CN1751554A - Automatic control device for variable fertilizing by sower based on GPS - Google Patents
Automatic control device for variable fertilizing by sower based on GPS Download PDFInfo
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- CN1751554A CN1751554A CN 200510114778 CN200510114778A CN1751554A CN 1751554 A CN1751554 A CN 1751554A CN 200510114778 CN200510114778 CN 200510114778 CN 200510114778 A CN200510114778 A CN 200510114778A CN 1751554 A CN1751554 A CN 1751554A
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Abstract
An automatic controller based on GPS for the sower in order to apply fertilizer in variable mode is sequentially composed of radio data transceiver, GPS receiver, velicular computer, variable control driver and electrically controlled stepless speed variator. Its control procedure includes such steps as receiving GPS information by GPS receiver to determine the position of sower in field, transmitting the position information to computer, combining the data about applying fertilizer in variable mode with said position information, sending instructions to the variable control driver and controlling the drive ratio of fertilizer-discharging system.
Description
Technical field
The present invention relates to a kind of agricultural machinery, it specifically is a kind of automatic control device for variable fertilizing by sower based on GPS, determine the position, field of sower by vehicle GPS, positional information is sent in the calculator by serial line interface, calculator combines the variable fertilization data in the database with the field positional information, send instruction to the Variable Control driver, Variable Control driver control electric steplessly variable transmission changes the gearratio of sower fertilizer transmission system, reaches the purpose of variable fertilization.
Background technology
Tradition sower fertilizer power relies on the land wheel transmission, and the size variation of defertilizing amount realizes by changing the fertilizer gearratio, mechanism's complexity, speed change trouble; Can not control what of fertilizing amount automatically according to the fertility demand of ploughing.
Summary of the invention
Purpose of the present invention just provides a kind of automatic control device for variable fertilizing by sower based on GPS, realizes mechanism's complexity, speed change trouble by changing the fertilizer gearratio with the size variation that solves the defertilizing amount that prior art exists; Can not control the problem of fertilizing amount according to the fertility demand of ploughing automatically.
Technical scheme of the present invention is: comprise the wireless data sending receiver that is linked in sequence successively, the GPS receiver, car-mounted computer, Variable Control driver and electric steplessly variable transmission, determine the position, field of sower according to the GPS information of wireless data sending receiver reception by vehicle-mounted GPS receiver, and positional information is sent in the calculator, calculator combines the variable fertilization data in its database with the field positional information, send instruction to the Variable Control driver, Variable Control driver control electric steplessly variable transmission changes the gearratio of sower fertilizer transmission system, reaches the purpose of variable fertilization.
Described Variable Control driver comprises singlechip chip and the serial interface circuit that is connected with its each interface respectively, reset and anti-jamming circuit, power supply stabilization circuit, motor-drive circuit, instrument amplifier circuit; The input of power supply stabilization circuit is connected with electric power polarity and connects anti-holding circuit; The instrument amplifier circuit is connected with described single-chip microcomputer by the A/D change-over circuit.
Described electric steplessly variable transmission comprises buncher, permanent magnet direct current motor, linear displacement transducer, pair of sprocket and chain, screw mandrel, gear lever, permanent magnet direct current motor drives screw mandrel by pair of sprocket and chain and rotates, this screw mandrel screws in the screw of slide block, and slide block is connected with the expansion link of linear displacement transducer; One end of gear lever is connected with the speed governing end of buncher, and the other end is provided with along the slotted hole of length direction and with described slide block and is slidingly connected; The clutch end of described buncher is used for being connected with the axle of the fertilizer sheave of sower.
The invention has the beneficial effects as follows: the position, field of determining sower by vehicle GPS, positional information is sent in the calculator, calculator combines the variable fertilization data in the database with the field positional information, send instruction to the Variable Control driver, Variable Control driver control electric steplessly variable transmission changes the gearratio of sower fertilizer transmission system, realize remote auto control fertilizing amount, reach the purpose of variable fertilization.Simple in structure, easy to implement, improved agricultural modernization level greatly.
Description of drawings
Fig. 1 be overall formation of the present invention and with the schematic diagram of sower annexation;
Fig. 2 is the circuit block diagram of Variable Control driver of the present invention;
Fig. 3 is an embodiment circuit diagram of serial interface circuit among Fig. 2;
Fig. 4 is the embodiment circuit diagram of instrument amplifier among Fig. 2;
Fig. 5 is the embodiment circuit diagram of A/D converter among Fig. 2;
Fig. 6 resets among Fig. 2 and anti-jamming circuit timing Design figure;
Fig. 7 is the structural representation of electric steplessly variable transmission of the present invention;
Fig. 8 is the structural representation that is in transmission connection that the present invention is applied to sower.
