CN107860431A - A kind of measuring method for auger conveyor mass flow - Google Patents
A kind of measuring method for auger conveyor mass flow Download PDFInfo
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- CN107860431A CN107860431A CN201711090616.2A CN201711090616A CN107860431A CN 107860431 A CN107860431 A CN 107860431A CN 201711090616 A CN201711090616 A CN 201711090616A CN 107860431 A CN107860431 A CN 107860431A
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- laser
- auger conveyor
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- cereal
- blade
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Screw Conveyors (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of measuring method for auger conveyor mass flow, industrial camera and laser are demarcated first, choose line laser datum line；With laser triangulation, when shooting auger conveyor carry grain by industrial camera, the picture of the cereal surface laser line morphology change of line laser irradiation helical blade push, is handled picture, the relation established between pictorial information and push volume of material in real time；And then obtain the volume of material flow of auger conveyor push and cumulative cumulative volume.The present invention is measured the volume flow of auger conveyor push material in real time using laser triangulation, available for general auger conveyor, the particularly defeated grain screw feeder of grain combine, production is surveyed for field, and one new measuring method is provided, laser measurement method precision is high simultaneously, measurement effect is stable, can improve survey production precision.
Description
Technical field
The invention belongs to field of measuring technique, is related to a kind of measuring method for auger conveyor mass flow.
Background technology
During united reaper harvesting grain, real-time yield is that one of most important information for obtaining is needed in precision agriculture, it
The influence to yield such as soil, agricultural chemicals, insect pest can directly be reacted.Thus the producer can enter according to these information to farmland
Row Scientific Regulation, so as to the purpose for reaching cost-effective, improving yield, reducing pollution.Cereal region production information is obtained, is established
Yield distribution in space figure is the starting point for implementing precision agriculture, therefore the real-time accurate measurement of yield is become for key.
It is varied that production method is surveyed at this stage, main point of following several classes, weight method, impulse momentum method, gamma-rays method, volumetric method；
External many companies and scientific research institution have been proposed many experiments and application apparatus, their research and have focused primarily upon grain stream
Quantity sensor technology, and the research of Yield mapping error analysis.It is wherein representational to have：Arslan etc. is joined with JohnDeere4420
Conjunction harvester is main body, devises a kind of united reaper system for measuring yield experimental rig, mainly including feeding auger, elevator,
Enter tanker etc..Schrock etc. liquidates the experiment of volume sensor progress, it was demonstrated that into stronger non-linear between flow and impulsive force
Relation.A kind of metering device Peter Krass output apparatus based on positive displacement designed by Britain Norfolk prefecture Mr. Clayton.
The country starts late, and is presently mainly that some universities and scientific research institutions are introducing more using flow sensor as core
Developed on the basis of foreign technology, wherein what is represented has：All persons of outstanding talent etc. design a kind of parallel girder construction impulse type cereal of volume
Flow sensor, and damping design has been carried out to sensor, its method is to wrap cantilever beam using polymer damping material to carry out
Damping.The Ma Chaoxing of Jiangsu University proposes to carry out thickness measure using laser sensor, further according to cereal unit weight and transmission speed
To measure flow, but easily by rice thickness effect.Open small superfine people and devise Weighing type sensor, it is excessive to harvester change,
And easily by harvester vibration effect.
Existing survey production method, is weighed, and volume, these three methods of momentum are easily influenceed by outside environmental elements, and to harvesting
The change of the equipment such as machine is excessive, can not the highly effective real-time grain yield information of reaction.And although gamma-rays method precision is high,
It has radioactivity, there is certain influence in itself on cereal.The united reaper in China uses helical feed transportation device at present, because
This research turns into a developing direction for surveying production applied to the mass flow rate sensing of auger conveyor.
