1. 1 University Of Khartoum Faculty Of Engineering Department Of Agricultural Development Of an electric drive for planter seed metering AMR ALI ELMADIH FALZA OMER Dr. Elkamil Tola

2. 2INTRODUTION The planter's job is to place seed. Proper seed spacing minimizes competition. Proper seed spacing increase crop yields. Factors of seed spacing

3. 3INTRODUTION 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)

4. 4 PROBLEMS OF M.S Slippage chains difficult Not accurate

5. 5OBJEVTIVE (1) To develop an automatic DC- Motor - driven seed metering system. (2) To analyze the performance of the developed system.

6. MATERIAL & METHOED encoder steeper motor Key board Micro controller tractor LCD Seed spacing speed Pluses degree voltage 6

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8. 8 encoder Seed metering DC motor Steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage MATERIAL & METHOED

9. 9 1- Keypad & LCD MATERIAL & METHOED enter the seed spacing. display the number. display the number.

10. 10101010 encoder Seed metering DC motor steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage MATERIAL & METHOED

11. 11 MATERIAL & METHOED 2- Tractor simulation simulation Gearbox Gearbox Variable speed

12. MATERIAL & METHOED encoder Seed metering DC motor Steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage 12

13. 13 MATERIAL & METHOED 3- Encoder Translate speed

14. MATERIAL & METHOED encoder Seed metering DC motor steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage 14

15. MATERIAL & METHOED 4- stepper motor changed according to input data metering device speed. calibration M.S= 4.057777778*D-16.8 (2) M.S= 4.057777778*D-16.8 (2) 15

16. MATERIAL & METHOED M.S ≡ metering device speed (rpm) D ≡ degree of steeper motor (step) 16

17. MATERIAL & METHOED encoder Seed metering DC motor Steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage 17

18. MATERIAL & METHOED 5- Controller processing.Bascom. The controller was used is micro controller ( At mega 32 ) in RH-32 board. The controller was used is micro controller ( At mega 32 ) in RH-32 board. The controller translate data by equation below:- 18

19. 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 is:- D= [(T*100/n*x)+16.8]/4.057777778 (4) D= [(T*100/n*x)+16.8]/4.057777778 (4) MATERIAL & METHOED 19

20. MATERIAL & METHOED encoder encoder Seed metering DC motor Steeper motor Key board Micro controller tractor LCD Seed spacing speed pluses degree voltage 20

21. MATERIAL & METHOED 6- DC motor (500 watt, 1500 rpm) DC motor is directly related to metering device. instead of mechanical system DC motor is supplied from AC-DC converter Armature is changed according to the inputs 21

22. selection DC motor:- MATERIAL & METHOED The mass (10 kg) Maximum metering device speed (278.7rpm) Losses The power is about (400 watt) 22

23. Result 23

24. comparable Electric-System Mechanical-System Increase complex mechanical linkages Decrease complex mechanical linkages Affected by slippage not affected by slippage Random of seed placement uniformity of seed placement difficult for adjusting easy for adjusting Decrease crop production Increase crop production Conclusions 24

25. recommendations Apply in field Control by plc 25

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