Embodiment
Referring to Fig. 1～Fig. 6, the present invention includes the wireless data sending receiver 1 that is linked in sequence successively, GPS receiver 2, car-mounted computer 3, Variable Control driver 4 and electric steplessly variable transmission 5, determine the position, field of sower according to the GPS information of wireless data sending receiver 1 reception by vehicle-mounted GPS receiver 2, and positional information is sent in the calculator 3 by serial line interface, calculator 3 combines the variable fertilization data in its database with the field positional information, send instruction to Variable Control driver 4, Variable Control driver 4 control electric steplessly variable transmissions 5 change the gearratio of sower chain drive system 7, adjust the rotating speed of sower fertilizer sheave 8, thereby reach the purpose of variable fertilization.Sower land wheel 6 is the motive power that drives fertilizer sheave 8.
Referring to Fig. 2; the core of Variable Control driver 4 is a single chip machine controlling circuit, single chip machine controlling circuit by AT89C51 singlechip chip 41, serial interface circuit 42, resetting connects anti-holding circuit 45, motor-drive circuit 46, voltage reference circuit 47, instrument amplifier circuit 48, A/D change-over circuit 49 etc. with anti-jamming circuit 43, power supply stabilization circuit 44, electric power polarity and forms.Singlechip chip 41 is connected with the output of GPS receiver 2 by serial interface circuit 42, to accept the sower position information from gps system; Resetting is connected with the corresponding interface of singlechip chip 41 respectively with power supply stabilization circuit 44 with anti-jamming circuit 43, and the input of power supply stabilization circuit 44 is connected with electric power polarity and connects anti-holding circuit 45; An output interface of singlechip chip 41 removes to drive dc motor 51 (referring to Fig. 7) in the control continuously variable transmission device 5 by motor-drive circuit 46; Instrument amplifier circuit 48 is connected with an interface of described single-chip microcomputer 41 by A/D change-over circuit 49.
The operation principle of Variable Control driver 4 is: there is a power supply voltage converter serial communication chip MAX232 inside, can input+the 5V voltage transformation be RS 232 output levels required-10～+ 10V voltage.
The agricultural seeder working environment is more abominable, because the work that program fleet and power supply and fault cause is undesired, has designed watchdog circuit in order to prevent.Circuit adopts the MAX813L chip, has functions such as system resets, house dog is regularly exported, supply voltage monitoring.
A/D converter is selected MAX153 for use, can directly link to each other with the Microcomputer Data bus.
The potentiometer that is installed on the gear is a voltage signal with shift transformation.
Added the instrument amplifier AD623 that one-level has the buffering buffer action between displacement transducer and the A/D change-over circuit MAX153.
Because AD623 is designed to drive 10k Ω or the above load of 10k Ω, so when linking to each other, need intermediate amplifier with general A/D converter, 8 A/D conversion chips of the high-performance MAX 153 that adopts U.S. MAXIM company to produce in the native system, defeated people's resistance of its analog channel is designed to the Ω greater than 12.5k, thereby can directly link to each other.
The buncher gear ratio signal is converted to voltage signal through displacement transducer, enters single-chip microcomputer through the A/D change-over circuit, the ICL232 conversion chip with the data signal of single-chip microcomputer through P3.0, the P3.1 mouth, by serial communication to airborne computer.Communication is divided into transmission and receives, the single-chip microcomputer end is handled after adopting inquiry mode that feedback voltage is changed through A/D immediately, gets arithmetic mean of instantaneous value, then mean value is sent to airborne computer, the information that single-chip microcomputer adopts the interrupt mode receiving computer to send.Airborne computer receive behind the signal of single-chip microcomputer with gis database in fertilizing amount relatively, utilize the difference of the two to control rotating speed of motor.
Fig. 3 is an embodiment circuit diagram of the serial interface circuit 42 in the Variable Control driver 4 of the present invention, adopts the MAX232 interface integrated circuit, adopts conventional connected mode to be connected with single-chip microcomputer 41.
Fig. 4 is the embodiment circuit diagram of the instrument amplifier 49 in the Variable Control driver 4 of the present invention, adopt AD623 type amplifying circuit, be connected to conventional feedback circuit, and be connected by MAX153 instrument A/D converter circuit shown in Figure 5 and single-chip microcomputer 41 (89C51) are conventional.
