CN108459213B - Aviation plant protection electrostatic spray fog drop charge-to-mass ratio detection test bed - Google Patents
Aviation plant protection electrostatic spray fog drop charge-to-mass ratio detection test bed Download PDFInfo
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- CN108459213B CN108459213B CN201810322387.0A CN201810322387A CN108459213B CN 108459213 B CN108459213 B CN 108459213B CN 201810322387 A CN201810322387 A CN 201810322387A CN 108459213 B CN108459213 B CN 108459213B
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- 239000007921 spray Substances 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 claims abstract description 29
- 239000010949 copper Substances 0.000 claims abstract description 29
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 19
- 241000196324 Embryophyta Species 0.000 description 15
- 239000003595 mist Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 241000238631 Hexapoda Species 0.000 description 3
- 241000607479 Yersinia pestis Species 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000575 pesticide Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Catching Or Destruction (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to an aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test bed, which comprises a net charge-to-mass ratio collection box and a water collecting tank, wherein the upper port of the net charge-to-mass ratio collection box is open, a plurality of layers of copper nets are arranged in the net charge-to-mass ratio collection box, each layer of copper net is provided with a bottom net, the plurality of layers of copper nets are sleeved layer by layer, the plurality of layers of copper nets are more and more dense from inside to outside, each layer of copper net is provided with a temperature and humidity sensor, the lower part of the net charge-to-mass ratio collection box is provided with the water collecting tank, the water collecting tank is closed, and the net charge-to-mass ratio collection box is communicated with the water collecting tank; the electrostatic spraying system comprises an electrostatic generator and an electrostatic spray head, and the electrostatic spray head is arranged right above the net-shaped charge-to-mass ratio collecting box; each temperature and humidity sensor is connected to a single-chip microcomputer, the single-chip microcomputer is connected with a computer, the Pian meter is connected with a net-shaped charge-to-mass ratio collecting box, and the Pian meter is also connected with the computer. The invention improves the accuracy of current measurement.
Description
Technical Field
The invention relates to an aviation plant protection mechanical property detection test bed, in particular to an aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test bed.
Background
The agricultural aviation technology has obvious effect in the prevention and control aspects of sudden and burst diseases and insect pests, solves the problem that agricultural machinery or manpower cannot enter the ground, and has a development prospect highly valued by experts in the field of agricultural plant protection. The operation area of the fixed wing and the helicopter is over 200 ten thousand hectares, and the popularization and application of the agricultural aviation plant protection technology are one of important ways for replacing manpower and improving the comprehensive capacity of agricultural production. Different from the large-capacity spraying characteristics of the ground boom sprayer, the amount of the pesticide applied by the aviation plant protection should be controlled between 4.5 and 7.5L/hm 2 The low-volume spray and the ultra-low-volume spray belong to the low-volume spray, so that the particle size of the fog drops to be adopted is finer, and the fine fog drops are pressed down under rotor pulp and drift can be generated due to the disturbance effect of air flow. The electrostatic spraying technology can better spray the liquid medicine on plants to improve agricultureThe utilization rate of the pesticide reduces the environmental pollution and the pesticide residue. The charged fog drops generated by the electrostatic spraying technology are adsorbed on the surfaces of plant leaves due to the electrostatic action, so that the probability of the contact of the medicine with the plant diseases and insect pests is remarkably increased, and the control effect of the plant diseases and insect pests is improved by times. Under the action of static electricity, the formed fog drops have small particle size, good uniformity, strong penetrability and high hit rate to a target. The electrostatic spraying technology greatly reduces environmental pollution and improves food safety.
The electrostatic spraying technology is a multi-disciplinary technology, belongs to the field of charged particle two-phase flow in which charged fog drops move in a medium, and is a charged fog drop flow field system with comprehensive action of an electric field and a flow field and certain initial conditions and boundary conditions, wherein the charge condition of fog drops is always in a key position, and basic data can be provided for researching the charge fog drop flow field of groups and establishing a dynamic characteristic and a flow form mathematical model of the charged particle two-phase flow only by exactly researching the charge condition of fog drops, so as to guide the research of the development of electrostatic spraying equipment and the research of the electrostatic spraying control effect. During aviation electrostatic spraying operation, the flying height of the aircraft is higher, pesticide fog drops can drift due to the influence of an airflow field in the sedimentation process, evaporation loss is caused due to the influence of temperature and humidity, and the charge quantity of the electrostatic fog drops is attenuated due to the influence of the spraying height, so that the method has very important significance in detecting the charge-to-mass ratio of the fog drops in different environments.
