CN117814203A - Online accurate mixing method of forestry aviation plant protection mixture based on jet flow - Google Patents
Online accurate mixing method of forestry aviation plant protection mixture based on jet flow Download PDFInfo
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- CN117814203A CN117814203A CN202410247602.0A CN202410247602A CN117814203A CN 117814203 A CN117814203 A CN 117814203A CN 202410247602 A CN202410247602 A CN 202410247602A CN 117814203 A CN117814203 A CN 117814203A
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- 238000002156 mixing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000203 mixture Substances 0.000 title claims description 14
- 239000003814 drug Substances 0.000 claims abstract description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 27
- 238000009792 diffusion process Methods 0.000 claims description 10
- 229940079593 drug Drugs 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 5
- 238000003809 water extraction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 230000001419 dependent effect Effects 0.000 abstract description 4
- 238000013178 mathematical model Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 9
- 239000012530 fluid Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000575 pesticide Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 241000238631 Hexapoda Species 0.000 description 3
- 241000607479 Yersinia pestis Species 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 206010059866 Drug resistance Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 239000010914 pesticide waste Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
The invention discloses an online accurate mixing method of forestry aviation plant protection mixing agents based on jet flow, which comprises the following steps: according to the input water-medicine ratio and the operation parameters acquired in real time, water and medicine with corresponding flow are taken and input into a mixing module; acquiring water flow data of the first flow sensor and medicine flow data from the second flow sensor, and when the water flow data or the medicine flow data are different from theoretical water flow or medicine flow, feeding back the data acquired in real time to the system, and adjusting the flow of clear water according to the opening angle of the spherical electromagnetic valve by the system, so that the water-medicine ratio of the medicine mixing system is accurate. Determining a medicine mixing ratio, inputting unit medicine application amount as a fixed value, setting operation height and speed as independent variables, setting the opening of a ball valve and the rotating speed of a peristaltic pump as dependent variables, changing the medicine flow and the clean water flow in the same proportion, further determining the relation between the independent variables, the dependent variables and the unit medicine application amount, establishing an online medicine mixing mathematical model, and meeting the requirement of accurate medicine mixing.
Description
Technical Field
The invention belongs to the technical field of forestry management, and particularly relates to an online precise mixing method of a forestry aviation plant protection mixture based on jet flow.
Background
In order to achieve the effective prevention and control effect of forestry diseases and insect pests, current disease and insect pest prevention and control of forestry mainly depend on chemical prevention and control, and pesticide application operation is needed to be carried out on a forest area. Traditional mechanized application can be divided into two types according to the process of mixing: manual premixing mode and on-line mixing mode. At present, manual medicine premixing is mainly adopted, and the operation quality is difficult to be ensured because of the defects of large error, low medicine mixing quality, pesticide waste, endangering staff and the like of a premixing mode.
The on-line chemical mixing mode is mainly divided into two major types, namely a jet type and an injection type, the jet type chemical mixer is one of the simplest and effective methods for realizing the on-line chemical-water separation and pesticide mixing, and the jet type chemical mixer belongs to unpowered parts and has the advantages of no faults, no blockage and the like.
The online chemical mixing mode mainly comprises online chemical mixing of a single medicament, the effect of plant protection is difficult to ensure, and the diseases, the insect pests and the weeds are easy to generate drug resistance, so that the development of a novel online accurate mixing method of the plant protection mixture is particularly important.
Disclosure of Invention
The invention aims to provide an online accurate mixing method of a forestry aviation plant protection mixing agent based on jet flow so as to solve the problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: a jet-type-based online precise mixing method for forestry aviation plant protection mixture comprises the following specific steps:
step one: parameter determination, water taking and medicine taking;
inputting the proportion of water and medicine according to the requirement, then pumping water with corresponding proportion from the water tank through the plunger pump, and simultaneously pumping medicine with corresponding proportion from the medicine tank through the peristaltic pump;
step two: actual data acquisition and adjustment:
(1) Detecting the flow of actual water through a first flow sensor arranged on the water extraction path, comparing data, and feeding the acquired data back to a computer when the comparison is different, wherein the opening angle is adjusted through a spherical electromagnetic valve arranged on the water extraction path so as to adjust the flow of clear water to adjust the water-medicine ratio;
(2) The method is similar to the adjustment of the flow rate of clear water, the flow rate of the actual medicine is detected according to a second flow sensor arranged on the medicine taking path, then data comparison is carried out, and when the comparison is different, the flow rate of the medicine is changed by adjusting the rotating speed of a peristaltic pump so as to realize the water-medicine proportion of the medicine mixing system;
step three: accurate mixing water medicine:
uniformly conveying the flow of the accurate water medicine after the detection in the second step to a jet medicine mixer for mixing;
the jet flow medicine mixer specifically comprises a double-suction medicine pipe, a water injection port is arranged at the head part of the jet flow medicine mixer, and a medicine liquid outlet is arranged at the tail part of the jet flow medicine mixer;
the jet flow medicine mixer is arranged in a jet flow mode and comprises a jet flow nozzle, a medicine suction pipe, a mixing chamber, a throat pipe and a diffusion pipe;
the jet nozzle is conical, and the convergence angle of the jet nozzleIs->Diameter is +.>；
The flow directions of the clean water and the sucked pesticide are as follows: the drug sucking tube is vertical and diagonal;
the mixing chamber is trapezoid, and the optimal nozzle distance；
The throat being of diameterCircular pipe section, throat diameter is generally +.>；
Throat length of throat；
The diffuser pipe has a conical shape with a minimum diameter not smaller than that of the throat pipeThe selection range of the diffusion angle beta is 7-15 degrees;
step four: and then spraying, filtering the water-medicine mixture mixed by the jet medicine mixer, and spraying the water-medicine mixture through a spray boom.