Fig. 6 is resetting and the timing Design figure of anti-jamming circuit 43 in the Variable Control driver 4 of the present invention, resets and anti-jamming circuit 43 adopts 813L house dog integrated circuits to connect according to routine.WDI end is not received the triggering signal from MPU/MCU in 1.6s, and WDI is in non-high-impedance state, then WD0 output step-down.As long as reset signal is effective or WDI input high resistant, then the WatchDog Timer function just is under an embargo, and keeps zero clearing and not-time state.The generation of the reset signal timer that can be under an embargo, in case can reset signal cancel and the WDI input detects low level or the high level saltus step that is as short as 50ns, timer will begin the timing of 1.6s, and promptly the saltus step meeting zero clearing timer of WDI end also starts once new time-count cycle.
Referring to Fig. 7, described electric steplessly variable transmission 5 is made of buncher 52, permanent magnet direct current motor 51, linear displacement transducer 53, pair of sprocket and chain 54, screw mandrel 55, gear lever 56.Screw mandrel 55 rotational support are on the shell of buncher 52, permanent magnet direct current motor 51 drives screw mandrel 55 by pair of sprocket and chain 54 and rotates, be provided with slide block 57 on this screw mandrel, the screw of slide block 57 screws in screw mandrel 55, and slide block 57 is connected with the expansion link 531 of linear displacement transducer 53; The lower end of gear lever 56 is connected with the speed governing end of buncher, and the other end of gear lever 56 is provided with the slotted hole 561 along length direction, and this slotted hole 561 is slidingly connected with described slide block 57.Described buncher 52 is provided with clutch end 521 and is used for being connected with the axle of the fertilizer sheave of sower, and the input of buncher 52 is in transmission connection by the land wheel of transmission system (referring to Fig. 8) and sower.
Described permanent magnet direct current motor 51 adopts 12 volts of 60 watts of automobile permanent magnets to scrape hydroelectric machine, and linear displacement transducer 53 adopts WDL type direct slide conductive plastic potentiometer, and buncher 52 is a three-phase cam-type structure, and gearratio is 0～39.7.Electromotor 51 can drive screw mandrel 55 forward, reverse or stop by sprocket wheel 54 and end under the control of variable controller, and screw mandrel 55 drives swing by slide block 57, and gear lever 56 changes the position of cam, reaches the purpose that changes buncher 52 gearratios.
The MLP feedback device is installed on the buncher 52, and position feedback device is a linear displacement transducer 53.When airborne industrial computer after variable controller input variable instruction, electromotor 51 drives screw mandrel 55 and rotates, adjust the gearratio of buncher 52 by gear lever 56, by feedback transducer feedback adjusting position, if reach the adjustment requirement, variable controller control electromotor stops operating, and finishes the adjustment work of gearratio.
Referring to Fig. 8, the present invention is when using, and the input 522 of the buncher 52 of its electric steplessly variable transmission 5 is connected with the output shaft of sower chain drive system 7.This sower chain drive system 7 is made up of three couples of sprocket wheel Z1～Z6 and corresponding connecting axle, the first couple of sprocket wheel Z1 and Z2 are in transmission connection mutually by chain, axle and 6 coaxial connections of sower land wheel of sprocket wheel Z1, land wheel 6 is the common vehicle road wheel, is fertilizer system motive power.The second couple of sprocket wheel Z3 and Z4 are in transmission connection mutually by chain, and sprocket wheel Z3 is connected with Z2 is coaxial.The 3rd couple of sprocket wheel Z5 and Z6 are in transmission connection mutually by chain, and sprocket wheel Z4 is connected with Z5 is coaxial, and the axle of Z6 is connected with the input 522 of buncher 52.Land wheel 6 drives buncher 52 by chain drive system 7 and rotates when walking, the axle that buncher 52 power take-offs 521 drive the fertilizer sheave rotates.The conventional components of fertilizer applicator on the sower fertilizer sheave sower is a kind of at the uniform reeded fertilizer apparatus of periphery, and when sheave rotated, fertilizer rotated with sheave in the groove, discharges fertilizer during through defertilizing opening.Change the rotating speed of fertilizer expelling shaft, can change its defertilizing amount.
Claims (3)
1. automatic control device for variable fertilizing by sower based on GPS, it is characterized in that: comprise the wireless data sending receiver that is linked in sequence successively, the GPS receiver, car-mounted computer, Variable Control driver and electric steplessly variable transmission, determine the position, field of sower according to the GPS information of wireless data sending receiver reception by vehicle-mounted GPS receiver, and positional information is sent in the calculator, calculator combines the variable fertilization data in its database with the field positional information, send instruction to the Variable Control driver, Variable Control driver control electric steplessly variable transmission changes the gearratio of sower fertilizer transmission system, reaches the purpose of variable fertilization.