The existing aviation plant protection electrostatic spray fog drop charge-to-mass ratio detection test bed comprises a fog drop collection net box, an electrostatic spray system and a universal meter, wherein a single-layer copper net is arranged inside the fog drop collection net box, the single-layer copper net is matched with a metal bracket to be bundled through metal wires, and when in measurement, the current measurement value is small due to the fact that charged fog drops splash out of the net box, meanwhile, the resistance of the traditional test net box is large, and the problem that current measurement is inaccurate is caused. In addition, the traditional fog drip collection net cage wiring mode adopts the universal meter to directly link to each other with the net cage, and universal meter measurement accuracy is limited, and the error is great, and the function is single.
Disclosure of Invention
The invention aims to provide an aviation plant protection electrostatic spray mist droplet charge-to-mass ratio detection test bed which is used for solving the problem of inaccurate measurement of a traditional mist droplet collecting net cage.
The technical scheme adopted for solving the technical problems is as follows: the aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test bed comprises a netlike droplet collector, an electrostatic spray system, a singlechip, a picoampere meter and a computer, wherein the netlike droplet collector comprises a netlike charge-to-mass ratio collecting box and a collecting tank, the upper port of the netlike charge-to-mass ratio collecting box is open, a plurality of layers of copper nets are arranged in the netlike charge-to-mass ratio collecting box, each layer of copper net is provided with a bottom net, the plurality of layers of copper nets are coaxially sleeved layer by layer, the plurality of layers of copper nets are more and more dense from inside to outside, each layer of copper net is provided with a temperature and humidity sensor, the lower part of the netlike charge-to-mass ratio collecting box is provided with the collecting tank, the collecting tank is closed, and the netlike charge-to-mass ratio collecting box is communicated with the collecting tank; the electrostatic spraying system comprises an electrostatic generator and an electrostatic spray head, wherein the electrostatic spray head is arranged right above the net-shaped charge-to-mass ratio collecting box, and the scale is arranged on the upper edge of the net-shaped charge-to-mass ratio collecting box; each temperature and humidity sensor is connected to the singlechip, and the output data line of singlechip is connected with the computer, and the measuring line of Pian table is connected with netted charge-mass ratio collecting box, and the output data line of Pian table is connected with the computer.
In the scheme, three layers of copper nets are arranged in the net-shaped charge-to-mass ratio collecting box.
The net-shaped charge-to-mass ratio collecting box in the scheme is a box body with an open upper port, which is formed by welding a white steel plate through argon arc welding, and the adoption of the white steel section bar can reduce the resistivity, effectively solve the problem of inaccurate current measurement caused by large resistance of the traditional test net box, ensure the stability of the structure and can be repeatedly used for a long time.
According to the scheme, the water guide groove is formed in the bottom of the net-shaped charge-to-mass ratio collecting box and is connected with the inner wall of the net-shaped charge-to-mass ratio collecting box through the inclined water guide plate, the water guide groove is communicated with the water collecting groove, and the water collecting groove is of an inverted trapezoid shape, so that mist drops can be prevented from directly splashing on the ground, on one hand, the mist drops can be recycled, and on the other hand, the test environment can be improved.
In the scheme, the electrostatic spray head is connected with the electrostatic generator through a pipeline, the upper side of the electrostatic generator is connected with the lower side of the pressure gauge through a pipeline, the upper side of the pressure gauge is connected with the outlet of the water pump, and the inlet of the water pump is connected with the medicine chest.
According to the scheme, the middle bottom net is a height-adjustable net bottom, and the bottom net is connected with the corresponding net wall through the height adjusting device so as to adjust the distribution of three layers of copper nets inside.
