 be reflective mirror
Piece, 6 be No. two laser focusing lens, and 7 be pyramid, and 8 be shield, and 9 be high speed camera range of exposures, and 10 be high speed camera, 11
It is computer for data line, 12,13 be tripod, and 14 be level-one bracket, and 15 be bracket base, and 16 be secondary stent, and 17 be pad
Plate, 18 be driving motor, and 19 be thrust bearing, and 20 be spherical glass pearl, and 21 be pulley, and 22 be arc fixed strip, and 23 be transparent
Cylinder, 24 be laser beam, and 25 be cylinder gear, and 26 be driving motor gear.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
It referring to Fig.1~Fig. 3, a kind of drum-type nonuniform scanning grain sorting experimental rig, including bracket and is mounted on
Transparent cylinder, driving motor, laser equipment and optical mirror slip and high speed camera on bracket, the transparent cylinder is for accommodating
The spherical glass pearl of different-grain diameter needed for test, by 4 rack-mount pulley supports, the transparent cylinder side
Axial displacement is constrained by thrust bearing, and in the top installation protection for avoiding laser irradiation range and cameras line
Cover；The driving motor is frequency control motor, is placed on the upside of transparent cylinder, drives turning for transparent cylinder by gear drive
It is dynamic；The laser equipment and optical mirror slip includes a laser, and the laser beam of the laser transmitting passes through focus lamp
Piece, reflex reflector lens and pyramid pass through the circular cross-section of transparent cylinder in the form of lasing area, and laser beam shines in cylindrical roller
Bright section is the shooting area of high speed camera；The high speed camera is used to shoot the spherical glass pearl in laser irradiation section
Displacement characteristic, the high speed camera are connect to store the image of its shooting with computer by data line.
Preferably, the transparent cylinder is transparent organic glass material, and drum diameter is 30cm~60cm, and cylinder is long
Degree is 40cm~70cm, and roller wall thickness is 1.5cm~2.5cm.
The shield is organic plastics material, and with a thickness of 2cm~4cm, shield is connected to by arc fixed strip
On bracket, the shield can avoid transparent cylinder in experimentation and slide, to increase the safety of device.
The driving motor can be after being powered up 0.1r/s~5r/s with uniform rotation, revolving speed adjustable extent,
Gear is installed on machine shaft head, and diameter is 10cm~30cm, and the driving motor is placed in above transparent cylinder, for driving
The rotation of bright cylinder, the transparent cylinder and driving motor contact portion install gear, and other parts are smooth surface.
The high speed camera is black and white camera or color camera, for shooting inside transparent cylinder, in 600*800 pixel
Highest filming frequency under several is not less than 30fps, and high speed camera is located at immediately ahead of cylinder sides, is fixed on tripod, adjusts
The height of tripod and position, whole cross section should be covered by so that it is shot window, connect computer by data line.
The wavelength of the laser transmitting laser is 532nm, power 3KW~8KW, the branch being fixed on above experimental rig
On frame, the light beam that laser issues is by the adjustment of condenser, reflective mirror and pyramid to opticpath, across the circle of transparent cylinder
Tee section.
The bracket is aluminum alloy material, is fixed between bracket by welding and screw, the bracket includes level-one bracket
And secondary stent, the level-one bracket are the rectangular square tube of 5cm*10cm, the secondary stent is the rectangular square tube of 5cm*5cm.
In the present embodiment, device is by connecting wires 1, laser 2, No.1 laser focusing lens 3, eyeglass fixing axle 4, reflective mirror
Piece 5, No. two laser focusing lens 6, pyramid 7, shield 8, high speed camera 10, data line 11, computer 12, tripod 13, one
Grade bracket 14, bracket base 15, secondary stent 16, backing plate 17, driving motor 18, thrust bearing 19, spherical glass pearl 20, pulley
21, arc fixed strip 22, transparent cylinder 23, cylinder gear 25, the composition of driving motor gear 26.
