CN105594679A - Precise variable mist-spraying test device based on or including electric pump rotating speed regulation - Google Patents
Precise variable mist-spraying test device based on or including electric pump rotating speed regulation Download PDFInfo
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- CN105594679A CN105594679A CN201610100536.XA CN201610100536A CN105594679A CN 105594679 A CN105594679 A CN 105594679A CN 201610100536 A CN201610100536 A CN 201610100536A CN 105594679 A CN105594679 A CN 105594679A
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- spray
- sensor
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0025—Mechanical sprayers
- A01M7/0032—Pressure sprayers
- A01M7/0042—Field sprayers, e.g. self-propelled, drawn or tractor-mounted
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0089—Regulating or controlling systems
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Spray Control Apparatus (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The invention provides a precise variable mist-spraying test device based on or including electric pump rotating speed regulation. By means of the test device, cost of a variable mist-spraying device can be effectively lowered, quality of variable mist spraying operation can be improved, and application of precise variable mist spraying to practical production is promoted. The test device comprises a mist-spraying parameter acquisition device, an operating velocity simulator, a mist spraying structure, a display device and a controller; the operating velocity simulator comprises a velocity sensor; the mist spraying structure comprises a liquid chemical box, electric pumps, a pressure tank and a chemical conveying pipe which are sequentially connected, and more than one spray nozzles are arranged on the chemical conveying pipe; the mist-spraying parameter acquisition device comprises a flow sensor arranged at an inlet of the pressure tank and a pressure sensor mounted on the pressure tank; the controller is connected with the display device, the flow sensor, the pressure sensor and the velocity sensor.
Description
Technical field
The present invention relates to precision agriculture field of mechanical technique, relate in particular to a kind of based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation.
Background technology
At present, precisely variable sprays technology becomes the prior development direction of farmland pesticide application technology, be the study hotspot in domestic and international accurate agricultural field, precisely variable sprays the main control mode of technology has: pressure adjustable type, directly note three kinds of concentration adjustment formula and Flow-rate adjustment formulas. Wherein, pressure controlled control mode adopts reciprocating diaphragm pump as liquid feed device, by controlling the opening degree of magnetic valve, regulate outlet loine pressure, reach the object of indirect regulation flow, the cost of this kind of control mode is lower, but because the response time of electromagnetic valve switch is longer, can not better meet under farm work state, spray amount is according to the requirement of operating speed real-time change; Straight note concentration adjustment formula is that medicament and separated from solvent are placed, pump and after pipeline mixes, arrive shower nozzle by liquid pump separately, the concentration that changes the rear liquid of mixing by changing the pump output of medicament realizes variable rate spray, this mode can effectively be avoided the corrosion of liquid to spray tank, but exists liquid to mix problem uneven, that the variable rate spray response time is long with volume; Flow-rate adjustment formula variable rate spray system is the actual mist flow that recently regulates shower nozzle by the signal frequency of change shower nozzle magnetic valve and duty, its flow adjustment range is large, atomization characteristics high conformity, but there is certain pulsation, affect atomizing effect and discharge rate stability, and need to high-frequency electromagnetic valve be installed at each shower nozzle, the cost of variable rate spray system is improved greatly, limit the practical application of this kind of variable rate spray system.
In sum, there is response time length in existing variable rate spray technology, liquid mixing is uneven, atomizing effect uniformity is poor, high in cost of production problem, variation spray technique applying in actual production.
Summary of the invention
The object of the invention be to provide a kind of based on or include the accurate variable rate spray experimental rig of electrodynamic pump rotational speed regulation, can effectively reduce the cost of variable-rate spraying device, improve variable rate spray operation quality, promote the application of accurate variable rate spray in actual production.