The invention has the following beneficial effects:
1. the net-shaped charge-to-mass ratio collecting box is provided with three layers of fog drop collecting nets, and can effectively prevent the small-particle-size charged fog drops from penetrating through the test collecting nets, so that the current measurement accuracy is improved. In addition, the distance between the bottom surface of the fog drop collecting net and the spray head is adjustable, and when the fog drop collecting net is used alone, the change of the height of the crop canopy can be simulated to calculate the change of the charge-mass ratio of the fog drops, so that the change along with the spray height is analyzed to analyze the charge-mass attenuation law of the fog drops.
2. The invention is provided with the net-shaped charge-to-mass ratio collecting box, the box body formed at the periphery and the bottom of the net-shaped charge-to-mass ratio collecting box can prevent part of charged mist drops from escaping from the mist collecting device, the current measured value is prevented from being smaller due to the fact that the charged mist drops splash out of the net box, and meanwhile, the whole frame size of the net-shaped charge-to-mass ratio collecting box can be enlarged, and the problem that the internal space of a traditional test net box is small is solved. In addition, the static spray head with larger spray width and larger flow can be used for measuring.
3. According to the invention, the DHT11 type temperature and humidity sensor, the STC89C52 type singlechip, the Pian meter and the computer are combined and applied, so that on one hand, the calculated charge-to-mass ratio value and real-time temperature and humidity data can be displayed on computer software, and the problem of large measurement error caused by weak mist charging signals and unstable electric signals is solved. On the other hand, the numerical value of the charge-to-mass ratio of the fog drops of different spray heads under different working heights and different working temperature and humidity environments can be measured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a three-dimensional frame diagram of a mesh charge-to-mass ratio collection box in accordance with the present invention.
Fig. 3 is a left side view of the mesh charge-to-mass ratio collection box of the present invention.
Fig. 4 is a top view of a mesh charge-to-mass ratio collection box of the present invention.
Fig. 5 is a front view of a mesh charge-to-mass ratio collection tank in accordance with the present invention.
In the figure: 1. 2 parts of a medicine box, 3 parts of a water pump, 4 parts of a pressure gauge, 5 parts of an electrostatic generator, 6 parts of an electrostatic spray head, 7 parts of a scale, 8 parts of a netlike charge-mass ratio collecting box, 9 parts of a copper net, 10 parts of a water collecting tank, 11 parts of a picoampere meter, 12 parts of a temperature and humidity sensor, 12 parts of a computer, 13 parts of a single-chip microcomputer
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the aviation plant protection electrostatic spray mist droplet charge-to-mass ratio detection test bed comprises a netlike mist droplet collector, an electrostatic spray system, a singlechip 13, a temperature and humidity sensor 11, a Pian meter 10 and a computer 12. The netlike fog drip collector comprises a netlike charge-to-mass ratio collecting box 7 and a water collecting tank 9; the water collecting tank 9 is an inverted trapezoid water tank with an opening at the upper part, the net-shaped charge-to-mass ratio collecting tank 7 is a white steel square tank formed by argon arc welding, the water collecting tank 9 is arranged below the net-shaped charge-to-mass ratio collecting tank 7, a water guide tank is arranged at the inner bottom of the net-shaped charge-to-mass ratio collecting tank 7, a water through hole is formed at the lower end of the water guide tank, the water through hole is communicated with the water collecting tank 9, and the water collecting tank 9 is airtight; a multi-layer copper net 8 is arranged in the netlike charge-mass ratio collecting box 7, the three layers of copper nets 8 are adopted in the embodiment, and the copper nets 8 are brass nets; the electrostatic spraying system consists of an electrostatic generator 4 and an electrostatic spray head 5; the electrostatic spray head 5, the electrostatic generator 4 and the pressure gauge 3 are communicated through pipelines, the upper side of the electrostatic spray head 5 is connected with the lower side of the electrostatic generator 4 through pipelines, the upper side of the electrostatic generator 4 is connected with the lower side of the pressure gauge 3 through pipelines, the upper side of the pressure gauge 3 is connected with the outlet of the water pump 2, and the inlet of the water pump 2 is connected with the medicine chest 1. Each layer of copper net 8 in the netlike charge-mass ratio collecting box 7 is provided with a temperature and humidity sensor 11, all temperature and humidity sensors 11 are connected to a singlechip 13, and an output data line of the singlechip 13 is connected with a computer 12. The upper edge of the net-shaped charge-to-mass ratio collecting box 7 is provided with a scale 6, a measuring line of the Pitaan meter 10 is connected with the net-shaped charge-to-mass ratio collecting box 7, and an output data line of the Pitaan meter 10 is connected with a computer 12. The temperature and humidity sensor is used for measuring the real-time temperature and humidity inside the box body.
