CN107589679A - A kind of variable fertilization control system - Google Patents
A kind of variable fertilization control system Download PDFInfo
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- CN107589679A CN107589679A CN201610536157.5A CN201610536157A CN107589679A CN 107589679 A CN107589679 A CN 107589679A CN 201610536157 A CN201610536157 A CN 201610536157A CN 107589679 A CN107589679 A CN 107589679A
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- control system
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- hydraulic motor
- variable fertilization
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Abstract
A kind of variable fertilization control system, actuator of the selected hydraulic motor as driving fertilizer mechanism, using electromagnetic hydraulic pressure proportioning valve as hydraulic motor control unit, different electric signals is exported by closed loop controller, to be controlled the rotating speed of the big minor adjustment hydraulic motor of the aperture of electromagnetic hydraulic pressure proportioning valve valve, the control to fertilizer mechanism (fertilizer apparatus) rotating speed is realized.The system is made up of singlechip controller, signal gathering unit, hydraulic pressure drive control system, and GPS navigation locator variable fertilising mode of operation is realized by using Visual Basic6.0 programming softwares.The control system advanced technology, dependable performance, it is easy to operate, have higher control accuracy, farm work can be carried out under different work mode, meet the design requirement of control system.
Description
Art
The present invention relates to a kind of variable fertilization control system, suitable for mechanical field.
Background technology
The high speed development of modern agriculture, except by biotechnology progress and cultivated area, irrigated area expansion in addition to,
Substantially obtained under the conditions of a large amount of inputs of the chemicals such as chemical fertilizer and agricultural chemicals and fossil energy.But thus caused water and soil
It is lost in, the ecological environment problem such as agricultural product and underground water pollution, soil productivity decline, body eutrophication, has caused
The extensive concern of international community, and promoted the generation and development of agricultural sustainable development and precision agriculture theory.Precision agriculture
It is modern information technologies, Crop Planting Management Agriculture Expert technology, develops on the basis of a series of new and high technologies such as agriculture project equipment technology
A kind of important the modern agricultural production form and management mode got up, its core concept be obtain farmland cell crop yield and
Influence the sky of environmental factor (such as soil texture, landform, weather, soil fertility, disease pest and weed) physical presence of crop production
Between and time difference information, the reason for analyzing influence cell production difference, take technically feasible, economically effective regulation and control are arranged
Apply, change traditional agriculture large area, the wasting of resources practice of large sample average input, implement positioning to doing thing cultivation management, press
Variable is needed to put into.It includes precision and quantity-variation type seeding, accurately sprays insecticide, and precision and quantity-variation is irrigated, precision and quantity-variation fertilising, harvest information
Gather these links.And the rise of precision agriculture proposes new theory and technology requirement to the rational application of fertilizer.From making for chemical fertilizer
For seeing, utilization rate of fertilizer is low not only to make production cost higher, and causes the environmental problems such as surface water and groundwater pollution.Essence
The theory and technology of true variable fertilization will be the effective way that solves this problem.
The content of the invention
The present invention proposes a kind of variable fertilization control system, and the system is by singlechip controller, signal gathering unit, liquid
Pressure transmission control composition, GPS navigation locator variable fertilising Working mould is realized by using Visual Basic6.0 programming softwares
Formula.
The technical solution adopted in the present invention is：
The control system selectes actuator of the hydraulic motor as driving fertilizer mechanism, using electromagnetic hydraulic pressure proportioning valve as liquid
Pressure motor control unit, different electric signals is exported by closed loop controller, to be controlled electromagnetic hydraulic pressure proportioning valve valve
The rotating speed of the big minor adjustment hydraulic motor of aperture, realizes the control to fertilizer mechanism (fertilizer apparatus) rotating speed, to reach variable fertilization
Purpose.
The variable fertilization drive dynamic control device is driving and the control device of independent Variable Rate Seeding Machine,
It is connected with existing seeding and fertilizing seeder, realizes the Variable Control of granular chemical fertilizer.Variable fertilization drive device can be installed
On domestic soybean fertilizing precise seeding machine, drawn by large-scale wheeled tractor and carry out soybean variable fertilization seeding operation.Installation
DGPS determines the position that seeder is asked in field on tractor, this positional information is sent to by RS-232 serial line interfaces vehicle-mounted
Handled in computer, car-mounted computer by seeder field position display on the computer screen, by variable fertilization
Variable fertilization data search in database with field position correspondence comes out, and is output in variable closed loop controller, variable closed loop
Controller controls the aperture of electromagnetic hydraulic pressure proportioning valve, changes soybean precision seeder machine row's device fertilizer rotating speed, reaches and change seeder fertilizer
The purpose of amount.
