1 university of khartoum faculty of engineering department of agricultural development of an...
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University Of Khartoum University Of Khartoum Faculty Of EngineeringFaculty Of Engineering
Department Of AgriculturalDepartment Of Agricultural
Development Of an electric drive for planter Development Of an electric drive for planter seed meteringseed metering
AMR ALI ELMADIHAMR ALI ELMADIHFALZA OMERFALZA OMER Dr. Elkamil TolaDr. Elkamil Tola
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INTRODUTIONINTRODUTION
The planter's job is to place seed.The planter's job is to place seed.
Proper seed spacing minimizes competition.
Proper seed spacing minimizes competition.
Proper seed spacing increase crop yields.
Proper seed spacing increase crop yields.
Factors of seed spacingFactors of seed spacing
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INTRODUTIONINTRODUTION
Indiana research indicates that a one-inch increase in standard deviation of plant spacing results in yield
losses up to 2.5 bushels per acre.
Indiana research indicates that a one-inch increase in standard deviation of plant spacing results in yield
losses up to 2.5 bushels per acre.
According to Thomason (1998)
According to Thomason (1998)
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PROBLEMS OF M.SPROBLEMS OF M.S
SlippageSlippage chainschains difficultdifficult Not accurate
Not accurate
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OBJEVTIVEOBJEVTIVE
(1) To develop an automatic DC- Motor - driven seed metering system.(1) To develop an automatic DC- Motor - driven seed metering system.
(2) To analyze the performance of the developed system.(2) To analyze the performance of the developed system.
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MATERIAL & METHOEDMATERIAL & METHOED
encoderencoder
steeper steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed PlusesPluses
degreedegree
voltagevoltage
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encoderencoder
Seed Seed meteringmetering
DC motorDC motorSteeper Steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
MATERIAL & METHOEDMATERIAL & METHOED
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11 - -Keypad & LCDKeypad & LCD
MATERIAL & METHOEDMATERIAL & METHOED
enter the seed spacingenter the seed spacing..
display the number.display the number.
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encoderencoder
Seed Seed meteringmetering
DC motorDC motorsteeper steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
MATERIAL & METHOEDMATERIAL & METHOED
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MATERIAL & METHOEDMATERIAL & METHOED
22 - -TractorTractor
simulationsimulation
GearboxGearbox
Variable speedVariable speed
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MATERIAL & METHOEDMATERIAL & METHOED
encoderencoder
Seed Seed meteringmetering
DC motorDC motorSteeper Steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
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MATERIAL & METHOEDMATERIAL & METHOED33 - -EncoderEncoder
Translate speedTranslate speed
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MATERIAL & METHOEDMATERIAL & METHOED
encoderencoder
Seed Seed meteringmetering
DC motorDC motorsteeper steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
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MATERIAL & METHOEDMATERIAL & METHOED44 - -stepper motorstepper motor
changed according to input datachanged according to input data
metering device speedmetering device speed..
calibrationcalibration
M.S= 4.057777778*D-16.8 (2)M.S= 4.057777778*D-16.8 (2)
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MATERIAL & METHOEDMATERIAL & METHOEDM.S ≡ metering device speed (rpm)M.S ≡ metering device speed (rpm)D ≡ degree of steeper motor (step)D ≡ degree of steeper motor (step)
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MATERIAL & METHOEDMATERIAL & METHOED
encoderencoder
Seed Seed meteringmetering
DC motorDC motorSteeper Steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
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MATERIAL & METHOEDMATERIAL & METHOED
55 - -ControllerController
processing.processing.
Bascom.Bascom.
The controller was used is micro The controller was used is micro controller ( At mega 32 ) in RH-32 controller ( At mega 32 ) in RH-32 board.board.
The controller translate data by The controller translate data by equation below:-equation below:-
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M.S= T*100/n*x (3)M.S= T*100/n*x (3)
M.S= 4.057777778*D-16.8 (2)M.S= 4.057777778*D-16.8 (2)
From above equations, the degree of steeper isFrom above equations, the degree of steeper is-:-: D= [(T*100/n*x)+16.8]/4.057777778 (4)D= [(T*100/n*x)+16.8]/4.057777778 (4)
MATERIAL & METHOEDMATERIAL & METHOED
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MATERIAL & METHOEDMATERIAL & METHOED
encoderencoder
Seed Seed meteringmetering
DC motorDC motorSteeper Steeper motormotor
Key boardKey board
Micro Micro controllercontrollertractortractor
LCDLCD
Seed Seed spacingspacing
speedspeed plusespluses
degreedegree
voltagevoltage
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MATERIAL & METHOEDMATERIAL & METHOED
66 - -DC motorDC motor(500 watt, 1500 rpm)(500 watt, 1500 rpm)
DC motor is directly related to DC motor is directly related to metering device. metering device.
instead of mechanical system instead of mechanical system
DC motor is supplied from AC-DC DC motor is supplied from AC-DC converterconverter
Armature is changed according to the inputsArmature is changed according to the inputs
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selection DC motorselection DC motor-:-:
MATERIAL & METHOEDMATERIAL & METHOED
The mass The mass (10 kg)(10 kg)
Maximum metering device Maximum metering device speed speed (278.7rpm)(278.7rpm)
Losses Losses
The power is about The power is about (400 watt)(400 watt)
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ResultResult
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comparablecomparable
Electric-SystemElectric-SystemMechanical-SystemMechanical-System
Increase complex mechanical linkages
Increase complex mechanical linkages
Decrease complex mechanical linkages
Decrease complex mechanical linkages
Affected by slippageAffected by slippage not affected by slippage
not affected by slippage
Random of seed placement
Random of seed placement
uniformity of seed placement
uniformity of seed placement
difficult for adjustingdifficult for adjusting easy for adjustingeasy for adjustingDecrease crop production
Decrease crop production
Increase crop production
Increase crop production
ConclusionsConclusions
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recommendationsrecommendations
Apply in field Apply in field
Control by plcControl by plc
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