The content of the invention
It is an object of the invention to provide a kind of measuring method for auger conveyor mass flow, surveys production for agricultural and carries
For a kind of measuring method of new mass flow；
The technical solution adopted in the present invention is that industrial camera and laser are demarcated first, chooses line laser benchmark
Line；With laser triangulation, when shooting auger conveyor carry grain by industrial camera, line laser irradiation helical blade push
Cereal surface laser line morphology change picture, picture is handled in real time, establishes pictorial information and push cereal body
Relation between product；
Dally auger conveyor, by image procossing, obtains the body that the helical blade sky of line laser irradiation position circles
Product change V1；When carrying out cereal transmission, the laser rays that cereal surface is radiated at by industrial camera acquisition line laser changes picture,
Processing picture obtains the area S surrounded between curve and line laser datum linei；Real-time statistics blade rotates a circle industrial phase simultaneously
Machine shooting picture number Ni, time ti, blade rotating cycle n, the blade cereal forward travel distance that rotates a circle is a pitch S；And calculate
During auger conveyor grain transportation, Volume Changes V that the line laser that often rotates a circle is insweptf, by mathematical modeling draw to not by
The cereal volume V that camera photographst, and then obtain auger conveyor and rotate a circle the cereal volume V of pushi；Cumulative cumulative volume
V。
The industrial camera and laser are arranged close on the test desk of discharging opening side, line laser vertical irradiation spiral
Helical blade in conveyer.
Further,
Further, VtComputational methods：When carrying out cereal conveying, because blade has certain gradient to cause blade to swashing
Light blocks, and according to auger conveyor material movement law, can not form a gradient by the cereal surface that camera photographs, take
Blade each week rotates some continuous pictures when starting, and extracts the pixel of the row of these pictures fixation, if height is hi, so
Be put into some ordered series of numbers, by two groups of neighbouring ordered series of numbers, subtracted with the latter ordered series of numbers it is previous that pixels tall is poor, due to helical feed
Device moving step sizes L=S/ (Ni- 1), carry out afterwards than be worth each row between slope value, after take the average of whole slopes can be near
As obtain surface of material slope k；So can approximately it be asked by triangle theorem and the parameter of auger conveyor body itself
Obtain the sectional area S of a pitch intra vane push cereal direction of advance front endtThe first width picture area is when if blade rotates
S1, irregular prism height h is drawn using cereal surface slope k and selection picture pixels relevant height, is so blocked
Volume can approximately be written as
Further, auger conveyor rotates a circle the cereal volume V of pushi, cumulative cumulative volume V：Vi=Vf+Vt-V1,
Present invention has the advantages that first Application laser triangulation auger conveyor conveying mass flow is carried out it is real-time
Measurement, survey production for agricultural and a kind of new flow-measuring method is provided；Because laser optical method precision is high, material flow measurement can be improved
Accuracy of measurement.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
Fig. 1 auger conveyor flow measurement device figures；
Fig. 2 test desk schematic diagrames；
Fig. 3 line lasers irradiate auger conveyor top view；
Fig. 4 industrial cameras obtain helical blade summit laser facula figure；
Fig. 5 industrial cameras obtain line laser irradiation cereal surface curve；
In figure, 1. auger conveyors, 2. test desks, 3. lasers, 4. industrial cameras, 5. microsystems.
Embodiment
With reference to embodiment, the present invention is described in detail.
The present invention is measured the volume of auger conveyor grain transportation in real time using laser triangulation；Such as Fig. 1 institutes
A kind of measuring system for auger conveyor mass flow shown, including conveying worm 1, assemble on auger conveyor 1 and survey
Platform 2 is measured, test desk 2 is equipped with laser 3 and industrial camera 4, laser connection power supply, and industrial camera 4 is connected to microsystem
5；Each several part assembly relation is as follows, and industrial camera 4 is assemblied on test desk Fig. 2 with laser 3 by laser triangulation.As Fig. 3 swashs
Helical blade in the vertical irradiation auger conveyor of light device 3, irradiation position is close to discharging opening side；When conveying material, work
Industry camera is opened, and shooting photo uploads microsystem and handled in real time.