Preferably, in the second step, a first pressure sensor is arranged between the spherical electromagnetic valve and the jet flow medicine mixer, and a second pressure sensor is respectively arranged between the second flow sensor and the jet flow medicine mixer and between the third flow sensor and the jet flow medicine mixer.
Preferably, the medicine taking path in the second step comprises two peristaltic pumps, and the outlets of the two peristaltic pumps are respectively connected with the medicine sucking pipe I of the jet medicine mixer and the medicine injecting port of the medicine sucking pipe II of the jet medicine mixer.
Preferably, a first one-way valve is arranged between one peristaltic pump and the first flow sensor, the second one-way valve and the other peristaltic pump are arranged in the same way, and the peristaltic pumps and the flow sensors are respectively connected with the control module (namely, the computer).
Preferably, the water tank is provided with a first liquid level sensor, the two medicine tanks are respectively provided with a second liquid level sensor and a third liquid level sensor, and the liquid level sensors are respectively connected with the control module.
The invention has the technical effects and advantages that: determining a medicine mixing ratio, inputting unit medicine application amount as a fixed value, setting operation height and speed as independent variables, setting the opening of a ball valve and the rotating speed of a peristaltic pump as dependent variables, changing the medicine flow and the clean water flow in the same proportion, further determining the relation between the independent variables, the dependent variables and the unit medicine application amount, establishing an online medicine mixing mathematical model, and meeting the requirement of accurate medicine mixing. The invention can meet the requirement of accurate dispensing, ensures good mixing effect and has the characteristics of high economy and pesticide residue reduction.
Drawings
FIG. 1 is a schematic structural view of a jet mixer;
FIG. 2 is an overall block diagram of a jet type compounding device;
figure 3 is a frame flow chart of the online precise mixing method of the forestry aviation plant protection mixture based on jet flow.
In fig. 1: 15. a first medicine suction tube; 16. a mixing chamber; 17. a throat; 18. a diffusion tube; 19. a shrink tube; 20. a second drug sucking tube;
in fig. 2: 1. a computer; 2. a human-computer interaction interface; 301. a first liquid level sensor; 302. a second liquid level sensor; 303. a third liquid level sensor; 4. a water tank; 5. a medicine box; 601. a first peristaltic pump; 602. a second peristaltic pump; 7. a plunger pump; 801. a first flow sensor; 802. a second flow sensor; 803. a third flow sensor; 9. a one-way valve; 901. a first one-way valve; 902. a second one-way valve; 903. a third one-way valve; 10. a first pressure sensor; 101. a second pressure sensor; 11. a spherical solenoid valve; 12. a jet mixer; 13. a filter valve; 14. a spray bar.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an online accurate mixing method of a forestry aviation plant protection mixed agent based on jet type, which is realized by jet type mixed agent mixing equipment (an overall structure diagram is shown in figure 2, solid line connection is real object pipeline connection in figure 2, and broken line connection is circuit wire connection), wherein the jet type mixed agent mixing equipment comprises a water taking module, a medicine taking module I, a medicine taking module II, a mixing module (shown in figure 1), a spraying module and a control module respectively connected with the water taking module, the medicine taking module I and the medicine taking module II;
the control component controls the water taking module, the first medicine taking module and the second medicine taking module to input clear water and medicine into the mixing module according to the flow matched with the operation height and speed;
relation between working height and speed and hectare application rate:；
in the method, in the process of the invention,-spraying a web, m; />-voyage high, m; />Gravitational acceleration, m/s 2 ；/>The horizontal speed, namely the linear speed, m/min when the liquid medicine leaves the spray head; />Boom length, m.