As shown in fig. 2, 3, 4 and 5, in the present invention, three brass nets with adjustable bottoms and different mesh numbers are adopted in the net-shaped charge-to-mass ratio collecting box 7, the three brass nets 8 are more densely meshed as they go to the outside, and the outer frame size of the net-shaped charge-to-mass ratio collecting box 7 is as follows: length x width x height = 1200 x 1200; first layer copper mesh 8 (inner layer) mesh number 0.5 mm=500 um=35 mesh, bottom mesh: 900 x 900 (up-down adjustable range 0-450), side net: 900 x 450 (non-adjustable); second layer copper mesh 8 (middle layer) mesh number 0.18 mm=180 um=80 mesh, bottom mesh: 1000×1000 (up-down adjustable range 450-900), side net: 1000 x 450 (non-adjustable); the mesh number of the third layer copper mesh 8 (outer layer) is 0.09 mm=90 um=180 mesh, the bottom mesh: 1100×1100 (up-down adjustable range 900-1000) sidenet: 1100 x 450 (not adjustable).
Unlike the traditional single-layer metal net and metal support, the net-shaped charge-to-mass ratio collecting box 7 is formed by welding white steel sections through argon arc welding, the periphery and the bottom surface are in a fully-closed state except the upper opening, the sealing material is a white steel plate with extremely high conductivity, and insulation treatment is performed between the sealing material and the outside during operation. The overall frame size of the net-shaped charge-to-mass ratio collection box 7 becomes larger, while the internal space of the conventional test net box is small.
The working process of the invention is as follows:
after being sprayed out by the electrostatic spray head, the electrostatic fog drops reach the fog drop collector, the picometer 10 measures the real-time current value of the fog drops in the collector, the real-time data are led into the computer 12 through the data wire to carry out statistical calculation to obtain an average value, and meanwhile, the temperature and humidity sensor 11 arranged in the collector transmits temperature and humidity data signals to the computer 12 through the singlechip 13. The change of the charge-to-mass ratio of the mist droplets with the change of the temperature and humidity and the kind of the spray head is displayed by the computer 12. And finding out the internal relation among the temperature, humidity, spray height, spray pressure, charging voltage, spray head structural parameters and the fog drop charging effect during aviation plant protection operation according to the test result.
The invention is used for testing the detection test bed of the charge-to-mass ratio of the fog drops sprayed by various electrostatic spray heads which are currently existing or are to be developed in the future, and judges the charging effect of the electrostatic spray heads on the fog drops from the angle of the charge-to-mass ratio of the fog drops, thereby having great significance for improving the structure of the electrostatic spray heads and enhancing the charging effect in the next step.