The rotating speed of the hydraulic motor is fed back in closed loop controller main control chip by magnetic resistance speed sensor and formed
Closed-loop control, in addition, Doppler's speed radar sensor (or determining Running Speed of Tractor by DGPS) is by acquisition
The rate signal that Variable Rate Seeding Machine is advanced, and the regulation for participating in dose is input a signal into closed loop controller.
The valve-controlled motor closed-loop system includes instruction element, comparing element, electro-hydraulic proportional valve, proportional amplifier, hydraulic pressure
The part of motor and speed probe etc. six.
The closed-loop system research of the control system controls the rotating speed of fertilization axle using the closed loop controller of independent development, with
Phase reaches the purpose of Variable Control dose, therefore the closed loop controller of independent development is the emphasis of research.Host computer connects
GPS location data are received, control special-purpose software to handle position data by the variable fertilization voluntarily developed, and to current
Position carries out grid identification, the dose data in reading database.Then variable fertilization data are passed through into computer RS-232
Serial line interface is sent in slave computer (closed loop controller), and application date is changed into analog output by digital quantity；Pass through amplification
Driver amplifies variable signal, to control the aperture of electromagnetic hydraulic pressure proportioning valve, the flow of hydraulic oil is controlled, so as to control hydraulic pressure
The rotating speed of motor；Seeder fertilization axle realizes that Variable Control is applied fertilizer by fluid motor-driven.
The control system selects the executable portion that hydraulic motor applies fertilizer as automatic variable, because the torque of hydraulic motor
Greatly, large tractor is all the tractor of hydraulic system, without extra increase equipment.Many scholars are for control system, often
The executable portion applied fertilizer from stepper motor as automatic variable, stepper motor operation principle be it is every reception one pulse, stepping
Motor just turns over an angle, in the range of moment of torsion permission, will not the fierce change for moment of torsion and step-out, hydraulic pressure horse can be avoided
Reach or DC motor Driver needs to use deceleration device, also allow for being controlled, the stability for controlling organization is favourable；
But introduce stepper motor, it is desirable to provide extra supply of electric power increases generating equipment, it is necessary to which tractor is again extra.
The variable fertilization closed loop control process mainly includes control system main program, serial communication subprogram, at data
Manage subprogram, LED charactrons display driving subprogram, parameter setting read-write subprogram, output control subprogram etc..
The beneficial effects of the invention are as follows：The control system advanced technology, dependable performance, it is easy to operate, there is higher control
Precision processed, farm work can be carried out under different work mode, meet the design requirement of control system.
Brief description of the drawings
Fig. 1 is the variable fertilizing control device theory of constitution block diagram of the present invention.
Fig. 2 is the Electro-hydraulic Proportional Control motor closed-loop control system block diagram of the present invention.
Fig. 3 is the variable fertilization electrohydraulic control system theory diagram of the present invention.
Fig. 4 is the hardware circuit composition frame chart of the closed loop controller of the present invention.
Fig. 5 is the main program flow chart of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, control system selectes actuator of the hydraulic motor as driving fertilizer mechanism, using electromagnetic hydraulic pressure proportioning valve
As hydraulic motor control unit, different electric signals is exported by closed loop controller, to be controlled electromagnetic hydraulic pressure proportioning valve
The rotating speed of the big minor adjustment hydraulic motor of aperture of valve, realizes the control to fertilizer mechanism (fertilizer apparatus) rotating speed, to reach variable
The purpose of fertilising.
Variable fertilization drive dynamic control device is driving and the control device of independent Variable Rate Seeding Machine, it with
Existing seeding and fertilizing seeder is connected, and realizes the Variable Control of granular chemical fertilizer.Variable fertilization drive device can be arranged on state
Produce on soybean fertilization precision drill, drawn by large-scale wheeled tractor and carry out soybean variable fertilization seeding operation.Installed in dragging
DGPS determines the position that seeder is asked in field in machine drawing, and this positional information is sent into vehicle computing by RS-232 serial line interfaces
Handled in machine, car-mounted computer by seeder field position display on the computer screen, by variable fertilization data
Variable fertilization data search in storehouse with field position correspondence comes out, and is output in variable closed loop controller, variable closed-loop control
Device controls the aperture of electromagnetic hydraulic pressure proportioning valve, changes soybean precision seeder machine row's device fertilizer rotating speed, reaches and change seeder defertilizing amount
Purpose.