The device, as experimental rig, passes through internal big partial size in the rotation process of research transparent cylinder using transparent cylinder
Particle moved to the periphery with small size particle simplify to the mobile speed in the center of circle and displacement characteristic conventional bed load sorting and
The physical model of diffusion avoids the disturbing factors such as water speed in routine test, boundary effect, can obtain simple and effective and regular
Property apparent two kinds of particles displacement data, and to its displacement characteristic real-time monitoring, for the theoretical research of bed load sorting
Provide simplified model and reliable test basis.
A kind of drum-type nonuniform scanning grain sorting test method, comprising the following steps:
(1) bracket is made；
(2) the transparent glass pearl for choosing 2-3 kind different-grain diameter, is placed in the transparent cylinder processed according to required ratio,
So that transparent glass pearl fills up entire transparent cylinder；
(3) clear water is filled it up in transparent cylinder, 0.1g~0.5g rhodamine coloring agent is then added in clear water, and close
Roller；
(4) transparent cylinder is placed on 4 pulleys, and axial displacement is constrained by thrust bearing in side, in transparent circle
Protective cover is installed in cylinder outside, and is fixed on bracket, and driving motor is then installed, and driving motor and the transparent cylinder link；
(5) laser is fixed on bracket, and condenser, reflective mirror and pyramid is successively installed, adjust testing lens position
It sets, makes laser beam just past center of lens, make its range of exposures that can cover the circular cross-section of entire transparent cylinder；
(6) high speed camera is installed, and is connect it with computer by data line, high speed camera is mounted on and side shield
Opposite side is covered, camera lens adjusts height and the position of tripod perpendicular to coplanar laser illumination, makes the shooting window of high speed camera
The entire circular cross-section of mouth covering transparent cylinder；
(7) driving motor is powered on, makes its uniform rotation, and need to adjust its revolving speed according to test；Open high speed
Camera, the shooting frame number per second of setting high-speed camera and total shooting duration of video；All light sources in experimental facilities periphery are closed, laser is opened
Device, and laser intensity is adjusted according to the effect of camera display window；
(8) after the test, the video recording of high speed camera shooting is saved, and is stored as video format or picture format；It closes
Laser, high speed camera and driving motor；
(9) displacement characteristic of transparent glass pearl is obtained using image processing techniques based on the image information taken.
Preferably, in the step (1), with rectangular aluminium alloy square tubes soldering bracket, and pulley and backing plate are installed.
In the step (4), the transparent cylinder and driving motor contact portion install gear, two gear engagements.
Example 1: partial size is tested than the influence in bed load assorting room
The transparent cylinder 23 of prefabricated pmma material, diameter 40cm, length 60cm, the wall thickness of roller are 1.5cm.
The black shield 8 of prefabricated organic plastic material, with a thickness of 3cm.The rectangular square tube for preparing aluminum alloy material is several, prepares screw
Several, level-one bracket 14 need to be the rectangular square tube of 5cm*10cm, and secondary stent 16 need to be the rectangular square tube of 5cm*5cm.It will be prefabricated
Shield 8 be fixed on level-one bracket 14 on the outside of the transparent cylinder 23 by arc fixed strip 22.Purchasing maximum (top) speed is
5r/s, diameter be 10cm driving motor 18, and install on the support 14, shaft head install gear 26, make its with it is transparent
The engagement of 23 outboard gears 25 of cylinder.Black and white high speed camera 10 is mounted on tripod 13, and adjust tripod 13 height and
Position makes its range of exposures 9 that should cover entire cylinder section, connects computer 12, filming frequency setting by data line 11
For 10fps.Installation wavelength is the laser 2 of 532nm, power 3KW, and is fixed in the secondary stent 16 above experimental rig
On, installation condenser 3, reflective mirror 5 and pyramid 7 adjust optical mirror slip position, laser beam 24 are made to may pass through its center, and
And illuminate the section of entire transparent cylinder.