2. the automatic control device for variable fertilizing by sower based on GPS according to claim 1 is characterized in that: described Variable Control driver comprises singlechip chip and the serial interface circuit that is connected with its each interface respectively, reset and anti-jamming circuit, power supply stabilization circuit, motor-drive circuit, instrument amplifier circuit; The input of power supply stabilization circuit is connected with electric power polarity and connects anti-holding circuit; The instrument amplifier circuit is connected with described single-chip microcomputer by the A/D change-over circuit.
3. the automatic control device for variable fertilizing by sower based on GPS according to claim 1, it is characterized in that: described electric steplessly variable transmission comprises buncher, permanent magnet direct current motor, linear displacement transducer, pair of sprocket and chain, screw mandrel, gear lever, permanent magnet direct current motor drives screw mandrel by pair of sprocket and chain and rotates, this screw mandrel screws in the screw of slide block, and slide block is connected with the expansion link of linear displacement transducer; One end of gear lever is connected with the speed governing end of buncher, and the other end is provided with along the slotted hole of length direction and with described slide block and is slidingly connected; The clutch end of described buncher is used for being connected with the axle of the fertilizer sheave of sower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510114778 CN1751554A (en) | 2005-10-27 | 2005-10-27 | Automatic control device for variable fertilizing by sower based on GPS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510114778 CN1751554A (en) | 2005-10-27 | 2005-10-27 | Automatic control device for variable fertilizing by sower based on GPS |
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| CN1751554A true CN1751554A (en) | 2006-03-29 |
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| CN 200510114778 Pending CN1751554A (en) | 2005-10-27 | 2005-10-27 | Automatic control device for variable fertilizing by sower based on GPS |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840211A (en) * | 2010-05-27 | 2010-09-22 | 山西农业大学 | Variable control device for fertilizing and sowing |
| CN101943899A (en) * | 2010-07-12 | 2011-01-12 | 中国农业大学 | Man-machine interactive system of agricultural variable fertilizing machine |
| CN103250493A (en) * | 2013-05-20 | 2013-08-21 | 葛俊峰 | GPS (Global Positioning System)-based precise seed metering device |
| US8777707B2 (en) | 2007-10-04 | 2014-07-15 | David Stanley Hoyle | Spreader with GPS guided spread pattern |
| CN104604411A (en) * | 2015-01-29 | 2015-05-13 | 北京农业智能装备技术研究中心 | Novel dot liquid fertilizer injection device and method |
| CN108307756A (en) * | 2018-04-04 | 2018-07-24 | 安徽省超艺禾佳农业机械制造有限公司 | A kind of quantization fertilizer spreader |
| CN112740877A (en) * | 2020-12-29 | 2021-05-04 | 中国农业大学 | Single controller and detection algorithm of electrically-driven corn precision planter |
-
2005
- 2005-10-27 CN CN 200510114778 patent/CN1751554A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8777707B2 (en) | 2007-10-04 | 2014-07-15 | David Stanley Hoyle | Spreader with GPS guided spread pattern |
| CN101840211A (en) * | 2010-05-27 | 2010-09-22 | 山西农业大学 | Variable control device for fertilizing and sowing |
| CN101840211B (en) * | 2010-05-27 | 2012-09-26 | 山西农业大学 | Variable control device for fertilizing and sowing |
| CN101943899A (en) * | 2010-07-12 | 2011-01-12 | 中国农业大学 | Man-machine interactive system of agricultural variable fertilizing machine |
| CN103250493A (en) * | 2013-05-20 | 2013-08-21 | 葛俊峰 | GPS (Global Positioning System)-based precise seed metering device |
| CN104604411A (en) * | 2015-01-29 | 2015-05-13 | 北京农业智能装备技术研究中心 | Novel dot liquid fertilizer injection device and method |
| CN104604411B (en) * | 2015-01-29 | 2016-08-24 | 北京农业智能装备技术研究中心 | Novel point-like liquid fertilizer-injecting device and method |
| CN108307756A (en) * | 2018-04-04 | 2018-07-24 | 安徽省超艺禾佳农业机械制造有限公司 | A kind of quantization fertilizer spreader |
| CN112740877A (en) * | 2020-12-29 | 2021-05-04 | 中国农业大学 | Single controller and detection algorithm of electrically-driven corn precision planter |
| CN112740877B (en) * | 2020-12-29 | 2022-01-04 | 中国农业大学 | Single controller and detection algorithm of electrically-driven corn precision planter |
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