The rotating speed of hydraulic motor feeds back in closed loop controller main control chip to form and closed by magnetic resistance speed sensor
Ring controls, and (or determining Running Speed of Tractor by DGPS) is by the variable of acquisition in addition, Doppler's speed radar sensor
The rate signal that combined seed and fertilizer drill advances, and the regulation for participating in dose is input a signal into closed loop controller.
Such as Fig. 2, valve-controlled motor closed-loop system includes instruction element, comparing element, electro-hydraulic proportional valve, proportional amplifier, liquid
The part of pressure motor and speed probe etc. six.Speed probe：It is used for detecting the rotating speed of hydraulic motor, measures control system
Speed feedback signal, the requirement compared for meeting control system.When testing the speed, when pinion rotation, due to the magnetic force at air gap
Line changes, and the magnetic resistance in magnetic circuit also changes therewith, so as to produce the electric signal of change in the sensor, becomes through processing
For pulse signal, further, since magnetoresistive transducer has a very strong directionality, rotation of the sensor probe to gear is very sensitive
, and the shake to gear vertically is insensitive.This is highly beneficial to ensureing rate accuracy.Instruction element：Also referred to as input element.Refer to
Make signal with program setting or can manually set.In the electrohydraulic control system that we research and develop, instruction element is vehicle-mounted meter
Calculation machine, RS-232 serial line interface output instruction signals are passed through by car-mounted computer.Comparing element：The effect of comparing element be by
Determine input signal and feedback signal is compared, calculate input of the deviation signal as proportional amplifier.In this control system
In, comparing element uses one-chip computer.Proportional amplifier：The control electric current that electro-hydraulic proportional valve electromagnet needs is larger, typically
Obtaining hundreds of milliamperes could drive, but the deviation control electric current from comparing element output is smaller, and passing ratio amplifier is to input
Signal be processed, shaping and amplification, make up to the control requirement of electro-hydraulic proportional valve.Electro-hydraulic proportional valve：It is control system
Key element in system.It is made up of inside electro-hydraulic proportional valve electromechanical converter and hydraulic pressure amplifier element two parts.The machinery of electricity one
Converter is electrichydraulic control interface element, and the current signal of input is converted into the power directly proportional to electric current or displacement by it.Electricity
Gas control signal, which is amplified to, is enough driving system loads.The also referred to as power amplifying part of whole system.Hydraulic motor：It
It is the executive component of control system, for driving load.Activation force is produced to be added on variable control system fertilizer apparatus axle, it is real
Existing fertilizer apparatus rotating speed step-less adjustment.
Such as Fig. 3, the closed-loop system research of control system controls the rotating speed of fertilization axle using the closed loop controller of independent development,
To reach the purpose of Variable Control dose, therefore the closed loop controller of independent development is the emphasis of research.Host computer
GPS location data are received, control special-purpose software to handle position data by the variable fertilization voluntarily developed, and to working as
Front position carries out grid identification, the dose data in reading database.Then variable fertilization data are passed through into computer RS-
232 serial line interfaces are sent in slave computer (closed loop controller), and application date is changed into analog output by digital quantity；Pass through
Amplification driver amplifies variable signal, to control the aperture of electromagnetic hydraulic pressure proportioning valve, the flow of hydraulic oil is controlled, so as to control
The rotating speed of hydraulic motor；Seeder fertilization axle realizes that Variable Control is applied fertilizer by fluid motor-driven.
Control system selects the executable portion that hydraulic motor applies fertilizer as automatic variable, because the torque of hydraulic motor is big,
Large tractor is all the tractor of hydraulic system, without extra increase equipment.Many scholars often select for control system
The executable portion that stepper motor applies fertilizer as automatic variable, stepper motor operation principle be it is every reception one pulse, stepper motor
Just turn over an angle, in the range of moment of torsion permission, will not the fierce change for moment of torsion and step-out, can avoid hydraulic motor or
DC motor Driver needs to use deceleration device, also allows for being controlled, and the stability for controlling organization is favourable；But
Introduce stepper motor, it is desirable to provide extra supply of electric power increases generating equipment, it is necessary to which tractor is again extra.
Such as Fig. 4, closed loop controller is mainly deposited by voltage-stabilized power supply circuit, SCM system, reset control circuit, arrange parameter
Storing up electricity road, LED charactrons display driving, 4 LED show charactron circuit, voltage to frequency (V/F) change-over circuit, A/D conversion electricity
The partial circuit compositions such as road, serial ports RS-232 communication change-over circuits, D/A change-over circuits, electromagnetic proportional valve amplification driving circuit.Close
Ring controller receives car-mounted computer control instruction and feedback signal and is compared, according to comparative result to electro-hydraulic proportional valve
Aperture be controlled, so as to control fertilizer rotating speed.