The concrete operations of test are divided into three groups:
Battery of tests chooses diameter transparent glass pearl 20 more identical than two kinds of materials for 1:2, small size transparent glass pearl
Diameter 1cm, large size transparent glass pearl diameter 2cm, is placed in transparent cylinder 23, so that transparent glass pearl 20 according to the ratio of 1:1
Fill up entire transparent cylinder 23.Clear water is filled it up in transparent cylinder 23, and 0.5g rhodamine coloring agent is then added in clear water, and
Close transparent cylinder 23.Transparent cylinder 23 is placed on 4 pulleys 21, and axial position is constrained by thrust bearing 19 in side
It moves, protective cover 8 is installed and is fixed on the support 14 by arc fixed strip 22, then driving motor 18 is installed.By driving motor
18 connect wires 1, rotate its average rate, and need to adjust its revolving speed according to test.Open high speed camera 10, setting high-speed phase
The shooting frame number per second of machine 10 and total shooting duration of video.All light sources in experimental facilities periphery are closed, open laser 2, and according to phase
The effect of machine display window adjusts laser intensity.After the test, the video recording of high speed camera shooting is saved, and is stored as video lattice
Formula or picture format.Close laser 2, high speed camera 10 and driving motor 18.Based on the image information taken, image is utilized
Processing technique obtains the velocity field of fluid in the displacement characteristic and section of transparent glass pearl 20.
Diameter transparent glass pearl 20 more identical than two kinds of materials for 1:3, small size transparent glass pearl are chosen in second group of test
Diameter 1cm, large size transparent glass pearl diameter 3cm, is placed in transparent cylinder 23 according to the mass ratio of 1:1, other are the same as first group of examination
It tests.
Diameter transparent glass pearl 20 more identical than two kinds of materials for 1:4, small size transparent glass pearl are chosen in the test of third group
Diameter 1cm, large size transparent glass pearl diameter 4cm, is placed in transparent transparent cylinder 23 according to the mass ratio of 1:1, other are the same as the
Battery of tests.
Claims (10)
1. a kind of drum-type nonuniform scanning grain sorting experimental rig, which is characterized in that including bracket and be mounted on bracket
On transparent cylinder, driving motor, laser equipment and optical mirror slip and high speed camera, the transparent cylinder for accommodate test
The spherical glass pearl of required different-grain diameter, by 4 rack-mount pulley supports, the transparent cylinder side passes through
Thrust bearing installs shield at the top for avoiding laser irradiation range and cameras line to constrain axial displacement；Institute
The driving motor stated is frequency control motor, is placed on the upside of transparent cylinder, and the rotation of transparent cylinder is driven by gear drive；Institute
The laser equipment and optical mirror slip stated include a laser, and the laser beam of the described laser transmitting passes through focusing lens, anti-
Light microscopic piece and pyramid pass through the circular cross-section of transparent cylinder in the form of lasing area, and what laser beam illuminated in cylindrical roller cuts
Face is the shooting area of high speed camera；The displacement that the high speed camera is used to shoot the spherical glass pearl in laser irradiation section is special
Sign, the high speed camera are connect to store the image of its shooting with computer by data line.
2. a kind of drum-type nonuniform scanning grain sorting experimental rig as described in claim 1, which is characterized in that described
Transparent cylinder be transparent organic glass material, drum diameter be 30cm~60cm, drum length be 40cm~70cm, roller
Wall thickness is 1.5cm~2.5cm.
3. a kind of drum-type nonuniform scanning grain sorting experimental rig as claimed in claim 1 or 2, which is characterized in that
The shield is organic plastics material, and with a thickness of 2cm~4cm, shield is connected on bracket by arc fixed strip.
4. a kind of drum-type nonuniform scanning grain sorting experimental rig as claimed in claim 1 or 2, which is characterized in that
The revolving speed adjustable extent of the driving motor is 0.1r/s~5r/s, and gear, diameter 10cm are installed in machine shaft head
~30cm, the driving motor are placed in above transparent cylinder, for driving the rotation of transparent cylinder, the transparent cylinder and driving
Motor contact portion installs gear, and other parts are smooth surface.