Claims (6)
1. The utility model provides an aviation plant protection static spraying fog droplet charge-to-mass ratio detects test bench which characterized in that: the aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test bed comprises a netlike droplet collector, an electrostatic spray system, a singlechip (13), a peace meter (10) and a computer (12), wherein the netlike droplet collector comprises a netlike charge-to-mass ratio collecting box (7) and a collecting tank (9), an upper port of the netlike charge-to-mass ratio collecting box (7) is open, a plurality of layers of copper nets (8) are arranged in the netlike charge-to-mass ratio collecting box (7), each layer of copper net (8) is provided with a bottom net, the plurality of layers of copper nets (8) are coaxially sleeved layer by layer, the plurality of layers of copper nets (8) are more and more densely sleeved from inside to outside, a temperature and humidity sensor (11) is arranged on each layer of copper net (8), the lower part of the netlike charge-to-mass ratio collecting box (7) is provided with the collecting tank (9), and the netlike charge-to-mass ratio collecting box (7) is closed; the electrostatic spraying system comprises an electrostatic generator (4) and an electrostatic spray head (5), wherein the electrostatic spray head (5) is arranged right above the net-shaped charge-to-mass ratio collecting box (7), and the scale (6) is arranged on the upper edge of the net-shaped charge-to-mass ratio collecting box (7); each temperature and humidity sensor (11) is connected to a single chip microcomputer (13), an output data line of the single chip microcomputer (13) is connected with a computer (12), a measuring line of Pi Anbiao (10) is connected with a net-shaped charge-mass ratio collecting box (7), and an output data line of the Pian meter (10) is connected with the computer (12).
2. The aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test stand of claim 1, wherein: three layers of copper nets (8) are arranged in the net-shaped charge-to-mass ratio collecting box (7).
3. The aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test stand of claim 2, wherein: the net-shaped charge-to-mass ratio collecting box (7) is a box body with an open upper port, which is formed by welding a white steel plate through argon arc welding.
4. The aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test stand of claim 3, wherein: the bottom of the net-shaped charge-to-mass ratio collecting box (7) is provided with a water guide groove, the water guide groove is connected with the inner wall of the net-shaped charge-to-mass ratio collecting box (7) through an inclined water guide plate, the water guide groove is communicated with the water collecting groove (9), and the water collecting groove (9) is in an inverted trapezoid shape.
5. The aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test stand of claim 4, wherein: the electrostatic spray head (5) is connected with the electrostatic generator (4) through a pipeline, the upper side of the electrostatic generator (4) is connected with the lower side of the pressure gauge (3) through a pipeline, the upper side of the pressure gauge (3) is connected with the outlet of the water pump (2), and the inlet of the water pump (2) is connected with the medicine chest (1).
6. The aviation plant protection electrostatic spray droplet charge-to-mass ratio detection test stand of claim 5, wherein: the bottom net is a height-adjustable net bottom, and is connected with the corresponding net wall through a height adjusting device so as to adjust the distribution of three layers of copper nets inside.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810322387.0A CN108459213B (en) | 2018-04-11 | 2018-04-11 | Aviation plant protection electrostatic spray fog drop charge-to-mass ratio detection test bed |
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| CN201810322387.0A CN108459213B (en) | 2018-04-11 | 2018-04-11 | Aviation plant protection electrostatic spray fog drop charge-to-mass ratio detection test bed |
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| CN108459213A CN108459213A (en) | 2018-08-28 |
| CN108459213B true CN108459213B (en) | 2024-01-30 |
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| CN109975623B (en) * | 2019-03-15 | 2020-12-18 | 江苏大学 | Electrostatic atomization nozzle charge-to-mass ratio measuring system and measuring method thereof |
| CN113267357B (en) * | 2021-04-14 | 2022-03-01 | 深圳远荣智能制造股份有限公司 | Life testing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203249970U (en) * | 2013-03-01 | 2013-10-23 | 江苏大学 | Non-contact electrostatic spraying charge-to-mass ratio measuring device |
| CN207937521U (en) * | 2018-04-11 | 2018-10-02 | 黑龙江八一农垦大学 | Aviation plant protection electrostatic spray droplet charge-mass ratio Detecting data |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050139239A1 (en) * | 2003-10-13 | 2005-06-30 | Prae Gary L. | Electrostatic hand cleanser apparatus and method of use |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203249970U (en) * | 2013-03-01 | 2013-10-23 | 江苏大学 | Non-contact electrostatic spraying charge-to-mass ratio measuring device |
| CN207937521U (en) * | 2018-04-11 | 2018-10-02 | 黑龙江八一农垦大学 | Aviation plant protection electrostatic spray droplet charge-mass ratio Detecting data |
Non-Patent Citations (1)
| Title |
|---|
| 荷质比对荷电雾滴沉积分布影响的初步研究;徐晓军;吴春笃;杨超珍;;农机化研究(11);全文 * |
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