The object of the invention is to realize by the following technical solutions:
Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation, comprise spray parameters harvester, operating speed analogue means, spray structure, display unit and controller; Operating speed analogue means is used for simulating spraying machine group job speed and gathers operating speed signal, comprises velocity sensor; Spray structure comprises the spray tank, electrodynamic pump, pressurized tank and the grug transportation tube that connect successively, and grug transportation tube is provided with one with upper nozzle; Spray parameters harvester comprises and is arranged on the flow sensor of pressurized tank porch and is arranged on the pressure sensor on pressurized tank; Display unit is used for frequency and the dutycycle of the PWM value of input control electrodynamic pump rotating speed, and shows operating speed, mu discharge rate, flow and pressure; Controller connects display unit, flow sensor, pressure sensor and velocity sensor, the signal of acquisition and recording flow sensor, pressure sensor, velocity sensor, and the duty of calculative determination PWM value when frequency and discharge relation, determine relation between the relation of flow adjustment range, calculative determination PWM value and fogdrop diameter, spray angle and spray amount and the real-time discharge rate of calculative determination and theoretical discharge rate according to the frequency of PWM value and dutycycle.
Further, operating speed analogue means comprise motor, the gear being connected with motor and the velocity sensor being connected with gear.
Further, controller is single-chip microcomputer, single-chip microcomputer input connects A/D change-over circuit and power circuit, single-chip microcomputer output connects for controlling the PWM drive circuit of electrodynamic pump and the communicating circuit being connected with display unit, and A/D change-over circuit is connected to pressure sensor, velocity sensor and flow sensor.
Further, electrodynamic pump is the electric diaphragm pump of a more parallel.
Further, display unit is touch-control input and display device.
Further, it also includes workbench, and spray tank, electrodynamic pump, pressurized tank and display unit are all bolted on workbench top, and motor, velocity sensor and controller are all bolted on workbench bottom.
Further, workbench is welded by shaped steel.
Operation principle of the present invention:
By by the discharge rate of setting and the rate signal matching of collection, regulate the frequency of pwm signal and the rotation speed change of Duty ratio control electrodynamic pump, realize accurate variable rate spray. By frequency and the dutycycle of the different pwm signal of touch-control terminal, flow and the pressure of spray parameters harvester monitoring system, obtain the rule characteristic of pwm signal and mist flow, obtains in nominal working range the limit adjustable range of PWM value; Record the time difference that PWM value change time and flow change, obtain the transient response time of spraying system; The impact of the variation of recording PWM value on spray amount distribution, spreading of spray, fogdrop diameter; Spray parameters harvester arranges the rotating speed of motor, operating speed sensor picking rate signal, and signal value is sent to controller, realize the accurate variable rate spray based on speed; This experimental rig can coordinate with other experimental rigs, measures the parameters such as spray angle, fogdrop diameter, spray amount distribution.
Beneficial effect of the present invention:
1. compact conformation of the present invention, versatility is good, can carry out the infrastest of accurate variable rate spray, promotes and lays the first stone for the land for growing field crops of accurate variable rate spray.
2. operating speed analogue means can analog machine group job speed, velocity sensor accurate picking rate signal in real time, and can check the accuracy of speed acquisition.
3. display unit is touch-control input and display device, can realize man-machine interaction, display speed, mist flow and pressure in real time, and can pass through the parameter such as frequency and dutycycle of human-computer interaction interface quick-setting mu discharge rate, speed motor speed, PWM value, have simple to operately, running parameter is changed advantage easily.
The present invention can with the parameters such as other experimental rig conjunction measuring spraying distributions, fogdrop diameter, spray angle.
5. variable rate spray experimental rig of the present invention has flow sensor, can Real-time Collection mist flow, realize the closed-loop control of variable rate spray.
6. Variable rate sprayer controller of the present invention can gather according to same time interval flow and the pressure of spraying, and flow value and force value automatically can be preserved and derived, can record flow and pressure that PWM value changes rear system, draw mist flow and the relationship of PWM value and the dynamic response time of variable rate spray, for land for growing field crops application and the popularization of the vehicle-mounted variable rate spray based on electrodynamic pump are provided fundamental basis.
7. can carry out orthogonal test by variable rate spray experimental rig of the present invention, draw the influence factor that affects atomization quality, and draw the optimal combination of each influence factor.