5. a kind of drum-type nonuniform scanning grain sorting experimental rig as claimed in claim 1 or 2, which is characterized in that
The high speed camera be black and white camera or color camera, for shooting inside transparent cylinder, under 600*800 pixel number most
High filming frequency is not less than 30fps, and high speed camera is located at immediately ahead of cylinder sides, is fixed on tripod, adjusts tripod
Height and position, whole cross section should be covered by so that it is shot window, connect computer by data line.
6. a kind of drum-type nonuniform scanning grain sorting experimental rig as claimed in claim 1 or 2, which is characterized in that
The wavelength of the laser transmitting laser is 532nm, and power 3KW~8KW is fixed on the bracket above experimental rig, is swashed
The light beam that light device issues is by the adjustment of condenser, reflective mirror and pyramid to opticpath, across the circular cross-section of transparent cylinder.
7. a kind of drum-type nonuniform scanning grain sorting experimental rig as claimed in claim 1 or 2, which is characterized in that
The bracket is aluminum alloy material, is fixed between bracket by welding and screw, the bracket includes level-one bracket and second level branch
Frame, the level-one bracket are the rectangular square tube of 5cm*10cm, and the secondary stent is the rectangular square tube of 5cm*5cm.
8. a kind of method that drum-type nonuniform scanning grain sorting experimental rig as described in claim 1 is realized, special
Sign is, the described method comprises the following steps:
(1) bracket is made；
(2) the transparent glass pearl for choosing 2-3 kind different-grain diameter, is placed in the transparent cylinder processed according to required ratio, so that
Transparent glass pearl fills up entire transparent cylinder；
(3) clear water is filled it up in transparent cylinder, 0.1g~0.5g rhodamine coloring agent is then added in clear water, and close rolling
Cylinder；
(4) transparent cylinder is placed on 4 pulleys, and axial displacement is constrained by thrust bearing in side, outside transparent cylinder
Protective cover is installed in side, and is fixed on bracket, then installs driving motor, and driving motor and the transparent cylinder link；
(5) laser is fixed on bracket, and condenser, reflective mirror and pyramid is successively installed, adjusted testing lens position, make
Laser beam makes its range of exposures that can cover the circular cross-section of entire transparent cylinder just past center of lens；
(6) high speed camera is installed, and is connect it with computer by data line, high speed camera is mounted on and side shield phase
Anti- side, camera lens adjust height and the position of tripod perpendicular to coplanar laser illumination, cover the shooting window of high speed camera
The entire circular cross-section of lid transparent cylinder；
(7) driving motor is powered on, makes its uniform rotation, and need to adjust its revolving speed according to test；High speed camera is opened,
The shooting frame number per second of setting high-speed camera and total shooting duration of video；All light sources in experimental facilities periphery are closed, laser is opened, and
Laser intensity is adjusted according to the effect of camera display window；
(8) after the test, the video recording of high speed camera shooting is saved, and is stored as video format or picture format；Close laser
Device, high speed camera and driving motor；
(9) displacement characteristic of transparent glass pearl is obtained using image processing techniques based on the image information taken.
9. method according to claim 8, it is characterised in that: in the step (1), with rectangular aluminium alloy square tubes soldering branch
Frame, and pulley and backing plate are installed.
10. method as claimed in claim 8 or 9, it is characterised in that: in the step (4), the transparent cylinder and driving electricity
Machine contact portion installs gear, two gear engagements.
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| CN201810584169.4A CN109001083B (en) | 2018-06-08 | Roller type non-uniform bed-load particle sorting test device and test method thereof |
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| CN201810584169.4A CN109001083B (en) | 2018-06-08 | Roller type non-uniform bed-load particle sorting test device and test method thereof |
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| CN109001083A true CN109001083A (en) | 2018-12-14 |
| CN109001083B CN109001083B (en) | 2024-05-10 |
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| CN113556452A (en) * | 2021-07-19 | 2021-10-26 | 柴勇 | Photographing device and photographing method |
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