Wherein, C-hectare is applied with the dosage;valve outlet area, m 2 ；/>-flow rate of the liquid medicine, m/min; />-speed, km/h; />-time of administration, min.
The outlet pipe of the water taking module is connected into the mixing module through the water injection port, the medicine outlet pipes of the medicine taking module I and the medicine taking module II are connected into the mixing module through the medicine suction pipe, and the water injection port and the medicine suction pipe are arranged at one end of the mixing module in an angle mode so that clear water and medicines are mixed in the mixing chamber 16 of the mixing module and then output from the diffusion pipe 18 at the other end of the mixing module.
As a further improvement of the mixing method of the present invention:
the mixing module is provided with a double-suction medicine pipe, the water injection port is arranged at the head of the mixing module, and the medicine liquid outlet is arranged at the tail of the mixing module.
The mixing module is in jet type and consists of a jet nozzle, a medicine suction pipe, a mixing chamber 16, a throat pipe 17 and a diffusion pipe 18;
the jet nozzle is conical, and the convergence angle of the jet nozzleIs->Diameter is +.>；
The flow directions of the clean water and the sucked pesticide are as follows: the medicine suction pipe is vertical and diagonal, and the embodiment adopts a vertical medicine suction pipe;
the mixing chamber 16 has a trapezoidal shape, and the optimum nozzle is spaced from the nozzle and throat 17；
The throat 17 is of diameterCircular pipe section, throat 17 diameter is generally +.>The present embodiment selects；
According to the jet pump theory, the length of the throat is too short, so that the fluid cannot be uniformly mixed, the flow velocity distribution at the outlet of the throat is very uneven, and the diffusion loss is increased. Conversely, the excessive throat length increases friction resistance loss, and experiments show that the optimal throat length of the liquid jet pumpThe throat of the throat 17 of this embodiment is +.>；
The diffuser 18 has a conical shape with a minimum diameter not smaller than the diameter of the throat 17The diffusion angle beta is selected to be 7-15 degrees, and the diffusion angle beta selected in the embodiment is 8 degrees;
flow ratioIs the ratio of the volume flow to the water volume flow of the medicament, i.e
；
Wherein:
-the volumetric flow rate of the working liquid, the volumetric flow rate of the imbibed bodies b, c;
-mass flow of mixed liquid, imbibed body b, c; />-density of the imbibed body b, c and the working liquid; determining a flow ratio and simultaneously determining the concentration of the mixed liquid;
pressure ratioIs a dimensionless parameter of the pressure loss of the reaction jet flow medicine mixing device, namely
；
Wherein:-total pressure of the mixed liquor;-total pressure absorbed; />-total pressure of the working fluid; />-mixer outlet pressure; />、/>-the pressure of the drug suction ports b, c of the drug mixer; />-mixer working fluid inlet pressure; />-average mixer outlet speed; />Drug sucking mouth of drug mixer>Average speed; />-the average speed of the mixer working fluid inlet; the outlet pressure determines the range of the spray head and the size of the fog drop;
area ratioRefers to the ratio of the cross-sectional area of the mixing tube to the cross-sectional area of the nozzle, i.e
；
Wherein:-mixing tube and jet nozzle outlet cross-sectional area; />-throat 17 diameter and jet nozzle outlet diameter;
as shown in fig. 3, the water intake module includes a first flow sensor 801, and the medicine intake module includes a second flow sensor 802 and a third flow sensor 803; the control module acquires water flow data from the first flow sensor 801 and medicine flow data from the second flow sensor 802 and the third flow sensor 803, and adjusts water flow of the water taking module and medicine flow of the first medicine taking module and the second medicine taking module in a feedback mode according to the working parameters acquired in real time and the input medicine mixing ratio;
the water taking module comprises a water tank 4, a plunger pump 7 and a first one-way valve 901; the plunger pump 7 outputs water of the water tank 4 to a pipeline, and the pressure regulating valve is communicated with the medicine mixing unit through a water filling port; the first flow sensor 801 is arranged on a pipeline between the plunger pump 7 and the first pressure sensor 10 and is connected with a control module, the first pressure sensor 10 is arranged between the spherical electromagnetic valve 11 and the jet flow medicine mixer 12, the second pressure sensor 101 is respectively arranged between the second flow sensor 802 and the jet flow medicine mixer 12 and between the third flow sensor 803 and the jet flow medicine mixer 12, and the control module is connected with a control end of the spherical electromagnetic valve 11;
the medicine injection pump is a peristaltic pump, the first peristaltic pump 601 and the second peristaltic pump 602 have the functions of controlling the medicine liquid injection amount and isolating clean water from the medicine box 5, the outlet of the first peristaltic pump 601 is connected with the medicine injection port of the first medicine suction pipe 15 of the mixing module, and the outlet of the second peristaltic pump 602 is connected with the medicine injection port of the second medicine suction pipe 20 of the mixing module;