Auger conveyor mass flow measuring method principle is, using laser triangulation to auger conveyor push cereal
Volume is measured in real time.Such as Fig. 3, line laser irradiation position is constant, and helical blade is driven by motor to be rotated, by cereal forward
Promote, such line laser can be irradiated in the laser rays on helical blade, shape can occur because helical blade rotates with grain transportation
Shape changes as shown in figure 5, can show such cereal distribution trajectory in industrial camera, calculating is right half section in microsystem
The irregular area S that curve surrounds with datum curvei.When being rotated such as Fig. 4 helical blades, due to laser and industrial camera position
Fixed, blade often rotates one week, and a hot spot occurs in peak, so next time when same hot spot occurs in same position,
Illustrating that helical blade has had been rotated by one week, such cereal has moved a pitch simultaneously, and microsystem can count in real time,
The industrial camera that rotates a circle shooting number of pictures Ni, time ti, while blade rotating cycle can also be recorded in real time by microsystem
n.It is specific as follows：
Step 1: by laser triangulation to industrial camera, laser are assemblied on the test desk of auger conveyor；
Step 2: to the measuring system of auger conveyor mass flow, industrial camera is demarcated, and selectes auger conveyor
Line laser face on datum line；
Step 3: laser irradiating position volume asks for route：Because line laser irradiation position is fixed, when blade rotates, work
Industry camera is taken pictures to laser rays in real time, and method is sought with irregular area, is asked for laser rays in picture and is enclosed with selected reference line
Into graphics area Si；Simultaneously according to auger conveyor movement characteristic, the blade cereal forward travel distance that rotates a circle is a pitch
S, microsystem can scan according to pictorial information and record blade summit hot spot occurrence number, to determine that blade rotates a circle industry
Camera shooting number of pictures Ni, time ti, helical blade rotating cycle n, the revolution n of auger conveyori, and in real time in microsystem
Display；Blade can be tried to achieve by above known parameters to rotate a circle, the volume that laser is inswept
Step 4: allowing auger conveyor to dally, the picture that helical blade is irradiated with a laser position is repeatedly obtained, by step 3
Laser irradiating position helical blade is asked for rotate a circle the inswept volume of laser rays, after average V1Rotated as helical blade
The volume change of one week rear screw blade；
Step 5: when carrying out cereal conveying, because blade has certain gradient blade can be caused to block laser rays, therefore
Need the cereal not photographed by industrial camera carrying out mathematical modeling when volume calculates, to estimate volume.According to spiral transferring
Device material movement law is sent, a gradient can not formed by the cereal surface that camera photographs, takes blade each week to rotate and starts
Shi Ruogan continuous pictures, the pixel of the row of these pictures fixation is extracted, if height is hi, so it is put into some ordered series of numbers, will
Two groups of neighbouring ordered series of numbers, it is poor to subtract previous pixels tall with the latter ordered series of numbers, due to auger conveyor moving step sizes L=S/
(Ni- 1), carry out afterwards than be worth each row between slope value, after take the average of whole slopes approximately to obtain material table
Face slope k；So a pitch internal lobe can approximately be tried to achieve by triangle theorem and the parameter of auger conveyor body itself
The sectional area S of piece push cereal direction of advance front endtThe first width picture area is S when if blade rotates1(microsystem can be used
Obtain), irregular prism height h is drawn using cereal surface slope k and selection picture pixels relevant height, is so hidden
The volume of gear can be approximately written as
There is laser irradiated volume V Step 6: asking for blade according to step 2 and rotating a circlef, such blade rotates a circle defeated
Send volume of material Vi=Vf+Vt-V1, total flow
It is also an advantage of the present invention that laser optical method precision is high, and is applied to auger conveyor, surveying production for agricultural provides
One new measuring method.The progress such as volume, weight when gathering in grain transportation to defeated grain screw feeder grain transportation are high in real time
Effect measurement, measurement cereal volume is accurate, and measurement accuracy is high, and system setting is simple, has a wide range of application.