Such as Fig. 5, variable fertilization closed loop control process mainly includes control system main program, serial communication subprogram, data
Handle subprogram, LED charactrons display driving subprogram, parameter setting read-write subprogram, output control subprogram etc..Will be each
Subroutine module is grouped together, and obtains system main program flow chart.
Claims (6)
1. a kind of variable fertilization control system, it is characterized in that：The control system selectes hydraulic motor as driving fertilizer mechanism
Actuator, using electromagnetic hydraulic pressure proportioning valve as hydraulic motor control unit, different telecommunications is exported by closed loop controller
Number, to be controlled the rotating speed of the big minor adjustment hydraulic motor of the aperture of electromagnetic hydraulic pressure proportioning valve valve, realize to fertilizer mechanism (row
Fertile device) rotating speed control, to reach the purpose of variable fertilization.
2. a kind of variable fertilization control system according to claim 1, it is characterized in that：The variable fertilization drive control dress
Put be independent Variable Rate Seeding Machine driving and control device, it is connected with existing seeding and fertilizing seeder
Connect, realize the Variable Control of granular chemical fertilizer.
3. a kind of variable fertilization control system according to claim 1, it is characterized in that：The rotating speed for stating hydraulic motor passes through magnetic
Resistive speed probe feeds back in closed loop controller main control chip and forms closed-loop control, in addition, Doppler's speed radar passes
The rate signal that sensor (or determining Running Speed of Tractor by DGPS) advances the Variable Rate Seeding Machine of acquisition, and will
Signal is input to the regulation that dose is participated in closed loop controller.
4. a kind of variable fertilization control system according to claim 1, it is characterized in that：The valve-controlled motor closed-loop system bag
Include the part of instruction element, comparing element, electro-hydraulic proportional valve, proportional amplifier, hydraulic motor and speed probe etc. six.
5. a kind of variable fertilization control system according to claim 1, it is characterized in that：The control system selects hydraulic pressure horse
Up to the executable portion applied fertilizer as automatic variable, because the torque of hydraulic motor is big, large tractor is all dragging for hydraulic system
Machine drawing, without extra increase equipment.
6. a kind of variable fertilization control system according to claim 1, it is characterized in that：The variable fertilization closed-loop control journey
Sequence mainly includes control system main program, serial communication subprogram, data processing subprogram, the sub- journey of LED charactrons display driving
Sequence, parameter setting read-write subprogram, output control subprogram etc..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610536157.5A CN107589679A (en) | 2016-07-10 | 2016-07-10 | A kind of variable fertilization control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610536157.5A CN107589679A (en) | 2016-07-10 | 2016-07-10 | A kind of variable fertilization control system |
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| Publication Number | Publication Date |
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| CN107589679A true CN107589679A (en) | 2018-01-16 |
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| CN201610536157.5A Pending CN107589679A (en) | 2016-07-10 | 2016-07-10 | A kind of variable fertilization control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108307754A (en) * | 2018-02-07 | 2018-07-24 | 北京农业信息技术研究中心 | A kind of quantificationally fertilizing machine |
| CN108934351A (en) * | 2018-05-14 | 2018-12-07 | 吉林大学 | A kind of Tree Precise Fertilization device based on multiple spot radar |
| CN109511331A (en) * | 2019-01-16 | 2019-03-26 | 中国农业大学 | One kind seeking kind of a formula liquid fertilizer positioning accurate and applies system |
| CN111856948A (en) * | 2020-05-25 | 2020-10-30 | 吉林大学 | Accurate variable fertilization electrohydraulic control device and control method |
| CN114721300A (en) * | 2022-04-07 | 2022-07-08 | 四川农业大学 | Seed manure synchronous driving system and control method |
-
2016
- 2016-07-10 CN CN201610536157.5A patent/CN107589679A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108307754A (en) * | 2018-02-07 | 2018-07-24 | 北京农业信息技术研究中心 | A kind of quantificationally fertilizing machine |
| CN108934351A (en) * | 2018-05-14 | 2018-12-07 | 吉林大学 | A kind of Tree Precise Fertilization device based on multiple spot radar |
| CN109511331A (en) * | 2019-01-16 | 2019-03-26 | 中国农业大学 | One kind seeking kind of a formula liquid fertilizer positioning accurate and applies system |
| CN111856948A (en) * | 2020-05-25 | 2020-10-30 | 吉林大学 | Accurate variable fertilization electrohydraulic control device and control method |
| CN114721300A (en) * | 2022-04-07 | 2022-07-08 | 四川农业大学 | Seed manure synchronous driving system and control method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180116 |
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| WD01 | Invention patent application deemed withdrawn after publication |