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.

MATERIAL & METHOEDMATERIAL & METHOED

encoderencoder

steeper steeper motormotor

Key boardKey board

Micro Micro controllercontrollertractortractor

LCDLCD

Seed Seed spacingspacing

speedspeed PlusesPluses

degreedegree

voltagevoltage

66

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encoderencoder

Seed Seed meteringmetering

DC motorDC motorSteeper Steeper motormotor

Key boardKey board


LCDLCD


speedspeed plusespluses

degreedegree

voltagevoltage


99

11 - -Keypad & LCDKeypad & LCD


enter the seed spacingenter the seed spacing..

display the number.display the number.

1010

encoderencoder


DC motorDC motorsteeper steeper motormotor

Key boardKey board


LCDLCD



degreedegree

voltagevoltage


1111


22 - -TractorTractor

simulationsimulation

GearboxGearbox

Variable speedVariable speed


encoderencoder



Key boardKey board


LCDLCD



degreedegree

voltagevoltage

1212

1313

MATERIAL & METHOEDMATERIAL & METHOED33 - -EncoderEncoder

Translate speedTranslate speed


encoderencoder


DC motorDC motorsteeper steeper motormotor

Key boardKey board


LCDLCD



degreedegree

voltagevoltage

1414

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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encoderencoder



Key boardKey board


LCDLCD



degreedegree

voltagevoltage

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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)


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encoderencoder



Key boardKey board


LCDLCD



degreedegree

voltagevoltage

2020


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-:-:


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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1 university of khartoum faculty of engineering department of agricultural development of an...

Documents

factors of seed spacing

accurate slide

rpm dc motor

selection dc motor

automatic dc motor

stepper motor

keypad lcd material

mechanical system dc