8. variable rate spray experimental rig of the present invention has pressure sensor, can Real-time Collection atomisation pressure, can obtain within the scope of rated operating pressure the limit adjustable range of PWM value.
9. the rule of exploring by variable rate spray experimental rig of the present invention and the conclusion drawing, can be applied to the land for growing field crops variable rate spray Work machine taking electrodynamic pump as main press member, and can simplify native system type, reduce the cost of variable rate spray system, improve the practicality of variable rate spray system, accelerate variable rate spray applying in actual production, reduce agricultural chemicals input amount and environmental pollution, obtain good economy, society, environmental benefit.
Brief description of the drawings
Fig. 1 is precision and quantity-variation atomizing tester structural representation of the present invention;
Fig. 2 is the theory diagram of controller of the present invention;
In figure, 1 spray tank; 2 electrodynamic pumps; 3 flow sensors; 4 pressure sensors; 5 pressurized tanks; 6 grug transportation tubes; 7 shower nozzles; 8 workbenches; 9 display unit; 10 controllers; 11 gears; 12 velocity sensors; 13 motors.
Detailed description of the invention
Better understand the present invention for the ease of those skilled in the art, below in conjunction with the drawings and specific embodiments, the present invention is described in further details, following is only the exemplary protection scope of the present invention that do not limit.
Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation, comprise spray parameters harvester, operating speed analogue means, spray structure, display unit 9 and controller 10; Operating speed analogue means is used for simulating spraying machine group job speed and gathers operating speed signal, the gear 11 that comprise motor 13, is connected with motor 13 and the velocity sensor 12 being connected with gear 11; Spray structure comprises the spray tank 1, electrodynamic pump 2, pressurized tank 5 and the grug transportation tube 6 that connect successively, and grug transportation tube 6 is provided with one with upper nozzle 7; Spray parameters harvester comprises and is arranged on the flow sensor 3 of pressurized tank 5 porch and is arranged on the pressure sensor 4 on pressurized tank 5; Display unit 9 is touch-control input and display device, for frequency and the dutycycle of the PWM value of input control electrodynamic pump rotating speed, and shows operating speed, mu discharge rate, flow and pressure; Controller 10 connects display unit 9, flow sensor 3, pressure sensor 4 and velocity sensor 12, the signal of acquisition and recording flow sensor 3, pressure sensor 4, velocity sensor 12, and the duty of calculative determination PWM value when frequency and discharge relation, determine relation between the relation of flow adjustment range, calculative determination PWM value and fogdrop diameter, spray angle and spray amount and the real-time discharge rate of calculative determination and theoretical discharge rate according to the frequency of PWM value and dutycycle.
The present embodiment, with reference to accompanying drawing 2, controller is single-chip microcomputer, single-chip microcomputer input connects A/D change-over circuit and power circuit, single-chip microcomputer output connects for controlling the PWM drive circuit of electrodynamic pump and the communicating circuit being connected with display unit 9, and A/D change-over circuit is connected to pressure sensor, velocity sensor and flow sensor.
The present embodiment, electrodynamic pump 2 is the electric diaphragm pump of a more parallel.
The present embodiment, precision and quantity-variation atomizing tester also includes workbench 8, workbench 8 is welded by shaped steel, spray tank 1, electrodynamic pump 2, pressurized tank 5 and display unit 9 are all bolted on workbench 8 tops, and motor 13, velocity sensor 12 and controller 10 are all bolted on workbench 8 bottoms.
The concrete application of experimental rig of the present invention is as follows:
1. when frequency and discharge relation of the duty of calculative determination PWM value:
Circuit switches on power, after system initialization, enter duty, display unit 9 enters human-computer interaction interface, first, select the test model of PWM adjust flux in display unit 9, under this pattern, need the signal of input to have dutycycle and the frequency of PWM value, flow sensor and pressure sensor gather flow and pressure signal. Operating process: first keeping dutycycle is that fixed value is constant, changes frequency, records the flow in the 30s time, repeatedly measures and averages, and draws out the curve of frequency values and flow, and obtains relational expression; Holding frequency value remains unchanged, and changes dutycycle, records the flow in the 30s time, repeatedly measures and averages, and draws out the curve of dutycycle and flow, and obtains relational expression. And can contrast dutycycle and the affect obvious degree of frequency on flow and pressure.