a second check valve 902 is disposed between the second peristaltic pump 602 and the second flow sensor 802; the peristaltic pump and the flow sensor are respectively connected with a control module, the control module is connected with the control end of the peristaltic pump, and the plunger pump 7 and the third one-way valve 903 are the same as those described above;
the water tank 4 is provided with a first liquid level sensor 301, the medicine tank 5 is provided with a second liquid level sensor 302 and a third liquid level sensor 303, and the liquid level sensors are respectively connected with the control module;
according to the input water-medicine ratio and the operation parameters acquired in real time, water and medicine with corresponding flow are taken and input into a mixing module;
further, determining the relation between the opening of the spherical electromagnetic valve 11 and the flow rate of clear water;
flow rate of clear waterIs added with the flow of the medicament>、/>The mixing ratio of the two medicines can be adjusted according to different medicine liquid mixing ratios;
the calculation formula of the clear water flow, namely the ball valve outflow flow, is as follows:
；
wherein,-a fluid outflow flow rate coefficient; />-coefficient of shrinkage; />-valve port flow area; />-ball valve inlet-outlet pressure difference, MPa; />Fluid density, kg/m 3 The density of the clean water is 998kg/m 3 。
The fluid outflow flow rate coefficient can be obtained according to literature fluid mechanics and fluid machinery:
；
wherein:-local drag coefficient.
According to literature fourth volume of mechanical design handbook:
；
wherein:-inlet cross-sectional area.
Gate flow coefficient of contractionThe evaluation can be performed by the method of Confucius theory analysis, as shown in Table 1:
table 1 coefficient of contraction corresponding to modelValue of
From MATLAB fitting, the shrinkage factor can be obtainedProjection of maximum displacement of the edge of the spherical electromagnetic valve>And the radius of the pipeline of the spherical electromagnetic valve is->The relation of the ratio of (2) is as follows:
；
spherical solenoid valve edge maximum displacement projectionOpening size->Is the relation of:
；
the calculation formula of the differential pressure between the inlet and the outlet of the ball valve is as follows:
；
in the method, in the process of the invention,-valve inlet pressure; />Valve outlet pressure.
Relation between opening size of ball valve and clear water flow:
；
according to the collected operation parameters and the like, the required clear water flow is determined, the angle of the spherical electromagnetic valve 11 is accurately regulated, and the medicine dispensing is accurate.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (5)
1. An online accurate mixing method of forestry aviation plant protection mixture based on jet type is characterized in that: the method comprises the following specific steps:
step one: parameter determination, water taking and medicine taking;
according to the ratio of the water to the medicine, the water with the corresponding ratio is pumped from the water tank (4) through the plunger pump (7), and the medicine with the corresponding ratio is pumped from the medicine tank (5) through the peristaltic pump;
step two: actual data acquisition and adjustment:
(1) Detecting the flow of actual water through a first flow sensor (801) arranged on the water extraction path, comparing data, and feeding the acquired data back to a computer (1) when the difference occurs in comparison, wherein the opening angle is adjusted through a spherical electromagnetic valve (11) arranged on the water extraction path so as to adjust the flow of clear water, so that the water-medicine ratio is adjusted;
(2) The method is similar to the adjustment of the flow rate of clear water, the flow rate of actual medicines is detected according to a second flow sensor (802) arranged on a medicine taking path, then data comparison is carried out, and when the comparison is different, the flow rate of the medicines is changed by adjusting the rotating speed of a peristaltic pump so as to realize the water-medicine ratio of the medicine mixing system;
step three: accurate mixing water medicine:
uniformly conveying the flow of the accurate water medicine after the adjustment and detection in the second step to a jet medicine mixer (12) for mixing;
the jet flow medicine mixer (12) comprises a double-suction medicine pipe, a water injection port is arranged at the head of the jet flow medicine mixer (12), and a medicine liquid outlet is arranged at the tail of the jet flow medicine mixer (12);
the jet flow medicine mixer (12) is arranged in a jet flow mode, and the jet flow medicine mixer (12) comprises a jet flow nozzle, a medicine suction pipe, a mixing chamber (16), a throat pipe (17) and a diffusion pipe (18);
the jet nozzle is conical and has a convergence angleIs->Diameter is +.>；
The mixing chamber (16) is trapezoid, and the nozzle distance is equal to；
The throat (17) has a diameter ofThe diameter of the circular pipe section and the throat pipe (17) is +.>；
Throat length of throat (17)；
The diffuser pipe (18) is conical, and the minimum diameter thereof is not smaller than the diameter of the throat pipe (17)The selection range of the diffusion angle beta is 7-15 degrees;
step four: and then the water-medicine mixture mixed by the jet medicine mixer (12) is filtered and sprayed out by the spray rod (14).