Described above is only the better embodiment to the present invention, not makees any formal limit to the present invention
System, any simple modification that every technical spirit according to the present invention is made to embodiment of above, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (4)
- A kind of 1. measuring method for auger conveyor mass flow, it is characterised in that：First to industrial camera and laser Demarcated, choose line laser datum line；With laser triangulation, auger conveyor transported material is shot by industrial camera When, the picture of the surface of material laser rays metamorphosis of line laser irradiation helical blade push, picture is handled in real time, The relation established between pictorial information and push mass flow；Dally auger conveyor, by image procossing, obtains the volume change that the helical blade sky of line laser irradiation position circles Change V1；When carrying out cereal transmission, the laser rays that cereal surface is radiated at by industrial camera acquisition line laser changes picture, processing Picture obtains the area S surrounded between curve and line laser datum linei；Simultaneously real-time statistics blade rotate a circle industrial camera bat Take the photograph picture number Ni, time ti, blade rotating cycle n, the blade cereal forward travel distance that rotates a circle is a pitch S；And calculate spiral When conveyer conveys material, Volume Changes V that the line laser that often rotates a circle is insweptf, drawn by mathematical modeling and do not clapped by camera The cereal volume V taken the photographt, and then obtain auger conveyor and rotate a circle the cereal volume V of pushi；Cumulative cumulative volume V.The industrial camera and laser are arranged close on the test desk of discharging opening side, line laser vertical irradiation helical feed Helical blade in device.
- 2. according to a kind of measuring method for auger conveyor mass flow described in claim 1, it is characterised in that：It is described
- 3. according to a kind of measuring method for auger conveyor mass flow described in claim 1, it is characterised in that：The Vt Computational methods：When carrying out cereal conveying, because blade has certain gradient blade can be caused to block laser rays, according to spiral Conveyer material movement law, a gradient can not formed by the cereal surface that camera photographs, take blade each week to rotate and open Some continuous pictures during the beginning, the pixel of the row of these pictures fixation is extracted, if height is hi, so it is put into some ordered series of numbers, By two groups of neighbouring ordered series of numbers, subtracted with the latter ordered series of numbers it is previous that pixels tall is poor, due to auger conveyor moving step sizes L=S/ (Ni- 1), carry out afterwards than be worth each row between slope value, after take whole slopes average can myopia obtain material table Face slope k；So a pitch internal lobe can approximately be tried to achieve by triangle theorem and the parameter of auger conveyor body itself The sectional area S of piece push cereal direction of advance front endtThe first width picture area is S when if blade rotates1, utilize cereal surface Slope k and the picture pixels relevant height of selection draw irregular prism height h, and the volume being so blocked can approximately be write For
- 4. according to a kind of measuring method for auger conveyor mass flow described in claim 1, it is characterised in that：The spiral shell Rotation conveyer rotates a circle the volume of material V of pushi, cumulative cumulative volume V：Vi=Vf+Vt-V1,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711090616.2A CN107860431B (en) | 2017-11-08 | 2017-11-08 | A kind of measurement method for auger conveyor mass flow |
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| CN201711090616.2A CN107860431B (en) | 2017-11-08 | 2017-11-08 | A kind of measurement method for auger conveyor mass flow |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115290A (en) * | 2018-04-09 | 2019-01-01 | 黑龙江八农垦大学 | A kind of corn mass flow sensor based on spiral elevator principle |
| CN109526365A (en) * | 2019-01-17 | 2019-03-29 | 南京农业大学 | A kind of measuring system and method for combine harvester grain flow |
| CN109632017A (en) * | 2018-12-26 | 2019-04-16 | 中民筑友科技投资有限公司 | A kind of rate of discharge detection method of concrete distributing equipment, apparatus and system |
| CN112067616A (en) * | 2020-09-28 | 2020-12-11 | 江苏大学 | Real-time detection device and method for grain quality |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115290A (en) * | 2018-04-09 | 2019-01-01 | 黑龙江八农垦大学 | A kind of corn mass flow sensor based on spiral elevator principle |
| CN109632017A (en) * | 2018-12-26 | 2019-04-16 | 中民筑友科技投资有限公司 | A kind of rate of discharge detection method of concrete distributing equipment, apparatus and system |
| CN109526365A (en) * | 2019-01-17 | 2019-03-29 | 南京农业大学 | A kind of measuring system and method for combine harvester grain flow |
| CN112067616A (en) * | 2020-09-28 | 2020-12-11 | 江苏大学 | Real-time detection device and method for grain quality |
| CN112067616B (en) * | 2020-09-28 | 2024-06-11 | 江苏大学 | Real-time detection device and method for grain quality |
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| CN107860431B (en) | 2019-08-02 |
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