2. determine flow adjustment range according to the frequency of PWM value and dutycycle
Input successively dutycycle and the frequency values of pwm signal by order from small to large by display unit 9, under each input value, measure fogdrop diameter, and keep a record, when getting fogdrop diameter and meeting spraying operation requirement, the frequency of pwm signal and dutycycle are as the initial value of Flow-rate adjustment, signal value is increased to maximum successively, obtain the maximum of flow, initial value and maximum are the adjustable range of flow.
3. the relation of calculative determination PWM value and fogdrop diameter, spray angle and spray amount
To test the 2 pwm signal initial values that record as initial value, increase successively pwm signal to 100%, under each value, measure fogdrop diameter, spray angle, the distribution of mist amount, draw the relation that affects that pwm signal distributes on fogdrop diameter, spray angle, mist amount.
4. relation between the real-time discharge rate of calculative determination and theoretical discharge rate
The circuit that switches on power, enters duty after system initialization, display unit 9 enters human-computer interaction interface, selects simulation job pattern, and the parameter that display unit 9 shows has operating speed input value, actual measurement operating speed, mu discharge rate, flow, pressure. first input operating speed by display unit 9, controller 10 drive motors 13, motor 13 driven gears 11 rotate, velocity sensor 12 is by the approaching of induction gear 11 gear teeth and leave generation low and high level signal, and signal is transferred to controller 10, the speed that velocity sensor 12 detects is regarded as operation group degree, by display unit 9 input mu discharge rates, controller produces the signal of controlling electrodynamic pump 2 according to the relation of pwm signal and flow, flow and pressure sensor 4 are measured mist flow and pressure in real time, controller 10 regulates pwm signal in real time according to the flow value of feedback, real-time traffic is mated with theoretical delivery.
Below only described general principle of the present invention and preferred embodiment, those skilled in the art can make many changes and improvements according to foregoing description, and these changes and improvements should belong to protection scope of the present invention.
Claims (7)
- Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation, it is characterized in that: comprise spray parameters harvester, operating speed analogue means, spray structure, display unit and controller (10); Operating speed analogue means is used for simulating spraying machine group job speed and gathers operating speed signal, comprises velocity sensor; Spray structure comprises the spray tank (1), electrodynamic pump (2), pressurized tank (5) and the grug transportation tube (6) that connect successively, and grug transportation tube (6) is provided with one with upper nozzle (7); Spray parameters harvester comprises and is arranged on the flow sensor (3) of pressurized tank (5) porch and is arranged on the pressure sensor (4) on pressurized tank (5); Display unit is used for frequency and the dutycycle of the PWM value of input control electrodynamic pump rotating speed, and shows operating speed, mu discharge rate, flow and pressure; Controller (10) connects display unit, flow sensor (3), pressure sensor (4) and velocity sensor (12), the signal of acquisition and recording flow sensor (3), pressure sensor (4), velocity sensor (12), and the duty of calculative determination PWM value when frequency and discharge relation, determine relation between the relation of flow adjustment range, calculative determination PWM value and fogdrop diameter, spray angle and spray amount and the real-time discharge rate of calculative determination and theoretical discharge rate according to the frequency of PWM value and dutycycle.
- 2. precision and quantity-variation atomizing tester according to claim 1, is characterized in that: operating speed analogue means comprises motor (13), the gear (11) being connected with motor (13) and the velocity sensor (12) being connected with gear (11).
- 3. the precision and quantity-variation atomizing tester of stating according to claim 1, it is characterized in that: controller is single-chip microcomputer, single-chip microcomputer input connects A/D change-over circuit and power circuit, single-chip microcomputer output connects for controlling the PWM drive circuit of electrodynamic pump and the communicating circuit being connected with display unit, and A/D change-over circuit is connected to pressure sensor, velocity sensor and flow sensor.