2. The online accurate mixing method of the forestry aviation plant protection mixture based on jet flow according to claim 1, which is characterized by comprising the following steps: in the second step, a first pressure sensor (10) is arranged between the spherical electromagnetic valve (11) and the jet flow medicine mixer (12), and a second pressure sensor (101) is respectively arranged between the second flow sensor (802) and the jet flow medicine mixer (12) and between the third flow sensor (803) and the jet flow medicine mixer (12).
3. The online accurate mixing method of the forestry aviation plant protection mixture based on jet flow according to claim 1, which is characterized by comprising the following steps: the medicine taking path in the second step comprises two peristaltic pumps, and the outlets of the two peristaltic pumps are respectively connected with a medicine sucking pipe I (15) of the jet medicine mixer (12) and a medicine injecting port of a medicine sucking pipe II (20) of the jet medicine mixer.
4. A jet-type-based online precise mixing method for forestry aviation plant protection mixture according to claim 3, wherein the method comprises the following steps: a first one-way valve (901) is arranged between one peristaltic pump and a first flow sensor (801), a second one-way valve (902) is arranged in the same way as the other peristaltic pump, and a plurality of peristaltic pumps and a plurality of flow sensors are respectively connected with a control module.
5. The online accurate mixing method of the forestry aviation plant protection mixture based on jet flow according to claim 1, which is characterized by comprising the following steps: the water tank (4) is provided with a first liquid level sensor (301), the two medicine boxes (5) are respectively provided with a second liquid level sensor (302) and a third liquid level sensor (303), and the liquid level sensors are respectively connected with the control module.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2010010A1 (en) * | 1989-02-16 | 1990-08-16 | Karl L. Nau | Device for applying plant-protecting compositions |
| CN103004735A (en) * | 2012-12-31 | 2013-04-03 | 江苏大学 | Vehicle-mounted pesticide mixing device |
| CN109224904A (en) * | 2018-10-30 | 2019-01-18 | 湖南农业大学 | Medicament-mixing device and mixed prescription method based on Multi-point jetting type |
| CN112483478A (en) * | 2020-11-13 | 2021-03-12 | 西安航天动力试验技术研究所 | Medium jet pressurizing supply device and manufacturing method |
| CN112776985A (en) * | 2021-01-21 | 2021-05-11 | 安徽农业大学 | Variable pesticide application control method for forestry aviation helicopter |
| CN112827661A (en) * | 2020-12-29 | 2021-05-25 | 内蒙古黄陶勒盖煤炭有限责任公司 | Intelligent medicine dispensing system |
| CN115328220A (en) * | 2022-07-18 | 2022-11-11 | 埃森农机常州有限公司 | Quantitative control system of plant protection machine |
-
2024
- 2024-03-05 CN CN202410247602.0A patent/CN117814203A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2010010A1 (en) * | 1989-02-16 | 1990-08-16 | Karl L. Nau | Device for applying plant-protecting compositions |
| CN103004735A (en) * | 2012-12-31 | 2013-04-03 | 江苏大学 | Vehicle-mounted pesticide mixing device |
| CN109224904A (en) * | 2018-10-30 | 2019-01-18 | 湖南农业大学 | Medicament-mixing device and mixed prescription method based on Multi-point jetting type |
| CN112483478A (en) * | 2020-11-13 | 2021-03-12 | 西安航天动力试验技术研究所 | Medium jet pressurizing supply device and manufacturing method |
| CN112827661A (en) * | 2020-12-29 | 2021-05-25 | 内蒙古黄陶勒盖煤炭有限责任公司 | Intelligent medicine dispensing system |
| CN112776985A (en) * | 2021-01-21 | 2021-05-11 | 安徽农业大学 | Variable pesticide application control method for forestry aviation helicopter |
| CN115328220A (en) * | 2022-07-18 | 2022-11-11 | 埃森农机常州有限公司 | Quantitative control system of plant protection machine |
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