- 4. precision and quantity-variation atomizing tester according to claim 1, is characterized in that: electrodynamic pump (2) is the electric diaphragm pump of a more parallel.
- 5. according to the precision and quantity-variation atomizing tester described in claim 1 or 2 or 3 or 4, it is characterized in that: display unit is touch-control input and display device.
- 6. according to the precision and quantity-variation atomizing tester described in claim 2 or 3 or 4, it is characterized in that: it also includes workbench, spray tank (1), electrodynamic pump (2), pressurized tank (5) and display unit are all bolted on workbench top, and motor (13), velocity sensor (12) and controller (10) are all bolted on workbench bottom.
- 7. precision and quantity-variation atomizing tester according to claim 6, is characterized in that: workbench is welded by shaped steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100536.XA CN105594679B (en) | 2016-02-24 | 2016-02-24 | Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100536.XA CN105594679B (en) | 2016-02-24 | 2016-02-24 | Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation |
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| Publication Number | Publication Date |
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| CN105594679A true CN105594679A (en) | 2016-05-25 |
| CN105594679B CN105594679B (en) | 2018-09-25 |
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| CN201610100536.XA Expired - Fee Related CN105594679B (en) | 2016-02-24 | 2016-02-24 | Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219070A (en) * | 2017-06-23 | 2017-09-29 | 西安交通大学 | A kind of modular spray field flux density apparatus for measuring distribution and application method |
| CN109548773A (en) * | 2018-12-19 | 2019-04-02 | 山东创立智能设备有限公司 | Variable rate sprayer controller |
| CN111357725A (en) * | 2018-12-25 | 2020-07-03 | 新疆工程学院 | Thermal smoke sprayer |
| CN112154996A (en) * | 2020-09-17 | 2021-01-01 | 华南农业大学 | Dual PID control accurate variable pesticide application system and feedback adjustment method thereof |
| CN112473417A (en) * | 2020-11-09 | 2021-03-12 | 江苏大学 | Online medicine mixing method and device for controlling medicine mixing ratio through pulse width modulation |
| CN114073220A (en) * | 2020-08-13 | 2022-02-22 | 湖南迪宏物联科技有限公司 | Spraying control method and device |
| CN114097755A (en) * | 2021-11-26 | 2022-03-01 | 山东省农业机械科学研究院 | Air curtain guide plate type auxiliary spraying device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219070A (en) * | 2017-06-23 | 2017-09-29 | 西安交通大学 | A kind of modular spray field flux density apparatus for measuring distribution and application method |
| CN107219070B (en) * | 2017-06-23 | 2023-04-07 | 西安交通大学 | Modular spray field flow density distribution measuring device and using method |
| CN109548773A (en) * | 2018-12-19 | 2019-04-02 | 山东创立智能设备有限公司 | Variable rate sprayer controller |
| CN111357725A (en) * | 2018-12-25 | 2020-07-03 | 新疆工程学院 | Thermal smoke sprayer |
| CN114073220A (en) * | 2020-08-13 | 2022-02-22 | 湖南迪宏物联科技有限公司 | Spraying control method and device |
| CN112154996A (en) * | 2020-09-17 | 2021-01-01 | 华南农业大学 | Dual PID control accurate variable pesticide application system and feedback adjustment method thereof |
| CN112154996B (en) * | 2020-09-17 | 2024-05-10 | 华南农业大学 | Dual PID control accurate variable pesticide application system and feedback adjustment method thereof |
| CN112473417A (en) * | 2020-11-09 | 2021-03-12 | 江苏大学 | Online medicine mixing method and device for controlling medicine mixing ratio through pulse width modulation |
| CN114097755A (en) * | 2021-11-26 | 2022-03-01 | 山东省农业机械科学研究院 | Air curtain guide plate type auxiliary spraying device |
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| CN105594679B (en) | 2018-09-25 |
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